sergiotarxz/libvips
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John Cupitt 2015-12-17 13:43:34 +00:00
parent 7068fbb20b
commit fb084ef6a6
2 changed files with 41 additions and 32 deletions
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1
ChangeLog
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@ -20,6 +20,7 @@
- Python x.bandjoin(y) is now x.ibandjoin(y), sorry
- oop, removed a DEBUG from buffer.c, vips is 30% faster
- faster and lower-mem TIFF read
- faster bilinear interpolator
7/5/15 started 8.1.1
- oop, vips-8.0 wrapper script should be vips-8.1, thanks Danilo

72
libvips/resample/interpolate.c
View File

@ -429,12 +429,13 @@ G_DEFINE_TYPE( VipsInterpolateBilinear, vips_interpolate_bilinear,
*/
#define BILINEAR_INT_INNER { \
tq[z] = (c1 * tp1[z] + c2 * tp2[z] + \
c3 * tp3[z] + c4 * tp4[z]) >> VIPS_INTERPOLATE_SHIFT; \
tq[z] = (sc1 * tp1[z] + sc2 * tp2[z] + \
sc3 * tp3[z] + sc4 * tp4[z]) >> VIPS_INTERPOLATE_SHIFT; \
z += 1; \
}
/* Fixed-point arithmetic, no tables.
*/
#define BILINEAR_INT( TYPE ) { \
TYPE * restrict tq = (TYPE *) out; \
\
@ -443,10 +444,15 @@ G_DEFINE_TYPE( VipsInterpolateBilinear, vips_interpolate_bilinear,
\
float Yd = 1.0f - Y; \
\
int c4 = VIPS_INTERPOLATE_SCALE * (Y * X); \
int c2 = VIPS_INTERPOLATE_SCALE * (Yd * X); \
int c3 = VIPS_INTERPOLATE_SCALE * (Y - c4); \
int c1 = VIPS_INTERPOLATE_SCALE * (Yd - c2); \
float c4 = Y * X; \
float c2 = Yd * X; \
float c3 = Y - c4; \
float c1 = Yd - c2; \
\
int sc1 = VIPS_INTERPOLATE_SCALE * c1;\
int sc2 = VIPS_INTERPOLATE_SCALE * c2;\
int sc3 = VIPS_INTERPOLATE_SCALE * c3;\
int sc4 = VIPS_INTERPOLATE_SCALE * c4;\
\
const TYPE * restrict tp1 = (TYPE *) p1; \
const TYPE * restrict tp2 = (TYPE *) p2; \
@ -456,32 +462,6 @@ G_DEFINE_TYPE( VipsInterpolateBilinear, vips_interpolate_bilinear,
z = 0; \
VIPS_UNROLL( b, BILINEAR_INT_INNER ); \
}
*/
/* Fixed-point arithmetic, no tables.
*/
#define BILINEAR_INT( TYPE ) { \
TYPE * restrict tq = (TYPE *) out; \
\
float Y = y - iy; \
float X = x - ix; \
\
float Yd = 1.0f - Y; \
\
int c4 = VIPS_INTERPOLATE_SCALE * (Y * X); \
int c2 = VIPS_INTERPOLATE_SCALE * (Yd * X); \
int c3 = VIPS_INTERPOLATE_SCALE * (Y - c4); \
int c1 = VIPS_INTERPOLATE_SCALE * (Yd - c2); \
\
const TYPE * restrict tp1 = (TYPE *) p1; \
const TYPE * restrict tp2 = (TYPE *) p2; \
const TYPE * restrict tp3 = (TYPE *) p3; \
const TYPE * restrict tp4 = (TYPE *) p4; \
\
for( z = 0; z < b; z++ ) \
tq[z] = (c1 * tp1[z] + c2 * tp2[z] + \
c3 * tp3[z] + c4 * tp4[z]) >> VIPS_INTERPOLATE_SHIFT; \
}
#define BILINEAR_FLOAT_INNER { \
tq[z] = c1 * tp1[z] + c2 * tp2[z] + \
@ -557,8 +537,36 @@ vips_interpolate_bilinear_interpolate( VipsInterpolate *interpolate,
g_assert( (int) x + 1 < VIPS_RECT_RIGHT( &in->valid ) );
g_assert( (int) y + 1 < VIPS_RECT_BOTTOM( &in->valid ) );
unsigned char * restrict tq = (unsigned char *) out;
float Y = y - iy;
float X = x - ix;
float Yd = 1.0f - Y;
float c4 = Y * X;
float c2 = Yd * X;
float c3 = Y - c4;
float c1 = Yd - c2;
int sc1 = VIPS_INTERPOLATE_SCALE * c1;
int sc2 = VIPS_INTERPOLATE_SCALE * c2;
int sc3 = VIPS_INTERPOLATE_SCALE * c3;
int sc4 = VIPS_INTERPOLATE_SCALE * c4;
const unsigned char * restrict tp1 = (unsigned char *) p1;
const unsigned char * restrict tp2 = (unsigned char *) p2;
const unsigned char * restrict tp3 = (unsigned char *) p3;
const unsigned char * restrict tp4 = (unsigned char *) p4;
for( z = 0; z < b; z++ )
tq[z] = (sc1 * tp1[z] + sc2 * tp2[z] +
sc3 * tp3[z] + sc4 * tp4[z]) >> VIPS_INTERPOLATE_SHIFT;
/*
SWITCH_INTERPOLATE( in->im->BandFmt,
BILINEAR_INT, BILINEAR_FLOAT );
*/
}
static void