From: Søren Sandmann Pedersen <sandmann@redhat.com>
Date: Fri, 7 Aug 2009 14:54:16 +0000 (-0400)
Subject: Fix bug in vmx_combine_xor_ca()
X-Git-Tag: pixman-0.15.20~1^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=27fb8378fdae930475cf4528c539a78bfbd751c5;p=platform%2Fupstream%2Fpixman.git

Fix bug in vmx_combine_xor_ca()

The destination needs to be inverted before the alpha channel is
extracted; otherwise, the RGB channels of da will be 0xff.
---

diff --git a/pixman/pixman-vmx.c b/pixman/pixman-vmx.c
index 7d947d1..5978a07 100644
--- a/pixman/pixman-vmx.c
+++ b/pixman/pixman-vmx.c
@@ -1542,11 +1542,11 @@ vmx_combine_xor_ca (pixman_implementation_t *imp,
 	uint32_t s = src[i];
 	uint32_t d = dest[i];
 	uint32_t sa = ALPHA_8 (s);
-	uint32_t da = ALPHA_8 (d);
+	uint32_t da = ALPHA_8 (~d);
 	
 	UN8x4_MUL_UN8x4 (s, a);
 	UN8x4_MUL_UN8 (a, sa);
-	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ~a, s, ~da);
+	UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8 (d, ~a, s, da);
 	dest[i] = d;
     }
 }