The Tor Browser: gfx/skia/trunk/src/effects/SkLayerDrawLooper.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/effects/SkLayerDrawLooper.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/effects/SkLayerDrawLooper.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * 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 "SkCanvas.h"
 #include "SkColor.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkLayerDrawLooper.h"
 #include "SkString.h"
 #include "SkStringUtils.h"
 #include "SkUnPreMultiply.h"
 SkLayerDrawLooper::LayerInfo::LayerInfo() {
     fPaintBits = 0;                     // ignore our paint fields
     fColorMode = SkXfermode::kDst_Mode; // ignore our color
     fOffset.set(0, 0);
     fPostTranslate = false;
 }
 SkLayerDrawLooper::SkLayerDrawLooper()
         : fRecs(NULL),
           fTopRec(NULL),
           fCount(0) {
 }
 SkLayerDrawLooper::~SkLayerDrawLooper() {
     Rec* rec = fRecs;
     while (rec) {
         Rec* next = rec->fNext;
         SkDELETE(rec);
         rec = next;
     }
 }
 SkPaint* SkLayerDrawLooper::addLayer(const LayerInfo& info) {
     fCount += 1;
     Rec* rec = SkNEW(Rec);
     rec->fNext = fRecs;
     rec->fInfo = info;
     fRecs = rec;
     if (NULL == fTopRec) {
         fTopRec = rec;
     }
     return &rec->fPaint;
 }
 void SkLayerDrawLooper::addLayer(SkScalar dx, SkScalar dy) {
     LayerInfo info;
     info.fOffset.set(dx, dy);
     (void)this->addLayer(info);
 }
 SkPaint* SkLayerDrawLooper::addLayerOnTop(const LayerInfo& info) {
     fCount += 1;
     Rec* rec = SkNEW(Rec);
     rec->fNext = NULL;
     rec->fInfo = info;
     if (NULL == fRecs) {
         fRecs = rec;
     } else {
         SkASSERT(NULL != fTopRec);
         fTopRec->fNext = rec;
     }
     fTopRec = rec;
     return &rec->fPaint;
 }
 SkLayerDrawLooper::Context* SkLayerDrawLooper::createContext(SkCanvas* canvas, void* storage) const {
     canvas->save(SkCanvas::kMatrix_SaveFlag);
     return SkNEW_PLACEMENT_ARGS(storage, LayerDrawLooperContext, (this));
 }
 static SkColor xferColor(SkColor src, SkColor dst, SkXfermode::Mode mode) {
     switch (mode) {
         case SkXfermode::kSrc_Mode:
             return src;
         case SkXfermode::kDst_Mode:
             return dst;
         default: {
             SkPMColor pmS = SkPreMultiplyColor(src);
             SkPMColor pmD = SkPreMultiplyColor(dst);
             SkPMColor result = SkXfermode::GetProc(mode)(pmS, pmD);
             return SkUnPreMultiply::PMColorToColor(result);
         }
     }
 }
 // Even with kEntirePaint_Bits, we always ensure that the master paint's
 // text-encoding is respected, since that controls how we interpret the
 // text/length parameters of a draw[Pos]Text call.
