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/* WARNING: This file is generated by combine.pl from combine.inc.
Please edit one of those files rather than this one. */
#line 1 "pixman-combine.c.template"
#define COMPONENT_SIZE 16
#define MASK 0xffffULL
#define ONE_HALF 0x8000ULL
#define A_SHIFT 16 * 3
#define R_SHIFT 16 * 2
#define G_SHIFT 16
#define A_MASK 0xffff000000000000ULL
#define R_MASK 0xffff00000000ULL
#define G_MASK 0xffff0000ULL
#define RB_MASK 0xffff0000ffffULL
#define AG_MASK 0xffff0000ffff0000ULL
#define RB_ONE_HALF 0x800000008000ULL
#define RB_MASK_PLUS_ONE 0x10000000010000ULL
#define ALPHA_16(x) ((x) >> A_SHIFT)
#define RED_16(x) (((x) >> R_SHIFT) & MASK)
#define GREEN_16(x) (((x) >> G_SHIFT) & MASK)
#define BLUE_16(x) ((x) & MASK)
/*
* Helper macros.
*/
#define MUL_UN16(a, b, t) \
((t) = (a) * (b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
#define DIV_UN16(a, b) \
(((uint32_t) (a) * MASK) / (b))
#define ADD_UN16(x, y, t) \
((t) = x + y, \
(uint64_t) (uint16_t) ((t) | (0 - ((t) >> G_SHIFT))))
#define DIV_ONE_UN16(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_c = (x_c * a) / 255
*/
#define UN16x4_MUL_UN16(x, a) \
do \
{ \
uint64_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
t &= RB_MASK; \
\
x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)); \
x &= RB_MASK << COMPONENT_SIZE; \
x += t; \
} while (0)
/*
* x_c = (x_c * a) / 255 + y_c
*/
#define UN16x4_MUL_UN16_ADD_UN16x4(x, a, y) \
do \
{ \
/* multiply and divide: trunc((i + 128)*257/65536) */ \
uint64_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
t &= RB_MASK; \
\
/* add */ \
t += y & RB_MASK; \
\
/* saturate */ \
t |= RB_MASK_PLUS_ONE - ((t >> COMPONENT_SIZE) & RB_MASK); \
t &= RB_MASK; \
\
/* multiply and divide */ \
x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
x &= RB_MASK; \
\
/* add */ \
x += (y >> COMPONENT_SIZE) & RB_MASK; \
\
/* saturate */ \
x |= RB_MASK_PLUS_ONE - ((x >> COMPONENT_SIZE) & RB_MASK); \
x &= RB_MASK; \
\
/* recombine */ \
x <<= COMPONENT_SIZE; \
x += t; \
} while (0)
/*
* x_c = (x_c * a + y_c * b) / 255
*/
#define UN16x4_MUL_UN16_ADD_UN16x4_MUL_UN16(x, a, y, b) \
do \
{ \
uint64_t t; \
uint64_t r = (x >> A_SHIFT) * a + (y >> A_SHIFT) * b + ONE_HALF; \
r += (r >> G_SHIFT); \
r >>= G_SHIFT; \
\
t = (x & G_MASK) * a + (y & G_MASK) * b; \
t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
t >>= R_SHIFT; \
\
t |= r << R_SHIFT; \
t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
t &= RB_MASK; \
t <<= G_SHIFT; \
\
r = ((x >> R_SHIFT) & MASK) * a + \
((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
r += (r >> G_SHIFT); \
r >>= G_SHIFT; \
\
x = (x & MASK) * a + (y & MASK) * b + ONE_HALF; \
x += (x >> G_SHIFT); \
x >>= G_SHIFT; \
x |= r << R_SHIFT; \
x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
x &= RB_MASK; \
x |= t; \
} while (0)
/*
* x_c = (x_c * a_c) / 255
*/
#define UN16x4_MUL_UN16x4(x, a) \
do \
{ \
uint64_t t; \
uint64_t r = (x & MASK) * (a & MASK); \
r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
r += RB_ONE_HALF; \
r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
r &= RB_MASK; \
\
x >>= G_SHIFT; \
t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
t |= (x & R_MASK) * (a >> A_SHIFT); \
t += RB_ONE_HALF; \
t = t + ((t >> G_SHIFT) & RB_MASK); \
x = r | (t & AG_MASK); \
} while (0)
/*
* x_c = (x_c * a_c) / 255 + y_c
*/
#define UN16x4_MUL_UN16x4_ADD_UN16x4(x, a, y) \
do \
{ \
uint64_t t; \
uint64_t r = (x & MASK) * (a & MASK); \
r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
r += RB_ONE_HALF; \
r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
r &= RB_MASK; \
r += y & RB_MASK; \
r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
r &= RB_MASK; \
\
x >>= G_SHIFT; \
t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
t |= (x & R_MASK) * (a >> A_SHIFT); \
t += RB_ONE_HALF; \
t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
t &= RB_MASK; \
t += (y >> G_SHIFT) & RB_MASK; \
t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
t &= RB_MASK; \
x = r | (t << G_SHIFT); \
} while (0)
/*
* x_c = (x_c * a_c + y_c * b) / 255
*/
#define UN16x4_MUL_UN16x4_ADD_UN16x4_MUL_UN16(x, a, y, b) \
do \
{ \
uint64_t t; \
uint64_t r = (x >> A_SHIFT) * (a >> A_SHIFT) + \
(y >> A_SHIFT) * b; \
r += (r >> G_SHIFT) + ONE_HALF; \
r >>= G_SHIFT; \
\
t = (x & G_MASK) * ((a >> G_SHIFT) & MASK) + (y & G_MASK) * b; \
t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
t >>= R_SHIFT; \
\
t |= r << R_SHIFT; \
t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
t &= RB_MASK; \
t <<= G_SHIFT; \
\
r = ((x >> R_SHIFT) & MASK) * ((a >> R_SHIFT) & MASK) + \
((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
r += (r >> G_SHIFT); \
r >>= G_SHIFT; \
\
x = (x & MASK) * (a & MASK) + (y & MASK) * b + ONE_HALF; \
x += (x >> G_SHIFT); \
x >>= G_SHIFT; \
x |= r << R_SHIFT; \
x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
x &= RB_MASK; \
x |= t; \
} while (0)
/*
x_c = min(x_c + y_c, 255)
*/
#define UN16x4_ADD_UN16x4(x, y) \
do \
{ \
uint64_t t; \
uint64_t r = (x & RB_MASK) + (y & RB_MASK); \
r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
r &= RB_MASK; \
\
t = ((x >> G_SHIFT) & RB_MASK) + ((y >> G_SHIFT) & RB_MASK); \
t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
r |= (t & RB_MASK) << G_SHIFT; \
x = r; \
} while (0)
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