? test/rotate-surface-pattern-ref.png
? test/testsvg-diff
? test/testsvg-output
Index: pixman/src/fbcompose.c
===================================================================
RCS file: /cvs/cairo/cairo/pixman/src/fbcompose.c,v
retrieving revision 1.3
diff -u -r1.3 fbcompose.c
--- pixman/src/fbcompose.c	28 Aug 2005 02:32:57 -0000	1.3
+++ pixman/src/fbcompose.c	9 Sep 2005 12:58:18 -0000
@@ -2724,8 +2724,9 @@
         xFixed_32_32 l;
         xFixed_48_16 dx, dy, a, b, off;
 
-        v.vector[0] = IntToxFixed(x);
-        v.vector[1] = IntToxFixed(y);
+        /* reference point is the center of the pixel */
+        v.vector[0] = IntToxFixed(x) + xFixed1/2;
+        v.vector[1] = IntToxFixed(y) + xFixed1/2;
         v.vector[2] = xFixed1;
         if (pict->transform) {
             if (!PictureTransformPoint3d (pict->transform, &v))
@@ -2791,8 +2792,9 @@
 
         if (pict->transform) {
             PictVector v;
-            v.vector[0] = IntToxFixed(x);
-            v.vector[1] = IntToxFixed(y);
+            /* reference point is the center of the pixel */
+            v.vector[0] = IntToxFixed(x) + xFixed1/2;
+            v.vector[1] = IntToxFixed(y) + xFixed1/2;
             v.vector[2] = xFixed1;
             if (!PictureTransformPoint3d (pict->transform, &v))
                 return;
@@ -2913,8 +2915,9 @@
     x += xoff;
     y += yoff;
 
-    v.vector[0] = IntToxFixed(x);
-    v.vector[1] = IntToxFixed(y);
+    /* reference point is the center of the pixel */
+    v.vector[0] = IntToxFixed(x) + xFixed1/2;
+    v.vector[1] = IntToxFixed(y) + xFixed1/2;
     v.vector[2] = xFixed1;
 
     /* when using convolution filters one might get here without a transform */
@@ -3020,6 +3023,12 @@
             }
         }
     } else if (pict->filter == PIXMAN_FILTER_BILINEAR || pict->filter == PIXMAN_FILTER_GOOD || pict->filter == PIXMAN_FILTER_BEST) {
+        /* adjust vector for maximum contribution at 0.5, 0.5 of each texel. */
+        v.vector[0] -= v.vector[2]/2;
+        v.vector[1] -= v.vector[2]/2;
+        unit.vector[0] -= unit.vector[2]/2;
+        unit.vector[1] -= unit.vector[2]/2;
+
         if (pict->repeat == RepeatNormal) {
             if (PIXREGION_NUM_RECTS(pict->pCompositeClip) == 1) {
                 box = pict->pCompositeClip->extents;