michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 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: 
michael@0: #include "GrPathRendererChain.h"
michael@0: 
michael@0: #include "GrContext.h"
michael@0: #include "GrDefaultPathRenderer.h"
michael@0: #include "GrDrawTargetCaps.h"
michael@0: #include "GrGpu.h"
michael@0: 
michael@0: GrPathRendererChain::GrPathRendererChain(GrContext* context)
michael@0:     : fInit(false)
michael@0:     , fOwner(context) {
michael@0: }
michael@0: 
michael@0: GrPathRendererChain::~GrPathRendererChain() {
michael@0:     for (int i = 0; i < fChain.count(); ++i) {
michael@0:         fChain[i]->unref();
michael@0:     }
michael@0: }
michael@0: 
michael@0: GrPathRenderer* GrPathRendererChain::addPathRenderer(GrPathRenderer* pr) {
michael@0:     fChain.push_back() = pr;
michael@0:     pr->ref();
michael@0:     return pr;
michael@0: }
michael@0: 
michael@0: GrPathRenderer* GrPathRendererChain::getPathRenderer(const SkPath& path,
michael@0:                                                      const SkStrokeRec& stroke,
michael@0:                                                      const GrDrawTarget* target,
michael@0:                                                      DrawType drawType,
michael@0:                                                      StencilSupport* stencilSupport) {
michael@0:     if (!fInit) {
michael@0:         this->init();
michael@0:     }
michael@0:     bool antiAlias = (kColorAntiAlias_DrawType == drawType ||
michael@0:                       kStencilAndColorAntiAlias_DrawType == drawType);
michael@0: 
michael@0:     GR_STATIC_ASSERT(GrPathRenderer::kNoSupport_StencilSupport <
michael@0:                      GrPathRenderer::kStencilOnly_StencilSupport);
michael@0:     GR_STATIC_ASSERT(GrPathRenderer::kStencilOnly_StencilSupport <
michael@0:                      GrPathRenderer::kNoRestriction_StencilSupport);
michael@0:     GrPathRenderer::StencilSupport minStencilSupport;
michael@0:     if (kStencilOnly_DrawType == drawType) {
michael@0:         minStencilSupport = GrPathRenderer::kStencilOnly_StencilSupport;
michael@0:     } else if (kStencilAndColor_DrawType == drawType ||
michael@0:                kStencilAndColorAntiAlias_DrawType == drawType) {
michael@0:         minStencilSupport = GrPathRenderer::kNoRestriction_StencilSupport;
michael@0:     } else {
michael@0:         minStencilSupport = GrPathRenderer::kNoSupport_StencilSupport;
michael@0:     }
michael@0: 
michael@0: 
michael@0:     for (int i = 0; i < fChain.count(); ++i) {
michael@0:         if (fChain[i]->canDrawPath(path, stroke, target, antiAlias)) {
michael@0:             if (GrPathRenderer::kNoSupport_StencilSupport != minStencilSupport) {
michael@0:                 GrPathRenderer::StencilSupport support = fChain[i]->getStencilSupport(path,
michael@0:                                                                                       stroke,
michael@0:                                                                                       target);
michael@0:                 if (support < minStencilSupport) {
michael@0:                     continue;
michael@0:                 } else if (NULL != stencilSupport) {
michael@0:                     *stencilSupport = support;
michael@0:                 }
michael@0:             }
michael@0:             return fChain[i];
michael@0:         }
michael@0:     }
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: void GrPathRendererChain::init() {
michael@0:     SkASSERT(!fInit);
michael@0:     GrGpu* gpu = fOwner->getGpu();
michael@0:     bool twoSided = gpu->caps()->twoSidedStencilSupport();
michael@0:     bool wrapOp = gpu->caps()->stencilWrapOpsSupport();
michael@0:     GrPathRenderer::AddPathRenderers(fOwner, this);
michael@0:     this->addPathRenderer(SkNEW_ARGS(GrDefaultPathRenderer,
michael@0:                                      (twoSided, wrapOp)))->unref();
michael@0:     fInit = true;
michael@0: }