The Tor Browser: gfx/skia/trunk/src/svg/SkSVGPaintState.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/svg/SkSVGPaintState.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/svg/SkSVGPaintState.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * 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 "SkSVGPaintState.h"
 #include "SkSVGElements.h"
 #include "SkSVGParser.h"
 #include "SkParse.h"
 SkSVGAttribute SkSVGPaint::gAttributes[] = {
     SVG_LITERAL_ATTRIBUTE(clip-path, f_clipPath),
     SVG_LITERAL_ATTRIBUTE(clip-rule, f_clipRule),
     SVG_LITERAL_ATTRIBUTE(enable-background, f_enableBackground),
     SVG_ATTRIBUTE(fill),
     SVG_LITERAL_ATTRIBUTE(fill-rule, f_fillRule),
     SVG_ATTRIBUTE(filter),
     SVG_LITERAL_ATTRIBUTE(font-family, f_fontFamily),
     SVG_LITERAL_ATTRIBUTE(font-size, f_fontSize),
     SVG_LITERAL_ATTRIBUTE(letter-spacing, f_letterSpacing),
     SVG_ATTRIBUTE(mask),
     SVG_ATTRIBUTE(opacity),
     SVG_LITERAL_ATTRIBUTE(stop-color, f_stopColor),
     SVG_LITERAL_ATTRIBUTE(stop-opacity, f_stopOpacity),
     SVG_ATTRIBUTE(stroke),
     SVG_LITERAL_ATTRIBUTE(stroke-dasharray, f_strokeDasharray),
     SVG_LITERAL_ATTRIBUTE(stroke-linecap, f_strokeLinecap),
     SVG_LITERAL_ATTRIBUTE(stroke-linejoin, f_strokeLinejoin),
     SVG_LITERAL_ATTRIBUTE(stroke-miterlimit, f_strokeMiterlimit),
     SVG_LITERAL_ATTRIBUTE(stroke-width, f_strokeWidth),
     SVG_ATTRIBUTE(style),
     SVG_ATTRIBUTE(transform)
 };
 const int SkSVGPaint::kAttributesSize = SK_ARRAY_COUNT(SkSVGPaint::gAttributes);
 SkSVGPaint::SkSVGPaint() : fNext(NULL) {
 }
 SkString* SkSVGPaint::operator[](int index) {
     SkASSERT(index >= 0);
     SkASSERT(index < &fTerminal - &fInitial);
     SkASSERT(&fTerminal - &fInitial == kTerminal - kInitial);
     SkString* result = &fInitial + index + 1;
     return result;
 }
 void SkSVGPaint::addAttribute(SkSVGParser& parser, int attrIndex,
         const char* attrValue, size_t attrLength) {
     SkString* attr = (*this)[attrIndex];
     switch(attrIndex) {
         case kClipPath:
         case kClipRule:
         case kEnableBackground:
         case kFill:
         case kFillRule:
         case kFilter:
         case kFontFamily:
         case kFontSize:
         case kLetterSpacing:
         case kMask:
         case kOpacity:
         case kStopColor:
         case kStopOpacity:
         case kStroke:
         case kStroke_Dasharray:
         case kStroke_Linecap:
         case kStroke_Linejoin:
         case kStroke_Miterlimit:
         case kStroke_Width:
         case kTransform:
             attr->set(attrValue, attrLength);
             return;
         case kStyle: {
             // iterate through colon / semi-colon delimited pairs
             int pairs = SkParse::Count(attrValue, ';');
             const char* attrEnd = attrValue + attrLength;
             do {
                 const char* end = strchr(attrValue, ';');
                 if (end == NULL)
                     end = attrEnd;
                 const char* delimiter = strchr(attrValue, ':');
                 SkASSERT(delimiter != 0 && delimiter < end);
                 int index = parser.findAttribute(this, attrValue, (int) (delimiter - attrValue), true);
                 SkASSERT(index >= 0);
                 delimiter++;
                 addAttribute(parser, index, delimiter, (int) (end - delimiter));
                 attrValue = end + 1;
             } while (--pairs);
             return;
             }
         default:
             SkASSERT(0);
     }
 }
 bool SkSVGPaint::flush(SkSVGParser& parser, bool isFlushable, bool isDef) {
     SkSVGPaint current;
     SkSVGPaint* walking = parser.fHead;
     int index;
     while (walking != NULL) {
         for (index = kInitial + 1; index < kTerminal; index++) {
             SkString* lastAttr = (*walking)[index];
             if (lastAttr->size() == 0)
                 continue;
             if (current[index]->size() > 0)
                 continue;
             current[index]->set(*lastAttr);
         }
         walking = walking->fNext;
     }
     bool paintChanged = false;
     SkSVGPaint& lastState = parser.fLastFlush;
     if (isFlushable == false) {
         if (isDef == true) {
             if (current.f_mask.size() > 0 && current.f_mask.equals(lastState.f_mask) == false) {
                 SkSVGElement* found;
                 const char* idStart = strchr(current.f_mask.c_str(), '#');
                 SkASSERT(idStart);
