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

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

gfx/skia/trunk/src/images/SkImageDecoder_libbmp.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 2007 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 "bmpdecoderhelper.h"
 #include "SkColorPriv.h"
 #include "SkImageDecoder.h"
 #include "SkScaledBitmapSampler.h"
 #include "SkStream.h"
 #include "SkStreamHelpers.h"
 #include "SkTDArray.h"
 class SkBMPImageDecoder : public SkImageDecoder {
 public:
     SkBMPImageDecoder() {}
     virtual Format getFormat() const SK_OVERRIDE {
         return kBMP_Format;
     }
 protected:
     virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode mode) SK_OVERRIDE;
 private:
     typedef SkImageDecoder INHERITED;
 };
 ///////////////////////////////////////////////////////////////////////////////
 DEFINE_DECODER_CREATOR(BMPImageDecoder);
 ///////////////////////////////////////////////////////////////////////////////
 static bool is_bmp(SkStreamRewindable* stream) {
     static const char kBmpMagic[] = { 'B', 'M' };
     char buffer[sizeof(kBmpMagic)];
     return stream->read(buffer, sizeof(kBmpMagic)) == sizeof(kBmpMagic) &&
         !memcmp(buffer, kBmpMagic, sizeof(kBmpMagic));
 }
 static SkImageDecoder* sk_libbmp_dfactory(SkStreamRewindable* stream) {
     if (is_bmp(stream)) {
         return SkNEW(SkBMPImageDecoder);
     }
     return NULL;
 }
 static SkImageDecoder_DecodeReg gReg(sk_libbmp_dfactory);
 static SkImageDecoder::Format get_format_bmp(SkStreamRewindable* stream) {
     if (is_bmp(stream)) {
         return SkImageDecoder::kBMP_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 static SkImageDecoder_FormatReg gFormatReg(get_format_bmp);
 ///////////////////////////////////////////////////////////////////////////////
 class SkBmpDecoderCallback : public image_codec::BmpDecoderCallback {
 public:
     // we don't copy the bitmap, just remember the pointer
     SkBmpDecoderCallback(bool justBounds) : fJustBounds(justBounds) {}
     // override from BmpDecoderCallback
     virtual uint8* SetSize(int width, int height) {
         fWidth = width;
         fHeight = height;
         if (fJustBounds) {
             return NULL;
         }
         fRGB.setCount(width * height * 3);  // 3 == r, g, b
         return fRGB.begin();
     }
     int width() const { return fWidth; }
     int height() const { return fHeight; }
     const uint8_t* rgb() const { return fRGB.begin(); }
 private:
     SkTDArray<uint8_t> fRGB;
     int fWidth;
     int fHeight;
     bool fJustBounds;
 };
 bool SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
     // First read the entire stream, so that all of the data can be passed to
     // the BmpDecoderHelper.
     // Allocated space used to hold the data.
     SkAutoMalloc storage;
     // Byte length of all of the data.
     const size_t length = CopyStreamToStorage(&storage, stream);
     if (0 == length) {
         return 0;
     }
     const bool justBounds = SkImageDecoder::kDecodeBounds_Mode == mode;
     SkBmpDecoderCallback callback(justBounds);
     // Now decode the BMP into callback's rgb() array [r,g,b, r,g,b, ...]
     {
         image_codec::BmpDecoderHelper helper;
         const int max_pixels = 16383*16383; // max width*height
         if (!helper.DecodeImage((const char*)storage.get(), length,
                                 max_pixels, &callback)) {
             return false;
         }
     }
     // we don't need this anymore, so free it now (before we try to allocate
     // the bitmap's pixels) rather than waiting for its destructor
     storage.free();
     int width = callback.width();
     int height = callback.height();
     SkBitmap::Config config = this->getPrefConfig(k32Bit_SrcDepth, false);
     // only accept prefConfig if it makes sense for us
     if (SkBitmap::kARGB_4444_Config != config &&
             SkBitmap::kRGB_565_Config != config) {
         config = SkBitmap::kARGB_8888_Config;
     }
     SkScaledBitmapSampler sampler(width, height, getSampleSize());
     bm->setConfig(config, sampler.scaledWidth(), sampler.scaledHeight(), 0,
                   kOpaque_SkAlphaType);
     if (justBounds) {
         return true;
     }
     if (!this->allocPixelRef(bm, NULL)) {
         return false;
     }
     SkAutoLockPixels alp(*bm);
     if (!sampler.begin(bm, SkScaledBitmapSampler::kRGB, *this)) {
         return false;
     }
     const int srcRowBytes = width * 3;
     const int dstHeight = sampler.scaledHeight();
     const uint8_t* srcRow = callback.rgb();
     srcRow += sampler.srcY0() * srcRowBytes;
     for (int y = 0; y < dstHeight; y++) {
         sampler.next(srcRow);
         srcRow += sampler.srcDY() * srcRowBytes;
     }
     return true;
 }

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

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