Attachment 106989 Details for Bug 84396 – move sample locations wrt edges

[patch] move sample locations wrt edges

0001-move-sample-location-wrt-edges.patch (text/plain), 1.66 KB, created by Chris Wilson on 2014-09-28 07:59:54 UTC

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Creator: Chris Wilson

Created: 2014-09-28 07:59:54 UTC

Size: 1.66 KB

patch

obsolete

>From d9b2b01772603a2ebf54ccf454f5588109ee97bf Mon Sep 17 00:00:00 2001
>From: Chris Wilson <chris@chris-wilson.co.uk>
>Date: Sun, 28 Sep 2014 08:59:01 +0100
>Subject: [PATCH] move sample location wrt edges
>
>---
> src/cairo-tor-scan-converter.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
>diff --git a/src/cairo-tor-scan-converter.c b/src/cairo-tor-scan-converter.c
>index 89ef20f..e271c31 100644
>--- a/src/cairo-tor-scan-converter.c
>+++ b/src/cairo-tor-scan-converter.c
>@@ -1469,19 +1469,19 @@ glitter_scan_converter_reset(
>  * shifts if possible, and something saneish if not.
>  */
> #if !defined(INPUT_TO_GRID_Y) && defined(GRID_Y_BITS) && GRID_Y_BITS <= GLITTER_INPUT_BITS
>-#  define INPUT_TO_GRID_Y(in, out) (out) = (in) >> (GLITTER_INPUT_BITS - GRID_Y_BITS)
>+#  define INPUT_TO_GRID_Y(in, out) (out) = ((in) + ((GLITTER_INPUT_BITS - GRID_Y_BITS) >> 1) - 1) >> (GLITTER_INPUT_BITS - GRID_Y_BITS)
> #else
> #  define INPUT_TO_GRID_Y(in, out) INPUT_TO_GRID_general(in, out, GRID_Y)
> #endif
> 
> #if !defined(INPUT_TO_GRID_X) && defined(GRID_X_BITS) && GRID_X_BITS <= GLITTER_INPUT_BITS
>-#  define INPUT_TO_GRID_X(in, out) (out) = (in) >> (GLITTER_INPUT_BITS - GRID_X_BITS)
>+#  define INPUT_TO_GRID_X(in, out) (out) = ((in) + ((GLITTER_INPUT_BITS - GRID_X_BITS) >> 1) - 1) >> (GLITTER_INPUT_BITS - GRID_X_BITS)
> #else
> #  define INPUT_TO_GRID_X(in, out) INPUT_TO_GRID_general(in, out, GRID_X)
> #endif
> 
> #define INPUT_TO_GRID_general(in, out, grid_scale) do {		\
>-    long long tmp__ = (long long)(grid_scale) * (in);	\
>+    long long tmp__ = (long long)(grid_scale) * (in) + ((grid_scale)+1)/2-1;	\
>     tmp__ >>= GLITTER_INPUT_BITS;				\
>     (out) = tmp__;						\
> } while (0)
>-- 
>2.1.1
>

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Attachments on bug 84396: 106961 | 106989 | 107095 | 107101 | 107103 | 107104 | 107186 | 107189 | 107344

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