/* Another strip of image pixels from vips_sink_disc(). Write into the top
* pyramid layer.
*/
static int
write_strip( VipsRegion *region, VipsRect *area, void *a )
{
Write *write = (Write *) a;
Layer *layer = write->layer;
#ifdef DEBUG
printf( "write_strip: strip at %d, height %d\n",
area->top, area->height );
#endif/*DEBUG*/
for(;;) {
VipsRect *to = &layer->strip->valid;
VipsRect target;
/* The bit of strip that needs filling.
*/
target.left = 0;
target.top = layer->write_y;
target.width = layer->image->Xsize;
target.height = to->height;
vips_rect_intersectrect( &target, to, &target );
/* Clip against what we have available.
*/
vips_rect_intersectrect( &target, area, &target );
/* Are we empty? All done.
*/
if( vips_rect_isempty( &target ) )
break;
/* And copy those pixels in.
*
* FIXME: If the strip fits inside the region we've just
* received, we could skip the copy. Will this happen very
* often? Unclear.
*/
vips_region_copy( region, layer->strip,
&target, target.left, target.top );
layer->write_y += target.height;
/* We can either fill the strip, if it's somewhere half-way
* down the image, or, if it's at the bottom, get to the last
* real line of pixels.
*/
if( layer->write_y == VIPS_RECT_BOTTOM( to ) ||
layer->write_y == layer->height ) {
if( layer_strip_arrived( layer ) )
return( -1 );
}
}
return( 0 );
}
static void *
vips_buffer_dump( VipsBuffer *buffer, size_t *reserve, size_t *alive )
{
vips_buffer_print( buffer );
g_assert( buffer->im );
g_assert( buffer->buf );
if( !buffer->cache &&
!buffer->done ) {
/* Global buffer, not linked to any cache.
*/
printf( "global buffer %p, %.3g MB\n",
buffer, buffer->bsize / (1024 * 1024.0) );
*alive += buffer->bsize;
}
else if( buffer->cache &&
buffer->done &&
!vips_rect_isempty( &buffer->area ) &&
g_slist_find( buffer->cache->buffers, buffer ) ) {
/* Published on a thread.
*/
printf( "thread buffer %p, %.3g MB\n",
buffer, buffer->bsize / (1024 * 1024.0) );
*alive += buffer->bsize;
}
else if( buffer->ref_count == 0 &&
buffer->cache &&
!buffer->done &&
vips_rect_isempty( &buffer->area ) &&
g_slist_find( buffer->cache->reserve, buffer ) )
/* Held in reserve.
*/
*reserve += buffer->bsize;
else
printf( "buffer craziness!\n" );
return( NULL );
}
/* Insert generate function.
*/
static int
vips_insert_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion **ir = (VipsRegion **) seq;
VipsRect *r = &or->valid;
VipsInsert *insert = (VipsInsert *) b;
VipsRect ovl;
/* Does the rect we have been asked for fall entirely inside the
* sub-image?
*/
if( vips_rect_includesrect( &insert->rsub, &or->valid ) )
return( vips_insert_just_one( or, ir[1],
insert->rsub.left, insert->rsub.top ) );
/* Does it fall entirely inside the main, and not at all inside the
* sub?
*/
vips_rect_intersectrect( &or->valid, &insert->rsub, &ovl );
if( vips_rect_includesrect( &insert->rmain, &or->valid ) &&
vips_rect_isempty( &ovl ) )
return( vips_insert_just_one( or, ir[0],
insert->rmain.left, insert->rmain.top ) );
/* Output requires both (or neither) input. If it is not entirely
* inside both the main and the sub, then there is going to be some
* background.
*/
if( !(vips_rect_includesrect( &insert->rsub, &or->valid ) &&
vips_rect_includesrect( &insert->rmain, &or->valid )) )
vips_region_paint_pel( or, r, insert->ink );
/* Paste from main.
*/
if( vips_insert_paste_region( or, ir[0], &insert->rmain ) )
return( -1 );
/* Paste from sub.
