The Tor Browser: gfx/layers/composite/TiledContentHost.cpp@b8a032363ba2 (annotated)

gfx/layers/composite/TiledContentHost.cpp@b8a032363ba2 (annotated)

gfx/layers/composite/TiledContentHost.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 #include "TiledContentHost.h"
 #include "ThebesLayerComposite.h"       // for ThebesLayerComposite
 #include "mozilla/gfx/BaseSize.h"       // for BaseSize
 #include "mozilla/gfx/Matrix.h"         // for Matrix4x4
 #include "mozilla/layers/Compositor.h"  // for Compositor
 #include "mozilla/layers/Effects.h"     // for TexturedEffect, Effect, etc
 #include "mozilla/layers/TextureHostOGL.h"  // for TextureHostOGL
 #include "nsAString.h"
 #include "nsDebug.h"                    // for NS_WARNING
 #include "nsPoint.h"                    // for nsIntPoint
 #include "nsPrintfCString.h"            // for nsPrintfCString
 #include "nsRect.h"                     // for nsIntRect
 #include "nsSize.h"                     // for nsIntSize
 #include "mozilla/layers/TiledContentClient.h"
 class gfxReusableSurfaceWrapper;
 namespace mozilla {
 using namespace gfx;
 namespace layers {
 class Layer;
 TiledLayerBufferComposite::TiledLayerBufferComposite()
   : mFrameResolution(1.0)
   , mHasDoubleBufferedTiles(false)
   , mUninitialized(true)
 {}
 /* static */ void
 TiledLayerBufferComposite::RecycleCallback(TextureHost* textureHost, void* aClosure)
 {
   textureHost->CompositorRecycle();
 }
 TiledLayerBufferComposite::TiledLayerBufferComposite(ISurfaceAllocator* aAllocator,
                                                      const SurfaceDescriptorTiles& aDescriptor,
                                                      const nsIntRegion& aOldPaintedRegion)
 {
   mUninitialized = false;
   mHasDoubleBufferedTiles = false;
   mValidRegion = aDescriptor.validRegion();
   mPaintedRegion = aDescriptor.paintedRegion();
   mRetainedWidth = aDescriptor.retainedWidth();
   mRetainedHeight = aDescriptor.retainedHeight();
   mResolution = aDescriptor.resolution();
   mFrameResolution = CSSToParentLayerScale(aDescriptor.frameResolution());
   // Combine any valid content that wasn't already uploaded
   nsIntRegion oldPaintedRegion(aOldPaintedRegion);
   oldPaintedRegion.And(oldPaintedRegion, mValidRegion);
   mPaintedRegion.Or(mPaintedRegion, oldPaintedRegion);
   const InfallibleTArray<TileDescriptor>& tiles = aDescriptor.tiles();
   for(size_t i = 0; i < tiles.Length(); i++) {
     RefPtr<TextureHost> texture;
     const TileDescriptor& tileDesc = tiles[i];
     switch (tileDesc.type()) {
       case TileDescriptor::TTexturedTileDescriptor : {
         texture = TextureHost::AsTextureHost(tileDesc.get_TexturedTileDescriptor().textureParent());
 #if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
         if (!gfxPrefs::LayersUseSimpleTiles()) {
           texture->SetRecycleCallback(RecycleCallback, nullptr);
         }
 #endif
         const TileLock& ipcLock = tileDesc.get_TexturedTileDescriptor().sharedLock();
         nsRefPtr<gfxSharedReadLock> sharedLock;
         if (ipcLock.type() == TileLock::TShmemSection) {
           sharedLock = gfxShmSharedReadLock::Open(aAllocator, ipcLock.get_ShmemSection());
         } else {
           sharedLock = reinterpret_cast<gfxMemorySharedReadLock*>(ipcLock.get_uintptr_t());
           if (sharedLock) {
             // The corresponding AddRef is in TiledClient::GetTileDescriptor
             sharedLock->Release();
           }
         }
         mRetainedTiles.AppendElement(TileHost(sharedLock, texture));
         break;
       }
       default:
         NS_WARNING("Unrecognised tile descriptor type");
         // Fall through
       case TileDescriptor::TPlaceholderTileDescriptor :
         mRetainedTiles.AppendElement(GetPlaceholderTile());
         break;
     }
     if (texture && !texture->HasInternalBuffer()) {
       mHasDoubleBufferedTiles = true;
     }
   }
 }
 void
 TiledLayerBufferComposite::ReadUnlock()
 {
   if (!IsValid()) {
     return;
   }
   for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
     mRetainedTiles[i].ReadUnlock();
   }
 }
 void
 TiledLayerBufferComposite::ReleaseTextureHosts()
 {
   if (!IsValid()) {
     return;
   }
   for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
     mRetainedTiles[i].mTextureHost = nullptr;
   }
 }
 void
 TiledLayerBufferComposite::Upload()
 {
   if(!IsValid()) {
     return;
   }
   // The TextureClients were created with the TEXTURE_IMMEDIATE_UPLOAD flag,
   // so calling Update on all the texture hosts will perform the texture upload.
