Implements core logic for Pixel Canvas

ui/gfx/canvas.cc

 // Copyright (c) 2012 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 "ui/gfx/canvas.h"
 
 #include <cmath>
 #include <limits>
 
 #include "base/i18n/rtl.h"
@@ skipping 171 matching lines @@
     return true;
   }
   *bounds = gfx::Rect();
   return false;
 }
 
 void Canvas::Translate(const Vector2d& offset) {
   canvas_->translate(SkIntToScalar(offset.x()), SkIntToScalar(offset.y()));
 }
 
-void Canvas::Scale(int x_scale, int y_scale) {
-  canvas_->scale(SkIntToScalar(x_scale), SkIntToScalar(y_scale));
+void Canvas::Scale(float x_scale, float y_scale) {
+  canvas_->scale(SkFloatToScalar(x_scale), SkFloatToScalar(y_scale));
 }
 
 void Canvas::DrawColor(SkColor color) {
   DrawColor(color, SkBlendMode::kSrcOver);
 }
 
 void Canvas::DrawColor(SkColor color, SkBlendMode mode) {
   canvas_->drawColor(color, mode);
 }
 
@@ skipping 365 matching lines @@
   bitmap_.emplace();
   bitmap_->allocPixels(info);
   // Ensure that the bitmap is zeroed, since the code expects that.
   memset(bitmap_->getPixels(), 0, bitmap_->getSafeSize());
 
   owned_canvas_.emplace(bitmap_.value());
   return &owned_canvas_.value();
 }
 
 }  // namespace gfx