Author: bde
Date: Fri Apr 26 13:04:10 2019
New Revision: 346743
URL: https://svnweb.freebsd.org/changeset/base/346743
Log:
Fix an off-by-1 error for copying overlapping bitmaps in r346416. For
nonzero height, the first line in the original order was not copied, and
for zero height, garbage lines before the first were copied until a crash
occurred.
Modified:
head/lib/libvgl/bitmap.c
Modified: head/lib/libvgl/bitmap.c
==============================================================================
--- head/lib/libvgl/bitmap.c Fri Apr 26 13:00:25 2019 (r346742)
+++ head/lib/libvgl/bitmap.c Fri Apr 26 13:04:10 2019 (r346743)
@@ -207,7 +207,7 @@ __VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
yextra = 0;
ystep = 1;
if (src->Bitmap == dst->Bitmap && srcy < dsty) {
- yend = srcy;
+ yend = srcy - 1;
yextra = hight - 1;
ystep = -1;
}
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