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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2011 Google Inc. | 3 * Copyright 2011 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 #include "SkClampRange.h" | 10 #include "SkClampRange.h" |
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70 fCount1 = fCount2 = 0; | 70 fCount1 = fCount2 = 0; |
71 fCount0 = count; | 71 fCount0 = count; |
72 return; | 72 return; |
73 } | 73 } |
74 if (fx >= kFracMax_SkGradFixed && ex >= kFracMax_SkGradFixed) { | 74 if (fx >= kFracMax_SkGradFixed && ex >= kFracMax_SkGradFixed) { |
75 fCount0 = fCount1 = 0; | 75 fCount0 = fCount1 = 0; |
76 fCount2 = count; | 76 fCount2 = count; |
77 return; | 77 return; |
78 } | 78 } |
79 | 79 |
80 int extraCount = 0; | |
81 | |
82 // now make ex be 1 past the last computed value | 80 // now make ex be 1 past the last computed value |
83 ex += dx; | 81 ex += dx; |
84 | 82 |
85 bool doSwap = dx < 0; | 83 bool doSwap = dx < 0; |
86 | 84 |
87 if (doSwap) { | 85 if (doSwap) { |
88 ex -= dx; | 86 ex -= dx; |
89 fx -= dx; | 87 fx -= dx; |
90 SkTSwap(fx, ex); | 88 SkTSwap(fx, ex); |
91 dx = -dx; | 89 dx = -dx; |
92 } | 90 } |
93 | 91 |
94 | 92 |
95 fCount0 = chop(fx, 0, ex, dx, count); | 93 fCount0 = chop(fx, 0, ex, dx, count); |
| 94 SkASSERT(fCount0 >= 0); |
| 95 SkASSERT(fCount0 <= count); |
96 count -= fCount0; | 96 count -= fCount0; |
97 fx += fCount0 * dx; | 97 fx += fCount0 * dx; |
98 SkASSERT(fx >= 0); | 98 SkASSERT(fx >= 0); |
99 SkASSERT(fCount0 == 0 || (fx - dx) < 0); | 99 SkASSERT(fCount0 == 0 || (fx - dx) < 0); |
100 fCount1 = chop(fx, kFracMax_SkGradFixed, ex, dx, count); | 100 fCount1 = chop(fx, kFracMax_SkGradFixed, ex, dx, count); |
| 101 SkASSERT(fCount1 >= 0); |
| 102 SkASSERT(fCount1 <= count); |
101 count -= fCount1; | 103 count -= fCount1; |
102 fCount2 = count; | 104 fCount2 = count; |
103 | 105 |
104 #ifdef SK_DEBUG | 106 #ifdef SK_DEBUG |
105 fx += fCount1 * dx; | 107 fx += fCount1 * dx; |
106 SkASSERT(fx <= ex); | 108 SkASSERT(fx <= ex); |
107 if (fCount2 > 0) { | 109 if (fCount2 > 0) { |
108 SkASSERT(fx >= kFracMax_SkGradFixed); | 110 SkASSERT(fx >= kFracMax_SkGradFixed); |
109 if (fCount1 > 0) { | 111 if (fCount1 > 0) { |
110 SkASSERT(fx - dx < kFracMax_SkGradFixed); | 112 SkASSERT(fx - dx < kFracMax_SkGradFixed); |
111 } | 113 } |
112 } | 114 } |
113 #endif | 115 #endif |
114 | 116 |
115 if (doSwap) { | 117 if (doSwap) { |
116 SkTSwap(fCount0, fCount2); | 118 SkTSwap(fCount0, fCount2); |
117 SkTSwap(fV0, fV1); | 119 SkTSwap(fV0, fV1); |
118 dx = -dx; | 120 dx = -dx; |
119 } | 121 } |
120 | 122 |
121 if (fCount1 > 0) { | 123 if (fCount1 > 0) { |
122 fFx1 = fx0 + fCount0 * dx; | 124 fFx1 = fx0 + fCount0 * dx; |
123 } | 125 } |
124 | |
125 if (dx > 0) { | |
126 fCount2 += extraCount; | |
127 } else { | |
128 fCount0 += extraCount; | |
129 } | |
130 } | 126 } |
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