1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "GrResourceProvider.h" 9 10 #include "GrGpu.h" 11 #include "GrResourceCache.h" 12 #include "GrResourceKey.h" 13 #include "GrVertexBuffer.h" 14 15 GR_DECLARE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey); 16 17 GrResourceProvider::GrResourceProvider(GrGpu* gpu, GrResourceCache* cache) : INHERITED(gpu, cache) { 18 GR_DEFINE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey); 19 fQuadIndexBufferKey = gQuadIndexBufferKey; 20 } 21 22 const GrIndexBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16_t* pattern, 23 int patternSize, 24 int reps, 25 int vertCount, 26 const GrUniqueKey& key) { 27 size_t bufferSize = patternSize * reps * sizeof(uint16_t); 28 29 GrIndexBuffer* buffer = this->gpu()->createIndexBuffer(bufferSize, /* dynamic = */ false); 30 if (!buffer) { 31 return NULL; 32 } 33 uint16_t* data = (uint16_t*) buffer->map(); 34 bool useTempData = (NULL == data); 35 if (useTempData) { 36 data = SkNEW_ARRAY(uint16_t, reps * patternSize); 37 } 38 for (int i = 0; i < reps; ++i) { 39 int baseIdx = i * patternSize; 40 uint16_t baseVert = (uint16_t)(i * vertCount); 41 for (int j = 0; j < patternSize; ++j) { 42 data[baseIdx+j] = baseVert + pattern[j]; 43 } 44 } 45 if (useTempData) { 46 if (!buffer->updateData(data, bufferSize)) { 47 buffer->unref(); 48 return NULL; 49 } 50 SkDELETE_ARRAY(data); 51 } else { 52 buffer->unmap(); 53 } 54 this->assignUniqueKeyToResource(key, buffer); 55 return buffer; 56 } 57 58 const GrIndexBuffer* GrResourceProvider::createQuadIndexBuffer() { 59 static const int kMaxQuads = 1 << 12; // max possible: (1 << 14) - 1; 60 GR_STATIC_ASSERT(4 * kMaxQuads <= 65535); 61 static const uint16_t kPattern[] = { 0, 1, 2, 0, 2, 3 }; 62 63 return this->createInstancedIndexBuffer(kPattern, 6, kMaxQuads, 4, fQuadIndexBufferKey); 64 } 65 66
