bsalomon | 16b9913 | 2015-08-13 14:55:50 -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 "GrVertexBatch.h" |
| 9 | #include "GrBatchTarget.h" |
| 10 | #include "GrResourceProvider.h" |
| 11 | |
| 12 | GrVertexBatch::GrVertexBatch() : fNumberOfDraws(0) {} |
| 13 | |
| 14 | void* GrVertexBatch::InstancedHelper::init(GrBatchTarget* batchTarget, GrPrimitiveType primType, |
| 15 | size_t vertexStride, const GrIndexBuffer* indexBuffer, |
| 16 | int verticesPerInstance, int indicesPerInstance, |
| 17 | int instancesToDraw) { |
| 18 | SkASSERT(batchTarget); |
| 19 | if (!indexBuffer) { |
| 20 | return NULL; |
| 21 | } |
| 22 | const GrVertexBuffer* vertexBuffer; |
| 23 | int firstVertex; |
| 24 | int vertexCount = verticesPerInstance * instancesToDraw; |
| 25 | void* vertices = batchTarget->makeVertSpace(vertexStride, vertexCount, |
| 26 | &vertexBuffer, &firstVertex); |
| 27 | if (!vertices) { |
| 28 | SkDebugf("Vertices could not be allocated for instanced rendering."); |
| 29 | return NULL; |
| 30 | } |
| 31 | SkASSERT(vertexBuffer); |
| 32 | size_t ibSize = indexBuffer->gpuMemorySize(); |
| 33 | int maxInstancesPerDraw = static_cast<int>(ibSize / (sizeof(uint16_t) * indicesPerInstance)); |
| 34 | |
| 35 | fVertices.initInstanced(primType, vertexBuffer, indexBuffer, |
| 36 | firstVertex, verticesPerInstance, indicesPerInstance, instancesToDraw, |
| 37 | maxInstancesPerDraw); |
| 38 | return vertices; |
| 39 | } |
| 40 | |
| 41 | void* GrVertexBatch::QuadHelper::init(GrBatchTarget* batchTarget, size_t vertexStride, |
| 42 | int quadsToDraw) { |
| 43 | SkAutoTUnref<const GrIndexBuffer> quadIndexBuffer( |
| 44 | batchTarget->resourceProvider()->refQuadIndexBuffer()); |
| 45 | if (!quadIndexBuffer) { |
| 46 | SkDebugf("Could not get quad index buffer."); |
| 47 | return NULL; |
| 48 | } |
| 49 | return this->INHERITED::init(batchTarget, kTriangles_GrPrimitiveType, vertexStride, |
| 50 | quadIndexBuffer, kVerticesPerQuad, kIndicesPerQuad, quadsToDraw); |
| 51 | } |