bool StGLFontEntry::createTexture(StGLContext& theCtx) {
const GLint aMaxSize = theCtx.getMaxTextureSize();
GLint aGlyphsNb = 0;
if(myFont->hasCJK()
|| myFont->hasKorean()) {
// italic does not make sense for Chinese
// limit overall number of glyphs in the single texture to 4k
// (single font file might contain about 20k-50k glyphs)
aGlyphsNb = stMin(4000, 2 * myFont->getGlyphsNumber() - GLint(myLastTileId) + 1);
} else {
// western might contain reg/bold/italic/bolditalic styles
// limit overall number of glyphs in the single texture to 1k
// (single font file might contain about 6k glyphs for different languages)
aGlyphsNb = stMin(1000, 4 * myFont->getGlyphsNumber() - GLint(myLastTileId) + 1);
}
const GLsizei aTextureSizeX = getPowerOfTwo(aGlyphsNb * myTileSizeX, aMaxSize);
const size_t aTilesPerRow = aTextureSizeX / myTileSizeX;
GLsizei aTextureSizeY = stMin(getEvenNumber(GLint((aGlyphsNb / aTilesPerRow) + 1) * myTileSizeY), aMaxSize);
if(!theCtx.arbNPTW) {
aTextureSizeY = getPowerOfTwo(aTextureSizeY, aMaxSize);
}
stMemZero(&myLastTilePx, sizeof(myLastTilePx));
myLastTilePx.bottom() = myTileSizeY;
myTextures.add(new StGLTexture(theCtx.arbTexRG ? GL_R8 : GL_ALPHA));
myFbos.add(new StGLFrameBuffer());
StHandle<StGLTexture>& aTexture = myTextures[myTextures.size() - 1];
StHandle<StGLFrameBuffer>& aFbo = myFbos [myTextures.size() - 1];
if(!aTexture->initTrash(theCtx, aTextureSizeX, aTextureSizeY)) {
return false;
}
aTexture->bind(theCtx);
theCtx.core11fwd->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
theCtx.core11fwd->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
aTexture->unbind(theCtx);
// destruction of temporary FBO produces broken texture on Catalyst drivers for unknown reason
//StGLFrameBuffer::clearTexture(theCtx, aTexture);
#if !defined(GL_ES_VERSION_2_0)
if(theCtx.arbTexClear) {
theCtx.core11fwd->glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
theCtx.core11fwd->glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
theCtx.core11fwd->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
const stUByte_t THE_BLACK = 0;
theCtx.extAll->glClearTexImage(aTexture->getTextureId(), 0, theCtx.arbTexRG ? GL_RED : GL_ALPHA, GL_UNSIGNED_BYTE, &THE_BLACK);
} else if(aFbo->init(theCtx, aTexture, false)) {
aFbo->clearTexture(theCtx);
} else {
ST_ERROR_LOG("Fail to bind " + (theCtx.arbTexRG ? "GL_R8" : "GL_ALPHA8") + " texture to FBO!");
}
#else
(void )aFbo;
#endif
return true;
}
int OGS::getValue(Lotter inLotter) const
{
return getEvenNumber(inLotter.redBall).size();
}