                 SkString id(idStart + 1, strlen(idStart) - 2);
                 bool itsFound = parser.fIDs.find(id.c_str(), &found);
                 SkASSERT(itsFound);
                 SkSVGElement* gradient = found->getGradient();
                 if (gradient) {
                     gradient->write(parser, current.f_fill);
                     gradient->write(parser, current.f_stroke);
                 }
             }
         }
         goto setLast;
     }
     {
         bool changed[kTerminal];
         memset(changed, 0, sizeof(changed));
         for (index = kInitial + 1; index < kTerminal; index++) {
             if (index == kTransform || index == kClipPath || index == kStopColor || index == kStopOpacity ||
                     index == kClipRule || index == kFillRule)
                 continue;
             SkString* lastAttr = lastState[index];
             SkString* currentAttr = current[index];
             paintChanged |= changed[index] = lastAttr->equals(*currentAttr) == false;
         }
         if (paintChanged) {
             if (current.f_mask.size() > 0) {
                 if (current.f_fill.equals("none") == false && strncmp(current.f_fill.c_str(), "url(#", 5) != 0) {
                     SkASSERT(current.f_fill.c_str()[0] == '#');
                     SkString replacement("url(#mask");
                     replacement.append(current.f_fill.c_str() + 1);
                     replacement.appendUnichar(')');
                     current.f_fill.set(replacement);
                 }
                 if (current.f_stroke.equals("none") == false && strncmp(current.f_stroke.c_str(), "url(#", 5) != 0) {
                     SkASSERT(current.f_stroke.c_str()[0] == '#');
                     SkString replacement("url(#mask");
                     replacement.append(current.f_stroke.c_str() + 1);
                     replacement.appendUnichar(')');
                     current.f_stroke.set(replacement);
                 }
             }
             if (current.f_fill.equals("none") && current.f_stroke.equals("none"))
                 current.f_opacity.set("0");
             if (parser.fSuppressPaint == false) {
                 parser._startElement("paint");
                 bool success = writeChangedAttributes(parser, current, changed);
                 if (success == false)
                     return paintChanged;
                 success = writeChangedElements(parser, current, changed);
                 if (success == false)
                     return paintChanged;
                 parser._endElement(); // paint
             }
         }
     }
 setLast:
     for (index = kInitial + 1; index < kTerminal; index++) {
         SkString* lastAttr = lastState[index];
         SkString* currentAttr = current[index];
         lastAttr->set(*currentAttr);
     }
     return paintChanged;
 }
 int SkSVGPaint::getAttributes(const SkSVGAttribute** attrPtr) {
     *attrPtr = gAttributes;
     return kAttributesSize;
 }
 void SkSVGPaint::setSave(SkSVGParser& parser) {
     SkTDArray<SkString*> clips;
     SkSVGPaint* walking = parser.fHead;
     int index;
     SkMatrix sum;
     sum.reset();
     while (walking != NULL) {
         for (index = kInitial + 1; index < kTerminal; index++) {
             SkString* lastAttr = (*walking)[index];
             if (lastAttr->size() == 0)
                 continue;
             if (index == kTransform) {
                 const char* str = lastAttr->c_str();
                 SkASSERT(strncmp(str, "matrix(", 7) == 0);
                 str += 6;
                 const char* strEnd = strrchr(str, ')');
                 SkASSERT(strEnd != NULL);
                 SkString mat(str, strEnd - str);
                 SkSVGParser::ConvertToArray(mat);
                 SkScalar values[6];
                 SkParse::FindScalars(mat.c_str() + 1, values, 6);
                 SkMatrix matrix;
                 matrix.reset();
                 matrix.setScaleX(values[0]);
                 matrix.setSkewY(values[1]);
                 matrix.setSkewX(values[2]);
                 matrix.setScaleY(values[3]);
                 matrix.setTranslateX(values[4]);
                 matrix.setTranslateY(values[5]);
                 sum.setConcat(matrix, sum);
                 continue;
             }
             if ( index == kClipPath)
                 *clips.insert(0) = lastAttr;
         }
         walking = walking->fNext;
     }
     if ((sum == parser.fLastTransform) == false) {
         SkMatrix inverse;
