bsalomon | ed0bcad | 2015-05-04 10:36:42 -0700 | [diff] [blame^] | 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 | |