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

gfx/skia/trunk/src/pdf/SkPDFGraphicState.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFGraphicState.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 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkPDFFormXObject.h"
 #include "SkPDFGraphicState.h"
 #include "SkPDFUtils.h"
 #include "SkStream.h"
 #include "SkTypes.h"
 static const char* blend_mode_from_xfermode(SkXfermode::Mode mode) {
     switch (mode) {
         case SkXfermode::kSrcOver_Mode:    return "Normal";
         case SkXfermode::kMultiply_Mode:   return "Multiply";
         case SkXfermode::kScreen_Mode:     return "Screen";
         case SkXfermode::kOverlay_Mode:    return "Overlay";
         case SkXfermode::kDarken_Mode:     return "Darken";
         case SkXfermode::kLighten_Mode:    return "Lighten";
         case SkXfermode::kColorDodge_Mode: return "ColorDodge";
         case SkXfermode::kColorBurn_Mode:  return "ColorBurn";
         case SkXfermode::kHardLight_Mode:  return "HardLight";
         case SkXfermode::kSoftLight_Mode:  return "SoftLight";
         case SkXfermode::kDifference_Mode: return "Difference";
         case SkXfermode::kExclusion_Mode:  return "Exclusion";
         case SkXfermode::kHue_Mode:        return "Hue";
         case SkXfermode::kSaturation_Mode: return "Saturation";
         case SkXfermode::kColor_Mode:      return "Color";
         case SkXfermode::kLuminosity_Mode: return "Luminosity";
         // These are handled in SkPDFDevice::setUpContentEntry.
         case SkXfermode::kClear_Mode:
         case SkXfermode::kSrc_Mode:
         case SkXfermode::kDst_Mode:
         case SkXfermode::kDstOver_Mode:
         case SkXfermode::kSrcIn_Mode:
         case SkXfermode::kDstIn_Mode:
         case SkXfermode::kSrcOut_Mode:
         case SkXfermode::kDstOut_Mode:
         case SkXfermode::kSrcATop_Mode:
         case SkXfermode::kDstATop_Mode:
         case SkXfermode::kModulate_Mode:
             return "Normal";
         // TODO(vandebo): Figure out if we can support more of these modes.
         case SkXfermode::kXor_Mode:
         case SkXfermode::kPlus_Mode:
             return NULL;
     }
     return NULL;
 }
 SkPDFGraphicState::~SkPDFGraphicState() {
     SkAutoMutexAcquire lock(CanonicalPaintsMutex());
     if (!fSMask) {
         int index = Find(fPaint);
         SkASSERT(index >= 0);
         SkASSERT(CanonicalPaints()[index].fGraphicState == this);
         CanonicalPaints().removeShuffle(index);
     }
     fResources.unrefAll();
 }
 void SkPDFGraphicState::getResources(
         const SkTSet<SkPDFObject*>& knownResourceObjects,
         SkTSet<SkPDFObject*>* newResourceObjects) {
     GetResourcesHelper(&fResources, knownResourceObjects, newResourceObjects);
 }
 void SkPDFGraphicState::emitObject(SkWStream* stream, SkPDFCatalog* catalog,
                                    bool indirect) {
     populateDict();
     SkPDFDict::emitObject(stream, catalog, indirect);
 }
 // static
 size_t SkPDFGraphicState::getOutputSize(SkPDFCatalog* catalog, bool indirect) {
     populateDict();
     return SkPDFDict::getOutputSize(catalog, indirect);
 }
 // static
 SkTDArray<SkPDFGraphicState::GSCanonicalEntry>&
 SkPDFGraphicState::CanonicalPaints() {
     // This initialization is only thread safe with gcc.
     static SkTDArray<SkPDFGraphicState::GSCanonicalEntry> gCanonicalPaints;
     return gCanonicalPaints;
 }
 // static
 SkBaseMutex& SkPDFGraphicState::CanonicalPaintsMutex() {
     // This initialization is only thread safe with gcc or when
     // POD-style mutex initialization is used.
