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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <math.h>
#include <string.h>
#include "pixman-private.h"
#include "pixman-combine32.h"
static force_inline uint32_t
combine_mask (const uint32_t src, const uint32_t mask)
{
uint32_t s, m;
m = mask >> A_SHIFT;
if (!m)
return 0;
s = src;
UN8x4_MUL_UN8 (s, m);
return s;
}
static void
combine_src_u (pixman_implementation_t *imp,
pixman_op_t op,
uint32_t * dest,
const uint32_t * src,
const uint32_t * mask,
int width)
{
int i;
if (!mask)
memcpy (dest, src, width * sizeof (uint16_t));
else
{
uint16_t *d = (uint16_t*)dest;
uint16_t *src16 = (uint16_t*)src;
for (i = 0; i < width; ++i)
{
if ((*mask & 0xff000000) == 0xff000000) {
// it's likely worth special casing
// fully opaque because it avoids
// the cost of conversion as well the multiplication
*(d + i) = *src16;
} else {
// the mask is still 32bits
uint32_t s = combine_mask (convert_0565_to_8888(*src16), *mask);
*(d + i) = convert_8888_to_0565(s);
}
mask++;
src16++;
}
}
}
static void
combine_over_u (pixman_implementation_t *imp,
pixman_op_t op,
uint32_t * dest,
const uint32_t * src,
const uint32_t * mask,
int width)
{
int i;
if (!mask)
memcpy (dest, src, width * sizeof (uint16_t));
else
{
uint16_t *d = (uint16_t*)dest;
uint16_t *src16 = (uint16_t*)src;
for (i = 0; i < width; ++i)
{
if ((*mask & 0xff000000) == 0xff000000) {
// it's likely worth special casing
// fully opaque because it avoids
// the cost of conversion as well the multiplication
*(d + i) = *src16;
} else if ((*mask & 0xff000000) == 0x00000000) {
// keep the dest the same
} else {
// the mask is still 32bits
uint32_t s = combine_mask (convert_0565_to_8888(*src16), *mask);
uint32_t ia = ALPHA_8 (~s);
uint32_t d32 = convert_0565_to_8888(*(d + i));
UN8x4_MUL_UN8_ADD_UN8x4 (d32, ia, s);
*(d + i) = convert_8888_to_0565(d32);
}
mask++;
src16++;
}
}
}
void
_pixman_setup_combiner_functions_16 (pixman_implementation_t *imp)
{
int i;
for (i = 0; i < PIXMAN_N_OPERATORS; i++) {
imp->combine_16[i] = NULL;
}
imp->combine_16[PIXMAN_OP_SRC] = combine_src_u;
imp->combine_16[PIXMAN_OP_OVER] = combine_over_u;
}
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