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Diffstat (limited to 'xorg-server/fb')
-rw-r--r--xorg-server/fb/fbblt.c60
1 files changed, 33 insertions, 27 deletions
diff --git a/xorg-server/fb/fbblt.c b/xorg-server/fb/fbblt.c
index 72a05f61a..c615106d1 100644
--- a/xorg-server/fb/fbblt.c
+++ b/xorg-server/fb/fbblt.c
@@ -56,42 +56,48 @@ fbBlt(FbBits * srcLine,
int n, nmiddle;
Bool destInvarient;
int startbyte, endbyte;
- int careful;
FbDeclareMergeRop();
+ if (alu == GXcopy && pm == FB_ALLONES &&
+ !(srcX & 7) && !(dstX & 7) && !(width & 7))
+ {
+ CARD8 *src_byte = (CARD8 *) srcLine + (srcX >> 3);
+ CARD8 *dst_byte = (CARD8 *) dstLine + (dstX >> 3);
+ FbStride src_byte_stride = srcStride << (FB_SHIFT - 3);
+ FbStride dst_byte_stride = dstStride << (FB_SHIFT - 3);
+ int width_byte = (width >> 3);
+
+ /* Make sure there's no overlap; we can't use memcpy in that
+ * case as it's not well defined, so fall through to the
+ * general code
+ */
+ if (src_byte + width_byte <= dst_byte ||
+ dst_byte + width_byte <= src_byte)
+ {
+ int i;
+
+ if (!upsidedown)
+ for (i = 0; i < height; i++)
+ MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride,
+ src_byte + i * src_byte_stride,
+ width_byte);
+ else
+ for (i = height - 1; i >= 0; i--)
+ MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride,
+ src_byte + i * src_byte_stride,
+ width_byte);
+
+ return;
+ }
+ }
+
if (bpp == 24 && !FbCheck24Pix(pm)) {
fbBlt24(srcLine, srcStride, srcX, dstLine, dstStride, dstX,
width, height, alu, pm, reverse, upsidedown);
return;
}
- careful = !((srcLine < dstLine && srcLine + width * (bpp >> 3) > dstLine) ||
- (dstLine < srcLine && dstLine + width * (bpp >> 3) > srcLine))
- || (bpp & 7);
-
- if (alu == GXcopy && pm == FB_ALLONES && !careful &&
- !(srcX & 7) && !(dstX & 7) && !(width & 7)) {
- int i;
- CARD8 *tmpsrc = (CARD8 *) srcLine;
- CARD8 *tmpdst = (CARD8 *) dstLine;
-
- srcStride *= sizeof(FbBits);
- dstStride *= sizeof(FbBits);
- width >>= 3;
- tmpsrc += (srcX >> 3);
- tmpdst += (dstX >> 3);
-
- if (!upsidedown)
- for (i = 0; i < height; i++)
- MEMCPY_WRAPPED(tmpdst + i * dstStride, tmpsrc + i * srcStride, width);
- else
- for (i = height - 1; i >= 0; i--)
- MEMCPY_WRAPPED(tmpdst + i * dstStride, tmpsrc + i * srcStride, width);
-
- return;
- }
-
FbInitializeMergeRop(alu, pm);
destInvarient = FbDestInvarientMergeRop();
if (upsidedown) {