   Update(mValidRegion, mPaintedRegion);
   ClearPaintedRegion();
 }
 TileHost
 TiledLayerBufferComposite::ValidateTile(TileHost aTile,
                                         const nsIntPoint& aTileOrigin,
                                         const nsIntRegion& aDirtyRect)
 {
   if (aTile.IsPlaceholderTile()) {
     NS_WARNING("Placeholder tile encountered in painted region");
     return aTile;
   }
 #ifdef GFX_TILEDLAYER_PREF_WARNINGS
   printf_stderr("Upload tile %i, %i\n", aTileOrigin.x, aTileOrigin.y);
   long start = PR_IntervalNow();
 #endif
   MOZ_ASSERT(aTile.mTextureHost->GetFlags() & TEXTURE_IMMEDIATE_UPLOAD);
   // We possibly upload the entire texture contents here. This is a purposeful
   // decision, as sub-image upload can often be slow and/or unreliable, but
   // we may want to reevaluate this in the future.
   // For !HasInternalBuffer() textures, this is likely a no-op.
   aTile.mTextureHost->Updated(nullptr);
 #ifdef GFX_TILEDLAYER_PREF_WARNINGS
   if (PR_IntervalNow() - start > 1) {
     printf_stderr("Tile Time to upload %i\n", PR_IntervalNow() - start);
   }
 #endif
   return aTile;
 }
 void
 TiledLayerBufferComposite::SetCompositor(Compositor* aCompositor)
 {
   if (!IsValid()) {
     return;
   }
   for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
     if (mRetainedTiles[i].IsPlaceholderTile()) continue;
     mRetainedTiles[i].mTextureHost->SetCompositor(aCompositor);
   }
 }
 #if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
 void
 TiledLayerBufferComposite::SetReleaseFence(const android::sp<android::Fence>& aReleaseFence)
 {
   for (size_t i = 0; i < mRetainedTiles.Length(); i++) {
     if (!mRetainedTiles[i].mTextureHost) {
       continue;
     }
     TextureHostOGL* texture = mRetainedTiles[i].mTextureHost->AsHostOGL();
     if (!texture) {
       continue;
     }
     texture->SetReleaseFence(new android::Fence(aReleaseFence->dup()));
   }
 }
 #endif
 TiledContentHost::TiledContentHost(const TextureInfo& aTextureInfo)
   : ContentHost(aTextureInfo)
   , mTiledBuffer(TiledLayerBufferComposite())
   , mLowPrecisionTiledBuffer(TiledLayerBufferComposite())
   , mOldTiledBuffer(TiledLayerBufferComposite())
   , mOldLowPrecisionTiledBuffer(TiledLayerBufferComposite())
   , mPendingUpload(false)
   , mPendingLowPrecisionUpload(false)
 {
   MOZ_COUNT_CTOR(TiledContentHost);
 }
 TiledContentHost::~TiledContentHost()
 {
   MOZ_COUNT_DTOR(TiledContentHost);
   // Unlock any buffers that may still be locked. If we have a pending upload,
   // we will need to unlock the buffer that was about to be uploaded.
   // If a buffer that was being composited had double-buffered tiles, we will
   // need to unlock that buffer too.
