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+// stb_truetype.h - v1.08 - public domain
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+// authored from 2009-2015 by Sean Barrett / RAD Game Tools
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+//
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+// This library processes TrueType files:
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+// parse files
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+// extract glyph metrics
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+// extract glyph shapes
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+// render glyphs to one-channel bitmaps with antialiasing (box filter)
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+//
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+// Todo:
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+// non-MS cmaps
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+// crashproof on bad data
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+// hinting? (no longer patented)
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+// cleartype-style AA?
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+// optimize: use simple memory allocator for intermediates
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+// optimize: build edge-list directly from curves
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+// optimize: rasterize directly from curves?
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+//
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+// ADDITIONAL CONTRIBUTORS
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+//
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+// Mikko Mononen: compound shape support, more cmap formats
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+// Tor Andersson: kerning, subpixel rendering
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+//
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+// Bug/warning reports/fixes:
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+// "Zer" on mollyrocket (with fix)
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+// Cass Everitt
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+// stoiko (Haemimont Games)
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+// Brian Hook
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+// Walter van Niftrik
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+// David Gow
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+// David Given
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+// Ivan-Assen Ivanov
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+// Anthony Pesch
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+// Johan Duparc
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+// Hou Qiming
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+// Fabian "ryg" Giesen
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+// Martins Mozeiko
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+// Cap Petschulat
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+// Omar Cornut
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+// github:aloucks
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+// Peter LaValle
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+// Sergey Popov
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+// Giumo X. Clanjor
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+// Higor Euripedes
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+//
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+// Misc other:
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+// Ryan Gordon
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+//
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+// VERSION HISTORY
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+//
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+// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
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+// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
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+// variant PackFontRanges to pack and render in separate phases;
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+// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
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+// fixed an assert() bug in the new rasterizer
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+// replace assert() with STBTT_assert() in new rasterizer
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+// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine)
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+// also more precise AA rasterizer, except if shapes overlap
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+// remove need for STBTT_sort
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+// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
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+// 1.04 (2015-04-15) typo in example
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+// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes
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+//
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+// Full history can be found at the end of this file.
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+//
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+// LICENSE
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+//
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+// This software is in the public domain. Where that dedication is not
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+// recognized, you are granted a perpetual, irrevocable license to copy,
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+// distribute, and modify this file as you see fit.
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+//
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+// USAGE
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+//
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+// Include this file in whatever places neeed to refer to it. In ONE C/C++
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+// file, write:
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+// #define STB_TRUETYPE_IMPLEMENTATION
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+// before the #include of this file. This expands out the actual
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+// implementation into that C/C++ file.
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+//
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+// To make the implementation private to the file that generates the implementation,
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+// #define STBTT_STATIC
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+//
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+// Simple 3D API (don't ship this, but it's fine for tools and quick start)
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+// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture
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+// stbtt_GetBakedQuad() -- compute quad to draw for a given char
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+//
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+// Improved 3D API (more shippable):
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+// #include "stb_rect_pack.h" -- optional, but you really want it
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+// stbtt_PackBegin()
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+// stbtt_PackSetOversample() -- for improved quality on small fonts
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+// stbtt_PackFontRanges() -- pack and renders
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+// stbtt_PackEnd()
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+// stbtt_GetPackedQuad()
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+//
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+// "Load" a font file from a memory buffer (you have to keep the buffer loaded)
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+// stbtt_InitFont()
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+// stbtt_GetFontOffsetForIndex() -- use for TTC font collections
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+//
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+// Render a unicode codepoint to a bitmap
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+// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
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+// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide
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+// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be
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+//
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+// Character advance/positioning
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+// stbtt_GetCodepointHMetrics()
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+// stbtt_GetFontVMetrics()
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+// stbtt_GetCodepointKernAdvance()
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+//
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+// Starting with version 1.06, the rasterizer was replaced with a new,
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+// faster and generally-more-precise rasterizer. The new rasterizer more
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+// accurately measures pixel coverage for anti-aliasing, except in the case
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+// where multiple shapes overlap, in which case it overestimates the AA pixel
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+// coverage. Thus, anti-aliasing of intersecting shapes may look wrong. If
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+// this turns out to be a problem, you can re-enable the old rasterizer with
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+// #define STBTT_RASTERIZER_VERSION 1
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+// which will incur about a 15% speed hit.
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+//
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+// ADDITIONAL DOCUMENTATION
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+//
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+// Immediately after this block comment are a series of sample programs.
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+//
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+// After the sample programs is the "header file" section. This section
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+// includes documentation for each API function.
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+//
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+// Some important concepts to understand to use this library:
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+//
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+// Codepoint
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+// Characters are defined by unicode codepoints, e.g. 65 is
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+// uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is
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+// the hiragana for "ma".
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+//
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+// Glyph
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+// A visual character shape (every codepoint is rendered as
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+// some glyph)
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+//
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+// Glyph index
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+// A font-specific integer ID representing a glyph
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+//
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+// Baseline
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+// Glyph shapes are defined relative to a baseline, which is the
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+// bottom of uppercase characters. Characters extend both above
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+// and below the baseline.
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+//
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+// Current Point
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+// As you draw text to the screen, you keep track of a "current point"
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+// which is the origin of each character. The current point's vertical
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+// position is the baseline. Even "baked fonts" use this model.
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+//
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+// Vertical Font Metrics
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+// The vertical qualities of the font, used to vertically position
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+// and space the characters. See docs for stbtt_GetFontVMetrics.
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+//
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+// Font Size in Pixels or Points
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+// The preferred interface for specifying font sizes in stb_truetype
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+// is to specify how tall the font's vertical extent should be in pixels.
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+// If that sounds good enough, skip the next paragraph.
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+//
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+// Most font APIs instead use "points", which are a common typographic
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+// measurement for describing font size, defined as 72 points per inch.
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+// stb_truetype provides a point API for compatibility. However, true
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+// "per inch" conventions don't make much sense on computer displays
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+// since they different monitors have different number of pixels per
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+// inch. For example, Windows traditionally uses a convention that
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+// there are 96 pixels per inch, thus making 'inch' measurements have
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+// nothing to do with inches, and thus effectively defining a point to
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+// be 1.333 pixels. Additionally, the TrueType font data provides
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+// an explicit scale factor to scale a given font's glyphs to points,
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+// but the author has observed that this scale factor is often wrong
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+// for non-commercial fonts, thus making fonts scaled in points
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+// according to the TrueType spec incoherently sized in practice.
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+//
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+// ADVANCED USAGE
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+//
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+// Quality:
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+//
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+// - Use the functions with Subpixel at the end to allow your characters
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+// to have subpixel positioning. Since the font is anti-aliased, not
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+// hinted, this is very import for quality. (This is not possible with
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+// baked fonts.)
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+//
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+// - Kerning is now supported, and if you're supporting subpixel rendering
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+// then kerning is worth using to give your text a polished look.
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+//
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+// Performance:
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+//
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+// - Convert Unicode codepoints to glyph indexes and operate on the glyphs;
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+// if you don't do this, stb_truetype is forced to do the conversion on
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+// every call.
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+//
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+// - There are a lot of memory allocations. We should modify it to take
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+// a temp buffer and allocate from the temp buffer (without freeing),
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+// should help performance a lot.
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+//
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+// NOTES
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+//
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+// The system uses the raw data found in the .ttf file without changing it
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+// and without building auxiliary data structures. This is a bit inefficient
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+// on little-endian systems (the data is big-endian), but assuming you're
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+// caching the bitmaps or glyph shapes this shouldn't be a big deal.
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+//
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+// It appears to be very hard to programmatically determine what font a
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+// given file is in a general way. I provide an API for this, but I don't
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+// recommend it.
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+//
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+//
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+// SOURCE STATISTICS (based on v0.6c, 2050 LOC)
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+//
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+// Documentation & header file 520 LOC \___ 660 LOC documentation
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+// Sample code 140 LOC /
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+// Truetype parsing 620 LOC ---- 620 LOC TrueType
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+// Software rasterization 240 LOC \ .
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+// Curve tesselation 120 LOC \__ 550 LOC Bitmap creation
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+// Bitmap management 100 LOC /
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+// Baked bitmap interface 70 LOC /
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+// Font name matching & access 150 LOC ---- 150
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+// C runtime library abstraction 60 LOC ---- 60
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+//
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+//
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+// PERFORMANCE MEASUREMENTS FOR 1.06:
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+//
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+// 32-bit 64-bit
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+// Previous release: 8.83 s 7.68 s
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+// Pool allocations: 7.72 s 6.34 s
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+// Inline sort : 6.54 s 5.65 s
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+// New rasterizer : 5.63 s 5.00 s
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+
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+//////////////////////////////////////////////////////////////////////////////
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+//////////////////////////////////////////////////////////////////////////////
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+////
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+//// SAMPLE PROGRAMS
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+////
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+//
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+// Incomplete text-in-3d-api example, which draws quads properly aligned to be lossless
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+//
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+#if 0
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+#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
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+#include "stb_truetype.h"
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+
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+unsigned char ttf_buffer[1<<20];
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+unsigned char temp_bitmap[512*512];
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+
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+stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs
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+GLuint ftex;
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+
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+void my_stbtt_initfont(void)
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+{
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+ fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));
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+ stbtt_BakeFontBitmap(ttf_buffer,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
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+ // can free ttf_buffer at this point
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+ glGenTextures(1, &ftex);
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+ glBindTexture(GL_TEXTURE_2D, ftex);
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+ glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512,512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);
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+ // can free temp_bitmap at this point
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+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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+}
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+
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+void my_stbtt_print(float x, float y, char *text)
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+{
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+ // assume orthographic projection with units = screen pixels, origin at top left
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+ glEnable(GL_TEXTURE_2D);
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+ glBindTexture(GL_TEXTURE_2D, ftex);
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+ glBegin(GL_QUADS);
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+ while (*text) {
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+ if (*text >= 32 && *text < 128) {
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+ stbtt_aligned_quad q;
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+ stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9
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+ glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y0);
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+ glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y0);
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+ glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y1);
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+ glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y1);
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+ }
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+ ++text;
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+ }
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+ glEnd();
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+}
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+#endif
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+//
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+//
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+//////////////////////////////////////////////////////////////////////////////
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+//
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+// Complete program (this compiles): get a single bitmap, print as ASCII art
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+//
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+#if 0
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+#include <stdio.h>
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+#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
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+#include "stb_truetype.h"
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+
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+char ttf_buffer[1<<25];
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+
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+int main(int argc, char **argv)
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+{
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+ stbtt_fontinfo font;
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+ unsigned char *bitmap;
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+ int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20);
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+
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+ fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb"));
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+
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+ stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));
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+ bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0);
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+
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+ for (j=0; j < h; ++j) {
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+ for (i=0; i < w; ++i)
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+ putchar(" .:ioVM@"[bitmap[j*w+i]>>5]);
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+ putchar('\n');
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+ }
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+ return 0;
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+}
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+#endif
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+//
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+// Output:
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+//
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+// .ii.
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+// @@@@@@.
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+// V@Mio@@o
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+// :i. V@V
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+// :oM@@M
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+// :@@@MM@M
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+// @@o o@M
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+// :@@. M@M
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+// @@@o@@@@
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+// :M@@V:@@.
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+//
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+//////////////////////////////////////////////////////////////////////////////
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+//
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+// Complete program: print "Hello World!" banner, with bugs
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+//
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+#if 0
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+char buffer[24<<20];
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+unsigned char screen[20][79];
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+
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+int main(int arg, char **argv)
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+{
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+ stbtt_fontinfo font;
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+ int i,j,ascent,baseline,ch=0;
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+ float scale, xpos=2; // leave a little padding in case the character extends left
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+ char *text = "Heljo World!"; // intentionally misspelled to show 'lj' brokenness
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+
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+ fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb"));
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+ stbtt_InitFont(&font, buffer, 0);
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+
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+ scale = stbtt_ScaleForPixelHeight(&font, 15);
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+ stbtt_GetFontVMetrics(&font, &ascent,0,0);
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+ baseline = (int) (ascent*scale);
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+
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+ while (text[ch]) {
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+ int advance,lsb,x0,y0,x1,y1;
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+ float x_shift = xpos - (float) floor(xpos);
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+ stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb);
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+ stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1);
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+ stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]);
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+ // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong
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+ // because this API is really for baking character bitmaps into textures. if you want to render
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+ // a sequence of characters, you really need to render each bitmap to a temp buffer, then
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+ // "alpha blend" that into the working buffer
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+ xpos += (advance * scale);
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+ if (text[ch+1])
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+ xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]);
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+ ++ch;
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+ }
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+
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+ for (j=0; j < 20; ++j) {
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+ for (i=0; i < 78; ++i)
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+ putchar(" .:ioVM@"[screen[j][i]>>5]);
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+ putchar('\n');
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+ }
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+
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+ return 0;
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+}
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+#endif
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+
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+
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+//////////////////////////////////////////////////////////////////////////////
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+//////////////////////////////////////////////////////////////////////////////
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|
|
+////
|
|
|
+//// INTEGRATION WITH YOUR CODEBASE
|
|
|
+////
|
|
|
+//// The following sections allow you to supply alternate definitions
|
|
|
+//// of C library functions used by stb_truetype.
|
|
|
+
|
|
|
+#ifdef STB_TRUETYPE_IMPLEMENTATION
|
|
|
+ // #define your own (u)stbtt_int8/16/32 before including to override this
|
|
|
+ #ifndef stbtt_uint8
|
|
|
+ typedef unsigned char stbtt_uint8;
|
|
|
+ typedef signed char stbtt_int8;
|
|
|
+ typedef unsigned short stbtt_uint16;
|
|
|
+ typedef signed short stbtt_int16;
|
|
|
+ typedef unsigned int stbtt_uint32;
|
|
|
+ typedef signed int stbtt_int32;
|
|
|
+ #endif
|
|
|
+
|
|
|
+ typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
|
|
|
+ typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
|
|
|
+
|
|
|
+ // #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h
|
|
|
+ #ifndef STBTT_ifloor
|
|
|
+ #include <math.h>
|
|
|
+ #define STBTT_ifloor(x) ((int) floor(x))
|
|
|
+ #define STBTT_iceil(x) ((int) ceil(x))
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #ifndef STBTT_sqrt
|
|
|
+ #include <math.h>
|
|
|
+ #define STBTT_sqrt(x) sqrt(x)
|
|
|
+ #endif
|
|
|
+
|
|
|
+ // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h
|
|
|
+ #ifndef STBTT_malloc
|
|
|
+ #include <stdlib.h>
|
|
|
+ #define STBTT_malloc(x,u) ((void)(u),malloc(x))
|
|
|
+ #define STBTT_free(x,u) ((void)(u),free(x))
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #ifndef STBTT_assert
|
|
|
+ #include <assert.h>
|
|
|
+ #define STBTT_assert(x) assert(x)
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #ifndef STBTT_strlen
|
|
|
+ #include <string.h>
|
|
|
+ #define STBTT_strlen(x) strlen(x)
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #ifndef STBTT_memcpy
|
|
|
+ #include <memory.h>
|
|
|
+ #define STBTT_memcpy memcpy
|
|
|
+ #define STBTT_memset memset
|
|
|
+ #endif
|
|
|
+#endif
|
|
|
+
|
|
|
+///////////////////////////////////////////////////////////////////////////////
|
|
|
+///////////////////////////////////////////////////////////////////////////////
|
|
|
+////
|
|
|
+//// INTERFACE
|
|
|
+////
|
|
|
+////
|
|
|
+
|
|
|
+#ifndef __STB_INCLUDE_STB_TRUETYPE_H__
|
|
|
+#define __STB_INCLUDE_STB_TRUETYPE_H__
|
|
|
+
|
|
|
+#ifdef STBTT_STATIC
|
|
|
+#define STBTT_DEF static
|
|
|
+#else
|
|
|
+#define STBTT_DEF extern
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef __cplusplus
|
|
|
+extern "C" {
|
|
|
+#endif
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// TEXTURE BAKING API
|
|
|
+//
|
|
|
+// If you use this API, you only have to call two functions ever.
|
|
|
+//
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
|
|
|
+ float xoff,yoff,xadvance;
|
|
|
+} stbtt_bakedchar;
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf)
|
|
|
+ float pixel_height, // height of font in pixels
|
|
|
+ unsigned char *pixels, int pw, int ph, // bitmap to be filled in
|
|
|
+ int first_char, int num_chars, // characters to bake
|
|
|
+ stbtt_bakedchar *chardata); // you allocate this, it's num_chars long
|
|
|
+// if return is positive, the first unused row of the bitmap
|
|
|
+// if return is negative, returns the negative of the number of characters that fit
|
|
|
+// if return is 0, no characters fit and no rows were used
|
|
|
+// This uses a very crappy packing.
