Use better algorithm to scale browser action icons

chrome/browser/ui/extensions/icon_with_badge_image_source.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 "chrome/browser/ui/extensions/icon_with_badge_image_source.h"
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 
@@ skipping 71 matching lines @@
           base_font.GetFontName().c_str(), SkTypeface::kNormal));
       DCHECK(typeface);
     }
 
     text_paint->setTypeface(typeface.get());
     // |text_paint| adds its own ref. Release the ref from CreateFontName.
   }
   return text_paint;
 }
 
+gfx::ImageSkiaRep ScaleImageSkiaRep(const gfx::ImageSkiaRep& rep,
+                                    float target_scale) {
+  gfx::Size scaled_size =
+      gfx::ScaleToCeiledSize(rep.pixel_size(), target_scale / rep.scale());
+  return gfx::ImageSkiaRep(skia::ImageOperations::Resize(
+      rep.sk_bitmap(),
+      skia::ImageOperations::RESIZE_BEST,
+      scaled_size.width(),
+      scaled_size.height()), target_scale);
+}
+
 }  // namespace
 
 IconWithBadgeImageSource::Badge::Badge(const std::string& text,
                                        SkColor text_color,
                                        SkColor background_color)
     : text(text), text_color(text_color), background_color(background_color) {}
 
 IconWithBadgeImageSource::Badge::~Badge() {}
 
 IconWithBadgeImageSource::IconWithBadgeImageSource(const gfx::Size& size)
     : gfx::CanvasImageSource(size, false),
       grayscale_(false),
       paint_decoration_(false) {}
 
 IconWithBadgeImageSource::~IconWithBadgeImageSource() {}
 
 void IconWithBadgeImageSource::SetIcon(const gfx::Image& icon) {
   icon_ = icon;
 }
 
 void IconWithBadgeImageSource::SetBadge(scoped_ptr<Badge> badge) {
   badge_ = std::move(badge);
 }
 
 void IconWithBadgeImageSource::Draw(gfx::Canvas* canvas) {
   if (icon_.IsEmpty())
     return;
 
+  gfx::ImageSkia skia = icon_.AsImageSkia();
+  // TODO(estade): Fix setIcon and enable this on !MD.
+  if (ui::MaterialDesignController::IsModeMaterial()) {
+    gfx::ImageSkiaRep rep = skia.GetRepresentation(canvas->image_scale());
+    if (rep.scale() != canvas->image_scale())
+      skia.AddRepresentation(ScaleImageSkiaRep(rep, canvas->image_scale()));
+  }
+  if (grayscale_)
+    skia = gfx::ImageSkiaOperations::CreateHSLShiftedImage(skia, {-1, 0, 0.6});
+
   int x_offset = std::floor((size().width() - icon_.Width()) / 2.0);
   int y_offset = std::floor((size().height() - icon_.Height()) / 2.0);
-  gfx::ImageSkia skia = icon_.AsImageSkia();
-  if (grayscale_)
-    skia = gfx::ImageSkiaOperations::CreateHSLShiftedImage(skia, {-1, 0, 0.6});
   canvas->DrawImageInt(skia, x_offset, y_offset);
 
   // Draw a badge on the provided browser action icon's canvas.
   PaintBadge(canvas);
 
   if (paint_decoration_)
     PaintDecoration(canvas);
 }
 
 // Paints badge with specified parameters to |canvas|.
@@ skipping 120 matching lines @@
   gfx::Point center_point(major_radius + 1, size().height() - (major_radius)-1);
   SkPaint paint;
   paint.setAntiAlias(true);
   paint.setStyle(SkPaint::kFill_Style);
   paint.setColor(SK_ColorTRANSPARENT);
   paint.setXfermodeMode(SkXfermode::kSrc_Mode);
   canvas->DrawCircle(center_point, major_radius, paint);
   paint.setColor(decoration_color);
   canvas->DrawCircle(center_point, minor_radius, paint);
 }