   if (mPendingUpload) {
     mTiledBuffer.ReadUnlock();
     if (mOldTiledBuffer.HasDoubleBufferedTiles()) {
       mOldTiledBuffer.ReadUnlock();
     }
   } else if (mTiledBuffer.HasDoubleBufferedTiles()) {
     mTiledBuffer.ReadUnlock();
   }
   if (mPendingLowPrecisionUpload) {
     mLowPrecisionTiledBuffer.ReadUnlock();
     if (mOldLowPrecisionTiledBuffer.HasDoubleBufferedTiles()) {
       mOldLowPrecisionTiledBuffer.ReadUnlock();
     }
   } else if (mLowPrecisionTiledBuffer.HasDoubleBufferedTiles()) {
     mLowPrecisionTiledBuffer.ReadUnlock();
   }
 }
 void
 TiledContentHost::Attach(Layer* aLayer,
                          Compositor* aCompositor,
                          AttachFlags aFlags /* = NO_FLAGS */)
 {
   CompositableHost::Attach(aLayer, aCompositor, aFlags);
   static_cast<ThebesLayerComposite*>(aLayer)->EnsureTiled();
 }
 void
 TiledContentHost::UseTiledLayerBuffer(ISurfaceAllocator* aAllocator,
                                       const SurfaceDescriptorTiles& aTiledDescriptor)
 {
   if (aTiledDescriptor.resolution() < 1) {
     if (mPendingLowPrecisionUpload) {
       mLowPrecisionTiledBuffer.ReadUnlock();
     } else {
       mPendingLowPrecisionUpload = true;
       // If the old buffer has double-buffered tiles, hang onto it so we can
       // unlock it after we've composited the new buffer.
       // We only need to hang onto the locks, but not the textures.
       // Releasing the textures here can help prevent a memory spike in the
       // situation that the client starts rendering new content before we get
       // to composite the new buffer.
       if (mLowPrecisionTiledBuffer.HasDoubleBufferedTiles()) {
         mOldLowPrecisionTiledBuffer = mLowPrecisionTiledBuffer;
         mOldLowPrecisionTiledBuffer.ReleaseTextureHosts();
       }
     }
     mLowPrecisionTiledBuffer =
       TiledLayerBufferComposite(aAllocator, aTiledDescriptor,
                                 mLowPrecisionTiledBuffer.GetPaintedRegion());
   } else {
     if (mPendingUpload) {
       mTiledBuffer.ReadUnlock();
     } else {
       mPendingUpload = true;
       if (mTiledBuffer.HasDoubleBufferedTiles()) {
         mOldTiledBuffer = mTiledBuffer;
         mOldTiledBuffer.ReleaseTextureHosts();
       }
     }
     mTiledBuffer = TiledLayerBufferComposite(aAllocator, aTiledDescriptor,
                                              mTiledBuffer.GetPaintedRegion());
   }
 }
 void
 TiledContentHost::Composite(EffectChain& aEffectChain,
                             float aOpacity,
                             const gfx::Matrix4x4& aTransform,
                             const gfx::Filter& aFilter,
                             const gfx::Rect& aClipRect,
                             const nsIntRegion* aVisibleRegion /* = nullptr */,
                             TiledLayerProperties* aLayerProperties /* = nullptr */)
 {
   MOZ_ASSERT(aLayerProperties, "aLayerProperties required for TiledContentHost");
   if (mPendingUpload) {
     mTiledBuffer.SetCompositor(mCompositor);
     mTiledBuffer.Upload();
     // For a single-buffered tiled buffer, Upload will upload the shared memory
     // surface to texture memory and we no longer need to read from them.
     if (!mTiledBuffer.HasDoubleBufferedTiles()) {
       mTiledBuffer.ReadUnlock();
     }
   }
   if (mPendingLowPrecisionUpload) {
     mLowPrecisionTiledBuffer.SetCompositor(mCompositor);
     mLowPrecisionTiledBuffer.Upload();
     if (!mLowPrecisionTiledBuffer.HasDoubleBufferedTiles()) {
       mLowPrecisionTiledBuffer.ReadUnlock();
     }
   }
   RenderLayerBuffer(mLowPrecisionTiledBuffer, aEffectChain, aOpacity, aFilter,
                     aClipRect, aLayerProperties->mVisibleRegion, aTransform);
   RenderLayerBuffer(mTiledBuffer, aEffectChain, aOpacity, aFilter,
                     aClipRect, aLayerProperties->mVisibleRegion, aTransform);
   // Now release the old buffer if it had double-buffered tiles, as we can
   // guarantee that they're no longer on the screen (and so any locks that may
   // have been held have been released).
