| // Copyright 2016 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 "platform/graphics/OffscreenCanvasFrameDispatcherImpl.h" |
| |
| #include "cc/output/compositor_frame.h" |
| #include "cc/output/delegated_frame_data.h" |
| #include "cc/quads/render_pass.h" |
| #include "cc/quads/shared_quad_state.h" |
| #include "cc/quads/solid_color_draw_quad.h" |
| #include "cc/quads/texture_draw_quad.h" |
| #include "cc/resources/returned_resource.h" |
| #include "gpu/command_buffer/client/gles2_interface.h" |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/graphics/gpu/SharedGpuContext.h" |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "public/platform/InterfaceProvider.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebGraphicsContext3DProvider.h" |
| #include "public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom-blink.h" |
| #include "third_party/khronos/GLES2/gl2.h" |
| #include "third_party/khronos/GLES2/gl2ext.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "third_party/skia/include/core/SkImage.h" |
| #include "third_party/skia/include/core/SkXfermode.h" |
| #include "ui/gfx/geometry/rect.h" |
| #include "ui/gfx/transform.h" |
| #include "wtf/typed_arrays/ArrayBuffer.h" |
| #include "wtf/typed_arrays/Uint8Array.h" |
| |
| namespace blink { |
| |
| OffscreenCanvasFrameDispatcherImpl::OffscreenCanvasFrameDispatcherImpl( |
| uint32_t clientId, |
| uint32_t localId, |
| uint64_t nonce, |
| int width, |
| int height) |
| : m_surfaceId(cc::FrameSinkId(clientId, 0 /* sink_id */), localId, nonce), |
| m_width(width), |
| m_height(height), |
| m_nextResourceId(1u), |
| m_binding(this) { |
| DCHECK(!m_sink.is_bound()); |
| mojom::blink::OffscreenCanvasCompositorFrameSinkProviderPtr provider; |
| Platform::current()->interfaceProvider()->getInterface( |
| mojo::GetProxy(&provider)); |
| provider->CreateCompositorFrameSink(m_surfaceId, |
| m_binding.CreateInterfacePtrAndBind(), |
| mojo::GetProxy(&m_sink)); |
| } |
| |
| // Case 1: both canvas and compositor are not gpu accelerated. |
| void OffscreenCanvasFrameDispatcherImpl::setTransferableResourceInMemory( |
| cc::TransferableResource& resource, |
| RefPtr<StaticBitmapImage> image) { |
| std::unique_ptr<cc::SharedBitmap> bitmap = |
| Platform::current()->allocateSharedBitmap(IntSize(m_width, m_height)); |
| if (!bitmap) |
| return; |
| unsigned char* pixels = bitmap->pixels(); |
| DCHECK(pixels); |
| SkImageInfo imageInfo = SkImageInfo::Make( |
| m_width, m_height, kN32_SkColorType, |
| image->isPremultiplied() ? kPremul_SkAlphaType : kUnpremul_SkAlphaType); |
| // TODO(xlai): Optimize to avoid copying pixels. See crbug.com/651456. |
| image->imageForCurrentFrame()->readPixels(imageInfo, pixels, |
| imageInfo.minRowBytes(), 0, 0); |
| resource.mailbox_holder.mailbox = bitmap->id(); |
| resource.mailbox_holder.texture_target = 0; |
| resource.is_software = true; |
| |
| // Hold ref to |bitmap|, to keep it alive until the browser ReturnResources. |
| // It guarantees that the shared bitmap is not re-used or deleted. |
| m_sharedBitmaps.add(m_nextResourceId, std::move(bitmap)); |
| } |
| |
| // Case 2: canvas is not gpu-accelerated, but compositor is |
| void OffscreenCanvasFrameDispatcherImpl::setTransferableResourceMemoryToTexture( |
