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