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-/*
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-Copyright (c) 2013 Daniele Bartolini, Michele Rossi
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-Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto
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-
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-Permission is hereby granted, free of charge, to any person
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-obtaining a copy of this software and associated documentation
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-files (the "Software"), to deal in the Software without
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-restriction, including without limitation the rights to use,
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-copy, modify, merge, publish, distribute, sublicense, and/or sell
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-copies of the Software, and to permit persons to whom the
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-Software is furnished to do so, subject to the following
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-conditions:
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-
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-The above copyright notice and this permission notice shall be
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-included in all copies or substantial portions of the Software.
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-
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-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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-OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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-HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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-FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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-OTHER DEALINGS IN THE SOFTWARE.
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-*/
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-
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-#pragma once
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-
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-#include <GL/glew.h>
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-#include "Texture.h"
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-#include "Material.h"
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-#include "PixelFormat.h"
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-
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-namespace crown
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-{
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-
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-/// OpenGL utilities for converting from wrapped names to GL names and vice-versa.
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-class GL
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-{
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-public:
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-
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- static GLenum compare_function(CompareFunction function);
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- static GLenum blend_function(BlendFunction function);
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- static GLenum blend_equation(BlendEquation equation);
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- static GLenum texture_wrap(TextureWrap wrap);
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- static void texture_filter(TextureFilter filter, GLint& minFilter, GLint& magFilter);
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- static GLenum polygon_mode(PolygonMode mode);
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- static GLenum pixel_format(PixelFormat format);
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- static PixelFormat pixel_format_from_gl_format(GLenum format);
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-
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-private:
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-
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- static const GLenum COMPARE_FUNCTION_TABLE[CF_COUNT];
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- static const GLenum BLEND_FUNCTION_TABLE[BF_COUNT];
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- static const GLenum BLEND_EQUATION_TABLE[BE_COUNT];
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- static const GLenum TEXTURE_WRAP_TABLE[TW_COUNT];
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- static const GLenum TEXTURE_MIN_FILTER_TABLE[TF_COUNT];
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- static const GLenum TEXTURE_MAG_FILTER_TABLE[TF_COUNT];
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- static const GLenum POLYGON_MODE_TABLE[PM_COUNT];
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-
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- // Disable construction
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- GL();
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-};
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::compare_function(CompareFunction function)
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-{
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- return COMPARE_FUNCTION_TABLE[function];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::blend_function(BlendFunction function)
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-{
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- return BLEND_FUNCTION_TABLE[function];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::blend_equation(BlendEquation equation)
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-{
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- return BLEND_EQUATION_TABLE[equation];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::texture_wrap(TextureWrap wrap)
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-{
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- return TEXTURE_WRAP_TABLE[wrap];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline void GL::texture_filter(TextureFilter filter, GLint& minFilter, GLint& magFilter)
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-{
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- minFilter = TEXTURE_MIN_FILTER_TABLE[filter];
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- magFilter = TEXTURE_MAG_FILTER_TABLE[filter];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::polygon_mode(PolygonMode mode)
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-{
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- return POLYGON_MODE_TABLE[mode];
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline GLenum GL::pixel_format(PixelFormat format)
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-{
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- switch (format)
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- {
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- case PF_RGBA_8:
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- return GL_RGBA;
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- case PF_RGB_8:
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- return GL_RGB;
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- case PF_LA_8:
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- return GL_LUMINANCE_ALPHA;
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- case PF_L_8:
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- return GL_LUMINANCE;
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- default:
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- return GL_RGB;
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- }
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-}
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-
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-//-----------------------------------------------------------------------------
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-inline PixelFormat GL::pixel_format_from_gl_format(GLenum format)
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-{
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- switch (format)
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- {
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- case GL_RGBA:
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- return PF_RGBA_8;
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- case GL_RGB:
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- return PF_RGB_8;
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- case GL_LUMINANCE_ALPHA:
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- return PF_LA_8;
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- case GL_LUMINANCE:
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- return PF_L_8;
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- default:
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- return PF_RGB_8;
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- }
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-}
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-
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-} // namespace crown
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-
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