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ float x0,y0,s0,t0; // top-left
|
|
|
+ float x1,y1,s1,t1; // bottom-right
|
|
|
+} stbtt_aligned_quad;
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, // same data as above
|
|
|
+ int char_index, // character to display
|
|
|
+ float *xpos, float *ypos, // pointers to current position in screen pixel space
|
|
|
+ stbtt_aligned_quad *q, // output: quad to draw
|
|
|
+ int opengl_fillrule); // true if opengl fill rule; false if DX9 or earlier
|
|
|
+// Call GetBakedQuad with char_index = 'character - first_char', and it
|
|
|
+// creates the quad you need to draw and advances the current position.
|
|
|
+//
|
|
|
+// The coordinate system used assumes y increases downwards.
|
|
|
+//
|
|
|
+// Characters will extend both above and below the current position;
|
|
|
+// see discussion of "BASELINE" above.
|
|
|
+//
|
|
|
+// It's inefficient; you might want to c&p it and optimize it.
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// NEW TEXTURE BAKING API
|
|
|
+//
|
|
|
+// This provides options for packing multiple fonts into one atlas, not
|
|
|
+// perfectly but better than nothing.
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
|
|
|
+ float xoff,yoff,xadvance;
|
|
|
+ float xoff2,yoff2;
|
|
|
+} stbtt_packedchar;
|
|
|
+
|
|
|
+typedef struct stbtt_pack_context stbtt_pack_context;
|
|
|
+typedef struct stbtt_fontinfo stbtt_fontinfo;
|
|
|
+#ifndef STB_RECT_PACK_VERSION
|
|
|
+typedef struct stbrp_rect stbrp_rect;
|
|
|
+#endif
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
|
|
|
+// Initializes a packing context stored in the passed-in stbtt_pack_context.
|
|
|
+// Future calls using this context will pack characters into the bitmap passed
|
|
|
+// in here: a 1-channel bitmap that is weight x height. stride_in_bytes is
|
|
|
+// the distance from one row to the next (or 0 to mean they are packed tightly
|
|
|
+// together). "padding" is the amount of padding to leave between each
|
|
|
+// character (normally you want '1' for bitmaps you'll use as textures with
|
|
|
+// bilinear filtering).
|
|
|
+//
|
|
|
+// Returns 0 on failure, 1 on success.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc);
|
|
|
+// Cleans up the packing context and frees all memory.
|
|
|
+
|
|
|
+#define STBTT_POINT_SIZE(x) (-(x))
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
|
|
|
+ int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range);
|
|
|
+// Creates character bitmaps from the font_index'th font found in fontdata (use
|
|
|
+// font_index=0 if you don't know what that is). It creates num_chars_in_range
|
|
|
+// bitmaps for characters with unicode values starting at first_unicode_char_in_range
|
|
|
+// and increasing. Data for how to render them is stored in chardata_for_range;
|
|
|
+// pass these to stbtt_GetPackedQuad to get back renderable quads.
|
|
|
+//
|
|
|
+// font_size is the full height of the character from ascender to descender,
|
|
|
+// as computed by stbtt_ScaleForPixelHeight. To use a point size as computed
|
|
|
+// by stbtt_ScaleForMappingEmToPixels, wrap the point size in STBTT_POINT_SIZE()
|
|
|
+// and pass that result as 'font_size':
|
|
|
+// ..., 20 , ... // font max minus min y is 20 pixels tall
|
|
|
+// ..., STBTT_POINT_SIZE(20), ... // 'M' is 20 pixels tall
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ float font_size;
|
|
|
+ int first_unicode_codepoint_in_range; // if non-zero, then the chars are continuous, and this is the first codepoint
|
|
|
+ int *array_of_unicode_codepoints; // if non-zero, then this is an array of unicode codepoints
|
|
|
+ int num_chars;
|
|
|
+ stbtt_packedchar *chardata_for_range; // output
|
|
|
+ unsigned char h_oversample, v_oversample; // don't set these, they're used internally
|
|
|
+} stbtt_pack_range;
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
|
|
|
+// Creates character bitmaps from multiple ranges of characters stored in
|
|
|
+// ranges. This will usually create a better-packed bitmap than multiple
|
|
|
+// calls to stbtt_PackFontRange. Note that you can call this multiple
|
|
|
+// times within a single PackBegin/PackEnd.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
|
|
|
+// Oversampling a font increases the quality by allowing higher-quality subpixel
|
|
|
+// positioning, and is especially valuable at smaller text sizes.
|
|
|
+//
|
|
|
+// This function sets the amount of oversampling for all following calls to
|
|
|
+// stbtt_PackFontRange(s) or stbtt_PackFontRangesGatherRects for a given
|
|
|
+// pack context. The default (no oversampling) is achieved by h_oversample=1
|
|
|
+// and v_oversample=1. The total number of pixels required is
|
|
|
+// h_oversample*v_oversample larger than the default; for example, 2x2
|
|
|
+// oversampling requires 4x the storage of 1x1. For best results, render
|
|
|
+// oversampled textures with bilinear filtering. Look at the readme in
|
|
|
+// stb/tests/oversample for information about oversampled fonts
|
|
|
+//
|
|
|
+// To use with PackFontRangesGather etc., you must set it before calls
|
|
|
+// call to PackFontRangesGatherRects.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, // same data as above
|
|
|
+ int char_index, // character to display
|
|
|
+ float *xpos, float *ypos, // pointers to current position in screen pixel space
|
|
|
+ stbtt_aligned_quad *q, // output: quad to draw
|
|
|
+ int align_to_integer);
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
|
|
|
+STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects);
|
|
|
+STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
|
|
|
+// Calling these functions in sequence is roughly equivalent to calling
|
|
|
+// stbtt_PackFontRanges(). If you more control over the packing of multiple
|
|
|
+// fonts, or if you want to pack custom data into a font texture, take a look
|
|
|
+// at the source to of stbtt_PackFontRanges() and create a custom version
|
|
|
+// using these functions, e.g. call GatherRects multiple times,
|
|
|
+// building up a single array of rects, then call PackRects once,
|
|
|
+// then call RenderIntoRects repeatedly. This may result in a
|
|
|
+// better packing than calling PackFontRanges multiple times
|
|
|
+// (or it may not).
|
|
|
+
|
|
|
+// this is an opaque structure that you shouldn't mess with which holds
|
|
|
+// all the context needed from PackBegin to PackEnd.
|
|
|
+struct stbtt_pack_context {
|
|
|
+ void *user_allocator_context;
|
|
|
+ void *pack_info;
|
|
|
+ int width;
|
|
|
+ int height;
|
|
|
+ int stride_in_bytes;
|
|
|
+ int padding;
|
|
|
+ unsigned int h_oversample, v_oversample;
|
|
|
+ unsigned char *pixels;
|
|
|
+ void *nodes;
|
|
|
+};
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// FONT LOADING
|
|
|
+//
|
|
|
+//
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
|
|
|
+// Each .ttf/.ttc file may have more than one font. Each font has a sequential
|
|
|
+// index number starting from 0. Call this function to get the font offset for
|
|
|
+// a given index; it returns -1 if the index is out of range. A regular .ttf
|
|
|
+// file will only define one font and it always be at offset 0, so it will
|
|
|
+// return '0' for index 0, and -1 for all other indices. You can just skip
|
|
|
+// this step if you know it's that kind of font.
|
|
|
+
|
|
|
+
|
|
|
+// The following structure is defined publically so you can declare one on
|
|
|
+// the stack or as a global or etc, but you should treat it as opaque.
|
|
|
+typedef struct stbtt_fontinfo
|
|
|
+{
|
|
|
+ void * userdata;
|
|
|
+ unsigned char * data; // pointer to .ttf file
|
|
|
+ int fontstart; // offset of start of font
|
|
|
+
|
|
|
+ int numGlyphs; // number of glyphs, needed for range checking
|
|
|
+
|
|
|
+ int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf
|
|
|
+ int index_map; // a cmap mapping for our chosen character encoding
|
|
|
+ int indexToLocFormat; // format needed to map from glyph index to glyph
|
|
|
+} stbtt_fontinfo;
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
|
|
|
+// Given an offset into the file that defines a font, this function builds
|
|
|
+// the necessary cached info for the rest of the system. You must allocate
|
|
|
+// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't
|
|
|
+// need to do anything special to free it, because the contents are pure
|
|
|
+// value data with no additional data structures. Returns 0 on failure.
|
|
|
+
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// CHARACTER TO GLYPH-INDEX CONVERSIOn
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
|
|
|
+// If you're going to perform multiple operations on the same character
|
|
|
+// and you want a speed-up, call this function with the character you're
|
|
|
+// going to process, then use glyph-based functions instead of the
|
|
|
+// codepoint-based functions.
|
|
|
+
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// CHARACTER PROPERTIES
|
|
|
+//
|
|
|
+
|
|
|
+STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
|
|
|
+// computes a scale factor to produce a font whose "height" is 'pixels' tall.
|
|
|
+// Height is measured as the distance from the highest ascender to the lowest
|
|
|
+// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics
|
|
|
+// and computing:
|
|
|
+// scale = pixels / (ascent - descent)
|
|
|
+// so if you prefer to measure height by the ascent only, use a similar calculation.
|
|
|
+
|
|
|
+STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
|
|
|
+// computes a scale factor to produce a font whose EM size is mapped to
|
|
|
+// 'pixels' tall. This is probably what traditional APIs compute, but
|
|
|
+// I'm not positive.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
|
|
|
+// ascent is the coordinate above the baseline the font extends; descent
|
|
|
+// is the coordinate below the baseline the font extends (i.e. it is typically negative)
|
|
|
+// lineGap is the spacing between one row's descent and the next row's ascent...
|
|
|
+// so you should advance the vertical position by "*ascent - *descent + *lineGap"
|
|
|
+// these are expressed in unscaled coordinates, so you must multiply by
|
|
|
+// the scale factor for a given size
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
|
|
|
+// the bounding box around all possible characters
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
|
|
|
+// leftSideBearing is the offset from the current horizontal position to the left edge of the character
|
|
|
+// advanceWidth is the offset from the current horizontal position to the next horizontal position
|
|
|
+// these are expressed in unscaled coordinates
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
|
|
|
+// an additional amount to add to the 'advance' value between ch1 and ch2
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
|
|
|
+// Gets the bounding box of the visible part of the glyph, in unscaled coordinates
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
|
|
|
+STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
|
|
|
+STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
|
|
|
+// as above, but takes one or more glyph indices for greater efficiency
|
|
|
+
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// GLYPH SHAPES (you probably don't need these, but they have to go before
|
|
|
+// the bitmaps for C declaration-order reasons)
|
|
|
+//
|
|
|
+
|
|
|
+#ifndef STBTT_vmove // you can predefine these to use different values (but why?)
|
|
|
+ enum {
|
|
|
+ STBTT_vmove=1,
|
|
|
+ STBTT_vline,
|
|
|
+ STBTT_vcurve
|
|
|
+ };
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifndef stbtt_vertex // you can predefine this to use different values
|
|
|
+ // (we share this with other code at RAD)
|
|
|
+ #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file
|
|
|
+ typedef struct
|
|
|
+ {
|
|
|
+ stbtt_vertex_type x,y,cx,cy;
|
|
|
+ unsigned char type,padding;
|
|
|
+ } stbtt_vertex;
|
|
|
+#endif
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
|
|
|
+// returns non-zero if nothing is drawn for this glyph
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
|
|
|
+STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
|
|
|
+// returns # of vertices and fills *vertices with the pointer to them
|
|
|
+// these are expressed in "unscaled" coordinates
|
|
|
+//
|
|
|
+// The shape is a series of countours. Each one starts with
|
|
|
+// a STBTT_moveto, then consists of a series of mixed
|
|
|
+// STBTT_lineto and STBTT_curveto segments. A lineto
|
|
|
+// draws a line from previous endpoint to its x,y; a curveto
|
|
|
+// draws a quadratic bezier from previous endpoint to
|
|
|
+// its x,y, using cx,cy as the bezier control point.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
|
|
|
+// frees the data allocated above
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// BITMAP RENDERING
|
|
|
+//
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
|
|
|
+// frees the bitmap allocated below
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
|
|
|
+// allocates a large-enough single-channel 8bpp bitmap and renders the
|
|
|
+// specified character/glyph at the specified scale into it, with
|
|
|
+// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque).
|
|
|
+// *width & *height are filled out with the width & height of the bitmap,
|
|
|
+// which is stored left-to-right, top-to-bottom.
|
|
|
+//
|
|
|
+// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
|
|
|
+// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel
|
|
|
+// shift for the character
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
|
|
|
+// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap
|
|
|
+// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap
|
|
|
+// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the
|
|
|
+// width and height and positioning info for it first.
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);
|
|
|
+// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel
|
|
|
+// shift for the character
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
|
|
|
+// get the bbox of the bitmap centered around the glyph origin; so the
|
|
|
+// bitmap width is ix1-ix0, height is iy1-iy0, and location to place
|
|
|
+// the bitmap top left is (leftSideBearing*scale,iy0).
|
|
|
+// (Note that the bitmap uses y-increases-down, but the shape uses
|
|
|
+// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.)
