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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 #ifndef SkGradientShader_DEFINED | 8 #ifndef SkGradientShader_DEFINED |
| 9 #define SkGradientShader_DEFINED | 9 #define SkGradientShader_DEFINED |
| 10 | 10 |
| (...skipping 35 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 46 const SkColor colors[], const SkScalar pos[],
int count, | 46 const SkColor colors[], const SkScalar pos[],
int count, |
| 47 SkShader::TileMode mode, | 47 SkShader::TileMode mode, |
| 48 uint32_t flags, const SkMatrix* localMatrix); | 48 uint32_t flags, const SkMatrix* localMatrix); |
| 49 | 49 |
| 50 static SkShader* CreateLinear(const SkPoint pts[2], | 50 static SkShader* CreateLinear(const SkPoint pts[2], |
| 51 const SkColor colors[], const SkScalar pos[],
int count, | 51 const SkColor colors[], const SkScalar pos[],
int count, |
| 52 SkShader::TileMode mode) { | 52 SkShader::TileMode mode) { |
| 53 return CreateLinear(pts, colors, pos, count, mode, 0, NULL); | 53 return CreateLinear(pts, colors, pos, count, mode, 0, NULL); |
| 54 } | 54 } |
| 55 | 55 |
| 56 #ifdef SK_SUPPORT_LEGACY_GRADIENT_FACTORIES | |
| 57 static SkShader* CreateLinear(const SkPoint pts[2], | |
| 58 const SkColor colors[], const SkScalar pos[],
int count, | |
| 59 SkShader::TileMode mode, void* /*ignored*/, | |
| 60 uint32_t flags, const SkMatrix* localMatrix) { | |
| 61 return CreateLinear(pts, colors, pos, count, mode, flags, localMatrix); | |
| 62 } | |
| 63 #endif | |
| 64 | |
| 65 /** Returns a shader that generates a radial gradient given the center and r
adius. | 56 /** Returns a shader that generates a radial gradient given the center and r
adius. |
| 66 <p /> | 57 <p /> |
| 67 CreateRadial returns a shader with a reference count of 1. | 58 CreateRadial returns a shader with a reference count of 1. |
| 68 The caller should decrement the shader's reference count when done with
the shader. | 59 The caller should decrement the shader's reference count when done with
the shader. |
| 69 It is an error for colorCount to be < 2, or for radius to be <= 0. | 60 It is an error for colorCount to be < 2, or for radius to be <= 0. |
| 70 @param center The center of the circle for this gradient | 61 @param center The center of the circle for this gradient |
| 71 @param radius Must be positive. The radius of the circle for this grad
ient | 62 @param radius Must be positive. The radius of the circle for this grad
ient |
| 72 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle | 63 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle |
| 73 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of | 64 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of |
| 74 each corresponding color in the colors array. If this is
NULL, | 65 each corresponding color in the colors array. If this is
NULL, |
| 75 the the colors are distributed evenly between the center
and edge of the circle. | 66 the the colors are distributed evenly between the center
and edge of the circle. |
| 76 If this is not null, the values must begin with 0, end w
ith 1.0, and | 67 If this is not null, the values must begin with 0, end w
ith 1.0, and |
| 77 intermediate values must be strictly increasing. | 68 intermediate values must be strictly increasing. |
| 78 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries | 69 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries |
| 79 @param mode The tiling mode | 70 @param mode The tiling mode |
| 80 */ | 71 */ |
| 81 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, | 72 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, |
| 82 const SkColor colors[], const SkScalar pos[],
int count, | 73 const SkColor colors[], const SkScalar pos[],
int count, |
| 83 SkShader::TileMode mode, | 74 SkShader::TileMode mode, |
| 84 uint32_t flags, const SkMatrix* localMatrix); | 75 uint32_t flags, const SkMatrix* localMatrix); |
| 85 | 76 |
| 86 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, | 77 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, |
| 87 const SkColor colors[], const SkScalar pos[],
int count, | 78 const SkColor colors[], const SkScalar pos[],
int count, |
| 88 SkShader::TileMode mode) { | 79 SkShader::TileMode mode) { |
| 89 return CreateRadial(center, radius, colors, pos, count, mode, 0, NULL); | 80 return CreateRadial(center, radius, colors, pos, count, mode, 0, NULL); |
| 90 } | 81 } |
| 91 | 82 |
| 92 #ifdef SK_SUPPORT_LEGACY_GRADIENT_FACTORIES | |
| 93 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, | |
