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       1             : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2             : * This Source Code Form is subject to the terms of the Mozilla Public
       3             : * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef mozilla_gfx_layers_mlgpu_TexturedLayerMLGPU_h
       7             : #define mozilla_gfx_layers_mlgpu_TexturedLayerMLGPU_h
       8             : 
       9             : #include "LayerMLGPU.h"
      10             : #include "ImageLayers.h"
      11             : #include "mozilla/layers/ImageHost.h"
      12             : 
      13             : namespace mozilla {
      14             : namespace layers {
      15             : 
      16             : // This is the base class for canvas and image layers.
      17             : class TexturedLayerMLGPU : public LayerMLGPU
      18             : {
      19             : public:
      20           0 :   TexturedLayerMLGPU* AsTexturedLayerMLGPU() override { return this; }
      21             : 
      22             :   virtual gfx::SamplingFilter GetSamplingFilter() = 0;
      23             : 
      24             :   bool SetCompositableHost(CompositableHost* aHost) override;
      25             :   CompositableHost* GetCompositableHost() override;
      26             : 
      27             :   void AssignToView(FrameBuilder* aBuilder,
      28             :                     RenderViewMLGPU* aView,
      29             :                     Maybe<gfx::Polygon>&& aGeometry) override;
      30             : 
      31           0 :   TextureSource* GetTexture() const {
      32           0 :     return mTexture;
      33             :   }
      34           0 :   ImageHost* GetImageHost() const {
      35           0 :     return mHost;
      36             :   }
      37             : 
      38             :   // Return the scale factor from the texture source to the picture rect.
      39           0 :   virtual Maybe<gfx::Size> GetPictureScale() const {
      40           0 :     return Nothing();
      41             :   }
      42             : 
      43             :   // Mask layers aren't prepared like normal layers. They are bound as
      44             :   // mask operations are built. Mask layers are never tiled (they are
      45             :   // scaled to a lower resolution if too big), so this pathway returns
      46             :   // a TextureSource.
      47             :   RefPtr<TextureSource> BindAndGetTexture();
      48             : 
      49             : protected:
      50             :   explicit TexturedLayerMLGPU(LayerManagerMLGPU* aManager);
      51             :   virtual ~TexturedLayerMLGPU() override;
      52             : 
      53             :   void AssignBigImage(FrameBuilder* aBuilder,
      54             :                       RenderViewMLGPU* aView,
      55             :                       BigImageIterator* aIter,
      56             :                       const Maybe<gfx::Polygon>& aGeometry);
      57             : 
      58             :   bool OnPrepareToRender(FrameBuilder* aBuilder) override;
      59             : 
      60             : protected:
      61             :   RefPtr<ImageHost> mHost;
      62             :   RefPtr<TextureSource> mTexture;
      63             :   RefPtr<TextureSource> mBigImageTexture;
      64             :   gfx::IntRect mPictureRect;
      65             : };
      66             : 
      67             : // This is a pseudo layer that wraps a tile in an ImageLayer backed by a
      68             : // BigImage. Without this, we wouldn't have anything sensible to add to
      69             : // RenderPasses. In the future we could potentially consume the source
      70             : // layer more intelligently instead (for example, having it compute
      71             : // which textures are relevant for a given tile).
      72             : class TempImageLayerMLGPU final : public ImageLayer,
      73             :                                   public TexturedLayerMLGPU
      74             : {
      75             : public:
      76             :   explicit TempImageLayerMLGPU(LayerManagerMLGPU* aManager);
      77             : 
      78             :   // Layer
      79           0 :   HostLayer* AsHostLayer() override { return this; }
      80           0 :   gfx::SamplingFilter GetSamplingFilter() override {
      81           0 :     return mFilter;
      82             :   }
      83           0 :   bool IsContentOpaque() override {
      84           0 :     return mIsOpaque;
      85             :   }
      86             : 
      87             :   void Init(TexturedLayerMLGPU* aSource,
      88             :             const RefPtr<TextureSource>& aTexture,
      89             :             const gfx::IntRect& aPictureRect);
      90             : 
      91             :   // HostLayer
      92           0 :   Layer* GetLayer() override { return this; }
      93             : 
      94             : protected:
      95             :   ~TempImageLayerMLGPU() override;
      96             : 
      97             : private:
      98             :   gfx::SamplingFilter mFilter;
      99             :   bool mIsOpaque;
     100             : };
     101             : 
     102             : } // namespace layers
     103             : } // namespace mozilla
     104             : 
     105             : #endif // mozilla_gfx_layers_mlgpu_TexturedLayerMLGPU_h