*/
if( vips_insert_paste_region( or, ir[1], &insert->rsub ) )
return( -1 );
return( 0 );
}
/* Paste in parts of ir that fall within or --- ir is an input REGION for an
* image positioned at pos within or.
*/
static int
vips_insert_paste_region( VipsRegion *or, VipsRegion *ir, VipsRect *pos )
{
VipsRect ovl;
/* Does any of the sub-image appear in the area we have been asked
* to make?
*/
vips_rect_intersectrect( &or->valid, pos, &ovl );
if( !vips_rect_isempty( &ovl ) ) {
/* Find the part of in we need.
*/
ovl.left -= pos->left;
ovl.top -= pos->top;
/* Paint this area of pixels into or.
*/
if( vips_region_prepare_to( ir, or, &ovl,
ovl.left + pos->left, ovl.top + pos->top ) )
return( -1 );
}
return( 0 );
}
static int
vips_replicate_gen( VipsRegion *or, void *seq, void *a, void *b,
gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
VipsImage *in = (VipsImage *) a;
VipsRect *r = &or->valid;
int twidth = in->Xsize;
int theight = in->Ysize;
int x, y;
VipsRect tile;
/* Find top left of tiles we need.
*/
int xs = (r->left / twidth) * twidth;
int ys = (r->top / theight) * theight;
/* The tile enclosing the top-left corner of the requested area.
*/
tile.left = xs;
tile.top = ys;
tile.width = twidth;
tile.height = theight;
/* If the request fits inside a single tile, we can just pointer-copy.
*/
if( vips_rect_includesrect( &tile, r ) ) {
VipsRect irect;
/* Translate request to input space.
*/
irect = *r;
irect.left -= xs;
irect.top -= ys;
if( vips_region_prepare( ir, &irect ) )
return( -1 );
if( vips_region_region( or, ir, r, irect.left, irect.top ) )
return( -1 );
return( 0 );
}
for( y = ys; y < VIPS_RECT_BOTTOM( r ); y += theight )
for( x = xs; x < VIPS_RECT_RIGHT( r ); x += twidth ) {
VipsRect paint;
/* Whole tile at x, y
*/
tile.left = x;
tile.top = y;
tile.width = twidth;
tile.height = theight;
/* Which parts touch the area of the output we are
* building.
*/
vips_rect_intersectrect( &tile, r, &paint );
/* Translate back to ir coordinates.
*/
paint.left -= x;
paint.top -= y;
g_assert( !vips_rect_isempty( &paint ) );
/* Render into or.
*/
if( vips_region_prepare_to( ir, or, &paint,
paint.left + x,
paint.top + y ) )
return( -1 );
}
return( 0 );
}
static int
vips_embed_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
VipsEmbed *embed = (VipsEmbed *) b;
VipsRect *r = &or->valid;
Rect ovl;
int i;
VipsPel *p;
int plsk;
/* Entirely within the input image? Generate the subimage and copy
* pointers.
*/
if( vips_rect_includesrect( &embed->rsub, r ) ) {
VipsRect need;
need = *r;
need.left -= embed->x;
need.top -= embed->y;
if( vips_region_prepare( ir, &need ) ||
vips_region_region( or, ir, r, need.left, need.top ) )
return( -1 );
return( 0 );
}
/* Does any of the input image appear in the area we have been asked
* to make? Paste it in.
*/
vips_rect_intersectrect( r, &embed->rsub, &ovl );
if( !vips_rect_isempty( &ovl ) ) {
/* Paint the bits coming from the input image.
*/
ovl.left -= embed->x;
ovl.top -= embed->y;
if( vips_region_prepare_to( ir, or, &ovl,
ovl.left + embed->x, ovl.top + embed->y ) )
return( -1 );
ovl.left += embed->x;
ovl.top += embed->y;
}
switch( embed->extend ) {
case VIPS_EXTEND_BLACK:
case VIPS_EXTEND_WHITE:
VIPS_GATE_START( "vips_embed_gen: work1" );
/* Paint the borders a solid value.
*/
for( i = 0; i < 8; i++ )
vips_region_paint( or, &embed->border[i],
embed->extend == 0 ? 0 : 255 );
VIPS_GATE_STOP( "vips_embed_gen: work1" );
break;
case VIPS_EXTEND_BACKGROUND:
VIPS_GATE_START( "vips_embed_gen: work2" );
/* Paint the borders a solid value.
