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Fix vmx_combine_out_ca()

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It should multiply with just the destination alpha channel, not all
four channels.
This commit is contained in:
Søren Sandmann Pedersen 2009-08-07 11:16:31 -04:00
parent 5191421d1f
commit de180baba3
1 changed files with 7 additions and 8 deletions
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15
pixman/pixman-vmx.c
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@ -1334,24 +1334,23 @@ vmx_combine_out_ca (pixman_implementation_t *imp,
vector unsigned int vdest, vsrc, vmask;
vector unsigned char tmp1, tmp2, tmp3, tmp4, edges,
dest_mask, mask_mask, src_mask, store_mask;
COMPUTE_SHIFT_MASKC (dest, src, mask);
/* printf ("%s\n",__PRETTY_FUNCTION__); */
for (i = width / 4; i > 0; i--)
{
LOAD_VECTORSC (dest, src, mask);
vdest = pix_multiply (pix_multiply (vsrc, vmask), splat_alpha (vdest));
STORE_VECTOR (dest);
src += 4;
dest += 4;
mask += 4;
}
for (i = width % 4; --i >= 0;)
{
uint32_t a = mask[i];
@ -1359,7 +1358,7 @@ vmx_combine_out_ca (pixman_implementation_t *imp,
uint32_t d = dest[i];
uint32_t da = ALPHA_8 (~d);
UN8x4_MUL_UN8x4 (s, a);
UN8x4_MUL_UN8x4 (s, da);
UN8x4_MUL_UN8 (s, da);
dest[i] = s;
}
}