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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 "SkColorFilter.h" | 8 #include "SkColorFilter.h" |
9 #include "SkFilterShader.h" | 9 |
10 #include "SkFlattenableBuffers.h" | 10 #include "SkFlattenableBuffers.h" |
11 #include "SkShader.h" | 11 #include "SkShader.h" |
12 #include "SkUnPreMultiply.h" | 12 #include "SkUnPreMultiply.h" |
13 #include "SkString.h" | 13 #include "SkString.h" |
14 | 14 |
15 SK_DEFINE_INST_COUNT(SkColorFilter) | 15 SK_DEFINE_INST_COUNT(SkColorFilter) |
16 | 16 |
17 bool SkColorFilter::asColorMode(SkColor* color, SkXfermode::Mode* mode) const { | 17 bool SkColorFilter::asColorMode(SkColor* color, SkXfermode::Mode* mode) const { |
18 return false; | 18 return false; |
19 } | 19 } |
(...skipping 17 matching lines...) Expand all Loading... |
37 | 37 |
38 SkColor SkColorFilter::filterColor(SkColor c) const { | 38 SkColor SkColorFilter::filterColor(SkColor c) const { |
39 SkPMColor dst, src = SkPreMultiplyColor(c); | 39 SkPMColor dst, src = SkPreMultiplyColor(c); |
40 this->filterSpan(&src, 1, &dst); | 40 this->filterSpan(&src, 1, &dst); |
41 return SkUnPreMultiply::PMColorToColor(dst); | 41 return SkUnPreMultiply::PMColorToColor(dst); |
42 } | 42 } |
43 | 43 |
44 GrEffectRef* SkColorFilter::asNewEffect(GrContext*) const { | 44 GrEffectRef* SkColorFilter::asNewEffect(GrContext*) const { |
45 return NULL; | 45 return NULL; |
46 } | 46 } |
47 | |
48 /////////////////////////////////////////////////////////////////////////////// | |
49 | |
50 SkFilterShader::SkFilterShader(SkShader* shader, SkColorFilter* filter) { | |
51 fShader = shader; shader->ref(); | |
52 fFilter = filter; filter->ref(); | |
53 } | |
54 | |
55 SkFilterShader::SkFilterShader(SkFlattenableReadBuffer& buffer) : | |
56 INHERITED(buffer) { | |
57 fShader = buffer.readFlattenableT<SkShader>(); | |
58 fFilter = buffer.readFlattenableT<SkColorFilter>(); | |
59 } | |
60 | |
61 SkFilterShader::~SkFilterShader() { | |
62 fFilter->unref(); | |
63 fShader->unref(); | |
64 } | |
65 | |
66 void SkFilterShader::flatten(SkFlattenableWriteBuffer& buffer) const { | |
67 this->INHERITED::flatten(buffer); | |
68 buffer.writeFlattenable(fShader); | |
69 buffer.writeFlattenable(fFilter); | |
70 } | |
71 | |
72 uint32_t SkFilterShader::getFlags() { | |
73 uint32_t shaderF = fShader->getFlags(); | |
74 uint32_t filterF = fFilter->getFlags(); | |
75 | |
76 // if the filter doesn't support 16bit, clear the matching bit in the shader | |
77 if (!(filterF & SkColorFilter::kHasFilter16_Flag)) { | |
78 shaderF &= ~SkShader::kHasSpan16_Flag; | |
79 } | |
80 // if the filter might change alpha, clear the opaque flag in the shader | |
81 if (!(filterF & SkColorFilter::kAlphaUnchanged_Flag)) { | |
82 shaderF &= ~(SkShader::kOpaqueAlpha_Flag | SkShader::kHasSpan16_Flag); | |
83 } | |
84 return shaderF; | |
85 } | |
86 | |
87 bool SkFilterShader::setContext(const SkBitmap& device, | |
88 const SkPaint& paint, | |
89 const SkMatrix& matrix) { | |
90 // we need to keep the setContext/endContext calls balanced. If we return | |
91 // false, our endContext() will not be called. | |
92 | |
93 if (!this->INHERITED::setContext(device, paint, matrix)) { | |
94 return false; | |
95 } | |
96 if (!fShader->setContext(device, paint, matrix)) { | |
97 this->INHERITED::endContext(); | |
98 return false; | |
99 } | |
100 return true; | |
101 } | |
102 | |
103 void SkFilterShader::endContext() { | |
104 fShader->endContext(); | |
105 this->INHERITED::endContext(); | |
106 } | |
107 | |
108 void SkFilterShader::shadeSpan(int x, int y, SkPMColor result[], int count) { | |
109 fShader->shadeSpan(x, y, result, count); | |
110 fFilter->filterSpan(result, count, result); | |
111 } | |
112 | |
113 void SkFilterShader::shadeSpan16(int x, int y, uint16_t result[], int count) { | |
114 SkASSERT(fShader->getFlags() & SkShader::kHasSpan16_Flag); | |
115 SkASSERT(fFilter->getFlags() & SkColorFilter::kHasFilter16_Flag); | |
116 | |
117 fShader->shadeSpan16(x, y, result, count); | |
118 fFilter->filterSpan16(result, count, result); | |
119 } | |
120 | |
121 #ifdef SK_DEVELOPER | |
122 void SkFilterShader::toString(SkString* str) const { | |
123 str->append("SkFilterShader: ("); | |
124 | |
125 str->append("Shader: "); | |
126 fShader->toString(str); | |
127 str->append(" Filter: "); | |
128 // TODO: add "fFilter->toString(str);" once SkColorFilter::toString is added | |
129 | |
130 this->INHERITED::toString(str); | |
131 | |
132 str->append(")"); | |
133 } | |
134 #endif | |
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