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more getting ready

This commit is contained in:
John Cupitt 2017-10-06 08:19:44 +01:00
parent df8a2f4802
commit f430209a47
1 changed files with 106 additions and 10 deletions
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116
libvips/conversion/composite.cpp
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@ -206,7 +206,7 @@ vips_composite_prescale_gen( VipsRegion *output_region,
VipsRegion *input_region = (VipsRegion *) seq;
VipsImage *in = (VipsImage *) a;
int bands = in->Bands;
double *scale = (VipsComposite *) b;
double *scale = (double *) b;
VipsRect *r = &output_region->valid;
int sz = r->width * in->Bands;
@ -225,21 +225,36 @@ vips_composite_prescale_gen( VipsRegion *output_region,
switch( input_region->im->BandFmt ) {
case VIPS_FORMAT_UCHAR:
LOOP_PRESCALE( unsigned char, float ); break;
LOOP_PRESCALE( unsigned char, float );
break;
case VIPS_FORMAT_CHAR:
LOOP_PRESCALE( signed char, float ); break;
LOOP_PRESCALE( signed char, float );
break;
case VIPS_FORMAT_USHORT:
LOOP_PRESCALE( unsigned short, float ); break;
LOOP_PRESCALE( unsigned short, float );
break;
case VIPS_FORMAT_SHORT:
LOOP_PRESCALE( signed short, float ); break;
LOOP_PRESCALE( signed short, float );
break;
case VIPS_FORMAT_UINT:
LOOP_PRESCALE( unsigned int, float ); break;
LOOP_PRESCALE( unsigned int, float );
break;
case VIPS_FORMAT_INT:
LOOP_PRESCALE( signed int, float ); break;
LOOP_PRESCALE( signed int, float );
break;
case VIPS_FORMAT_FLOAT:
LOOP_PRESCALE( float, float ); break;
LOOP_PRESCALE( float, float );
break;
case VIPS_FORMAT_DOUBLE:
LOOP_PRESCALE( double, double ); break;
LOOP_PRESCALE( double, double );
break;
default:
g_assert_not_reached();
@ -252,6 +267,87 @@ vips_composite_prescale_gen( VipsRegion *output_region,
return( 0 );
}
#define LOOP_PRESCALE_PREMULTIPLY( IN, OUT ) { \
IN *tp = (IN ) p; \
OUT *tq = (OUT ) q; \
\
for( x = 0; x < sz; x++ ) \
for( b = 0; b < bands; b++ ) \
tq[b] = tp[b] * scale[b]; \
\
tq += bands; \
tp += bands; \
} \
}
static int
vips_composite_prescale_premultiply_gen( VipsRegion *output_region,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *input_region = (VipsRegion *) seq;
VipsImage *in = (VipsImage *) a;
int bands = in->Bands;
double *scale = (double *) b;
VipsRect *r = &output_region->valid;
int sz = r->width * in->Bands;
int x, b;
if( vips_region_prepare( input_region, r ) )
return( -1 );
VIPS_GATE_START( "vips_composite_prescale_premultiply_gen: work" );
for( int y = 0; y < r->height; y++ ) {
VipsPel *p = VIPS_REGION_ADDR( input_region,
r->left, r->top + y );
VipsPel *q = VIPS_REGION_ADDR( output_region,
r->left, r->top + y );
switch( input_region->im->BandFmt ) {
case VIPS_FORMAT_UCHAR:
LOOP_PRESCALE_PREMULTIPLY( unsigned char, float );
break;
case VIPS_FORMAT_CHAR:
LOOP_PRESCALE_PREMULTIPLY( signed char, float );
break;
case VIPS_FORMAT_USHORT:
LOOP_PRESCALE_PREMULTIPLY( unsigned short, float );
break;
case VIPS_FORMAT_SHORT:
LOOP_PRESCALE_PREMULTIPLY( signed short, float );
break;
case VIPS_FORMAT_UINT:
LOOP_PRESCALE_PREMULTIPLY( unsigned int, float );
break;
case VIPS_FORMAT_INT:
LOOP_PRESCALE_PREMULTIPLY( signed int, float );
break;
case VIPS_FORMAT_FLOAT:
LOOP_PRESCALE_PREMULTIPLY( float, float );
break;
case VIPS_FORMAT_DOUBLE:
LOOP_PRESCALE_PREMULTIPLY( double, double );
break;
default:
g_assert_not_reached();
return( -1 );
}
}
VIPS_GATE_STOP( "vips_composite_prescale_premultiply_gen: work" );
return( 0 );
}
/* Prescale all bands to float 0 - 1, or double if the input is double. If
* premultiplied is FALSE, also premultiply all non-alpha channels by alpha.
*/
@ -306,7 +402,7 @@ vips_composite_unprescale_gen( VipsRegion *output_region,
VipsRegion *input_region = (VipsRegion *) seq;
VipsImage *in = (VipsImage *) a;
int bands = in->Bands;
double *scale = (VipsComposite *) b;
double *scale = (double *) b;
VipsRect *r = &output_region->valid;
int sz = r->width * in->Bands;