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| author | marha <marha@users.sourceforge.net> | 2010-02-27 16:02:46 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2010-02-27 16:02:46 +0000 |
| commit | 65fbbe1531c1e09cd40014374fdd93cff3a1d33a (patch) | |
| tree | 98646568c7171fb4d51b0043b29d52f57c358ea4 /pixman/pixman/pixman-edge-imp.h | |
| parent | 1ab2f9be54d01fc145e8f25d2e35a59636a2c0bf (diff) | |
| download | vcxsrv-65fbbe1531c1e09cd40014374fdd93cff3a1d33a.tar.gz vcxsrv-65fbbe1531c1e09cd40014374fdd93cff3a1d33a.tar.bz2 vcxsrv-65fbbe1531c1e09cd40014374fdd93cff3a1d33a.zip | |
Updated to pixman-0.17.8
Diffstat (limited to 'pixman/pixman/pixman-edge-imp.h')
| -rw-r--r-- | pixman/pixman/pixman-edge-imp.h | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/pixman/pixman/pixman-edge-imp.h b/pixman/pixman/pixman-edge-imp.h index a30f82108..a4698eddb 100644 --- a/pixman/pixman/pixman-edge-imp.h +++ b/pixman/pixman/pixman-edge-imp.h @@ -49,10 +49,14 @@ RASTERIZE_EDGES (pixman_image_t *image, rx = r->x; #if N_BITS == 1 /* For the non-antialiased case, round the coordinates up, in effect - * sampling the center of the pixel. (The AA case does a similar - * adjustment in RENDER_SAMPLES_X) */ - lx += X_FRAC_FIRST(1); - rx += X_FRAC_FIRST(1); + * sampling just slightly to the left of the pixel. This is so that + * when the sample point lies exactly on the line, we round towards + * north-west. + * + * (The AA case does a similar adjustment in RENDER_SAMPLES_X) + */ + lx += X_FRAC_FIRST(1) - pixman_fixed_e; + rx += X_FRAC_FIRST(1) - pixman_fixed_e; #endif /* clip X */ if (lx < 0) @@ -79,14 +83,6 @@ RASTERIZE_EDGES (pixman_image_t *image, #if N_BITS == 1 { -#ifdef WORDS_BIGENDIAN -# define SCREEN_SHIFT_LEFT(x,n) ((x) << (n)) -# define SCREEN_SHIFT_RIGHT(x,n) ((x) >> (n)) -#else -# define SCREEN_SHIFT_LEFT(x,n) ((x) >> (n)) -# define SCREEN_SHIFT_RIGHT(x,n) ((x) << (n)) -#endif - #define LEFT_MASK(x) \ (((x) & 0x1f) ? \ SCREEN_SHIFT_RIGHT (0xffffffff, (x) & 0x1f) : 0) |