import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/layers/client/SingleTiledContentClient.cpp

@@ -0,0 +1,263 @@
+/* -*- 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 "mozilla/layers/SingleTiledContentClient.h"
+
+#include "ClientTiledPaintedLayer.h"
+
+namespace mozilla {
+namespace layers {
+
+
+SingleTiledContentClient::SingleTiledContentClient(ClientTiledPaintedLayer& aPaintedLayer,
+                                                   ClientLayerManager* aManager)
+  : TiledContentClient(aManager, "Single")
+{
+  MOZ_COUNT_CTOR(SingleTiledContentClient);
+
+  mTiledBuffer = new ClientSingleTiledLayerBuffer(aPaintedLayer, *this, aManager);
+}
+
+void
+SingleTiledContentClient::ClearCachedResources()
+{
+  CompositableClient::ClearCachedResources();
+  mTiledBuffer->DiscardBuffers();
+}
+
+void
+SingleTiledContentClient::UpdatedBuffer(TiledBufferType aType)
+{
+  mForwarder->UseTiledLayerBuffer(this, mTiledBuffer->GetSurfaceDescriptorTiles());
+  mTiledBuffer->ClearPaintedRegion();
+}
+
+/* static */ bool
+SingleTiledContentClient::ClientSupportsLayerSize(const gfx::IntSize& aSize, ClientLayerManager* aManager)
+{
+  int32_t maxTextureSize = aManager->GetMaxTextureSize();
+  return aSize.width <= maxTextureSize && aSize.height <= maxTextureSize;
+}
+
+ClientSingleTiledLayerBuffer::ClientSingleTiledLayerBuffer(ClientTiledPaintedLayer& aPaintedLayer,
+                                                           CompositableClient& aCompositableClient,
+                                                           ClientLayerManager* aManager)
+  : ClientTiledLayerBuffer(aPaintedLayer, aCompositableClient)
+  , mWasLastPaintProgressive(false)
+  , mFormat(gfx::SurfaceFormat::UNKNOWN)
+{
+}
+
+void
+ClientSingleTiledLayerBuffer::ReleaseTiles()
+{
+  if (!mTile.IsPlaceholderTile()) {
+    mTile.DiscardBuffers();
+  }
+  mTile.SetTextureAllocator(nullptr);
+}
+
+void
+ClientSingleTiledLayerBuffer::DiscardBuffers()
+{
+  if (!mTile.IsPlaceholderTile()) {
+    mTile.DiscardFrontBuffer();
+    mTile.DiscardBackBuffer();
+  }
+}
+
+SurfaceDescriptorTiles
+ClientSingleTiledLayerBuffer::GetSurfaceDescriptorTiles()
+{
+  InfallibleTArray<TileDescriptor> tiles;
+
+  TileDescriptor tileDesc = mTile.GetTileDescriptor();
+  tiles.AppendElement(tileDesc);
+  mTile.mUpdateRect = gfx::IntRect();
+
+  return SurfaceDescriptorTiles(mValidRegion,
+                                tiles,
+                                mTilingOrigin,
+                                mSize,
+                                0, 0, 1, 1,
+                                1.0,
+                                mFrameResolution.xScale,
+                                mFrameResolution.yScale,
+                                mWasLastPaintProgressive);
+}
+
+already_AddRefed<TextureClient>
+ClientSingleTiledLayerBuffer::GetTextureClient()
+{
+  MOZ_ASSERT(mFormat != gfx::SurfaceFormat::UNKNOWN);
+  return mCompositableClient.CreateTextureClientForDrawing(
+    gfx::ImageFormatToSurfaceFormat(mFormat), mSize, BackendSelector::Content,
+    TextureFlags::DISALLOW_BIGIMAGE | TextureFlags::IMMEDIATE_UPLOAD);
+}
+
+void
+ClientSingleTiledLayerBuffer::PaintThebes(const nsIntRegion& aNewValidRegion,
+                                          const nsIntRegion& aPaintRegion,
+                                          const nsIntRegion& aDirtyRegion,
+                                          LayerManager::DrawPaintedLayerCallback aCallback,
+                                          void* aCallbackData,
+                                          bool aIsProgressive)
+{
+  mWasLastPaintProgressive = aIsProgressive;
+
+  // Compare layer valid region size to current backbuffer size, discard if not matching.
+  gfx::IntSize size = aNewValidRegion.GetBounds().Size();
+  gfx::IntPoint origin = aNewValidRegion.GetBounds().TopLeft();
+  nsIntRegion paintRegion = aPaintRegion;
+
+  RefPtr<TextureClient> discardedFrontBuffer = nullptr;
+  RefPtr<TextureClient> discardedFrontBufferOnWhite = nullptr;
+  nsIntRegion discardedValidRegion;
+
+  if (mSize != size ||
+      mTilingOrigin != origin) {
+    discardedFrontBuffer = mTile.mFrontBuffer;
+    discardedFrontBufferOnWhite = mTile.mFrontBufferOnWhite;
+    discardedValidRegion = mValidRegion;
+
+    TILING_LOG("TILING %p: Single-tile valid region changed. Discarding buffers.\n", &mPaintedLayer)
+;
+    ResetPaintedAndValidState();
+    mSize = size;
+    mTilingOrigin = origin;
+    paintRegion = aNewValidRegion;
+  }
+
+  SurfaceMode mode;
+  gfxContentType content = GetContentType(&mode);
+  mFormat = gfxPlatform::GetPlatform()->OptimalFormatForContent(content);
+
+  if (mTile.IsPlaceholderTile()) {
+    mTile.SetTextureAllocator(this);
+  }
+
+  // The dirty region relative to the top-left of the tile.