| 94 const SkColor colors[], const SkScalar pos[],
int count, | |
| 95 SkShader::TileMode mode, void* /*ignored*/, | |
| 96 uint32_t flags, const SkMatrix* localMatrix) { | |
| 97 return CreateRadial(center, radius, colors, pos, count, mode, flags, loc
alMatrix); | |
| 98 } | |
| 99 #endif | |
| 100 | |
| 101 /** Returns a shader that generates a radial gradient given the start positi
on, start radius, end position and end radius. | 83 /** Returns a shader that generates a radial gradient given the start positi
on, start radius, end position and end radius. |
| 102 <p /> | 84 <p /> |
| 103 CreateTwoPointRadial returns a shader with a reference count of 1. | 85 CreateTwoPointRadial returns a shader with a reference count of 1. |
| 104 The caller should decrement the shader's reference count when done with
the shader. | 86 The caller should decrement the shader's reference count when done with
the shader. |
| 105 It is an error for colorCount to be < 2, for startRadius or endRadius to
be < 0, or for | 87 It is an error for colorCount to be < 2, for startRadius or endRadius to
be < 0, or for |
| 106 startRadius to be equal to endRadius. | 88 startRadius to be equal to endRadius. |
| 107 @param start The center of the start circle for this gradient | 89 @param start The center of the start circle for this gradient |
| 108 @param startRadius Must be positive. The radius of the start circle f
or this gradient. | 90 @param startRadius Must be positive. The radius of the start circle f
or this gradient. |
| 109 @param end The center of the end circle for this gradient | 91 @param end The center of the end circle for this gradient |
| 110 @param endRadius Must be positive. The radius of the end circle for th
is gradient. | 92 @param endRadius Must be positive. The radius of the end circle for th
is gradient. |
| (...skipping 13 matching lines...) Expand all Loading... |
| 124 uint32_t flags, const SkMatrix* localM
atrix); | 106 uint32_t flags, const SkMatrix* localM
atrix); |
| 125 | 107 |
| 126 static SkShader* CreateTwoPointRadial(const SkPoint& start, SkScalar startRa
dius, | 108 static SkShader* CreateTwoPointRadial(const SkPoint& start, SkScalar startRa
dius, |
| 127 const SkPoint& end, SkScalar endRadius
, | 109 const SkPoint& end, SkScalar endRadius
, |
| 128 const SkColor colors[], const SkScalar
pos[], int count, | 110 const SkColor colors[], const SkScalar
pos[], int count, |
| 129 SkShader::TileMode mode) { | 111 SkShader::TileMode mode) { |
| 130 return CreateTwoPointRadial(start, startRadius, end, endRadius, colors,
pos, count, mode, | 112 return CreateTwoPointRadial(start, startRadius, end, endRadius, colors,
pos, count, mode, |
| 131 0, NULL); | 113 0, NULL); |
| 132 } | 114 } |
| 133 | 115 |
| 134 #ifdef SK_SUPPORT_LEGACY_GRADIENT_FACTORIES | |
| 135 static SkShader* CreateTwoPointRadial(const SkPoint& start, SkScalar startRa
dius, | |
| 136 const SkPoint& end, SkScalar endRadius
, | |
| 137 const SkColor colors[], const SkScalar
pos[], int count, | |
| 138 SkShader::TileMode mode, void* /*ignor
ed*/, | |
| 139 uint32_t flags, const SkMatrix* localM
atrix) { | |
| 140 return CreateTwoPointRadial(start, startRadius, end, endRadius, colors,
pos, count, mode, | |
| 141 flags, localMatrix); | |
| 142 } | |
| 143 #endif | |
| 144 | |
| 145 /** | 116 /** |
| 146 * Returns a shader that generates a conical gradient given two circles, or | 117 * Returns a shader that generates a conical gradient given two circles, or |
| 147 * returns NULL if the inputs are invalid. The gradient interprets the | 118 * returns NULL if the inputs are invalid. The gradient interprets the |
| 148 * two circles according to the following HTML spec. | 119 * two circles according to the following HTML spec. |
| 149 * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient | 120 * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient |
| 150 */ | 121 */ |
| 151 static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startR
adius, | 122 static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startR
adius, |
| 152 const SkPoint& end, SkScalar endRadiu
s, | 123 const SkPoint& end, SkScalar endRadiu
s, |
| 153 const SkColor colors[], const SkScala
r pos[], int count, | 124 const SkColor colors[], const SkScala
r pos[], int count, |
| 154 SkShader::TileMode mode, | 125 SkShader::TileMode mode, |
| 155 uint32_t flags, const SkMatrix* local
Matrix); | 126 uint32_t flags, const SkMatrix* local
Matrix); |
| 156 | 127 |
