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mesa: fix unpack_ARGB1555_REV()

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We weren't doing the necessary byte swap.

v2: use same arithmetic as unpack_ARGB1555() to be consistent.

Reviewed-by: Michel Dänzer <michel@daenzer.net>
This commit is contained in:
Brian Paul
2011-11-30 20:35:02 -07:00
parent 478f0d228b
commit e10942c8e9
1 changed files with 5 additions and 4 deletions
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9
src/mesa/main/format_unpack.c
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@@ -275,10 +275,11 @@ unpack_ARGB1555_REV(const void *src, GLfloat dst[][4], GLuint n)
const GLushort *s = ((const GLushort *) src);
GLuint i;
for (i = 0; i < n; i++) {
dst[i][RCOMP] = UBYTE_TO_FLOAT( ((s[i] >> 7) & 0xf8) | ((s[i] >> 12) & 0x7) );
dst[i][GCOMP] = UBYTE_TO_FLOAT( ((s[i] >> 2) & 0xf8) | ((s[i] >> 7) & 0x7) );
dst[i][BCOMP] = UBYTE_TO_FLOAT( ((s[i] << 3) & 0xf8) | ((s[i] >> 2) & 0x7) );
dst[i][ACOMP] = UBYTE_TO_FLOAT( ((s[i] >> 15) & 0x01) * 255 );
GLushort tmp = (s[i] << 8) | (s[i] >> 8); /* byteswap */
dst[i][RCOMP] = ((tmp >> 10) & 0x1f) * (1.0F / 31.0F);
dst[i][GCOMP] = ((tmp >> 5) & 0x1f) * (1.0F / 31.0F);
dst[i][BCOMP] = ((tmp >> 0) & 0x1f) * (1.0F / 31.0F);
dst[i][ACOMP] = ((tmp >> 15) & 0x01) * 1.0F;
}
}