*/
for( i = 0; i < 8; i++ )
vips_region_paint_pel( or, &embed->border[i],
embed->ink );
VIPS_GATE_STOP( "vips_embed_gen: work2" );
break;
case VIPS_EXTEND_COPY:
/* Extend the borders.
*/
for( i = 0; i < 8; i++ ) {
VipsRect todo;
VipsRect edge;
vips_rect_intersectrect( r, &embed->border[i], &todo );
if( !vips_rect_isempty( &todo ) ) {
vips_embed_find_edge( embed, &todo, i, &edge );
/* Did we paint any of the input image? If we
* did, we can fetch the edge pixels from
* that.
*/
if( !vips_rect_isempty( &ovl ) ) {
p = VIPS_REGION_ADDR( or,
edge.left, edge.top );
plsk = VIPS_REGION_LSKIP( or );
}
else {
/* No pixels painted ... fetch
* directly from the input image.
*/
edge.left -= embed->x;
edge.top -= embed->y;
if( vips_region_prepare( ir, &edge ) )
return( -1 );
p = VIPS_REGION_ADDR( ir,
edge.left, edge.top );
plsk = VIPS_REGION_LSKIP( ir );
}
vips_embed_paint_edge( embed,
or, i, &todo, p, plsk );
}
}
break;
default:
g_assert( 0 );
}
return( 0 );
}
static int
vips_affine_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
const VipsAffine *affine = (VipsAffine *) b;
const VipsImage *in = (VipsImage *) a;
const int window_size =
vips_interpolate_get_window_size( affine->interpolate );
const int window_offset =
vips_interpolate_get_window_offset( affine->interpolate );
const VipsInterpolateMethod interpolate =
vips_interpolate_get_method( affine->interpolate );
/* Area we generate in the output image.
*/
const VipsRect *r = &or->valid;
const int le = r->left;
const int ri = VIPS_RECT_RIGHT( r );
const int to = r->top;
const int bo = VIPS_RECT_BOTTOM( r );
const VipsRect *iarea = &affine->trn.iarea;
const VipsRect *oarea = &affine->trn.oarea;
int ps = VIPS_IMAGE_SIZEOF_PEL( in );
int x, y, z;
VipsRect image, want, need, clipped;
#ifdef DEBUG_VERBOSE
printf( "vips_affine_gen: "
"generating left=%d, top=%d, width=%d, height=%d\n",
r->left,
r->top,
r->width,
r->height );
#endif /*DEBUG_VERBOSE*/
/* We are generating this chunk of the transformed image. This takes
* us to space 4.
*/
want = *r;
want.left += oarea->left;
want.top += oarea->top;
/* Find the area of the input image we need. This takes us to space 3.
*/
vips__transform_invert_rect( &affine->trn, &want, &need );
/* That does round-to-nearest, because it has to stop rounding errors
* growing images unexpectedly. We need round-down, so we must
* add half a pixel along the left and top. But we are int :( so add 1
* pixel.
*
* Add an extra line along the right and bottom as well, for rounding.
*/
vips_rect_marginadjust( &need, 1 );
/* We need to fetch a larger area for the interpolator.
*/
need.left -= window_offset;
need.top -= window_offset;
need.width += window_size - 1;
need.height += window_size - 1;
/* Now go to space 2, the expanded input image. This is the one we
* read pixels from.
*/
need.left += window_offset;
need.top += window_offset;
/* Clip against the size of (2).
*/
image.left = 0;
image.top = 0;
image.width = in->Xsize;
image.height = in->Ysize;
vips_rect_intersectrect( &need, &image, &clipped );
#ifdef DEBUG_VERBOSE
printf( "vips_affine_gen: "
"preparing left=%d, top=%d, width=%d, height=%d\n",
clipped.left,
clipped.top,
clipped.width,
clipped.height );
#endif /*DEBUG_VERBOSE*/
if( vips_rect_isempty( &clipped ) ) {
vips_region_black( or );
return( 0 );
}
if( vips_region_prepare( ir, &clipped ) )
return( -1 );
VIPS_GATE_START( "vips_affine_gen: work" );
/* Resample! x/y loop over pixels in the output image (5).