         bool success = parser.fLastTransform.invert(&inverse);
         SkASSERT(success == true);
         SkMatrix output;
         output.setConcat(inverse, sum);
         parser.fLastTransform = sum;
         SkString outputStr;
         outputStr.appendUnichar('[');
         outputStr.appendScalar(output.getScaleX());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getSkewX());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getTranslateX());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getSkewY());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getScaleY());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getTranslateY());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getPerspX());
         outputStr.appendUnichar(',');
         outputStr.appendScalar(output.getPerspY());
         outputStr.append(",1]");
         parser._startElement("matrix");
         parser._addAttributeLen("matrix", outputStr.c_str(), outputStr.size());
         parser._endElement();
     }
 #if 0   // incomplete
     if (parser.fTransformClips.size() > 0) {
         // need to reset the clip when the 'g' scope is ended
         parser._startElement("add");
         const char* start = strchr(current->f_clipPath.c_str(), '#') + 1;
         SkASSERT(start);
         parser._addAttributeLen("use", start, strlen(start) - 1);
         parser._endElement();   // clip
     }
 #endif
 }
 bool SkSVGPaint::writeChangedAttributes(SkSVGParser& parser,
         SkSVGPaint& current, bool* changed) {
     SkSVGPaint& lastState = parser.fLastFlush;
     for (int index = kInitial + 1; index < kTerminal; index++) {
         if (changed[index] == false)
                 continue;
         SkString* topAttr = current[index];
         size_t attrLength = topAttr->size();
         if (attrLength == 0)
             continue;
         const char* attrValue = topAttr->c_str();
         SkString* lastAttr = lastState[index];
         switch(index) {
             case kClipPath:
             case kClipRule:
             case kEnableBackground:
                 break;
             case kFill:
                 if (topAttr->equals("none") == false && lastAttr->equals("none") == true)
                     parser._addAttribute("stroke", "false");
                 goto fillStrokeAttrCommon;
             case kFillRule:
             case kFilter:
             case kFontFamily:
                 break;
             case kFontSize:
                 parser._addAttributeLen("textSize", attrValue, attrLength);
                 break;
             case kLetterSpacing:
                 parser._addAttributeLen("textTracking", attrValue, attrLength);
                 break;
             case kMask:
                 break;
             case kOpacity:
                 break;
             case kStopColor:
                 break;
             case kStopOpacity:
                 break;
             case kStroke:
                 if (topAttr->equals("none") == false && lastAttr->equals("none") == true)
                     parser._addAttribute("stroke", "true");
 fillStrokeAttrCommon:
                 if (strncmp(attrValue, "url(", 4) == 0) {
                     SkASSERT(attrValue[4] == '#');
                     const char* idStart = attrValue + 5;
                     const char* idEnd = strrchr(attrValue, ')');
                     SkASSERT(idStart < idEnd);
                     SkString id(idStart, idEnd - idStart);
                     SkSVGElement* found;
                     if (strncmp(id.c_str(), "mask", 4) != 0) {
                         bool itsFound = parser.fIDs.find(id.c_str(), &found);
                         SkASSERT(itsFound);
                         SkASSERT(found->getType() == SkSVGType_LinearGradient ||
                             found->getType() == SkSVGType_RadialGradient);
                     }
                     parser._addAttribute("shader", id.c_str());
                 }
                 break;
             case kStroke_Dasharray:
                 break;
             case kStroke_Linecap:
                 parser._addAttributeLen("strokeCap", attrValue, attrLength);
                 break;
             case kStroke_Linejoin:
                 parser._addAttributeLen("strokeJoin", attrValue, attrLength);
                 break;
             case kStroke_Miterlimit:
                 parser._addAttributeLen("strokeMiter", attrValue, attrLength);
                 break;
             case kStroke_Width:
