Implements core logic for Pixel Canvas

cc/raster/raster_source.cc

Index: cc/raster/raster_source.cc
diff --git a/cc/raster/raster_source.cc b/cc/raster/raster_source.cc
index 124d5c5674eaa511e9880aa0c3373c326ae60cbf..04508b9cb9a388d6637e2a0ab9933faded563ab0 100644
--- a/cc/raster/raster_source.cc
+++ b/cc/raster/raster_source.cc
@@ -42,6 +42,7 @@ RasterSource::RasterSource(const RecordingSource* other, bool can_use_lcd_text)
       clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
       slow_down_raster_scale_factor_for_debug_(
           other->slow_down_raster_scale_factor_for_debug_),
+      recording_scale_factor_(other->recording_scale_factor_),
       image_decode_cache_(nullptr) {}
 
 RasterSource::RasterSource(const RasterSource* other, bool can_use_lcd_text)
@@ -57,6 +58,7 @@ RasterSource::RasterSource(const RasterSource* other, bool can_use_lcd_text)
       clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
       slow_down_raster_scale_factor_for_debug_(
           other->slow_down_raster_scale_factor_for_debug_),
+      recording_scale_factor_(other->recording_scale_factor_),
       image_decode_cache_(other->image_decode_cache_) {}
 
 RasterSource::~RasterSource() {}
@@ -80,7 +82,8 @@ void RasterSource::PlaybackToCanvas(
   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());
+  raster_canvas->scale(raster_transform.scale() / recording_scale_factor_,
+                       raster_transform.scale() / recording_scale_factor_);
   PlaybackToCanvas(raster_canvas, target_color_space, settings);
   raster_canvas->restore();
 }
@@ -242,6 +245,8 @@ bool RasterSource::PerformSolidColorAnalysis(gfx::Rect layer_rect,
   TRACE_EVENT0("cc", "RasterSource::PerformSolidColorAnalysis");
 
   layer_rect.Intersect(gfx::Rect(size_));
+  layer_rect =
+      gfx::ScaleToCornerScaledRect(layer_rect, recording_scale_factor_);

[vmpstr, 2017/07/07 22:56:42]

Could you add a couple of tests to raster_source_unittest that has different
recording_scale_factors?

   return display_list_->GetColorIfSolidInRect(layer_rect, color);
 }