gfx/cairo/libpixman/src/pixman-combine.h.template@b8a032363ba2
gfx/cairo/libpixman/src/pixman-combine.h.template
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
2 #define COMPONENT_SIZE
3 #define MASK
4 #define ONE_HALF
6 #define A_SHIFT
7 #define R_SHIFT
8 #define G_SHIFT
9 #define A_MASK
10 #define R_MASK
11 #define G_MASK
13 #define RB_MASK
14 #define AG_MASK
15 #define RB_ONE_HALF
16 #define RB_MASK_PLUS_ONE
18 #define ALPHA_c(x) ((x) >> A_SHIFT)
19 #define RED_c(x) (((x) >> R_SHIFT) & MASK)
20 #define GREEN_c(x) (((x) >> G_SHIFT) & MASK)
21 #define BLUE_c(x) ((x) & MASK)
23 /*
24 * Helper macros.
25 */
27 #define MUL_UNc(a, b, t) \
28 ((t) = (a) * (comp2_t)(b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
30 #define DIV_UNc(a, b) \
31 (((comp2_t) (a) * MASK + ((b) / 2)) / (b))
33 #define ADD_UNc(x, y, t) \
34 ((t) = (x) + (y), \
35 (comp4_t) (comp1_t) ((t) | (0 - ((t) >> G_SHIFT))))
37 #define DIV_ONE_UNc(x) \
38 (((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
40 /*
41 * The methods below use some tricks to be able to do two color
42 * components at the same time.
43 */
45 /*
46 * x_rb = (x_rb * a) / 255
47 */
48 #define UNc_rb_MUL_UNc(x, a, t) \
49 do \
50 { \
51 t = ((x) & RB_MASK) * (a); \
52 t += RB_ONE_HALF; \
53 x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
54 x &= RB_MASK; \
55 } while (0)
57 /*
58 * x_rb = min (x_rb + y_rb, 255)
59 */
60 #define UNc_rb_ADD_UNc_rb(x, y, t) \
61 do \
62 { \
63 t = ((x) + (y)); \
64 t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
65 x = (t & RB_MASK); \
66 } while (0)
68 /*
69 * x_rb = (x_rb * a_rb) / 255
70 */
71 #define UNc_rb_MUL_UNc_rb(x, a, t) \
72 do \
73 { \
74 t = (x & MASK) * (a & MASK); \
75 t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
76 t += RB_ONE_HALF; \
77 t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
78 x = t & RB_MASK; \
79 } while (0)
81 /*
82 * x_c = (x_c * a) / 255
83 */
84 #define UNcx4_MUL_UNc(x, a) \
85 do \
86 { \
87 comp4_t r1__, r2__, t__; \
88 \
89 r1__ = (x); \
90 UNc_rb_MUL_UNc (r1__, (a), t__); \
91 \
92 r2__ = (x) >> G_SHIFT; \
93 UNc_rb_MUL_UNc (r2__, (a), t__); \
94 \
95 (x) = r1__ | (r2__ << G_SHIFT); \
96 } while (0)
98 /*
99 * x_c = (x_c * a) / 255 + y_c
100 */
101 #define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) \
102 do \
103 { \
104 comp4_t r1__, r2__, r3__, t__; \
105 \
106 r1__ = (x); \
107 r2__ = (y) & RB_MASK; \
108 UNc_rb_MUL_UNc (r1__, (a), t__); \
109 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
110 \
111 r2__ = (x) >> G_SHIFT; \
112 r3__ = ((y) >> G_SHIFT) & RB_MASK; \
113 UNc_rb_MUL_UNc (r2__, (a), t__); \
114 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
115 \
116 (x) = r1__ | (r2__ << G_SHIFT); \
117 } while (0)
119 /*
120 * x_c = (x_c * a + y_c * b) / 255
121 */
122 #define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) \
123 do \
124 { \
125 comp4_t r1__, r2__, r3__, t__; \
126 \
127 r1__ = (x); \
128 r2__ = (y); \
129 UNc_rb_MUL_UNc (r1__, (a), t__); \
130 UNc_rb_MUL_UNc (r2__, (b), t__); \
131 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
132 \
133 r2__ = ((x) >> G_SHIFT); \
134 r3__ = ((y) >> G_SHIFT); \
135 UNc_rb_MUL_UNc (r2__, (a), t__); \
136 UNc_rb_MUL_UNc (r3__, (b), t__); \
137 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
138 \
139 (x) = r1__ | (r2__ << G_SHIFT); \
140 } while (0)
142 /*
143 * x_c = (x_c * a_c) / 255
144 */
145 #define UNcx4_MUL_UNcx4(x, a) \
146 do \
147 { \
148 comp4_t r1__, r2__, r3__, t__; \
149 \
150 r1__ = (x); \
151 r2__ = (a); \
152 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
153 \
154 r2__ = (x) >> G_SHIFT; \
155 r3__ = (a) >> G_SHIFT; \
156 UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \
157 \
158 (x) = r1__ | (r2__ << G_SHIFT); \
159 } while (0)
161 /*
162 * x_c = (x_c * a_c) / 255 + y_c
163 */
164 #define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) \
165 do \
166 { \
167 comp4_t r1__, r2__, r3__, t__; \
168 \
169 r1__ = (x); \
170 r2__ = (a); \
171 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
172 r2__ = (y) & RB_MASK; \
173 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
174 \
175 r2__ = ((x) >> G_SHIFT); \
176 r3__ = ((a) >> G_SHIFT); \
177 UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \
178 r3__ = ((y) >> G_SHIFT) & RB_MASK; \
179 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
180 \
181 (x) = r1__ | (r2__ << G_SHIFT); \
182 } while (0)
184 /*
185 * x_c = (x_c * a_c + y_c * b) / 255
186 */
187 #define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) \
188 do \
189 { \
190 comp4_t r1__, r2__, r3__, t__; \
191 \
192 r1__ = (x); \
193 r2__ = (a); \
194 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
195 r2__ = (y); \
196 UNc_rb_MUL_UNc (r2__, (b), t__); \
197 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
198 \
199 r2__ = (x) >> G_SHIFT; \
200 r3__ = (a) >> G_SHIFT; \
201 UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \
202 r3__ = (y) >> G_SHIFT; \
203 UNc_rb_MUL_UNc (r3__, (b), t__); \
204 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
205 \
206 x = r1__ | (r2__ << G_SHIFT); \
207 } while (0)
209 /*
210 x_c = min(x_c + y_c, 255)
211 */
212 #define UNcx4_ADD_UNcx4(x, y) \
213 do \
214 { \
215 comp4_t r1__, r2__, r3__, t__; \
216 \
217 r1__ = (x) & RB_MASK; \
218 r2__ = (y) & RB_MASK; \
219 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
220 \
221 r2__ = ((x) >> G_SHIFT) & RB_MASK; \
222 r3__ = ((y) >> G_SHIFT) & RB_MASK; \
223 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
224 \
225 x = r1__ | (r2__ << G_SHIFT); \
226 } while (0)
