static Conv *
conv_new( IMAGE *in, IMAGE *out, INTMASK *mask )
{
Conv *conv = IM_NEW( out, Conv );
if( !conv )
return( NULL );
conv->in = in;
conv->out = out;
conv->mask = NULL;
conv->size = mask->xsize * mask->ysize;
conv->scale = mask->scale * mask->scale;
conv->underflow = 0;
conv->overflow = 0;
if( im_add_close_callback( out,
(im_callback_fn) conv_destroy, conv, NULL ) ||
!(conv->mask = im_dup_imask( mask, "conv_mask" )) )
return( NULL );
return( conv );
}
static Morph *
morph_new( IMAGE *in, IMAGE *out, INTMASK *mask, MorphOp op )
{
const int n_mask = mask->xsize * mask->ysize;
Morph *morph;
int i;
/* If in is not uchar, do (!=0) to make a uchar image.
*/
if( in->BandFmt != IM_BANDFMT_UCHAR ) {
IMAGE *t;
if( !(t = im_open_local( out, "morph_new", "p" )) ||
im_notequalconst( in, t, 0 ) )
return( NULL );
in = t;
}
if( im_piocheck( in, out ) ||
im_check_uncoded( "morph", in ) ||
im_check_format( "morph", in, IM_BANDFMT_UCHAR ) ||
im_check_imask( "morph", mask ) )
return( NULL );
for( i = 0; i < n_mask; i++ )
if( mask->coeff[i] != 0 &&
mask->coeff[i] != 128 &&
mask->coeff[i] != 255 ) {
im_error( "morph",
_( "bad mask element (%d "
"should be 0, 128 or 255)" ),
mask->coeff[i] );
return( NULL );
}
if( !(morph = IM_NEW( out, Morph )) )
return( NULL );
morph->in = in;
morph->out = out;
morph->mask = NULL;
morph->op = op;
morph->n_pass = 0;
for( i = 0; i < MAX_PASS; i++ )
morph->pass[i].vector = NULL;
if( im_add_close_callback( out,
(im_callback_fn) morph_close, morph, NULL ) ||
!(morph->mask = im_dup_imask( mask, "morph" )) )
return( NULL );
/* Generate code for this mask / image, if possible.
*/
if( vips_vector_isenabled() ) {
if( pass_compile( morph ) )
pass_free( morph );
}
return( morph );
}
/* Dilate an image.
*/
int
im_dilate_raw( IMAGE *in, IMAGE *out, INTMASK *m )
{
INTMASK *msk;
/* Check mask has odd number of elements in width and height.
*/
if( m->xsize < 1 || !(m->xsize & 0x1) ||
m->ysize < 1 || !(m->ysize & 0x1) ) {
im_error( "im_dilate", _( "mask size not odd" ) );
return( -1 );
}
/* Standard checks.
*/
if( im_piocheck( in, out ) )
return( -1 );
if( in->Coding != IM_CODING_NONE || in->Bbits != 8 ||
in->BandFmt != IM_BANDFMT_UCHAR ) {
im_error( "im_dilate", _( "uchar uncoded only" ) );
return( -1 );
}
if( im_cp_desc( out, in ) )
return( -1 );
/* Prepare output. Consider a 7x7 mask and a 7x7 image --- the output
* would be 1x1.
*/
if( im_cp_desc( out, in ) )
return( -1 );
out->Xsize -= m->xsize - 1;
out->Ysize -= m->ysize - 1;
if( out->Xsize <= 0 || out->Ysize <= 0 ) {
im_error( "im_dilate", _( "image too small for mask" ) );
return( -1 );
}
/* Take a copy of m.
*/
if( !(msk = im_dup_imask( m, "conv_mask" )) )
return( -1 );
if( im_add_close_callback( out,
(im_callback_fn) im_free_imask, msk, NULL ) ) {
im_free_imask( msk );
return( -1 );
}
/* Set demand hints. FATSTRIP is good for us, as THINSTRIP will cause
* too many recalculations on overlaps.
*/
if( im_demand_hint( out, IM_FATSTRIP, in, NULL ) )
return( -1 );
/* Generate!
*/
if( im_generate( out, dilate_start, dilate_gen, dilate_stop, in, msk ) )
return( -1 );
out->Xoffset = -m->xsize / 2;
out->Yoffset = -m->ysize / 2;
return( 0 );
}