+  nsIntRegion tileDirtyRegion = paintRegion.MovedBy(-mTilingOrigin);
+
+  nsIntRegion extraPainted;
+  RefPtr<TextureClient> backBufferOnWhite;
+  RefPtr<TextureClient> backBuffer =
+    mTile.GetBackBuffer(mCompositableClient,
+                        tileDirtyRegion,
+                        content, mode,
+                        extraPainted,
+                        &backBufferOnWhite);
+
+  mTile.mUpdateRect = tileDirtyRegion.GetBounds().Union(extraPainted.GetBounds());
+
+  extraPainted.MoveBy(mTilingOrigin);
+  extraPainted.And(extraPainted, aNewValidRegion);
+  mPaintedRegion.OrWith(paintRegion);
+  mPaintedRegion.OrWith(extraPainted);
+
+  if (!backBuffer) {
+    return;
+  }
+
+  RefPtr<gfx::DrawTarget> dt = backBuffer->BorrowDrawTarget();
+  RefPtr<gfx::DrawTarget> dtOnWhite;
+  if (backBufferOnWhite) {
+    dtOnWhite = backBufferOnWhite->BorrowDrawTarget();
+  }
+
+  if (mode != SurfaceMode::SURFACE_OPAQUE) {
+    for (auto iter = tileDirtyRegion.RectIter(); !iter.Done(); iter.Next()) {
+      const gfx::IntRect& rect = iter.Get();
+      if (dtOnWhite) {
+        dt->FillRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height),
+                     gfx::ColorPattern(gfx::Color(0.0, 0.0, 0.0, 1.0)));
+        dtOnWhite->FillRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height),
+                            gfx::ColorPattern(gfx::Color(1.0, 1.0, 1.0, 1.0)));
+      } else {
+        dt->ClearRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height));
+      }
+    }
+  }
+
+  // If the old frontbuffer was discarded then attempt to copy what we
+  // can from it to the new backbuffer.
+  if (discardedFrontBuffer) {
+    nsIntRegion copyableRegion;
+    copyableRegion.And(aNewValidRegion, discardedValidRegion);
+    copyableRegion.SubOut(aDirtyRegion);
+
+    if (!copyableRegion.IsEmpty()) {
+      TextureClientAutoLock frontLock(discardedFrontBuffer,
+                                      OpenMode::OPEN_READ);
+      if (frontLock.Succeeded()) {
+        for (auto iter = copyableRegion.RectIter(); !iter.Done(); iter.Next()) {
+          const gfx::IntRect rect = iter.Get() - discardedValidRegion.GetBounds().TopLeft();
+          const gfx::IntPoint dest = iter.Get().TopLeft() - mTilingOrigin;
+          discardedFrontBuffer->CopyToTextureClient(backBuffer, &rect, &dest);
+        }
+      }
+
+      if (discardedFrontBufferOnWhite && backBufferOnWhite) {
+        TextureClientAutoLock frontOnWhiteLock(discardedFrontBufferOnWhite,
+                                               OpenMode::OPEN_READ);
+        if (frontOnWhiteLock.Succeeded()) {
+          for (auto iter = copyableRegion.RectIter(); !iter.Done(); iter.Next()) {
+            const gfx::IntRect rect = iter.Get() - discardedValidRegion.GetBounds().TopLeft();
+            const gfx::IntPoint dest = iter.Get().TopLeft() - mTilingOrigin;
+
+            discardedFrontBufferOnWhite->CopyToTextureClient(backBufferOnWhite,
+                                                             &rect, &dest);
+          }
+        }
+      }
+
+      TILING_LOG("TILING %p: Region copied from discarded frontbuffer %s\n", &mPaintedLayer, Stringify(copyableRegion).c_str());
+
+      // We don't need to repaint valid content that was just copied.
+      paintRegion.SubOut(copyableRegion);
+    }
+  }
+
+  if (dtOnWhite) {
+    dt = gfx::Factory::CreateDualDrawTarget(dt, dtOnWhite);
+    dtOnWhite = nullptr;
+  }
+
+  {
+    RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(dt);
+    if (!ctx) {
+      gfxDevCrash(gfx::LogReason::InvalidContext) << "SingleTiledContextClient context problem " << gfx::hexa(dt);
+      return;
+    }
+    ctx->SetMatrix(ctx->CurrentMatrix().Translate(-mTilingOrigin.x, -mTilingOrigin.y));
+
+    aCallback(&mPaintedLayer, ctx, paintRegion, paintRegion, DrawRegionClip::DRAW, nsIntRegion(), aCallbackData);
+  }
+
+  // Mark the area we just drew into the back buffer as invalid in the front buffer as they're
+  // now out of sync.
+  mTile.mInvalidFront.OrWith(tileDirtyRegion);
+
+  // The new buffer is now validated, remove the dirty region from it.
+  mTile.mInvalidBack.SubOut(tileDirtyRegion);
+
+  dt = nullptr;
+
+  mTile.Flip();
+  UnlockTile(mTile);
+
+  if (backBuffer->HasIntermediateBuffer()) {
+    // If our new buffer has an internal buffer, we don't want to keep another
+    // TextureClient around unnecessarily, so discard the back-buffer.
+    mTile.DiscardBackBuffer();
+  }
+
+  mValidRegion = aNewValidRegion;
+  mLastPaintSurfaceMode = mode;
+  mLastPaintContentType = content;
+}
+
+} // namespace layers
+} // namespace mozilla