Exemple #1
0
GLuint CFontTextureRenderer::CreateTexture()
{
//FIXME add support to expand the texture size to the right and not only to the bottom
	ApproximateTextureWidth(&texWidth,&texHeight);

	atlas = new unsigned char[texWidth * texHeight];
	memset(atlas,0,texWidth * texHeight);
	cur = atlas;

	//! sort the glyphs by height to gain a few pixels
	sortByHeight.sort(sortByHeightFunc);

	//! insert `outlined/shadowed` glyphs
	CopyGlyphsIntoBitmapAtlas(true);

	//! blur `outlined/shadowed` glyphs
	CBitmap blurbmp;
	blurbmp.channels = 1;
	blurbmp.xsize = texWidth;
	blurbmp.ysize = curY+curHeight;
	if (blurbmp.mem == NULL) {
		blurbmp.mem = atlas;
		blurbmp.Blur(outlinewidth,outlineweight);
		blurbmp.mem = NULL;
	}

	//! adjust outline weight
	/*for (int y = 0; y < curY+curHeight; y++) {
		unsigned char* src = atlas + y * texWidth;
		for (int x = 0; x < texWidth; x++) {
			unsigned char luminance = src[x];
			src[x] = (unsigned char)std::min(0xFF, outlineweight * luminance);
		}
	}*/

	//! insert `normal` glyphs
	CopyGlyphsIntoBitmapAtlas();

	//! generate the ogl texture
	texHeight = curY + curHeight;
	if (!GLEW_ARB_texture_non_power_of_two)
		texHeight = next_power_of_2(texHeight);
	GLuint tex;
	glGenTextures(1, &tex);
	glBindTexture(GL_TEXTURE_2D, tex);
<<<<<<< HEAD:rts/Rendering/glFont.cpp
Exemple #2
0
GLuint CFontTextureRenderer::CreateTexture()
{
//FIXME add support to expand the texture size to the right and not only to the bottom
	ApproximateTextureWidth(&texWidth,&texHeight);

	atlas = new unsigned char[texWidth * texHeight];
	memset(atlas,0,texWidth * texHeight);
	cur = atlas;

	//! sort the glyphs by height to gain a few pixels
	sortByHeight.sort(sortByHeightFunc);

	//! insert `outlined/shadowed` glyphs
	CopyGlyphsIntoBitmapAtlas(true);

	//! blur `outlined/shadowed` glyphs
	CBitmap blurbmp;
	blurbmp.channels = 1;
	blurbmp.xsize = texWidth;
	blurbmp.ysize = curY+curHeight;
	if (blurbmp.mem == NULL) {
		blurbmp.mem = atlas;
		blurbmp.Blur(outlinewidth,outlineweight);
		blurbmp.mem = NULL;
	}

	//! adjust outline weight
	/*for (int y = 0; y < curY+curHeight; y++) {
		unsigned char* src = atlas + y * texWidth;
		for (int x = 0; x < texWidth; x++) {
			unsigned char luminance = src[x];
			src[x] = (unsigned char)std::min(0xFF, outlineweight * luminance);
		}
	}*/

	//! insert `normal` glyphs
	CopyGlyphsIntoBitmapAtlas();

	//! generate the ogl texture
	texHeight = curY + curHeight;
	if (!gu->supportNPOTs)
		texHeight = next_power_of_2(texHeight);
	GLuint tex;
	glGenTextures(1, &tex);
	glBindTexture(GL_TEXTURE_2D, tex);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	if (GLEW_ARB_texture_border_clamp) {
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
	}
	else {
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
	}
	static const GLfloat borderColor[4] = {1.0f,1.0f,1.0f,0.0f};
	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texWidth, texHeight, 0, GL_ALPHA, GL_UNSIGNED_BYTE, atlas);
	delete[] atlas;

	return tex;
}