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-rw-r--r--gfx/layers/ShareableCanvasRenderer.cpp229
1 files changed, 229 insertions, 0 deletions
diff --git a/gfx/layers/ShareableCanvasRenderer.cpp b/gfx/layers/ShareableCanvasRenderer.cpp
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+++ b/gfx/layers/ShareableCanvasRenderer.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ShareableCanvasRenderer.h"
+
+#include "mozilla/dom/WebGLTypes.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/layers/TextureClientSharedSurface.h"
+#include "mozilla/layers/CompositableForwarder.h"
+#include "mozilla/layers/TextureForwarder.h"
+
+#include "ClientWebGLContext.h"
+#include "gfxUtils.h"
+#include "GLScreenBuffer.h"
+#include "nsICanvasRenderingContextInternal.h"
+#include "SharedSurfaceGL.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace layers {
+
+ShareableCanvasRenderer::ShareableCanvasRenderer() {
+ MOZ_COUNT_CTOR(ShareableCanvasRenderer);
+}
+
+ShareableCanvasRenderer::~ShareableCanvasRenderer() {
+ MOZ_COUNT_DTOR(ShareableCanvasRenderer);
+
+ mFrontBufferFromDesc = nullptr;
+ DisconnectClient();
+}
+
+void ShareableCanvasRenderer::Initialize(const CanvasRendererData& aData) {
+ CanvasRenderer::Initialize(aData);
+ mCanvasClient = nullptr;
+}
+
+void ShareableCanvasRenderer::ClearCachedResources() {
+ CanvasRenderer::ClearCachedResources();
+
+ if (mCanvasClient) {
+ mCanvasClient->Clear();
+ }
+}
+
+void ShareableCanvasRenderer::DisconnectClient() {
+ if (mCanvasClient) {
+ mCanvasClient->OnDetach();
+ mCanvasClient = nullptr;
+ }
+}
+
+RefPtr<layers::TextureClient> ShareableCanvasRenderer::GetFrontBufferFromDesc(
+ const layers::SurfaceDescriptor& desc, TextureFlags flags) {
+ if (mFrontBufferFromDesc && mFrontBufferDesc == desc)
+ return mFrontBufferFromDesc;
+ mFrontBufferFromDesc = nullptr;
+
+ // Test the validity of aAllocator
+ const auto& compositableForwarder = GetForwarder();
+ if (!compositableForwarder) {
+ return nullptr;
+ }
+ const auto& textureForwarder = compositableForwarder->GetTextureForwarder();
+
+ auto format = gfx::SurfaceFormat::R8G8B8X8;
+ if (!mData.mIsOpaque) {
+ format = gfx::SurfaceFormat::R8G8B8A8;
+
+ if (!mData.mIsAlphaPremult) {
+ flags |= TextureFlags::NON_PREMULTIPLIED;
+ }
+ }
+
+ mFrontBufferFromDesc = SharedSurfaceTextureData::CreateTextureClient(
+ desc, format, mData.mSize, flags, textureForwarder);
+ mFrontBufferDesc = desc;
+ return mFrontBufferFromDesc;
+}
+
+void ShareableCanvasRenderer::UpdateCompositableClient() {
+ if (!CreateCompositable()) {
+ return;
+ }
+
+ if (!IsDirty()) {
+ return;
+ }
+ ResetDirty();
+
+ const auto context = mData.GetContext();
+ if (!context) return;
+ const auto& provider = context->GetBufferProvider();
+ const auto& forwarder = GetForwarder();
+
+ // -
+
+ auto flags = TextureFlags::IMMUTABLE;
+ if (!YIsDown()) {
+ flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
+ }
+ if (IsOpaque()) {
+ flags |= TextureFlags::IS_OPAQUE;
+ }
+
+ // With remote texture push callback, a new pushed remote texture is notifiled
+ // from RemoteTextureMap to WebRenderImageHost.
