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/* 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 "CompositorWidget.h"
#include "GLConsts.h"
#include "nsBaseWidget.h"
#include "VsyncDispatcher.h"
namespace mozilla {
namespace widget {
CompositorWidget::CompositorWidget(const layers::CompositorOptions& aOptions)
: mOptions(aOptions) {}
CompositorWidget::~CompositorWidget() = default;
already_AddRefed<gfx::DrawTarget> CompositorWidget::StartRemoteDrawing() {
return nullptr;
}
void CompositorWidget::CleanupRemoteDrawing() { mLastBackBuffer = nullptr; }
already_AddRefed<gfx::DrawTarget> CompositorWidget::GetBackBufferDrawTarget(
gfx::DrawTarget* aScreenTarget, const gfx::IntRect& aRect,
bool* aOutIsCleared) {
MOZ_ASSERT(aScreenTarget);
gfx::SurfaceFormat format =
aScreenTarget->GetFormat() == gfx::SurfaceFormat::B8G8R8X8
? gfx::SurfaceFormat::B8G8R8X8
: gfx::SurfaceFormat::B8G8R8A8;
gfx::IntSize size = aRect.Size();
gfx::IntSize clientSize = Max(size, GetClientSize().ToUnknownSize());
*aOutIsCleared = false;
// Re-use back buffer if possible
if (!mLastBackBuffer ||
mLastBackBuffer->GetBackendType() != aScreenTarget->GetBackendType() ||
mLastBackBuffer->GetFormat() != format ||
mLastBackBuffer->GetSize() != clientSize) {
mLastBackBuffer =
aScreenTarget->CreateSimilarDrawTarget(clientSize, format);
*aOutIsCleared = true;
}
return do_AddRef(mLastBackBuffer);
}
already_AddRefed<gfx::SourceSurface> CompositorWidget::EndBackBufferDrawing() {
RefPtr<gfx::SourceSurface> surface =
mLastBackBuffer ? mLastBackBuffer->Snapshot() : nullptr;
return surface.forget();
}
uint32_t CompositorWidget::GetGLFrameBufferFormat() { return LOCAL_GL_RGBA; }
RefPtr<VsyncObserver> CompositorWidget::GetVsyncObserver() const {
// This should only used when the widget is in the GPU process, and should be
// implemented by IPDL-enabled CompositorWidgets.
// GPU process does not have a CompositorVsyncDispatcher.
MOZ_ASSERT_UNREACHABLE("Must be implemented by derived class");
return nullptr;
}
LayoutDeviceIntRegion CompositorWidget::GetTransparentRegion() {
// By default, we check the transparency mode to determine if the widget is
// transparent, and if so, designate the entire widget drawing area as
// transparent. Widgets wanting more complex transparency region determination
// should override this method.
auto* widget = RealWidget();
if (!widget || widget->GetTransparencyMode() != eTransparencyOpaque ||
widget->WidgetPaintsBackground()) {
return LayoutDeviceIntRect(LayoutDeviceIntPoint(0, 0), GetClientSize());
}
return LayoutDeviceIntRegion();
}
} // namespace widget
} // namespace mozilla
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