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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2010 Google Inc. | 3 * Copyright 2010 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 | 10 |
11 #ifndef GrIndexBuffer_DEFINED | 11 #ifndef GrIndexBuffer_DEFINED |
12 #define GrIndexBuffer_DEFINED | 12 #define GrIndexBuffer_DEFINED |
13 | 13 |
14 #include "GrGeometryBuffer.h" | 14 #include "GrGeometryBuffer.h" |
15 | 15 |
16 | |
17 class GrIndexBuffer : public GrGeometryBuffer { | 16 class GrIndexBuffer : public GrGeometryBuffer { |
18 public: | 17 public: |
19 static void ComputeScratchKey(size_t size, bool dynamic, GrScratchKey* key)
{ | |
20 static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateRe
sourceType(); | |
21 | |
22 GrScratchKey::Builder builder(key, kType, 2); | |
23 | |
24 builder[0] = SkToUInt(size); | |
25 builder[1] = dynamic ? 1 : 0; | |
26 } | |
27 | |
28 /** | 18 /** |
29 * Retrieves the maximum number of quads that could be rendered | 19 * Retrieves the maximum number of quads that could be rendered |
30 * from the index buffer (using kTriangles_GrPrimitiveType). | 20 * from the index buffer (using kTriangles_GrPrimitiveType). |
31 * @return the maximum number of quads using full size of index buffer. | 21 * @return the maximum number of quads using full size of index buffer. |
32 */ | 22 */ |
33 int maxQuads() const { | 23 int maxQuads() const { |
34 return static_cast<int>(this->gpuMemorySize() / (sizeof(uint16_t) * 6)); | 24 return static_cast<int>(this->gpuMemorySize() / (sizeof(uint16_t) * 6)); |
35 } | 25 } |
36 protected: | 26 protected: |
37 GrIndexBuffer(GrGpu* gpu, size_t gpuMemorySize, bool dynamic, bool cpuBacked
) | 27 GrIndexBuffer(GrGpu* gpu, size_t gpuMemorySize, bool dynamic, bool cpuBacked
) |
38 : INHERITED(gpu, gpuMemorySize, dynamic, cpuBacked) { | 28 : INHERITED(gpu, gpuMemorySize, dynamic, cpuBacked) {} |
39 GrScratchKey key; | |
40 ComputeScratchKey(gpuMemorySize, dynamic, &key); | |
41 this->setScratchKey(key); | |
42 } | |
43 | |
44 private: | 29 private: |
45 typedef GrGeometryBuffer INHERITED; | 30 typedef GrGeometryBuffer INHERITED; |
46 }; | 31 }; |
47 | 32 |
48 #endif | 33 #endif |
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