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
|
|
|
+// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel
|
|
|
+// shift for the character
|
|
|
+
|
|
|
+// the following functions are equivalent to the above functions, but operate
|
|
|
+// on glyph indices instead of Unicode codepoints (for efficiency)
|
|
|
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
|
|
|
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);
|
|
|
+STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);
|
|
|
+STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);
|
|
|
+STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
|
|
|
+STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
|
|
|
+
|
|
|
+
|
|
|
+// @TODO: don't expose this structure
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ int w,h,stride;
|
|
|
+ unsigned char *pixels;
|
|
|
+} stbtt__bitmap;
|
|
|
+
|
|
|
+// rasterize a shape with quadratic beziers into a bitmap
|
|
|
+STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, // 1-channel bitmap to draw into
|
|
|
+ float flatness_in_pixels, // allowable error of curve in pixels
|
|
|
+ stbtt_vertex *vertices, // array of vertices defining shape
|
|
|
+ int num_verts, // number of vertices in above array
|
|
|
+ float scale_x, float scale_y, // scale applied to input vertices
|
|
|
+ float shift_x, float shift_y, // translation applied to input vertices
|
|
|
+ int x_off, int y_off, // another translation applied to input
|
|
|
+ int invert, // if non-zero, vertically flip shape
|
|
|
+ void *userdata); // context for to STBTT_MALLOC
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// Finding the right font...
|
|
|
+//
|
|
|
+// You should really just solve this offline, keep your own tables
|
|
|
+// of what font is what, and don't try to get it out of the .ttf file.
|
|
|
+// That's because getting it out of the .ttf file is really hard, because
|
|
|
+// the names in the file can appear in many possible encodings, in many
|
|
|
+// possible languages, and e.g. if you need a case-insensitive comparison,
|
|
|
+// the details of that depend on the encoding & language in a complex way
|
|
|
+// (actually underspecified in truetype, but also gigantic).
|
|
|
+//
|
|
|
+// But you can use the provided functions in two possible ways:
|
|
|
+// stbtt_FindMatchingFont() will use *case-sensitive* comparisons on
|
|
|
+// unicode-encoded names to try to find the font you want;
|
|
|
+// you can run this before calling stbtt_InitFont()
|
|
|
+//
|
|
|
+// stbtt_GetFontNameString() lets you get any of the various strings
|
|
|
+// from the file yourself and do your own comparisons on them.
|
|
|
+// You have to have called stbtt_InitFont() first.
|
|
|
+
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
|
|
|
+// returns the offset (not index) of the font that matches, or -1 if none
|
|
|
+// if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold".
|
|
|
+// if you use any other flag, use a font name like "Arial"; this checks
|
|
|
+// the 'macStyle' header field; i don't know if fonts set this consistently
|
|
|
+#define STBTT_MACSTYLE_DONTCARE 0
|
|
|
+#define STBTT_MACSTYLE_BOLD 1
|
|
|
+#define STBTT_MACSTYLE_ITALIC 2
|
|
|
+#define STBTT_MACSTYLE_UNDERSCORE 4
|
|
|
+#define STBTT_MACSTYLE_NONE 8 // <= not same as 0, this makes us check the bitfield is 0
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
|
|
|
+// returns 1/0 whether the first string interpreted as utf8 is identical to
|
|
|
+// the second string interpreted as big-endian utf16... useful for strings from next func
|
|
|
+
|
|
|
+STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
|
|
|
+// returns the string (which may be big-endian double byte, e.g. for unicode)
|
|
|
+// and puts the length in bytes in *length.
|
|
|
+//
|
|
|
+// some of the values for the IDs are below; for more see the truetype spec:
|
|
|
+// http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
|
|
|
+// http://www.microsoft.com/typography/otspec/name.htm
|
|
|
+
|
|
|
+enum { // platformID
|
|
|
+ STBTT_PLATFORM_ID_UNICODE =0,
|
|
|
+ STBTT_PLATFORM_ID_MAC =1,
|
|
|
+ STBTT_PLATFORM_ID_ISO =2,
|
|
|
+ STBTT_PLATFORM_ID_MICROSOFT =3
|
|
|
+};
|
|
|
+
|
|
|
+enum { // encodingID for STBTT_PLATFORM_ID_UNICODE
|
|
|
+ STBTT_UNICODE_EID_UNICODE_1_0 =0,
|
|
|
+ STBTT_UNICODE_EID_UNICODE_1_1 =1,
|
|
|
+ STBTT_UNICODE_EID_ISO_10646 =2,
|
|
|
+ STBTT_UNICODE_EID_UNICODE_2_0_BMP=3,
|
|
|
+ STBTT_UNICODE_EID_UNICODE_2_0_FULL=4
|
|
|
+};
|
|
|
+
|
|
|
+enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT
|
|
|
+ STBTT_MS_EID_SYMBOL =0,
|
|
|
+ STBTT_MS_EID_UNICODE_BMP =1,
|
|
|
+ STBTT_MS_EID_SHIFTJIS =2,
|
|
|
+ STBTT_MS_EID_UNICODE_FULL =10
|
|
|
+};
|
|
|
+
|
|
|
+enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes
|
|
|
+ STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4,
|
|
|
+ STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5,
|
|
|
+ STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6,
|
|
|
+ STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7
|
|
|
+};
|
|
|
+
|
|
|
+enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID...
|
|
|
+ // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs
|
|
|
+ STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410,
|
|
|
+ STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411,
|
|
|
+ STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412,
|
|
|
+ STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419,
|
|
|
+ STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409,
|
|
|
+ STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D
|
|
|
+};
|
|
|
+
|
|
|
+enum { // languageID for STBTT_PLATFORM_ID_MAC
|
|
|
+ STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11,
|
|
|
+ STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23,
|
|
|
+ STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32,
|
|
|
+ STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 ,
|
|
|
+ STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 ,
|
|
|
+ STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33,
|
|
|
+ STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19
|
|
|
+};
|
|
|
+
|
|
|
+#ifdef __cplusplus
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+#endif // __STB_INCLUDE_STB_TRUETYPE_H__
|
|
|
+
|
|
|
+///////////////////////////////////////////////////////////////////////////////
|
|
|
+///////////////////////////////////////////////////////////////////////////////
|
|
|
+////
|
|
|
+//// IMPLEMENTATION
|
|
|
+////
|
|
|
+////
|
|
|
+
|
|
|
+#ifdef STB_TRUETYPE_IMPLEMENTATION
|
|
|
+
|
|
|
+#ifndef STBTT_MAX_OVERSAMPLE
|
|
|
+#define STBTT_MAX_OVERSAMPLE 8
|
|
|
+#endif
|
|
|
+
|
|
|
+#if STBTT_MAX_OVERSAMPLE > 255
|
|
|
+#error "STBTT_MAX_OVERSAMPLE cannot be > 255"
|
|
|
+#endif
|
|
|
+
|
|
|
+typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1];
|
|
|
+
|
|
|
+#ifndef STBTT_RASTERIZER_VERSION
|
|
|
+#define STBTT_RASTERIZER_VERSION 2
|
|
|
+#endif
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// accessors to parse data from file
|
|
|
+//
|
|
|
+
|
|
|
+// on platforms that don't allow misaligned reads, if we want to allow
|
|
|
+// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE
|
|
|
+
|
|
|
+#define ttBYTE(p) (* (stbtt_uint8 *) (p))
|
|
|
+#define ttCHAR(p) (* (stbtt_int8 *) (p))
|
|
|
+#define ttFixed(p) ttLONG(p)
|
|
|
+
|
|
|
+#if defined(STB_TRUETYPE_BIGENDIAN) && !defined(ALLOW_UNALIGNED_TRUETYPE)
|
|
|
+
|
|
|
+ #define ttUSHORT(p) (* (stbtt_uint16 *) (p))
|
|
|
+ #define ttSHORT(p) (* (stbtt_int16 *) (p))
|
|
|
+ #define ttULONG(p) (* (stbtt_uint32 *) (p))
|
|
|
+ #define ttLONG(p) (* (stbtt_int32 *) (p))
|
|
|
+
|
|
|
+#else
|
|
|
+
|
|
|
+ static stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
|
|
|
+ static stbtt_int16 ttSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
|
|
|
+ static stbtt_uint32 ttULONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
|
|
|
+ static stbtt_int32 ttLONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3))
|
|
|
+#define stbtt_tag(p,str) stbtt_tag4(p,str[0],str[1],str[2],str[3])
|
|
|
+
|
|
|
+static int stbtt__isfont(const stbtt_uint8 *font)
|
|
|
+{
|
|
|
+ // check the version number
|
|
|
+ if (stbtt_tag4(font, '1',0,0,0)) return 1; // TrueType 1
|
|
|
+ if (stbtt_tag(font, "typ1")) return 1; // TrueType with type 1 font -- we don't support this!
|
|
|
+ if (stbtt_tag(font, "OTTO")) return 1; // OpenType with CFF
|
|
|
+ if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+// @OPTIMIZE: binary search
|
|
|
+static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag)
|
|
|
+{
|
|
|
+ stbtt_int32 num_tables = ttUSHORT(data+fontstart+4);
|
|
|
+ stbtt_uint32 tabledir = fontstart + 12;
|
|
|
+ stbtt_int32 i;
|
|
|
+ for (i=0; i < num_tables; ++i) {
|
|
|
+ stbtt_uint32 loc = tabledir + 16*i;
|
|
|
+ if (stbtt_tag(data+loc+0, tag))
|
|
|
+ return ttULONG(data+loc+8);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)
|
|
|
+{
|
|
|
+ // if it's just a font, there's only one valid index
|
|
|
+ if (stbtt__isfont(font_collection))
|
|
|
+ return index == 0 ? 0 : -1;
|
|
|
+
|
|
|
+ // check if it's a TTC
|
|
|
+ if (stbtt_tag(font_collection, "ttcf")) {
|
|
|
+ // version 1?
|
|
|
+ if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
|
|
|
+ stbtt_int32 n = ttLONG(font_collection+8);
|
|
|
+ if (index >= n)
|
|
|
+ return -1;
|
|
|
+ return ttULONG(font_collection+12+index*4);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return -1;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)
|
|
|
+{
|
|
|
+ stbtt_uint8 *data = (stbtt_uint8 *) data2;
|
|
|
+ stbtt_uint32 cmap, t;
|
|
|
+ stbtt_int32 i,numTables;
|
|
|
+
|
|
|
+ info->data = data;
|
|
|
+ info->fontstart = fontstart;
|
|
|
+
|
|
|
+ cmap = stbtt__find_table(data, fontstart, "cmap"); // required
|
|
|
+ info->loca = stbtt__find_table(data, fontstart, "loca"); // required
|
|
|
+ info->head = stbtt__find_table(data, fontstart, "head"); // required
|
|
|
+ info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required
|
|
|
+ info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required
|
|
|
+ info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required
|
|
|
+ info->kern = stbtt__find_table(data, fontstart, "kern"); // not required
|
|
|
+ if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ t = stbtt__find_table(data, fontstart, "maxp");
|
|
|
+ if (t)
|
|
|
+ info->numGlyphs = ttUSHORT(data+t+4);
|
|
|
+ else
|
|
|
+ info->numGlyphs = 0xffff;
|
|
|
+
|
|
|
+ // find a cmap encoding table we understand *now* to avoid searching
|
|
|
+ // later. (todo: could make this installable)
|
|
|
+ // the same regardless of glyph.
|
|
|
+ numTables = ttUSHORT(data + cmap + 2);
|
|
|
+ info->index_map = 0;
|
|
|
+ for (i=0; i < numTables; ++i) {
|
|
|
+ stbtt_uint32 encoding_record = cmap + 4 + 8 * i;
|
|
|
+ // find an encoding we understand:
|
|
|
+ switch(ttUSHORT(data+encoding_record)) {
|
|
|
+ case STBTT_PLATFORM_ID_MICROSOFT:
|
|
|
+ switch (ttUSHORT(data+encoding_record+2)) {
|
|
|
+ case STBTT_MS_EID_UNICODE_BMP:
|
|
|
+ case STBTT_MS_EID_UNICODE_FULL:
|
|
|
+ // MS/Unicode
|
|
|
+ info->index_map = cmap + ttULONG(data+encoding_record+4);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case STBTT_PLATFORM_ID_UNICODE:
|
|
|
+ // Mac/iOS has these
|
|
|
+ // all the encodingIDs are unicode, so we don't bother to check it
|
|
|
+ info->index_map = cmap + ttULONG(data+encoding_record+4);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (info->index_map == 0)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ info->indexToLocFormat = ttUSHORT(data+info->head + 50);
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
|
|
|
+{
|
|
|
+ stbtt_uint8 *data = info->data;
|
|
|
+ stbtt_uint32 index_map = info->index_map;
|
|
|
+
|
|
|
+ stbtt_uint16 format = ttUSHORT(data + index_map + 0);
|
|
|
+ if (format == 0) { // apple byte encoding
|
|
|
+ stbtt_int32 bytes = ttUSHORT(data + index_map + 2);
|
|
|
+ if (unicode_codepoint < bytes-6)
|
|
|
+ return ttBYTE(data + index_map + 6 + unicode_codepoint);
|
|
|
+ return 0;
|
|
|
+ } else if (format == 6) {
|
|
|
+ stbtt_uint32 first = ttUSHORT(data + index_map + 6);
|
|
|
+ stbtt_uint32 count = ttUSHORT(data + index_map + 8);
|
|
|
+ if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count)
|
|
|
+ return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2);
|
|
|
+ return 0;
|
|
|
+ } else if (format == 2) {
|
|
|
+ STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean
|
|
|
+ return 0;
|
|
|
+ } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges
|
|
|
+ stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1;
|
|
|
+ stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;
|
|
|
+ stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);
|
|
|
+ stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;
|
|
|
+
|
|
|
+ // do a binary search of the segments
|
|
|
+ stbtt_uint32 endCount = index_map + 14;
|
|
|
+ stbtt_uint32 search = endCount;
|
|
|
+
|
|
|
+ if (unicode_codepoint > 0xffff)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ // they lie from endCount .. endCount + segCount
|
|
|
+ // but searchRange is the nearest power of two, so...
|
|
|
+ if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2))
|
|
|
+ search += rangeShift*2;
|
|
|
+
|
|
|
+ // now decrement to bias correctly to find smallest
|
|
|
+ search -= 2;
|
|
|
+ while (entrySelector) {
|
|
|
+ stbtt_uint16 end;
|
|
|
+ searchRange >>= 1;
|
|
|
+ end = ttUSHORT(data + search + searchRange*2);
|
|
|
+ if (unicode_codepoint > end)
|
|
|
+ search += searchRange*2;
|
|
|
+ --entrySelector;
|
|
|
+ }
|
|
|
+ search += 2;
|
|
|
+
|
|
|
+ {
|
|
|
+ stbtt_uint16 offset, start;
|
|
|
+ stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1);
|
|
|
+
|
|
|
+ STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
|
|
|
+ start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
|
|
|
+ if (unicode_codepoint < start)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
|
|
|
+ if (offset == 0)
|
|
|
+ return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
|
|
|
+
|
|
|
+ return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
|
|
|
+ }
|
|
|
+ } else if (format == 12 || format == 13) {
|
|
|
+ stbtt_uint32 ngroups = ttULONG(data+index_map+12);
|
|
|
+ stbtt_int32 low,high;
|
|
|
+ low = 0; high = (stbtt_int32)ngroups;
|
|
|
+ // Binary search the right group.
