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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 |
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42 If this is not null, the values must begin with 0, end w
ith 1.0, and | 42 If this is not null, the values must begin with 0, end w
ith 1.0, and |
43 intermediate values must be strictly increasing. | 43 intermediate values must be strictly increasing. |
44 @param count Must be >=2. The number of colors (and pos if not NULL)
entries. | 44 @param count Must be >=2. The number of colors (and pos if not NULL)
entries. |
45 @param mode The tiling mode | 45 @param mode The tiling mode |
46 @param mapper May be NULL. Callback to modify the spread of the colors
. | 46 @param mapper May be NULL. Callback to modify the spread of the colors
. |
47 */ | 47 */ |
48 static SkShader* CreateLinear(const SkPoint pts[2], | 48 static SkShader* CreateLinear(const SkPoint pts[2], |
49 const SkColor colors[], const SkScalar pos[],
int count, | 49 const SkColor colors[], const SkScalar pos[],
int count, |
50 SkShader::TileMode mode, | 50 SkShader::TileMode mode, |
51 SkUnitMapper* mapper = NULL, | 51 SkUnitMapper* mapper = NULL, |
52 uint32_t flags = 0); | 52 uint32_t flags = 0, |
| 53 const SkMatrix* localMatrix = NULL); |
53 | 54 |
54 /** Returns a shader that generates a radial gradient given the center and r
adius. | 55 /** Returns a shader that generates a radial gradient given the center and r
adius. |
55 <p /> | 56 <p /> |
56 CreateRadial returns a shader with a reference count of 1. | 57 CreateRadial returns a shader with a reference count of 1. |
57 The caller should decrement the shader's reference count when done with
the shader. | 58 The caller should decrement the shader's reference count when done with
the shader. |
58 It is an error for colorCount to be < 2, or for radius to be <= 0. | 59 It is an error for colorCount to be < 2, or for radius to be <= 0. |
59 @param center The center of the circle for this gradient | 60 @param center The center of the circle for this gradient |
60 @param radius Must be positive. The radius of the circle for this grad
ient | 61 @param radius Must be positive. The radius of the circle for this grad
ient |
61 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle | 62 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle |
62 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of | 63 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of |
63 each corresponding color in the colors array. If this is
NULL, | 64 each corresponding color in the colors array. If this is
NULL, |
64 the the colors are distributed evenly between the center
and edge of the circle. | 65 the the colors are distributed evenly between the center
and edge of the circle. |
65 If this is not null, the values must begin with 0, end w
ith 1.0, and | 66 If this is not null, the values must begin with 0, end w
ith 1.0, and |
66 intermediate values must be strictly increasing. | 67 intermediate values must be strictly increasing. |
67 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries | 68 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries |
68 @param mode The tiling mode | 69 @param mode The tiling mode |
69 @param mapper May be NULL. Callback to modify the spread of the colors
. | 70 @param mapper May be NULL. Callback to modify the spread of the colors
. |
70 */ | 71 */ |
71 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, | 72 static SkShader* CreateRadial(const SkPoint& center, SkScalar radius, |
72 const SkColor colors[], const SkScalar pos[],
int count, | 73 const SkColor colors[], const SkScalar pos[],
int count, |
73 SkShader::TileMode mode, | 74 SkShader::TileMode mode, |
74 SkUnitMapper* mapper = NULL, | 75 SkUnitMapper* mapper = NULL, |
75 uint32_t flags = 0); | 76 uint32_t flags = 0, |
| 77 const SkMatrix* localMatrix = NULL); |
76 | 78 |
77 /** Returns a shader that generates a radial gradient given the start positi
on, start radius, end position and end radius. | 79 /** Returns a shader that generates a radial gradient given the start positi
on, start radius, end position and end radius. |
78 <p /> | 80 <p /> |
79 CreateTwoPointRadial returns a shader with a reference count of 1. | 81 CreateTwoPointRadial returns a shader with a reference count of 1. |
80 The caller should decrement the shader's reference count when done with
the shader. | 82 The caller should decrement the shader's reference count when done with
the shader. |
81 It is an error for colorCount to be < 2, for startRadius or endRadius to
be < 0, or for | 83 It is an error for colorCount to be < 2, for startRadius or endRadius to
be < 0, or for |
82 startRadius to be equal to endRadius. | 84 startRadius to be equal to endRadius. |
83 @param start The center of the start circle for this gradient | 85 @param start The center of the start circle for this gradient |
84 @param startRadius Must be positive. The radius of the start circle f
or this gradient. | 86 @param startRadius Must be positive. The radius of the start circle f
or this gradient. |
85 @param end The center of the end circle for this gradient | 87 @param end The center of the end circle for this gradient |
86 @param endRadius Must be positive. The radius of the end circle for th
is gradient. | 88 @param endRadius Must be positive. The radius of the end circle for th
is gradient. |
87 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle | 89 @param colors The array[count] of colors, to be distributed between th
e center and edge of the circle |
88 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of | 90 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of |