 void SkLayerDrawLooper::LayerDrawLooperContext::ApplyInfo(
         SkPaint* dst, const SkPaint& src, const LayerInfo& info) {
     dst->setColor(xferColor(src.getColor(), dst->getColor(), info.fColorMode));
     BitFlags bits = info.fPaintBits;
     SkPaint::TextEncoding encoding = dst->getTextEncoding();
     if (0 == bits) {
         return;
     }
     if (kEntirePaint_Bits == bits) {
         // we've already computed these, so save it from the assignment
         uint32_t f = dst->getFlags();
         SkColor c = dst->getColor();
         *dst = src;
         dst->setFlags(f);
         dst->setColor(c);
         dst->setTextEncoding(encoding);
         return;
     }
     if (bits & kStyle_Bit) {
         dst->setStyle(src.getStyle());
         dst->setStrokeWidth(src.getStrokeWidth());
         dst->setStrokeMiter(src.getStrokeMiter());
         dst->setStrokeCap(src.getStrokeCap());
         dst->setStrokeJoin(src.getStrokeJoin());
     }
     if (bits & kTextSkewX_Bit) {
         dst->setTextSkewX(src.getTextSkewX());
     }
     if (bits & kPathEffect_Bit) {
         dst->setPathEffect(src.getPathEffect());
     }
     if (bits & kMaskFilter_Bit) {
         dst->setMaskFilter(src.getMaskFilter());
     }
     if (bits & kShader_Bit) {
         dst->setShader(src.getShader());
     }
     if (bits & kColorFilter_Bit) {
         dst->setColorFilter(src.getColorFilter());
     }
     if (bits & kXfermode_Bit) {
         dst->setXfermode(src.getXfermode());
     }
     // we don't override these
 #if 0
     dst->setTypeface(src.getTypeface());
     dst->setTextSize(src.getTextSize());
     dst->setTextScaleX(src.getTextScaleX());
     dst->setRasterizer(src.getRasterizer());
     dst->setLooper(src.getLooper());
     dst->setTextEncoding(src.getTextEncoding());
     dst->setHinting(src.getHinting());
 #endif
 }
 // Should we add this to canvas?
 static void postTranslate(SkCanvas* canvas, SkScalar dx, SkScalar dy) {
     SkMatrix m = canvas->getTotalMatrix();
     m.postTranslate(dx, dy);
     canvas->setMatrix(m);
 }
 SkLayerDrawLooper::LayerDrawLooperContext::LayerDrawLooperContext(
         const SkLayerDrawLooper* looper) : fCurrRec(looper->fRecs) {}
 bool SkLayerDrawLooper::LayerDrawLooperContext::next(SkCanvas* canvas,
                                                      SkPaint* paint) {
     canvas->restore();
     if (NULL == fCurrRec) {
         return false;
     }
     ApplyInfo(paint, fCurrRec->fPaint, fCurrRec->fInfo);
     canvas->save(SkCanvas::kMatrix_SaveFlag);
     if (fCurrRec->fInfo.fPostTranslate) {
         postTranslate(canvas, fCurrRec->fInfo.fOffset.fX,
                       fCurrRec->fInfo.fOffset.fY);
     } else {
         canvas->translate(fCurrRec->fInfo.fOffset.fX,
                           fCurrRec->fInfo.fOffset.fY);
     }
     fCurrRec = fCurrRec->fNext;
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkLayerDrawLooper::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
 #ifdef SK_DEBUG
     {
         Rec* rec = fRecs;
         int count = 0;
         while (rec) {
             rec = rec->fNext;
             count += 1;
         }
         SkASSERT(count == fCount);
     }
 #endif
     buffer.writeInt(fCount);
     Rec* rec = fRecs;
     for (int i = 0; i < fCount; i++) {
         // Legacy "flagsmask" field -- now ignored, remove when we bump version
         buffer.writeInt(0);
         buffer.writeInt(rec->fInfo.fPaintBits);
         buffer.writeInt(rec->fInfo.fColorMode);
         buffer.writePoint(rec->fInfo.fOffset);
         buffer.writeBool(rec->fInfo.fPostTranslate);
         buffer.writePaint(rec->fPaint);
         rec = rec->fNext;
     }
 }
 SkFlattenable* SkLayerDrawLooper::CreateProc(SkReadBuffer& buffer) {
     int count = buffer.readInt();
     Builder builder;
     for (int i = 0; i < count; i++) {
         LayerInfo info;
         // Legacy "flagsmask" field -- now ignored, remove when we bump version
         (void)buffer.readInt();
         info.fPaintBits = buffer.readInt();
         info.fColorMode = (SkXfermode::Mode)buffer.readInt();
         buffer.readPoint(&info.fOffset);
         info.fPostTranslate = buffer.readBool();
