The Tor Browser: gfx/skia/trunk/src/ports/SkImageDecoder

gfx/skia/trunk/src/ports/SkImageDecoder_CG.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkImageDecoder_CG.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkCGUtils.h"
 #include "SkColorPriv.h"
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkMovie.h"
 #include "SkStream.h"
 #include "SkStreamHelpers.h"
 #include "SkTemplates.h"
 #include "SkUnPreMultiply.h"
 #ifdef SK_BUILD_FOR_MAC
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 #ifdef SK_BUILD_FOR_IOS
 #include <CoreGraphics/CoreGraphics.h>
 #include <ImageIO/ImageIO.h>
 #include <MobileCoreServices/MobileCoreServices.h>
 #endif
 static void malloc_release_proc(void* info, const void* data, size_t size) {
     sk_free(info);
 }
 static CGDataProviderRef SkStreamToDataProvider(SkStream* stream) {
     // TODO: use callbacks, so we don't have to load all the data into RAM
     SkAutoMalloc storage;
     const size_t len = CopyStreamToStorage(&storage, stream);
     void* data = storage.detach();
     return CGDataProviderCreateWithData(data, data, len, malloc_release_proc);
 }
 static CGImageSourceRef SkStreamToCGImageSource(SkStream* stream) {
     CGDataProviderRef data = SkStreamToDataProvider(stream);
     CGImageSourceRef imageSrc = CGImageSourceCreateWithDataProvider(data, 0);
     CGDataProviderRelease(data);
     return imageSrc;
 }
 class SkImageDecoder_CG : public SkImageDecoder {
 protected:
     virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode);
 };
 #define BITMAP_INFO (kCGBitmapByteOrder32Big | kCGImageAlphaPremultipliedLast)
 bool SkImageDecoder_CG::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     CGImageSourceRef imageSrc = SkStreamToCGImageSource(stream);
     if (NULL == imageSrc) {
         return false;
     }
     SkAutoTCallVProc<const void, CFRelease> arsrc(imageSrc);
     CGImageRef image = CGImageSourceCreateImageAtIndex(imageSrc, 0, NULL);
     if (NULL == image) {
         return false;
     }
     SkAutoTCallVProc<CGImage, CGImageRelease> arimage(image);
     const int width = SkToInt(CGImageGetWidth(image));
     const int height = SkToInt(CGImageGetHeight(image));
     bm->setConfig(SkBitmap::kARGB_8888_Config, width, height);
     if (SkImageDecoder::kDecodeBounds_Mode == mode) {
         return true;
     }
     if (!this->allocPixelRef(bm, NULL)) {
         return false;
     }
     bm->lockPixels();
     bm->eraseColor(SK_ColorTRANSPARENT);
     CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
     CGContextRef cg = CGBitmapContextCreate(bm->getPixels(), width, height, 8, bm->rowBytes(), cs, BITMAP_INFO);
     CFRelease(cs);
     CGContextDrawImage(cg, CGRectMake(0, 0, width, height), image);
     CGContextRelease(cg);
     CGImageAlphaInfo info = CGImageGetAlphaInfo(image);
     switch (info) {
         case kCGImageAlphaNone:
         case kCGImageAlphaNoneSkipLast:
         case kCGImageAlphaNoneSkipFirst:
             SkASSERT(SkBitmap::ComputeIsOpaque(*bm));
             bm->setAlphaType(kOpaque_SkAlphaType);
             break;
         default:
             // we don't know if we're opaque or not, so compute it.
             if (SkBitmap::ComputeIsOpaque(*bm)) {
                 bm->setAlphaType(kOpaque_SkAlphaType);
             }
     }
     if (!bm->isOpaque() && this->getRequireUnpremultipliedColors()) {
         // CGBitmapContext does not support unpremultiplied, so the image has been premultiplied.
         // Convert to unpremultiplied.
         for (int i = 0; i < width; ++i) {
             for (int j = 0; j < height; ++j) {
                 uint32_t* addr = bm->getAddr32(i, j);
                 *addr = SkUnPreMultiply::UnPreMultiplyPreservingByteOrder(*addr);
             }
         }
         bm->setAlphaType(kUnpremul_SkAlphaType);
     }
     bm->unlockPixels();
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////
 extern SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*);
 SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) {
     SkImageDecoder* decoder = image_decoder_from_stream(stream);
     if (NULL == decoder) {
         // If no image decoder specific to the stream exists, use SkImageDecoder_CG.
