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