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EXA: Optimize GXcopy tiled fills.

This commit is contained in:
Michel Dänzer 2008-07-30 18:30:37 +02:00
parent 37087bc106
commit a3afa6f2fb
1 changed files with 53 additions and 7 deletions
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60
exa/exa_accel.c
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@ -1211,6 +1211,7 @@ exaFillRegionTiled (DrawablePtr pDrawable,
int nbox = REGION_NUM_RECTS (pRegion);
BoxPtr pBox = REGION_RECTS (pRegion);
Bool ret = FALSE;
int i;
tileWidth = pTile->drawable.width;
tileHeight = pTile->drawable.height;
@ -1252,20 +1253,26 @@ exaFillRegionTiled (DrawablePtr pDrawable,
if ((*pExaScr->info->PrepareCopy) (pTile, pPixmap, 1, 1, alu, planemask))
{
while (nbox--)
for (i = 0; i < nbox; i++)
{
int height = pBox->y2 - pBox->y1;
int dstY = pBox->y1;
int height = pBox[i].y2 - pBox[i].y1;
int dstY = pBox[i].y1;
int tileY;
if (alu == GXcopy)
height = min(height, tileHeight);
modulus(dstY - yoff - pDrawable->y - pPatOrg->y, tileHeight, tileY);
while (height > 0) {
int width = pBox->x2 - pBox->x1;
int dstX = pBox->x1;
int width = pBox[i].x2 - pBox[i].x1;
int dstX = pBox[i].x1;
int tileX;
int h = tileHeight - tileY;
if (alu == GXcopy)
width = min(width, tileWidth);
if (h > height)
h = height;
height -= h;
@ -1287,12 +1294,51 @@ exaFillRegionTiled (DrawablePtr pDrawable,
dstY += h;
tileY = 0;
}
pBox++;
}
(*pExaScr->info->DoneCopy) (pPixmap);
exaMarkSync(pDrawable->pScreen);
ret = TRUE;
/* With GXcopy, we only need to do the basic algorithm up to the tile
* size; then, we can just keep doubling the destination in each
* direction until it fills the box. This way, the number of copy
* operations is O(log(rx)) + O(log(ry)) instead of O(rx * ry), where
* rx/ry is the ratio between box and tile width/height. This can make
* a big difference if each driver copy incurs a significant constant
* overhead.
*/
if (alu != GXcopy)
ret = TRUE;
else if ((*pExaScr->info->PrepareCopy) (pPixmap, pPixmap, 1, 1, alu,
planemask)) {
for (i = 0; i < nbox; i++)
{
int width = min(pBox[i].x2 - pBox[i].x1, tileWidth);
int height = min(pBox[i].y2 - pBox[i].y1, tileHeight);
int dstX = pBox[i].x1 + width;
int dstY = pBox[i].y1 + height;
while (dstX < pBox[i].x2) {
(*pExaScr->info->Copy) (pPixmap, pBox[i].x1, pBox[i].y1,
dstX, pBox[i].y1, width, height);
dstX += width;
width = min(pBox[i].x2 - dstX, width * 2);
}
width = pBox[i].x2 - pBox[i].x1;
while (dstY < pBox[i].y2) {
(*pExaScr->info->Copy) (pPixmap, pBox[i].x1, pBox[i].y1,
pBox[i].x1, dstY, width, height);
dstY += height;
height = min(pBox[i].y2 - dstY, height * 2);
}
}
(*pExaScr->info->DoneCopy) (pPixmap);
ret = TRUE;
}
}
out: