| /* libs/graphics/svg/SkSVGGradient.cpp |
| ** |
| ** Copyright 2006, Google Inc. |
| ** |
| ** 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 "SkSVGGradient.h" |
| #include "SkSVGParser.h" |
| #include "SkSVGStop.h" |
| |
| SkSVGGradient::SkSVGGradient() { |
| } |
| |
| SkSVGElement* SkSVGGradient::getGradient() { |
| return this; |
| } |
| |
| bool SkSVGGradient::isDef() { |
| return true; |
| } |
| |
| bool SkSVGGradient::isNotDef() { |
| return false; |
| } |
| |
| void SkSVGGradient::translate(SkSVGParser& parser, bool defState) { |
| INHERITED::translate(parser, defState); |
| // !!! no support for 'objectBoundingBox' yet |
| bool first = true; |
| bool addedFirst = false; |
| bool addedLast = false; |
| SkString offsets("["); |
| SkString* lastOffset = nil; |
| for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { |
| SkASSERT((*ptr)->getType() == SkSVGType_Stop); |
| SkSVGStop* stop = (SkSVGStop*) *ptr; |
| if (first && stop->f_offset.equals("0") == false) { |
| addedFirst = true; |
| offsets.append("0,"); |
| } |
| SkString* thisOffset = &stop->f_offset; |
| if (lastOffset && thisOffset->equals(*lastOffset)) { |
| if (thisOffset->equals("1")) { |
| offsets.remove(offsets.size() - 2, 2); |
| offsets.append(".999,"); |
| } else { |
| SkASSERT(0); // !!! need to write this case |
| } |
| } |
| offsets.append(*thisOffset); |
| if (ptr == fChildren.end() - 1) { // last |
| if (stop->f_offset.equals("1") == false) { |
| offsets.append(",1"); |
| addedLast = true; |
| } |
| } else |
| offsets.appendUnichar(','); |
| first = false; |
| lastOffset = thisOffset; |
| } |
| offsets.appendUnichar(']'); |
| parser._addAttribute("offsets", offsets); |
| if (addedFirst) |
| parser.translate(*fChildren.begin(), defState); |
| for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) |
| parser.translate(*ptr, defState); |
| if (addedLast) |
| parser.translate(*(fChildren.end() - 1), defState); |
| } |
| |
| void SkSVGGradient::translateGradientUnits(SkString& units) { |
| // !!! no support for 'objectBoundingBox' yet |
| SkASSERT(strcmp(units.c_str(), "userSpaceOnUse") == 0); |
| } |
| |
| void SkSVGGradient::write(SkSVGParser& parser, SkString& baseColor) { |
| if (baseColor.c_str()[0] != '#') |
| return; |
| SkSVGPaint* saveHead = parser.fHead; |
| parser.fHead = &fPaintState; |
| parser.fSuppressPaint = true; |
| SkString originalID(f_id); |
| f_id.set("mask"); // write out gradient named given name + color (less initial #) |
| f_id.append(baseColor.c_str() + 1); |
| SkString originalColors; |
| for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { |
| SkSVGStop* colorElement = (SkSVGStop*) *ptr; |
| SkString& color = colorElement->fPaintState.f_stopColor; |
| originalColors.append(color); |
| originalColors.appendUnichar(','); |
| SkASSERT(color.c_str()[0] == '#'); |
| SkString replacement; |
| replacement.set("0x"); |
| replacement.append(color.c_str() + 1, 2); // add stop colors using given color, turning existing stop color into alpha |
| SkASSERT(baseColor.c_str()[0] == '#'); |
| SkASSERT(baseColor.size() == 7); |
| replacement.append(baseColor.c_str() + 1); |
| color.set(replacement); |
| } |
| translate(parser, true); |
| const char* originalPtr = originalColors.c_str(); // restore original gradient values |
| for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { |
| SkSVGStop* color = (SkSVGStop*) *ptr; |
| const char* originalEnd = strchr(originalPtr, ','); |
| color->fPaintState.f_stopColor.set(originalPtr, originalEnd - originalPtr); |
| originalPtr = originalEnd + 1; |
| } |
| f_id.set(originalID); |
| parser.fSuppressPaint = false; |
| parser.fHead = saveHead; |
| } |
| |