| 157 static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startR
adius, | 128 static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startR
adius, |
| 158 const SkPoint& end, SkScalar endRadiu
s, | 129 const SkPoint& end, SkScalar endRadiu
s, |
| 159 const SkColor colors[], const SkScala
r pos[], int count, | 130 const SkColor colors[], const SkScala
r pos[], int count, |
| 160 SkShader::TileMode mode) { | 131 SkShader::TileMode mode) { |
| 161 return CreateTwoPointConical(start, startRadius, end, endRadius, colors,
pos, count, mode, | 132 return CreateTwoPointConical(start, startRadius, end, endRadius, colors,
pos, count, mode, |
| 162 0, NULL); | 133 0, NULL); |
| 163 } | 134 } |
| 164 | 135 |
| 165 #ifdef SK_SUPPORT_LEGACY_GRADIENT_FACTORIES | |
| 166 static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startR
adius, | |
| 167 const SkPoint& end, SkScalar endRadiu
s, | |
| 168 const SkColor colors[], const SkScala
r pos[], int count, | |
| 169 SkShader::TileMode mode, void* /*igno
red*/, | |
| 170 uint32_t flags, const SkMatrix* local
Matrix) { | |
| 171 return CreateTwoPointConical(start, startRadius, end, endRadius, colors,
pos, count, mode, | |
| 172 flags, localMatrix); | |
| 173 } | |
| 174 #endif | |
| 175 | |
| 176 /** Returns a shader that generates a sweep gradient given a center. | 136 /** Returns a shader that generates a sweep gradient given a center. |
| 177 <p /> | 137 <p /> |
| 178 CreateSweep returns a shader with a reference count of 1. | 138 CreateSweep returns a shader with a reference count of 1. |
| 179 The caller should decrement the shader's reference count when done with
the shader. | 139 The caller should decrement the shader's reference count when done with
the shader. |
| 180 It is an error for colorCount to be < 2. | 140 It is an error for colorCount to be < 2. |
| 181 @param cx The X coordinate of the center of the sweep | 141 @param cx The X coordinate of the center of the sweep |
| 182 @param cx The Y coordinate of the center of the sweep | 142 @param cx The Y coordinate of the center of the sweep |
| 183 @param colors The array[count] of colors, to be distributed around the
center. | 143 @param colors The array[count] of colors, to be distributed around the
center. |
| 184 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of | 144 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of |
| 185 each corresponding color in the colors array. If this is
NULL, | 145 each corresponding color in the colors array. If this is
NULL, |
| 186 the the colors are distributed evenly between the center
and edge of the circle. | 146 the the colors are distributed evenly between the center
and edge of the circle. |
| 187 If this is not null, the values must begin with 0, end w
ith 1.0, and | 147 If this is not null, the values must begin with 0, end w
ith 1.0, and |
| 188 intermediate values must be strictly increasing. | 148 intermediate values must be strictly increasing. |
| 189 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries | 149 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries |
| 190 */ | 150 */ |
| 191 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, | 151 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, |
| 192 const SkColor colors[], const SkScalar pos[], i
nt count, | 152 const SkColor colors[], const SkScalar pos[], i
nt count, |
| 193 uint32_t flags, const SkMatrix* localMatrix); | 153 uint32_t flags, const SkMatrix* localMatrix); |
| 194 | 154 |
| 195 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, | 155 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, |
| 196 const SkColor colors[], const SkScalar pos[], i
nt count) { | 156 const SkColor colors[], const SkScalar pos[], i
nt count) { |
| 197 return CreateSweep(cx, cy, colors, pos, count, 0, NULL); | 157 return CreateSweep(cx, cy, colors, pos, count, 0, NULL); |
| 198 } | 158 } |
| 199 | 159 |
| 200 #ifdef SK_SUPPORT_LEGACY_GRADIENT_FACTORIES | |
| 201 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, | |
| 202 const SkColor colors[], const SkScalar pos[], i
nt count, | |
| 203 void* /*ignored*/, | |
| 204 uint32_t flags, const SkMatrix* localMatrix) { | |
| 205 return CreateSweep(cx, cy, colors, pos, count, flags, localMatrix); | |
| 206 } | |
| 207 #endif | |
| 208 | |
| 209 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() | 160 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
| 210 }; | 161 }; |
| 211 | 162 |
| 212 #endif | 163 #endif |
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