michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkSVGGradient.h"
michael@0: #include "SkSVGParser.h"
michael@0: #include "SkSVGStop.h"
michael@0: 
michael@0: SkSVGGradient::SkSVGGradient() {
michael@0: }
michael@0: 
michael@0: SkSVGElement* SkSVGGradient::getGradient() {
michael@0:     return this;
michael@0: }
michael@0: 
michael@0: bool SkSVGGradient::isDef() {
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: bool SkSVGGradient::isNotDef() {
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: void SkSVGGradient::translate(SkSVGParser& parser, bool defState) {
michael@0:     INHERITED::translate(parser, defState);
michael@0:     // !!! no support for 'objectBoundingBox' yet
michael@0:     bool first = true;
michael@0:     bool addedFirst = false;
michael@0:     bool addedLast = false;
michael@0:     SkString offsets("[");
michael@0:     SkString* lastOffset = NULL;
michael@0:     for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
michael@0:         SkASSERT((*ptr)->getType() == SkSVGType_Stop);
michael@0:         SkSVGStop* stop = (SkSVGStop*) *ptr;
michael@0:         if (first && stop->f_offset.equals("0") == false) {
michael@0:             addedFirst = true;
michael@0:             offsets.append("0,");
michael@0:         }
michael@0:         SkString* thisOffset = &stop->f_offset;
michael@0:         if (lastOffset && thisOffset->equals(*lastOffset)) {
michael@0:             if (thisOffset->equals("1")) {
michael@0:                 offsets.remove(offsets.size() - 2, 2);
michael@0:                 offsets.append(".999,");
michael@0:             } else {
michael@0:                 SkASSERT(0); // !!! need to write this case
michael@0:             }
michael@0:         }
michael@0:         offsets.append(*thisOffset);
michael@0:         if (ptr == fChildren.end() - 1) { // last
michael@0:             if (stop->f_offset.equals("1") == false) {
michael@0:                 offsets.append(",1");
michael@0:                 addedLast = true;
michael@0:             }
michael@0:         } else
michael@0:             offsets.appendUnichar(',');
michael@0:         first = false;
michael@0:         lastOffset = thisOffset;
michael@0:     }
michael@0:     offsets.appendUnichar(']');
michael@0:     parser._addAttribute("offsets", offsets);
michael@0:     if (addedFirst)
michael@0:         parser.translate(*fChildren.begin(), defState);
michael@0:     for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++)
michael@0:         parser.translate(*ptr, defState);
michael@0:     if (addedLast)
michael@0:         parser.translate(*(fChildren.end() - 1), defState);
michael@0: }
michael@0: 
michael@0: void SkSVGGradient::translateGradientUnits(SkString& units) {
michael@0:     // !!! no support for 'objectBoundingBox' yet
michael@0:     SkASSERT(strcmp(units.c_str(), "userSpaceOnUse") == 0);
michael@0: }
michael@0: 
michael@0: void SkSVGGradient::write(SkSVGParser& parser, SkString& baseColor) {
michael@0:     if (baseColor.c_str()[0] != '#')
michael@0:         return;
michael@0:     SkSVGPaint* saveHead = parser.fHead;
michael@0:     parser.fHead = &fPaintState;
michael@0:     parser.fSuppressPaint = true;
michael@0:     SkString originalID(f_id);
michael@0:     f_id.set("mask"); // write out gradient named given name + color (less initial #)
michael@0:     f_id.append(baseColor.c_str() + 1);
michael@0:     SkString originalColors;
michael@0:     for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
michael@0:         SkSVGStop* colorElement = (SkSVGStop*) *ptr;
michael@0:         SkString& color = colorElement->fPaintState.f_stopColor;
michael@0:         originalColors.append(color);
michael@0:         originalColors.appendUnichar(',');
michael@0:         SkASSERT(color.c_str()[0] == '#');
michael@0:         SkString replacement;
michael@0:         replacement.set("0x");
michael@0:         replacement.append(color.c_str() + 1, 2); // add stop colors using given color, turning existing stop color into alpha
michael@0:         SkASSERT(baseColor.c_str()[0] == '#');
michael@0:         SkASSERT(baseColor.size() == 7);
michael@0:         replacement.append(baseColor.c_str() + 1);
michael@0:         color.set(replacement);
michael@0:     }
michael@0:     translate(parser, true);
michael@0:     const char* originalPtr = originalColors.c_str(); // restore original gradient values
michael@0:     for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
michael@0:         SkSVGStop* color = (SkSVGStop*) *ptr;
michael@0:         const char* originalEnd = strchr(originalPtr, ',');
michael@0:         color->fPaintState.f_stopColor.set(originalPtr, originalEnd - originalPtr);
michael@0:         originalPtr = originalEnd + 1;
michael@0:     }
michael@0:     f_id.set(originalID);
michael@0:     parser.fSuppressPaint = false;
michael@0:     parser.fHead = saveHead;
michael@0: }