зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
2.6 KiB
C++
90 строки
2.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "CompositorWidget.h"
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#include "GLConsts.h"
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#include "nsBaseWidget.h"
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#include "VsyncDispatcher.h"
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namespace mozilla {
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namespace widget {
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CompositorWidget::CompositorWidget(const layers::CompositorOptions& aOptions)
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: mOptions(aOptions)
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{
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}
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CompositorWidget::~CompositorWidget()
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{
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}
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already_AddRefed<gfx::DrawTarget>
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CompositorWidget::StartRemoteDrawing()
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{
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return nullptr;
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}
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void
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CompositorWidget::CleanupRemoteDrawing()
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{
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mLastBackBuffer = nullptr;
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}
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already_AddRefed<gfx::DrawTarget>
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CompositorWidget::GetBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
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const LayoutDeviceIntRect& aRect,
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const LayoutDeviceIntRect& aClearRect)
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{
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MOZ_ASSERT(aScreenTarget);
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gfx::SurfaceFormat format =
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aScreenTarget->GetFormat() == gfx::SurfaceFormat::B8G8R8X8 ? gfx::SurfaceFormat::B8G8R8X8 : gfx::SurfaceFormat::B8G8R8A8;
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gfx::IntSize size = aRect.ToUnknownRect().Size();
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gfx::IntSize clientSize(GetClientSize().ToUnknownSize());
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RefPtr<gfx::DrawTarget> target;
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// Re-use back buffer if possible
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if (mLastBackBuffer &&
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mLastBackBuffer->GetBackendType() == aScreenTarget->GetBackendType() &&
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mLastBackBuffer->GetFormat() == format &&
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size <= mLastBackBuffer->GetSize() &&
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mLastBackBuffer->GetSize() <= clientSize) {
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target = mLastBackBuffer;
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target->SetTransform(gfx::Matrix());
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if (!aClearRect.IsEmpty()) {
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gfx::IntRect clearRect = aClearRect.ToUnknownRect() - aRect.ToUnknownRect().TopLeft();
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target->ClearRect(gfx::Rect(clearRect.X(), clearRect.Y(), clearRect.Width(), clearRect.Height()));
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}
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} else {
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target = aScreenTarget->CreateSimilarDrawTarget(size, format);
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mLastBackBuffer = target;
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}
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return target.forget();
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}
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already_AddRefed<gfx::SourceSurface>
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CompositorWidget::EndBackBufferDrawing()
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{
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RefPtr<gfx::SourceSurface> surface = mLastBackBuffer ? mLastBackBuffer->Snapshot() : nullptr;
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return surface.forget();
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}
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uint32_t
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CompositorWidget::GetGLFrameBufferFormat()
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{
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return LOCAL_GL_RGBA;
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}
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RefPtr<VsyncObserver>
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CompositorWidget::GetVsyncObserver() const
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{
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// This should only used when the widget is in the GPU process, and should be
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// implemented by IPDL-enabled CompositorWidgets.
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// GPU process does not have a CompositorVsyncDispatcher.
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MOZ_ASSERT_UNREACHABLE("Must be implemented by derived class");
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return nullptr;
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}
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} // namespace widget
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} // namespace mozilla
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