   if (mPendingUpload && mOldTiledBuffer.HasDoubleBufferedTiles()) {
     mOldTiledBuffer.ReadUnlock();
     mOldTiledBuffer = TiledLayerBufferComposite();
   }
   if (mPendingLowPrecisionUpload && mOldLowPrecisionTiledBuffer.HasDoubleBufferedTiles()) {
     mOldLowPrecisionTiledBuffer.ReadUnlock();
     mOldLowPrecisionTiledBuffer = TiledLayerBufferComposite();
   }
   mPendingUpload = mPendingLowPrecisionUpload = false;
 }
 void
 TiledContentHost::RenderTile(const TileHost& aTile,
                              EffectChain& aEffectChain,
                              float aOpacity,
                              const gfx::Matrix4x4& aTransform,
                              const gfx::Filter& aFilter,
                              const gfx::Rect& aClipRect,
                              const nsIntRegion& aScreenRegion,
                              const nsIntPoint& aTextureOffset,
                              const nsIntSize& aTextureBounds)
 {
   if (aTile.IsPlaceholderTile()) {
     // This shouldn't ever happen, but let's fail semi-gracefully. No need
     // to warn, the texture update would have already caught this.
     return;
   }
   nsIntRect screenBounds = aScreenRegion.GetBounds();
   Rect quad(screenBounds.x, screenBounds.y, screenBounds.width, screenBounds.height);
   quad = aTransform.TransformBounds(quad);
   if (!quad.Intersects(mCompositor->ClipRectInLayersCoordinates(aClipRect))) {
     return;
   }
   AutoLockTextureHost autoLock(aTile.mTextureHost);
   if (autoLock.Failed()) {
     NS_WARNING("Failed to lock tile");
     return;
   }
   RefPtr<NewTextureSource> source = aTile.mTextureHost->GetTextureSources();
   if (!source) {
     return;
   }
   RefPtr<TexturedEffect> effect =
     CreateTexturedEffect(aTile.mTextureHost->GetFormat(), source, aFilter);
   if (!effect) {
     return;
   }
   aEffectChain.mPrimaryEffect = effect;
   nsIntRegionRectIterator it(aScreenRegion);
   for (const nsIntRect* rect = it.Next(); rect != nullptr; rect = it.Next()) {
     Rect graphicsRect(rect->x, rect->y, rect->width, rect->height);
     Rect textureRect(rect->x - aTextureOffset.x, rect->y - aTextureOffset.y,
                      rect->width, rect->height);
     effect->mTextureCoords = Rect(textureRect.x / aTextureBounds.width,
                                   textureRect.y / aTextureBounds.height,
                                   textureRect.width / aTextureBounds.width,
                                   textureRect.height / aTextureBounds.height);
     mCompositor->DrawQuad(graphicsRect, aClipRect, aEffectChain, aOpacity, aTransform);
   }
   mCompositor->DrawDiagnostics(DIAGNOSTIC_CONTENT|DIAGNOSTIC_TILE,
                                aScreenRegion, aClipRect, aTransform, mFlashCounter);
 }
 void
 TiledContentHost::RenderLayerBuffer(TiledLayerBufferComposite& aLayerBuffer,
                                     EffectChain& aEffectChain,
                                     float aOpacity,
                                     const gfx::Filter& aFilter,
                                     const gfx::Rect& aClipRect,
                                     nsIntRegion aVisibleRegion,
                                     gfx::Matrix4x4 aTransform)
 {
   if (!mCompositor) {
     NS_WARNING("Can't render tiled content host - no compositor");
     return;
   }
   float resolution = aLayerBuffer.GetResolution();
   gfx::Size layerScale(1, 1);
   // We assume that the current frame resolution is the one used in our high
   // precision layer buffer. Compensate for a changing frame resolution when
   // rendering the low precision buffer.
   if (aLayerBuffer.GetFrameResolution() != mTiledBuffer.GetFrameResolution()) {
     const CSSToParentLayerScale& layerResolution = aLayerBuffer.GetFrameResolution();
     const CSSToParentLayerScale& localResolution = mTiledBuffer.GetFrameResolution();
     layerScale.width = layerScale.height = layerResolution.scale / localResolution.scale;
     aVisibleRegion.ScaleRoundOut(layerScale.width, layerScale.height);
   }
   // If we're drawing the low precision buffer, make sure the high precision
   // buffer is masked out to avoid overdraw and rendering artifacts with
   // non-opaque layers.
   nsIntRegion maskRegion;
   if (resolution != mTiledBuffer.GetResolution()) {
     maskRegion = mTiledBuffer.GetValidRegion();
     // XXX This should be ScaleRoundIn, but there is no such function on
     //     nsIntRegion.
