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: #include "GrStencilBuffer.h"
michael@0: 
michael@0: #include "GrContext.h"
michael@0: #include "GrGpu.h"
michael@0: #include "GrResourceCache.h"
michael@0: 
michael@0: void GrStencilBuffer::transferToCache() {
michael@0:     SkASSERT(NULL == this->getCacheEntry());
michael@0: 
michael@0:     this->getGpu()->getContext()->addStencilBuffer(this);
michael@0: }
michael@0: 
michael@0: namespace {
michael@0: // we should never have more than one stencil buffer with same combo of (width,height,samplecount)
michael@0: void gen_cache_id(int width, int height, int sampleCnt, GrCacheID* cacheID) {
michael@0:     static const GrCacheID::Domain gStencilBufferDomain = GrCacheID::GenerateDomain();
michael@0:     GrCacheID::Key key;
michael@0:     uint32_t* keyData = key.fData32;
michael@0:     keyData[0] = width;
michael@0:     keyData[1] = height;
michael@0:     keyData[2] = sampleCnt;
michael@0:     memset(keyData + 3, 0, sizeof(key) - 3 * sizeof(uint32_t));
michael@0:     GR_STATIC_ASSERT(sizeof(key) >= 3 * sizeof(uint32_t));
michael@0:     cacheID->reset(gStencilBufferDomain, key);
michael@0: }
michael@0: }
michael@0: 
michael@0: GrResourceKey GrStencilBuffer::ComputeKey(int width,
michael@0:                                           int height,
michael@0:                                           int sampleCnt) {
michael@0:     // All SBs are created internally to attach to RTs so they all use the same domain.
michael@0:     static const GrResourceKey::ResourceType gStencilBufferResourceType =
michael@0:         GrResourceKey::GenerateResourceType();
michael@0:     GrCacheID id;
michael@0:     gen_cache_id(width, height, sampleCnt, &id);
michael@0: 
michael@0:     // we don't use any flags for SBs currently.
michael@0:     return GrResourceKey(id, gStencilBufferResourceType, 0);
michael@0: }