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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "skia/ext/skia_utils_mac.h" | 5 #include "skia/ext/skia_utils_mac.h" |
| 6 | 6 |
| 7 #import <AppKit/AppKit.h> | 7 #import <AppKit/AppKit.h> |
| 8 | 8 |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "base/mac/scoped_cftyperef.h" | 10 #include "base/mac/scoped_cftyperef.h" |
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| 25 // Only image or image_rep should be provided, not both. | 25 // Only image or image_rep should be provided, not both. |
| 26 DCHECK((image != 0) ^ (image_rep != 0)); | 26 DCHECK((image != 0) ^ (image_rep != 0)); |
| 27 | 27 |
| 28 SkBitmap bitmap; | 28 SkBitmap bitmap; |
| 29 bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width, size.height); | 29 bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width, size.height); |
| 30 if (!bitmap.allocPixels()) | 30 if (!bitmap.allocPixels()) |
| 31 return bitmap; // Return |bitmap| which should respond true to isNull(). | 31 return bitmap; // Return |bitmap| which should respond true to isNull(). |
| 32 | 32 |
| 33 bitmap.setIsOpaque(is_opaque); | 33 bitmap.setIsOpaque(is_opaque); |
| 34 | 34 |
| 35 base::mac::ScopedCFTypeRef<CGColorSpaceRef> color_space( | 35 base::ScopedCFTypeRef<CGColorSpaceRef> color_space( |
| 36 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); | 36 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); |
| 37 void* data = bitmap.getPixels(); | 37 void* data = bitmap.getPixels(); |
| 38 | 38 |
| 39 // Allocate a bitmap context with 4 components per pixel (BGRA). Apple | 39 // Allocate a bitmap context with 4 components per pixel (BGRA). Apple |
| 40 // recommends these flags for improved CG performance. | 40 // recommends these flags for improved CG performance. |
| 41 #define HAS_ARGB_SHIFTS(a, r, g, b) \ | 41 #define HAS_ARGB_SHIFTS(a, r, g, b) \ |
| 42 (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \ | 42 (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \ |
| 43 && SK_G32_SHIFT == (g) && SK_B32_SHIFT == (b)) | 43 && SK_G32_SHIFT == (g) && SK_B32_SHIFT == (b)) |
| 44 #if defined(SK_CPU_LENDIAN) && HAS_ARGB_SHIFTS(24, 16, 8, 0) | 44 #if defined(SK_CPU_LENDIAN) && HAS_ARGB_SHIFTS(24, 16, 8, 0) |
| 45 base::mac::ScopedCFTypeRef<CGContextRef> context( | 45 base::ScopedCFTypeRef<CGContextRef> context(CGBitmapContextCreate( |
| 46 CGBitmapContextCreate(data, size.width, size.height, 8, size.width*4, | 46 data, |
| 47 color_space, | 47 size.width, |
| 48 kCGImageAlphaPremultipliedFirst | | 48 size.height, |
| 49 kCGBitmapByteOrder32Host)); | 49 8, |
| 50 size.width * 4, |
| 51 color_space, |
| 52 kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host)); |
| 50 #else | 53 #else |
| 51 #error We require that Skia's and CoreGraphics's recommended \ | 54 #error We require that Skia's and CoreGraphics's recommended \ |
| 52 image memory layout match. | 55 image memory layout match. |
| 53 #endif | 56 #endif |
| 54 #undef HAS_ARGB_SHIFTS | 57 #undef HAS_ARGB_SHIFTS |
| 55 | 58 |
| 56 // Something went really wrong. Best guess is that the bitmap data is invalid. | 59 // Something went really wrong. Best guess is that the bitmap data is invalid. |
| 57 DCHECK(context); | 60 DCHECK(context); |
| 58 | 61 |
| 59 [NSGraphicsContext saveGraphicsState]; | 62 [NSGraphicsContext saveGraphicsState]; |
