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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/image/image_skia_util_ios.h"
#import <UIKit/UIKit.h>
#include "base/apple/scoped_cftyperef.h"
#include "skia/ext/skia_utils_ios.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/resource/resource_scale_factor.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/image/image_skia_rep.h"
namespace gfx {
gfx::ImageSkia ImageSkiaFromUIImage(UIImage* image) {
gfx::ImageSkia image_skia;
const float max_scale = ui::GetScaleForMaxSupportedResourceScaleFactor();
gfx::ImageSkiaRep image_skia_rep = ImageSkiaRepOfScaleFromUIImage(
image, max_scale);
if (!image_skia_rep.is_null())
image_skia.AddRepresentation(image_skia_rep);
return image_skia;
}
gfx::ImageSkiaRep ImageSkiaRepOfScaleFromUIImage(UIImage* image, float scale) {
if (!image)
return gfx::ImageSkiaRep();
CGSize size = image.size;
CGSize desired_size_for_scale =
CGSizeMake(size.width * scale, size.height * scale);
SkBitmap bitmap(skia::CGImageToSkBitmap(image.CGImage,
desired_size_for_scale,
false));
// Resizing the image can fail.
// https://crbug.com/1184688, https://crbug.com/41495327
if (bitmap.empty()) {
return gfx::ImageSkiaRep();
}
CHECK_EQ(bitmap.colorType(), kN32_SkColorType);
return gfx::ImageSkiaRep(bitmap, scale);
}
UIImage* UIImageFromImageSkia(const gfx::ImageSkia& image_skia) {
const float max_scale = ui::GetScaleForMaxSupportedResourceScaleFactor();
return UIImageFromImageSkiaRep(image_skia.GetRepresentation(max_scale));
}
UIImage* UIImageFromImageSkiaRep(const gfx::ImageSkiaRep& image_skia_rep) {
if (image_skia_rep.is_null())
return nil;
float scale = image_skia_rep.scale();
base::apple::ScopedCFTypeRef<CGColorSpaceRef> color_space(
CGColorSpaceCreateDeviceRGB());
return skia::SkBitmapToUIImageWithColorSpace(image_skia_rep.GetBitmap(),
scale, color_space.get());
}
} // namespace gfx
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