cc/raster/tile_task_worker_pool.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/raster/tile_task_worker_pool.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/trace_event/trace_event.h"
  10 #include "cc/playback/raster_source.h"
  11 #include "skia/ext/refptr.h"
  12 #include "third_party/skia/include/core/SkCanvas.h"
  13 #include "third_party/skia/include/core/SkDrawFilter.h"
  14 #include "third_party/skia/include/core/SkSurface.h"
  15
  16 namespace cc {
  17 namespace {
  18
  19 class TaskSetFinishedTaskImpl : public TileTask {
  20  public:
  21   explicit TaskSetFinishedTaskImpl(
  22       base::SequencedTaskRunner* task_runner,
  23       const base::Closure& on_task_set_finished_callback)
  24       : task_runner_(task_runner),
  25         on_task_set_finished_callback_(on_task_set_finished_callback) {}
  26
  27   // Overridden from Task:
  28   void RunOnWorkerThread() override {
  29     TRACE_EVENT0("cc", "TaskSetFinishedTaskImpl::RunOnWorkerThread");
  30     TaskSetFinished();
  31   }
  32
  33   // Overridden from TileTask:
  34   void ScheduleOnOriginThread(TileTaskClient* client) override {}
  35   void CompleteOnOriginThread(TileTaskClient* client) override {}
  36
  37  protected:
  38   ~TaskSetFinishedTaskImpl() override {}
  39
  40   void TaskSetFinished() {
  41     task_runner_->PostTask(FROM_HERE, on_task_set_finished_callback_);
  42   }
  43
  44  private:
  45   scoped_refptr<base::SequencedTaskRunner> task_runner_;
  46   const base::Closure on_task_set_finished_callback_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(TaskSetFinishedTaskImpl);
  49 };
  50
  51 }  // namespace
  52
  53 // This allows a micro benchmark system to run tasks with highest priority,
  54 // since it should finish as quickly as possible.
  55 size_t TileTaskWorkerPool::kBenchmarkTaskPriority = 0u;
  56 // Task priorities that make sure task set finished tasks run before any
  57 // other remaining tasks. This is combined with the task set type to ensure
  58 // proper prioritization ordering between task set types.
  59 size_t TileTaskWorkerPool::kTaskSetFinishedTaskPriorityBase = 1u;
  60 // For correctness, |kTileTaskPriorityBase| must be greater than
  61 // |kTaskSetFinishedTaskPriorityBase + kNumberOfTaskSets|.
  62 size_t TileTaskWorkerPool::kTileTaskPriorityBase = 10u;
  63
  64 TileTaskWorkerPool::TileTaskWorkerPool() {
  65 }
  66
  67 TileTaskWorkerPool::~TileTaskWorkerPool() {
  68 }
  69
  70 // static
  71 scoped_refptr<TileTask> TileTaskWorkerPool::CreateTaskSetFinishedTask(
  72     base::SequencedTaskRunner* task_runner,
  73     const base::Closure& on_task_set_finished_callback) {
  74   return make_scoped_refptr(
  75       new TaskSetFinishedTaskImpl(task_runner, on_task_set_finished_callback));
  76 }
  77
  78 // static
  79 void TileTaskWorkerPool::ScheduleTasksOnOriginThread(TileTaskClient* client,
  80                                                      TaskGraph* graph) {
  81   TRACE_EVENT0("cc", "TileTaskWorkerPool::ScheduleTasksOnOriginThread");
  82
  83   for (TaskGraph::Node::Vector::iterator it = graph->nodes.begin();
  84        it != graph->nodes.end(); ++it) {
  85     TaskGraph::Node& node = *it;
  86     TileTask* task = static_cast<TileTask*>(node.task);
  87
  88     if (!task->HasBeenScheduled()) {
  89       task->WillSchedule();
  90       task->ScheduleOnOriginThread(client);
  91       task->DidSchedule();
  92     }
  93   }
  94 }
  95
  96 // static
  97 void TileTaskWorkerPool::InsertNodeForTask(TaskGraph* graph,
  98                                            TileTask* task,
  99                                            size_t priority,
 100                                            size_t dependencies) {
 101   DCHECK(std::find_if(graph->nodes.begin(), graph->nodes.end(),
 102                       TaskGraph::Node::TaskComparator(task)) ==
 103          graph->nodes.end());
 104   graph->nodes.push_back(TaskGraph::Node(task, priority, dependencies));
 105 }
 106
 107 // static
 108 void TileTaskWorkerPool::InsertNodesForRasterTask(
 109     TaskGraph* graph,
 110     RasterTask* raster_task,
 111     const ImageDecodeTask::Vector& decode_tasks,
 112     size_t priority) {
 113   size_t dependencies = 0u;
 114
 115   // Insert image decode tasks.
 116   for (ImageDecodeTask::Vector::const_iterator it = decode_tasks.begin();
 117        it != decode_tasks.end(); ++it) {
 118     ImageDecodeTask* decode_task = it->get();
 119
 120     // Skip if already decoded.
 121     if (decode_task->HasCompleted())
 122       continue;
 123
 124     dependencies++;
 125
 126     // Add decode task if it doesn't already exists in graph.
