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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "gl/GrGLExtensions.h" | 8 #include "gl/GrGLExtensions.h" |
9 #include "gl/GrGLDefines.h" | 9 #include "gl/GrGLDefines.h" |
10 #include "gl/GrGLUtil.h" | 10 #include "gl/GrGLUtil.h" |
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44 fStrings.push_back_n(extensionCnt); | 44 fStrings.push_back_n(extensionCnt); |
45 for (int i = 0; i < extensionCnt; ++i) { | 45 for (int i = 0; i < extensionCnt; ++i) { |
46 const char* ext = (const char*) getStringi(GR_GL_EXTENSIONS, i); | 46 const char* ext = (const char*) getStringi(GR_GL_EXTENSIONS, i); |
47 fStrings[i] = ext; | 47 fStrings[i] = ext; |
48 } | 48 } |
49 } else { | 49 } else { |
50 const char* extensions = (const char*) getString(GR_GL_EXTENSIONS); | 50 const char* extensions = (const char*) getString(GR_GL_EXTENSIONS); |
51 if (NULL == extensions) { | 51 if (NULL == extensions) { |
52 return false; | 52 return false; |
53 } | 53 } |
54 // First count the extensions so that we don't cause the array to malloc
multiple times. | |
55 int extensionCnt = 1; | |
56 const char* e = (const char*) extensions; | |
57 while (NULL != (e = strchr(e+1, ' '))) { | |
58 e += 1; | |
59 ++extensionCnt; | |
60 } | |
61 fStrings.push_back_n(extensionCnt); | |
62 | |
63 int i = 0; | |
64 while (true) { | 54 while (true) { |
65 size_t length = strcspn(extensions, " "); | 55 // skip over multiple spaces between extensions |
66 GrAssert(i < extensionCnt); | 56 while (' ' == *extensions) { |
67 fStrings[i].set(extensions, length); | 57 ++extensions; |
68 ++i; | 58 } |
69 if ('\0' == extensions[length]) { | 59 // quit once we reach the end of the string. |
| 60 if ('\0' == *extensions) { |
70 break; | 61 break; |
71 } | 62 } |
72 extensions += length + 1; | 63 // we found an extension |
| 64 size_t length = strcspn(extensions, " "); |
| 65 fStrings.push_back().set(extensions, length); |
| 66 extensions += length; |
73 } | 67 } |
74 GrAssert(i == extensionCnt); | |
75 } | 68 } |
76 SkTSearchCompareLTFunctor<SkString, extension_compare> cmp; | 69 SkTSearchCompareLTFunctor<SkString, extension_compare> cmp; |
77 SkTQSort(&fStrings.front(), &fStrings.back(), cmp); | 70 SkTQSort(&fStrings.front(), &fStrings.back(), cmp); |
78 return true; | 71 return true; |
79 } | 72 } |
80 | 73 |
81 bool GrGLExtensions::has(const char* ext) const { | 74 bool GrGLExtensions::has(const char* ext) const { |
82 SkString extensionStr(ext); | 75 SkString extensionStr(ext); |
83 int idx = SkTSearch<SkString, extension_compare>(&fStrings.front(), | 76 int idx = SkTSearch<SkString, extension_compare>(&fStrings.front(), |
84 fStrings.count(), | 77 fStrings.count(), |
85 extensionStr, | 78 extensionStr, |
86 sizeof(SkString)); | 79 sizeof(SkString)); |
87 return idx >= 0; | 80 return idx >= 0; |
88 } | 81 } |
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