The Tor Browser: gfx/skia/trunk/src/images/SkImageDecoder.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/images/SkImageDecoder.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/images/SkImageDecoder.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 2006 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 "SkImageDecoder.h"
 #include "SkBitmap.h"
 #include "SkImagePriv.h"
 #include "SkPixelRef.h"
 #include "SkStream.h"
 #include "SkTemplates.h"
 #include "SkCanvas.h"
 static SkBitmap::Config gDeviceConfig = SkBitmap::kNo_Config;
 SkBitmap::Config SkImageDecoder::GetDeviceConfig()
 {
     return gDeviceConfig;
 }
 void SkImageDecoder::SetDeviceConfig(SkBitmap::Config config)
 {
     gDeviceConfig = config;
 }
 ///////////////////////////////////////////////////////////////////////////////
 SkImageDecoder::SkImageDecoder()
     : fPeeker(NULL)
     , fChooser(NULL)
     , fAllocator(NULL)
     , fSampleSize(1)
     , fDefaultPref(SkBitmap::kNo_Config)
     , fDitherImage(true)
     , fUsePrefTable(false)
     , fSkipWritingZeroes(false)
     , fPreferQualityOverSpeed(false)
     , fRequireUnpremultipliedColors(false) {
 }
 SkImageDecoder::~SkImageDecoder() {
     SkSafeUnref(fPeeker);
     SkSafeUnref(fChooser);
     SkSafeUnref(fAllocator);
 }
 void SkImageDecoder::copyFieldsToOther(SkImageDecoder* other) {
     if (NULL == other) {
         return;
     }
     other->setPeeker(fPeeker);
     other->setChooser(fChooser);
     other->setAllocator(fAllocator);
     other->setSampleSize(fSampleSize);
     if (fUsePrefTable) {
         other->setPrefConfigTable(fPrefTable);
     } else {
         other->fDefaultPref = fDefaultPref;
     }
     other->setDitherImage(fDitherImage);
     other->setSkipWritingZeroes(fSkipWritingZeroes);
     other->setPreferQualityOverSpeed(fPreferQualityOverSpeed);
     other->setRequireUnpremultipliedColors(fRequireUnpremultipliedColors);
 }
 SkImageDecoder::Format SkImageDecoder::getFormat() const {
     return kUnknown_Format;
 }
 const char* SkImageDecoder::getFormatName() const {
     return GetFormatName(this->getFormat());
 }
 const char* SkImageDecoder::GetFormatName(Format format) {
     switch (format) {
         case kUnknown_Format:
             return "Unknown Format";
         case kBMP_Format:
             return "BMP";
         case kGIF_Format:
             return "GIF";
         case kICO_Format:
             return "ICO";
         case kJPEG_Format:
             return "JPEG";
         case kPNG_Format:
             return "PNG";
         case kWBMP_Format:
             return "WBMP";
         case kWEBP_Format:
             return "WEBP";
         default:
             SkDEBUGFAIL("Invalid format type!");
     }
     return "Unknown Format";
 }
 SkImageDecoder::Peeker* SkImageDecoder::setPeeker(Peeker* peeker) {
     SkRefCnt_SafeAssign(fPeeker, peeker);
     return peeker;
 }
 SkImageDecoder::Chooser* SkImageDecoder::setChooser(Chooser* chooser) {
     SkRefCnt_SafeAssign(fChooser, chooser);
     return chooser;
 }
 SkBitmap::Allocator* SkImageDecoder::setAllocator(SkBitmap::Allocator* alloc) {
     SkRefCnt_SafeAssign(fAllocator, alloc);
     return alloc;
 }
 void SkImageDecoder::setSampleSize(int size) {
     if (size < 1) {
         size = 1;
     }
     fSampleSize = size;
 }
 bool SkImageDecoder::chooseFromOneChoice(SkBitmap::Config config, int width,
                                          int height) const {
     Chooser* chooser = fChooser;
     if (NULL == chooser) {    // no chooser, we just say YES to decoding :)
         return true;
     }
     chooser->begin(1);
     chooser->inspect(0, config, width, height);
     return chooser->choose() == 0;
 }
 bool SkImageDecoder::allocPixelRef(SkBitmap* bitmap,
                                    SkColorTable* ctable) const {
     return bitmap->allocPixels(fAllocator, ctable);
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkImageDecoder::setPrefConfigTable(const PrefConfigTable& prefTable) {
     fUsePrefTable = true;
     fPrefTable = prefTable;
 }
 SkBitmap::Config SkImageDecoder::getPrefConfig(SrcDepth srcDepth,
                                                bool srcHasAlpha) const {
     SkBitmap::Config config = SkBitmap::kNo_Config;
     if (fUsePrefTable) {
         switch (srcDepth) {
             case kIndex_SrcDepth:
                 config = srcHasAlpha ? fPrefTable.fPrefFor_8Index_YesAlpha_src
                                      : fPrefTable.fPrefFor_8Index_NoAlpha_src;
                 break;
             case k8BitGray_SrcDepth:
                 config = fPrefTable.fPrefFor_8Gray_src;
                 break;
             case k32Bit_SrcDepth:
                 config = srcHasAlpha ? fPrefTable.fPrefFor_8bpc_YesAlpha_src
                                      : fPrefTable.fPrefFor_8bpc_NoAlpha_src;
                 break;
         }
     } else {
         config = fDefaultPref;
     }
     if (SkBitmap::kNo_Config == config) {
         config = SkImageDecoder::GetDeviceConfig();
     }
     return config;
 }
 bool SkImageDecoder::decode(SkStream* stream, SkBitmap* bm,
                             SkBitmap::Config pref, Mode mode) {
     // we reset this to false before calling onDecode
     fShouldCancelDecode = false;
     // assign this, for use by getPrefConfig(), in case fUsePrefTable is false
     fDefaultPref = pref;
     // pass a temporary bitmap, so that if we return false, we are assured of
     // leaving the caller's bitmap untouched.
