sergiotarxz/libvips
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stuff

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This commit is contained in:
John Cupitt 2011-01-11 17:32:04 +00:00
parent 609a598896
commit e96440d49b
1 changed files with 7 additions and 5 deletions
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12
libvips/resample/interpolate.c
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@ -336,8 +336,8 @@ G_DEFINE_TYPE( VipsInterpolateBilinear, vips_interpolate_bilinear,
#define BILINEAR_INT( TYPE ) { \
TYPE *tq = (TYPE *) out; \
\
const int X = (x - ix) * 128; \
const int Y = (y - iy) * 128; \
const int X = (x - ix) * VIPS_INTERPOLATE_SCALE; \
const int Y = (y - iy) * VIPS_INTERPOLATE_SCALE; \
\
const TYPE *tp1 = (TYPE *) p1; \
const TYPE *tp2 = (TYPE *) p2; \
@ -345,10 +345,12 @@ G_DEFINE_TYPE( VipsInterpolateBilinear, vips_interpolate_bilinear,
const TYPE *tp4 = (TYPE *) p4; \
\
for( z = 0; z < b; z++ ) { \
const int top = tp1[z] + ((X * (tp2[z] - tp1[z])) >> 7); \
const int bot = tp3[z] + ((X * (tp4[z] - tp3[z])) >> 7); \
const int top = tp1[z] + \
((X * (tp2[z] - tp1[z])) >> VIPS_INTERPOLATE_SHIFT); \
const int bot = tp3[z] + \
((X * (tp4[z] - tp3[z])) >> VIPS_INTERPOLATE_SHIFT); \
\
tq[z] = top + ((Y * (bot - top)) >> 7); \
tq[z] = top + ((Y * (bot - top)) >> VIPS_INTERPOLATE_SHIFT); \
} \
}