*/
for( y = to; y < bo; y++ ) {
/* Input clipping rectangle. We offset this so we can clip in
* space 2.
*/
const int ile = iarea->left + window_offset;
const int ito = iarea->top + window_offset;
const int iri = ile + iarea->width;
const int ibo = ito + iarea->height;
/* Derivative of matrix.
*/
const double ddx = affine->trn.ia;
const double ddy = affine->trn.ic;
/* Continuous cods in transformed space.
*/
const double ox = le + oarea->left - affine->trn.odx;
const double oy = y + oarea->top - affine->trn.ody;
/* Continuous cods in input space.
*/
double ix, iy;
VipsPel *q;
/* To (3).
*/
ix = affine->trn.ia * ox + affine->trn.ib * oy;
iy = affine->trn.ic * ox + affine->trn.id * oy;
/* And the input offset in (3).
*/
ix -= affine->trn.idx;
iy -= affine->trn.idy;
/* Finally to 2.
*/
ix += window_offset;
iy += window_offset;
q = VIPS_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
int fx, fy;
fx = FAST_PSEUDO_FLOOR( ix );
fy = FAST_PSEUDO_FLOOR( iy );
/* Clip against iarea.
*/
if( fx >= ile &&
fx < iri &&
fy >= ito &&
fy < ibo ) {
/* Verify that we can read the whole stencil.
* With DEBUG on this will range-check.
*/
g_assert( VIPS_REGION_ADDR( ir,
(int) ix - window_offset,
(int) iy - window_offset ) );
g_assert( VIPS_REGION_ADDR( ir,
(int) ix - window_offset +
window_size - 1,
(int) iy - window_offset +
window_size - 1 ) );
interpolate( affine->interpolate,
q, ir, ix, iy );
}
else {
for( z = 0; z < ps; z++ )
q[z] = 0;
}
ix += ddx;
iy += ddy;
q += ps;
}
}
VIPS_GATE_STOP( "vips_affine_gen: work" );
return( 0 );
}
static int
vips_mapim_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRect *r = &or->valid;
VipsRegion **ir = (VipsRegion **) seq;
const VipsImage **in_array = (const VipsImage **) a;
const VipsMapim *mapim = (VipsMapim *) b;
const VipsResample *resample = VIPS_RESAMPLE( mapim );
const VipsImage *in = in_array[0];
const int window_size =
vips_interpolate_get_window_size( mapim->interpolate );
const int window_offset =
vips_interpolate_get_window_offset( mapim->interpolate );
const VipsInterpolateMethod interpolate =
vips_interpolate_get_method( mapim->interpolate );
const int ps = VIPS_IMAGE_SIZEOF_PEL( in );
const int clip_width = resample->in->Xsize;
const int clip_height = resample->in->Ysize;
VipsRect bounds, image, clipped;
int x, y, z;
#ifdef DEBUG_VERBOSE
printf( "vips_mapim_gen: "
"generating left=%d, top=%d, width=%d, height=%d\n",
r->left,
r->top,
r->width,
r->height );
#endif /*DEBUG_VERBOSE*/
/* Fetch the chunk of the mapim image we need, and find the max/min in
* x and y.
*/
if( vips_region_prepare( ir[1], r ) )
return( -1 );
VIPS_GATE_START( "vips_mapim_gen: work" );
vips_mapim_region_minmax( ir[1], r, &bounds );
VIPS_GATE_STOP( "vips_mapim_gen: work" );
/* The bounding box of that area is what we will need from @in. Add
* enough for the interpolation stencil as well.
*
*/
bounds.width += window_size - 1;
bounds.height += window_size - 1;
/* Clip against the expanded image.