     SkBitmap    tmp;
     if (!this->onDecode(stream, &tmp, mode)) {
         return false;
     }
     bm->swap(tmp);
     return true;
 }
 bool SkImageDecoder::decodeSubset(SkBitmap* bm, const SkIRect& rect,
                                   SkBitmap::Config pref) {
     // we reset this to false before calling onDecodeSubset
     fShouldCancelDecode = false;
     // assign this, for use by getPrefConfig(), in case fUsePrefTable is false
     fDefaultPref = pref;
     return this->onDecodeSubset(bm, rect);
 }
 bool SkImageDecoder::buildTileIndex(SkStreamRewindable* stream,
                                     int *width, int *height) {
     // we reset this to false before calling onBuildTileIndex
     fShouldCancelDecode = false;
     return this->onBuildTileIndex(stream, width, height);
 }
 bool SkImageDecoder::cropBitmap(SkBitmap *dst, SkBitmap *src, int sampleSize,
                                 int dstX, int dstY, int width, int height,
                                 int srcX, int srcY) {
     int w = width / sampleSize;
     int h = height / sampleSize;
     if (src->config() == SkBitmap::kIndex8_Config) {
         // kIndex8 does not allow drawing via an SkCanvas, as is done below.
         // Instead, use extractSubset. Note that this shares the SkPixelRef and
         // SkColorTable.
         // FIXME: Since src is discarded in practice, this holds on to more
         // pixels than is strictly necessary. Switch to a copy if memory
         // savings are more important than speed here. This also means
         // that the pixels in dst can not be reused (though there is no
         // allocation, which was already done on src).
         int x = (dstX - srcX) / sampleSize;
         int y = (dstY - srcY) / sampleSize;
         SkIRect subset = SkIRect::MakeXYWH(x, y, w, h);
         return src->extractSubset(dst, subset);
     }
     // if the destination has no pixels then we must allocate them.
     if (dst->isNull()) {
         dst->setConfig(src->config(), w, h, 0, src->alphaType());
         if (!this->allocPixelRef(dst, NULL)) {
             SkDEBUGF(("failed to allocate pixels needed to crop the bitmap"));
             return false;
         }
     }
     // check to see if the destination is large enough to decode the desired
     // region. If this assert fails we will just draw as much of the source
     // into the destination that we can.
     if (dst->width() < w || dst->height() < h) {
         SkDEBUGF(("SkImageDecoder::cropBitmap does not have a large enough bitmap.\n"));
     }
     // Set the Src_Mode for the paint to prevent transparency issue in the
     // dest in the event that the dest was being re-used.
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     SkCanvas canvas(*dst);
     canvas.drawSprite(*src, (srcX - dstX) / sampleSize,
                             (srcY - dstY) / sampleSize,
                             &paint);
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////
 bool SkImageDecoder::DecodeFile(const char file[], SkBitmap* bm,
                             SkBitmap::Config pref,  Mode mode, Format* format) {
     SkASSERT(file);
     SkASSERT(bm);
     SkAutoTUnref<SkStreamRewindable> stream(SkStream::NewFromFile(file));
     if (stream.get()) {
         if (SkImageDecoder::DecodeStream(stream, bm, pref, mode, format)) {
             bm->pixelRef()->setURI(file);
             return true;
         }
     }
     return false;
 }
 bool SkImageDecoder::DecodeMemory(const void* buffer, size_t size, SkBitmap* bm,
                           SkBitmap::Config pref, Mode mode, Format* format) {
     if (0 == size) {
         return false;
     }
     SkASSERT(buffer);
     SkMemoryStream  stream(buffer, size);
     return SkImageDecoder::DecodeStream(&stream, bm, pref, mode, format);
 }
 bool SkImageDecoder::DecodeStream(SkStreamRewindable* stream, SkBitmap* bm,
                                   SkBitmap::Config pref, Mode mode,
                                   Format* format) {
     SkASSERT(stream);
     SkASSERT(bm);
     bool success = false;
     SkImageDecoder* codec = SkImageDecoder::Factory(stream);
     if (NULL != codec) {
         success = codec->decode(stream, bm, pref, mode);
         if (success && format) {
             *format = codec->getFormat();
             if (kUnknown_Format == *format) {
                 if (stream->rewind()) {
                     *format = GetStreamFormat(stream);
                 }
             }
         }
         delete codec;
     }
     return success;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/images/SkImageDecoder.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/images/SkImageDecoder.cpp