| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/platform/graphics/canvas_resource_provider.h" |
| |
| #include "base/bind.h" |
| #include "base/metrics/histogram_functions.h" |
| #include "base/stl_util.h" |
| #include "cc/paint/decode_stashing_image_provider.h" |
| #include "cc/tiles/software_image_decode_cache.h" |
| #include "components/viz/common/resources/resource_format_utils.h" |
| #include "gpu/command_buffer/common/capabilities.h" |
| #include "gpu/config/gpu_driver_bug_workaround_type.h" |
| #include "gpu/config/gpu_feature_info.h" |
| #include "third_party/blink/public/platform/platform.h" |
| #include "third_party/blink/renderer/platform/graphics/canvas_heuristic_parameters.h" |
| #include "third_party/blink/renderer/platform/graphics/gpu/shared_gpu_context.h" |
| #include "third_party/blink/renderer/platform/graphics/static_bitmap_image.h" |
| #include "third_party/skia/include/core/SkSurface.h" |
| |
| namespace blink { |
| |
| void CanvasResourceProvider::RecordTypeToUMA(ResourceProviderType type) { |
| base::UmaHistogramEnumeration("Blink.Canvas.ResourceProviderType", type); |
| } |
| |
| // * Renders to a texture managed by Skia. Mailboxes are backed by vanilla GL |
| // textures. |
| // * Layers are not overlay candidates. |
| class CanvasResourceProviderTexture : public CanvasResourceProvider { |
| public: |
| CanvasResourceProviderTexture( |
| const IntSize& size, |
| unsigned msaa_sample_count, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher, |
| bool is_origin_top_left) |
| : CanvasResourceProvider(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)), |
| msaa_sample_count_(msaa_sample_count), |
| is_origin_top_left_(is_origin_top_left) { |
| RecordTypeToUMA(kTexture); |
| } |
| |
| ~CanvasResourceProviderTexture() override = default; |
| |
| bool IsValid() const final { return GetSkSurface() && !IsGpuContextLost(); } |
| bool IsAccelerated() const final { return true; } |
| bool SupportsDirectCompositing() const override { return true; } |
| |
| GLuint GetBackingTextureHandleForOverwrite() override { |
| GrBackendTexture backend_texture = GetSkSurface()->getBackendTexture( |
| SkSurface::kDiscardWrite_TextureHandleAccess); |
| if (!backend_texture.isValid()) |
| return 0; |
| GrGLTextureInfo info; |
| if (!backend_texture.getGLTextureInfo(&info)) |
| return 0; |
| return info.fID; |
| } |
| |
| protected: |
| scoped_refptr<CanvasResource> ProduceCanvasResource() override { |
| TRACE_EVENT0("blink", |
| "CanvasResourceProviderTexture::ProduceCanvasResource"); |
| DCHECK(GetSkSurface()); |
| |
| if (IsGpuContextLost()) |
| return nullptr; |
| |
| auto* gl = ContextGL(); |
| DCHECK(gl); |
| |
| if (ContextProviderWrapper() |
| ->ContextProvider() |
| ->GetCapabilities() |
| .disable_2d_canvas_copy_on_write) { |
| // A readback operation may alter the texture parameters, which may affect |
| // the compositor's behavior. Therefore, we must trigger copy-on-write |
| // even though we are not technically writing to the texture, only to its |
| // parameters. This issue is Android-WebView specific: crbug.com/585250. |
| // If this issue with readback affecting state is ever fixed, then we'll |
| // have to do this instead of triggering a copy-on-write: |
| // static_cast<AcceleratedStaticBitmapImage*>(image.get()) |
| // ->RetainOriginalSkImageForCopyOnWrite(); |
| GetSkSurface()->notifyContentWillChange( |
| SkSurface::kRetain_ContentChangeMode); |
| } |
| |
| auto paint_image = MakeImageSnapshot(); |
| if (!paint_image) |
| return nullptr; |
| DCHECK(paint_image.GetSkImage()->isTextureBacked()); |
| |
| scoped_refptr<StaticBitmapImage> image = StaticBitmapImage::Create( |
| paint_image.GetSkImage(), ContextProviderWrapper()); |
| |
| scoped_refptr<CanvasResource> resource = CanvasResourceBitmap::Create( |
| image, CreateWeakPtr(), FilterQuality(), ColorParams()); |
| if (!resource) |
| return nullptr; |
| |
| return resource; |
| } |
| |
| scoped_refptr<StaticBitmapImage> Snapshot() override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderTexture::Snapshot"); |
| return SnapshotInternal(); |
| } |
| |
| sk_sp<SkSurface> CreateSkSurface() const override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderTexture::CreateSkSurface"); |
| if (IsGpuContextLost()) |
| return nullptr; |
| auto* gr = GetGrContext(); |
| DCHECK(gr); |
| |
| const SkImageInfo info = SkImageInfo::Make( |
| Size().Width(), Size().Height(), ColorParams().GetSkColorType(), |
| kPremul_SkAlphaType, ColorParams().GetSkColorSpaceForSkSurfaces()); |
| |
| const enum GrSurfaceOrigin surface_origin = |
| is_origin_top_left_ ? kTopLeft_GrSurfaceOrigin |
| : kBottomLeft_GrSurfaceOrigin; |
| |
| return SkSurface::MakeRenderTarget(gr, SkBudgeted::kNo, info, |
| msaa_sample_count_, surface_origin, |
| ColorParams().GetSkSurfaceProps()); |
| } |
| |
| const unsigned msaa_sample_count_; |
| const bool is_origin_top_left_; |
| }; |
| |
| // * Renders to a texture managed by Skia. Mailboxes are GPU-accelerated |
| // platform native surfaces. |
| // * Layers are overlay candidates. |
| class CanvasResourceProviderTextureGpuMemoryBuffer final |
| : public CanvasResourceProviderTexture { |
| public: |
| CanvasResourceProviderTextureGpuMemoryBuffer( |
| const IntSize& size, |
| unsigned msaa_sample_count, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher, |
