1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #include "SkSVGGradient.h" 11 #include "SkSVGParser.h" 12 #include "SkSVGStop.h" 13 14 SkSVGGradient::SkSVGGradient() { 15 } 16 17 SkSVGElement* SkSVGGradient::getGradient() { 18 return this; 19 } 20 21 bool SkSVGGradient::isDef() { 22 return true; 23 } 24 25 bool SkSVGGradient::isNotDef() { 26 return false; 27 } 28 29 void SkSVGGradient::translate(SkSVGParser& parser, bool defState) { 30 INHERITED::translate(parser, defState); 31 // !!! no support for 'objectBoundingBox' yet 32 bool first = true; 33 bool addedFirst = false; 34 bool addedLast = false; 35 SkString offsets("["); 36 SkString* lastOffset = NULL; 37 for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { 38 SkASSERT((*ptr)->getType() == SkSVGType_Stop); 39 SkSVGStop* stop = (SkSVGStop*) *ptr; 40 if (first && stop->f_offset.equals("0") == false) { 41 addedFirst = true; 42 offsets.append("0,"); 43 } 44 SkString* thisOffset = &stop->f_offset; 45 if (lastOffset && thisOffset->equals(*lastOffset)) { 46 if (thisOffset->equals("1")) { 47 offsets.remove(offsets.size() - 2, 2); 48 offsets.append(".999,"); 49 } else { 50 SkASSERT(0); // !!! need to write this case 51 } 52 } 53 offsets.append(*thisOffset); 54 if (ptr == fChildren.end() - 1) { // last 55 if (stop->f_offset.equals("1") == false) { 56 offsets.append(",1"); 57 addedLast = true; 58 } 59 } else 60 offsets.appendUnichar(','); 61 first = false; 62 lastOffset = thisOffset; 63 } 64 offsets.appendUnichar(']'); 65 parser._addAttribute("offsets", offsets); 66 if (addedFirst) 67 parser.translate(*fChildren.begin(), defState); 68 for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) 69 parser.translate(*ptr, defState); 70 if (addedLast) 71 parser.translate(*(fChildren.end() - 1), defState); 72 } 73 74 void SkSVGGradient::translateGradientUnits(SkString& units) { 75 // !!! no support for 'objectBoundingBox' yet 76 SkASSERT(strcmp(units.c_str(), "userSpaceOnUse") == 0); 77 } 78 79 void SkSVGGradient::write(SkSVGParser& parser, SkString& baseColor) { 80 if (baseColor.c_str()[0] != '#') 81 return; 82 SkSVGPaint* saveHead = parser.fHead; 83 parser.fHead = &fPaintState; 84 parser.fSuppressPaint = true; 85 SkString originalID(f_id); 86 f_id.set("mask"); // write out gradient named given name + color (less initial #) 87 f_id.append(baseColor.c_str() + 1); 88 SkString originalColors; 89 for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { 90 SkSVGStop* colorElement = (SkSVGStop*) *ptr; 91 SkString& color = colorElement->fPaintState.f_stopColor; 92 originalColors.append(color); 93 originalColors.appendUnichar(','); 94 SkASSERT(color.c_str()[0] == '#'); 95 SkString replacement; 96 replacement.set("0x"); 97 replacement.append(color.c_str() + 1, 2); // add stop colors using given color, turning existing stop color into alpha 98 SkASSERT(baseColor.c_str()[0] == '#'); 99 SkASSERT(baseColor.size() == 7); 100 replacement.append(baseColor.c_str() + 1); 101 color.set(replacement); 102 } 103 translate(parser, true); 104 const char* originalPtr = originalColors.c_str(); // restore original gradient values 105 for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) { 106 SkSVGStop* color = (SkSVGStop*) *ptr; 107 const char* originalEnd = strchr(originalPtr, ','); 108 color->fPaintState.f_stopColor.set(originalPtr, originalEnd - originalPtr); 109 originalPtr = originalEnd + 1; 110 } 111 f_id.set(originalID); 112 parser.fSuppressPaint = false; 113 parser.fHead = saveHead; 114 } 115