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| 205 SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque) { | 208 SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque) { |
| 206 return NSImageOrNSImageRepToSkBitmap(image, nil, size, is_opaque); | 209 return NSImageOrNSImageRepToSkBitmap(image, nil, size, is_opaque); |
| 207 } | 210 } |
| 208 | 211 |
| 209 SkBitmap NSImageRepToSkBitmap( | 212 SkBitmap NSImageRepToSkBitmap( |
| 210 NSImageRep* image_rep, NSSize size, bool is_opaque) { | 213 NSImageRep* image_rep, NSSize size, bool is_opaque) { |
| 211 return NSImageOrNSImageRepToSkBitmap(nil, image_rep, size, is_opaque); | 214 return NSImageOrNSImageRepToSkBitmap(nil, image_rep, size, is_opaque); |
| 212 } | 215 } |
| 213 | 216 |
| 214 NSBitmapImageRep* SkBitmapToNSBitmapImageRep(const SkBitmap& skiaBitmap) { | 217 NSBitmapImageRep* SkBitmapToNSBitmapImageRep(const SkBitmap& skiaBitmap) { |
| 215 base::mac::ScopedCFTypeRef<CGColorSpaceRef> color_space( | 218 base::ScopedCFTypeRef<CGColorSpaceRef> color_space( |
| 216 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); | 219 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); |
| 217 return SkBitmapToNSBitmapImageRepWithColorSpace(skiaBitmap, color_space); | 220 return SkBitmapToNSBitmapImageRepWithColorSpace(skiaBitmap, color_space); |
| 218 } | 221 } |
| 219 | 222 |
| 220 NSBitmapImageRep* SkBitmapToNSBitmapImageRepWithColorSpace( | 223 NSBitmapImageRep* SkBitmapToNSBitmapImageRepWithColorSpace( |
| 221 const SkBitmap& skiaBitmap, | 224 const SkBitmap& skiaBitmap, |
| 222 CGColorSpaceRef colorSpace) { | 225 CGColorSpaceRef colorSpace) { |
| 223 // First convert SkBitmap to CGImageRef. | 226 // First convert SkBitmap to CGImageRef. |
| 224 base::mac::ScopedCFTypeRef<CGImageRef> cgimage( | 227 base::ScopedCFTypeRef<CGImageRef> cgimage( |
| 225 SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace)); | 228 SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace)); |
| 226 | 229 |
| 227 // Now convert to NSBitmapImageRep. | 230 // Now convert to NSBitmapImageRep. |
| 228 scoped_nsobject<NSBitmapImageRep> bitmap( | 231 scoped_nsobject<NSBitmapImageRep> bitmap( |
| 229 [[NSBitmapImageRep alloc] initWithCGImage:cgimage]); | 232 [[NSBitmapImageRep alloc] initWithCGImage:cgimage]); |
| 230 return [bitmap.release() autorelease]; | 233 return [bitmap.release() autorelease]; |
| 231 } | 234 } |
| 232 | 235 |
| 233 NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& skiaBitmap, | 236 NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& skiaBitmap, |
| 234 CGColorSpaceRef colorSpace) { | 237 CGColorSpaceRef colorSpace) { |
| 235 if (skiaBitmap.isNull()) | 238 if (skiaBitmap.isNull()) |
| 236 return nil; | 239 return nil; |
| 237 | 240 |
| 238 scoped_nsobject<NSImage> image([[NSImage alloc] init]); | 241 scoped_nsobject<NSImage> image([[NSImage alloc] init]); |
| 239 [image addRepresentation: | 242 [image addRepresentation: |
| 240 SkBitmapToNSBitmapImageRepWithColorSpace(skiaBitmap, colorSpace)]; | 243 SkBitmapToNSBitmapImageRepWithColorSpace(skiaBitmap, colorSpace)]; |
| 241 [image setSize:NSMakeSize(skiaBitmap.width(), skiaBitmap.height())]; | 244 [image setSize:NSMakeSize(skiaBitmap.width(), skiaBitmap.height())]; |
| 242 return [image.release() autorelease]; | 245 return [image.release() autorelease]; |
| 243 } | 246 } |
| 244 | 247 |
| 245 NSImage* SkBitmapToNSImage(const SkBitmap& skiaBitmap) { | 248 NSImage* SkBitmapToNSImage(const SkBitmap& skiaBitmap) { |