| bool is_origin_top_left) |
| : CanvasResourceProviderTexture(size, |
| msaa_sample_count, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher), |
| is_origin_top_left) { |
| RecordTypeToUMA(kTextureGpuMemoryBuffer); |
| } |
| |
| ~CanvasResourceProviderTextureGpuMemoryBuffer() override = default; |
| bool SupportsDirectCompositing() const override { return true; } |
| bool SupportsSingleBuffering() const override { return true; } |
| |
| private: |
| scoped_refptr<CanvasResource> CreateResource() final { |
| TRACE_EVENT0( |
| "blink", |
| "CanvasResourceProviderTextureGpuMemoreBuffer::CreateResource"); |
| constexpr bool is_accelerated = true; |
| return CanvasResourceGpuMemoryBuffer::Create( |
| Size(), ColorParams(), ContextProviderWrapper(), CreateWeakPtr(), |
| FilterQuality(), is_accelerated); |
| } |
| |
| scoped_refptr<CanvasResource> ProduceCanvasResource() final { |
| TRACE_EVENT0( |
| "blink", |
| "CanvasResourceProviderTextureGpuMemoreBuffer::ProduceCanvasResource"); |
| DCHECK(GetSkSurface()); |
| |
| if (IsGpuContextLost()) |
| return nullptr; |
| |
| scoped_refptr<CanvasResource> output_resource = NewOrRecycledResource(); |
| if (!output_resource) { |
| // GpuMemoryBuffer creation failed, fallback to Texture resource |
| return CanvasResourceProviderTexture::ProduceCanvasResource(); |
| } |
| |
| auto paint_image = MakeImageSnapshot(); |
| if (!paint_image) |
| return nullptr; |
| DCHECK(paint_image.GetSkImage()->isTextureBacked()); |
| |
| GrBackendTexture backend_texture = |
| paint_image.GetSkImage()->getBackendTexture(true); |
| DCHECK(backend_texture.isValid()); |
| |
| GrGLTextureInfo info; |
| if (!backend_texture.getGLTextureInfo(&info)) |
| return nullptr; |
| |
| GLuint skia_texture_id = info.fID; |
| output_resource->CopyFromTexture(skia_texture_id, |
| ColorParams().GLUnsizedInternalFormat(), |
| ColorParams().GLType()); |
| return output_resource; |
| } |
| }; |
| |
| // * Renders to a Skia RAM-backed bitmap. |
| // * Mailboxing is not supported : cannot be directly composited. |
| class CanvasResourceProviderBitmap : public CanvasResourceProvider { |
| public: |
| CanvasResourceProviderBitmap( |
| const IntSize& size, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher) |
| : CanvasResourceProvider(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)) { |
| RecordTypeToUMA(kBitmap); |
| } |
| |
| ~CanvasResourceProviderBitmap() override = default; |
| |
| bool IsValid() const final { return GetSkSurface(); } |
| bool IsAccelerated() const final { return false; } |
| bool SupportsDirectCompositing() const override { return false; } |
| |
| private: |
| scoped_refptr<CanvasResource> ProduceCanvasResource() override { |
| return nullptr; // Does not support direct compositing |
| } |
| |
| scoped_refptr<StaticBitmapImage> Snapshot() override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderBitmap::Snapshot"); |
| return SnapshotInternal(); |
| } |
| |
| sk_sp<SkSurface> CreateSkSurface() const override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderBitmap::CreateSkSurface"); |
| |
| SkImageInfo info = SkImageInfo::Make( |
| Size().Width(), Size().Height(), ColorParams().GetSkColorType(), |
| kPremul_SkAlphaType, ColorParams().GetSkColorSpaceForSkSurfaces()); |
| return SkSurface::MakeRaster(info, ColorParams().GetSkSurfaceProps()); |
| } |
| }; |
| |
| // * Renders to a ram memory buffer managed by Skia |
| // * Uses GpuMemoryBuffer to pass frames to the compositor |
| // * Layers are overlay candidates |
| class CanvasResourceProviderBitmapGpuMemoryBuffer final |
| : public CanvasResourceProviderBitmap { |
| public: |
| CanvasResourceProviderBitmapGpuMemoryBuffer( |
| const IntSize& size, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher) |
| : CanvasResourceProviderBitmap(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)) { |
| RecordTypeToUMA(kBitmapGpuMemoryBuffer); |
| } |
| |
| ~CanvasResourceProviderBitmapGpuMemoryBuffer() override = default; |
| bool SupportsDirectCompositing() const override { return true; } |
| bool SupportsSingleBuffering() const override { return true; } |
| |
| private: |
| scoped_refptr<CanvasResource> CreateResource() final { |
| TRACE_EVENT0("blink", |
| "CanvasResourceProviderBitmapGpuMemoryBuffer::CreateResource"); |
| |
| constexpr bool is_accelerated = false; |
| return CanvasResourceGpuMemoryBuffer::Create( |
| Size(), ColorParams(), ContextProviderWrapper(), CreateWeakPtr(), |
| FilterQuality(), is_accelerated); |
| } |
| |
| scoped_refptr<CanvasResource> ProduceCanvasResource() final { |
| TRACE_EVENT0( |
| "blink", |
| "CanvasResourceProviderBitmapGpuMemoryBuffer::ProduceCanvasResource"); |
| |
| DCHECK(GetSkSurface()); |
| |
| scoped_refptr<CanvasResource> output_resource = NewOrRecycledResource(); |
| if (!output_resource) { |
| // Not compositable without a GpuMemoryBuffer |
| return nullptr; |
| } |
| |
| auto paint_image = MakeImageSnapshot(); |
| if (!paint_image) |
| return nullptr; |
| DCHECK(!paint_image.GetSkImage()->isTextureBacked()); |
| |
| output_resource->TakeSkImage(paint_image.GetSkImage()); |
| |
| return output_resource; |
| } |
| }; |
| |
| // * Renders to a shared memory bitmap. |
| // * Uses SharedBitmaps to pass frames directly to the compositor. |
| class CanvasResourceProviderSharedBitmap : public CanvasResourceProviderBitmap { |
