Removed mipmap support from Font graphics objects

src/modules/graphics/opengl/Font.cpp

@@ -48,7 +48,6 @@ Font::Font(love::font::Rasterizer *r, const Image::Filter &filter)
 	, lineHeight(1)
 	, mSpacing(1)
 	, filter(filter)
-	, mipmapsharpness(0.0f)
 {
 	// try to find the best texture size match for the font size
 	// default to the largest texture size if no rough match is found
@@ -125,8 +124,8 @@ void Font::createTexture()
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 
-	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
 	GLint format = (type == FONT_TRUETYPE ? GL_LUMINANCE_ALPHA : GL_RGBA);
 
@@ -167,7 +166,6 @@ void Font::createTexture()
 					&emptyData[0]);
 
 	setFilter(filter);
-	setMipmapSharpness(mipmapsharpness);
 }
 
 Font::Glyph *Font::addGlyph(unsigned int glyph)
@@ -498,39 +496,6 @@ float Font::getSpacing() const
 	return mSpacing;
 }
 
-void Font::checkMipmapsCreated() const
-{
-	if (filter.mipmap != Image::FILTER_NEAREST && filter.mipmap != Image::FILTER_LINEAR)
-		return;
-
-	if (!Image::hasMipmapSupport())
-		throw love::Exception("Mipmap filtering is not supported on this system!");
-
-	GLint mipmapscreated;
-	glGetTexParameteriv(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, &mipmapscreated);
-
-	// generate mipmaps for this image if we haven't already
-	if (!mipmapscreated)
-	{
-		glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
-
-		if (GLEE_VERSION_3_0 || GLEE_ARB_framebuffer_object)
-			glGenerateMipmap(GL_TEXTURE_2D);
-		else
-		{
-			// modify single texel to trigger mipmap chain generation
-			std::vector<GLubyte> emptydata(type == FONT_TRUETYPE ? 2 : 4);
-			glTexSubImage2D(GL_TEXTURE_2D,
-							0,
-							0, 0,
-							1, 1,
-							type == FONT_TRUETYPE ? GL_LUMINANCE_ALPHA : GL_RGBA,
-							GL_UNSIGNED_BYTE,
-							&emptydata[0]);
-		}
-	}
-}
-
 void Font::setFilter(const Image::Filter &f)
 {
 	filter = f;
@@ -539,7 +504,6 @@ void Font::setFilter(const Image::Filter &f)
 	for (it = textures.begin(); it != textures.end(); ++it)
 	{
 		bindTexture(*it);
-		checkMipmapsCreated();
 		setTextureFilter(f);
 	}
 }
@@ -549,32 +513,8 @@ const Image::Filter &Font::getFilter()
 	return filter;
 }
 
-void Font::setMipmapSharpness(float sharpness)
-{
-	if (!Image::hasMipmapSharpnessSupport())
-		return;
-
-	// LOD bias has the range (-maxbias, maxbias)
-	mipmapsharpness = std::min(std::max(sharpness, -maxmipmapsharpness + 0.01f), maxmipmapsharpness - 0.01f);
-
-	std::vector<GLuint>::const_iterator it;
-	for (it = textures.begin(); it != textures.end(); ++it)
-	{
-		bindTexture(*it);
-		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -mipmapsharpness); // negative bias is sharper
-	}
-}
-
-float Font::getMipmapSharpness() const
-{
-	return mipmapsharpness;
-}
-
 bool Font::loadVolatile()
 {
-	if (Image::hasMipmapSharpnessSupport())
-		glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS, &maxmipmapsharpness);
-
 	createTexture();
 	return true;
 }

src/modules/graphics/opengl/Font.h

@@ -129,9 +129,6 @@ public:
 	void setFilter(const Image::Filter &f);
 	const Image::Filter &getFilter();
 