+ if (mData.mRemoteTextureOwnerIdOfPushCallback) {
+ GetForwarder()->EnableRemoteTexturePushCallback(
+ mCanvasClient, *mData.mRemoteTextureOwnerIdOfPushCallback, mData.mSize,
+ flags);
+ EnsurePipeline();
+ return;
+ }
+
+ // -
+
+ const auto fnGetExistingTc =
+ [&](const Maybe<SurfaceDescriptor>& aDesc,
+ bool& aOutLostFrontTexture) -> RefPtr<TextureClient> {
+ if (aDesc) {
+ return GetFrontBufferFromDesc(*aDesc, flags);
+ }
+ if (provider) {
+ if (!provider->SetKnowsCompositor(forwarder, aOutLostFrontTexture)) {
+ gfxCriticalNote << "BufferProvider::SetForwarder failed";
+ return nullptr;
+ }
+ if (aOutLostFrontTexture) {
+ return nullptr;
+ }
+
+ return provider->GetTextureClient();
+ }
+ return nullptr;
+ };
+
+ // -
+
+ const auto fnMakeTcFromSnapshot = [&]() -> RefPtr<TextureClient> {
+ const auto& size = mData.mSize;
+
+ auto contentType = gfxContentType::COLOR;
+ if (!mData.mIsOpaque) {
+ contentType = gfxContentType::COLOR_ALPHA;
+ }
+ const auto surfaceFormat =
+ gfxPlatform::GetPlatform()->Optimal2DFormatForContent(contentType);
+
+ const auto tc =
+ mCanvasClient->CreateTextureClientForCanvas(surfaceFormat, size, flags);
+ if (!tc) {
+ return nullptr;
+ }
+
+ {
+ TextureClientAutoLock tcLock(tc, OpenMode::OPEN_WRITE_ONLY);
+ if (!tcLock.Succeeded()) {
+ return nullptr;
+ }
+
+ const RefPtr<DrawTarget> dt = tc->BorrowDrawTarget();
+
+ const bool requireAlphaPremult = false;
+ auto borrowed = BorrowSnapshot(requireAlphaPremult);
+ if (!borrowed) {
+ return nullptr;
+ }
+ dt->CopySurface(borrowed->mSurf, borrowed->mSurf->GetRect(), {0, 0});
+ }
+
+ return tc;
+ };
+
+ // -
+
+ {
+ FirePreTransactionCallback();
+
+ const auto desc = context->GetFrontBuffer(nullptr);
+ if (desc &&
+ desc->type() == SurfaceDescriptor::TSurfaceDescriptorRemoteTexture) {
+ const auto& forwarder = GetForwarder();
+ const auto& textureDesc = desc->get_SurfaceDescriptorRemoteTexture();
+ if (!mData.mIsAlphaPremult) {
+ flags |= TextureFlags::NON_PREMULTIPLIED;
+ }
+ EnsurePipeline();
+ forwarder->UseRemoteTexture(mCanvasClient, textureDesc.textureId(),
+ textureDesc.ownerId(), mData.mSize, flags);
+
+ FireDidTransactionCallback();
+ return;
+ }
+
+ EnsurePipeline();
+
+ // Let's see if we can get a no-copy TextureClient from the canvas.
+ bool lostFrontTexture = false;
+ auto tc = fnGetExistingTc(desc, lostFrontTexture);
+ if (lostFrontTexture) {
+ // Device reset could cause this.
+ return;
+ }
+ if (!tc) {
+ // Otherwise, snapshot the surface and copy into a TexClient.
+ tc = fnMakeTcFromSnapshot();
+ }
+ if (tc != mFrontBufferFromDesc) {
+ mFrontBufferFromDesc = nullptr;
+ }
+
+ if (!tc) {
+ NS_WARNING("Couldn't make TextureClient for CanvasRenderer.");
+ return;
+ }
+
+ mCanvasClient->UseTexture(tc);
+
+ FireDidTransactionCallback();
+ }
+}
+
+} // namespace layers
+} // namespace mozilla