зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
3.4 KiB
C++
113 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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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#ifndef widget_windows_CompositorWidgetParent_h
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#define widget_windows_CompositorWidgetParent_h
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#include "CompositorWidget.h"
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#include "gfxASurface.h"
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#include "mozilla/gfx/CriticalSection.h"
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#include "mozilla/gfx/Point.h"
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#include "nsIWidget.h"
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class nsWindow;
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namespace mozilla {
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namespace widget {
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class CompositorWidgetDelegate
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{
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public:
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// Callbacks for nsWindow.
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virtual void EnterPresentLock() = 0;
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virtual void LeavePresentLock() = 0;
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virtual void OnDestroyWindow() = 0;
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// Transparency handling.
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virtual void UpdateTransparency(nsTransparencyMode aMode) = 0;
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virtual void ClearTransparentWindow() = 0;
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// If in-process and using software rendering, return the backing transparent
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// DC.
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virtual HDC GetTransparentDC() const = 0;
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};
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// This is the Windows-specific implementation of CompositorWidget. For
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// the most part it only requires an HWND, however it maintains extra state
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// for transparent windows, as well as for synchronizing WM_SETTEXT messages
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// with the compositor.
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class WinCompositorWidget
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: public CompositorWidget,
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public CompositorWidgetDelegate
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{
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public:
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WinCompositorWidget(const CompositorWidgetInitData& aInitData);
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bool PreRender(WidgetRenderingContext*) override;
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void PostRender(WidgetRenderingContext*) override;
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already_AddRefed<gfx::DrawTarget> StartRemoteDrawing() override;
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void EndRemoteDrawing() override;
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bool NeedsToDeferEndRemoteDrawing() override;
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LayoutDeviceIntSize GetClientSize() override;
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already_AddRefed<gfx::DrawTarget> GetBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
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const LayoutDeviceIntRect& aRect,
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const LayoutDeviceIntRect& aClearRect) override;
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already_AddRefed<gfx::SourceSurface> EndBackBufferDrawing() override;
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bool InitCompositor(layers::Compositor* aCompositor) override;
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uintptr_t GetWidgetKey() override;
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WinCompositorWidget* AsWindows() override {
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return this;
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}
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CompositorWidgetDelegate* AsDelegate() override {
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return this;
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}
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// CompositorWidgetDelegate overrides.
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void EnterPresentLock() override;
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void LeavePresentLock() override;
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void OnDestroyWindow() override;
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void UpdateTransparency(nsTransparencyMode aMode) override;
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void ClearTransparentWindow() override;
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bool RedrawTransparentWindow();
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// Ensure that a transparent surface exists, then return it.
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RefPtr<gfxASurface> EnsureTransparentSurface();
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HDC GetTransparentDC() const override {
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return mMemoryDC;
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}
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HWND GetHwnd() const {
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return mWnd;
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}
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private:
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HDC GetWindowSurface();
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void FreeWindowSurface(HDC dc);
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void CreateTransparentSurface(const gfx::IntSize& aSize);
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private:
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uintptr_t mWidgetKey;
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HWND mWnd;
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gfx::CriticalSection mPresentLock;
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// Transparency handling.
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nsTransparencyMode mTransparencyMode;
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RefPtr<gfxASurface> mTransparentSurface;
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HDC mMemoryDC;
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HDC mCompositeDC;
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// Locked back buffer of BasicCompositor
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uint8_t* mLockedBackBufferData;
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bool mNotDeferEndRemoteDrawing;
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};
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} // namespace widget
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} // namespace mozilla
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#endif // widget_windows_CompositorWidgetParent_h
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