RenderCompositorOGLSWGL.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_OGL_SWGL_H

#define MOZILLA_GFX_RENDERCOMPOSITOR_OGL_SWGL_H

#include "mozilla/layers/Compositor.h"

#include "mozilla/webrender/RenderCompositorLayersSWGL.h"

namespace mozilla {

namespace layers {

class TextureImageTextureSourceOGL;

namespace wr {

class RenderCompositorOGLSWGL : public RenderCompositorLayersSWGL {

 public:

  static UniquePtr<RenderCompositor> Create(

      const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError);

  RenderCompositorOGLSWGL(layers::Compositor* aCompositor,

                          const RefPtr<widget::CompositorWidget>& aWidget,

                          void* aContext);

  virtual ~RenderCompositorOGLSWGL();

  gl::GLContext* GetGLContext();

  bool MakeCurrent() override;

  bool BeginFrame() override;

  RenderedFrameId EndFrame(const nsTArray<DeviceIntRect>& aDirtyRects) override;

  void GetCompositorCapabilities(CompositorCapabilities* aCaps) override;

  // Returns true for requesting rendering during readback.

  // RenderCompositorOGLSWGL::MaybeReadback() requests rendering.

  // This value is not used by WebRender, since native compositor API is used

  // for sw-wr.

  bool UsePartialPresent() override { return true; }

  bool RequestFullRender() override;

  void Pause() override;

  bool Resume() override;

  bool IsPaused() override;

  LayoutDeviceIntSize GetBufferSize() override;

  layers::WebRenderCompositor CompositorType() const override {

    return layers::WebRenderCompositor::OPENGL;

  bool MaybeReadback(const gfx::IntSize& aReadbackSize,

                     const wr::ImageFormat& aReadbackFormat,

                     const Range<uint8_t>& aReadbackBuffer,

                     bool* aNeedsYFlip) override;

 private:

  void HandleExternalImage(RenderTextureHost* aExternalImage,

                           FrameSurface& aFrameSurface) override;

  UniquePtr<RenderCompositorLayersSWGL::Tile> DoCreateTile(

      Surface* aSurface) override;

  EGLSurface CreateEGLSurface();

  void DestroyEGLSurface();

  EGLSurface mEGLSurface = EGL_NO_SURFACE;

  bool mFullRender = false;

#ifdef MOZ_WIDGET_ANDROID

  // Whether we are in the process of handling a NEW_SURFACE error. On Android

  // this is used to allow the widget an opportunity to recover from the first

  // instance, before raising a WebRenderError on subsequent occurences.

  bool mHandlingNewSurfaceError = false;

#endif

  class TileOGL : public RenderCompositorLayersSWGL::Tile {

   public:

    TileOGL(RefPtr<layers::TextureImageTextureSourceOGL>&& aTexture,

            const gfx::IntSize& aSize);

    virtual ~TileOGL();

    bool Map(wr::DeviceIntRect aDirtyRect, wr::DeviceIntRect aValidRect,

             void** aData, int32_t* aStride) override;

    void Unmap(const gfx::IntRect& aDirtyRect) override;

    layers::DataTextureSource* GetTextureSource() override;

    bool IsValid() override { return true; }

   private:

    RefPtr<layers::TextureImageTextureSourceOGL> mTexture;

    RefPtr<gfx::DataSourceSurface> mSurface;

    RefPtr<gfx::DataSourceSurface> mSubSurface;

    GLuint mPBO = 0;

};

};

}  // namespace wr

}  // namespace mozilla

#endif