-	void setMipmapSharpness(float sharpness);
-	float getMipmapSharpness() const;
-
 	// Implements Volatile.
 	bool loadVolatile();
 	void unloadVolatile();
@@ -204,14 +201,6 @@ private:
 	int texture_x, texture_y;
 	int rowHeight;
 
-	// Mipmap texture LOD bias value
-	float mipmapsharpness;
-
-	// Implementation-dependent maximum/minimum mipmap sharpness values
-	float maxmipmapsharpness;
-
-	void checkMipmapsCreated() const;
-
 	bool initializeTexture(GLint format);
 	void createTexture();
 	Glyph *addGlyph(unsigned int glyph);

src/modules/graphics/opengl/wrap_Font.cpp

@@ -128,63 +128,6 @@ int w_Font_getFilter(lua_State *L)
 	return 2;
 }
 
-int w_Font_setMipmapFilter(lua_State *L)
-{
-	Font *t = luax_checkfont(L, 1);
-	Image::Filter f = t->getFilter();
-
-	if (lua_isnoneornil(L, 2))
-		f.mipmap = Image::FILTER_NONE; // mipmapping is disabled if no argument is given
-	else
-	{
-		const char *mipmapstr = luaL_checkstring(L, 2);
-		if (!Image::getConstant(mipmapstr, f.mipmap))
-			return luaL_error(L, "Invalid filter mode: %s", mipmapstr);
-	}
-
-	try
-	{
-		t->setFilter(f);
-	}
-	catch(love::Exception &e)
-	{
-		return luaL_error(L, "%s", e.what());
-	}
-	
-	return 0;
-}
-
-int w_Font_getMipmapFilter(lua_State *L)
-{
-	Font *t = luax_checkfont(L, 1);
-	const Image::Filter f = t->getFilter();
-
-	const char *mipmapstr;
-	if (!Image::getConstant(f.mipmap, mipmapstr))
-		return 0; // only return a mipmap filter if mipmapping is enabled
-
-	lua_pushstring(L, mipmapstr);
-
-	return 1;
-}
-
-int w_Font_setMipmapSharpness(lua_State *L)
-{
-	Font *t = luax_checkfont(L, 1);
-
-	float sharpness = (float) luaL_checknumber(L, 2);
-	t->setMipmapSharpness(sharpness);
-
-	return 0;
-}
-
-int w_Font_getMipmapSharpness(lua_State *L)
-{
-	Font *t = luax_checkfont(L, 1);
-	lua_pushnumber(L, t->getMipmapSharpness());
-	return 1;
-}
-
 int w_Font_getAscent(lua_State *L)
 {
 	Font *t = luax_checkfont(L, 1);
@@ -215,10 +158,6 @@ static const luaL_Reg functions[] =
 	{ "getLineHeight", w_Font_getLineHeight },
 	{ "setFilter", w_Font_setFilter },
 	{ "getFilter", w_Font_getFilter },
-	{ "setMipmapFilter", w_Font_setMipmapFilter },
-	{ "getMipmapFilter", w_Font_getMipmapFilter },
-	{ "setMipmapSharpness", w_Font_setMipmapSharpness },
-	{ "getMipmapSharpness", w_Font_getMipmapSharpness },
 	{ "getAscent", w_Font_getAscent },
 	{ "getDescent", w_Font_getDescent },
 	{ "getBaseline", w_Font_getBaseline },

src/modules/graphics/opengl/wrap_Font.h

@@ -40,10 +40,6 @@ int w_Font_setLineHeight(lua_State *L);
 int w_Font_getLineHeight(lua_State *L);
 int w_Font_setFilter(lua_State *L);
 int w_Font_getFilter(lua_State *L);
-int w_Font_setMipmapFilter(lua_State *L);
-int w_Font_getMipmapFilter(lua_State *L);
-int w_Font_setMipmapSharpness(lua_State *L);
-int w_Font_getMipmapSharpness(lua_State *L);
 int w_Font_getAscent(lua_State *L);
 int w_Font_getDescent(lua_State *L);
 int w_Font_getBaseline(lua_State *L);