     maskRegion.ScaleRoundOut(layerScale.width, layerScale.height);
   }
   // Make sure the resolution and difference in frame resolution are accounted
   // for in the layer transform.
   aTransform.Scale(1/(resolution * layerScale.width),
 /(resolution * layerScale.height), 1);
   uint32_t rowCount = 0;
   uint32_t tileX = 0;
   nsIntRect visibleRect = aVisibleRegion.GetBounds();
   gfx::IntSize scaledTileSize = aLayerBuffer.GetScaledTileSize();
   for (int32_t x = visibleRect.x; x < visibleRect.x + visibleRect.width;) {
     rowCount++;
     int32_t tileStartX = aLayerBuffer.GetTileStart(x, scaledTileSize.width);
     int32_t w = scaledTileSize.width - tileStartX;
     if (x + w > visibleRect.x + visibleRect.width) {
       w = visibleRect.x + visibleRect.width - x;
     }
     int tileY = 0;
     for (int32_t y = visibleRect.y; y < visibleRect.y + visibleRect.height;) {
       int32_t tileStartY = aLayerBuffer.GetTileStart(y, scaledTileSize.height);
       int32_t h = scaledTileSize.height - tileStartY;
       if (y + h > visibleRect.y + visibleRect.height) {
         h = visibleRect.y + visibleRect.height - y;
       }
       TileHost tileTexture = aLayerBuffer.
         GetTile(nsIntPoint(aLayerBuffer.RoundDownToTileEdge(x, scaledTileSize.width),
                            aLayerBuffer.RoundDownToTileEdge(y, scaledTileSize.height)));
       if (tileTexture != aLayerBuffer.GetPlaceholderTile()) {
         nsIntRegion tileDrawRegion;
         tileDrawRegion.And(nsIntRect(x, y, w, h), aLayerBuffer.GetValidRegion());
         tileDrawRegion.And(tileDrawRegion, aVisibleRegion);
         tileDrawRegion.Sub(tileDrawRegion, maskRegion);
         if (!tileDrawRegion.IsEmpty()) {
           tileDrawRegion.ScaleRoundOut(resolution, resolution);
           nsIntPoint tileOffset((x - tileStartX) * resolution,
                                 (y - tileStartY) * resolution);
           gfx::IntSize tileSize = aLayerBuffer.GetTileSize();
           RenderTile(tileTexture, aEffectChain, aOpacity, aTransform, aFilter, aClipRect, tileDrawRegion,
                      tileOffset, nsIntSize(tileSize.width, tileSize.height));
         }
       }
       tileY++;
       y += h;
     }
     tileX++;
     x += w;
   }
   gfx::Rect rect(visibleRect.x, visibleRect.y,
                  visibleRect.width, visibleRect.height);
   GetCompositor()->DrawDiagnostics(DIAGNOSTIC_CONTENT,
                                    rect, aClipRect, aTransform, mFlashCounter);
 }
 void
 TiledContentHost::PrintInfo(nsACString& aTo, const char* aPrefix)
 {
   aTo += aPrefix;
   aTo += nsPrintfCString("TiledContentHost (0x%p)", this);
 }
 #ifdef MOZ_DUMP_PAINTING
 void
 TiledContentHost::Dump(FILE* aFile,
                        const char* aPrefix,
                        bool aDumpHtml)
 {
   if (!aFile) {
     aFile = stderr;
   }
   TiledLayerBufferComposite::Iterator it = mTiledBuffer.TilesBegin();
   TiledLayerBufferComposite::Iterator stop = mTiledBuffer.TilesEnd();
   if (aDumpHtml) {
     fprintf_stderr(aFile, "<ul>");
   }
   for (;it != stop; ++it) {
     fprintf_stderr(aFile, "%s", aPrefix);
     fprintf_stderr(aFile, aDumpHtml ? "<li> <a href=" : "Tile ");
     if (it->IsPlaceholderTile()) {
       fprintf_stderr(aFile, "empty tile");
     } else {
       DumpTextureHost(aFile, it->mTextureHost);
     }
     fprintf_stderr(aFile, aDumpHtml ? " >Tile</a></li>" : " ");
   }
     if (aDumpHtml) {
     fprintf_stderr(aFile, "</ul>");
   }
 }
 #endif
 } // namespace
 } // namespace

The Tor Browser / annotate

gfx/layers/composite/TiledContentHost.cpp@b8a032363ba2 (annotated)

gfx/layers/composite/TiledContentHost.cpp