     SK_DECLARE_STATIC_MUTEX(gCanonicalPaintsMutex);
     return gCanonicalPaintsMutex;
 }
 // static
 SkPDFGraphicState* SkPDFGraphicState::GetGraphicStateForPaint(
         const SkPaint& paint) {
     SkAutoMutexAcquire lock(CanonicalPaintsMutex());
     int index = Find(paint);
     if (index >= 0) {
         CanonicalPaints()[index].fGraphicState->ref();
         return CanonicalPaints()[index].fGraphicState;
     }
     GSCanonicalEntry newEntry(new SkPDFGraphicState(paint));
     CanonicalPaints().push(newEntry);
     return newEntry.fGraphicState;
 }
 // static
 SkPDFObject* SkPDFGraphicState::GetInvertFunction() {
     // This assumes that canonicalPaintsMutex is held.
     static SkPDFStream* invertFunction = NULL;
     if (!invertFunction) {
         // Acrobat crashes if we use a type 0 function, kpdf crashes if we use
         // a type 2 function, so we use a type 4 function.
         SkAutoTUnref<SkPDFArray> domainAndRange(new SkPDFArray);
         domainAndRange->reserve(2);
         domainAndRange->appendInt(0);
         domainAndRange->appendInt(1);
         static const char psInvert[] = "{1 exch sub}";
         SkAutoTUnref<SkMemoryStream> psInvertStream(
             new SkMemoryStream(&psInvert, strlen(psInvert), true));
         invertFunction = new SkPDFStream(psInvertStream.get());
         invertFunction->insertInt("FunctionType", 4);
         invertFunction->insert("Domain", domainAndRange.get());
         invertFunction->insert("Range", domainAndRange.get());
     }
     return invertFunction;
 }
 // static
 SkPDFGraphicState* SkPDFGraphicState::GetSMaskGraphicState(
         SkPDFFormXObject* sMask, bool invert, SkPDFSMaskMode sMaskMode) {
     // The practical chances of using the same mask more than once are unlikely
     // enough that it's not worth canonicalizing.
     SkAutoMutexAcquire lock(CanonicalPaintsMutex());
     SkAutoTUnref<SkPDFDict> sMaskDict(new SkPDFDict("Mask"));
     if (sMaskMode == kAlpha_SMaskMode) {
         sMaskDict->insertName("S", "Alpha");
     } else if (sMaskMode == kLuminosity_SMaskMode) {
         sMaskDict->insertName("S", "Luminosity");
     }
     sMaskDict->insert("G", new SkPDFObjRef(sMask))->unref();
     SkPDFGraphicState* result = new SkPDFGraphicState;
     result->fPopulated = true;
     result->fSMask = true;
     result->insertName("Type", "ExtGState");
     result->insert("SMask", sMaskDict.get());
     result->fResources.push(sMask);
     sMask->ref();
     if (invert) {
         SkPDFObject* invertFunction = GetInvertFunction();
         result->fResources.push(invertFunction);
         invertFunction->ref();
         sMaskDict->insert("TR", new SkPDFObjRef(invertFunction))->unref();
     }
     return result;
 }
 // static
 SkPDFGraphicState* SkPDFGraphicState::GetNoSMaskGraphicState() {
     SkAutoMutexAcquire lock(CanonicalPaintsMutex());
     static SkPDFGraphicState* noSMaskGS = NULL;
     if (!noSMaskGS) {
         noSMaskGS = new SkPDFGraphicState;
         noSMaskGS->fPopulated = true;
         noSMaskGS->fSMask = true;
         noSMaskGS->insertName("Type", "ExtGState");
         noSMaskGS->insertName("SMask", "None");
     }
     noSMaskGS->ref();
     return noSMaskGS;
 }
 // static
 int SkPDFGraphicState::Find(const SkPaint& paint) {
     GSCanonicalEntry search(&paint);
     return CanonicalPaints().find(search);
 }
 SkPDFGraphicState::SkPDFGraphicState()
     : fPopulated(false),
       fSMask(false) {
 }
 SkPDFGraphicState::SkPDFGraphicState(const SkPaint& paint)
     : fPaint(paint),
       fPopulated(false),
       fSMask(false) {
 }
 // populateDict and operator== have to stay in sync with each other.