|
|
|
+ while (low < high) {
|
|
|
+ stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high
|
|
|
+ stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12);
|
|
|
+ stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4);
|
|
|
+ if ((stbtt_uint32) unicode_codepoint < start_char)
|
|
|
+ high = mid;
|
|
|
+ else if ((stbtt_uint32) unicode_codepoint > end_char)
|
|
|
+ low = mid+1;
|
|
|
+ else {
|
|
|
+ stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8);
|
|
|
+ if (format == 12)
|
|
|
+ return start_glyph + unicode_codepoint-start_char;
|
|
|
+ else // format == 13
|
|
|
+ return start_glyph;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return 0; // not found
|
|
|
+ }
|
|
|
+ // @TODO
|
|
|
+ STBTT_assert(0);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
|
|
|
+{
|
|
|
+ return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy)
|
|
|
+{
|
|
|
+ v->type = type;
|
|
|
+ v->x = (stbtt_int16) x;
|
|
|
+ v->y = (stbtt_int16) y;
|
|
|
+ v->cx = (stbtt_int16) cx;
|
|
|
+ v->cy = (stbtt_int16) cy;
|
|
|
+}
|
|
|
+
|
|
|
+static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
|
|
|
+{
|
|
|
+ int g1,g2;
|
|
|
+
|
|
|
+ if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range
|
|
|
+ if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format
|
|
|
+
|
|
|
+ if (info->indexToLocFormat == 0) {
|
|
|
+ g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2;
|
|
|
+ g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2;
|
|
|
+ } else {
|
|
|
+ g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4);
|
|
|
+ g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4);
|
|
|
+ }
|
|
|
+
|
|
|
+ return g1==g2 ? -1 : g1; // if length is 0, return -1
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
|
|
|
+{
|
|
|
+ int g = stbtt__GetGlyfOffset(info, glyph_index);
|
|
|
+ if (g < 0) return 0;
|
|
|
+
|
|
|
+ if (x0) *x0 = ttSHORT(info->data + g + 2);
|
|
|
+ if (y0) *y0 = ttSHORT(info->data + g + 4);
|
|
|
+ if (x1) *x1 = ttSHORT(info->data + g + 6);
|
|
|
+ if (y1) *y1 = ttSHORT(info->data + g + 8);
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
|
|
|
+{
|
|
|
+ return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
|
|
|
+{
|
|
|
+ stbtt_int16 numberOfContours;
|
|
|
+ int g = stbtt__GetGlyfOffset(info, glyph_index);
|
|
|
+ if (g < 0) return 1;
|
|
|
+ numberOfContours = ttSHORT(info->data + g);
|
|
|
+ return numberOfContours == 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off,
|
|
|
+ stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy)
|
|
|
+{
|
|
|
+ if (start_off) {
|
|
|
+ if (was_off)
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy);
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy);
|
|
|
+ } else {
|
|
|
+ if (was_off)
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy);
|
|
|
+ else
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0);
|
|
|
+ }
|
|
|
+ return num_vertices;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
|
|
|
+{
|
|
|
+ stbtt_int16 numberOfContours;
|
|
|
+ stbtt_uint8 *endPtsOfContours;
|
|
|
+ stbtt_uint8 *data = info->data;
|
|
|
+ stbtt_vertex *vertices=0;
|
|
|
+ int num_vertices=0;
|
|
|
+ int g = stbtt__GetGlyfOffset(info, glyph_index);
|
|
|
+
|
|
|
+ *pvertices = NULL;
|
|
|
+
|
|
|
+ if (g < 0) return 0;
|
|
|
+
|
|
|
+ numberOfContours = ttSHORT(data + g);
|
|
|
+
|
|
|
+ if (numberOfContours > 0) {
|
|
|
+ stbtt_uint8 flags=0,flagcount;
|
|
|
+ stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0;
|
|
|
+ stbtt_int32 x,y,cx,cy,sx,sy, scx,scy;
|
|
|
+ stbtt_uint8 *points;
|
|
|
+ endPtsOfContours = (data + g + 10);
|
|
|
+ ins = ttUSHORT(data + g + 10 + numberOfContours * 2);
|
|
|
+ points = data + g + 10 + numberOfContours * 2 + 2 + ins;
|
|
|
+
|
|
|
+ n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2);
|
|
|
+
|
|
|
+ m = n + 2*numberOfContours; // a loose bound on how many vertices we might need
|
|
|
+ vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata);
|
|
|
+ if (vertices == 0)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ next_move = 0;
|
|
|
+ flagcount=0;
|
|
|
+
|
|
|
+ // in first pass, we load uninterpreted data into the allocated array
|
|
|
+ // above, shifted to the end of the array so we won't overwrite it when
|
|
|
+ // we create our final data starting from the front
|
|
|
+
|
|
|
+ off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated
|
|
|
+
|
|
|
+ // first load flags
|
|
|
+
|
|
|
+ for (i=0; i < n; ++i) {
|
|
|
+ if (flagcount == 0) {
|
|
|
+ flags = *points++;
|
|
|
+ if (flags & 8)
|
|
|
+ flagcount = *points++;
|
|
|
+ } else
|
|
|
+ --flagcount;
|
|
|
+ vertices[off+i].type = flags;
|
|
|
+ }
|
|
|
+
|
|
|
+ // now load x coordinates
|
|
|
+ x=0;
|
|
|
+ for (i=0; i < n; ++i) {
|
|
|
+ flags = vertices[off+i].type;
|
|
|
+ if (flags & 2) {
|
|
|
+ stbtt_int16 dx = *points++;
|
|
|
+ x += (flags & 16) ? dx : -dx; // ???
|
|
|
+ } else {
|
|
|
+ if (!(flags & 16)) {
|
|
|
+ x = x + (stbtt_int16) (points[0]*256 + points[1]);
|
|
|
+ points += 2;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ vertices[off+i].x = (stbtt_int16) x;
|
|
|
+ }
|
|
|
+
|
|
|
+ // now load y coordinates
|
|
|
+ y=0;
|
|
|
+ for (i=0; i < n; ++i) {
|
|
|
+ flags = vertices[off+i].type;
|
|
|
+ if (flags & 4) {
|
|
|
+ stbtt_int16 dy = *points++;
|
|
|
+ y += (flags & 32) ? dy : -dy; // ???
|
|
|
+ } else {
|
|
|
+ if (!(flags & 32)) {
|
|
|
+ y = y + (stbtt_int16) (points[0]*256 + points[1]);
|
|
|
+ points += 2;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ vertices[off+i].y = (stbtt_int16) y;
|
|
|
+ }
|
|
|
+
|
|
|
+ // now convert them to our format
|
|
|
+ num_vertices=0;
|
|
|
+ sx = sy = cx = cy = scx = scy = 0;
|
|
|
+ for (i=0; i < n; ++i) {
|
|
|
+ flags = vertices[off+i].type;
|
|
|
+ x = (stbtt_int16) vertices[off+i].x;
|
|
|
+ y = (stbtt_int16) vertices[off+i].y;
|
|
|
+
|
|
|
+ if (next_move == i) {
|
|
|
+ if (i != 0)
|
|
|
+ num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
|
|
|
+
|
|
|
+ // now start the new one
|
|
|
+ start_off = !(flags & 1);
|
|
|
+ if (start_off) {
|
|
|
+ // if we start off with an off-curve point, then when we need to find a point on the curve
|
|
|
+ // where we can start, and we need to save some state for when we wraparound.
|
|
|
+ scx = x;
|
|
|
+ scy = y;
|
|
|
+ if (!(vertices[off+i+1].type & 1)) {
|
|
|
+ // next point is also a curve point, so interpolate an on-point curve
|
|
|
+ sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1;
|
|
|
+ sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1;
|
|
|
+ } else {
|
|
|
+ // otherwise just use the next point as our start point
|
|
|
+ sx = (stbtt_int32) vertices[off+i+1].x;
|
|
|
+ sy = (stbtt_int32) vertices[off+i+1].y;
|
|
|
+ ++i; // we're using point i+1 as the starting point, so skip it
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ sx = x;
|
|
|
+ sy = y;
|
|
|
+ }
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0);
|
|
|
+ was_off = 0;
|
|
|
+ next_move = 1 + ttUSHORT(endPtsOfContours+j*2);
|
|
|
+ ++j;
|
|
|
+ } else {
|
|
|
+ if (!(flags & 1)) { // if it's a curve
|
|
|
+ if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy);
|
|
|
+ cx = x;
|
|
|
+ cy = y;
|
|
|
+ was_off = 1;
|
|
|
+ } else {
|
|
|
+ if (was_off)
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy);
|
|
|
+ else
|
|
|
+ stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0);
|
|
|
+ was_off = 0;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
|
|
|
+ } else if (numberOfContours == -1) {
|
|
|
+ // Compound shapes.
|
|
|
+ int more = 1;
|
|
|
+ stbtt_uint8 *comp = data + g + 10;
|
|
|
+ num_vertices = 0;
|
|
|
+ vertices = 0;
|
|
|
+ while (more) {
|
|
|
+ stbtt_uint16 flags, gidx;
|
|
|
+ int comp_num_verts = 0, i;
|
|
|
+ stbtt_vertex *comp_verts = 0, *tmp = 0;
|
|
|
+ float mtx[6] = {1,0,0,1,0,0}, m, n;
|
|
|
+
|
|
|
+ flags = ttSHORT(comp); comp+=2;
|
|
|
+ gidx = ttSHORT(comp); comp+=2;
|
|
|
+
|
|
|
+ if (flags & 2) { // XY values
|
|
|
+ if (flags & 1) { // shorts
|
|
|
+ mtx[4] = ttSHORT(comp); comp+=2;
|
|
|
+ mtx[5] = ttSHORT(comp); comp+=2;
|
|
|
+ } else {
|
|
|
+ mtx[4] = ttCHAR(comp); comp+=1;
|
|
|
+ mtx[5] = ttCHAR(comp); comp+=1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else {
|
|
|
+ // @TODO handle matching point
|
|
|
+ STBTT_assert(0);
|
|
|
+ }
|
|
|
+ if (flags & (1<<3)) { // WE_HAVE_A_SCALE
|
|
|
+ mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ mtx[1] = mtx[2] = 0;
|
|
|
+ } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE
|
|
|
+ mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ mtx[1] = mtx[2] = 0;
|
|
|
+ mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO
|
|
|
+ mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ mtx[1] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ mtx[2] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Find transformation scales.
|
|
|
+ m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]);
|
|
|
+ n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]);
|
|
|
+
|
|
|
+ // Get indexed glyph.
|
|
|
+ comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts);
|
|
|
+ if (comp_num_verts > 0) {
|
|
|
+ // Transform vertices.
|
|
|
+ for (i = 0; i < comp_num_verts; ++i) {
|
|
|
+ stbtt_vertex* v = &comp_verts[i];
|
|
|
+ stbtt_vertex_type x,y;
|
|
|
+ x=v->x; y=v->y;
|
|
|
+ v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
|
|
|
+ v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
|
|
|
+ x=v->cx; y=v->cy;
|
|
|
+ v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
|
|
|
+ v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
|
|
|
+ }
|
|
|
+ // Append vertices.
|
|
|
+ tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata);
|
|
|
+ if (!tmp) {
|
|
|
+ if (vertices) STBTT_free(vertices, info->userdata);
|
|
|
+ if (comp_verts) STBTT_free(comp_verts, info->userdata);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+ if (num_vertices > 0) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex));
|
|
|
+ STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex));
|
|
|
+ if (vertices) STBTT_free(vertices, info->userdata);
|
|
|
+ vertices = tmp;
|
|
|
+ STBTT_free(comp_verts, info->userdata);
|
|
|
+ num_vertices += comp_num_verts;
|
|
|
+ }
|
|
|
+ // More components ?
|
|
|
+ more = flags & (1<<5);
|
|
|
+ }
|
|
|
+ } else if (numberOfContours < 0) {
|
|
|
+ // @TODO other compound variations?
|
|
|
+ STBTT_assert(0);
|
|
|
+ } else {
|
|
|
+ // numberOfCounters == 0, do nothing
|
|
|
+ }
|
|
|
+
|
|
|
+ *pvertices = vertices;
|
|
|
+ return num_vertices;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
|
|
|
+{
|
|
|
+ stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
|
|
|
+ if (glyph_index < numOfLongHorMetrics) {
|
|
|
+ if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index);
|
|
|
+ if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2);
|
|
|
+ } else {
|
|
|
+ if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1));
|
|
|
+ if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics));
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
|
|
|
+{
|
|
|
+ stbtt_uint8 *data = info->data + info->kern;
|
|
|
+ stbtt_uint32 needle, straw;
|
|
|
+ int l, r, m;
|
|
|
+
|
|
|
+ // we only look at the first table. it must be 'horizontal' and format 0.
|
|
|
+ if (!info->kern)
|
|
|
+ return 0;
|
|
|
+ if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
|
|
|
+ return 0;
|
|
|
+ if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ l = 0;
|
|
|
+ r = ttUSHORT(data+10) - 1;
|
|
|
+ needle = glyph1 << 16 | glyph2;
|
|
|
+ while (l <= r) {
|
|
|
+ m = (l + r) >> 1;
|
|
|
+ straw = ttULONG(data+18+(m*6)); // note: unaligned read
|
|
|
+ if (needle < straw)
|
|
|
+ r = m - 1;
|
|
|
+ else if (needle > straw)
|
|
|
+ l = m + 1;
|
|
|
+ else
|
|
|
+ return ttSHORT(data+22+(m*6));
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
|
|
|
+{
|
|
|
+ if (!info->kern) // if no kerning table, don't waste time looking up both codepoint->glyphs
|
|
|
+ return 0;
|
|
|
+ return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2));
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
|
|
|
+{
|
|
|
+ stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
|
|
|
+{
|
|
|
+ if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4);
|
|
|
+ if (descent) *descent = ttSHORT(info->data+info->hhea + 6);
|
|
|
+ if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
|
|
|
+{
|
|
|
+ *x0 = ttSHORT(info->data + info->head + 36);
|
|
|
+ *y0 = ttSHORT(info->data + info->head + 38);
|
|
|
+ *x1 = ttSHORT(info->data + info->head + 40);
|
|
|
+ *y1 = ttSHORT(info->data + info->head + 42);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
|
|
|
+{
|
|
|
+ int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6);
|
|
|
+ return (float) height / fheight;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
|
|
|
+{
|
|
|
+ int unitsPerEm = ttUSHORT(info->data + info->head + 18);
|
|
|
+ return pixels / unitsPerEm;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
|
|
|
+{
|
|
|
+ STBTT_free(v, info->userdata);
|
|
|
+}
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// antialiasing software rasterizer
|
|
|
+//
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
|
|
+{
|
|
|
+ int x0,y0,x1,y1;
|
|
|
+ if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
|
|
|
+ // e.g. space character
|
|
|
+ if (ix0) *ix0 = 0;
|
|
|
+ if (iy0) *iy0 = 0;
|
|
|
+ if (ix1) *ix1 = 0;
|
|
|
+ if (iy1) *iy1 = 0;
|
|
|
+ } else {
|
|
|
+ // move to integral bboxes (treating pixels as little squares, what pixels get touched)?
