Implements core logic for Pixel Canvas

cc/raster/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/raster/raster_source.h"
 
 #include <stddef.h>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
@@ skipping 62 matching lines @@
       !raster_bounds.intersect(gfx::RectToSkIRect(canvas_playback_rect)))
     return;
   // Treat all subnormal values as zero for performance.
   ScopedSubnormalFloatDisabler disabler;
 
   raster_canvas->save();
   raster_canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
   raster_canvas->clipRect(SkRect::MakeFromIRect(raster_bounds));
   raster_canvas->translate(raster_transform.translation().x(),
                            raster_transform.translation().y());
-  raster_canvas->scale(raster_transform.scale(), raster_transform.scale());
+  if (!display_list_->pixel_canvas_enabled())
+    raster_canvas->scale(raster_transform.scale(), raster_transform.scale());
   PlaybackToCanvas(raster_canvas, target_color_space, settings);
   raster_canvas->restore();
 }
 
 void RasterSource::PlaybackToCanvas(SkCanvas* input_canvas,
                                     const gfx::ColorSpace& target_color_space,
                                     const PlaybackSettings& settings) const {
   SkCanvas* raster_canvas = input_canvas;
   std::unique_ptr<SkCanvas> color_transform_canvas;
   if (target_color_space.IsValid()) {
@@ skipping 136 matching lines @@
 
   return recorder.finishRecordingAsPicture();
 }
 
 size_t RasterSource::GetMemoryUsage() const {
   if (!display_list_)
     return 0;
   return display_list_->BytesUsed() + painter_reported_memory_usage_;
 }
 
-bool RasterSource::PerformSolidColorAnalysis(const gfx::Rect& content_rect,
-                                             float contents_scale,
-                                             SkColor* color) const {
+bool RasterSource::PerformSolidColorAnalysis(
+    gfx::Rect content_rect,
+    const gfx::AxisTransform2d& raster_transform,
+    SkColor* color) const {
   TRACE_EVENT0("cc", "RasterSource::PerformSolidColorAnalysis");
+  if (display_list_->pixel_canvas_enabled()) {
+    content_rect.Intersect(
+        gfx::ScaleToEnclosingRect(gfx::Rect(size_), raster_transform.scale()));
+  } else {
+    content_rect = gfx::ToEnclosingRect(
+        raster_transform.InverseMapRect(gfx::RectF(content_rect)));
+    content_rect.Intersect(gfx::Rect(size_));
+  }
+  skia::AnalysisCanvas canvas(content_rect.width(), content_rect.height());
+  canvas.translate(-content_rect.x(), -content_rect.y());
 
-  gfx::Rect layer_rect =
-      gfx::ScaleToEnclosingRect(content_rect, 1.f / contents_scale);
-
-  layer_rect.Intersect(gfx::Rect(size_));
-  skia::AnalysisCanvas canvas(layer_rect.width(), layer_rect.height());
-  canvas.translate(-layer_rect.x(), -layer_rect.y());
   // Note that because no color conversion is applied to solid color analysis,
   // the resulting solid color will be known to be sRGB.
   RasterCommon(&canvas, &canvas);
   return canvas.GetColorIfSolid(color);
 }
 
 void RasterSource::GetDiscardableImagesInRect(
     const gfx::Rect& layer_rect,
     float contents_scale,
     const gfx::ColorSpace& target_color_space,
@@ skipping 63 matching lines @@
       use_image_hijack_canvas(true) {}
 
 RasterSource::PlaybackSettings::PlaybackSettings(const PlaybackSettings&) =
     default;
 
 RasterSource::PlaybackSettings::PlaybackSettings(PlaybackSettings&&) = default;
 
 RasterSource::PlaybackSettings::~PlaybackSettings() = default;
 
 }  // namespace cc