1 /*
2 * Copyright 2019 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 "GrGpuBuffer.h"
9 #include "GrCaps.h"
10 #include "GrGpu.h"
11
GrGpuBuffer(GrGpu * gpu,size_t sizeInBytes,GrGpuBufferType type,GrAccessPattern pattern)12 GrGpuBuffer::GrGpuBuffer(GrGpu* gpu, size_t sizeInBytes, GrGpuBufferType type,
13 GrAccessPattern pattern)
14 : GrGpuResource(gpu)
15 , fMapPtr(nullptr)
16 , fSizeInBytes(sizeInBytes)
17 , fAccessPattern(pattern)
18 , fIntendedType(type) {}
19
ComputeScratchKeyForDynamicVBO(size_t size,GrGpuBufferType intendedType,GrScratchKey * key)20 void GrGpuBuffer::ComputeScratchKeyForDynamicVBO(size_t size, GrGpuBufferType intendedType,
21 GrScratchKey* key) {
22 static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateResourceType();
23 GrScratchKey::Builder builder(key, kType, 1 + (sizeof(size_t) + 3) / 4);
24 // TODO: There's not always reason to cache a buffer by type. In some (all?) APIs it's just
25 // a chunk of memory we can use/reuse for any type of data. We really only need to
26 // differentiate between the "read" types (e.g. kGpuToCpu_BufferType) and "draw" types.
27 builder[0] = SkToU32(intendedType);
28 builder[1] = (uint32_t)size;
29 if (sizeof(size_t) > 4) {
30 builder[2] = (uint32_t)((uint64_t)size >> 32);
31 }
32 }
33
computeScratchKey(GrScratchKey * key) const34 void GrGpuBuffer::computeScratchKey(GrScratchKey* key) const {
35 if (SkIsPow2(fSizeInBytes) && kDynamic_GrAccessPattern == fAccessPattern) {
36 ComputeScratchKeyForDynamicVBO(fSizeInBytes, fIntendedType, key);
37 }
38 }
39