bool GrTextureUsageSupported(const GrCaps& caps, int width, int height, SkImageUsageType usage) {
if (caps.npotTextureTileSupport()) {
return true;
}
const bool is_pow2 = SkIsPow2(width) && SkIsPow2(height);
return is_pow2 || kUntiled_SkImageUsageType == usage;
}
void GrMakeKeyFromImageID(GrUniqueKey* key, uint32_t imageID,
U16CPU width, U16CPU height, SkIPoint origin,
const GrCaps& caps, SkImageUsageType usage) {
const Stretch::Type stretches[] = {
Stretch::kNone_Type, // kUntiled_SkImageUsageType
Stretch::kNearest_Type, // kTiled_Unfiltered_SkImageUsageType
Stretch::kBilerp_Type, // kTiled_Filtered_SkImageUsageType
};
const bool isPow2 = SkIsPow2(width) && SkIsPow2(height);
const bool needToStretch = !isPow2 &&
usage != kUntiled_SkImageUsageType &&
!caps.npotTextureTileSupport();
if (needToStretch) {
GrUniqueKey tmpKey;
make_unstretched_key(&tmpKey, imageID, width, height, origin);
Stretch stretch;
stretch.fType = stretches[usage];
stretch.fWidth = SkNextPow2(width);
stretch.fHeight = SkNextPow2(height);
if (!make_stretched_key(tmpKey, stretch, key)) {
goto UNSTRETCHED;
}
} else {
UNSTRETCHED:
make_unstretched_key(key, imageID, width, height, origin);
}
}