*/
image.left = 0;
image.top = 0;
image.width = in->Xsize;
image.height = in->Ysize;
vips_rect_intersectrect( &bounds, &image, &clipped );
#ifdef DEBUG_VERBOSE
printf( "vips_mapim_gen: "
"preparing left=%d, top=%d, width=%d, height=%d\n",
clipped.left,
clipped.top,
clipped.width,
clipped.height );
#endif /*DEBUG_VERBOSE*/
if( vips_rect_isempty( &clipped ) ) {
vips_region_black( or );
return( 0 );
}
if( vips_region_prepare( ir[0], &clipped ) )
return( -1 );
VIPS_GATE_START( "vips_mapim_gen: work" );
/* Resample! x/y loop over pixels in the output image (5).
*/
for( y = 0; y < r->height; y++ ) {
VipsPel * restrict p =
VIPS_REGION_ADDR( ir[1], r->left, y + r->top );
VipsPel * restrict q =
VIPS_REGION_ADDR( or, r->left, y + r->top );
switch( ir[1]->im->BandFmt ) {
case VIPS_FORMAT_UCHAR:
ULOOKUP( unsigned char ); break;
case VIPS_FORMAT_CHAR:
LOOKUP( signed char ); break;
case VIPS_FORMAT_USHORT:
ULOOKUP( unsigned short ); break;
case VIPS_FORMAT_SHORT:
LOOKUP( signed short ); break;
case VIPS_FORMAT_UINT:
ULOOKUP( unsigned int ); break;
case VIPS_FORMAT_INT:
LOOKUP( signed int ); break;
case VIPS_FORMAT_FLOAT:
case VIPS_FORMAT_COMPLEX:
LOOKUP( float ); break;
break;
case VIPS_FORMAT_DOUBLE:
case VIPS_FORMAT_DPCOMPLEX:
LOOKUP( double ); break;
default:
g_assert_not_reached();
}
}
VIPS_GATE_STOP( "vips_mapim_gen: work" );
return( 0 );
}
/* A new strip has arrived! The strip has at least enough pixels in to
* write a line of tiles or a set of scanlines.
*
* - write a line of tiles / set of scanlines
* - shrink what we can to the layer below
* - move our strip down by the tile height
* - copy the overlap with the previous strip
*/
static int
layer_strip_arrived( Layer *layer )
{
Write *write = layer->write;
int result;
VipsRect new_strip;
VipsRect overlap;
VipsRect image_area;
if( write->tile )
result = layer_write_tile( write, layer, layer->strip );
else
result = layer_write_strip( write, layer, layer->strip );
if( result )
return( -1 );
if( layer->below &&
layer_strip_shrink( layer ) )
return( -1 );
/* Position our strip down the image.
*
* Expand the strip if necessary to make sure we have an even
* number of lines.
*/
layer->y += write->tileh;
new_strip.left = 0;
new_strip.top = layer->y;
new_strip.width = layer->image->Xsize;
new_strip.height = write->tileh;
image_area.left = 0;
image_area.top = 0;
image_area.width = layer->image->Xsize;
image_area.height = layer->image->Ysize;
vips_rect_intersectrect( &new_strip, &image_area, &new_strip );
if( (new_strip.height & 1) == 1 )
new_strip.height += 1;
/* What pixels that we will need do we already have? Save them in
* overlap.
*/
vips_rect_intersectrect( &new_strip, &layer->strip->valid, &overlap );
if( !vips_rect_isempty( &overlap ) ) {
if( vips_region_buffer( layer->copy, &overlap ) )
return( -1 );
vips_region_copy( layer->strip, layer->copy,
&overlap, overlap.left, overlap.top );
}
if( !vips_rect_isempty( &new_strip ) ) {
if( vips_region_buffer( layer->strip, &new_strip ) )
return( -1 );
/* And copy back again.
*/
if( !vips_rect_isempty( &overlap ) )
vips_region_copy( layer->copy, layer->strip,
&overlap, overlap.left, overlap.top );
}
return( 0 );
}
/* Shrink what pixels we can from this strip into the layer below. If the
* strip below fills, recurse.
*/
static int
layer_strip_shrink( Layer *layer )
{
Layer *below = layer->below;
VipsRegion *from = layer->strip;
VipsRegion *to = below->strip;
VipsRect target;
VipsRect source;
/* Our pixels might cross a strip boundary in the layer below, so we
* have to write repeatedly until we run out of pixels.
