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)
27 #define MUL_UNc(a, b, t) \
28 ((t) = (a) * (b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
30 #define DIV_UNc(a, b) \
31 (((comp2_t) (a) * MASK) / (b))
33 #define ADD_UNc(x, y, t) \
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)
41 * The methods below use some tricks to be able to do two color
42 * components at the same time.
46 * x_rb = (x_rb * a) / 255
48 #define UNc_rb_MUL_UNc(x, a, t) \
51 t = ((x) & RB_MASK) * (a); \
53 x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
58 * x_rb = min (x_rb + y_rb, 255)
60 #define UNc_rb_ADD_UNc_rb(x, y, t) \
64 t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
69 * x_rb = (x_rb * a_rb) / 255
71 #define UNc_rb_MUL_UNc_rb(x, a, t) \
74 t = (x & MASK) * (a & MASK); \
75 t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
77 t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
82 * x_c = (x_c * a) / 255
84 #define UNcx4_MUL_UNc(x, a) \
87 comp4_t r1__, r2__, t__; \
90 UNc_rb_MUL_UNc (r1__, (a), t__); \
92 r2__ = (x) >> G_SHIFT; \
93 UNc_rb_MUL_UNc (r2__, (a), t__); \
95 (x) = r1__ | (r2__ << G_SHIFT); \
99 * x_c = (x_c * a) / 255 + y_c
101 #define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) \
104 comp4_t r1__, r2__, r3__, t__; \
107 r2__ = (y) & RB_MASK; \
108 UNc_rb_MUL_UNc (r1__, (a), t__); \
109 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
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__); \
116 (x) = r1__ | (r2__ << G_SHIFT); \
120 * x_c = (x_c * a + y_c * b) / 255
122 #define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) \
125 comp4_t r1__, r2__, r3__, t__; \
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__); \
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__); \
139 (x) = r1__ | (r2__ << G_SHIFT); \
143 * x_c = (x_c * a_c) / 255
145 #define UNcx4_MUL_UNcx4(x, a) \
148 comp4_t r1__, r2__, r3__, t__; \
152 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
154 r2__ = (x) >> G_SHIFT; \
155 r3__ = (a) >> G_SHIFT; \
156 UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \
158 (x) = r1__ | (r2__ << G_SHIFT); \
162 * x_c = (x_c * a_c) / 255 + y_c
164 #define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) \
167 comp4_t r1__, r2__, r3__, t__; \
171 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
172 r2__ = (y) & RB_MASK; \
173 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
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__); \
181 (x) = r1__ | (r2__ << G_SHIFT); \
185 * x_c = (x_c * a_c + y_c * b) / 255
187 #define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) \
190 comp4_t r1__, r2__, r3__, t__; \
194 UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \
196 UNc_rb_MUL_UNc (r2__, (b), t__); \
197 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
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__); \
206 x = r1__ | (r2__ << G_SHIFT); \
210 x_c = min(x_c + y_c, 255)
212 #define UNcx4_ADD_UNcx4(x, y) \
215 comp4_t r1__, r2__, r3__, t__; \
217 r1__ = (x) & RB_MASK; \
218 r2__ = (y) & RB_MASK; \
219 UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \
221 r2__ = ((x) >> G_SHIFT) & RB_MASK; \
222 r3__ = ((y) >> G_SHIFT) & RB_MASK; \
223 UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \
225 x = r1__ | (r2__ << G_SHIFT); \