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sna/trapezoids: Ellide empty cells 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-03-04 22:23:39 +00:00
parent b69c9dfae1
commit f30b0beea4
1 changed files with 12 additions and 11 deletions
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23
src/sna/sna_trapezoids.c
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@ -1249,18 +1249,19 @@ tor_blt(struct sna *sna,
cell->x, cell->covered_height, cell->uncovered_area,
cover, xmax));
box.x2 = x;
if (box.x2 > box.x1 && (unbounded || cover)) {
__DBG(("%s: span (%d, %d)x(%d, %d) @ %d\n", __FUNCTION__,
box.x1, box.y1,
box.x2 - box.x1,
box.y2 - box.y1,
cover));
span(sna, op, clip, &box, cover);
if (cell->covered_height || cell->uncovered_area) {
box.x2 = x;
if (box.x2 > box.x1 && (unbounded || cover)) {
__DBG(("%s: span (%d, %d)x(%d, %d) @ %d\n", __FUNCTION__,
box.x1, box.y1,
box.x2 - box.x1,
box.y2 - box.y1,
cover));
span(sna, op, clip, &box, cover);
}
box.x1 = box.x2;
cover += cell->covered_height*FAST_SAMPLES_X*2;
}
box.x1 = box.x2;
cover += cell->covered_height*FAST_SAMPLES_X*2;
if (cell->uncovered_area) {
int area = cover - cell->uncovered_area;