| /* libs/graphics/svg/SkSVGPaintState.cpp |
| ** |
| ** Copyright 2006, The Android Open Source Project |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| #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; |
| } |
| |
