cc/resources/display_list_raster_source.cc

   1 // Copyright 2014 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/resources/display_list_raster_source.h"
   6
   7 #include "base/trace_event/trace_event.h"
   8 #include "cc/base/region.h"
   9 #include "cc/debug/debug_colors.h"
  10 #include "cc/resources/display_item_list.h"
  11 #include "cc/resources/raster_source_helper.h"
  12 #include "skia/ext/analysis_canvas.h"
  13 #include "third_party/skia/include/core/SkCanvas.h"
  14 #include "third_party/skia/include/core/SkPictureRecorder.h"
  15 #include "ui/gfx/geometry/rect_conversions.h"
  16
  17 namespace {
  18
  19 #ifdef NDEBUG
  20 const bool kDefaultClearCanvasSetting = false;
  21 #else
  22 const bool kDefaultClearCanvasSetting = true;
  23 #endif
  24
  25 }  // namespace
  26
  27 namespace cc {
  28
  29 scoped_refptr<DisplayListRasterSource>
  30 DisplayListRasterSource::CreateFromDisplayListRecordingSource(
  31     const DisplayListRecordingSource* other,
  32     bool can_use_lcd_text) {
  33   return make_scoped_refptr(
  34       new DisplayListRasterSource(other, can_use_lcd_text));
  35 }
  36
  37 DisplayListRasterSource::DisplayListRasterSource()
  38     : background_color_(SK_ColorTRANSPARENT),
  39       requires_clear_(true),
  40       can_use_lcd_text_(true),
  41       is_solid_color_(false),
  42       solid_color_(SK_ColorTRANSPARENT),
  43       clear_canvas_with_debug_color_(kDefaultClearCanvasSetting),
  44       slow_down_raster_scale_factor_for_debug_(0),
  45       should_attempt_to_use_distance_field_text_(false) {
  46 }
  47
  48 DisplayListRasterSource::DisplayListRasterSource(
  49     const DisplayListRecordingSource* other,
  50     bool can_use_lcd_text)
  51     : display_list_(other->display_list_),
  52       background_color_(other->background_color_),
  53       requires_clear_(other->requires_clear_),
  54       can_use_lcd_text_(can_use_lcd_text),
  55       is_solid_color_(other->is_solid_color_),
  56       solid_color_(other->solid_color_),
  57       recorded_viewport_(other->recorded_viewport_),
  58       size_(other->size_),
  59       clear_canvas_with_debug_color_(kDefaultClearCanvasSetting),
  60       slow_down_raster_scale_factor_for_debug_(
  61           other->slow_down_raster_scale_factor_for_debug_),
  62       should_attempt_to_use_distance_field_text_(false) {
  63 }
  64
  65 DisplayListRasterSource::DisplayListRasterSource(
  66     const DisplayListRasterSource* other,
  67     bool can_use_lcd_text)
  68     : display_list_(other->display_list_),
  69       background_color_(other->background_color_),
  70       requires_clear_(other->requires_clear_),
  71       can_use_lcd_text_(can_use_lcd_text),
  72       is_solid_color_(other->is_solid_color_),
  73       solid_color_(other->solid_color_),
  74       recorded_viewport_(other->recorded_viewport_),
  75       size_(other->size_),
  76       clear_canvas_with_debug_color_(kDefaultClearCanvasSetting),
  77       slow_down_raster_scale_factor_for_debug_(
  78           other->slow_down_raster_scale_factor_for_debug_),
  79       should_attempt_to_use_distance_field_text_(
  80           other->should_attempt_to_use_distance_field_text_) {
  81 }
  82
  83 DisplayListRasterSource::~DisplayListRasterSource() {
  84 }
  85
  86 void DisplayListRasterSource::PlaybackToSharedCanvas(
  87     SkCanvas* canvas,
  88     const gfx::Rect& canvas_rect,
  89     float contents_scale) const {
  90   RasterCommon(canvas, NULL, canvas_rect, contents_scale);
  91 }
  92
  93 void DisplayListRasterSource::RasterForAnalysis(skia::AnalysisCanvas* canvas,
  94                                                 const gfx::Rect& canvas_rect,
  95                                                 float contents_scale) const {
  96   RasterCommon(canvas, canvas, canvas_rect, contents_scale);
  97 }
  98
  99 void DisplayListRasterSource::PlaybackToCanvas(SkCanvas* canvas,
 100                                                const gfx::Rect& canvas_rect,
 101                                                float contents_scale) const {
 102   RasterSourceHelper::PrepareForPlaybackToCanvas(
 103       canvas, canvas_rect, gfx::Rect(size_), contents_scale, background_color_,
 104       clear_canvas_with_debug_color_, requires_clear_);
 105
 106   RasterCommon(canvas, NULL, canvas_rect, contents_scale);
 107 }
 108
 109 void DisplayListRasterSource::RasterCommon(SkCanvas* canvas,
