Raster PictureLayerTiling with fractional translation

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"
 #include "cc/base/region.h"
+#include "cc/base/scale_translate2d.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/debug/traced_value.h"
 #include "cc/paint/display_item_list.h"
 #include "cc/raster/image_hijack_canvas.h"
 #include "cc/raster/skip_image_canvas.h"
 #include "skia/ext/analysis_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColorSpaceXformCanvas.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "ui/gfx/geometry/rect_conversions.h"
@@ skipping 35 matching lines @@
       slow_down_raster_scale_factor_for_debug_(
           other->slow_down_raster_scale_factor_for_debug_),
       image_decode_cache_(other->image_decode_cache_) {}
 
 RasterSource::~RasterSource() {}
 
 void RasterSource::PlaybackToCanvas(SkCanvas* raster_canvas,
                                     const gfx::ColorSpace& canvas_color_space,
                                     const gfx::Rect& canvas_bitmap_rect,
                                     const gfx::Rect& canvas_playback_rect,
-                                    float raster_scale,
+                                    const ScaleTranslate2d& raster_transform,
                                     const PlaybackSettings& settings) const {
   SkIRect raster_bounds = gfx::RectToSkIRect(canvas_bitmap_rect);
   if (!canvas_playback_rect.IsEmpty() &&
       !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->scale(raster_scale, raster_scale);
+  raster_transform.ApplyToCanvas(raster_canvas);
   PlaybackToCanvas(raster_canvas, canvas_color_space, settings);
   raster_canvas->restore();
 }
 
 void RasterSource::PlaybackToCanvas(SkCanvas* raster_canvas,
                                     const gfx::ColorSpace& canvas_color_space,
                                     const PlaybackSettings& settings) const {
   if (!settings.playback_to_shared_canvas)
     PrepareForPlaybackToCanvas(raster_canvas);
 
@@ skipping 230 matching lines @@
       use_image_hijack_canvas(true) {}
 
 RasterSource::PlaybackSettings::PlaybackSettings(const PlaybackSettings&) =
     default;
 
 RasterSource::PlaybackSettings::PlaybackSettings(PlaybackSettings&&) = default;
 
 RasterSource::PlaybackSettings::~PlaybackSettings() = default;
 
 }  // namespace cc