love2d.love/src/modules/graphics/opengl/wrap_Font.cpp

/**
 * Copyright (c) 2006-2013 LOVE Development Team
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 **/

// LOVE
#include "wrap_Font.h"

namespace love
{
namespace graphics
{
namespace opengl
{

Font *luax_checkfont(lua_State *L, int idx)
{
	return luax_checktype<Font>(L, idx, "Font", GRAPHICS_FONT_T);
}

int w_Font_getHeight(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	lua_pushnumber(L, t->getHeight());
	return 1;
}

int w_Font_getWidth(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	const char *str = luaL_checkstring(L, 2);
	try
	{
		lua_pushinteger(L, t->getWidth(str));
	}
	catch(love::Exception &e)
	{
		return luaL_error(L, e.what());
	}
	return 1;
}

int w_Font_getWrap(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	const char *str = luaL_checkstring(L, 2);
	float wrap = (float) luaL_checknumber(L, 3);
	int max_width = 0, numlines = 0;
	try
	{
		std::vector<std::string> lines = t->getWrap(str, wrap, &max_width);
		numlines = lines.size();
	}
	catch(love::Exception &e)
	{
		return luaL_error(L, e.what());
	}
	lua_pushinteger(L, max_width);
	lua_pushinteger(L, numlines);
	return 2;
}

int w_Font_setLineHeight(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	float h = (float)luaL_checknumber(L, 2);
	t->setLineHeight(h);
	return 0;
}

int w_Font_getLineHeight(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	lua_pushnumber(L, t->getLineHeight());
	return 1;
}

int w_Font_setFilter(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	Image::Filter f = t->getFilter();

	const char *minstr = luaL_checkstring(L, 2);
	const char *magstr = luaL_optstring(L, 3, minstr);

	if (!Image::getConstant(minstr, f.min))
		return luaL_error(L, "Invalid filter mode: %s", minstr);
	if (!Image::getConstant(magstr, f.mag))
		return luaL_error(L, "Invalid filter mode: %s", magstr);

	f.anisotropy = (float) luaL_optnumber(L, 4, 1.0);

	try
	{
		t->setFilter(f);
	}
	catch(love::Exception &e)
	{
		return luaL_error(L, "%s", e.what());
	}

	return 0;
}

int w_Font_getFilter(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	const Image::Filter f = t->getFilter();
	const char *minstr;
	const char *magstr;
	Image::getConstant(f.min, minstr);
	Image::getConstant(f.mag, magstr);
	lua_pushstring(L, minstr);
	lua_pushstring(L, magstr);
	lua_pushnumber(L, f.anisotropy);
	return 3;
}

int w_Font_getAscent(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	lua_pushnumber(L, t->getAscent());
	return 1;
}

int w_Font_getDescent(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	lua_pushnumber(L, t->getDescent());
	return 1;
}

int w_Font_getBaseline(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	lua_pushnumber(L, t->getBaseline());
	return 1;
}

int w_Font_hasGlyph(lua_State *L)
{
	Font *t = luax_checkfont(L, 1);
	bool hasglyph = false;

	try
	{
		if (lua_type(L, 2) == LUA_TSTRING)
			hasglyph = t->hasGlyph(luax_checkstring(L, 2));
		else
			hasglyph = t->hasGlyph((uint32) luaL_checknumber(L, 2));
	}
	catch (love::Exception &e)
	{
		return luaL_error(L, "%s", e.what());
	}

	luax_pushboolean(L, hasglyph);
	return 1;
}

static const luaL_Reg functions[] =
{
	{ "getHeight", w_Font_getHeight },
	{ "getWidth", w_Font_getWidth },
	{ "getWrap", w_Font_getWrap },
	{ "setLineHeight", w_Font_setLineHeight },
	{ "getLineHeight", w_Font_getLineHeight },
	{ "setFilter", w_Font_setFilter },
	{ "getFilter", w_Font_getFilter },
	{ "getAscent", w_Font_getAscent },
	{ "getDescent", w_Font_getDescent },
	{ "getBaseline", w_Font_getBaseline },
	{ "hasGlyph", w_Font_hasGlyph },
	{ 0, 0 }
};

extern "C" int luaopen_font(lua_State *L)
{
	return luax_register_type(L, "Font", functions);
}

} // opengl
} // graphics
} // love