|
|
|
+ if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x);
|
|
|
+ if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y);
|
|
|
+ if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x);
|
|
|
+ if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
|
|
+{
|
|
|
+ stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
|
|
+{
|
|
|
+ stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
|
|
+{
|
|
|
+ stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1);
|
|
|
+}
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// Rasterizer
|
|
|
+
|
|
|
+typedef struct stbtt__hheap_chunk
|
|
|
+{
|
|
|
+ struct stbtt__hheap_chunk *next;
|
|
|
+} stbtt__hheap_chunk;
|
|
|
+
|
|
|
+typedef struct stbtt__hheap
|
|
|
+{
|
|
|
+ struct stbtt__hheap_chunk *head;
|
|
|
+ void *first_free;
|
|
|
+ int num_remaining_in_head_chunk;
|
|
|
+} stbtt__hheap;
|
|
|
+
|
|
|
+static void *stbtt__hheap_alloc(stbtt__hheap *hh, size_t size, void *userdata)
|
|
|
+{
|
|
|
+ if (hh->first_free) {
|
|
|
+ void *p = hh->first_free;
|
|
|
+ hh->first_free = * (void **) p;
|
|
|
+ return p;
|
|
|
+ } else {
|
|
|
+ if (hh->num_remaining_in_head_chunk == 0) {
|
|
|
+ int count = (size < 32 ? 2000 : size < 128 ? 800 : 100);
|
|
|
+ stbtt__hheap_chunk *c = (stbtt__hheap_chunk *) STBTT_malloc(sizeof(stbtt__hheap_chunk) + size * count, userdata);
|
|
|
+ if (c == NULL)
|
|
|
+ return NULL;
|
|
|
+ c->next = hh->head;
|
|
|
+ hh->head = c;
|
|
|
+ hh->num_remaining_in_head_chunk = count;
|
|
|
+ }
|
|
|
+ --hh->num_remaining_in_head_chunk;
|
|
|
+ return (char *) (hh->head) + size * hh->num_remaining_in_head_chunk;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__hheap_free(stbtt__hheap *hh, void *p)
|
|
|
+{
|
|
|
+ *(void **) p = hh->first_free;
|
|
|
+ hh->first_free = p;
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__hheap_chunk *c = hh->head;
|
|
|
+ while (c) {
|
|
|
+ stbtt__hheap_chunk *n = c->next;
|
|
|
+ STBTT_free(c, userdata);
|
|
|
+ c = n;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+typedef struct stbtt__edge {
|
|
|
+ float x0,y0, x1,y1;
|
|
|
+ int invert;
|
|
|
+} stbtt__edge;
|
|
|
+
|
|
|
+
|
|
|
+typedef struct stbtt__active_edge
|
|
|
+{
|
|
|
+ struct stbtt__active_edge *next;
|
|
|
+ #if STBTT_RASTERIZER_VERSION==1
|
|
|
+ int x,dx;
|
|
|
+ float ey;
|
|
|
+ int direction;
|
|
|
+ #elif STBTT_RASTERIZER_VERSION==2
|
|
|
+ float fx,fdx,fdy;
|
|
|
+ float direction;
|
|
|
+ float sy;
|
|
|
+ float ey;
|
|
|
+ #else
|
|
|
+ #error "Unrecognized value of STBTT_RASTERIZER_VERSION"
|
|
|
+ #endif
|
|
|
+} stbtt__active_edge;
|
|
|
+
|
|
|
+#if STBTT_RASTERIZER_VERSION == 1
|
|
|
+#define STBTT_FIXSHIFT 10
|
|
|
+#define STBTT_FIX (1 << STBTT_FIXSHIFT)
|
|
|
+#define STBTT_FIXMASK (STBTT_FIX-1)
|
|
|
+
|
|
|
+static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
|
|
|
+ float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
|
|
|
+ if (!z) return z;
|
|
|
+
|
|
|
+ // round dx down to avoid overshooting
|
|
|
+ if (dxdy < 0)
|
|
|
+ z->dx = -STBTT_ifloor(STBTT_FIX * -dxdy);
|
|
|
+ else
|
|
|
+ z->dx = STBTT_ifloor(STBTT_FIX * dxdy);
|
|
|
+
|
|
|
+ z->x = STBTT_ifloor(STBTT_FIX * e->x0 + z->dx * (start_point - e->y0)); // use z->dx so when we offset later it's by the same amount
|
|
|
+ z->x -= off_x * STBTT_FIX;
|
|
|
+
|
|
|
+ z->ey = e->y1;
|
|
|
+ z->next = 0;
|
|
|
+ z->direction = e->invert ? 1 : -1;
|
|
|
+ return z;
|
|
|
+}
|
|
|
+#elif STBTT_RASTERIZER_VERSION == 2
|
|
|
+static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
|
|
|
+ float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
|
|
|
+ //STBTT_assert(e->y0 <= start_point);
|
|
|
+ if (!z) return z;
|
|
|
+ z->fdx = dxdy;
|
|
|
+ z->fdy = dxdy != 0.0f ? (1.0f/dxdy) : 0.0f;
|
|
|
+ z->fx = e->x0 + dxdy * (start_point - e->y0);
|
|
|
+ z->fx -= off_x;
|
|
|
+ z->direction = e->invert ? 1.0f : -1.0f;
|
|
|
+ z->sy = e->y0;
|
|
|
+ z->ey = e->y1;
|
|
|
+ z->next = 0;
|
|
|
+ return z;
|
|
|
+}
|
|
|
+#else
|
|
|
+#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
|
|
|
+#endif
|
|
|
+
|
|
|
+#if STBTT_RASTERIZER_VERSION == 1
|
|
|
+// note: this routine clips fills that extend off the edges... ideally this
|
|
|
+// wouldn't happen, but it could happen if the truetype glyph bounding boxes
|
|
|
+// are wrong, or if the user supplies a too-small bitmap
|
|
|
+static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight)
|
|
|
+{
|
|
|
+ // non-zero winding fill
|
|
|
+ int x0=0, w=0;
|
|
|
+
|
|
|
+ while (e) {
|
|
|
+ if (w == 0) {
|
|
|
+ // if we're currently at zero, we need to record the edge start point
|
|
|
+ x0 = e->x; w += e->direction;
|
|
|
+ } else {
|
|
|
+ int x1 = e->x; w += e->direction;
|
|
|
+ // if we went to zero, we need to draw
|
|
|
+ if (w == 0) {
|
|
|
+ int i = x0 >> STBTT_FIXSHIFT;
|
|
|
+ int j = x1 >> STBTT_FIXSHIFT;
|
|
|
+
|
|
|
+ if (i < len && j >= 0) {
|
|
|
+ if (i == j) {
|
|
|
+ // x0,x1 are the same pixel, so compute combined coverage
|
|
|
+ scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> STBTT_FIXSHIFT);
|
|
|
+ } else {
|
|
|
+ if (i >= 0) // add antialiasing for x0
|
|
|
+ scanline[i] = scanline[i] + (stbtt_uint8) (((STBTT_FIX - (x0 & STBTT_FIXMASK)) * max_weight) >> STBTT_FIXSHIFT);
|
|
|
+ else
|
|
|
+ i = -1; // clip
|
|
|
+
|
|
|
+ if (j < len) // add antialiasing for x1
|
|
|
+ scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & STBTT_FIXMASK) * max_weight) >> STBTT_FIXSHIFT);
|
|
|
+ else
|
|
|
+ j = len; // clip
|
|
|
+
|
|
|
+ for (++i; i < j; ++i) // fill pixels between x0 and x1
|
|
|
+ scanline[i] = scanline[i] + (stbtt_uint8) max_weight;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ e = e->next;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__hheap hh = { 0, 0, 0 };
|
|
|
+ stbtt__active_edge *active = NULL;
|
|
|
+ int y,j=0;
|
|
|
+ int max_weight = (255 / vsubsample); // weight per vertical scanline
|
|
|
+ int s; // vertical subsample index
|
|
|
+ unsigned char scanline_data[512], *scanline;
|
|
|
+
|
|
|
+ if (result->w > 512)
|
|
|
+ scanline = (unsigned char *) STBTT_malloc(result->w, userdata);
|
|
|
+ else
|
|
|
+ scanline = scanline_data;
|
|
|
+
|
|
|
+ y = off_y * vsubsample;
|
|
|
+ e[n].y0 = (off_y + result->h) * (float) vsubsample + 1;
|
|
|
+
|
|
|
+ while (j < result->h) {
|
|
|
+ STBTT_memset(scanline, 0, result->w);
|
|
|
+ for (s=0; s < vsubsample; ++s) {
|
|
|
+ // find center of pixel for this scanline
|
|
|
+ float scan_y = y + 0.5f;
|
|
|
+ stbtt__active_edge **step = &active;
|
|
|
+
|
|
|
+ // update all active edges;
|
|
|
+ // remove all active edges that terminate before the center of this scanline
|
|
|
+ while (*step) {
|
|
|
+ stbtt__active_edge * z = *step;
|
|
|
+ if (z->ey <= scan_y) {
|
|
|
+ *step = z->next; // delete from list
|
|
|
+ STBTT_assert(z->direction);
|
|
|
+ z->direction = 0;
|
|
|
+ stbtt__hheap_free(&hh, z);
|
|
|
+ } else {
|
|
|
+ z->x += z->dx; // advance to position for current scanline
|
|
|
+ step = &((*step)->next); // advance through list
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // resort the list if needed
|
|
|
+ for(;;) {
|
|
|
+ int changed=0;
|
|
|
+ step = &active;
|
|
|
+ while (*step && (*step)->next) {
|
|
|
+ if ((*step)->x > (*step)->next->x) {
|
|
|
+ stbtt__active_edge *t = *step;
|
|
|
+ stbtt__active_edge *q = t->next;
|
|
|
+
|
|
|
+ t->next = q->next;
|
|
|
+ q->next = t;
|
|
|
+ *step = q;
|
|
|
+ changed = 1;
|
|
|
+ }
|
|
|
+ step = &(*step)->next;
|
|
|
+ }
|
|
|
+ if (!changed) break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
|
|
|
+ while (e->y0 <= scan_y) {
|
|
|
+ if (e->y1 > scan_y) {
|
|
|
+ stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata);
|
|
|
+ // find insertion point
|
|
|
+ if (active == NULL)
|
|
|
+ active = z;
|
|
|
+ else if (z->x < active->x) {
|
|
|
+ // insert at front
|
|
|
+ z->next = active;
|
|
|
+ active = z;
|
|
|
+ } else {
|
|
|
+ // find thing to insert AFTER
|
|
|
+ stbtt__active_edge *p = active;
|
|
|
+ while (p->next && p->next->x < z->x)
|
|
|
+ p = p->next;
|
|
|
+ // at this point, p->next->x is NOT < z->x
|
|
|
+ z->next = p->next;
|
|
|
+ p->next = z;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ ++e;
|
|
|
+ }
|
|
|
+
|
|
|
+ // now process all active edges in XOR fashion
|
|
|
+ if (active)
|
|
|
+ stbtt__fill_active_edges(scanline, result->w, active, max_weight);
|
|
|
+
|
|
|
+ ++y;
|
|
|
+ }
|
|
|
+ STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w);
|
|
|
+ ++j;
|
|
|
+ }
|
|
|
+
|
|
|
+ stbtt__hheap_cleanup(&hh, userdata);
|
|
|
+
|
|
|
+ if (scanline != scanline_data)
|
|
|
+ STBTT_free(scanline, userdata);
|
|
|
+}
|
|
|
+
|
|
|
+#elif STBTT_RASTERIZER_VERSION == 2
|
|
|
+
|
|
|
+// the edge passed in here does not cross the vertical line at x or the vertical line at x+1
|
|
|
+// (i.e. it has already been clipped to those)
|
|
|
+static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1)
|
|
|
+{
|
|
|
+ if (y0 == y1) return;
|
|
|
+ STBTT_assert(y0 < y1);
|
|
|
+ STBTT_assert(e->sy <= e->ey);
|
|
|
+ if (y0 > e->ey) return;
|
|
|
+ if (y1 < e->sy) return;
|
|
|
+ if (y0 < e->sy) {
|
|
|
+ x0 += (x1-x0) * (e->sy - y0) / (y1-y0);
|
|
|
+ y0 = e->sy;
|
|
|
+ }
|
|
|
+ if (y1 > e->ey) {
|
|
|
+ x1 += (x1-x0) * (e->ey - y1) / (y1-y0);
|
|
|
+ y1 = e->ey;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (x0 == x)
|
|
|
+ STBTT_assert(x1 <= x+1);
|
|
|
+ else if (x0 == x+1)
|
|
|
+ STBTT_assert(x1 >= x);
|
|
|
+ else if (x0 <= x)
|
|
|
+ STBTT_assert(x1 <= x);
|
|
|
+ else if (x0 >= x+1)
|
|
|
+ STBTT_assert(x1 >= x+1);
|
|
|
+ else
|
|
|
+ STBTT_assert(x1 >= x && x1 <= x+1);
|
|
|
+
|
|
|
+ if (x0 <= x && x1 <= x)
|
|
|
+ scanline[x] += e->direction * (y1-y0);
|
|
|
+ else if (x0 >= x+1 && x1 >= x+1)
|
|
|
+ ;
|
|
|
+ else {
|
|
|
+ STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1);
|
|
|
+ scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, int len, stbtt__active_edge *e, float y_top)
|
|
|
+{
|
|
|
+ float y_bottom = y_top+1;
|
|
|
+
|
|
|
+ while (e) {
|
|
|
+ // brute force every pixel
|
|
|
+
|
|
|
+ // compute intersection points with top & bottom
|
|
|
+ STBTT_assert(e->ey >= y_top);
|
|
|
+
|
|
|
+ if (e->fdx == 0) {
|
|
|
+ float x0 = e->fx;
|
|
|
+ if (x0 < len) {
|
|
|
+ if (x0 >= 0) {
|
|
|
+ stbtt__handle_clipped_edge(scanline,(int) x0,e, x0,y_top, x0,y_bottom);
|
|
|
+ stbtt__handle_clipped_edge(scanline_fill-1,(int) x0+1,e, x0,y_top, x0,y_bottom);
|
|
|
+ } else {
|
|
|
+ stbtt__handle_clipped_edge(scanline_fill-1,0,e, x0,y_top, x0,y_bottom);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ float x0 = e->fx;
|
|
|
+ float dx = e->fdx;
|
|
|
+ float xb = x0 + dx;
|
|
|
+ float x_top, x_bottom;
|
|
|
+ float sy0,sy1;
|
|
|
+ float dy = e->fdy;
|
|
|
+ STBTT_assert(e->sy <= y_bottom && e->ey >= y_top);
|
|
|
+
|
|
|
+ // compute endpoints of line segment clipped to this scanline (if the
|
|
|
+ // line segment starts on this scanline. x0 is the intersection of the
|
|
|
+ // line with y_top, but that may be off the line segment.
|
|
|
+ if (e->sy > y_top) {
|
|
|
+ x_top = x0 + dx * (e->sy - y_top);
|
|
|
+ sy0 = e->sy;
|
|
|
+ } else {
|
|
|
+ x_top = x0;
|
|
|
+ sy0 = y_top;
|
|
|
+ }
|
|
|
+ if (e->ey < y_bottom) {
|
|
|
+ x_bottom = x0 + dx * (e->ey - y_top);
|
|
|
+ sy1 = e->ey;
|
|
|
+ } else {
|
|
|
+ x_bottom = xb;
|
|
|
+ sy1 = y_bottom;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (x_top >= 0 && x_bottom >= 0 && x_top < len && x_bottom < len) {
|
|
|
+ // from here on, we don't have to range check x values
|
|
|
+
|
|
|
+ if ((int) x_top == (int) x_bottom) {
|
|
|
+ float height;
|
|
|
+ // simple case, only spans one pixel
|
|
|
+ int x = (int) x_top;
|
|
|
+ height = sy1 - sy0;
|
|
|
+ STBTT_assert(x >= 0 && x < len);
|
|
|
+ scanline[x] += e->direction * (1-((x_top - x) + (x_bottom-x))/2) * height;
|
|
|
+ scanline_fill[x] += e->direction * height; // everything right of this pixel is filled
|
|
|
+ } else {
|
|
|
+ int x,x1,x2;
|
|
|
+ float y_crossing, step, sign, area;
|
|
|
+ // covers 2+ pixels
|
|
|
+ if (x_top > x_bottom) {
|
|
|
+ // flip scanline vertically; signed area is the same
|
|
|
+ float t;
|
|
|
+ sy0 = y_bottom - (sy0 - y_top);
|
|
|
+ sy1 = y_bottom - (sy1 - y_top);
|
|
|
+ t = sy0, sy0 = sy1, sy1 = t;
|
|
|
+ t = x_bottom, x_bottom = x_top, x_top = t;
|
|
|
+ dx = -dx;
|
|
|
+ dy = -dy;
|
|
|
+ t = x0, x0 = xb, xb = t;
|
|
|
+ }
|
|
|
+
|
|
|
+ x1 = (int) x_top;
|
|
|
+ x2 = (int) x_bottom;
|
|
|
+ // compute intersection with y axis at x1+1
|
|
|
+ y_crossing = (x1+1 - x0) * dy + y_top;
|
|
|
+
|
|
|
+ sign = e->direction;
|
|
|
+ // area of the rectangle covered from y0..y_crossing
|
|
|
+ area = sign * (y_crossing-sy0);
|
|
|
+ // area of the triangle (x_top,y0), (x+1,y0), (x+1,y_crossing)
|
|
|
+ scanline[x1] += area * (1-((x_top - x1)+(x1+1-x1))/2);
|
|
|
+
|
|
|
+ step = sign * dy;
|
|
|
+ for (x = x1+1; x < x2; ++x) {
|
|
|
+ scanline[x] += area + step/2;
|
|
|
+ area += step;
|
|
|
+ }
|
|
|
+ y_crossing += dy * (x2 - (x1+1));
|
|
|
+
|
|
|
+ STBTT_assert(fabs(area) <= 1.01f);
|
|
|
+
|
|
|
+ scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (sy1-y_crossing);
|
|
|
+
|
|
|
+ scanline_fill[x2] += sign * (sy1-sy0);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // if edge goes outside of box we're drawing, we require
|
|
|
+ // clipping logic. since this does not match the intended use
|
|
|
+ // of this library, we use a different, very slow brute
|
|
|
+ // force implementation
|
|
|
+ int x;
|
|
|
+ for (x=0; x < len; ++x) {
|
|
|
+ // cases:
|
|
|
+ //
|
|
|
+ // there can be up to two intersections with the pixel. any intersection
|
|
|
+ // with left or right edges can be handled by splitting into two (or three)
|
|
|
+ // regions. intersections with top & bottom do not necessitate case-wise logic.
|
|
|
+ //
|
|
|
+ // the old way of doing this found the intersections with the left & right edges,
|
|
|
+ // then used some simple logic to produce up to three segments in sorted order
|
|
|
+ // from top-to-bottom. however, this had a problem: if an x edge was epsilon
|
|
|
+ // across the x border, then the corresponding y position might not be distinct
|
|
|
+ // from the other y segment, and it might ignored as an empty segment. to avoid
|
|
|
+ // that, we need to explicitly produce segments based on x positions.
