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[fill] Construct trap using rectangle directly.

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Avoid the overhead in sorting the edges within
_cairo_traps_tessellate_convex_quad() by using our prior knowledge that we
have a simple rectangle and construct the trap from the extreme points.
This commit is contained in:
Chris Wilson 2008-09-19 13:29:01 +01:00
parent e749b58af8
commit 91f0b8b1ea
1 changed files with 14 additions and 2 deletions
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16
src/cairo-path-fill.c
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@ -215,8 +215,20 @@ _cairo_path_fixed_fill_rectangle (cairo_path_fixed_t *path,
cairo_traps_t *traps)
{
if (_cairo_path_fixed_is_box (path, NULL)) {
return _cairo_traps_tessellate_convex_quad (traps,
path->buf_head.base.points);
cairo_point_t *p = path->buf_head.base.points;
cairo_point_t *top_left, *bot_right;
int n;
top_left = &p[0];
bot_right = &p[0];
for (n = 1; n < 4; n++) {
if (p[n].x <= top_left->x && p[n].y <= top_left->y)
top_left = &p[n];
if (p[n].x >= bot_right->x && p[n].y >= bot_right->y)
bot_right = &p[n];
}
return _cairo_traps_tessellate_rectangle (traps, top_left, bot_right);
}
return CAIRO_INT_STATUS_UNSUPPORTED;