89 each corresponding color in the colors array. If this is
NULL, | 91 each corresponding color in the colors array. If this is
NULL, |
90 the the colors are distributed evenly between the center
and edge of the circle. | 92 the the colors are distributed evenly between the center
and edge of the circle. |
91 If this is not null, the values must begin with 0, end w
ith 1.0, and | 93 If this is not null, the values must begin with 0, end w
ith 1.0, and |
92 intermediate values must be strictly increasing. | 94 intermediate values must be strictly increasing. |
93 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries | 95 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries |
94 @param mode The tiling mode | 96 @param mode The tiling mode |
95 @param mapper May be NULL. Callback to modify the spread of the colors
. | 97 @param mapper May be NULL. Callback to modify the spread of the colors
. |
96 */ | 98 */ |
97 static SkShader* CreateTwoPointRadial(const SkPoint& start, | 99 static SkShader* CreateTwoPointRadial(const SkPoint& start, |
98 SkScalar startRadius, | 100 SkScalar startRadius, |
99 const SkPoint& end, | 101 const SkPoint& end, |
100 SkScalar endRadius, | 102 SkScalar endRadius, |
101 const SkColor colors[], | 103 const SkColor colors[], |
102 const SkScalar pos[], int count, | 104 const SkScalar pos[], int count, |
103 SkShader::TileMode mode, | 105 SkShader::TileMode mode, |
104 SkUnitMapper* mapper = NULL, | 106 SkUnitMapper* mapper = NULL, |
105 uint32_t flags = 0); | 107 uint32_t flags = 0, |
| 108 const SkMatrix* localMatrix = NULL); |
106 | 109 |
107 /** | 110 /** |
108 * Returns a shader that generates a conical gradient given two circles, or | 111 * Returns a shader that generates a conical gradient given two circles, or |
109 * returns NULL if the inputs are invalid. The gradient interprets the | 112 * returns NULL if the inputs are invalid. The gradient interprets the |
110 * two circles according to the following HTML spec. | 113 * two circles according to the following HTML spec. |
111 * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient | 114 * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient |
112 */ | 115 */ |
113 static SkShader* CreateTwoPointConical(const SkPoint& start, | 116 static SkShader* CreateTwoPointConical(const SkPoint& start, |
114 SkScalar startRadius, | 117 SkScalar startRadius, |
115 const SkPoint& end, | 118 const SkPoint& end, |
116 SkScalar endRadius, | 119 SkScalar endRadius, |
117 const SkColor colors[], | 120 const SkColor colors[], |
118 const SkScalar pos[], int count, | 121 const SkScalar pos[], int count, |
119 SkShader::TileMode mode, | 122 SkShader::TileMode mode, |
120 SkUnitMapper* mapper = NULL, | 123 SkUnitMapper* mapper = NULL, |
121 uint32_t flags = 0); | 124 uint32_t flags = 0, |
| 125 const SkMatrix* localMatrix = NULL); |
122 | 126 |
123 /** Returns a shader that generates a sweep gradient given a center. | 127 /** Returns a shader that generates a sweep gradient given a center. |
124 <p /> | 128 <p /> |
125 CreateSweep returns a shader with a reference count of 1. | 129 CreateSweep returns a shader with a reference count of 1. |
126 The caller should decrement the shader's reference count when done with
the shader. | 130 The caller should decrement the shader's reference count when done with
the shader. |
127 It is an error for colorCount to be < 2. | 131 It is an error for colorCount to be < 2. |
128 @param cx The X coordinate of the center of the sweep | 132 @param cx The X coordinate of the center of the sweep |
129 @param cx The Y coordinate of the center of the sweep | 133 @param cx The Y coordinate of the center of the sweep |
130 @param colors The array[count] of colors, to be distributed around the
center. | 134 @param colors The array[count] of colors, to be distributed around the
center. |
131 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of | 135 @param pos May be NULL. The array[count] of SkScalars, or NULL, of
the relative position of |
132 each corresponding color in the colors array. If this is
NULL, | 136 each corresponding color in the colors array. If this is
NULL, |
133 the the colors are distributed evenly between the center
and edge of the circle. | 137 the the colors are distributed evenly between the center
and edge of the circle. |
134 If this is not null, the values must begin with 0, end w
ith 1.0, and | 138 If this is not null, the values must begin with 0, end w
ith 1.0, and |
135 intermediate values must be strictly increasing. | 139 intermediate values must be strictly increasing. |
136 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries | 140 @param count Must be >= 2. The number of colors (and pos if not NULL)
entries |
137 @param mapper May be NULL. Callback to modify the spread of the colors
. | 141 @param mapper May be NULL. Callback to modify the spread of the colors
. |
138 */ | 142 */ |
139 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, | 143 static SkShader* CreateSweep(SkScalar cx, SkScalar cy, |
140 const SkColor colors[], const SkScalar pos[], | 144 const SkColor colors[], const SkScalar pos[], |
141 int count, SkUnitMapper* mapper = NULL, | 145 int count, SkUnitMapper* mapper = NULL, |
142 uint32_t flags = 0); | 146 uint32_t flags = 0, |
| 147 const SkMatrix* localMatrix = NULL); |
143 | 148 |
144 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() | 149 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
145 }; | 150 }; |
146 | 151 |
147 #endif | 152 #endif |
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