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| 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 "skia/ext/skia_utils_ios.h" | |
| 6 | |
| 7 #import <ImageIO/ImageIO.h> | |
| 8 #import <UIKit/UIKit.h> | |
| 9 | |
| 10 #include "base/ios/ios_util.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/mac/scoped_cftyperef.h" | |
| 13 #include "base/macros.h" | |
| 14 #include "third_party/skia/include/utils/mac/SkCGUtils.h" | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 const uint8 kICOHeaderMagic[4] = {0x00, 0x00, 0x01, 0x00}; | |
| 19 | |
| 20 // Returns whether the data encodes an ico image. | |
| 21 bool EncodesIcoImage(NSData* image_data) { | |
| 22 if (image_data.length < arraysize(kICOHeaderMagic)) | |
| 23 return false; | |
| 24 return memcmp(kICOHeaderMagic, image_data.bytes, | |
| 25 arraysize(kICOHeaderMagic)) == 0; | |
| 26 } | |
| 27 | |
| 28 } // namespace | |
| 29 | |
| 30 namespace gfx { | |
| 31 | |
| 32 SkBitmap CGImageToSkBitmap(CGImageRef image, CGSize size, bool is_opaque) { | |
| 33 SkBitmap bitmap; | |
| 34 if (!image) | |
| 35 return bitmap; | |
| 36 | |
| 37 if (!bitmap.tryAllocN32Pixels(size.width, size.height, is_opaque)) | |
| 38 return bitmap; | |
| 39 | |
| 40 void* data = bitmap.getPixels(); | |
| 41 | |
| 42 // Allocate a bitmap context with 4 components per pixel (BGRA). Apple | |
| 43 // recommends these flags for improved CG performance. | |
| 44 #define HAS_ARGB_SHIFTS(a, r, g, b) \ | |
| 45 (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \ | |
| 46 && SK_G32_SHIFT == (g) && SK_B32_SHIFT == (b)) | |
| 47 #if defined(SK_CPU_LENDIAN) && HAS_ARGB_SHIFTS(24, 16, 8, 0) | |
| 48 base::ScopedCFTypeRef<CGColorSpaceRef> color_space( | |
| 49 CGColorSpaceCreateDeviceRGB()); | |
| 50 base::ScopedCFTypeRef<CGContextRef> context(CGBitmapContextCreate( | |
| 51 data, | |
| 52 size.width, | |
| 53 size.height, | |
| 54 8, | |
| 55 size.width * 4, | |
| 56 color_space, | |
| 57 kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host)); | |
| 58 #else | |
| 59 #error We require that Skia's and CoreGraphics's recommended \ | |
| 60 image memory layout match. | |
| 61 #endif | |
| 62 #undef HAS_ARGB_SHIFTS | |
| 63 | |
| 64 DCHECK(context); | |
| 65 if (!context) | |
| 66 return bitmap; | |
| 67 | |
| 68 CGRect imageRect = CGRectMake(0.0, 0.0, size.width, size.height); | |
| 69 CGContextSetBlendMode(context, kCGBlendModeCopy); | |
| 70 CGContextDrawImage(context, imageRect, image); | |
| 71 | |
| 72 return bitmap; | |
| 73 } | |
| 74 | |
| 75 UIImage* SkBitmapToUIImageWithColorSpace(const SkBitmap& skia_bitmap, | |
| 76 CGFloat scale, | |
| 77 CGColorSpaceRef color_space) { | |
| 78 if (skia_bitmap.isNull()) | |
| 79 return nil; | |
| 80 | |
| 81 // First convert SkBitmap to CGImageRef. | |
| 82 base::ScopedCFTypeRef<CGImageRef> cg_image( | |
| 83 SkCreateCGImageRefWithColorspace(skia_bitmap, color_space)); | |
| 84 | |
| 85 // Now convert to UIImage. | |
| 86 return [UIImage imageWithCGImage:cg_image.get() | |
| 87 scale:scale | |
| 88 orientation:UIImageOrientationUp]; | |
| 89 } | |
| 90 | |
| 91 std::vector<SkBitmap> ImageDataToSkBitmaps(NSData* image_data) { | |
| 92 DCHECK(image_data); | |
| 93 | |
| 94 // On iOS 8.1.1 |CGContextDrawImage| crashes when processing images included | |
| 95 // in .ico files that are 88x88 pixels or larger (http://crbug.com/435068). | |
| 96 bool skip_images_88x88_or_larger = | |
| 97 base::ios::IsRunningOnOrLater(8, 1, 1) && EncodesIcoImage(image_data); | |
| 98 | |
| 99 base::ScopedCFTypeRef<CFDictionaryRef> empty_dictionary( | |
| 100 CFDictionaryCreate(NULL, NULL, NULL, 0, NULL, NULL)); | |
| 101 std::vector<SkBitmap> frames; | |
| 102 | |
| 103 base::ScopedCFTypeRef<CGImageSourceRef> source( | |
| 104 CGImageSourceCreateWithData((CFDataRef)image_data, empty_dictionary)); | |
| 105 | |
| 106 size_t count = CGImageSourceGetCount(source); | |
| 107 for (size_t index = 0; index < count; ++index) { | |
| 108 base::ScopedCFTypeRef<CGImageRef> cg_image( | |
| 109 CGImageSourceCreateImageAtIndex(source, index, empty_dictionary)); | |
| 110 | |
| 111 CGSize size = CGSizeMake(CGImageGetWidth(cg_image), | |
| 112 CGImageGetHeight(cg_image)); | |
| 113 if (size.width >= 88 && size.height >= 88 && skip_images_88x88_or_larger) | |
| 114 continue; | |
| 115 | |
| 116 const SkBitmap bitmap = CGImageToSkBitmap(cg_image, size, false); | |
| 117 if (!bitmap.empty()) | |
| 118 frames.push_back(bitmap); | |
| 119 } | |
| 120 | |
| 121 DLOG_IF(WARNING, frames.size() != count) << "Only decoded " << frames.size() | |
| 122 << " frames for " << count << " expected."; | |
| 123 return frames; | |
| 124 } | |
| 125 | |
| 126 } // namespace gfx | |
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Chromium Code Reviews
Issue 2011713003:
Roll skia to 8cc209111876b7c78b5ec577c9221d8ed5e21024 (Closed)
Base URL: git@github.com:domokit/mojo.git@master