*/
for(;;) {
/* The pixels the layer below needs.
*/
target.left = 0;
target.top = below->write_y;
target.width = below->image->Xsize;
target.height = to->valid.height;
vips_rect_intersectrect( &target, &to->valid, &target );
/* Those pixels need this area of this layer.
*/
source.left = target.left * 2;
source.top = target.top * 2;
source.width = target.width * 2;
source.height = target.height * 2;
/* Of which we have these available.
*/
vips_rect_intersectrect( &source, &from->valid, &source );
/* So these are the pixels in the layer below we can provide.
*/
target.left = source.left / 2;
target.top = source.top / 2;
target.width = source.width / 2;
target.height = source.height / 2;
/* None? All done.
*/
if( vips_rect_isempty( &target ) )
break;
(void) vips_region_shrink( from, to, &target );
below->write_y += target.height;
/* If we've filled the strip below, let it know.
* We can either fill the region, if it's somewhere half-way
* down the image, or, if it's at the bottom, get to the last
* real line of pixels.
*/
if( below->write_y == VIPS_RECT_BOTTOM( &to->valid ) ||
below->write_y == below->height ) {
if( layer_strip_arrived( below ) )
return( -1 );
}
}
return( 0 );
}
static ReadSlide *
readslide_new( const char *filename, VipsImage *out,
int level, gboolean autocrop, const char *associated )
{
ReadSlide *rslide;
int64_t w, h;
const char *error;
const char *background;
const char * const *properties;
char *associated_names;
if( level &&
associated ) {
vips_error( "openslide2vips",
"%s", _( "specify only one of level or associated "
"image" ) );
return( NULL );
}
rslide = VIPS_NEW( out, ReadSlide );
memset( rslide, 0, sizeof( *rslide ) );
g_signal_connect( out, "close", G_CALLBACK( readslide_destroy_cb ),
rslide );
rslide->level = level;
rslide->autocrop = autocrop;
rslide->associated = g_strdup( associated );
/* Non-crazy defaults, override below if we can.
*/
rslide->tile_width = 256;
rslide->tile_height = 256;
rslide->osr = openslide_open( filename );
if( rslide->osr == NULL ) {
vips_error( "openslide2vips",
"%s", _( "unsupported slide format" ) );
return( NULL );
}
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "opening slide: %s" ), error );
return( NULL );
}
if( level < 0 ||
level >= openslide_get_level_count( rslide->osr ) ) {
vips_error( "openslide2vips",
"%s", _( "invalid slide level" ) );
return( NULL );
}
if( associated &&
check_associated_image( rslide->osr, associated ) )
return( NULL );
if( associated ) {
openslide_get_associated_image_dimensions( rslide->osr,
associated, &w, &h );
vips_image_set_string( out, "slide-associated-image",
associated );
vips_image_pipelinev( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
}
else {
char buf[256];
const char *value;
openslide_get_level_dimensions( rslide->osr,
level, &w, &h );
rslide->downsample = openslide_get_level_downsample(
rslide->osr, level );
vips_image_set_int( out, "slide-level", level );
vips_image_pipelinev( out, VIPS_DEMAND_STYLE_SMALLTILE, NULL );
/* Try to get tile width/height. An undocumented, experimental
* feature.
*/
vips_snprintf( buf, 256,
"openslide.level[%d].tile-width", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_width = atoi( value );
vips_snprintf( buf, 256,
"openslide.level[%d].tile-height", level );
if( (value = openslide_get_property_value( rslide->osr, buf )) )
rslide->tile_height = atoi( value );
if( value )
VIPS_DEBUG_MSG( "readslide_new: found tile-size\n" );
/* Some images have a bounds in the header. Crop to
* that if autocrop is set.
*/
if( rslide->autocrop )
if( !get_bounds( rslide->osr, &rslide->bounds ) )
rslide->autocrop = FALSE;
if( rslide->autocrop ) {
VipsRect image;
rslide->bounds.left /= rslide->downsample;
rslide->bounds.top /= rslide->downsample;
rslide->bounds.width /= rslide->downsample;
rslide->bounds.height /= rslide->downsample;
/* Clip against image size.