                 parser._addAttributeLen("strokeWidth", attrValue, attrLength);
             case kStyle:
             case kTransform:
                 break;
         default:
             SkASSERT(0);
             return false;
         }
     }
     return true;
 }
 bool SkSVGPaint::writeChangedElements(SkSVGParser& parser,
         SkSVGPaint& current, bool* changed) {
     SkSVGPaint& lastState = parser.fLastFlush;
     for (int index = kInitial + 1; index < kTerminal; index++) {
         SkString* topAttr = current[index];
         size_t attrLength = topAttr->size();
         if (attrLength == 0)
             continue;
         const char* attrValue = topAttr->c_str();
         SkString* lastAttr = lastState[index];
         switch(index) {
             case kClipPath:
             case kClipRule:
                 // !!! need to add this outside of paint
                 break;
             case kEnableBackground:
                 // !!! don't know what to do with this
                 break;
             case kFill:
                 goto addColor;
             case kFillRule:
             case kFilter:
                 break;
             case kFontFamily:
                 parser._startElement("typeface");
                 parser._addAttributeLen("fontName", attrValue, attrLength);
                 parser._endElement();   // typeface
                 break;
             case kFontSize:
             case kLetterSpacing:
                 break;
             case kMask:
             case kOpacity:
                 if (changed[kStroke] == false && changed[kFill] == false) {
                     parser._startElement("color");
                     SkString& opacity = current.f_opacity;
                     parser._addAttributeLen("color", parser.fLastColor.c_str(), parser.fLastColor.size());
                     parser._addAttributeLen("alpha", opacity.c_str(), opacity.size());
                     parser._endElement();   // color
                 }
                 break;
             case kStopColor:
                 break;
             case kStopOpacity:
                 break;
             case kStroke:
 addColor:
                 if (strncmp(lastAttr->c_str(), "url(", 4) == 0 && strncmp(attrValue, "url(", 4) != 0) {
                     parser._startElement("shader");
                     parser._endElement();
                 }
                 if (topAttr->equals(*lastAttr))
                     continue;
                 {
                     bool urlRef = strncmp(attrValue, "url(", 4) == 0;
                     bool colorNone = strcmp(attrValue, "none") == 0;
                     bool lastEqual = parser.fLastColor.equals(attrValue, attrLength);
                     bool newColor = urlRef == false && colorNone == false && lastEqual == false;
                     if (newColor || changed[kOpacity]) {
                         parser._startElement("color");
                         if (newColor || changed[kOpacity]) {
                             parser._addAttributeLen("color", attrValue, attrLength);
                             parser.fLastColor.set(attrValue, attrLength);
                         }
                         if (changed[kOpacity]) {
                             SkString& opacity = current.f_opacity;
                             parser._addAttributeLen("alpha", opacity.c_str(), opacity.size());
                         }
                         parser._endElement();   // color
                     }
                 }
                 break;
             case kStroke_Dasharray:
                 parser._startElement("dash");
                 SkSVGParser::ConvertToArray(*topAttr);
                 parser._addAttribute("intervals", topAttr->c_str());
                 parser._endElement();   // dash
             break;
             case kStroke_Linecap:
             case kStroke_Linejoin:
             case kStroke_Miterlimit:
             case kStroke_Width:
             case kStyle:
             case kTransform:
                 break;
         default:
             SkASSERT(0);
             return false;
         }
     }
     return true;
 }
 void SkSVGPaint::Push(SkSVGPaint** head, SkSVGPaint* newRecord) {
     newRecord->fNext = *head;
     *head = newRecord;
 }
 void SkSVGPaint::Pop(SkSVGPaint** head) {
     SkSVGPaint* next = (*head)->fNext;
     *head = next;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/svg/SkSVGPaintState.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/svg/SkSVGPaintState.cpp