 void SkPDFGraphicState::populateDict() {
     if (!fPopulated) {
         fPopulated = true;
         insertName("Type", "ExtGState");
         SkAutoTUnref<SkPDFScalar> alpha(
             new SkPDFScalar(SkScalarDiv(fPaint.getAlpha(), 0xFF)));
         insert("CA", alpha.get());
         insert("ca", alpha.get());
         SK_COMPILE_ASSERT(SkPaint::kButt_Cap == 0, paint_cap_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kRound_Cap == 1, paint_cap_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kSquare_Cap == 2, paint_cap_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kCapCount == 3, paint_cap_mismatch);
         SkASSERT(fPaint.getStrokeCap() >= 0 && fPaint.getStrokeCap() <= 2);
         insertInt("LC", fPaint.getStrokeCap());
         SK_COMPILE_ASSERT(SkPaint::kMiter_Join == 0, paint_join_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kRound_Join == 1, paint_join_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kBevel_Join == 2, paint_join_mismatch);
         SK_COMPILE_ASSERT(SkPaint::kJoinCount == 3, paint_join_mismatch);
         SkASSERT(fPaint.getStrokeJoin() >= 0 && fPaint.getStrokeJoin() <= 2);
         insertInt("LJ", fPaint.getStrokeJoin());
         insertScalar("LW", fPaint.getStrokeWidth());
         insertScalar("ML", fPaint.getStrokeMiter());
         insert("SA", new SkPDFBool(true))->unref();  // Auto stroke adjustment.
         SkXfermode::Mode xfermode = SkXfermode::kSrcOver_Mode;
         // If asMode fails, default to kSrcOver_Mode.
         if (fPaint.getXfermode())
             fPaint.getXfermode()->asMode(&xfermode);
         // If we don't support the mode, just use kSrcOver_Mode.
         if (xfermode < 0 || xfermode > SkXfermode::kLastMode ||
                 blend_mode_from_xfermode(xfermode) == NULL) {
             xfermode = SkXfermode::kSrcOver_Mode;
             NOT_IMPLEMENTED("unsupported xfermode", false);
         }
         insertName("BM", blend_mode_from_xfermode(xfermode));
     }
 }
 // We're only interested in some fields of the SkPaint, so we have a custom
 // operator== function.
 bool SkPDFGraphicState::GSCanonicalEntry::operator==(
         const SkPDFGraphicState::GSCanonicalEntry& gs) const {
     const SkPaint* a = fPaint;
     const SkPaint* b = gs.fPaint;
     SkASSERT(a != NULL);
     SkASSERT(b != NULL);
     if (SkColorGetA(a->getColor()) != SkColorGetA(b->getColor()) ||
            a->getStrokeCap() != b->getStrokeCap() ||
            a->getStrokeJoin() != b->getStrokeJoin() ||
            a->getStrokeWidth() != b->getStrokeWidth() ||
            a->getStrokeMiter() != b->getStrokeMiter()) {
         return false;
     }
     SkXfermode::Mode aXfermodeName = SkXfermode::kSrcOver_Mode;
     SkXfermode* aXfermode = a->getXfermode();
     if (aXfermode) {
         aXfermode->asMode(&aXfermodeName);
     }
     if (aXfermodeName < 0 || aXfermodeName > SkXfermode::kLastMode ||
             blend_mode_from_xfermode(aXfermodeName) == NULL) {
         aXfermodeName = SkXfermode::kSrcOver_Mode;
     }
     const char* aXfermodeString = blend_mode_from_xfermode(aXfermodeName);
     SkASSERT(aXfermodeString != NULL);
     SkXfermode::Mode bXfermodeName = SkXfermode::kSrcOver_Mode;
     SkXfermode* bXfermode = b->getXfermode();
     if (bXfermode) {
         bXfermode->asMode(&bXfermodeName);
     }
     if (bXfermodeName < 0 || bXfermodeName > SkXfermode::kLastMode ||
             blend_mode_from_xfermode(bXfermodeName) == NULL) {
         bXfermodeName = SkXfermode::kSrcOver_Mode;
     }
     const char* bXfermodeString = blend_mode_from_xfermode(bXfermodeName);
     SkASSERT(bXfermodeString != NULL);
     return strcmp(aXfermodeString, bXfermodeString) == 0;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/pdf/SkPDFGraphicState.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFGraphicState.cpp