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Fix a sign bug where memcpy was called with negative length.

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This commit is contained in:
Joerg Mayer 2000-03-04 19:00:42 +00:00 committed by Alexandre Julliard
parent e4960a1f0f
commit f02fcfc33c
1 changed files with 2 additions and 1 deletions
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3
graphics/x11drv/dib.c
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@ -2279,6 +2279,7 @@ static void X11DRV_DIB_GetImageBits_32( int lines, BYTE *dstbits,
/* align to 32 bit */
DWORD linebytes = (srcwidth * 4);
DWORD copybytes = linebytes;
if (lines < 0 )
{
@ -2296,7 +2297,7 @@ static void X11DRV_DIB_GetImageBits_32( int lines, BYTE *dstbits,
/* ==== 24/32 BGR bitmap to 32 BGR dib ==== */
if ( bmpImage->red_mask == 0xff0000 && bmpImage->blue_mask == 0xff )
for (h = lines - 1; h >= 0; h--, dstbits+=linebytes)
memcpy( dstbits, bmpImage->data + h*bmpImage->bytes_per_line, linebytes );
memcpy( dstbits, bmpImage->data + h*bmpImage->bytes_per_line, copybytes );
/* ==== 24/32 RGB bitmap to 32 BGR dib ==== */
else if ( bmpImage->red_mask == 0xff && bmpImage->blue_mask == 0xff0000 )