 110                                            SkDrawPictureCallback* callback,
 111                                            const gfx::Rect& canvas_rect,
 112                                            float contents_scale) const {
 113   canvas->translate(-canvas_rect.x(), -canvas_rect.y());
 114   gfx::Rect content_rect =
 115       gfx::ToEnclosingRect(gfx::ScaleRect(gfx::Rect(size_), contents_scale));
 116   content_rect.Intersect(canvas_rect);
 117
 118   canvas->clipRect(gfx::RectToSkRect(content_rect), SkRegion::kIntersect_Op);
 119
 120   DCHECK(display_list_.get());
 121   display_list_->Raster(canvas, callback, contents_scale);
 122 }
 123
 124 skia::RefPtr<SkPicture> DisplayListRasterSource::GetFlattenedPicture() {
 125   TRACE_EVENT0("cc", "DisplayListRasterSource::GetFlattenedPicture");
 126
 127   gfx::Rect display_list_rect(size_);
 128   SkPictureRecorder recorder;
 129   SkCanvas* canvas = recorder.beginRecording(display_list_rect.width(),
 130                                              display_list_rect.height());
 131   if (!display_list_rect.IsEmpty())
 132     PlaybackToCanvas(canvas, display_list_rect, 1.0);
 133   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
 134
 135   return picture;
 136 }
 137
 138 size_t DisplayListRasterSource::GetPictureMemoryUsage() const {
 139   return display_list_->PictureMemoryUsage();
 140 }
 141
 142 void DisplayListRasterSource::PerformSolidColorAnalysis(
 143     const gfx::Rect& content_rect,
 144     float contents_scale,
 145     RasterSource::SolidColorAnalysis* analysis) const {
 146   DCHECK(analysis);
 147   TRACE_EVENT0("cc", "DisplayListRasterSource::PerformSolidColorAnalysis");
 148
 149   gfx::Rect layer_rect =
 150       gfx::ScaleToEnclosingRect(content_rect, 1.0f / contents_scale);
 151
 152   layer_rect.Intersect(gfx::Rect(size_));
 153   skia::AnalysisCanvas canvas(layer_rect.width(), layer_rect.height());
 154   RasterForAnalysis(&canvas, layer_rect, 1.0f);
 155   analysis->is_solid_color = canvas.GetColorIfSolid(&analysis->solid_color);
 156 }
 157
 158 void DisplayListRasterSource::GatherPixelRefs(
 159     const gfx::Rect& content_rect,
 160     float contents_scale,
 161     std::vector<SkPixelRef*>* pixel_refs) const {
 162   DCHECK_EQ(0u, pixel_refs->size());
 163
 164   gfx::Rect layer_rect =
 165       gfx::ScaleToEnclosingRect(content_rect, 1.0f / contents_scale);
 166
 167   PixelRefMap::Iterator iterator(layer_rect, display_list_.get());
 168   while (iterator) {
 169     pixel_refs->push_back(*iterator);
 170     ++iterator;
 171   }
 172 }
 173
 174 bool DisplayListRasterSource::CoversRect(const gfx::Rect& content_rect,
 175                                          float contents_scale) const {
 176   if (size_.IsEmpty())
 177     return false;
 178   gfx::Rect layer_rect =
 179       gfx::ScaleToEnclosingRect(content_rect, 1.f / contents_scale);
 180   layer_rect.Intersect(gfx::Rect(size_));
 181
 182   return recorded_viewport_.Contains(layer_rect);
 183 }
 184
 185 gfx::Size DisplayListRasterSource::GetSize() const {
 186   return size_;
 187 }
 188
 189 bool DisplayListRasterSource::IsSolidColor() const {
 190   return is_solid_color_;
 191 }
 192
 193 SkColor DisplayListRasterSource::GetSolidColor() const {
 194   DCHECK(IsSolidColor());
 195   return solid_color_;
 196 }
 197
 198 bool DisplayListRasterSource::HasRecordings() const {
 199   return !!display_list_.get();
 200 }
 201
 202 void DisplayListRasterSource::SetShouldAttemptToUseDistanceFieldText() {
 203   should_attempt_to_use_distance_field_text_ = true;
 204 }
 205
 206 bool DisplayListRasterSource::ShouldAttemptToUseDistanceFieldText() const {
 207   return should_attempt_to_use_distance_field_text_;
 208 }
 209
 210 void DisplayListRasterSource::AsValueInto(
 211     base::trace_event::TracedValue* array) const {
 212   if (display_list_.get())
 213     TracedValue::AppendIDRef(display_list_.get(), array);
 214 }
 215
 216 void DisplayListRasterSource::DidBeginTracing() {
 217   if (display_list_.get())
 218     display_list_->EmitTraceSnapshot();
 219 }
 220
 221 bool DisplayListRasterSource::CanUseLCDText() const {
 222   return can_use_lcd_text_;
 223 }
 224
 225 scoped_refptr<RasterSource> DisplayListRasterSource::CreateCloneWithoutLCDText()
 226     const {
 227   bool can_use_lcd_text = false;
 228   return scoped_refptr<RasterSource>(
 229       new DisplayListRasterSource(this, can_use_lcd_text));
 230 }
 231
 232 }  // namespace cc