| 246 base::mac::ScopedCFTypeRef<CGColorSpaceRef> colorSpace( | 249 base::ScopedCFTypeRef<CGColorSpaceRef> colorSpace( |
| 247 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); | 250 CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB)); |
| 248 return SkBitmapToNSImageWithColorSpace(skiaBitmap, colorSpace.get()); | 251 return SkBitmapToNSImageWithColorSpace(skiaBitmap, colorSpace.get()); |
| 249 } | 252 } |
| 250 | 253 |
| 251 SkiaBitLocker::SkiaBitLocker(SkCanvas* canvas) | 254 SkiaBitLocker::SkiaBitLocker(SkCanvas* canvas) |
| 252 : canvas_(canvas), | 255 : canvas_(canvas), |
| 253 cgContext_(0) { | 256 cgContext_(0) { |
| 254 } | 257 } |
| 255 | 258 |
| 256 SkiaBitLocker::~SkiaBitLocker() { | 259 SkiaBitLocker::~SkiaBitLocker() { |
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| 356 useDeviceBits_ = deviceBits.getPixels(); | 359 useDeviceBits_ = deviceBits.getPixels(); |
| 357 if (useDeviceBits_) { | 360 if (useDeviceBits_) { |
| 358 bitmap_ = deviceBits; | 361 bitmap_ = deviceBits; |
| 359 bitmap_.lockPixels(); | 362 bitmap_.lockPixels(); |
| 360 } else { | 363 } else { |
| 361 bitmap_.setConfig( | 364 bitmap_.setConfig( |
| 362 SkBitmap::kARGB_8888_Config, deviceBits.width(), deviceBits.height()); | 365 SkBitmap::kARGB_8888_Config, deviceBits.width(), deviceBits.height()); |
| 363 bitmap_.allocPixels(); | 366 bitmap_.allocPixels(); |
| 364 bitmap_.eraseColor(0); | 367 bitmap_.eraseColor(0); |
| 365 } | 368 } |
| 366 base::mac::ScopedCFTypeRef<CGColorSpaceRef> colorSpace( | 369 base::ScopedCFTypeRef<CGColorSpaceRef> colorSpace( |
| 367 CGColorSpaceCreateDeviceRGB()); | 370 CGColorSpaceCreateDeviceRGB()); |
| 368 cgContext_ = CGBitmapContextCreate(bitmap_.getPixels(), bitmap_.width(), | 371 cgContext_ = CGBitmapContextCreate(bitmap_.getPixels(), bitmap_.width(), |
| 369 bitmap_.height(), 8, bitmap_.rowBytes(), colorSpace, | 372 bitmap_.height(), 8, bitmap_.rowBytes(), colorSpace, |
| 370 kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedFirst); | 373 kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedFirst); |
| 371 | 374 |
| 372 // Apply device matrix. | 375 // Apply device matrix. |
| 373 CGAffineTransform contentsTransform = CGAffineTransformMakeScale(1, -1); | 376 CGAffineTransform contentsTransform = CGAffineTransformMakeScale(1, -1); |
| 374 contentsTransform = CGAffineTransformTranslate(contentsTransform, 0, | 377 contentsTransform = CGAffineTransformTranslate(contentsTransform, 0, |
| 375 -device->height()); | 378 -device->height()); |
| 376 CGContextConcatCTM(cgContext_, contentsTransform); | 379 CGContextConcatCTM(cgContext_, contentsTransform); |
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| 405 // Apply content matrix. | 408 // Apply content matrix. |
| 406 SkMatrix skMatrix = canvas_->getTotalMatrix(); | 409 SkMatrix skMatrix = canvas_->getTotalMatrix(); |
| 407 skMatrix.postTranslate(-SkIntToScalar(pt.fX), -SkIntToScalar(pt.fY)); | 410 skMatrix.postTranslate(-SkIntToScalar(pt.fX), -SkIntToScalar(pt.fY)); |
| 408 CGAffineTransform affine = SkMatrixToCGAffineTransform(skMatrix); | 411 CGAffineTransform affine = SkMatrixToCGAffineTransform(skMatrix); |
| 409 CGContextConcatCTM(cgContext_, affine); | 412 CGContextConcatCTM(cgContext_, affine); |
| 410 | 413 |
| 411 return cgContext_; | 414 return cgContext_; |
| 412 } | 415 } |
| 413 | 416 |
| 414 } // namespace gfx | 417 } // namespace gfx |
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