| public: |
| CanvasResourceProviderSharedBitmap( |
| const IntSize& size, |
| const CanvasColorParams color_params, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher) |
| : CanvasResourceProviderBitmap(size, |
| color_params, |
| nullptr, // context_provider_wrapper |
| std::move(resource_dispatcher)) { |
| DCHECK(ResourceDispatcher()); |
| RecordTypeToUMA(kSharedBitmap); |
| } |
| ~CanvasResourceProviderSharedBitmap() override = default; |
| bool SupportsDirectCompositing() const override { return true; } |
| bool SupportsSingleBuffering() const override { return true; } |
| |
| private: |
| scoped_refptr<CanvasResource> CreateResource() final { |
| CanvasColorParams color_params = ColorParams(); |
| if (!IsBitmapFormatSupported(color_params.TransferableResourceFormat())) { |
| // If the rendering format is not supported, downgrate to 8-bits. |
| // TODO(junov): Should we try 12-12-12-12 and 10-10-10-2? |
| color_params.SetCanvasPixelFormat(kRGBA8CanvasPixelFormat); |
| } |
| |
| return CanvasResourceSharedBitmap::Create(Size(), color_params, |
| CreateWeakPtr(), FilterQuality()); |
| } |
| |
| scoped_refptr<CanvasResource> ProduceCanvasResource() final { |
| DCHECK(GetSkSurface()); |
| scoped_refptr<CanvasResource> output_resource = NewOrRecycledResource(); |
| if (!output_resource) |
| return nullptr; |
| |
| auto paint_image = MakeImageSnapshot(); |
| if (!paint_image) |
| return nullptr; |
| DCHECK(!paint_image.GetSkImage()->isTextureBacked()); |
| |
| output_resource->TakeSkImage(paint_image.GetSkImage()); |
| |
| return output_resource; |
| } |
| }; |
| |
| // * Renders to a GpuMemoryBuffer-backed texture used to create a SkSurface. |
| // * Layers are overlay candidates |
| class CanvasResourceProviderDirectGpuMemoryBuffer final |
| : public CanvasResourceProvider { |
| public: |
| CanvasResourceProviderDirectGpuMemoryBuffer( |
| const IntSize& size, |
| unsigned msaa_sample_count, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher, |
| bool is_origin_top_left) |
| : CanvasResourceProvider(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)), |
| msaa_sample_count_(msaa_sample_count), |
| is_origin_top_left_(is_origin_top_left) { |
| constexpr bool is_accelerated = true; |
| resource_ = CanvasResourceGpuMemoryBuffer::Create( |
| Size(), ColorParams(), ContextProviderWrapper(), CreateWeakPtr(), |
| FilterQuality(), is_accelerated); |
| } |
| |
| ~CanvasResourceProviderDirectGpuMemoryBuffer() override = default; |
| bool IsValid() const final { return GetSkSurface() && !IsGpuContextLost(); } |
| bool IsAccelerated() const final { return true; } |
| bool SupportsDirectCompositing() const override { return true; } |
| bool SupportsSingleBuffering() const override { return true; } |
| |
| private: |
| GLuint GetBackingTextureHandleForOverwrite() override { |
| return resource_->GetBackingTextureHandleForOverwrite(); |
| } |
| |
| scoped_refptr<CanvasResource> CreateResource() final { |
| TRACE_EVENT0("blink", |
| "CanvasResourceProviderDirectGpuMemoryBuffer::CreateResource"); |
| DCHECK(resource_); |
| return resource_; |
| } |
| |
| scoped_refptr<CanvasResource> ProduceCanvasResource() final { |
| TRACE_EVENT0( |
| "blink", |
| "CanvasResourceProviderDirectGpuMemoryBuffer::ProduceCanvasResource"); |
| if (IsGpuContextLost()) |
| return nullptr; |
| FlushSkia(); |
| |
| auto* gl = ContextGL(); |
| DCHECK(gl); |
| gl->Flush(); |
| |
| return NewOrRecycledResource(); |
| } |
| |
| scoped_refptr<StaticBitmapImage> Snapshot() override { |
| TRACE_EVENT0("blink", |
| "CanvasResourceProviderDirectGpuMemoryBuffer::Snapshot"); |
| return SnapshotInternal(); |
| } |
| |
| sk_sp<SkSurface> CreateSkSurface() const override { |
| if (IsGpuContextLost() || !resource_) |
| return nullptr; |
| auto* gr = GetGrContext(); |
| DCHECK(gr); |
| |
| GrGLTextureInfo texture_info = {}; |
| texture_info.fID = resource_->GetBackingTextureHandleForOverwrite(); |
| texture_info.fTarget = GL_TEXTURE_2D; |
| // Skia requires a sized internal format. |
| texture_info.fFormat = ColorParams().GLSizedInternalFormat(); |
| |
| const GrBackendTexture backend_texture(Size().Width(), Size().Height(), |
| GrMipMapped::kNo, texture_info); |
| |
| const enum GrSurfaceOrigin surface_origin = |
| is_origin_top_left_ ? kTopLeft_GrSurfaceOrigin |
| : kBottomLeft_GrSurfaceOrigin; |
| |
| auto surface = SkSurface::MakeFromBackendTextureAsRenderTarget( |
| gr, backend_texture, surface_origin, msaa_sample_count_, |
| ColorParams().GetSkColorType(), |
| ColorParams().GetSkColorSpaceForSkSurfaces(), |
| ColorParams().GetSkSurfaceProps()); |
| return surface; |
| } |
| |
| const unsigned msaa_sample_count_; |
| const bool is_origin_top_left_; |
| scoped_refptr<CanvasResource> resource_; |
| }; |
| |
| // * Renders to a SharedImage, which manage memory internally. |
| // * Layers are overlay candidates. |
| class CanvasResourceProviderSharedImage : public CanvasResourceProvider { |
| public: |
| CanvasResourceProviderSharedImage( |
| const IntSize& size, |
| unsigned msaa_sample_count, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher, |
| bool is_origin_top_left, |
| bool is_overlay_candidate) |
| : CanvasResourceProvider(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)), |
| msaa_sample_count_(msaa_sample_count), |
| is_origin_top_left_(is_origin_top_left), |