         return SkNEW(SkImageDecoder_CG);
     } else {
         return decoder;
     }
 }
 /////////////////////////////////////////////////////////////////////////
 SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) {
     return NULL;
 }
 /////////////////////////////////////////////////////////////////////////
 static size_t consumer_put(void* info, const void* buffer, size_t count) {
     SkWStream* stream = reinterpret_cast<SkWStream*>(info);
     return stream->write(buffer, count) ? count : 0;
 }
 static void consumer_release(void* info) {
     // we do nothing, since by design we don't "own" the stream (i.e. info)
 }
 static CGDataConsumerRef SkStreamToCGDataConsumer(SkWStream* stream) {
     CGDataConsumerCallbacks procs;
     procs.putBytes = consumer_put;
     procs.releaseConsumer = consumer_release;
     // we don't own/reference the stream, so it our consumer must not live
     // longer that our caller's ownership of the stream
     return CGDataConsumerCreate(stream, &procs);
 }
 static CGImageDestinationRef SkStreamToImageDestination(SkWStream* stream,
                                                         CFStringRef type) {
     CGDataConsumerRef consumer = SkStreamToCGDataConsumer(stream);
     if (NULL == consumer) {
         return NULL;
     }
     SkAutoTCallVProc<const void, CFRelease> arconsumer(consumer);
     return CGImageDestinationCreateWithDataConsumer(consumer, type, 1, NULL);
 }
 class SkImageEncoder_CG : public SkImageEncoder {
 public:
     SkImageEncoder_CG(Type t) : fType(t) {}
 protected:
     virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality);
 private:
     Type fType;
 };
 /*  Encode bitmaps via CGImageDestination. We setup a DataConsumer which writes
     to our SkWStream. Since we don't reference/own the SkWStream, our consumer
     must only live for the duration of the onEncode() method.
  */
 bool SkImageEncoder_CG::onEncode(SkWStream* stream, const SkBitmap& bm,
                                  int quality) {
     // Used for converting a bitmap to 8888.
     const SkBitmap* bmPtr = &bm;
     SkBitmap bitmap8888;
     CFStringRef type;
     switch (fType) {
         case kICO_Type:
             type = kUTTypeICO;
             break;
         case kBMP_Type:
             type = kUTTypeBMP;
             break;
         case kGIF_Type:
             type = kUTTypeGIF;
             break;
         case kJPEG_Type:
             type = kUTTypeJPEG;
             break;
         case kPNG_Type:
             // PNG encoding an ARGB_4444 bitmap gives the following errors in GM:
             // <Error>: CGImageDestinationAddImage image could not be converted to destination
             // format.
             // <Error>: CGImageDestinationFinalize image destination does not have enough images
             // So instead we copy to 8888.
             if (bm.colorType() == kARGB_4444_SkColorType) {
                 bm.copyTo(&bitmap8888, kPMColor_SkColorType);
                 bmPtr = &bitmap8888;
             }
             type = kUTTypePNG;
             break;
         default:
             return false;
     }
     CGImageDestinationRef dst = SkStreamToImageDestination(stream, type);
     if (NULL == dst) {
         return false;
     }
     SkAutoTCallVProc<const void, CFRelease> ardst(dst);
     CGImageRef image = SkCreateCGImageRef(*bmPtr);
     if (NULL == image) {
         return false;
     }
     SkAutoTCallVProc<CGImage, CGImageRelease> agimage(image);
     CGImageDestinationAddImage(dst, image, NULL);
     return CGImageDestinationFinalize(dst);
 }
 ///////////////////////////////////////////////////////////////////////////////
 static SkImageEncoder* sk_imageencoder_cg_factory(SkImageEncoder::Type t) {
     switch (t) {
         case SkImageEncoder::kICO_Type:
         case SkImageEncoder::kBMP_Type:
         case SkImageEncoder::kGIF_Type:
         case SkImageEncoder::kJPEG_Type:
         case SkImageEncoder::kPNG_Type:
             break;
         default:
             return NULL;
     }
     return SkNEW_ARGS(SkImageEncoder_CG, (t));
 }
 static SkImageEncoder_EncodeReg gEReg(sk_imageencoder_cg_factory);
 struct FormatConversion {
     CFStringRef             fUTType;
     SkImageDecoder::Format  fFormat;
 };
 // Array of the types supported by the decoder.
 static const FormatConversion gFormatConversions[] = {
     { kUTTypeBMP, SkImageDecoder::kBMP_Format },
     { kUTTypeGIF, SkImageDecoder::kGIF_Format },
     { kUTTypeICO, SkImageDecoder::kICO_Format },
     { kUTTypeJPEG, SkImageDecoder::kJPEG_Format },
     // Also include JPEG2000
     { kUTTypeJPEG2000, SkImageDecoder::kJPEG_Format },
     { kUTTypePNG, SkImageDecoder::kPNG_Format },
 };
 static SkImageDecoder::Format UTType_to_Format(const CFStringRef uttype) {
     for (size_t i = 0; i < SK_ARRAY_COUNT(gFormatConversions); i++) {
         if (CFStringCompare(uttype, gFormatConversions[i].fUTType, 0) == kCFCompareEqualTo) {
             return gFormatConversions[i].fFormat;
         }
     }
     return SkImageDecoder::kUnknown_Format;
 }
 static SkImageDecoder::Format get_format_cg(SkStreamRewindable* stream) {
     CGImageSourceRef imageSrc = SkStreamToCGImageSource(stream);
     if (NULL == imageSrc) {
         return SkImageDecoder::kUnknown_Format;
     }
     SkAutoTCallVProc<const void, CFRelease> arsrc(imageSrc);
     const CFStringRef name = CGImageSourceGetType(imageSrc);
     if (NULL == name) {
         return SkImageDecoder::kUnknown_Format;
     }
     return UTType_to_Format(name);
 }
 static SkImageDecoder_FormatReg gFormatReg(get_format_cg);

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gfx/skia/trunk/src/ports/SkImageDecoder_CG.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkImageDecoder_CG.cpp