michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
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: #include "SkStrokeRec.h"
michael@0: #include "SkPaintDefaults.h"
michael@0: 
michael@0: // must be < 0, since ==0 means hairline, and >0 means normal stroke
michael@0: #define kStrokeRec_FillStyleWidth     (-SK_Scalar1)
michael@0: 
michael@0: SkStrokeRec::SkStrokeRec(InitStyle s) {
michael@0:     fWidth          = (kFill_InitStyle == s) ? kStrokeRec_FillStyleWidth : 0;
michael@0:     fMiterLimit     = SkPaintDefaults_MiterLimit;
michael@0:     fCap            = SkPaint::kDefault_Cap;
michael@0:     fJoin           = SkPaint::kDefault_Join;
michael@0:     fStrokeAndFill  = false;
michael@0: }
michael@0: 
michael@0: SkStrokeRec::SkStrokeRec(const SkStrokeRec& src) {
michael@0:     memcpy(this, &src, sizeof(src));
michael@0: }
michael@0: 
michael@0: SkStrokeRec::SkStrokeRec(const SkPaint& paint) {
michael@0:     switch (paint.getStyle()) {
michael@0:         case SkPaint::kFill_Style:
michael@0:             fWidth = kStrokeRec_FillStyleWidth;
michael@0:             fStrokeAndFill = false;
michael@0:             break;
michael@0:         case SkPaint::kStroke_Style:
michael@0:             fWidth = paint.getStrokeWidth();
michael@0:             fStrokeAndFill = false;
michael@0:             break;
michael@0:         case SkPaint::kStrokeAndFill_Style:
michael@0:             if (0 == paint.getStrokeWidth()) {
michael@0:                 // hairline+fill == fill
michael@0:                 fWidth = kStrokeRec_FillStyleWidth;
michael@0:                 fStrokeAndFill = false;
michael@0:             } else {
michael@0:                 fWidth = paint.getStrokeWidth();
michael@0:                 fStrokeAndFill = true;
michael@0:             }
michael@0:             break;
michael@0:         default:
michael@0:             SkDEBUGFAIL("unknown paint style");
michael@0:             // fall back on just fill
michael@0:             fWidth = kStrokeRec_FillStyleWidth;
michael@0:             fStrokeAndFill = false;
michael@0:             break;
michael@0:     }
michael@0: 
michael@0:     // copy these from the paint, regardless of our "style"
michael@0:     fMiterLimit = paint.getStrokeMiter();
michael@0:     fCap        = paint.getStrokeCap();
michael@0:     fJoin       = paint.getStrokeJoin();
michael@0: }
michael@0: 
michael@0: SkStrokeRec::Style SkStrokeRec::getStyle() const {
michael@0:     if (fWidth < 0) {
michael@0:         return kFill_Style;
michael@0:     } else if (0 == fWidth) {
michael@0:         return kHairline_Style;
michael@0:     } else {
michael@0:         return fStrokeAndFill ? kStrokeAndFill_Style : kStroke_Style;
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkStrokeRec::setFillStyle() {
michael@0:     fWidth = kStrokeRec_FillStyleWidth;
michael@0:     fStrokeAndFill = false;
michael@0: }
michael@0: 
michael@0: void SkStrokeRec::setHairlineStyle() {
michael@0:     fWidth = 0;
michael@0:     fStrokeAndFill = false;
michael@0: }
michael@0: 
michael@0: void SkStrokeRec::setStrokeStyle(SkScalar width, bool strokeAndFill) {
michael@0:     if (strokeAndFill && (0 == width)) {
michael@0:         // hairline+fill == fill
michael@0:         this->setFillStyle();
michael@0:     } else {
michael@0:         fWidth = width;
michael@0:         fStrokeAndFill = strokeAndFill;
michael@0:     }
michael@0: }
michael@0: 
michael@0: #include "SkStroke.h"
michael@0: 
michael@0: bool SkStrokeRec::applyToPath(SkPath* dst, const SkPath& src) const {
michael@0:     if (fWidth <= 0) {  // hairline or fill
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     SkStroke stroker;
michael@0:     stroker.setCap(fCap);
michael@0:     stroker.setJoin(fJoin);
michael@0:     stroker.setMiterLimit(fMiterLimit);
michael@0:     stroker.setWidth(fWidth);
michael@0:     stroker.setDoFill(fStrokeAndFill);
michael@0:     stroker.strokePath(src, dst);
michael@0:     return true;
michael@0: }