|
|
|
+
|
|
|
+ // rename variables to clear pairs
|
|
|
+ float y0 = y_top;
|
|
|
+ float x1 = (float) (x);
|
|
|
+ float x2 = (float) (x+1);
|
|
|
+ float x3 = xb;
|
|
|
+ float y3 = y_bottom;
|
|
|
+ float y1,y2;
|
|
|
+
|
|
|
+ // x = e->x + e->dx * (y-y_top)
|
|
|
+ // (y-y_top) = (x - e->x) / e->dx
|
|
|
+ // y = (x - e->x) / e->dx + y_top
|
|
|
+ y1 = (x - x0) / dx + y_top;
|
|
|
+ y2 = (x+1 - x0) / dx + y_top;
|
|
|
+
|
|
|
+ if (x0 < x1 && x3 > x2) { // three segments descending down-right
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
|
|
|
+ } else if (x3 < x1 && x0 > x2) { // three segments descending down-left
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
|
|
|
+ } else if (x0 < x1 && x3 > x1) { // two segments across x, down-right
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
|
|
|
+ } else if (x3 < x1 && x0 > x1) { // two segments across x, down-left
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
|
|
|
+ } else if (x0 < x2 && x3 > x2) { // two segments across x+1, down-right
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
|
|
|
+ } else if (x3 < x2 && x0 > x2) { // two segments across x+1, down-left
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
|
|
|
+ } else { // one segment
|
|
|
+ stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ e = e->next;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+// directly AA rasterize edges w/o supersampling
|
|
|
+static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__hheap hh = { 0, 0, 0 };
|
|
|
+ stbtt__active_edge *active = NULL;
|
|
|
+ int y,j=0, i;
|
|
|
+ float scanline_data[129], *scanline, *scanline2;
|
|
|
+
|
|
|
+ if (result->w > 64)
|
|
|
+ scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata);
|
|
|
+ else
|
|
|
+ scanline = scanline_data;
|
|
|
+
|
|
|
+ scanline2 = scanline + result->w;
|
|
|
+
|
|
|
+ y = off_y;
|
|
|
+ e[n].y0 = (float) (off_y + result->h) + 1;
|
|
|
+
|
|
|
+ while (j < result->h) {
|
|
|
+ // find center of pixel for this scanline
|
|
|
+ float scan_y_top = y + 0.0f;
|
|
|
+ float scan_y_bottom = y + 1.0f;
|
|
|
+ stbtt__active_edge **step = &active;
|
|
|
+
|
|
|
+ STBTT_memset(scanline , 0, result->w*sizeof(scanline[0]));
|
|
|
+ STBTT_memset(scanline2, 0, (result->w+1)*sizeof(scanline[0]));
|
|
|
+
|
|
|
+ // update all active edges;
|
|
|
+ // remove all active edges that terminate before the top of this scanline
|
|
|
+ while (*step) {
|
|
|
+ stbtt__active_edge * z = *step;
|
|
|
+ if (z->ey <= scan_y_top) {
|
|
|
+ *step = z->next; // delete from list
|
|
|
+ STBTT_assert(z->direction);
|
|
|
+ z->direction = 0;
|
|
|
+ stbtt__hheap_free(&hh, z);
|
|
|
+ } else {
|
|
|
+ step = &((*step)->next); // advance through list
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // insert all edges that start before the bottom of this scanline
|
|
|
+ while (e->y0 <= scan_y_bottom) {
|
|
|
+ if (e->y0 != e->y1) {
|
|
|
+ stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
|
|
|
+ STBTT_assert(z->ey >= scan_y_top);
|
|
|
+ // insert at front
|
|
|
+ z->next = active;
|
|
|
+ active = z;
|
|
|
+ }
|
|
|
+ ++e;
|
|
|
+ }
|
|
|
+
|
|
|
+ // now process all active edges
|
|
|
+ if (active)
|
|
|
+ stbtt__fill_active_edges_new(scanline, scanline2+1, result->w, active, scan_y_top);
|
|
|
+
|
|
|
+ {
|
|
|
+ float sum = 0;
|
|
|
+ for (i=0; i < result->w; ++i) {
|
|
|
+ float k;
|
|
|
+ int m;
|
|
|
+ sum += scanline2[i];
|
|
|
+ k = scanline[i] + sum;
|
|
|
+ k = (float) fabs(k)*255 + 0.5f;
|
|
|
+ m = (int) k;
|
|
|
+ if (m > 255) m = 255;
|
|
|
+ result->pixels[j*result->stride + i] = (unsigned char) m;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // advance all the edges
|
|
|
+ step = &active;
|
|
|
+ while (*step) {
|
|
|
+ stbtt__active_edge *z = *step;
|
|
|
+ z->fx += z->fdx; // advance to position for current scanline
|
|
|
+ step = &((*step)->next); // advance through list
|
|
|
+ }
|
|
|
+
|
|
|
+ ++y;
|
|
|
+ ++j;
|
|
|
+ }
|
|
|
+
|
|
|
+ stbtt__hheap_cleanup(&hh, userdata);
|
|
|
+
|
|
|
+ if (scanline != scanline_data)
|
|
|
+ STBTT_free(scanline, userdata);
|
|
|
+}
|
|
|
+#else
|
|
|
+#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
|
|
|
+#endif
|
|
|
+
|
|
|
+#define STBTT__COMPARE(a,b) ((a)->y0 < (b)->y0)
|
|
|
+
|
|
|
+static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n)
|
|
|
+{
|
|
|
+ int i,j;
|
|
|
+ for (i=1; i < n; ++i) {
|
|
|
+ stbtt__edge t = p[i], *a = &t;
|
|
|
+ j = i;
|
|
|
+ while (j > 0) {
|
|
|
+ stbtt__edge *b = &p[j-1];
|
|
|
+ int c = STBTT__COMPARE(a,b);
|
|
|
+ if (!c) break;
|
|
|
+ p[j] = p[j-1];
|
|
|
+ --j;
|
|
|
+ }
|
|
|
+ if (i != j)
|
|
|
+ p[j] = t;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n)
|
|
|
+{
|
|
|
+ /* threshhold for transitioning to insertion sort */
|
|
|
+ while (n > 12) {
|
|
|
+ stbtt__edge t;
|
|
|
+ int c01,c12,c,m,i,j;
|
|
|
+
|
|
|
+ /* compute median of three */
|
|
|
+ m = n >> 1;
|
|
|
+ c01 = STBTT__COMPARE(&p[0],&p[m]);
|
|
|
+ c12 = STBTT__COMPARE(&p[m],&p[n-1]);
|
|
|
+ /* if 0 >= mid >= end, or 0 < mid < end, then use mid */
|
|
|
+ if (c01 != c12) {
|
|
|
+ /* otherwise, we'll need to swap something else to middle */
|
|
|
+ int z;
|
|
|
+ c = STBTT__COMPARE(&p[0],&p[n-1]);
|
|
|
+ /* 0>mid && mid<n: 0>n => n; 0<n => 0 */
|
|
|
+ /* 0<mid && mid>n: 0>n => 0; 0<n => n */
|
|
|
+ z = (c == c12) ? 0 : n-1;
|
|
|
+ t = p[z];
|
|
|
+ p[z] = p[m];
|
|
|
+ p[m] = t;
|
|
|
+ }
|
|
|
+ /* now p[m] is the median-of-three */
|
|
|
+ /* swap it to the beginning so it won't move around */
|
|
|
+ t = p[0];
|
|
|
+ p[0] = p[m];
|
|
|
+ p[m] = t;
|
|
|
+
|
|
|
+ /* partition loop */
|
|
|
+ i=1;
|
|
|
+ j=n-1;
|
|
|
+ for(;;) {
|
|
|
+ /* handling of equality is crucial here */
|
|
|
+ /* for sentinels & efficiency with duplicates */
|
|
|
+ for (;;++i) {
|
|
|
+ if (!STBTT__COMPARE(&p[i], &p[0])) break;
|
|
|
+ }
|
|
|
+ for (;;--j) {
|
|
|
+ if (!STBTT__COMPARE(&p[0], &p[j])) break;
|
|
|
+ }
|
|
|
+ /* make sure we haven't crossed */
|
|
|
+ if (i >= j) break;
|
|
|
+ t = p[i];
|
|
|
+ p[i] = p[j];
|
|
|
+ p[j] = t;
|
|
|
+
|
|
|
+ ++i;
|
|
|
+ --j;
|
|
|
+ }
|
|
|
+ /* recurse on smaller side, iterate on larger */
|
|
|
+ if (j < (n-i)) {
|
|
|
+ stbtt__sort_edges_quicksort(p,j);
|
|
|
+ p = p+i;
|
|
|
+ n = n-i;
|
|
|
+ } else {
|
|
|
+ stbtt__sort_edges_quicksort(p+i, n-i);
|
|
|
+ n = j;
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__sort_edges(stbtt__edge *p, int n)
|
|
|
+{
|
|
|
+ stbtt__sort_edges_quicksort(p, n);
|
|
|
+ stbtt__sort_edges_ins_sort(p, n);
|
|
|
+}
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ float x,y;
|
|
|
+} stbtt__point;
|
|
|
+
|
|
|
+static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata)
|
|
|
+{
|
|
|
+ float y_scale_inv = invert ? -scale_y : scale_y;
|
|
|
+ stbtt__edge *e;
|
|
|
+ int n,i,j,k,m;
|
|
|
+#if STBTT_RASTERIZER_VERSION == 1
|
|
|
+ int vsubsample = result->h < 8 ? 15 : 5;
|
|
|
+#elif STBTT_RASTERIZER_VERSION == 2
|
|
|
+ int vsubsample = 1;
|
|
|
+#else
|
|
|
+ #error "Unrecognized value of STBTT_RASTERIZER_VERSION"
|
|
|
+#endif
|
|
|
+ // vsubsample should divide 255 evenly; otherwise we won't reach full opacity
|
|
|
+
|
|
|
+ // now we have to blow out the windings into explicit edge lists
|
|
|
+ n = 0;
|
|
|
+ for (i=0; i < windings; ++i)
|
|
|
+ n += wcount[i];
|
|
|
+
|
|
|
+ e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); // add an extra one as a sentinel
|
|
|
+ if (e == 0) return;
|
|
|
+ n = 0;
|
|
|
+
|
|
|
+ m=0;
|
|
|
+ for (i=0; i < windings; ++i) {
|
|
|
+ stbtt__point *p = pts + m;
|
|
|
+ m += wcount[i];
|
|
|
+ j = wcount[i]-1;
|
|
|
+ for (k=0; k < wcount[i]; j=k++) {
|
|
|
+ int a=k,b=j;
|
|
|
+ // skip the edge if horizontal
|
|
|
+ if (p[j].y == p[k].y)
|
|
|
+ continue;
|
|
|
+ // add edge from j to k to the list
|
|
|
+ e[n].invert = 0;
|
|
|
+ if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) {
|
|
|
+ e[n].invert = 1;
|
|
|
+ a=j,b=k;
|
|
|
+ }
|
|
|
+ e[n].x0 = p[a].x * scale_x + shift_x;
|
|
|
+ e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
|
|
|
+ e[n].x1 = p[b].x * scale_x + shift_x;
|
|
|
+ e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
|
|
|
+ ++n;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // now sort the edges by their highest point (should snap to integer, and then by x)
|
|
|
+ //STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare);
|
|
|
+ stbtt__sort_edges(e, n);
|
|
|
+
|
|
|
+ // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule
|
|
|
+ stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
|
|
|
+
|
|
|
+ STBTT_free(e, userdata);
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__add_point(stbtt__point *points, int n, float x, float y)
|
|
|
+{
|
|
|
+ if (!points) return; // during first pass, it's unallocated
|
|
|
+ points[n].x = x;
|
|
|
+ points[n].y = y;
|
|
|
+}
|
|
|
+
|
|
|
+// tesselate until threshhold p is happy... @TODO warped to compensate for non-linear stretching
|
|
|
+static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n)
|
|
|
+{
|
|
|
+ // midpoint
|
|
|
+ float mx = (x0 + 2*x1 + x2)/4;
|
|
|
+ float my = (y0 + 2*y1 + y2)/4;
|
|
|
+ // versus directly drawn line
|
|
|
+ float dx = (x0+x2)/2 - mx;
|
|
|
+ float dy = (y0+y2)/2 - my;
|
|
|
+ if (n > 16) // 65536 segments on one curve better be enough!
