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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 "GrStencilBuffer.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrResourceCache.h"
SK_DEFINE_INST_COUNT(GrStencilBuffer)
GR_DEFINE_RESOURCE_CACHE_TYPE(GrStencilBuffer)
void GrStencilBuffer::transferToCache() {
GrAssert(NULL == this->getCacheEntry());
this->getGpu()->getContext()->addStencilBuffer(this);
}
namespace {
// we should never have more than one stencil buffer with same combo of
// (width,height,samplecount)
void gen_stencil_key_values(int width,
int height,
int sampleCnt,
GrCacheID* cacheID) {
cacheID->fPublicID = GrCacheID::kDefaultPublicCacheID;
cacheID->fResourceSpecific32 = width | (height << 16);
cacheID->fDomain = GrCacheData::kScratch_ResourceDomain;
GrAssert(sampleCnt >= 0 && sampleCnt < 256);
cacheID->fResourceSpecific16 = sampleCnt << 8;
// last 8 bits of 'fResourceSpecific16' is free for flags
}
}
GrResourceKey GrStencilBuffer::ComputeKey(int width,
int height,
int sampleCnt) {
GrCacheID id(GrStencilBuffer::GetResourceType());
gen_stencil_key_values(width, height, sampleCnt, &id);
uint32_t v[4];
id.toRaw(v);
return GrResourceKey(v);
}
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