ui/gfx/image/image_skia_util_ios.mm

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/image/image_skia_util_ios.h"
   6
   7 #include <UIKit/UIKit.h>
   8
   9 #include "base/logging.h"
  10 #include "base/mac/scoped_cftyperef.h"
  11 #include "skia/ext/skia_utils_ios.h"
  12 #include "third_party/skia/include/core/SkBitmap.h"
  13 #include "ui/gfx/image/image_skia.h"
  14
  15 namespace gfx {
  16
  17 gfx::ImageSkia ImageSkiaFromUIImage(UIImage* image) {
  18   gfx::ImageSkia image_skia;
  19   float max_scale = ImageSkia::GetSupportedScales().back();
  20   gfx::ImageSkiaRep image_skia_rep = ImageSkiaRepOfScaleFromUIImage(
  21       image, max_scale);
  22   if (!image_skia_rep.is_null())
  23     image_skia.AddRepresentation(image_skia_rep);
  24   return image_skia;
  25 }
  26
  27 gfx::ImageSkiaRep ImageSkiaRepOfScaleFromUIImage(UIImage* image, float scale) {
  28   if (!image)
  29     return gfx::ImageSkiaRep();
  30
  31   CGSize size = image.size;
  32   CGSize desired_size_for_scale =
  33       CGSizeMake(size.width * scale, size.height * scale);
  34   SkBitmap bitmap(gfx::CGImageToSkBitmap(image.CGImage,
  35                                          desired_size_for_scale,
  36                                          false));
  37   return gfx::ImageSkiaRep(bitmap, scale);
  38 }
  39
  40 UIImage* UIImageFromImageSkia(const gfx::ImageSkia& image_skia) {
  41   return UIImageFromImageSkiaRep(
  42       image_skia.GetRepresentation(ImageSkia::GetSupportedScales().back()));
  43 }
  44
  45 UIImage* UIImageFromImageSkiaRep(const gfx::ImageSkiaRep& image_skia_rep) {
  46   if (image_skia_rep.is_null())
  47     return nil;
  48
  49   float scale = image_skia_rep.scale();
  50   base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
  51       CGColorSpaceCreateDeviceRGB());
  52   return gfx::SkBitmapToUIImageWithColorSpace(image_skia_rep.sk_bitmap(), scale,
  53                                               color_space);
  54 }
  55
  56 }  // namespace gfx