|
|
|
+ return 1;
|
|
|
+ if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA
|
|
|
+ stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1);
|
|
|
+ stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1);
|
|
|
+ } else {
|
|
|
+ stbtt__add_point(points, *num_points,x2,y2);
|
|
|
+ *num_points = *num_points+1;
|
|
|
+ }
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+// returns number of contours
|
|
|
+static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
|
|
|
+{
|
|
|
+ stbtt__point *points=0;
|
|
|
+ int num_points=0;
|
|
|
+
|
|
|
+ float objspace_flatness_squared = objspace_flatness * objspace_flatness;
|
|
|
+ int i,n=0,start=0, pass;
|
|
|
+
|
|
|
+ // count how many "moves" there are to get the contour count
|
|
|
+ for (i=0; i < num_verts; ++i)
|
|
|
+ if (vertices[i].type == STBTT_vmove)
|
|
|
+ ++n;
|
|
|
+
|
|
|
+ *num_contours = n;
|
|
|
+ if (n == 0) return 0;
|
|
|
+
|
|
|
+ *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata);
|
|
|
+
|
|
|
+ if (*contour_lengths == 0) {
|
|
|
+ *num_contours = 0;
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ // make two passes through the points so we don't need to realloc
|
|
|
+ for (pass=0; pass < 2; ++pass) {
|
|
|
+ float x=0,y=0;
|
|
|
+ if (pass == 1) {
|
|
|
+ points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata);
|
|
|
+ if (points == NULL) goto error;
|
|
|
+ }
|
|
|
+ num_points = 0;
|
|
|
+ n= -1;
|
|
|
+ for (i=0; i < num_verts; ++i) {
|
|
|
+ switch (vertices[i].type) {
|
|
|
+ case STBTT_vmove:
|
|
|
+ // start the next contour
|
|
|
+ if (n >= 0)
|
|
|
+ (*contour_lengths)[n] = num_points - start;
|
|
|
+ ++n;
|
|
|
+ start = num_points;
|
|
|
+
|
|
|
+ x = vertices[i].x, y = vertices[i].y;
|
|
|
+ stbtt__add_point(points, num_points++, x,y);
|
|
|
+ break;
|
|
|
+ case STBTT_vline:
|
|
|
+ x = vertices[i].x, y = vertices[i].y;
|
|
|
+ stbtt__add_point(points, num_points++, x, y);
|
|
|
+ break;
|
|
|
+ case STBTT_vcurve:
|
|
|
+ stbtt__tesselate_curve(points, &num_points, x,y,
|
|
|
+ vertices[i].cx, vertices[i].cy,
|
|
|
+ vertices[i].x, vertices[i].y,
|
|
|
+ objspace_flatness_squared, 0);
|
|
|
+ x = vertices[i].x, y = vertices[i].y;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ (*contour_lengths)[n] = num_points - start;
|
|
|
+ }
|
|
|
+
|
|
|
+ return points;
|
|
|
+error:
|
|
|
+ STBTT_free(points, userdata);
|
|
|
+ STBTT_free(*contour_lengths, userdata);
|
|
|
+ *contour_lengths = 0;
|
|
|
+ *num_contours = 0;
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
|
|
|
+{
|
|
|
+ float scale = scale_x > scale_y ? scale_y : scale_x;
|
|
|
+ int winding_count, *winding_lengths;
|
|
|
+ stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata);
|
|
|
+ if (windings) {
|
|
|
+ stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata);
|
|
|
+ STBTT_free(winding_lengths, userdata);
|
|
|
+ STBTT_free(windings, userdata);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
|
|
|
+{
|
|
|
+ STBTT_free(bitmap, userdata);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff)
|
|
|
+{
|
|
|
+ int ix0,iy0,ix1,iy1;
|
|
|
+ stbtt__bitmap gbm;
|
|
|
+ stbtt_vertex *vertices;
|
|
|
+ int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
|
|
|
+
|
|
|
+ if (scale_x == 0) scale_x = scale_y;
|
|
|
+ if (scale_y == 0) {
|
|
|
+ if (scale_x == 0) return NULL;
|
|
|
+ scale_y = scale_x;
|
|
|
+ }
|
|
|
+
|
|
|
+ stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1);
|
|
|
+
|
|
|
+ // now we get the size
|
|
|
+ gbm.w = (ix1 - ix0);
|
|
|
+ gbm.h = (iy1 - iy0);
|
|
|
+ gbm.pixels = NULL; // in case we error
|
|
|
+
|
|
|
+ if (width ) *width = gbm.w;
|
|
|
+ if (height) *height = gbm.h;
|
|
|
+ if (xoff ) *xoff = ix0;
|
|
|
+ if (yoff ) *yoff = iy0;
|
|
|
+
|
|
|
+ if (gbm.w && gbm.h) {
|
|
|
+ gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata);
|
|
|
+ if (gbm.pixels) {
|
|
|
+ gbm.stride = gbm.w;
|
|
|
+
|
|
|
+ stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ STBTT_free(vertices, info->userdata);
|
|
|
+ return gbm.pixels;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
|
|
|
+{
|
|
|
+ return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph)
|
|
|
+{
|
|
|
+ int ix0,iy0;
|
|
|
+ stbtt_vertex *vertices;
|
|
|
+ int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
|
|
|
+ stbtt__bitmap gbm;
|
|
|
+
|
|
|
+ stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0);
|
|
|
+ gbm.pixels = output;
|
|
|
+ gbm.w = out_w;
|
|
|
+ gbm.h = out_h;
|
|
|
+ gbm.stride = out_stride;
|
|
|
+
|
|
|
+ if (gbm.w && gbm.h)
|
|
|
+ stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata);
|
|
|
+
|
|
|
+ STBTT_free(vertices, info->userdata);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph)
|
|
|
+{
|
|
|
+ stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
|
|
|
+{
|
|
|
+ return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint)
|
|
|
+{
|
|
|
+ stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint));
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
|
|
|
+{
|
|
|
+ return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint)
|
|
|
+{
|
|
|
+ stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint);
|
|
|
+}
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// bitmap baking
|
|
|
+//
|
|
|
+// This is SUPER-CRAPPY packing to keep source code small
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf)
|
|
|
+ float pixel_height, // height of font in pixels
|
|
|
+ unsigned char *pixels, int pw, int ph, // bitmap to be filled in
|
|
|
+ int first_char, int num_chars, // characters to bake
|
|
|
+ stbtt_bakedchar *chardata)
|
|
|
+{
|
|
|
+ float scale;
|
|
|
+ int x,y,bottom_y, i;
|
|
|
+ stbtt_fontinfo f;
|
|
|
+ if (!stbtt_InitFont(&f, data, offset))
|
|
|
+ return -1;
|
|
|
+ STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
|
|
|
+ x=y=1;
|
|
|
+ bottom_y = 1;
|
|
|
+
|
|
|
+ scale = stbtt_ScaleForPixelHeight(&f, pixel_height);
|
|
|
+
|
|
|
+ for (i=0; i < num_chars; ++i) {
|
|
|
+ int advance, lsb, x0,y0,x1,y1,gw,gh;
|
|
|
+ int g = stbtt_FindGlyphIndex(&f, first_char + i);
|
|
|
+ stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb);
|
|
|
+ stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1);
|
|
|
+ gw = x1-x0;
|
|
|
+ gh = y1-y0;
|
|
|
+ if (x + gw + 1 >= pw)
|
|
|
+ y = bottom_y, x = 1; // advance to next row
|
|
|
+ if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row
|
|
|
+ return -i;
|
|
|
+ STBTT_assert(x+gw < pw);
|
|
|
+ STBTT_assert(y+gh < ph);
|
|
|
+ stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g);
|
|
|
+ chardata[i].x0 = (stbtt_int16) x;
|
|
|
+ chardata[i].y0 = (stbtt_int16) y;
|
|
|
+ chardata[i].x1 = (stbtt_int16) (x + gw);
|
|
|
+ chardata[i].y1 = (stbtt_int16) (y + gh);
|
|
|
+ chardata[i].xadvance = scale * advance;
|
|
|
+ chardata[i].xoff = (float) x0;
|
|
|
+ chardata[i].yoff = (float) y0;
|
|
|
+ x = x + gw + 1;
|
|
|
+ if (y+gh+1 > bottom_y)
|
|
|
+ bottom_y = y+gh+1;
|
|
|
+ }
|
|
|
+ return bottom_y;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
|
|
|
+{
|
|
|
+ float d3d_bias = opengl_fillrule ? 0 : -0.5f;
|
|
|
+ float ipw = 1.0f / pw, iph = 1.0f / ph;
|
|
|
+ stbtt_bakedchar *b = chardata + char_index;
|
|
|
+ int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f);
|
|
|
+ int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f);
|
|
|
+
|
|
|
+ q->x0 = round_x + d3d_bias;
|
|
|
+ q->y0 = round_y + d3d_bias;
|
|
|
+ q->x1 = round_x + b->x1 - b->x0 + d3d_bias;
|
|
|
+ q->y1 = round_y + b->y1 - b->y0 + d3d_bias;
|
|
|
+
|
|
|
+ q->s0 = b->x0 * ipw;
|
|
|
+ q->t0 = b->y0 * iph;
|
|
|
+ q->s1 = b->x1 * ipw;
|
|
|
+ q->t1 = b->y1 * iph;
|
|
|
+
|
|
|
+ *xpos += b->xadvance;
|
|
|
+}
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// rectangle packing replacement routines if you don't have stb_rect_pack.h
|
|
|
+//
|
|
|
+
|
|
|
+#ifndef STB_RECT_PACK_VERSION
|
|
|
+#ifdef _MSC_VER
|
|
|
+#define STBTT__NOTUSED(v) (void)(v)
|
|
|
+#else
|
|
|
+#define STBTT__NOTUSED(v) (void)sizeof(v)
|
|
|
+#endif
|
|
|
+
|
|
|
+typedef int stbrp_coord;
|
|
|
+
|
|
|
+////////////////////////////////////////////////////////////////////////////////////
|
|
|
+// //
|
|
|
+// //
|
|
|
+// COMPILER WARNING ?!?!? //
|
|
|
+// //
|
|
|
+// //
|
|
|
+// if you get a compile warning due to these symbols being defined more than //
|
|
|
+// once, move #include "stb_rect_pack.h" before #include "stb_truetype.h" //
|
|
|
+// //
|
|
|
+////////////////////////////////////////////////////////////////////////////////////
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ int width,height;
|
|
|
+ int x,y,bottom_y;
|
|
|
+} stbrp_context;
|
|
|
+
|
|
|
+typedef struct
|
|
|
+{
|
|
|
+ unsigned char x;
|
|
|
+} stbrp_node;
|
|
|
+
|
|
|
+struct stbrp_rect
|
|
|
+{
|
|
|
+ stbrp_coord x,y;
|
|
|
+ int id,w,h,was_packed;
|
|
|
+};
|
|
|
+
|
|
|
+static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes)
|
|
|
+{
|
|
|
+ con->width = pw;
|
|
|
+ con->height = ph;
|
|
|
+ con->x = 0;
|
|
|
+ con->y = 0;
|
|
|
+ con->bottom_y = 0;
|
|
|
+ STBTT__NOTUSED(nodes);
|
|
|
+ STBTT__NOTUSED(num_nodes);
|
|
|
+}
|
|
|
+
|
|
|
+static void stbrp_pack_rects(stbrp_context *con, stbrp_rect *rects, int num_rects)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+ for (i=0; i < num_rects; ++i) {
|
|
|
+ if (con->x + rects[i].w > con->width) {
|
|
|
+ con->x = 0;
|
|
|
+ con->y = con->bottom_y;
|
|
|
+ }
|
|
|
+ if (con->y + rects[i].h > con->height)
|
|
|
+ break;
|
|
|
+ rects[i].x = con->x;
|
|
|
+ rects[i].y = con->y;
|
|
|
+ rects[i].was_packed = 1;
|
|
|
+ con->x += rects[i].w;
|
|
|
+ if (con->y + rects[i].h > con->bottom_y)
|
|
|
+ con->bottom_y = con->y + rects[i].h;
|
|
|
+ }
|
|
|
+ for ( ; i < num_rects; ++i)
|
|
|
+ rects[i].was_packed = 0;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// bitmap baking
|
|
|
+//
|
|
|
+// This is SUPER-AWESOME (tm Ryan Gordon) packing using stb_rect_pack.h. If
|
|
|
+// stb_rect_pack.h isn't available, it uses the BakeFontBitmap strategy.
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
|
|
|
+{
|
|
|
+ stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context) ,alloc_context);
|
|
|
+ int num_nodes = pw - padding;
|
|
|
+ stbrp_node *nodes = (stbrp_node *) STBTT_malloc(sizeof(*nodes ) * num_nodes,alloc_context);
|
|
|
+
|
|
|
+ if (context == NULL || nodes == NULL) {
|
|
|
+ if (context != NULL) STBTT_free(context, alloc_context);
|
|
|
+ if (nodes != NULL) STBTT_free(nodes , alloc_context);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ spc->user_allocator_context = alloc_context;
|
|
|
+ spc->width = pw;
|
|
|
+ spc->height = ph;
|
|
|
+ spc->pixels = pixels;
|
|
|
+ spc->pack_info = context;
|
|
|
+ spc->nodes = nodes;
|
|
|
+ spc->padding = padding;
|
|
|
+ spc->stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw;
|
|
|
+ spc->h_oversample = 1;
|
|
|
+ spc->v_oversample = 1;
|
|
|
+
|
|
|
+ stbrp_init_target(context, pw-padding, ph-padding, nodes, num_nodes);
|
|
|
+
|
|
|
+ if (pixels)
|
|
|
+ STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc)
|
|
|
+{
|
|
|
+ STBTT_free(spc->nodes , spc->user_allocator_context);
|
|
|
+ STBTT_free(spc->pack_info, spc->user_allocator_context);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample)
|
|
|
+{
|
|
|
+ STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE);
|
|
|
+ STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE);
|
|
|
+ if (h_oversample <= STBTT_MAX_OVERSAMPLE)
|
|
|
+ spc->h_oversample = h_oversample;
|
|
|
+ if (v_oversample <= STBTT_MAX_OVERSAMPLE)
|
|
|
+ spc->v_oversample = v_oversample;
|
|
|
+}
|
|
|
+
|
|
|
+#define STBTT__OVER_MASK (STBTT_MAX_OVERSAMPLE-1)
|
|
|
+
|
|
|
+static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
|
|
|
+{
|
|
|
+ unsigned char buffer[STBTT_MAX_OVERSAMPLE];
|
|
|
+ int safe_w = w - kernel_width;
|
|
|
+ int j;
|
|
|
+ for (j=0; j < h; ++j) {
|
|
|
+ int i;
|
|
|
+ unsigned int total;
|
|
|
+ STBTT_memset(buffer, 0, kernel_width);
|
|
|
+
|
|
|
+ total = 0;
|
|
|
+
|
|
|
+ // make kernel_width a constant in common cases so compiler can optimize out the divide
|
|
|
+ switch (kernel_width) {
|
|
|
+ case 2:
|
|
|
+ for (i=0; i <= safe_w; ++i) {
|
|
|
+ total += pixels[i] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
|
|
|
+ pixels[i] = (unsigned char) (total / 2);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 3:
|
|
|
+ for (i=0; i <= safe_w; ++i) {
|
|
|
+ total += pixels[i] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
|
|
|
+ pixels[i] = (unsigned char) (total / 3);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 4:
|
|
|
+ for (i=0; i <= safe_w; ++i) {
|
|
|
+ total += pixels[i] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
|
|
|
+ pixels[i] = (unsigned char) (total / 4);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 5:
|
|
|
+ for (i=0; i <= safe_w; ++i) {
|
|
|
+ total += pixels[i] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
|
|
|
+ pixels[i] = (unsigned char) (total / 5);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ for (i=0; i <= safe_w; ++i) {
|
|
|
+ total += pixels[i] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
|
|
|
+ pixels[i] = (unsigned char) (total / kernel_width);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (; i < w; ++i) {
|
|
|
+ STBTT_assert(pixels[i] == 0);
|
|
|
+ total -= buffer[i & STBTT__OVER_MASK];
|
|
|
+ pixels[i] = (unsigned char) (total / kernel_width);
|
|
|
+ }
|
|
|
+
|
|
|
+ pixels += stride_in_bytes;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
|
|
|
+{
|
|
|
+ unsigned char buffer[STBTT_MAX_OVERSAMPLE];
|
|
|
+ int safe_h = h - kernel_width;
|
|
|
+ int j;
|
|
|
+ for (j=0; j < w; ++j) {
|
|
|
+ int i;
|
|
|
+ unsigned int total;
|
|
|
+ STBTT_memset(buffer, 0, kernel_width);
|
|
|
+
|
|
|
+ total = 0;
|
|
|
+
|
|
|
+ // make kernel_width a constant in common cases so compiler can optimize out the divide
|
|
|
+ switch (kernel_width) {
|
|
|
+ case 2:
|
|
|
+ for (i=0; i <= safe_h; ++i) {
|
|
|
+ total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / 2);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 3:
|
|
|
+ for (i=0; i <= safe_h; ++i) {
|
|
|
+ total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / 3);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 4:
|
|
|
+ for (i=0; i <= safe_h; ++i) {
|
|
|
+ total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / 4);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 5:
|
|
|
+ for (i=0; i <= safe_h; ++i) {
|
|
|
+ total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / 5);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ for (i=0; i <= safe_h; ++i) {
|
|
|
+ total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
|
|
|
+ buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (; i < h; ++i) {
|
|
|
+ STBTT_assert(pixels[i*stride_in_bytes] == 0);
|
|
|
+ total -= buffer[i & STBTT__OVER_MASK];
|
|
|
+ pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
|
|
|
+ }
|
|
|
+
|
|
|
+ pixels += 1;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static float stbtt__oversample_shift(int oversample)
|
|
|
+{
|
|
|
+ if (!oversample)
|
|
|
+ return 0.0f;
|
|
|
+
|
|
|
+ // The prefilter is a box filter of width "oversample",
|
|
|
+ // which shifts phase by (oversample - 1)/2 pixels in
|
|
|
+ // oversampled space. We want to shift in the opposite
|
|
|
+ // direction to counter this.
