| /* |
| * 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 "GrBackendTextureImageGenerator.h" |
| |
| #include "GrContext.h" |
| #include "GrContextPriv.h" |
| #include "GrGpu.h" |
| #include "GrProxyProvider.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrResourceCache.h" |
| #include "GrResourceProvider.h" |
| #include "GrResourceProviderPriv.h" |
| #include "GrSemaphore.h" |
| #include "GrTexture.h" |
| #include "GrTexturePriv.h" |
| #include "GrTextureProxyPriv.h" |
| |
| #include "SkGr.h" |
| #include "SkMessageBus.h" |
| |
| GrBackendTextureImageGenerator::RefHelper::~RefHelper() { |
| SkASSERT(nullptr == fBorrowedTexture); |
| |
| // 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. |
| GrGpuResourceFreedMessage msg { fOriginalTexture, fOwningContextID }; |
| SkMessageBus<GrGpuResourceFreedMessage>::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->contextPriv().getResourceCache()->insertCrossContextGpuResource(texture.get()); |
| |
| GrBackendTexture backendTexture = texture->getBackendTexture(); |
| if (!context->contextPriv().caps()->validateBackendTexture(backendTexture, colorType, |
| &backendTexture.fConfig)) { |
| 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->uniqueID(), 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) |
| , fConfig(backendTex.config()) |
| , fSurfaceOrigin(origin) { } |
| |
| GrBackendTextureImageGenerator::~GrBackendTextureImageGenerator() { |
| fRefHelper->unref(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| void GrBackendTextureImageGenerator::ReleaseRefHelper_TextureReleaseProc(void* ctx) { |
| RefHelper* refHelper = static_cast<RefHelper*>(ctx); |
| SkASSERT(refHelper); |
| |
| refHelper->fBorrowedTexture = nullptr; |
| refHelper->fBorrowingContextReleaseProc = nullptr; |
| refHelper->fBorrowingContextID = SK_InvalidGenID; |
| refHelper->unref(); |
| } |
| |
| sk_sp<GrTextureProxy> GrBackendTextureImageGenerator::onGenerateTexture( |
| GrContext* context, const SkImageInfo& info, const SkIPoint& origin, |
| SkTransferFunctionBehavior, bool willNeedMipMaps) { |
| SkASSERT(context); |
| |
| if (context->contextPriv().getBackend() != fBackendTexture.backend()) { |
| return nullptr; |
| } |
| if (info.colorType() != this->getInfo().colorType()) { |
| return nullptr; |
| } |
| |
| auto proxyProvider = context->contextPriv().proxyProvider(); |
| |
| fBorrowingMutex.acquire(); |
| sk_sp<GrReleaseProcHelper> releaseProcHelper; |
| if (SK_InvalidGenID != fRefHelper->fBorrowingContextID) { |
| if (fRefHelper->fBorrowingContextID != context->uniqueID()) { |
| 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 |
| // GrReleaseProcHelper. |
| fRefHelper->ref(); |
| releaseProcHelper.reset(new GrReleaseProcHelper(ReleaseRefHelper_TextureReleaseProc, |
| fRefHelper)); |
| fRefHelper->fBorrowingContextReleaseProc = releaseProcHelper.get(); |
| } |
| fRefHelper->fBorrowingContextID = context->uniqueID(); |
| fBorrowingMutex.release(); |
| |
| SkASSERT(fRefHelper->fBorrowingContextID == context->uniqueID()); |
| |
| GrSurfaceDesc desc; |
| desc.fWidth = fBackendTexture.width(); |
| desc.fHeight = fBackendTexture.height(); |
| desc.fConfig = fConfig; |
| GrMipMapped mipMapped = fBackendTexture.hasMipMaps() ? GrMipMapped::kYes : GrMipMapped::kNo; |
| |
| // Must make copies of member variables to capture in the lambda since this image generator may |
| // be deleted before we actuallly execute the lambda. |
| sk_sp<GrSemaphore> semaphore = fSemaphore; |
| GrBackendTexture backendTexture = fBackendTexture; |
| RefHelper* refHelper = fRefHelper; |
| |
| sk_sp<GrTextureProxy> proxy = proxyProvider->createLazyProxy( |
| [refHelper, releaseProcHelper, semaphore, |
| backendTexture](GrResourceProvider* resourceProvider) { |
| if (!resourceProvider) { |
| return sk_sp<GrTexture>(); |
| } |
| |
| if (semaphore) { |
| resourceProvider->priv().gpu()->waitSemaphore(semaphore); |
| } |
| |
| sk_sp<GrTexture> tex; |
| if (refHelper->fBorrowedTexture) { |
| // 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. |
| tex = sk_ref_sp(refHelper->fBorrowedTexture); |
| SkASSERT(tex); |
| } 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. |
| tex = resourceProvider->wrapBackendTexture(backendTexture, |
| kBorrow_GrWrapOwnership); |
| if (!tex) { |
| return sk_sp<GrTexture>(); |
| } |
| refHelper->fBorrowedTexture = tex.get(); |
| |
| tex->setRelease(releaseProcHelper); |
| } |
| |
| return tex; |
| |
| }, |
| desc, fSurfaceOrigin, mipMapped, SkBackingFit::kExact, SkBudgeted::kNo); |
| |
| 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; |
| |
| sk_sp<GrRenderTargetContext> rtContext( |
| context->contextPriv().makeDeferredRenderTargetContext( |
| SkBackingFit::kExact, info.width(), info.height(), proxy->config(), nullptr, 1, |
| mipMapped, proxy->origin(), nullptr, SkBudgeted::kYes)); |
| |
| if (!rtContext) { |
| return nullptr; |
| } |
| |
| SkIRect subset = SkIRect::MakeXYWH(origin.fX, origin.fY, info.width(), info.height()); |
| if (!rtContext->copy(proxy.get(), subset, SkIPoint::Make(0, 0))) { |
| return nullptr; |
| } |
| |
| return rtContext->asTextureProxyRef(); |
| } |
| } |
| |
