gfx/layers/mlgpu/TexturedLayerMLGPU.cpp

   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 #include "TexturedLayerMLGPU.h"
   8 #include "LayerManagerMLGPU.h"
   9 #include "RenderViewMLGPU.h"
  10 #include "FrameBuilder.h"
  11 #include "mozilla/gfx/Types.h"
  12 #include "mozilla/layers/ImageHost.h"
  13 #include "UnitTransforms.h"
  14
  15 namespace mozilla {
  16 namespace layers {
  17
  18 using namespace gfx;
  19
  20 TexturedLayerMLGPU::TexturedLayerMLGPU(LayerManagerMLGPU* aManager)
  21     : LayerMLGPU(aManager) {}
  22
  23 TexturedLayerMLGPU::~TexturedLayerMLGPU() {
  24   // Note: we have to cleanup resources in derived classes, since we can't
  25   // easily tell in our destructor if we have a TempImageLayerMLGPU, which
  26   // should not have its compositable detached, and we can't call GetLayer
  27   // here.
  28 }
  29
  30 bool TexturedLayerMLGPU::SetCompositableHost(CompositableHost* aHost) {
  31   switch (aHost->GetType()) {
  32     case CompositableType::IMAGE:
  33       mHost = aHost->AsImageHost();
  34       return true;
  35     default:
  36       return false;
  37   }
  38 }
  39
  40 CompositableHost* TexturedLayerMLGPU::GetCompositableHost() {
  41   if (mHost && mHost->IsAttached()) {
  42     return mHost.get();
  43   }
  44   return nullptr;
  45 }
  46
  47 RefPtr<TextureSource> TexturedLayerMLGPU::BindAndGetTexture() {
  48   if (!mHost) {
  49     return nullptr;
  50   }
  51
  52   LayerManagerMLGPU* lm = GetLayerManager()->AsLayerManagerMLGPU();
  53
  54   // Note: we don't call FinishRendering since mask layers do not need
  55   // composite notifications or bias updates. (This function should
  56   // not be called for non-mask-layers).
  57   ImageHost::RenderInfo info;
  58   if (!mHost->PrepareToRender(lm->GetTextureSourceProvider(), &info)) {
  59     return nullptr;
  60   }
  61
  62   RefPtr<TextureSource> source = mHost->AcquireTextureSource(info);
  63   if (!source) {
  64     return nullptr;
  65   }
  66
  67   mTexture = source;
  68   return source;
  69 }
  70
  71 bool TexturedLayerMLGPU::OnPrepareToRender(FrameBuilder* aBuilder) {
  72   if (!mHost) {
  73     return false;
  74   }
  75
  76   LayerManagerMLGPU* lm = GetLayerManager()->AsLayerManagerMLGPU();
  77
  78   ImageHost::RenderInfo info;
  79   if (!mHost->PrepareToRender(lm->GetTextureSourceProvider(), &info)) {
  80     return false;
  81   }
  82
  83   RefPtr<TextureSource> source = mHost->AcquireTextureSource(info);
  84   if (!source) {
  85     return false;
  86   }
  87
  88   if (source->AsBigImageIterator()) {
  89     mBigImageTexture = source;
  90     mTexture = nullptr;
  91   } else {
  92     mTexture = source;
  93   }
  94
  95   mPictureRect = IntRect(0, 0, info.img->mPictureRect.Width(),
  96                          info.img->mPictureRect.Height());
  97
  98   mHost->FinishRendering(info);
  99   return true;
 100 }
 101
 102 void TexturedLayerMLGPU::AssignToView(FrameBuilder* aBuilder,
 103                                       RenderViewMLGPU* aView,
 104                                       Maybe<Polygon>&& aGeometry) {
 105   if (mBigImageTexture) {
 106     BigImageIterator* iter = mBigImageTexture->AsBigImageIterator();
 107     iter->BeginBigImageIteration();
 108     AssignBigImage(aBuilder, aView, iter, aGeometry);
 109     iter->EndBigImageIteration();
 110   } else {
 111     LayerMLGPU::AssignToView(aBuilder, aView, std::move(aGeometry));
 112   }
 113 }
 114
 115 void TexturedLayerMLGPU::AssignBigImage(FrameBuilder* aBuilder,
 116                                         RenderViewMLGPU* aView,
 117                                         BigImageIterator* aIter,
 118                                         const Maybe<Polygon>& aGeometry) {
 119   const Matrix4x4& transform = GetLayer()->GetEffectiveTransformForBuffer();
 120
 121   // Note that we don't need to assign these in any particular order, since
 122   // they do not overlap.