| cc::TransferableResource& resource, |
| RefPtr<StaticBitmapImage> image) { |
| // TODO(crbug.com/652707): When committing the first frame, there is no |
| // instance of SharedGpuContext yet, calling SharedGpuContext::gl() will |
| // trigger a creation of an instace, which requires to create a |
| // WebGraphicsContext3DProvider. This process is quite expensive, because |
| // WebGraphicsContext3DProvider can only be constructed on the main thread, |
| // and bind to the worker thread if commit() is called on worker. In the |
| // subsequent frame, we should already have a SharedGpuContext, then getting |
| // the gl interface should not be expensive. |
| gpu::gles2::GLES2Interface* gl = SharedGpuContext::gl(); |
| |
| SkImageInfo info = SkImageInfo::Make( |
| m_width, m_height, kN32_SkColorType, |
| image->isPremultiplied() ? kPremul_SkAlphaType : kUnpremul_SkAlphaType); |
| RefPtr<ArrayBuffer> dstBuffer = |
| ArrayBuffer::createOrNull(m_width * m_height, info.bytesPerPixel()); |
| // If it fails to create a buffer for copying the pixel data, then exit early. |
| if (!dstBuffer) |
| return; |
| RefPtr<Uint8Array> dstPixels = |
| Uint8Array::create(dstBuffer, 0, dstBuffer->byteLength()); |
| image->imageForCurrentFrame()->readPixels(info, dstPixels->data(), |
| info.minRowBytes(), 0, 0); |
| |
| GLuint textureId = 0u; |
| gl->GenTextures(1, &textureId); |
| gl->BindTexture(GL_TEXTURE_2D, textureId); |
| GLenum format = |
| (kN32_SkColorType == kRGBA_8888_SkColorType) ? GL_RGBA : GL_BGRA_EXT; |
| gl->TexImage2D(GL_TEXTURE_2D, 0, format, m_width, m_height, 0, format, |
| GL_UNSIGNED_BYTE, 0); |
| gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| // The pixel data will be uploaded to GPU memory, we have to keep the GPU |
| // memory alive until browser ReturnResources, so here we put textureId for |
| // that piece of GPU memory into a hashmap. |
| m_cachedTextureIds.add(m_nextResourceId, textureId); |
| gl->TexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_width, m_height, format, |
| GL_UNSIGNED_BYTE, dstPixels->data()); |
| |
| gpu::Mailbox mailbox; |
| gl->GenMailboxCHROMIUM(mailbox.name); |
| gl->ProduceTextureCHROMIUM(GL_TEXTURE_2D, mailbox.name); |
| |
| const GLuint64 fenceSync = gl->InsertFenceSyncCHROMIUM(); |
| gl->ShallowFlushCHROMIUM(); |
| gpu::SyncToken syncToken; |
| gl->GenSyncTokenCHROMIUM(fenceSync, syncToken.GetData()); |
| |
| resource.mailbox_holder = |
| gpu::MailboxHolder(mailbox, syncToken, GL_TEXTURE_2D); |
| resource.read_lock_fences_enabled = false; |
| resource.is_software = false; |
| } |
| |
| // Case 3: both canvas and compositor are gpu accelerated. |
| void OffscreenCanvasFrameDispatcherImpl::setTransferableResourceInTexture( |
| cc::TransferableResource& resource, |
| RefPtr<StaticBitmapImage> image) { |
| image->ensureMailbox(); |
| resource.mailbox_holder = gpu::MailboxHolder( |
| image->getMailbox(), image->getSyncToken(), GL_TEXTURE_2D); |
| resource.read_lock_fences_enabled = false; |
| resource.is_software = false; |
| |
| // Hold ref to |image|, to keep it alive until the browser ReturnResources. |
| // It guarantees that the resource is not re-used or deleted. |
| m_cachedImages.add(m_nextResourceId, std::move(image)); |
| } |
| |
