/*
* Create an xa format from a PICT format.
*/
enum xa_formats
to_xa_format(enum _PictFormatShort format)
{
uint32_t ptype = PICT_FORMAT_TYPE(format);
if ((ptype >= ARRAY_SIZE(stype_map)) ||
(stype_map[ptype] == 0) ||
(stype_map[ptype] == xa_type_other))
return xa_format_unknown;
return xa_format(PICT_FORMAT_BPP(format),
stype_map[ptype],
PICT_FORMAT_A(format),
PICT_FORMAT_R(format),
PICT_FORMAT_G(format),
PICT_FORMAT_B(format));
}
static Bool
uxa_get_pixel_from_rgba(CARD32 * pixel,
CARD16 red,
CARD16 green,
CARD16 blue,
CARD16 alpha,
CARD32 format)
{
int rbits, bbits, gbits, abits;
int rshift, bshift, gshift, ashift;
rbits = PICT_FORMAT_R(format);
gbits = PICT_FORMAT_G(format);
bbits = PICT_FORMAT_B(format);
abits = PICT_FORMAT_A(format);
if (abits == 0)
abits = PICT_FORMAT_BPP(format) - (rbits+gbits+bbits);
if (PICT_FORMAT_TYPE(format) == PICT_TYPE_A) {
*pixel = alpha >> (16 - abits);
return TRUE;
}