|
|
|
+ return (float)-(oversample - 1) / (2.0f * (float)oversample);
|
|
|
+}
|
|
|
+
|
|
|
+// rects array must be big enough to accommodate all characters in the given ranges
|
|
|
+STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
|
|
|
+{
|
|
|
+ int i,j,k;
|
|
|
+
|
|
|
+ k=0;
|
|
|
+ for (i=0; i < num_ranges; ++i) {
|
|
|
+ float fh = ranges[i].font_size;
|
|
|
+ float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
|
|
|
+ ranges[i].h_oversample = (unsigned char) spc->h_oversample;
|
|
|
+ ranges[i].v_oversample = (unsigned char) spc->v_oversample;
|
|
|
+ for (j=0; j < ranges[i].num_chars; ++j) {
|
|
|
+ int x0,y0,x1,y1;
|
|
|
+ int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
|
|
|
+ int glyph = stbtt_FindGlyphIndex(info, codepoint);
|
|
|
+ stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
|
|
|
+ scale * spc->h_oversample,
|
|
|
+ scale * spc->v_oversample,
|
|
|
+ 0,0,
|
|
|
+ &x0,&y0,&x1,&y1);
|
|
|
+ rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1);
|
|
|
+ rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1);
|
|
|
+ ++k;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return k;
|
|
|
+}
|
|
|
+
|
|
|
+// rects array must be big enough to accommodate all characters in the given ranges
|
|
|
+STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
|
|
|
+{
|
|
|
+ int i,j,k, return_value = 1;
|
|
|
+
|
|
|
+ // save current values
|
|
|
+ int old_h_over = spc->h_oversample;
|
|
|
+ int old_v_over = spc->v_oversample;
|
|
|
+
|
|
|
+ k = 0;
|
|
|
+ for (i=0; i < num_ranges; ++i) {
|
|
|
+ float fh = ranges[i].font_size;
|
|
|
+ float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
|
|
|
+ float recip_h,recip_v,sub_x,sub_y;
|
|
|
+ spc->h_oversample = ranges[i].h_oversample;
|
|
|
+ spc->v_oversample = ranges[i].v_oversample;
|
|
|
+ recip_h = 1.0f / spc->h_oversample;
|
|
|
+ recip_v = 1.0f / spc->v_oversample;
|
|
|
+ sub_x = stbtt__oversample_shift(spc->h_oversample);
|
|
|
+ sub_y = stbtt__oversample_shift(spc->v_oversample);
|
|
|
+ for (j=0; j < ranges[i].num_chars; ++j) {
|
|
|
+ stbrp_rect *r = &rects[k];
|
|
|
+ if (r->was_packed) {
|
|
|
+ stbtt_packedchar *bc = &ranges[i].chardata_for_range[j];
|
|
|
+ int advance, lsb, x0,y0,x1,y1;
|
|
|
+ int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
|
|
|
+ int glyph = stbtt_FindGlyphIndex(info, codepoint);
|
|
|
+ stbrp_coord pad = (stbrp_coord) spc->padding;
|
|
|
+
|
|
|
+ // pad on left and top
|
|
|
+ r->x += pad;
|
|
|
+ r->y += pad;
|
|
|
+ r->w -= pad;
|
|
|
+ r->h -= pad;
|
|
|
+ stbtt_GetGlyphHMetrics(info, glyph, &advance, &lsb);
|
|
|
+ stbtt_GetGlyphBitmapBox(info, glyph,
|
|
|
+ scale * spc->h_oversample,
|
|
|
+ scale * spc->v_oversample,
|
|
|
+ &x0,&y0,&x1,&y1);
|
|
|
+ stbtt_MakeGlyphBitmapSubpixel(info,
|
|
|
+ spc->pixels + r->x + r->y*spc->stride_in_bytes,
|
|
|
+ r->w - spc->h_oversample+1,
|
|
|
+ r->h - spc->v_oversample+1,
|
|
|
+ spc->stride_in_bytes,
|
|
|
+ scale * spc->h_oversample,
|
|
|
+ scale * spc->v_oversample,
|
|
|
+ 0,0,
|
|
|
+ glyph);
|
|
|
+
|
|
|
+ if (spc->h_oversample > 1)
|
|
|
+ stbtt__h_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
|
|
|
+ r->w, r->h, spc->stride_in_bytes,
|
|
|
+ spc->h_oversample);
|
|
|
+
|
|
|
+ if (spc->v_oversample > 1)
|
|
|
+ stbtt__v_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
|
|
|
+ r->w, r->h, spc->stride_in_bytes,
|
|
|
+ spc->v_oversample);
|
|
|
+
|
|
|
+ bc->x0 = (stbtt_int16) r->x;
|
|
|
+ bc->y0 = (stbtt_int16) r->y;
|
|
|
+ bc->x1 = (stbtt_int16) (r->x + r->w);
|
|
|
+ bc->y1 = (stbtt_int16) (r->y + r->h);
|
|
|
+ bc->xadvance = scale * advance;
|
|
|
+ bc->xoff = (float) x0 * recip_h + sub_x;
|
|
|
+ bc->yoff = (float) y0 * recip_v + sub_y;
|
|
|
+ bc->xoff2 = (x0 + r->w) * recip_h + sub_x;
|
|
|
+ bc->yoff2 = (y0 + r->h) * recip_v + sub_y;
|
|
|
+ } else {
|
|
|
+ return_value = 0; // if any fail, report failure
|
|
|
+ }
|
|
|
+
|
|
|
+ ++k;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // restore original values
|
|
|
+ spc->h_oversample = old_h_over;
|
|
|
+ spc->v_oversample = old_v_over;
|
|
|
+
|
|
|
+ return return_value;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects)
|
|
|
+{
|
|
|
+ stbrp_pack_rects((stbrp_context *) spc->pack_info, rects, num_rects);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
|
|
|
+{
|
|
|
+ stbtt_fontinfo info;
|
|
|
+ int i,j,n, return_value = 1;
|
|
|
+ //stbrp_context *context = (stbrp_context *) spc->pack_info;
|
|
|
+ stbrp_rect *rects;
|
|
|
+
|
|
|
+ // flag all characters as NOT packed
|
|
|
+ for (i=0; i < num_ranges; ++i)
|
|
|
+ for (j=0; j < ranges[i].num_chars; ++j)
|
|
|
+ ranges[i].chardata_for_range[j].x0 =
|
|
|
+ ranges[i].chardata_for_range[j].y0 =
|
|
|
+ ranges[i].chardata_for_range[j].x1 =
|
|
|
+ ranges[i].chardata_for_range[j].y1 = 0;
|
|
|
+
|
|
|
+ n = 0;
|
|
|
+ for (i=0; i < num_ranges; ++i)
|
|
|
+ n += ranges[i].num_chars;
|
|
|
+
|
|
|
+ rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context);
|
|
|
+ if (rects == NULL)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index));
|
|
|
+
|
|
|
+ n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects);
|
|
|
+
|
|
|
+ stbtt_PackFontRangesPackRects(spc, rects, n);
|
|
|
+
|
|
|
+ return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
|
|
|
+
|
|
|
+ STBTT_free(rects, spc->user_allocator_context);
|
|
|
+ return return_value;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
|
|
|
+ int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range)
|
|
|
+{
|
|
|
+ stbtt_pack_range range;
|
|
|
+ range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range;
|
|
|
+ range.array_of_unicode_codepoints = NULL;
|
|
|
+ range.num_chars = num_chars_in_range;
|
|
|
+ range.chardata_for_range = chardata_for_range;
|
|
|
+ range.font_size = font_size;
|
|
|
+ return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1);
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer)
|
|
|
+{
|
|
|
+ float ipw = 1.0f / pw, iph = 1.0f / ph;
|
|
|
+ stbtt_packedchar *b = chardata + char_index;
|
|
|
+
|
|
|
+ if (align_to_integer) {
|
|
|
+ float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f);
|
|
|
+ float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f);
|
|
|
+ q->x0 = x;
|
|
|
+ q->y0 = y;
|
|
|
+ q->x1 = x + b->xoff2 - b->xoff;
|
|
|
+ q->y1 = y + b->yoff2 - b->yoff;
|
|
|
+ } else {
|
|
|
+ q->x0 = *xpos + b->xoff;
|
|
|
+ q->y0 = *ypos + b->yoff;
|
|
|
+ q->x1 = *xpos + b->xoff2;
|
|
|
+ q->y1 = *ypos + b->yoff2;
|
|
|
+ }
|
|
|
+
|
|
|
+ q->s0 = b->x0 * ipw;
|
|
|
+ q->t0 = b->y0 * iph;
|
|
|
+ q->s1 = b->x1 * ipw;
|
|
|
+ q->t1 = b->y1 * iph;
|
|
|
+
|
|
|
+ *xpos += b->xadvance;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+//////////////////////////////////////////////////////////////////////////////
|
|
|
+//
|
|
|
+// font name matching -- recommended not to use this
|
|
|
+//
|
|
|
+
|
|
|
+// check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string
|
|
|
+static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(const stbtt_uint8 *s1, stbtt_int32 len1, const stbtt_uint8 *s2, stbtt_int32 len2)
|
|
|
+{
|
|
|
+ stbtt_int32 i=0;
|
|
|
+
|
|
|
+ // convert utf16 to utf8 and compare the results while converting
|
|
|
+ while (len2) {
|
|
|
+ stbtt_uint16 ch = s2[0]*256 + s2[1];
|
|
|
+ if (ch < 0x80) {
|
|
|
+ if (i >= len1) return -1;
|
|
|
+ if (s1[i++] != ch) return -1;
|
|
|
+ } else if (ch < 0x800) {
|
|
|
+ if (i+1 >= len1) return -1;
|
|
|
+ if (s1[i++] != 0xc0 + (ch >> 6)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + (ch & 0x3f)) return -1;
|
|
|
+ } else if (ch >= 0xd800 && ch < 0xdc00) {
|
|
|
+ stbtt_uint32 c;
|
|
|
+ stbtt_uint16 ch2 = s2[2]*256 + s2[3];
|
|
|
+ if (i+3 >= len1) return -1;
|
|
|
+ c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000;
|
|
|
+ if (s1[i++] != 0xf0 + (c >> 18)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1;
|
|
|
+ s2 += 2; // plus another 2 below
|
|
|
+ len2 -= 2;
|
|
|
+ } else if (ch >= 0xdc00 && ch < 0xe000) {
|
|
|
+ return -1;
|
|
|
+ } else {
|
|
|
+ if (i+2 >= len1) return -1;
|
|
|
+ if (s1[i++] != 0xe0 + (ch >> 12)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1;
|
|
|
+ if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1;
|
|
|
+ }
|
|
|
+ s2 += 2;
|
|
|
+ len2 -= 2;
|
|
|
+ }
|
|
|
+ return i;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2)
|
|
|
+{
|
|
|
+ return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((const stbtt_uint8*) s1, len1, (const stbtt_uint8*) s2, len2);
|
|
|
+}
|
|
|
+
|
|
|
+// returns results in whatever encoding you request... but note that 2-byte encodings
|
|
|
+// will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare
|
|
|
+STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
|
|
|
+{
|
|
|
+ stbtt_int32 i,count,stringOffset;
|
|
|
+ stbtt_uint8 *fc = font->data;
|
|
|
+ stbtt_uint32 offset = font->fontstart;
|
|
|
+ stbtt_uint32 nm = stbtt__find_table(fc, offset, "name");
|
|
|
+ if (!nm) return NULL;
|
|
|
+
|
|
|
+ count = ttUSHORT(fc+nm+2);
|
|
|
+ stringOffset = nm + ttUSHORT(fc+nm+4);
|
|
|
+ for (i=0; i < count; ++i) {
|
|
|
+ stbtt_uint32 loc = nm + 6 + 12 * i;
|
|
|
+ if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2)
|
|
|
+ && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) {
|
|
|
+ *length = ttUSHORT(fc+loc+8);
|
|
|
+ return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10));
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return NULL;
|
|
|
+}
|
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+
|
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+static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id)
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|
|
+{
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|
+ stbtt_int32 i;
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|
+ stbtt_int32 count = ttUSHORT(fc+nm+2);
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+ stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4);
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+
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+ for (i=0; i < count; ++i) {
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+ stbtt_uint32 loc = nm + 6 + 12 * i;
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+ stbtt_int32 id = ttUSHORT(fc+loc+6);
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|
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+ if (id == target_id) {
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|
|
+ // find the encoding
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+ stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4);
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+
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+ // is this a Unicode encoding?
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+ if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) {
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+ stbtt_int32 slen = ttUSHORT(fc+loc+8);
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+ stbtt_int32 off = ttUSHORT(fc+loc+10);
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+
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|
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+ // check if there's a prefix match
|
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|
+ stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen);
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|
|
+ if (matchlen >= 0) {
|
|
|
+ // check for target_id+1 immediately following, with same encoding & language
|
|
|
+ if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) {
|
|
|
+ slen = ttUSHORT(fc+loc+12+8);
|
|
|
+ off = ttUSHORT(fc+loc+12+10);
|
|
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+ if (slen == 0) {
|
|
|
+ if (matchlen == nlen)
|
|
|
+ return 1;
|
|
|
+ } else if (matchlen < nlen && name[matchlen] == ' ') {
|
|
|
+ ++matchlen;
|
|
|
+ if (stbtt_CompareUTF8toUTF16_bigendian((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen))
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // if nothing immediately following
|
|
|
+ if (matchlen == nlen)
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // @TODO handle other encodings
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags)
|
|
|
+{
|
|
|
+ stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name);
|
|
|
+ stbtt_uint32 nm,hd;
|
|
|
+ if (!stbtt__isfont(fc+offset)) return 0;
|
|
|
+
|
|
|
+ // check italics/bold/underline flags in macStyle...
|
|
|
+ if (flags) {
|
|
|
+ hd = stbtt__find_table(fc, offset, "head");
|
|
|
+ if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ nm = stbtt__find_table(fc, offset, "name");
|
|
|
+ if (!nm) return 0;
|
|
|
+
|
|
|
+ if (flags) {
|
|
|
+ // if we checked the macStyle flags, then just check the family and ignore the subfamily
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1;
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1;
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
|
|
|
+ } else {
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1;
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1;
|
|
|
+ if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags)
|
|
|
+{
|
|
|
+ stbtt_int32 i;
|
|
|
+ for (i=0;;++i) {
|
|
|
+ stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i);
|
|
|
+ if (off < 0) return off;
|
|
|
+ if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags))
|
|
|
+ return off;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+#endif // STB_TRUETYPE_IMPLEMENTATION
|
|
|
+
|
|
|
+
|
|
|
+// FULL VERSION HISTORY
|
|
|
+//
|
|
|
+// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
|
|
|
+// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
|
|
|
+// allow PackFontRanges to pack and render in separate phases;
|
|
|
+// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
|
|
|
+// fixed an assert() bug in the new rasterizer
|
|
|
+// replace assert() with STBTT_assert() in new rasterizer
|
|
|
+// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine)
|
|
|
+// also more precise AA rasterizer, except if shapes overlap
|
|
|
+// remove need for STBTT_sort
|
|
|
+// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
|
|
|
+// 1.04 (2015-04-15) typo in example
|
|
|
+// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes
|
|
|
+// 1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++
|
|
|
+// 1.01 (2014-12-08) fix subpixel position when oversampling to exactly match
|
|
|
+// non-oversampled; STBTT_POINT_SIZE for packed case only
|
|
|
+// 1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling
|
|
|
+// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)
|
|
|
+// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID
|
|
|
+// 0.8b (2014-07-07) fix a warning
|
|
|
+// 0.8 (2014-05-25) fix a few more warnings
|
|
|
+// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back
|
|
|
+// 0.6c (2012-07-24) improve documentation
|
|
|
+// 0.6b (2012-07-20) fix a few more warnings
|
|
|
+// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,
|
|
|
+// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty
|
|
|
+// 0.5 (2011-12-09) bugfixes:
|
|
|
+// subpixel glyph renderer computed wrong bounding box
|
|
|
+// first vertex of shape can be off-curve (FreeSans)
|
|
|
+// 0.4b (2011-12-03) fixed an error in the font baking example
|
|
|
+// 0.4 (2011-12-01) kerning, subpixel rendering (tor)
|
|
|
+// bugfixes for:
|
|
|
+// codepoint-to-glyph conversion using table fmt=12
|
|
|
+// codepoint-to-glyph conversion using table fmt=4
|
|
|
+// stbtt_GetBakedQuad with non-square texture (Zer)
|
|
|
+// updated Hello World! sample to use kerning and subpixel
|
|
|
+// fixed some warnings
|
|
|
+// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM)
|
|
|
+// userdata, malloc-from-userdata, non-zero fill (stb)
|
|
|
+// 0.2 (2009-03-11) Fix unsigned/signed char warnings
|
|
|
+// 0.1 (2009-03-09) First public release
|
|
|
+//
|
blitz-research