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Fix shift-sign issue in Convert.c #7838

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merged 3 commits into from
Mar 9, 2024
Merged

Fix shift-sign issue in Convert.c #7838

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6fe0d63
Fix shift-sign issue in Convert.c
r-barnes Feb 27, 2024
42620f1
Leave unshifted int unchanged
radarhere Mar 9, 2024
6432ec4
Leave bitwise and operations unchanged
radarhere Mar 9, 2024
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4 changes: 2 additions & 2 deletions src/libImaging/Convert.c
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Original file line number Diff line number Diff line change
Expand Up @@ -507,10 +507,10 @@ rgba2rgb_(UINT8 *out, const UINT8 *in, int xsize) {
static void
rgbT2rgba(UINT8 *out, int xsize, int r, int g, int b) {
#ifdef WORDS_BIGENDIAN
UINT32 trns = ((r & 0xff) << 24) | ((g & 0xff) << 16) | ((b & 0xff) << 8) | 0xff;
UINT32 trns = ((r & 0xffU) << 24) | ((g & 0xffU) << 16) | ((b & 0xffU) << 8) | 0xff;
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UINT32 repl = trns & 0xffffff00;
#else
UINT32 trns = (0xff << 24) | ((b & 0xff) << 16) | ((g & 0xff) << 8) | (r & 0xff);
UINT32 trns = (0xffU << 24) | ((b & 0xffU) << 16) | ((g & 0xffU) << 8) | (r & 0xff);
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UINT32 repl = trns & 0x00ffffff;
#endif

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