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sna/blt: Add a pair of operator reductions for opaque fills 

Extend the coverage of the BLT for a couple more composite operations,
though they be relatively infrequent.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-10-14 11:51:44 +01:00
parent 3f5289b299
commit e5e27528ff
1 changed files with 28 additions and 0 deletions
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28
src/sna/sna_blt.c
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@ -579,6 +579,20 @@ pixel_is_opaque(uint32_t pixel, uint32_t format)
return FALSE;
}
static Bool
pixel_is_white(uint32_t pixel, uint32_t format)
{
switch (PICT_FORMAT_TYPE(format)) {
case PICT_TYPE_A:
case PICT_TYPE_ARGB:
case PICT_TYPE_ABGR:
case PICT_TYPE_BGRA:
return pixel == ((1 << PICT_FORMAT_BPP(format)) - 1);
default:
return FALSE;
}
}
static Bool
is_opaque_solid(PicturePtr picture)
{
@ -589,6 +603,16 @@ is_opaque_solid(PicturePtr picture)
return pixel_is_opaque(get_pixel(picture), picture->format);
}
static Bool
is_white(PicturePtr picture)
{
if (picture->pSourcePict) {
PictSolidFill *fill = (PictSolidFill *) picture->pSourcePict;
return fill->color == 0xffffffff;
} else
return pixel_is_white(get_pixel(picture), picture->format);
}
fastcall
static void blt_fill_composite(struct sna *sna,
const struct sna_composite_op *op,
@ -1096,6 +1120,10 @@ sna_blt_composite(struct sna *sna,
if (is_solid(src)) {
if (op == PictOpOver && is_opaque_solid(src))
op = PictOpSrc;
if (op == PictOpAdd && is_white(src))
op = PictOpSrc;
if (op == PictOpOutReverse && is_opaque_solid(src))
return prepare_blt_clear(sna, tmp);
if (op != PictOpSrc) {
DBG(("%s: unsuported op [%d] for blitting\n",