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 SK_DEFINE_INST_COUNT(GrStencilBuffer) 16 17 void GrStencilBuffer::transferToCache() { 18 GrAssert(NULL == this->getCacheEntry()); 19 20 this->getGpu()->getContext()->addStencilBuffer(this); 21 } 22 23 namespace { 24 // we should never have more than one stencil buffer with same combo of (width,height,samplecount) 25 void gen_cache_id(int width, int height, int sampleCnt, GrCacheID* cacheID) { 26 static const GrCacheID::Domain gStencilBufferDomain = GrCacheID::GenerateDomain(); 27 GrCacheID::Key key; 28 uint32_t* keyData = key.fData32; 29 keyData[0] = width; 30 keyData[1] = height; 31 keyData[2] = sampleCnt; 32 memset(keyData + 3, 0, sizeof(key) - 3 * sizeof(uint32_t)); 33 GR_STATIC_ASSERT(sizeof(key) >= 3 * sizeof(uint32_t)); 34 cacheID->reset(gStencilBufferDomain, key); 35 } 36 } 37 38 GrResourceKey GrStencilBuffer::ComputeKey(int width, 39 int height, 40 int sampleCnt) { 41 // All SBs are created internally to attach to RTs so they all use the same domain. 42 static const GrResourceKey::ResourceType gStencilBufferResourceType = 43 GrResourceKey::GenerateResourceType(); 44 GrCacheID id; 45 gen_cache_id(width, height, sampleCnt, &id); 46 47 // we don't use any flags for SBs currently. 48 return GrResourceKey(id, gStencilBufferResourceType, 0); 49 } 50