*/
image.left = 0;
image.top = 0;
image.width = w;
image.height = h;
vips_rect_intersectrect( &rslide->bounds, &image,
&rslide->bounds );
/* If we've clipped to nothing, ignore bounds.
*/
if( vips_rect_isempty( &rslide->bounds ) )
rslide->autocrop = FALSE;
}
if( rslide->autocrop ) {
w = rslide->bounds.width;
h = rslide->bounds.height;
}
}
rslide->bg = 0xffffff;
if( (background = openslide_get_property_value( rslide->osr,
OPENSLIDE_PROPERTY_NAME_BACKGROUND_COLOR )) )
rslide->bg = strtoul( background, NULL, 16 );
if( w <= 0 ||
h <= 0 ||
rslide->downsample < 0 ) {
vips_error( "openslide2vips", _( "getting dimensions: %s" ),
openslide_get_error( rslide->osr ) );
return( NULL );
}
if( w > INT_MAX ||
h > INT_MAX ) {
vips_error( "openslide2vips",
"%s", _( "image dimensions overflow int" ) );
return( NULL );
}
if( !rslide->autocrop ) {
rslide->bounds.left = 0;
rslide->bounds.top = 0;
rslide->bounds.width = w;
rslide->bounds.height = h;
}
vips_image_init_fields( out, w, h, 4, VIPS_FORMAT_UCHAR,
VIPS_CODING_NONE, VIPS_INTERPRETATION_RGB, 1.0, 1.0 );
for( properties = openslide_get_property_names( rslide->osr );
*properties != NULL; properties++ )
vips_image_set_string( out, *properties,
openslide_get_property_value( rslide->osr,
*properties ) );
associated_names = g_strjoinv( ", ", (char **)
openslide_get_associated_image_names( rslide->osr ) );
vips_image_set_string( out,
"slide-associated-images", associated_names );
VIPS_FREE( associated_names );
return( rslide );
}
static int
vips_draw_rect_build( VipsObject *object )
{
VipsDraw *draw = VIPS_DRAW( object );
VipsDrawink *drawink = VIPS_DRAWINK( object );
VipsArea *ink = VIPS_AREA( drawink->ink );
VipsDrawRect *draw_rect = (VipsDrawRect *) object;
int left = draw_rect->left;
int top = draw_rect->top;
int width = draw_rect->width;
int height = draw_rect->height;
VipsRect image;
VipsRect rect;
VipsRect clip;
if( VIPS_OBJECT_CLASS( vips_draw_rect_parent_class )->build( object ) )
return( -1 );
/* Also use a solid fill for very narrow unfilled rects.
*/
if( !draw_rect->fill &&
width > 2 &&
height > 2 )
return( vips_draw_rect( draw->image,
ink->data, ink->n,
left, top, width, 1, NULL ) ||
vips_draw_rect( draw->image,
ink->data, ink->n,
left + width - 1, top, 1, height, NULL ) ||
vips_draw_rect( draw->image,
ink->data, ink->n,
left, top + height - 1, width, 1, NULL ) ||
vips_draw_rect( draw->image,
ink->data, ink->n,
left, top, 1, height, NULL ) );
image.left = 0;
image.top = 0;
image.width = draw->image->Xsize;
image.height = draw->image->Ysize;
rect.left = left;
rect.top = top;
rect.width = width;
rect.height = height;
vips_rect_intersectrect( &rect, &image, &clip );
if( !vips_rect_isempty( &clip ) ) {
VipsPel *to =
VIPS_IMAGE_ADDR( draw->image, clip.left, clip.top );
VipsPel *q;
int x, y;
/* We plot the first line pointwise, then memcpy() it for the
* subsequent lines.
