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+// Copyright (c) 2009 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 <base/logging.h>
+#include "chrome/browser/cocoa/cocoa_utils.h"
+#import <QuartzCore/CIImage.h>
+#include "third_party/skia/include/utils/mac/SkCGUtils.h"
+#include "third_party/skia/include/core/SkColorPriv.h"
+
+namespace {
+
+// Callback passed to CGDataProviderCreateWithData()
+void ReleaseData(void* info, const void* pixelData, size_t size) {
+ // info is a non-const pixelData
+ if (info)
+ free(info);
+}
+
+}
+
+namespace CocoaUtils {
+
+NSImage* SkBitmapToNSImage(const SkBitmap& icon) {
+ // First convert SkBitmap to CGImageRef.
+ CGImageRef cgimage;
+ if (icon.config() != SkBitmap::kARGB_8888_Config) {
+ cgimage = SkCreateCGImageRef(icon);
+ } else {
+ // The above code returns a valid NSImage even in the
+ // kARGB_8888_Config case. As an example, the unit test which
+ // draws a blue SkBitmap can lockPixels, NSReadPixel, and pull out
+ // a single pixel from the NSImage and see it blue. However, the
+ // NSImage returned will be in ABGR format. Although Cocoa is
+ // otherwise happy with that format (as seen in simple tests
+ // outside Chromium), Chromium is NOT happy. In Chromium, B and R
+ // are swapped.
+ //
+ // As a hint, CIImage supports a few formats, such as ARGB.
+ // Interestingly, it does NOT support ABGR. I speculate there is
+ // some way we set up our drawing context which has the format
+ // specified wrong (in skia/ext/bitmap_platform_device_mac.cc),
+ // but I have not been able to solve this yet.
+ //
+ // TODO(jrg): track down the disconnect.
+ // TODO(jrg): Remove byte conversion.
+ // TODO(jrg): Fix unit tests to NOT swap bytes.
+ // http://crbug.com/14020
+ CGBitmapInfo info = (kCGImageAlphaPremultipliedFirst |
+ kCGBitmapByteOrder32Host);
+ int width = icon.width();
+ int height = icon.height();
+ int rowbytes = icon.rowBytes();
+ int rowwords = rowbytes/4;
+ unsigned length = rowbytes * height;
+ DCHECK(length > 0);
+ uint32_t* rawptr = static_cast<uint32_t*>(malloc(length));
+ DCHECK(rawptr);
+ if (!rawptr || !length)
+ return nil;
+
+ // Convert ABGR to ARGB
+ icon.lockPixels();
+ uint32_t* rawbitmap = static_cast<uint32_t*>(icon.getPixels());
+ uint32_t rawbit;
+ int offset;
+ for (int y = 0; y < height; y++) {
+ for (int x = 0; x < width; x++) {
+ offset = x + y*rowwords;
+ rawbit = rawbitmap[offset];
+ rawptr[offset] = SkPackARGB32(SkGetPackedA32(rawbit),
+ SkGetPackedR32(rawbit),
+ SkGetPackedG32(rawbit),
+ SkGetPackedB32(rawbit));
+ }
+ }
+ icon.unlockPixels();
+
+ CGDataProviderRef dataRef =
+ CGDataProviderCreateWithData(rawptr, rawptr, length, ReleaseData);
+ CGColorSpaceRef space = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
+ cgimage = CGImageCreate(width, height, 8,
+ icon.bytesPerPixel() * 8,
+ rowbytes, space, info, dataRef,
+ NULL, false, kCGRenderingIntentDefault);
+ CGColorSpaceRelease(space);
+ CGDataProviderRelease(dataRef);
+ }
+
+ // Now convert to NSImage.
+ NSBitmapImageRep* bitmap = [[[NSBitmapImageRep alloc]
+ initWithCGImage:cgimage] autorelease];
+ NSImage* image = [[[NSImage alloc] init] autorelease];
+ [image addRepresentation:bitmap];
+ return image;
+}
+
+} // namespace CocoaUtils
+