GrTexture* GrTextureProvider::internalRefScratchTexture(const GrSurfaceDesc& inDesc,
uint32_t flags) {
SkASSERT(!this->isAbandoned());
SkASSERT(!GrPixelConfigIsCompressed(inDesc.fConfig));
SkTCopyOnFirstWrite<GrSurfaceDesc> desc(inDesc);
if (fGpu->caps()->reuseScratchTextures() || (desc->fFlags & kRenderTarget_GrSurfaceFlag)) {
if (!(kExact_ScratchTextureFlag & flags)) {
// bin by pow2 with a reasonable min
const int minSize = SkTMin(16, fGpu->caps()->minTextureSize());
GrSurfaceDesc* wdesc = desc.writable();
wdesc->fWidth = SkTMax(minSize, GrNextPow2(desc->fWidth));
wdesc->fHeight = SkTMax(minSize, GrNextPow2(desc->fHeight));
}
GrScratchKey key;
GrTexturePriv::ComputeScratchKey(*desc, &key);
uint32_t scratchFlags = 0;
if (kNoPendingIO_ScratchTextureFlag & flags) {
scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
} else if (!(desc->fFlags & kRenderTarget_GrSurfaceFlag)) {
// If it is not a render target then it will most likely be populated by
// writePixels() which will trigger a flush if the texture has pending IO.
scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
}
GrGpuResource* resource = fCache->findAndRefScratchResource(key, scratchFlags);
if (resource) {
GrSurface* surface = static_cast<GrSurface*>(resource);
GrRenderTarget* rt = surface->asRenderTarget();
if (rt && fGpu->caps()->discardRenderTargetSupport()) {
rt->discard();
}
return surface->asTexture();
}
}
if (!(kNoCreate_ScratchTextureFlag & flags)) {
return fGpu->createTexture(*desc, true, NULL, 0);
}
return NULL;
}