| is_overlay_candidate_(is_overlay_candidate) { |
| RecordTypeToUMA(kSharedImage); |
| resource_ = NewOrRecycledResource(); |
| } |
| |
| ~CanvasResourceProviderSharedImage() override {} |
| |
| bool IsValid() const final { return GetSkSurface() && !IsGpuContextLost(); } |
| bool IsAccelerated() const final { return true; } |
| bool SupportsDirectCompositing() const override { |
| return is_overlay_candidate_; |
| } |
| bool SupportsSingleBuffering() const override { return false; } |
| |
| scoped_refptr<CanvasResource> CreateResource() final { |
| TRACE_EVENT0("blink", "CanvasResourceProviderSharedImage::CreateResource"); |
| return CanvasResourceSharedImage::Create( |
| Size(), ContextProviderWrapper(), CreateWeakPtr(), FilterQuality(), |
| ColorParams(), is_overlay_candidate_); |
| } |
| |
| protected: |
| scoped_refptr<CanvasResource> ProduceCanvasResource() override { |
| TRACE_EVENT0("blink", |
| "CanvasResourceProviderSharedImage::ProduceCanvasResource"); |
| FlushSkia(); |
| |
| scoped_refptr<CanvasResource> resource = resource_; |
| if (ContextProviderWrapper() |
| ->ContextProvider() |
| ->GetCapabilities() |
| .disable_2d_canvas_copy_on_write) { |
| // A readback operation may alter the texture parameters, which may affect |
| // the compositor's behavior. Therefore, we must trigger copy-on-write |
| // even though we are not technically writing to the texture, only to its |
| // parameters. This issue is Android-WebView specific: crbug.com/585250. |
| WillDraw(); |
| } |
| |
| return resource_; |
| } |
| |
| scoped_refptr<StaticBitmapImage> Snapshot() override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderSharedImage::Snapshot"); |
| FlushSkia(); |
| return resource_->Bitmap(); |
| } |
| |
| void WillDraw() override { |
| DCHECK(resource_); |
| // If |resource_| is still being used by the compositor we need to create |
| // a new resource or reuse a previously recycled one. This class holds one |
| // reference so we check if there is more than one. |
| // NOTE: The case when calling handling StaticBitmapImage doesn't currently |
| // grab a reference but it needs to. See https://crbug.com/948133 |
| if (!resource_->HasOneRef()) { |
| FlushSkia(); |
| resource_ = NewOrRecycledResource(); |
| RecreateSkSurface(); |
| } |
| static_cast<CanvasResourceSharedImage*>(resource_.get())->WillDraw(); |
| } |
| |
| sk_sp<SkSurface> CreateSkSurface() const override { |
| TRACE_EVENT0("blink", "CanvasResourceProviderSharedImage::CreateSkSurface"); |
| if (IsGpuContextLost()) |
| return nullptr; |
| |
| GrGLTextureInfo texture_info = {}; |
| texture_info.fID = resource_->GetTextureIdForBackendTexture(); |
| texture_info.fTarget = resource_->TextureTarget(); |
| texture_info.fFormat = ColorParams().GLSizedInternalFormat(); |
| |
| const GrBackendTexture backend_texture(Size().Width(), Size().Height(), |
| GrMipMapped::kNo, texture_info); |
| |
| const enum GrSurfaceOrigin surface_origin = |
| is_origin_top_left_ ? kTopLeft_GrSurfaceOrigin |
| : kBottomLeft_GrSurfaceOrigin; |
| return SkSurface::MakeFromBackendTexture( |
| GetGrContext(), backend_texture, surface_origin, msaa_sample_count_, |
| ColorParams().GetSkColorType(), |
| ColorParams().GetSkColorSpaceForSkSurfaces(), |
| nullptr /*surface props*/); |
| } |
| |
| void RecreateSkSurface() { |
| auto old_surface = std::move(surface_); |
| surface_ = CreateSkSurface(); |
| InitializePaintCanvas(); |
| if (old_surface) { |
| SkPaint paint; |
| paint.setBlendMode(SkBlendMode::kSrc); |
| old_surface->draw(surface_->getCanvas(), 0, 0, &paint); |
| surface_->flush(); |
| } |
| } |
| |
| const unsigned msaa_sample_count_; |
| const bool is_origin_top_left_; |
| const bool is_overlay_candidate_; |
| scoped_refptr<CanvasResource> resource_; |
| }; |
| |
| // This class does nothing except answering to ProduceCanvasResource() by piping |
| // it to NewOrRecycledResource(). This ResourceProvider is meant to be used |
| // with an imported external CanvasResource, and all drawing and lifetime logic |
| // must be kept at a higher level. |
| class CanvasResourceProviderPassThrough final : public CanvasResourceProvider { |
| public: |
| CanvasResourceProviderPassThrough( |
| const IntSize& size, |
| const CanvasColorParams color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> |
| context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher) |
| : CanvasResourceProvider(size, |
| color_params, |
| std::move(context_provider_wrapper), |
| std::move(resource_dispatcher)) {} |
| |
| ~CanvasResourceProviderPassThrough() override = default; |
| bool IsValid() const final { return true; } |
| bool IsAccelerated() const final { return true; } |
| bool SupportsDirectCompositing() const override { return true; } |
| bool SupportsSingleBuffering() const override { return true; } |
| |
| private: |
| scoped_refptr<CanvasResource> CreateResource() final { |
| // This class has no CanvasResource to provide: this must be imported via |
| // ImportResource() and kept in the parent class. |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| scoped_refptr<CanvasResource> ProduceCanvasResource() final { |
| return NewOrRecycledResource(); |
| } |
| |
| sk_sp<SkSurface> CreateSkSurface() const override { |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| scoped_refptr<StaticBitmapImage> Snapshot() override { |
| NOTREACHED(); |