 127     TaskGraph::Node::Vector::iterator decode_it =
 128         std::find_if(graph->nodes.begin(), graph->nodes.end(),
 129                      TaskGraph::Node::TaskComparator(decode_task));
 130     if (decode_it == graph->nodes.end())
 131       InsertNodeForTask(graph, decode_task, priority, 0u);
 132
 133     graph->edges.push_back(TaskGraph::Edge(decode_task, raster_task));
 134   }
 135
 136   InsertNodeForTask(graph, raster_task, priority, dependencies);
 137 }
 138
 139 static bool IsSupportedPlaybackToMemoryFormat(ResourceFormat format) {
 140   switch (format) {
 141     case RGBA_4444:
 142     case RGBA_8888:
 143     case BGRA_8888:
 144       return true;
 145     case ALPHA_8:
 146     case LUMINANCE_8:
 147     case RGB_565:
 148     case ETC1:
 149     case RED_8:
 150       return false;
 151   }
 152   NOTREACHED();
 153   return false;
 154 }
 155
 156 class SkipImageFilter : public SkDrawFilter {
 157  public:
 158   bool filter(SkPaint* paint, Type type) override {
 159     if (type == kBitmap_Type)
 160       return false;
 161
 162     SkShader* shader = paint->getShader();
 163     if (!shader)
 164       return true;
 165     SkShader::BitmapType bitmap_type =
 166         shader->asABitmap(nullptr, nullptr, nullptr);
 167     // The kDefault_BitmapType is returned for images. Other bitmap types are
 168     // simply bitmap representations of colors such as gradients. So, we can
 169     // return true and draw for any case except kDefault_BitmapType.
 170     return bitmap_type != SkShader::kDefault_BitmapType;
 171   }
 172 };
 173
 174 // static
 175 void TileTaskWorkerPool::PlaybackToMemory(void* memory,
 176                                           ResourceFormat format,
 177                                           const gfx::Size& size,
 178                                           size_t stride,
 179                                           const RasterSource* raster_source,
 180                                           const gfx::Rect& canvas_bitmap_rect,
 181                                           const gfx::Rect& canvas_playback_rect,
 182                                           float scale,
 183                                           bool include_images) {
 184   TRACE_EVENT0("cc", "TileTaskWorkerPool::PlaybackToMemory");
 185
 186   DCHECK(IsSupportedPlaybackToMemoryFormat(format)) << format;
 187
 188   // Uses kPremul_SkAlphaType since the result is not known to be opaque.
 189   SkImageInfo info =
 190       SkImageInfo::MakeN32(size.width(), size.height(), kPremul_SkAlphaType);
 191   SkColorType buffer_color_type = ResourceFormatToSkColorType(format);
 192   bool needs_copy = buffer_color_type != info.colorType();
 193
 194   // Use unknown pixel geometry to disable LCD text.
 195   SkSurfaceProps surface_props(0, kUnknown_SkPixelGeometry);
 196   if (raster_source->CanUseLCDText()) {
 197     // LegacyFontHost will get LCD text and skia figures out what type to use.
 198     surface_props = SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType);
 199   }
 200
 201   if (!stride)
 202     stride = info.minRowBytes();
 203   DCHECK_GT(stride, 0u);
 204
 205   skia::RefPtr<SkDrawFilter> image_filter;
 206   if (!include_images)
 207     image_filter = skia::AdoptRef(new SkipImageFilter);
 208
 209   if (!needs_copy) {
 210     skia::RefPtr<SkSurface> surface = skia::AdoptRef(
 211         SkSurface::NewRasterDirect(info, memory, stride, &surface_props));
 212     skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
 213     canvas->setDrawFilter(image_filter.get());
 214     raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
 215                                     canvas_playback_rect, scale);
 216     return;
 217   }
 218
 219   skia::RefPtr<SkSurface> surface =
 220       skia::AdoptRef(SkSurface::NewRaster(info, &surface_props));
 221   skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
 222   canvas->setDrawFilter(image_filter.get());
 223   // TODO(reveman): Improve partial raster support by reducing the size of
 224   // playback rect passed to PlaybackToCanvas. crbug.com/519070
 225   raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
 226                                   canvas_bitmap_rect, scale);
 227
 228   {
 229     TRACE_EVENT0("cc", "TileTaskWorkerPool::PlaybackToMemory::ConvertPixels");
 230
 231     SkImageInfo dst_info =
 232         SkImageInfo::Make(info.width(), info.height(), buffer_color_type,
 233                           info.alphaType(), info.profileType());
 234     // TODO(kaanb): The GL pipeline assumes a 4-byte alignment for the
 235     // bitmap data. There will be no need to call SkAlign4 once crbug.com/293728
 236     // is fixed.
 237     const size_t dst_row_bytes = SkAlign4(dst_info.minRowBytes());
 238     DCHECK_EQ(0u, dst_row_bytes % 4);
 239     bool success = canvas->readPixels(dst_info, memory, dst_row_bytes, 0, 0);
 240     DCHECK_EQ(true, success);
 241   }
 242 }
 243
 244 }  // namespace cc