gfx/webrender_bindings/RenderCompositorSWGL.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_GFX_RENDERCOMPOSITOR_SWGL_H
   8 #define MOZILLA_GFX_RENDERCOMPOSITOR_SWGL_H
   9
  10 #include "mozilla/gfx/2D.h"
  11 #include "mozilla/webrender/RenderCompositor.h"
  12
  13 namespace mozilla {
  14
  15 namespace wr {
  16
  17 class RenderCompositorSWGL : public RenderCompositor {
  18  public:
  19   static UniquePtr<RenderCompositor> Create(
  20       const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError);
  21
  22   RenderCompositorSWGL(const RefPtr<widget::CompositorWidget>& aWidget,
  23                        void* aContext);
  24   virtual ~RenderCompositorSWGL();
  25
  26   void* swgl() const override { return mContext; }
  27
  28   bool MakeCurrent() override;
  29
  30   bool BeginFrame() override;
  31   void CancelFrame() override;
  32   RenderedFrameId EndFrame(const nsTArray<DeviceIntRect>& aDirtyRects) final;
  33
  34   void StartCompositing(wr::ColorF aClearColor,
  35                         const wr::DeviceIntRect* aDirtyRects,
  36                         size_t aNumDirtyRects,
  37                         const wr::DeviceIntRect* aOpaqueRects,
  38                         size_t aNumOpaqueRects) override;
  39
  40   bool UsePartialPresent() override { return true; }
  41   bool RequestFullRender() override;
  42
  43   void Pause() override;
  44   bool Resume() override;
  45
  46   layers::WebRenderBackend BackendType() const override {
  47     return layers::WebRenderBackend::SOFTWARE;
  48   }
  49   layers::WebRenderCompositor CompositorType() const override {
  50     return layers::WebRenderCompositor::SOFTWARE;
  51   }
  52
  53   bool SurfaceOriginIsTopLeft() override { return true; }
  54
  55   LayoutDeviceIntSize GetBufferSize() override;
  56
  57   bool SupportsExternalBufferTextures() const override { return true; }
  58
  59   // Interface for wr::Compositor
  60   void GetCompositorCapabilities(CompositorCapabilities* aCaps) override;
  61
  62  private:
  63   void* mContext = nullptr;
  64   RefPtr<gfx::DrawTarget> mDT;
  65   LayoutDeviceIntRegion mDirtyRegion;
  66   // Keep consistent buffer size between BeginFrame and EndFrame/CancelFrame
  67   // calls to make sure we don't change buffer size during rendering.
  68   Maybe<LayoutDeviceIntSize> mRenderWidgetSize;
  69   RefPtr<gfx::DataSourceSurface> mSurface;
  70   uint8_t* mMappedData = nullptr;
  71   int32_t mMappedStride = 0;
  72 #ifdef MOZ_WIDGET_GTK
  73   // On Wayland we need to request full render if widget size is changed
  74   // because SW rendering backend reallocates and clears target surface.
  75   LayoutDeviceIntSize mLastRenderWidgetSize;
  76   bool mRequestFullRender = false;
  77 #endif
  78
  79   void ClearMappedBuffer();
  80
  81   bool AllocateMappedBuffer(const wr::DeviceIntRect* aOpaqueRects,
  82                             size_t aNumOpaqueRects);
  83
  84   void CommitMappedBuffer(bool aDirty = true);
  85 };
  86
  87 }  // namespace wr
  88 }  // namespace mozilla
  89
  90 #endif