| return nullptr; |
| } |
| }; |
| |
| namespace { |
| |
| enum class CanvasResourceType { |
| kDirect3DGpuMemoryBuffer, |
| kDirect2DGpuMemoryBuffer, |
| kTextureGpuMemoryBuffer, |
| kBitmapGpuMemoryBuffer, |
| kSharedBitmap, |
| kTexture, |
| kBitmap, |
| kSharedImage, |
| }; |
| |
| const std::vector<CanvasResourceType>& GetResourceTypeFallbackList( |
| CanvasResourceProvider::ResourceUsage usage) { |
| static const std::vector<CanvasResourceType> kSoftwareFallbackList({ |
| CanvasResourceType::kBitmap, |
| }); |
| |
| static const std::vector<CanvasResourceType> kAcceleratedFallbackList({ |
| CanvasResourceType::kTexture, |
| // Fallback to software |
| CanvasResourceType::kBitmap, |
| }); |
| |
| static const std::vector<CanvasResourceType> kSoftwareCompositedFallbackList({ |
| CanvasResourceType::kBitmapGpuMemoryBuffer, |
| CanvasResourceType::kSharedBitmap, |
| // Fallback to no direct compositing support |
| CanvasResourceType::kBitmap, |
| }); |
| |
| static const std::vector<CanvasResourceType> |
| kAcceleratedCompositedFallbackList({ |
| // TODO(aaronhk) add CanvasResourceType::kSharedImage once resource |
| // recycling and copy on write is in place |
| CanvasResourceType::kTextureGpuMemoryBuffer, |
| CanvasResourceType::kTexture, |
| // Fallback to software composited |
| // (|kSoftwareCompositedFallbackList|). |
| CanvasResourceType::kBitmapGpuMemoryBuffer, |
| CanvasResourceType::kSharedBitmap, |
| // Fallback to no direct compositing support |
| CanvasResourceType::kBitmap, |
| }); |
| DCHECK(std::equal(kAcceleratedCompositedFallbackList.begin() + 2, |
| kAcceleratedCompositedFallbackList.end(), |
| kSoftwareCompositedFallbackList.begin(), |
| kSoftwareCompositedFallbackList.end())); |
| |
| static const std::vector<CanvasResourceType> kAcceleratedDirect2DFallbackList( |
| { |
| CanvasResourceType::kDirect2DGpuMemoryBuffer, |
| // The rest is equal to |kAcceleratedCompositedFallbackList|. |
| CanvasResourceType::kTextureGpuMemoryBuffer, |
| CanvasResourceType::kTexture, |
| // Fallback to software composited |
| CanvasResourceType::kBitmapGpuMemoryBuffer, |
| CanvasResourceType::kSharedBitmap, |
| // Fallback to no direct compositing support |
| CanvasResourceType::kBitmap, |
| }); |
| DCHECK(std::equal(kAcceleratedDirect2DFallbackList.begin() + 1, |
| kAcceleratedDirect2DFallbackList.end(), |
| kAcceleratedCompositedFallbackList.begin(), |
| kAcceleratedCompositedFallbackList.end())); |
| |
| static const std::vector<CanvasResourceType> kAcceleratedDirect3DFallbackList( |
| { |
| CanvasResourceType::kDirect3DGpuMemoryBuffer, |
| CanvasResourceType::kDirect2DGpuMemoryBuffer, |
| // The rest is equal to |kAcceleratedCompositedFallbackList|. |
| CanvasResourceType::kTextureGpuMemoryBuffer, |
| CanvasResourceType::kTexture, |
| // Fallback to software composited |
| CanvasResourceType::kBitmapGpuMemoryBuffer, |
| CanvasResourceType::kSharedBitmap, |
| // Fallback to no direct compositing support |
| CanvasResourceType::kBitmap, |
| }); |
| DCHECK(std::equal(kAcceleratedDirect3DFallbackList.begin() + 1, |
| kAcceleratedDirect3DFallbackList.end(), |
| kAcceleratedDirect2DFallbackList.begin(), |
| kAcceleratedDirect2DFallbackList.end())); |
| |
| // Temporal Fallback List for testing SharedImage before enabling it. |
| static const std::vector<CanvasResourceType> kSharedImageForTestFallbackList({ |
| CanvasResourceType::kSharedImage, |
| }); |
| |
| switch (usage) { |
| case CanvasResourceProvider::kSoftwareResourceUsage: |
| return kSoftwareFallbackList; |
| case CanvasResourceProvider::kSoftwareCompositedResourceUsage: |
| return kSoftwareCompositedFallbackList; |
| case CanvasResourceProvider::kAcceleratedResourceUsage: |
| return kAcceleratedFallbackList; |
| case CanvasResourceProvider::kAcceleratedCompositedResourceUsage: |
| return kAcceleratedCompositedFallbackList; |
| case CanvasResourceProvider::kAcceleratedDirect2DResourceUsage: |
| return kAcceleratedDirect2DFallbackList; |
| case CanvasResourceProvider::kAcceleratedDirect3DResourceUsage: |
| return kAcceleratedDirect3DFallbackList; |
| case CanvasResourceProvider::kCreateSharedImageForTesting: |
| return kSharedImageForTestFallbackList; |
| } |
| NOTREACHED(); |
| } |
| } // unnamed namespace |
| |
| std::unique_ptr<CanvasResourceProvider> CanvasResourceProvider::Create( |
| const IntSize& size, |
| ResourceUsage usage, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> context_provider_wrapper, |
| unsigned msaa_sample_count, |
| const CanvasColorParams& color_params, |
| PresentationMode presentation_mode, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher, |
| bool is_origin_top_left) { |
| std::unique_ptr<CanvasResourceProvider> provider; |
| const std::vector<CanvasResourceType>& fallback_list = |
| GetResourceTypeFallbackList(usage); |
| |
| const bool is_gpu_memory_buffer_image_allowed = |
| SharedGpuContext::IsGpuCompositingEnabled() && context_provider_wrapper && |
| presentation_mode == kAllowImageChromiumPresentationMode && |
| gpu::IsImageSizeValidForGpuMemoryBufferFormat( |
| gfx::Size(size), color_params.GetBufferFormat()) && |
| gpu::IsImageFromGpuMemoryBufferFormatSupported( |
| color_params.GetBufferFormat(), |
| context_provider_wrapper->ContextProvider()->GetCapabilities()); |
| |
| for (CanvasResourceType resource_type : fallback_list) { |