         buffer.readPaint(builder.addLayerOnTop(info));
     }
     SkLayerDrawLooper* looper = builder.detachLooper();
     SkASSERT(count == looper->fCount);
 #ifdef SK_DEBUG
     {
         Rec* rec = looper->fRecs;
         int n = 0;
         while (rec) {
             rec = rec->fNext;
             n += 1;
         }
         SkASSERT(count == n);
     }
 #endif
     return looper;
 }
 #ifndef SK_IGNORE_TO_STRING
 void SkLayerDrawLooper::toString(SkString* str) const {
     str->appendf("SkLayerDrawLooper (%d): ", fCount);
     Rec* rec = fRecs;
     for (int i = 0; i < fCount; i++) {
         str->appendf("%d: paintBits: (", i);
         if (0 == rec->fInfo.fPaintBits) {
             str->append("None");
         } else if (kEntirePaint_Bits == rec->fInfo.fPaintBits) {
             str->append("EntirePaint");
         } else {
             bool needSeparator = false;
             SkAddFlagToString(str, SkToBool(kStyle_Bit & rec->fInfo.fPaintBits), "Style",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kTextSkewX_Bit & rec->fInfo.fPaintBits), "TextSkewX",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kPathEffect_Bit & rec->fInfo.fPaintBits), "PathEffect",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kMaskFilter_Bit & rec->fInfo.fPaintBits), "MaskFilter",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kShader_Bit & rec->fInfo.fPaintBits), "Shader",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kColorFilter_Bit & rec->fInfo.fPaintBits), "ColorFilter",
                               &needSeparator);
             SkAddFlagToString(str, SkToBool(kXfermode_Bit & rec->fInfo.fPaintBits), "Xfermode",
                               &needSeparator);
         }
         str->append(") ");
         static const char* gModeStrings[SkXfermode::kLastMode+1] = {
             "kClear", "kSrc", "kDst", "kSrcOver", "kDstOver", "kSrcIn", "kDstIn",
             "kSrcOut", "kDstOut", "kSrcATop", "kDstATop", "kXor", "kPlus",
             "kMultiply", "kScreen", "kOverlay", "kDarken", "kLighten", "kColorDodge",
             "kColorBurn", "kHardLight", "kSoftLight", "kDifference", "kExclusion"
         };
         str->appendf("mode: %s ", gModeStrings[rec->fInfo.fColorMode]);
         str->append("offset: (");
         str->appendScalar(rec->fInfo.fOffset.fX);
         str->append(", ");
         str->appendScalar(rec->fInfo.fOffset.fY);
         str->append(") ");
         str->append("postTranslate: ");
         if (rec->fInfo.fPostTranslate) {
             str->append("true ");
         } else {
             str->append("false ");
         }
         rec->fPaint.toString(str);
         rec = rec->fNext;
     }
 }
 #endif
 SkLayerDrawLooper::Builder::Builder()
         : fRecs(NULL),
           fTopRec(NULL),
           fCount(0) {
 }
 SkLayerDrawLooper::Builder::~Builder() {
     Rec* rec = fRecs;
     while (rec) {
         Rec* next = rec->fNext;
         SkDELETE(rec);
         rec = next;
     }
 }
 SkPaint* SkLayerDrawLooper::Builder::addLayer(const LayerInfo& info) {
     fCount += 1;
     Rec* rec = SkNEW(Rec);
     rec->fNext = fRecs;
     rec->fInfo = info;
     fRecs = rec;
     if (NULL == fTopRec) {
         fTopRec = rec;
     }
     return &rec->fPaint;
 }
 void SkLayerDrawLooper::Builder::addLayer(SkScalar dx, SkScalar dy) {
     LayerInfo info;
     info.fOffset.set(dx, dy);
     (void)this->addLayer(info);
 }
 SkPaint* SkLayerDrawLooper::Builder::addLayerOnTop(const LayerInfo& info) {
     fCount += 1;
     Rec* rec = SkNEW(Rec);
     rec->fNext = NULL;
     rec->fInfo = info;
     if (NULL == fRecs) {
         fRecs = rec;
     } else {
         SkASSERT(NULL != fTopRec);
         fTopRec->fNext = rec;
     }
     fTopRec = rec;
     return &rec->fPaint;
 }
 SkLayerDrawLooper* SkLayerDrawLooper::Builder::detachLooper() {
     SkLayerDrawLooper* looper = SkNEW(SkLayerDrawLooper);
     looper->fCount = fCount;
     looper->fRecs = fRecs;
     fCount = 0;
     fRecs = NULL;
     fTopRec = NULL;
     return looper;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/effects/SkLayerDrawLooper.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/effects/SkLayerDrawLooper.cpp