1 files changed, 90 insertions, 0 deletions
diff --git a/gfx/webrender_bindings/RenderCompositorSWGL.h b/gfx/webrender_bindings/RenderCompositorSWGL.h
new file mode 100644
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+++ b/gfx/webrender_bindings/RenderCompositorSWGL.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 MOZILLA_GFX_RENDERCOMPOSITOR_SWGL_H
+#define MOZILLA_GFX_RENDERCOMPOSITOR_SWGL_H
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/webrender/RenderCompositor.h"
+
+namespace mozilla {
+
+namespace wr {
+
+class RenderCompositorSWGL : public RenderCompositor {
+ public:
+  static UniquePtr<RenderCompositor> Create(
+      const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError);
+
+  RenderCompositorSWGL(const RefPtr<widget::CompositorWidget>& aWidget,
+                       void* aContext);
+  virtual ~RenderCompositorSWGL();
+
+  void* swgl() const override { return mContext; }
+
+  bool MakeCurrent() override;
+
+  bool BeginFrame() override;
+  void CancelFrame() override;
+  RenderedFrameId EndFrame(const nsTArray<DeviceIntRect>& aDirtyRects) final;
+
+  void StartCompositing(wr::ColorF aClearColor,
+                        const wr::DeviceIntRect* aDirtyRects,
+                        size_t aNumDirtyRects,
+                        const wr::DeviceIntRect* aOpaqueRects,
+                        size_t aNumOpaqueRects) override;
+
+  bool UsePartialPresent() override { return true; }
+  bool RequestFullRender() override;
+
+  void Pause() override;
+  bool Resume() override;
+
+  layers::WebRenderBackend BackendType() const override {
+    return layers::WebRenderBackend::SOFTWARE;
+  }
+  layers::WebRenderCompositor CompositorType() const override {
+    return layers::WebRenderCompositor::SOFTWARE;
+  }
+
+  bool SurfaceOriginIsTopLeft() override { return true; }
+
+  LayoutDeviceIntSize GetBufferSize() override;
+
+  bool SupportsExternalBufferTextures() const override { return true; }
+
+  // Interface for wr::Compositor
+  void GetCompositorCapabilities(CompositorCapabilities* aCaps) override;
+
+ private:
+  void* mContext = nullptr;
+  RefPtr<gfx::DrawTarget> mDT;
+  LayoutDeviceIntRegion mDirtyRegion;
+  // Keep consistent buffer size between BeginFrame and EndFrame/CancelFrame
+  // calls to make sure we don't change buffer size during rendering.
+  Maybe<LayoutDeviceIntSize> mRenderWidgetSize;
+  RefPtr<gfx::DataSourceSurface> mSurface;
+  uint8_t* mMappedData = nullptr;
+  int32_t mMappedStride = 0;
+#ifdef MOZ_WAYLAND
+  // On Wayland we need to request full render if widget size is changed
+  // because SW rendering backend reallocates and clears target surface.
+  LayoutDeviceIntSize mLastRenderWidgetSize;
+  bool mRequestFullRender = false;
+#endif
+
+  void ClearMappedBuffer();
+
+  bool AllocateMappedBuffer(const wr::DeviceIntRect* aOpaqueRects,
+                            size_t aNumOpaqueRects);
+
+  void CommitMappedBuffer(bool aDirty = true);
+};
+
+}  // namespace wr
+}  // namespace mozilla
+
+#endif