 123   do {
 124     IntRect tileRect = aIter->GetTileRect();
 125     IntRect rect = tileRect.Intersect(mPictureRect);
 126     if (rect.IsEmpty()) {
 127       continue;
 128     }
 129
 130     {
 131       Rect screenRect = transform.TransformBounds(Rect(rect));
 132       screenRect.MoveBy(-aView->GetTargetOffset());
 133       screenRect =
 134           screenRect.Intersect(Rect(mComputedClipRect.ToUnknownRect()));
 135       if (screenRect.IsEmpty()) {
 136         // This tile is not in the clip region, so skip it.
 137         continue;
 138       }
 139     }
 140
 141     RefPtr<TextureSource> tile = mBigImageTexture->ExtractCurrentTile();
 142     if (!tile) {
 143       continue;
 144     }
 145
 146     // Create a temporary item.
 147     RefPtr<TempImageLayerMLGPU> item =
 148         new TempImageLayerMLGPU(aBuilder->GetManager());
 149     item->Init(this, tile, rect);
 150
 151     Maybe<Polygon> geometry = aGeometry;
 152     item->AddBoundsToView(aBuilder, aView, std::move(geometry));
 153
 154     // Since the layer tree is not holding this alive, we have to ask the
 155     // FrameBuilder to do it for us.
 156     aBuilder->RetainTemporaryLayer(item);
 157   } while (aIter->NextTile());
 158 }
 159
 160 TempImageLayerMLGPU::TempImageLayerMLGPU(LayerManagerMLGPU* aManager)
 161     : ImageLayer(aManager, static_cast<HostLayer*>(this)),
 162       TexturedLayerMLGPU(aManager),
 163       mFilter(gfx::SamplingFilter::GOOD),
 164       mIsOpaque(false) {}
 165
 166 TempImageLayerMLGPU::~TempImageLayerMLGPU() = default;
 167
 168 void TempImageLayerMLGPU::Init(TexturedLayerMLGPU* aSource,
 169                                const RefPtr<TextureSource>& aTexture,
 170                                const gfx::IntRect& aPictureRect) {
 171   // ImageLayer properties.
 172   mEffectiveTransform = aSource->GetLayer()->GetEffectiveTransform();
 173   mEffectiveTransformForBuffer =
 174       aSource->GetLayer()->GetEffectiveTransformForBuffer();
 175
 176   // Base LayerMLGPU properties.
 177   mComputedClipRect = aSource->GetComputedClipRect();
 178   mMask = aSource->GetMask();
 179   mComputedOpacity = aSource->GetComputedOpacity();
 180
 181   // TexturedLayerMLGPU properties.
 182   mHost = aSource->GetImageHost();
 183   mTexture = aTexture;
 184   mPictureRect = aPictureRect;
 185
 186   // Local properties.
 187   mFilter = aSource->GetSamplingFilter();
 188   mShadowVisibleRegion = aSource->GetShadowVisibleRegion();
 189   mIsOpaque = aSource->IsContentOpaque();
 190
 191   // Set this layer to prepared so IsPrepared() assertions don't fire.
 192   MarkPrepared();
 193 }
 194
 195 }  // namespace layers
 196 }  // namespace mozilla