*/
q = to;
for( x = 0; x < clip.width; x++ ) {
vips__drawink_pel( drawink, q );
q += draw->psize;
}
q = to + draw->lsize;
for( y = 1; y < clip.height; y++ ) {
memcpy( q, to, clip.width * draw->psize );
q += draw->lsize;
}
}
return( 0 );
}
static int
vips_affine_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
const VipsAffine *affine = (VipsAffine *) b;
const VipsImage *in = (VipsImage *) a;
const int window_size =
vips_interpolate_get_window_size( affine->interpolate );
const int window_offset =
vips_interpolate_get_window_offset( affine->interpolate );
const VipsInterpolateMethod interpolate =
vips_interpolate_get_method( affine->interpolate );
/* Area we generate in the output image.
*/
const VipsRect *r = &or->valid;
const int le = r->left;
const int ri = VIPS_RECT_RIGHT( r );
const int to = r->top;
const int bo = VIPS_RECT_BOTTOM( r );
const VipsRect *iarea = &affine->trn.iarea;
const VipsRect *oarea = &affine->trn.oarea;
int ps = VIPS_IMAGE_SIZEOF_PEL( in );
int x, y, z;
VipsRect image, want, need, clipped;
#ifdef DEBUG
printf( "affine: generating left=%d, top=%d, width=%d, height=%d\n",
r->left,
r->top,
r->width,
r->height );
#endif /*DEBUG*/
/* We are generating this chunk of the transformed image.
*/
want = *r;
want.left += oarea->left;
want.top += oarea->top;
/* Find the area of the input image we need.
*/
vips__transform_invert_rect( &affine->trn, &want, &need );
/* That does round-to-nearest, because it has to stop rounding errors
* growing images unexpectedly. We need round-down, so we must
* add half a pixel along the left and top. But we are int :( so add 1
* pixel.
*
* Add an extra line along the right and bottom as well, for rounding.
*/
vips_rect_marginadjust( &need, 1 );
/* Now go to space (2) above.
*/
need.left += iarea->left;
need.top += iarea->top;
/* Add a border for interpolation.
*/
need.width += window_size - 1;
need.height += window_size - 1;
need.left -= window_offset;
need.top -= window_offset;
/* Clip against the size of (2).
*/
image.left = 0;
image.top = 0;
image.width = in->Xsize;
image.height = in->Ysize;
vips_rect_intersectrect( &need, &image, &clipped );
/* Outside input image? All black.
*/
if( vips_rect_isempty( &clipped ) ) {
vips_region_black( or );
return( 0 );
}
/* We do need some pixels from the input image to make our output -
* ask for them.
*/
if( vips_region_prepare( ir, &clipped ) )
return( -1 );
#ifdef DEBUG
printf( "affine: preparing left=%d, top=%d, width=%d, height=%d\n",
clipped.left,
clipped.top,
clipped.width,
clipped.height );
#endif /*DEBUG*/
/* Resample! x/y loop over pixels in the output image (5).
*/
for( y = to; y < bo; y++ ) {
/* Input clipping rectangle.
*/
const int ile = iarea->left;
const int ito = iarea->top;
const int iri = iarea->left + iarea->width;
const int ibo = iarea->top + iarea->height;
/* Derivative of matrix.
*/
const double ddx = affine->trn.ia;
const double ddy = affine->trn.ic;
/* Continuous cods in transformed space.
*/
const double ox = le + oarea->left - affine->trn.odx;
const double oy = y + oarea->top - affine->trn.ody;
/* Continuous cods in input space.
*/
double ix, iy;
VipsPel *q;
/* To (3).
*/
ix = affine->trn.ia * ox + affine->trn.ib * oy;
iy = affine->trn.ic * ox + affine->trn.id * oy;
/* Now move to (2).
*/
ix += iarea->left;
iy += iarea->top;
/* And the input offset.
*/
ix -= affine->trn.idx;
iy -= affine->trn.idy;
q = VIPS_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
int fx, fy;
fx = FAST_PSEUDO_FLOOR( ix );
fy = FAST_PSEUDO_FLOOR( iy );
/* Clipping!
*/
if( fx < ile || fx >= iri || fy < ito || fy >= ibo ) {
for( z = 0; z < ps; z++ )
q[z] = 0;
}
else {
interpolate( affine->interpolate,
q, ir, ix, iy );
}
ix += ddx;
iy += ddy;
q += ps;
}
}
return( 0 );
}