| void OffscreenCanvasFrameDispatcherImpl::dispatchFrame( |
| RefPtr<StaticBitmapImage> image) { |
| if (!image) |
| return; |
| if (!verifyImageSize(image->imageForCurrentFrame())) |
| return; |
| cc::CompositorFrame frame; |
| frame.metadata.device_scale_factor = 1.0f; |
| frame.delegated_frame_data.reset(new cc::DelegatedFrameData); |
| |
| const gfx::Rect bounds(m_width, m_height); |
| const cc::RenderPassId renderPassId(1, 1); |
| std::unique_ptr<cc::RenderPass> pass = cc::RenderPass::Create(); |
| pass->SetAll(renderPassId, bounds, bounds, gfx::Transform(), false); |
| |
| cc::SharedQuadState* sqs = pass->CreateAndAppendSharedQuadState(); |
| sqs->SetAll(gfx::Transform(), bounds.size(), bounds, bounds, false, 1.f, |
| SkXfermode::kSrcOver_Mode, 0); |
| |
| cc::TransferableResource resource; |
| resource.id = m_nextResourceId; |
| resource.format = cc::ResourceFormat::RGBA_8888; |
| // TODO(crbug.com/645590): filter should respect the image-rendering CSS |
| // property of associated canvas element. |
| resource.filter = GL_LINEAR; |
| resource.size = gfx::Size(m_width, m_height); |
| // TODO(crbug.com/646022): making this overlay-able. |
| resource.is_overlay_candidate = false; |
| |
| if (!image->isTextureBacked() && |
| !RuntimeEnabledFeatures::gpuCompositingEnabled()) |
| setTransferableResourceInMemory(resource, image); |
| else if (!image->isTextureBacked() && |
| RuntimeEnabledFeatures::gpuCompositingEnabled()) |
| setTransferableResourceMemoryToTexture(resource, image); |
| else |
| setTransferableResourceInTexture(resource, image); |
| |
| m_nextResourceId++; |
| frame.delegated_frame_data->resource_list.push_back(std::move(resource)); |
| |
| cc::TextureDrawQuad* quad = |
| pass->CreateAndAppendDrawQuad<cc::TextureDrawQuad>(); |
| gfx::Size rectSize(m_width, m_height); |
| |
| const bool needsBlending = true; |
| // TOOD(crbug.com/645993): this should be inherited from WebGL context's |
| // creation settings. |
| const bool premultipliedAlpha = true; |
| const gfx::PointF uvTopLeft(0.f, 0.f); |
| const gfx::PointF uvBottomRight(1.f, 1.f); |
| float vertexOpacity[4] = {1.f, 1.f, 1.f, 1.f}; |
| const bool yflipped = false; |
| // TODO(crbug.com/645994): this should be true when using style |
| // "image-rendering: pixelated". |
| const bool nearestNeighbor = false; |
| quad->SetAll(sqs, bounds, bounds, bounds, needsBlending, resource.id, |
| gfx::Size(), premultipliedAlpha, uvTopLeft, uvBottomRight, |
| SK_ColorTRANSPARENT, vertexOpacity, yflipped, nearestNeighbor, |
| false); |
| |
| frame.delegated_frame_data->render_pass_list.push_back(std::move(pass)); |
| |
| m_sink->SubmitCompositorFrame(std::move(frame), base::Closure()); |
| } |
| |
| void OffscreenCanvasFrameDispatcherImpl::ReturnResources( |
| Vector<cc::mojom::blink::ReturnedResourcePtr> resources) { |
| for (const auto& resource : resources) { |
| m_cachedImages.remove(resource->id); |
| m_sharedBitmaps.remove(resource->id); |
| m_cachedTextureIds.remove(resource->id); |
| } |
| } |
| |
| bool OffscreenCanvasFrameDispatcherImpl::verifyImageSize( |
| const sk_sp<SkImage>& image) { |
| if (image && image->width() == m_width && image->height() == m_height) |
| return true; |
| return false; |
| } |
| |
| } // namespace blink |