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Fixed UndefinedBehaviour in planar left shift

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This commit is contained in:
akallabeth 2020-05-15 15:34:42 +02:00
parent b9149df1e6
commit ee160fc414
1 changed files with 2 additions and 3 deletions
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5
libfreerdp/codec/planar.c
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@ -1170,7 +1170,6 @@ BYTE* freerdp_bitmap_planar_delta_encode_plane(const BYTE* inPlane, UINT32 width
BYTE* outPlane)
{
char s2c;
INT32 delta;
UINT32 y, x;
BYTE* outPtr;
const BYTE *srcPtr, *prevLinePtr;
@ -1194,9 +1193,9 @@ BYTE* freerdp_bitmap_planar_delta_encode_plane(const BYTE* inPlane, UINT32 width
{
for (x = 0; x < width; x++, outPtr++, srcPtr++, prevLinePtr++)
{
delta = *srcPtr - *prevLinePtr;
INT32 delta = *srcPtr - *prevLinePtr;
s2c = (delta >= 0) ? (char)delta : (char)(~((BYTE)(-delta)) + 1);
s2c = (s2c >= 0) ? (s2c << 1) : (char)(((~((BYTE)s2c) + 1) << 1) - 1);
s2c = (s2c >= 0) ? ((UINT32)s2c << 1) : (char)(((UINT32)(~((BYTE)s2c) + 1) << 1) - 1);
*outPtr = (BYTE)s2c;
}
}