| // Note: We are deliberately not using std::move() on |
| // |context_provider_wrapper| and |resource_dispatcher| to ensure that the |
| // pointers remain valid for the next iteration of this loop if necessary. |
| switch (resource_type) { |
| case CanvasResourceType::kTextureGpuMemoryBuffer: |
| if (!is_gpu_memory_buffer_image_allowed) |
| continue; |
| DCHECK_EQ(color_params.GLUnsizedInternalFormat(), |
| gpu::InternalFormatForGpuMemoryBufferFormat( |
| color_params.GetBufferFormat())); |
| provider = |
| std::make_unique<CanvasResourceProviderTextureGpuMemoryBuffer>( |
| size, msaa_sample_count, color_params, context_provider_wrapper, |
| resource_dispatcher, is_origin_top_left); |
| break; |
| case CanvasResourceType::kDirect2DGpuMemoryBuffer: |
| if (!is_gpu_memory_buffer_image_allowed) |
| continue; |
| DCHECK_EQ(color_params.GLUnsizedInternalFormat(), |
| gpu::InternalFormatForGpuMemoryBufferFormat( |
| color_params.GetBufferFormat())); |
| provider = |
| std::make_unique<CanvasResourceProviderDirectGpuMemoryBuffer>( |
| size, msaa_sample_count, color_params, context_provider_wrapper, |
| resource_dispatcher, is_origin_top_left); |
| break; |
| case CanvasResourceType::kDirect3DGpuMemoryBuffer: |
| if (!is_gpu_memory_buffer_image_allowed) |
| continue; |
| DCHECK_EQ(color_params.GLUnsizedInternalFormat(), |
| gpu::InternalFormatForGpuMemoryBufferFormat( |
| color_params.GetBufferFormat())); |
| provider = std::make_unique<CanvasResourceProviderPassThrough>( |
| size, color_params, context_provider_wrapper, resource_dispatcher); |
| break; |
| case CanvasResourceType::kBitmapGpuMemoryBuffer: |
| if (!is_gpu_memory_buffer_image_allowed || |
| !Platform::Current()->GetGpuMemoryBufferManager()) { |
| continue; |
| } |
| provider = |
| std::make_unique<CanvasResourceProviderBitmapGpuMemoryBuffer>( |
| size, color_params, context_provider_wrapper, |
| resource_dispatcher); |
| break; |
| case CanvasResourceType::kSharedBitmap: |
| if (!resource_dispatcher) |
| continue; |
| provider = std::make_unique<CanvasResourceProviderSharedBitmap>( |
| size, color_params, resource_dispatcher); |
| break; |
| case CanvasResourceType::kTexture: |
| if (!context_provider_wrapper) |
| continue; |
| provider = std::make_unique<CanvasResourceProviderTexture>( |
| size, msaa_sample_count, color_params, context_provider_wrapper, |
| resource_dispatcher, is_origin_top_left); |
| break; |
| case CanvasResourceType::kBitmap: |
| provider = std::make_unique<CanvasResourceProviderBitmap>( |
| size, color_params, context_provider_wrapper, resource_dispatcher); |
| break; |
| case CanvasResourceType::kSharedImage: |
| provider = std::make_unique<CanvasResourceProviderSharedImage>( |
| size, msaa_sample_count, color_params, context_provider_wrapper, |
| resource_dispatcher, is_origin_top_left, false); |
| break; |
| } |
| if (!provider->IsValid()) |
| continue; |
| base::UmaHistogramBoolean("Blink.Canvas.ResourceProviderIsAccelerated", |
| provider->IsAccelerated()); |
| return provider; |
| } |
| |
| return nullptr; |
| } |
| |
| class CanvasResourceProvider::CanvasImageProvider : public cc::ImageProvider { |
| public: |
| CanvasImageProvider(cc::ImageDecodeCache* cache_n32, |
| cc::ImageDecodeCache* cache_f16, |
| const gfx::ColorSpace& target_color_space, |
| SkColorType target_color_type, |
| bool is_hardware_decode_cache); |
| ~CanvasImageProvider() override = default; |
| |
| // cc::ImageProvider implementation. |
| cc::ImageProvider::ScopedResult GetRasterContent( |
| const cc::DrawImage&) override; |
| |
| void ReleaseLockedImages() { locked_images_.clear(); } |
| |
| private: |
| void CanUnlockImage(ScopedResult); |
| void CleanupLockedImages(); |
| |
| bool is_hardware_decode_cache_; |
| bool cleanup_task_pending_ = false; |
| std::vector<ScopedResult> locked_images_; |
| cc::PlaybackImageProvider playback_image_provider_n32_; |
| base::Optional<cc::PlaybackImageProvider> playback_image_provider_f16_; |
| |
| base::WeakPtrFactory<CanvasImageProvider> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CanvasImageProvider); |
| }; |
| |
| CanvasResourceProvider::CanvasImageProvider::CanvasImageProvider( |
| cc::ImageDecodeCache* cache_n32, |
| cc::ImageDecodeCache* cache_f16, |
| const gfx::ColorSpace& target_color_space, |
| SkColorType canvas_color_type, |
| bool is_hardware_decode_cache) |
| : is_hardware_decode_cache_(is_hardware_decode_cache), |
| playback_image_provider_n32_(cache_n32, |
| target_color_space, |
| cc::PlaybackImageProvider::Settings()), |
| weak_factory_(this) { |
| // If the image provider may require to decode to half float instead of |
| // uint8, create a f16 PlaybackImageProvider with the passed cache. |
| if (canvas_color_type == kRGBA_F16_SkColorType) { |
| DCHECK(cache_f16); |
| playback_image_provider_f16_.emplace(cache_f16, target_color_space, |
| cc::PlaybackImageProvider::Settings()); |
| } |
| } |
| |
| cc::ImageProvider::ScopedResult |
| CanvasResourceProvider::CanvasImageProvider::GetRasterContent( |
| const cc::DrawImage& draw_image) { |
| // TODO(xidachen): Ensure this function works for paint worklet generated |
| // images. |
| // If we like to decode high bit depth image source to half float backed |
| // image, we need to sniff the image bit depth here to avoid double decoding. |
| ImageProvider::ScopedResult scoped_decoded_image; |
| if (playback_image_provider_f16_ && |
