| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/gpu/GrContext.h" |
| #include "include/gpu/GrTexture.h" |
| #include "include/private/GrRecordingContext.h" |
| #include "src/core/SkMessageBus.h" |
| #include "src/gpu/GrBackendTextureImageGenerator.h" |
| #include "src/gpu/GrContextPriv.h" |
| #include "src/gpu/GrGpu.h" |
| #include "src/gpu/GrProxyProvider.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| #include "src/gpu/GrResourceCache.h" |
| #include "src/gpu/GrResourceProvider.h" |
| #include "src/gpu/GrResourceProviderPriv.h" |
| #include "src/gpu/GrSemaphore.h" |
| #include "src/gpu/GrTexturePriv.h" |
| #include "src/gpu/GrTextureProxyPriv.h" |
| #include "src/gpu/SkGr.h" |
| #include "src/gpu/gl/GrGLTexture.h" |
| |
| GrBackendTextureImageGenerator::RefHelper::RefHelper(GrTexture* texture, uint32_t owningContextID) |
| : fOriginalTexture(texture) |
| , fOwningContextID(owningContextID) |
| , fBorrowingContextReleaseProc(nullptr) |
| , fBorrowingContextID(SK_InvalidGenID) {} |
| |
| GrBackendTextureImageGenerator::RefHelper::~RefHelper() { |
| SkASSERT(fBorrowingContextID == SK_InvalidUniqueID); |
| |
| // Generator has been freed, and no one is borrowing the texture. Notify the original cache |
| // that it can free the last ref, so it happens on the correct thread. |
| GrTextureFreedMessage msg { fOriginalTexture, fOwningContextID }; |
| SkMessageBus<GrTextureFreedMessage>::Post(msg); |
| } |
| |
| std::unique_ptr<SkImageGenerator> |
| GrBackendTextureImageGenerator::Make(sk_sp<GrTexture> texture, GrSurfaceOrigin origin, |
| sk_sp<GrSemaphore> semaphore, SkColorType colorType, |
| SkAlphaType alphaType, sk_sp<SkColorSpace> colorSpace) { |
| GrContext* context = texture->getContext(); |
| |
| // Attach our texture to this context's resource cache. This ensures that deletion will happen |
| // in the correct thread/context. This adds the only ref to the texture that will persist from |
| // this point. That ref will be released when the generator's RefHelper is freed. |
| context->priv().getResourceCache()->insertDelayedTextureUnref(texture.get()); |
| |
| GrBackendTexture backendTexture = texture->getBackendTexture(); |
| |
| if (!context->priv().caps()->areColorTypeAndFormatCompatible( |
| SkColorTypeToGrColorType(colorType), backendTexture.getBackendFormat())) { |
| return nullptr; |
| } |
| |
| SkImageInfo info = SkImageInfo::Make(texture->width(), texture->height(), colorType, alphaType, |
| std::move(colorSpace)); |
| return std::unique_ptr<SkImageGenerator>(new GrBackendTextureImageGenerator( |
| info, texture.get(), origin, context->priv().contextID(), |
| std::move(semaphore), backendTexture)); |
| } |
| |
| GrBackendTextureImageGenerator::GrBackendTextureImageGenerator(const SkImageInfo& info, |
| GrTexture* texture, |
| GrSurfaceOrigin origin, |
| uint32_t owningContextID, |
| sk_sp<GrSemaphore> semaphore, |
| const GrBackendTexture& backendTex) |
| : INHERITED(info) |
| , fRefHelper(new RefHelper(texture, owningContextID)) |
| , fSemaphore(std::move(semaphore)) |
| , fBackendTexture(backendTex) |
| , fSurfaceOrigin(origin) {} |
| |
| GrBackendTextureImageGenerator::~GrBackendTextureImageGenerator() { |
| fRefHelper->unref(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| void GrBackendTextureImageGenerator::ReleaseRefHelper_TextureReleaseProc(void* ctx) { |
| RefHelper* refHelper = static_cast<RefHelper*>(ctx); |
| SkASSERT(refHelper); |
| |
| refHelper->fBorrowingContextReleaseProc = nullptr; |
| refHelper->fBorrowingContextID = SK_InvalidGenID; |
| refHelper->unref(); |
| } |
| |
| sk_sp<GrTextureProxy> GrBackendTextureImageGenerator::onGenerateTexture( |
| GrRecordingContext* context, const SkImageInfo& info, |
| const SkIPoint& origin, bool willNeedMipMaps) { |
| SkASSERT(context); |
| |
| if (context->backend() != fBackendTexture.backend()) { |
| return nullptr; |
| } |
| if (info.colorType() != this->getInfo().colorType()) { |
| return nullptr; |
| } |
| |
| auto proxyProvider = context->priv().proxyProvider(); |
| const GrCaps* caps = context->priv().caps(); |
| |
| fBorrowingMutex.acquire(); |
| sk_sp<GrRefCntedCallback> releaseProcHelper; |
| if (SK_InvalidGenID != fRefHelper->fBorrowingContextID) { |
| if (fRefHelper->fBorrowingContextID != context->priv().contextID()) { |
| fBorrowingMutex.release(); |
| return nullptr; |
| } else { |
| SkASSERT(fRefHelper->fBorrowingContextReleaseProc); |
| // Ref the release proc to be held by the proxy we make below |
| releaseProcHelper = sk_ref_sp(fRefHelper->fBorrowingContextReleaseProc); |
| } |
| } else { |
| SkASSERT(!fRefHelper->fBorrowingContextReleaseProc); |
| // The ref we add to fRefHelper here will be passed into and owned by the |
| // GrRefCntedCallback. |
| fRefHelper->ref(); |
| releaseProcHelper.reset( |
