1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #include "GrStencilBuffer.h" 10 11 #include "GrContext.h" 12 #include "GrGpu.h" 13 #include "GrResourceCache.h" 14 15 void GrStencilBuffer::transferToCache() { 16 SkASSERT(NULL == this->getCacheEntry()); 17 18 this->getGpu()->getContext()->addStencilBuffer(this); 19 } 20 21 namespace { 22 // we should never have more than one stencil buffer with same combo of (width,height,samplecount) 23 void gen_cache_id(int width, int height, int sampleCnt, GrCacheID* cacheID) { 24 static const GrCacheID::Domain gStencilBufferDomain = GrCacheID::GenerateDomain(); 25 GrCacheID::Key key; 26 uint32_t* keyData = key.fData32; 27 keyData[0] = width; 28 keyData[1] = height; 29 keyData[2] = sampleCnt; 30 memset(keyData + 3, 0, sizeof(key) - 3 * sizeof(uint32_t)); 31 GR_STATIC_ASSERT(sizeof(key) >= 3 * sizeof(uint32_t)); 32 cacheID->reset(gStencilBufferDomain, key); 33 } 34 } 35 36 GrResourceKey GrStencilBuffer::ComputeKey(int width, 37 int height, 38 int sampleCnt) { 39 // All SBs are created internally to attach to RTs so they all use the same domain. 40 static const GrResourceKey::ResourceType gStencilBufferResourceType = 41 GrResourceKey::GenerateResourceType(); 42 GrCacheID id; 43 gen_cache_id(width, height, sampleCnt, &id); 44 45 // we don't use any flags for SBs currently. 46 return GrResourceKey(id, gStencilBufferResourceType, 0); 47 } 48
