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sna: Avoid the call overhead for the trivial clip case 

Profile guided micro-optimisation. /o\

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-09-12 12:20:24 +01:00
parent 2540c877d4
commit 03a7fc16f9
1 changed files with 16 additions and 6 deletions
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22
src/sna/sna_composite.c
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@ -61,6 +61,12 @@ static void dst_move_area_to_cpu(PicturePtr picture,
#define BOUND(v) (INT16) ((v) < MINSHORT ? MINSHORT : (v) > MAXSHORT ? MAXSHORT : (v))
static inline bool
region_is_singular(pixman_region16_t *region)
{
return region->data == NULL;
}
static inline pixman_bool_t
clip_to_dst(pixman_region16_t *region,
pixman_region16_t *clip,
@ -76,10 +82,9 @@ clip_to_dst(pixman_region16_t *region,
clip->extents.x1, clip->extents.y1,
clip->extents.x2, clip->extents.y2));
if (pixman_region_n_rects(region) == 1 &&
pixman_region_n_rects(clip) == 1) {
pixman_box16_t *r = pixman_region_rectangles(region, NULL);
pixman_box16_t *c = pixman_region_rectangles(clip, NULL);
if (region_is_singular(region) && region_is_singular(clip)) {
pixman_box16_t *r = &region->extents;
pixman_box16_t *c = &clip->extents;
int v;
if (r->x1 < (v = c->x1 + dx))
@ -91,8 +96,12 @@ clip_to_dst(pixman_region16_t *region,
if (r->y2 > (v = c->y2 + dy))
r->y2 = BOUND(v);
if (r->x1 >= r->x2 || r->y1 >= r->y2)
if (r->x1 >= r->x2 || r->y1 >= r->y2) {
pixman_region_init(region);
return FALSE;
}
return TRUE;
} else if (!pixman_region_not_empty(clip)) {
return FALSE;
} else {
@ -102,8 +111,9 @@ clip_to_dst(pixman_region16_t *region,
return FALSE;
if (dx | dy)
pixman_region_translate(region, dx, dy);
return pixman_region_not_empty(region);
}
return pixman_region_not_empty(region);
}
static inline Bool