| draw_image.paint_image().is_high_bit_depth()) { |
| DCHECK(playback_image_provider_f16_); |
| scoped_decoded_image = |
| playback_image_provider_f16_->GetRasterContent(draw_image); |
| } else { |
| scoped_decoded_image = |
| playback_image_provider_n32_.GetRasterContent(draw_image); |
| } |
| |
| // Holding onto locked images here is a performance optimization for the |
| // gpu image decode cache. For that cache, it is expensive to lock and |
| // unlock gpu discardable, and so it is worth it to hold the lock on |
| // these images across multiple potential decodes. In the software case, |
| // locking in this manner makes it easy to run out of discardable memory |
| // (backed by shared memory sometimes) because each per-colorspace image |
| // decode cache has its own limit. In the software case, just unlock |
| // immediately and let the discardable system manage the cache logic |
| // behind the scenes. |
| if (!scoped_decoded_image.needs_unlock() || !is_hardware_decode_cache_) { |
| return scoped_decoded_image; |
| } |
| |
| constexpr int kMaxLockedImagesCount = 500; |
| if (!scoped_decoded_image.decoded_image().is_budgeted() || |
| locked_images_.size() > kMaxLockedImagesCount) { |
| // If we have exceeded the budget, ReleaseLockedImages any locked decodes. |
| ReleaseLockedImages(); |
| } |
| |
| auto decoded_draw_image = scoped_decoded_image.decoded_image(); |
| return ScopedResult(decoded_draw_image, |
| base::BindOnce(&CanvasImageProvider::CanUnlockImage, |
| weak_factory_.GetWeakPtr(), |
| std::move(scoped_decoded_image))); |
| } |
| |
| void CanvasResourceProvider::CanvasImageProvider::CanUnlockImage( |
| ScopedResult image) { |
| // We should early out and avoid calling this function for software decodes. |
| DCHECK(is_hardware_decode_cache_); |
| |
| // Because these image decodes are being done in javascript calling into |
| // canvas code, there's no obvious time to do the cleanup. To handle this, |
| // post a cleanup task to run after javascript is done running. |
| if (!cleanup_task_pending_) { |
| cleanup_task_pending_ = true; |
| Thread::Current()->GetTaskRunner()->PostTask( |
| FROM_HERE, base::BindOnce(&CanvasImageProvider::CleanupLockedImages, |
| weak_factory_.GetWeakPtr())); |
| } |
| |
| locked_images_.push_back(std::move(image)); |
| } |
| |
| void CanvasResourceProvider::CanvasImageProvider::CleanupLockedImages() { |
| cleanup_task_pending_ = false; |
| ReleaseLockedImages(); |
| } |
| |
| CanvasResourceProvider::CanvasResourceProvider( |
| const IntSize& size, |
| const CanvasColorParams& color_params, |
| base::WeakPtr<WebGraphicsContext3DProviderWrapper> context_provider_wrapper, |
| base::WeakPtr<CanvasResourceDispatcher> resource_dispatcher) |
| : context_provider_wrapper_(std::move(context_provider_wrapper)), |
| resource_dispatcher_(resource_dispatcher), |
| size_(size), |
| color_params_(color_params), |
| snapshot_paint_image_id_(cc::PaintImage::GetNextId()), |
| weak_ptr_factory_(this) { |
| if (context_provider_wrapper_) |
| context_provider_wrapper_->AddObserver(this); |
| } |
| |
| CanvasResourceProvider::~CanvasResourceProvider() { |
| if (context_provider_wrapper_) |
| context_provider_wrapper_->RemoveObserver(this); |
| } |
| |
| SkSurface* CanvasResourceProvider::GetSkSurface() const { |
| if (!surface_) |
| surface_ = CreateSkSurface(); |
| return surface_.get(); |
| } |
| |
| void CanvasResourceProvider::InitializePaintCanvas() { |
| // Since canvas_ has a reference to canvas_image_provider_, canvas must be |
| // deleted before the image_provider. |
| canvas_ = nullptr; |
| canvas_image_provider_ = nullptr; |
| |
| // Create an ImageDecodeCache for half float images only if the canvas is |
| // using half float back storage. |
| cc::ImageDecodeCache* cache_f16 = nullptr; |
| if (ColorParams().PixelFormat() == kF16CanvasPixelFormat) |
| cache_f16 = ImageDecodeCacheF16(); |
| canvas_image_provider_ = std::make_unique<CanvasImageProvider>( |
| ImageDecodeCacheRGBA8(), cache_f16, gfx::ColorSpace::CreateSRGB(), |
| color_params_.GetSkColorType(), use_hardware_decode_cache()); |
| |
| cc::SkiaPaintCanvas::ContextFlushes context_flushes; |
| if (IsAccelerated() && |
| !ContextProviderWrapper() |
| ->ContextProvider() |
| ->GetGpuFeatureInfo() |
| .IsWorkaroundEnabled(gpu::DISABLE_2D_CANVAS_AUTO_FLUSH)) { |
| context_flushes.enable = |
| canvas_heuristic_parameters::kEnableGrContextFlushes; |
| context_flushes.max_draws_before_flush = |
| canvas_heuristic_parameters::kMaxDrawsBeforeContextFlush; |
| } |
| canvas_ = std::make_unique<cc::SkiaPaintCanvas>(GetSkSurface()->getCanvas(), |
| canvas_image_provider_.get(), |
| context_flushes); |
| } |
| |
| cc::PaintCanvas* CanvasResourceProvider::Canvas() { |
| WillDraw(); |
| |
| if (!canvas_) { |
| TRACE_EVENT0("blink", "CanvasResourceProvider::Canvas"); |
| DCHECK(!canvas_image_provider_); |
| InitializePaintCanvas(); |
| } |
| return canvas_.get(); |
| } |
| |
| void CanvasResourceProvider::OnContextDestroyed() { |
| if (canvas_image_provider_) { |
| DCHECK(canvas_); |
| canvas_->reset_image_provider(); |
| canvas_image_provider_.reset(); |
| } |
| } |
| |
| void CanvasResourceProvider::ReleaseLockedImages() { |
| if (canvas_image_provider_) |
| canvas_image_provider_->ReleaseLockedImages(); |
| } |
| |
| scoped_refptr<StaticBitmapImage> CanvasResourceProvider::SnapshotInternal() { |
