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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 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 "SkImageInfo.h" | 8 #include "SkImageInfo.h" |
9 #include "SkReadBuffer.h" | 9 #include "SkReadBuffer.h" |
10 #include "SkWriteBuffer.h" | 10 #include "SkWriteBuffer.h" |
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83 #include "SkReadPixelsRec.h" | 83 #include "SkReadPixelsRec.h" |
84 | 84 |
85 bool SkReadPixelsRec::trim(int srcWidth, int srcHeight) { | 85 bool SkReadPixelsRec::trim(int srcWidth, int srcHeight) { |
86 switch (fInfo.colorType()) { | 86 switch (fInfo.colorType()) { |
87 case kUnknown_SkColorType: | 87 case kUnknown_SkColorType: |
88 case kIndex_8_SkColorType: | 88 case kIndex_8_SkColorType: |
89 return false; | 89 return false; |
90 default: | 90 default: |
91 break; | 91 break; |
92 } | 92 } |
93 if (NULL == fPixels || fRowBytes < fInfo.minRowBytes()) { | 93 if (nullptr == fPixels || fRowBytes < fInfo.minRowBytes()) { |
94 return false; | 94 return false; |
95 } | 95 } |
96 if (0 == fInfo.width() || 0 == fInfo.height()) { | 96 if (0 == fInfo.width() || 0 == fInfo.height()) { |
97 return false; | 97 return false; |
98 } | 98 } |
99 | 99 |
100 int x = fX; | 100 int x = fX; |
101 int y = fY; | 101 int y = fY; |
102 SkIRect srcR = SkIRect::MakeXYWH(x, y, fInfo.width(), fInfo.height()); | 102 SkIRect srcR = SkIRect::MakeXYWH(x, y, fInfo.width(), fInfo.height()); |
103 if (!srcR.intersect(0, 0, srcWidth, srcHeight)) { | 103 if (!srcR.intersect(0, 0, srcWidth, srcHeight)) { |
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114 // here x,y are either 0 or negative | 114 // here x,y are either 0 or negative |
115 fPixels = ((char*)fPixels - y * fRowBytes - x * fInfo.bytesPerPixel()); | 115 fPixels = ((char*)fPixels - y * fRowBytes - x * fInfo.bytesPerPixel()); |
116 // the intersect may have shrunk info's logical size | 116 // the intersect may have shrunk info's logical size |
117 fInfo = fInfo.makeWH(srcR.width(), srcR.height()); | 117 fInfo = fInfo.makeWH(srcR.width(), srcR.height()); |
118 fX = srcR.x(); | 118 fX = srcR.x(); |
119 fY = srcR.y(); | 119 fY = srcR.y(); |
120 | 120 |
121 return true; | 121 return true; |
122 } | 122 } |
123 | 123 |
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