| new GrRefCntedCallback(ReleaseRefHelper_TextureReleaseProc, fRefHelper)); |
| fRefHelper->fBorrowingContextReleaseProc = releaseProcHelper.get(); |
| } |
| fRefHelper->fBorrowingContextID = context->priv().contextID(); |
| if (!fRefHelper->fBorrowedTextureKey.isValid()) { |
| static const auto kDomain = GrUniqueKey::GenerateDomain(); |
| GrUniqueKey::Builder builder(&fRefHelper->fBorrowedTextureKey, kDomain, 1); |
| builder[0] = this->uniqueID(); |
| } |
| fBorrowingMutex.release(); |
| |
| SkASSERT(fRefHelper->fBorrowingContextID == context->priv().contextID()); |
| |
| GrBackendFormat backendFormat = fBackendTexture.getBackendFormat(); |
| SkASSERT(backendFormat.isValid()); |
| |
| GrColorType grColorType = SkColorTypeToGrColorType(info.colorType()); |
| |
| GrPixelConfig config = caps->getConfigFromBackendFormat(backendFormat, grColorType); |
| if (kUnknown_GrPixelConfig == config) { |
| return nullptr; |
| } |
| |
| GrSurfaceDesc desc; |
| desc.fWidth = fBackendTexture.width(); |
| desc.fHeight = fBackendTexture.height(); |
| desc.fConfig = config; |
| GrMipMapped mipMapped = fBackendTexture.hasMipMaps() ? GrMipMapped::kYes : GrMipMapped::kNo; |
| |
| // Ganesh assumes that, when wrapping a mipmapped backend texture from a client, that its |
| // mipmaps are fully fleshed out. |
| GrMipMapsStatus mipMapsStatus = fBackendTexture.hasMipMaps() |
| ? GrMipMapsStatus::kValid : GrMipMapsStatus::kNotAllocated; |
| |
| // Must make copies of member variables to capture in the lambda since this image generator may |
| // be deleted before we actually execute the lambda. |
| sk_sp<GrTextureProxy> proxy = proxyProvider->createLazyProxy( |
| [refHelper = fRefHelper, releaseProcHelper, semaphore = fSemaphore, |
| backendTexture = fBackendTexture, grColorType]( |
| GrResourceProvider* resourceProvider) -> GrSurfaceProxy::LazyCallbackResult { |
| if (semaphore) { |
| resourceProvider->priv().gpu()->waitSemaphore(semaphore); |
| } |
| |
| // If a client re-draws the same image multiple times, the texture we return |
| // will be cached and re-used. If they draw a subset, though, we may be |
| // re-called. In that case, we want to re-use the borrowed texture we've |
| // previously created. |
| sk_sp<GrTexture> tex; |
| SkASSERT(refHelper->fBorrowedTextureKey.isValid()); |
| auto surf = resourceProvider->findByUniqueKey<GrSurface>( |
| refHelper->fBorrowedTextureKey); |
| if (surf) { |
| SkASSERT(surf->asTexture()); |
| tex = sk_ref_sp(surf->asTexture()); |
| } else { |
| // We just gained access to the texture. If we're on the original context, we |
| // could use the original texture, but we'd have no way of detecting that it's |
| // no longer in-use. So we always make a wrapped copy, where the release proc |
| // informs us that the context is done with it. This is unfortunate - we'll have |
| // two texture objects referencing the same GPU object. However, no client can |
| // ever see the original texture, so this should be safe. |
| // We make the texture uncacheable so that the release proc is called ASAP. |
| tex = resourceProvider->wrapBackendTexture( |
| backendTexture, grColorType, kBorrow_GrWrapOwnership, |
| GrWrapCacheable::kNo, kRead_GrIOType); |
| if (!tex) { |
| return {}; |
| } |
| tex->setRelease(releaseProcHelper); |
| tex->resourcePriv().setUniqueKey(refHelper->fBorrowedTextureKey); |
| } |
| // We use keys to avoid re-wrapping the GrBackendTexture in a GrTexture. This is |
| // unrelated to the whatever SkImage key may be assigned to the proxy. |
| return {std::move(tex), true, GrSurfaceProxy::LazyInstantiationKeyMode::kUnsynced}; |
| }, |
| backendFormat, desc, GrRenderable::kNo, 1, fSurfaceOrigin, mipMapped, mipMapsStatus, |
| GrInternalSurfaceFlags::kReadOnly, SkBackingFit::kExact, SkBudgeted::kNo, |
| GrProtected::kNo, GrSurfaceProxy::UseAllocator::kYes); |
| if (!proxy) { |
| return nullptr; |
| } |
| |
| if (0 == origin.fX && 0 == origin.fY && |
| info.width() == fBackendTexture.width() && info.height() == fBackendTexture.height() && |
| (!willNeedMipMaps || GrMipMapped::kYes == proxy->mipMapped())) { |
| // If the caller wants the entire texture and we have the correct mip support, we're done |
| return proxy; |
| } else { |
| // Otherwise, make a copy of the requested subset. Make sure our temporary is renderable, |
| // because Vulkan will want to do the copy as a draw. All other copies would require a |
| // layout change in Vulkan and we do not change the layout of borrowed images. |
| GrMipMapped mipMapped = willNeedMipMaps ? GrMipMapped::kYes : GrMipMapped::kNo; |
| SkIRect subset = SkIRect::MakeXYWH(origin.fX, origin.fY, info.width(), info.height()); |
| |
| return GrSurfaceProxy::Copy(context, proxy.get(), grColorType, mipMapped, subset, |
| SkBackingFit::kExact, SkBudgeted::kYes); |
| } |
| } |
