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