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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTextureProvider.h"
#include "GrTexturePriv.h"
#include "GrResourceCache.h"
#include "GrGpu.h"
enum ScratchTextureFlags {
kExact_ScratchTextureFlag = 0x1,
kNoPendingIO_ScratchTextureFlag = 0x2,
kNoCreate_ScratchTextureFlag = 0x4,
};
GrTexture* GrTextureProvider::createTexture(const GrSurfaceDesc& desc, bool budgeted,
const void* srcData, size_t rowBytes) {
if (this->isAbandoned()) {
return nullptr;
}
if ((desc.fFlags & kRenderTarget_GrSurfaceFlag) &&
!fGpu->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
return nullptr;
}
if (!GrPixelConfigIsCompressed(desc.fConfig)) {
static const uint32_t kFlags = kExact_ScratchTextureFlag |
kNoCreate_ScratchTextureFlag;
if (GrTexture* texture = this->refScratchTexture(desc, kFlags)) {
if (!srcData || texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig,
srcData, rowBytes)) {
if (!budgeted) {
texture->resourcePriv().makeUnbudgeted();
}
return texture;
}
texture->unref();
}
}
return fGpu->createTexture(desc, budgeted, srcData, rowBytes);
}
GrTexture* GrTextureProvider::createApproxTexture(const GrSurfaceDesc& desc) {
return this->internalCreateApproxTexture(desc, 0);
}
GrTexture* GrTextureProvider::internalCreateApproxTexture(const GrSurfaceDesc& desc,
uint32_t scratchFlags) {
if (this->isAbandoned()) {
return nullptr;
}
// Currently we don't recycle compressed textures as scratch.
if (GrPixelConfigIsCompressed(desc.fConfig)) {
return nullptr;
} else {
return this->refScratchTexture(desc, scratchFlags);
}
}
GrTexture* GrTextureProvider::refScratchTexture(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,
GrSurface::WorseCaseSize(*desc),
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, nullptr, 0);
}
return nullptr;
}
GrTexture* GrTextureProvider::wrapBackendTexture(const GrBackendTextureDesc& desc,
GrWrapOwnership ownership) {
if (this->isAbandoned()) {
return nullptr;
}
return fGpu->wrapBackendTexture(desc, ownership);
}
GrRenderTarget* GrTextureProvider::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
return this->isAbandoned() ? nullptr : fGpu->wrapBackendRenderTarget(desc,
kBorrow_GrWrapOwnership);
}
void GrTextureProvider::assignUniqueKeyToResource(const GrUniqueKey& key, GrGpuResource* resource) {
if (this->isAbandoned() || !resource) {
return;
}
resource->resourcePriv().setUniqueKey(key);
}
bool GrTextureProvider::existsResourceWithUniqueKey(const GrUniqueKey& key) const {
return this->isAbandoned() ? false : fCache->hasUniqueKey(key);
}
GrGpuResource* GrTextureProvider::findAndRefResourceByUniqueKey(const GrUniqueKey& key) {
return this->isAbandoned() ? nullptr : fCache->findAndRefUniqueResource(key);
}
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