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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_unittest_util.h"
#import <CoreGraphics/CoreGraphics.h>
#include "base/apple/scoped_cftyperef.h"
#include "base/bit_cast.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_MAC)
#import <AppKit/AppKit.h>
#elif BUILDFLAG(IS_IOS)
#import <UIKit/UIKit.h>
#endif
namespace gfx::test {
// The |x| and |y| coordinates are interpreted as scale-independent on the Mac
// and on iOS.
SkColor GetPlatformImageColor(PlatformImage image, int x, int y) {
#if BUILDFLAG(IS_MAC)
CGImageRef image_ref = [image CGImageForProposedRect:nil
context:nil
hints:nil];
CGRect target_pixel =
CGRectMake(x * CGImageGetWidth(image_ref) / image.size.width,
y * CGImageGetHeight(image_ref) / image.size.height, 1, 1);
#elif BUILDFLAG(IS_IOS)
CGImageRef image_ref = image.CGImage;
CGRect target_pixel = CGRectMake(x * image.scale, y * image.scale, 1, 1);
#endif
// Start by extracting the target pixel into a 1x1 CGImage.
base::apple::ScopedCFTypeRef<CGImageRef> pixel_image(
CGImageCreateWithImageInRect(image_ref, target_pixel));
// Draw that pixel into a 1x1 bitmap context.
base::apple::ScopedCFTypeRef<CGColorSpaceRef> color_space(
CGColorSpaceCreateDeviceRGB());
base::apple::ScopedCFTypeRef<CGContextRef> bitmap_context(
CGBitmapContextCreate(
/*data=*/nullptr,
/*width=*/1,
/*height=*/1,
/*bitsPerComponent=*/8,
/*bytesPerRow=*/4, color_space.get(),
kCGImageAlphaPremultipliedFirst |
static_cast<CGImageAlphaInfo>(kCGBitmapByteOrder32Host)));
CGContextDrawImage(bitmap_context.get(), CGRectMake(0, 0, 1, 1),
pixel_image.get());
// The CGBitmapContext has the same memory layout as SkColor, so we can just
// read an SkColor straight out of the context.
return *reinterpret_cast<SkColor*>(
CGBitmapContextGetData(bitmap_context.get()));
}
} // namespace gfx::test
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