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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 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 #ifndef Sk4fGradientPriv_DEFINED | 8 #ifndef Sk4fGradientPriv_DEFINED |
9 #define Sk4fGradientPriv_DEFINED | 9 #define Sk4fGradientPriv_DEFINED |
10 | 10 |
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101 store(c3, dst + 3); | 101 store(c3, dst + 3); |
102 } | 102 } |
103 } | 103 } |
104 }; | 104 }; |
105 | 105 |
106 template <ApplyPremul premul> | 106 template <ApplyPremul premul> |
107 struct DstTraits<DstType::S32, premul> { | 107 struct DstTraits<DstType::S32, premul> { |
108 using PM = PremulTraits<premul>; | 108 using PM = PremulTraits<premul>; |
109 using Type = SkPMColor; | 109 using Type = SkPMColor; |
110 | 110 |
111 // TODO: prescale by something like (255^2, 255^2, 255^2, 255) and use | |
112 // linear_to_srgb to save a mult in store? | |
113 static Sk4f load(const SkPM4f& c) { | 111 static Sk4f load(const SkPM4f& c) { |
114 return c.to4f_pmorder(); | 112 // Prescaling by (255^2, 255^2, 255^2, 255) on load, to avoid a 255 mult
iply on |
| 113 // each store (S32 conversion yields a uniform 255 factor). |
| 114 return c.to4f_pmorder() * Sk4f(255 * 255, 255 * 255, 255 * 255, 255); |
115 } | 115 } |
116 | 116 |
117 static void store(const Sk4f& c, Type* dst) { | 117 static void store(const Sk4f& c, Type* dst) { |
118 // FIXME: this assumes opaque colors. Handle unpremultiplication. | 118 // FIXME: this assumes opaque colors. Handle unpremultiplication. |
119 *dst = Sk4f_toS32(PM::apply(c)); | 119 *dst = to_4b(linear_to_srgb(PM::apply(c))); |
120 } | 120 } |
121 | 121 |
122 static void store(const Sk4f& c, Type* dst, int n) { | 122 static void store(const Sk4f& c, Type* dst, int n) { |
123 sk_memset32(dst, Sk4f_toS32(PM::apply(c)), n); | 123 sk_memset32(dst, to_4b(linear_to_srgb(PM::apply(c))), n); |
124 } | 124 } |
125 | 125 |
126 static void store4x(const Sk4f& c0, const Sk4f& c1, | 126 static void store4x(const Sk4f& c0, const Sk4f& c1, |
127 const Sk4f& c2, const Sk4f& c3, | 127 const Sk4f& c2, const Sk4f& c3, |
128 Type* dst) { | 128 Type* dst) { |
129 store(c0, dst + 0); | 129 store(c0, dst + 0); |
130 store(c1, dst + 1); | 130 store(c1, dst + 1); |
131 store(c2, dst + 2); | 131 store(c2, dst + 2); |
132 store(c3, dst + 3); | 132 store(c3, dst + 3); |
133 } | 133 } |
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186 store(c0, dst + 0); | 186 store(c0, dst + 0); |
187 store(c1, dst + 1); | 187 store(c1, dst + 1); |
188 store(c2, dst + 2); | 188 store(c2, dst + 2); |
189 store(c3, dst + 3); | 189 store(c3, dst + 3); |
190 } | 190 } |
191 }; | 191 }; |
192 | 192 |
193 } // anonymous namespace | 193 } // anonymous namespace |
194 | 194 |
195 #endif // Sk4fGradientPriv_DEFINED | 195 #endif // Sk4fGradientPriv_DEFINED |
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