1 /*
2 * Copyright 2013 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 "GrGLBufferImpl.h"
9 #include "GrGLGpu.h"
10
11 #define GL_CALL(GPU, X) GR_GL_CALL(GPU->glInterface(), X)
12
13 #ifdef SK_DEBUG
14 #define VALIDATE() this->validate()
15 #else
16 #define VALIDATE() do {} while(false)
17 #endif
18
GrGLBufferImpl(GrGLGpu * gpu,const Desc & desc,GrGLenum bufferType)19 GrGLBufferImpl::GrGLBufferImpl(GrGLGpu* gpu, const Desc& desc, GrGLenum bufferType)
20 : fDesc(desc)
21 , fBufferType(bufferType)
22 , fMapPtr(nullptr) {
23 if (0 == desc.fID) {
24 if (gpu->caps()->mustClearUploadedBufferData()) {
25 fCPUData = sk_calloc_throw(desc.fSizeInBytes);
26 } else {
27 fCPUData = sk_malloc_flags(desc.fSizeInBytes, SK_MALLOC_THROW);
28 }
29 fGLSizeInBytes = 0;
30 } else {
31 fCPUData = nullptr;
32 // We assume that the GL buffer was created at the desc's size initially.
33 fGLSizeInBytes = fDesc.fSizeInBytes;
34 }
35 VALIDATE();
36 }
37
release(GrGLGpu * gpu)38 void GrGLBufferImpl::release(GrGLGpu* gpu) {
39 VALIDATE();
40 // make sure we've not been abandoned or already released
41 if (fCPUData) {
42 sk_free(fCPUData);
43 fCPUData = nullptr;
44 } else if (fDesc.fID) {
45 gpu->releaseBuffer(fDesc.fID, fBufferType);
46 fDesc.fID = 0;
47 fGLSizeInBytes = 0;
48 }
49 fMapPtr = nullptr;
50 VALIDATE();
51 }
52
abandon()53 void GrGLBufferImpl::abandon() {
54 fDesc.fID = 0;
55 fGLSizeInBytes = 0;
56 fMapPtr = nullptr;
57 sk_free(fCPUData);
58 fCPUData = nullptr;
59 VALIDATE();
60 }
61
map(GrGLGpu * gpu)62 void* GrGLBufferImpl::map(GrGLGpu* gpu) {
63 VALIDATE();
64 SkASSERT(!this->isMapped());
65 if (0 == fDesc.fID) {
66 fMapPtr = fCPUData;
67 } else {
68 fMapPtr = gpu->mapBuffer(fDesc.fID, fBufferType, fDesc.fUsage, fGLSizeInBytes,
69 fDesc.fSizeInBytes);
70 fGLSizeInBytes = fDesc.fSizeInBytes;
71 }
72 VALIDATE();
73 return fMapPtr;
74 }
75
unmap(GrGLGpu * gpu)76 void GrGLBufferImpl::unmap(GrGLGpu* gpu) {
77 VALIDATE();
78 SkASSERT(this->isMapped());
79 if (0 != fDesc.fID) {
80 gpu->unmapBuffer(fDesc.fID, fBufferType, fMapPtr);
81 }
82 fMapPtr = nullptr;
83 }
84
isMapped() const85 bool GrGLBufferImpl::isMapped() const {
86 VALIDATE();
87 return SkToBool(fMapPtr);
88 }
89
updateData(GrGLGpu * gpu,const void * src,size_t srcSizeInBytes)90 bool GrGLBufferImpl::updateData(GrGLGpu* gpu, const void* src, size_t srcSizeInBytes) {
91 SkASSERT(!this->isMapped());
92 SkASSERT(GR_GL_ARRAY_BUFFER == fBufferType || GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
93 VALIDATE();
94 if (srcSizeInBytes > fDesc.fSizeInBytes) {
95 return false;
96 }
97 if (0 == fDesc.fID) {
98 memcpy(fCPUData, src, srcSizeInBytes);
99 return true;
100 }
101 gpu->bufferData(fDesc.fID, fBufferType, fDesc.fUsage, fDesc.fSizeInBytes, src,
102 srcSizeInBytes);
103 #if GR_GL_USE_BUFFER_DATA_NULL_HINT
104 fGLSizeInBytes = fDesc.fSizeInBytes;
105 #else
106 fGLSizeInBytes = srcSizeInBytes;
107 #endif
108 VALIDATE();
109 return true;
110 }
111
validate() const112 void GrGLBufferImpl::validate() const {
113 SkASSERT(GR_GL_ARRAY_BUFFER == fBufferType || GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType ||
114 GR_GL_PIXEL_PACK_BUFFER == fBufferType || GR_GL_PIXEL_UNPACK_BUFFER == fBufferType ||
115 GR_GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM == fBufferType ||
116 GR_GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM == fBufferType);
117 // The following assert isn't valid when the buffer has been abandoned:
118 // SkASSERT((0 == fDesc.fID) == (fCPUData));
119 SkASSERT(nullptr == fCPUData || 0 == fGLSizeInBytes);
120 SkASSERT(nullptr == fMapPtr || fCPUData || fGLSizeInBytes <= fDesc.fSizeInBytes);
121 SkASSERT(nullptr == fCPUData || nullptr == fMapPtr || fCPUData == fMapPtr);
122 }
123