Update from https://crrev.com/306655

cc/resources/display_list_raster_source.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/resources/display_list_raster_source.h"
+
+#include "base/debug/trace_event.h"
+#include "cc/base/region.h"
+#include "cc/debug/debug_colors.h"
+#include "cc/resources/display_item_list.h"
+#include "cc/resources/raster_source_helper.h"
+#include "skia/ext/analysis_canvas.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPictureRecorder.h"
+#include "ui/gfx/geometry/rect_conversions.h"
+
+namespace {
+
+#ifdef NDEBUG
+const bool kDefaultClearCanvasSetting = false;
+#else
+const bool kDefaultClearCanvasSetting = true;
+#endif
+
+}  // namespace
+
+namespace cc {
+
+scoped_refptr<DisplayListRasterSource> DisplayListRasterSource::Create() {
+  return make_scoped_refptr(new DisplayListRasterSource);
+}
+
+scoped_refptr<DisplayListRasterSource>
+DisplayListRasterSource::CreateFromDisplayListRecordingSource(
+    const DisplayListRecordingSource* other) {
+  return make_scoped_refptr(new DisplayListRasterSource(other));
+}
+
+DisplayListRasterSource::DisplayListRasterSource()
+    : background_color_(SK_ColorTRANSPARENT),
+      requires_clear_(true),
+      can_use_lcd_text_(true),
+      is_solid_color_(false),
+      solid_color_(SK_ColorTRANSPARENT),
+      clear_canvas_with_debug_color_(kDefaultClearCanvasSetting),
+      slow_down_raster_scale_factor_for_debug_(0),
+      should_attempt_to_use_distance_field_text_(false) {
+}
+
+DisplayListRasterSource::DisplayListRasterSource(
+    const DisplayListRecordingSource* other)
+    : display_list_(other->display_list_),
+      background_color_(SK_ColorTRANSPARENT),
+      requires_clear_(true),
+      can_use_lcd_text_(other->can_use_lcd_text_),
+      is_solid_color_(other->is_solid_color_),
+      solid_color_(other->solid_color_),
+      recorded_viewport_(other->recorded_viewport_),
+      size_(other->size_),
+      clear_canvas_with_debug_color_(kDefaultClearCanvasSetting),
+      slow_down_raster_scale_factor_for_debug_(
+          other->slow_down_raster_scale_factor_for_debug_),
+      should_attempt_to_use_distance_field_text_(false) {
+}
+
+DisplayListRasterSource::~DisplayListRasterSource() {
+}
+
+void DisplayListRasterSource::PlaybackToSharedCanvas(
+    SkCanvas* canvas,
+    const gfx::Rect& canvas_rect,
+    float contents_scale) const {
+  RasterCommon(canvas, NULL, canvas_rect, contents_scale, false);
+}
+
+void DisplayListRasterSource::RasterForAnalysis(skia::AnalysisCanvas* canvas,
+                                                const gfx::Rect& canvas_rect,
+                                                float contents_scale) const {
+  RasterCommon(canvas, canvas, canvas_rect, contents_scale, true);
+}
+
+void DisplayListRasterSource::PlaybackToCanvas(SkCanvas* canvas,
+                                               const gfx::Rect& canvas_rect,
+                                               float contents_scale) const {
+  RasterSourceHelper::PrepareForPlaybackToCanvas(
+      canvas, canvas_rect, gfx::Rect(size_), contents_scale, background_color_,
+      clear_canvas_with_debug_color_, requires_clear_);
+
+  RasterCommon(canvas, NULL, canvas_rect, contents_scale, false);
+}
+
+void DisplayListRasterSource::RasterCommon(SkCanvas* canvas,
+                                           SkDrawPictureCallback* callback,
+                                           const gfx::Rect& canvas_rect,
+                                           float contents_scale,
+                                           bool is_analysis) const {
