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#define COMPONENT_SIZE
#define MASK
#define ONE_HALF
#define A_SHIFT
#define R_SHIFT
#define G_SHIFT
#define A_MASK
#define R_MASK
#define G_MASK
#define RB_MASK
#define AG_MASK
#define RB_ONE_HALF
#define RB_MASK_PLUS_ONE
#define ALPHA_c(x) ((x) >> A_SHIFT)
#define RED_c(x) (((x) >> R_SHIFT) & MASK)
#define GREEN_c(x) (((x) >> G_SHIFT) & MASK)
#define BLUE_c(x) ((x) & MASK)
/*
* Helper macros.
*/
#define MUL_UNc(a, b, t) \
((t) = (a) * (b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
#define DIV_UNc(a, b) \
(((comp2_t) (a) * MASK) / (b))
#define ADD_UNc(x, y, t) \
((t) = x + y, \
(comp4_t) (comp1_t) ((t) | (0 - ((t) >> G_SHIFT))))
#define DIV_ONE_UNc(x) \
(((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
/*
* The methods below use some tricks to be able to do two color
* components at the same time.
*/
/*
* x_rb = (x_rb * a) / 255
*/
#define UNc_rb_MUL_UNc(x, a, t) \
do \
{ \
t = ((x) & RB_MASK) * (a); \
t += RB_ONE_HALF; \
x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
x &= RB_MASK; \
} while (0)
/*
* x_rb = min (x_rb + y_rb, 255)
*/
#define UNc_rb_ADD_UNc_rb(x, y, t) \
do \
{ \
t = ((x) + (y)); \
t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
x = (t & RB_MASK); \
} while (0)
/*
* x_rb = (x_rb * a_rb) / 255
*/
#define UNc_rb_MUL_UNc_rb(x, a, t) \
do \
{ \
t = (x & MASK) * (a & MASK); \
t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
t += RB_ONE_HALF; \
t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
x = t & RB_MASK; \
} while (0)
/*
* x_c = (x_c * a) / 255
*/
#define UNcx4_MUL_UNc(x, a) \
do \
{ \
comp4_t r1, r2, t; \
\
r1 = (x); \
UNc_rb_MUL_UNc (r1, a, t); \
\
r2 = (x) >> G_SHIFT; \
UNc_rb_MUL_UNc (r2, a, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a) / 255 + y_c
*/
#define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = (x); \
r2 = (y) & RB_MASK; \
UNc_rb_MUL_UNc (r1, a, t); \
UNc_rb_ADD_UNc_rb (r1, r2, t); \
\
r2 = (x) >> G_SHIFT; \
r3 = ((y) >> G_SHIFT) & RB_MASK; \
UNc_rb_MUL_UNc (r2, a, t); \
UNc_rb_ADD_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a + y_c * b) / 255
*/
#define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = x; \
r2 = y; \
UNc_rb_MUL_UNc (r1, a, t); \
UNc_rb_MUL_UNc (r2, b, t); \
UNc_rb_ADD_UNc_rb (r1, r2, t); \
\
r2 = (x >> G_SHIFT); \
r3 = (y >> G_SHIFT); \
UNc_rb_MUL_UNc (r2, a, t); \
UNc_rb_MUL_UNc (r3, b, t); \
UNc_rb_ADD_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a_c) / 255
*/
#define UNcx4_MUL_UNcx4(x, a) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = x; \
r2 = a; \
UNc_rb_MUL_UNc_rb (r1, r2, t); \
\
r2 = x >> G_SHIFT; \
r3 = a >> G_SHIFT; \
UNc_rb_MUL_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a_c) / 255 + y_c
*/
#define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = x; \
r2 = a; \
UNc_rb_MUL_UNc_rb (r1, r2, t); \
r2 = y & RB_MASK; \
UNc_rb_ADD_UNc_rb (r1, r2, t); \
\
r2 = (x >> G_SHIFT); \
r3 = (a >> G_SHIFT); \
UNc_rb_MUL_UNc_rb (r2, r3, t); \
r3 = (y >> G_SHIFT) & RB_MASK; \
UNc_rb_ADD_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a_c + y_c * b) / 255
*/
#define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = x; \
r2 = a; \
UNc_rb_MUL_UNc_rb (r1, r2, t); \
r2 = y; \
UNc_rb_MUL_UNc (r2, b, t); \
UNc_rb_ADD_UNc_rb (r1, r2, t); \
\
r2 = x >> G_SHIFT; \
r3 = a >> G_SHIFT; \
UNc_rb_MUL_UNc_rb (r2, r3, t); \
r3 = y >> G_SHIFT; \
UNc_rb_MUL_UNc (r3, b, t); \
UNc_rb_ADD_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
/*
x_c = min(x_c + y_c, 255)
*/
#define UNcx4_ADD_UNcx4(x, y) \
do \
{ \
comp4_t r1, r2, r3, t; \
\
r1 = x & RB_MASK; \
r2 = y & RB_MASK; \
UNc_rb_ADD_UNc_rb (r1, r2, t); \
\
r2 = (x >> G_SHIFT) & RB_MASK; \
r3 = (y >> G_SHIFT) & RB_MASK; \
UNc_rb_ADD_UNc_rb (r2, r3, t); \
\
x = r1 | (r2 << G_SHIFT); \
} while (0)
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