diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-04 23:52:42 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-05 00:05:33 +0100 |
| commit | 19e170aa6fd3652cc2e983a291f82350dca27e52 (patch) | |
| tree | f86226671300c63024a0e0237521376feaeba6f5 /src/sna/fb | |
| parent | 7895416eabfc5bd361d0d0ff92c570e2f6af47e0 (diff) | |
sna: Fix comparison of memcpy overlap to include x-offsets
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/sna/fb')
| -rw-r--r-- | src/sna/fb/fbblt.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/src/sna/fb/fbblt.c b/src/sna/fb/fbblt.c index 3b3fa485..62ed2a14 100644 --- a/src/sna/fb/fbblt.c +++ b/src/sna/fb/fbblt.c @@ -287,19 +287,18 @@ fbBlt(FbBits *srcLine, FbStride srcStride, int srcX, DBG(("%s fast blt, src_stride=%d, dst_stride=%d, width=%d (offset=%d)\n", __FUNCTION__, - srcStride, dstStride, width, - srcLine - dstLine)); + srcStride, dstStride, width, s - d)); - if ((srcLine < dstLine && srcLine + width > dstLine) || - (dstLine < srcLine && dstLine + width > srcLine)) + if (width == srcStride && width == dstStride) { + width *= height; + height = 1; + } + + if ((s < d && s + width > d) || (d < s && d + width > s)) func = memmove; else func = memcpy; if (!upsidedown) { - if (srcStride == dstStride && srcStride == width) { - width *= height; - height = 1; - } for (i = 0; i < height; i++) func(d + i * dstStride, s + i * srcStride, |