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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 "SkTableMaskFilter.h" | 10 #include "SkTableMaskFilter.h" |
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| 84 | 84 |
| 85 /////////////////////////////////////////////////////////////////////////////// | 85 /////////////////////////////////////////////////////////////////////////////// |
| 86 | 86 |
| 87 void SkTableMaskFilter::MakeGammaTable(uint8_t table[256], SkScalar gamma) { | 87 void SkTableMaskFilter::MakeGammaTable(uint8_t table[256], SkScalar gamma) { |
| 88 const float dx = 1 / 255.0f; | 88 const float dx = 1 / 255.0f; |
| 89 const float g = SkScalarToFloat(gamma); | 89 const float g = SkScalarToFloat(gamma); |
| 90 | 90 |
| 91 float x = 0; | 91 float x = 0; |
| 92 for (int i = 0; i < 256; i++) { | 92 for (int i = 0; i < 256; i++) { |
| 93 // float ee = powf(x, g) * 255; | 93 // float ee = powf(x, g) * 255; |
| 94 table[i] = SkPin32(sk_float_round2int(powf(x, g) * 255), 0, 255); | 94 table[i] = SkTPin(sk_float_round2int(powf(x, g) * 255), 0, 255); |
| 95 x += dx; | 95 x += dx; |
| 96 } | 96 } |
| 97 } | 97 } |
| 98 | 98 |
| 99 void SkTableMaskFilter::MakeClipTable(uint8_t table[256], uint8_t min, | 99 void SkTableMaskFilter::MakeClipTable(uint8_t table[256], uint8_t min, |
| 100 uint8_t max) { | 100 uint8_t max) { |
| 101 if (0 == max) { | 101 if (0 == max) { |
| 102 max = 1; | 102 max = 1; |
| 103 } | 103 } |
| 104 if (min >= max) { | 104 if (min >= max) { |
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| 136 | 136 |
| 137 str->append("table: "); | 137 str->append("table: "); |
| 138 for (int i = 0; i < 255; ++i) { | 138 for (int i = 0; i < 255; ++i) { |
| 139 str->appendf("%d, ", fTable[i]); | 139 str->appendf("%d, ", fTable[i]); |
| 140 } | 140 } |
| 141 str->appendf("%d", fTable[255]); | 141 str->appendf("%d", fTable[255]); |
| 142 | 142 |
| 143 str->append(")"); | 143 str->append(")"); |
| 144 } | 144 } |
| 145 #endif | 145 #endif |
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