| if (!IsValid()) |
| return nullptr; |
| |
| auto paint_image = MakeImageSnapshot(); |
| if (paint_image.GetSkImage()->isTextureBacked() && ContextProviderWrapper()) { |
| return StaticBitmapImage::Create(paint_image.GetSkImage(), |
| ContextProviderWrapper()); |
| } |
| return StaticBitmapImage::Create(std::move(paint_image)); |
| } |
| |
| cc::PaintImage CanvasResourceProvider::MakeImageSnapshot() { |
| auto sk_image = GetSkSurface()->makeImageSnapshot(); |
| if (!sk_image) |
| return cc::PaintImage(); |
| |
| auto last_snapshot_sk_image_id = snapshot_sk_image_id_; |
| snapshot_sk_image_id_ = sk_image->uniqueID(); |
| |
| // Ensure that a new PaintImage::ContentId is used only when the underlying |
| // SkImage changes. This is necessary to ensure that the same image results |
| // in a cache hit in cc's ImageDecodeCache. |
| if (snapshot_paint_image_content_id_ == PaintImage::kInvalidContentId || |
| last_snapshot_sk_image_id != snapshot_sk_image_id_) { |
| snapshot_paint_image_content_id_ = PaintImage::GetNextContentId(); |
| } |
| |
| return PaintImageBuilder::WithDefault() |
| .set_id(snapshot_paint_image_id_) |
| .set_image(std::move(sk_image), snapshot_paint_image_content_id_) |
| .TakePaintImage(); |
| } |
| |
| gpu::gles2::GLES2Interface* CanvasResourceProvider::ContextGL() const { |
| if (!context_provider_wrapper_) |
| return nullptr; |
| return context_provider_wrapper_->ContextProvider()->ContextGL(); |
| } |
| |
| GrContext* CanvasResourceProvider::GetGrContext() const { |
| if (!context_provider_wrapper_) |
| return nullptr; |
| return context_provider_wrapper_->ContextProvider()->GetGrContext(); |
| } |
| |
| void CanvasResourceProvider::FlushSkia() const { |
| GetSkSurface()->flush(); |
| } |
| |
| bool CanvasResourceProvider::IsGpuContextLost() const { |
| auto* gl = ContextGL(); |
| return !gl || gl->GetGraphicsResetStatusKHR() != GL_NO_ERROR; |
| } |
| |
| bool CanvasResourceProvider::WritePixels(const SkImageInfo& orig_info, |
| const void* pixels, |
| size_t row_bytes, |
| int x, |
| int y) { |
| TRACE_EVENT0("blink", "CanvasResourceProvider::WritePixels"); |
| |
| DCHECK(IsValid()); |
| return GetSkSurface()->getCanvas()->writePixels(orig_info, pixels, row_bytes, |
| x, y); |
| } |
| |
| void CanvasResourceProvider::Clear() { |
| // Clear the background transparent or opaque, as required. It would be nice |
| // if this wasn't required, but the canvas is currently filled with the magic |
| // transparency color. Can we have another way to manage this? |
| DCHECK(IsValid()); |
| if (color_params_.GetOpacityMode() == kOpaque) |
| Canvas()->clear(SK_ColorBLACK); |
| else |
| Canvas()->clear(SK_ColorTRANSPARENT); |
| } |
| |
| uint32_t CanvasResourceProvider::ContentUniqueID() const { |
| return GetSkSurface()->generationID(); |
| } |
| |
| scoped_refptr<CanvasResource> CanvasResourceProvider::CreateResource() { |
| // Needs to be implemented in subclasses that use resource recycling. |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| cc::ImageDecodeCache* CanvasResourceProvider::ImageDecodeCacheRGBA8() { |
| |
| if (use_hardware_decode_cache()) { |
| return context_provider_wrapper_->ContextProvider()->ImageDecodeCache( |
| kN32_SkColorType, ColorParams().GetSkColorSpace()); |
| } |
| |
| return Image::SharedCCDecodeCache(ColorParams().ColorSpace(), |
| kRGBA8CanvasPixelFormat); |
| } |
| |
| cc::ImageDecodeCache* CanvasResourceProvider::ImageDecodeCacheF16() { |
| |
| if (use_hardware_decode_cache()) { |
| return context_provider_wrapper_->ContextProvider()->ImageDecodeCache( |
| kRGBA_F16_SkColorType, ColorParams().GetSkColorSpace()); |
| } |
| return Image::SharedCCDecodeCache(ColorParams().ColorSpace(), |
| kF16CanvasPixelFormat); |
| } |
| |
| void CanvasResourceProvider::RecycleResource( |
| scoped_refptr<CanvasResource> resource) { |
| // Need to check HasOneRef() because if there are outstanding references to |
| // the resource, it cannot be safely recycled. |
| if (resource->HasOneRef() && resource_recycling_enabled_) |
| canvas_resources_.push_back(std::move(resource)); |
| } |
| |
| void CanvasResourceProvider::SetResourceRecyclingEnabled(bool value) { |
| resource_recycling_enabled_ = value; |
| if (!resource_recycling_enabled_) |
| ClearRecycledResources(); |
| } |
| |
| void CanvasResourceProvider::ClearRecycledResources() { |
| canvas_resources_.clear(); |
| } |
| |
| scoped_refptr<CanvasResource> CanvasResourceProvider::NewOrRecycledResource() { |
| if (canvas_resources_.IsEmpty()) |
| canvas_resources_.push_back(CreateResource()); |
| |
| if (IsSingleBuffered()) { |
| DCHECK_EQ(canvas_resources_.size(), 1u); |
| return canvas_resources_.back(); |
| } |
| |
| scoped_refptr<CanvasResource> resource = std::move(canvas_resources_.back()); |
| canvas_resources_.pop_back(); |
| return resource; |
| } |
| |
| void CanvasResourceProvider::TryEnableSingleBuffering() { |
| if (IsSingleBuffered() || !SupportsSingleBuffering()) |
| return; |
| SetResourceRecyclingEnabled(false); |
| } |
| |
| bool CanvasResourceProvider::ImportResource( |
| scoped_refptr<CanvasResource> resource) { |
| if (!IsSingleBuffered() || !SupportsSingleBuffering()) |
| return false; |
| canvas_resources_.clear(); |
| canvas_resources_.push_back(std::move(resource)); |
| return true; |
| } |
| |
| } // namespace blink |