+  canvas->translate(-canvas_rect.x(), -canvas_rect.y());
+  gfx::Rect content_rect =
+      gfx::ToEnclosingRect(gfx::ScaleRect(gfx::Rect(size_), contents_scale));
+  content_rect.Intersect(canvas_rect);
+
+  canvas->clipRect(gfx::RectToSkRect(content_rect), SkRegion::kIntersect_Op);
+
+  DCHECK(display_list_.get());
+  display_list_->Raster(canvas, callback, contents_scale);
+}
+
+skia::RefPtr<SkPicture> DisplayListRasterSource::GetFlattenedPicture() {
+  TRACE_EVENT0("cc", "DisplayListRasterSource::GetFlattenedPicture");
+
+  gfx::Rect display_list_rect(size_);
+  SkPictureRecorder recorder;
+  SkCanvas* canvas = recorder.beginRecording(display_list_rect.width(),
+                                             display_list_rect.height());
+  if (!display_list_rect.IsEmpty())
+    PlaybackToCanvas(canvas, display_list_rect, 1.0);
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
+
+  return picture;
+}
+
+size_t DisplayListRasterSource::GetPictureMemoryUsage() const {
+  return display_list_->PictureMemoryUsage();
+}
+
+void DisplayListRasterSource::PerformSolidColorAnalysis(
+    const gfx::Rect& content_rect,
+    float contents_scale,
+    RasterSource::SolidColorAnalysis* analysis) const {
+  DCHECK(analysis);
+  TRACE_EVENT0("cc", "DisplayListRasterSource::PerformSolidColorAnalysis");
+
+  gfx::Rect layer_rect =
+      gfx::ScaleToEnclosingRect(content_rect, 1.0f / contents_scale);
+
+  layer_rect.Intersect(gfx::Rect(size_));
+  skia::AnalysisCanvas canvas(layer_rect.width(), layer_rect.height());
+  RasterForAnalysis(&canvas, layer_rect, 1.0f);
+  analysis->is_solid_color = canvas.GetColorIfSolid(&analysis->solid_color);
+}
+
+void DisplayListRasterSource::GatherPixelRefs(
+    const gfx::Rect& content_rect,
+    float contents_scale,
+    std::vector<SkPixelRef*>* pixel_refs) const {
+  // TODO(ajuma): Implement this.
+}
+
+bool DisplayListRasterSource::CoversRect(const gfx::Rect& content_rect,
+                                         float contents_scale) const {
+  if (size_.IsEmpty())
+    return false;
+  gfx::Rect layer_rect =
+      gfx::ScaleToEnclosingRect(content_rect, 1.f / contents_scale);
+  layer_rect.Intersect(gfx::Rect(size_));
+
+  return recorded_viewport_.Contains(layer_rect);
+}
+
+gfx::Size DisplayListRasterSource::GetSize() const {
+  return size_;
+}
+
+bool DisplayListRasterSource::IsSolidColor() const {
+  return is_solid_color_;
+}
+
+SkColor DisplayListRasterSource::GetSolidColor() const {
+  DCHECK(IsSolidColor());
+  return solid_color_;
+}
+
+bool DisplayListRasterSource::HasRecordings() const {
+  return !!display_list_.get();
+}
+
+void DisplayListRasterSource::SetShouldAttemptToUseDistanceFieldText() {
+  should_attempt_to_use_distance_field_text_ = true;
+}
+
+void DisplayListRasterSource::SetBackgoundColor(SkColor background_color) {
+  background_color_ = background_color;
+}
+
+void DisplayListRasterSource::SetRequiresClear(bool requires_clear) {
+  requires_clear_ = requires_clear;
+}
+
+bool DisplayListRasterSource::ShouldAttemptToUseDistanceFieldText() const {
+  return should_attempt_to_use_distance_field_text_;
+}
+
+void DisplayListRasterSource::AsValueInto(
+    base::debug::TracedValue* array) const {
+  if (display_list_.get())
+    TracedValue::AppendIDRef(display_list_.get(), array);
+}
+
+void DisplayListRasterSource::DidBeginTracing() {
+  if (display_list_.get())
+    display_list_->EmitTraceSnapshot();
+}
+
+bool DisplayListRasterSource::CanUseLCDText() const {
+  return can_use_lcd_text_;
+}
+
+}  // namespace cc