static void graphics_Font_newTexture(graphics_Font* font) {
/* Upload the "bitmap", which contains an 8-bit grayscale image, as an alpha texture */
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, &font->tex);
glBindTexture(GL_TEXTURE_2D, font->tex);
FT_Bitmap b = font->face->glyph->bitmap;
uint8_t *buf = malloc(2*b.rows*b.width);
uint8_t *row = b.buffer;
for(int i = 0; i < b.rows; ++i) {
for(int c = 0; c < b.width; ++c) {
buf[2*(i*b.width + c) ] = 255;
buf[2*(i*b.width + c) + 1] = row[c];
}
row += b.pitch;
}
graphics_Font_setWrap(font, &defaultWrap);
graphics_Font_setFilter(font, &defaultFilter);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, b.width, b.rows,
0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, buf);
free(buf);
}
static int l_graphics_Font_setFilter(lua_State* state) {
l_assertType(state, 1, l_graphics_isFont);
graphics_Font* font = l_graphics_toFont(state, 1);
graphics_Filter newFilter;
graphics_Font_getFilter(font, &newFilter);
newFilter.minMode = l_tools_toEnumOrError(state, 2, l_graphics_FilterMode);
newFilter.magMode = l_tools_toEnumOrError(state, 3, l_graphics_FilterMode);
newFilter.maxAnisotropy = luaL_optnumber(state, 4, 1.0f);
graphics_Font_setFilter(font, &newFilter);
return 0;
}
