/* Set output area of trn so that it just holds all of our input pels.
*/
void
im__transform_set_area( Transformation *trn )
{
double xA, xB, xC, xD;
double yA, yB, yC, yD;
int xmin, xmax, ymin, ymax;
im__transform_forward( trn,
trn->iarea.left, trn->iarea.top,
&xA, &yA );
im__transform_forward( trn,
IM_RECT_RIGHT( &trn->iarea ) - 1, trn->iarea.top,
&xB, &yB );
im__transform_forward( trn,
trn->iarea.left, IM_RECT_BOTTOM( &trn->iarea ) - 1,
&xC, &yC );
im__transform_forward( trn,
IM_RECT_RIGHT( &trn->iarea ) - 1,
IM_RECT_BOTTOM( &trn->iarea ) - 1,
&xD, &yD );
xmin = IM_MIN( xA, IM_MIN( xB, IM_MIN( xC, xD ) ) );
ymin = IM_MIN( yA, IM_MIN( yB, IM_MIN( yC, yD ) ) );
xmax = IM_MAX( xA, IM_MAX( xB, IM_MAX( xC, xD ) ) );
ymax = IM_MAX( yA, IM_MAX( yB, IM_MAX( yC, yD ) ) );
trn->oarea.left = xmin;
trn->oarea.top = ymin;
trn->oarea.width = xmax - xmin + 1;
trn->oarea.height = ymax - ymin + 1;
}
/* Transform a rect using a point transformer.
*/
static void
transform_rect( const Transformation *trn, transform_fn transform,
const Rect *in, /* In input space */
Rect *out ) /* In output space */
{
double x1, y1; /* Map corners */
double x2, y2;
double x3, y3;
double x4, y4;
double left, right, top, bottom;
/* Map input Rect.
*/
transform( trn, in->left, in->top, &x1, &y1 );
transform( trn, in->left, IM_RECT_BOTTOM( in ), &x3, &y3 );
transform( trn, IM_RECT_RIGHT( in ), in->top, &x2, &y2 );
transform( trn, IM_RECT_RIGHT( in ), IM_RECT_BOTTOM( in ), &x4, &y4 );
/* Find bounding box for these four corners. Round-to-nearest to try
* to stop rounding errors growing images.
*/
left = IM_MIN( x1, IM_MIN( x2, IM_MIN( x3, x4 ) ) );
right = IM_MAX( x1, IM_MAX( x2, IM_MAX( x3, x4 ) ) );
top = IM_MIN( y1, IM_MIN( y2, IM_MIN( y3, y4 ) ) );
bottom = IM_MAX( y1, IM_MAX( y2, IM_MAX( y3, y4 ) ) );
out->left = IM_RINT( left );
out->top = IM_RINT( top );
out->width = IM_RINT( right - left );
out->height = IM_RINT( bottom - top );
}
/* Flip a small area.
*/
static int
flip_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
Rect *r = &or->valid;
Rect in;
char *p, *q;
int x, y, z;
int le = r->left;
int ri = IM_RECT_RIGHT(r);
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int ps = IM_IMAGE_SIZEOF_PEL( ir->im ); /* sizeof pel */
int hgt = ir->im->Xsize - r->width;
int lastx;
/* Transform to input coordinates.
*/
in = *r;
in.left = hgt - r->left;
/* Find x of final pixel in input area.
*/
lastx = IM_RECT_RIGHT( &in ) - 1;
/* Ask for input we need.
*/
if( im_prepare( ir, &in ) )
return( -1 );
/* Loop, copying and reversing lines.
*/
for( y = to; y < bo; y++ ) {
p = IM_REGION_ADDR( ir, lastx, y );
q = IM_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
/* Copy the pel.
*/
for( z = 0; z < ps; z++ )
q[z] = p[z];
/* Skip forwards in out, back in in.
*/
q += ps;
p -= ps;
}
}
return( 0 );
}
/* Rotate a small piece.
*/
static int
rot270_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
IMAGE *in = (IMAGE *) a;
/* Output area.
*/
Rect *r = &or->valid;
int le = r->left;
int ri = IM_RECT_RIGHT(r);
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int x, y, i;
/* Pixel geometry.
*/
int ps, ls;
/* Find the area of the input image we need.
*/
Rect need;
need.left = in->Xsize - bo;
need.top = le;
need.width = r->height;
need.height = r->width;
if( im_prepare( ir, &need ) )
return( -1 );
/* Find PEL size and line skip for ir.
*/
ps = IM_IMAGE_SIZEOF_PEL( in );
ls = IM_REGION_LSKIP( ir );
/* Rotate the bit we now have.
*/
for( y = to; y < bo; y++ ) {
/* Start of this output line.
*/
PEL *q = (PEL *) IM_REGION_ADDR( or, le, y );
/* Corresponding position in ir.
*/
PEL *p = (PEL *) IM_REGION_ADDR( ir,
need.left + need.width - (y - to) - 1,
need.top );
for( x = le; x < ri; x++ ) {
for( i = 0; i < ps; i++ )
q[i] = p[i];
q += ps;
p += ls;
}
}
return( 0 );
}
/* Scroll to make an xywh area visible. If the area is larger than the
* viewport, position the view at the bottom left if the xywh area ...
* this is usually right for workspaces.
*/
void
workspaceview_scroll( Workspaceview *wview, int x, int y, int w, int h )
{
GtkAdjustment *hadj = gtk_scrolled_window_get_hadjustment(
GTK_SCROLLED_WINDOW( wview->window ) );
GtkAdjustment *vadj = gtk_scrolled_window_get_vadjustment(
GTK_SCROLLED_WINDOW( wview->window ) );
Rect *vp = &wview->vp;
int nx, ny;
nx = hadj->value;
if( x + w > IM_RECT_RIGHT( vp ) )
nx = IM_MAX( 0, (x + w) - vp->width );
if( x < nx )
nx = x;
ny = vadj->value;
if( y + h > IM_RECT_BOTTOM( vp ) )
ny = IM_MAX( 0, (y + h) - vp->height );
if( y < ny )
ny = y;
#ifdef DEBUG
printf( "workspaceview_scroll: x=%d, y=%d, w=%d, h=%d, "
"nx = %d, ny = %d\n", x, y, w, h, nx, ny );
#endif /*DEBUG*/
adjustments_set_value( hadj, vadj, nx, ny );
}
static int
vips_rot180_gen( VipsRegion *or, void *seq, void *a, void *b,
gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
VipsImage *in = (VipsImage *) a;
/* Output area.
*/
VipsRect *r = &or->valid;
int le = r->left;
int ri = IM_RECT_RIGHT(r);
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int x, y;
/* Pixel geometry.
*/
int ps;
/* Find the area of the input image we need.
*/
Rect need;
need.left = in->Xsize - ri;
need.top = in->Ysize - bo;
need.width = r->width;
need.height = r->height;
if( vips_region_prepare( ir, &need ) )
return( -1 );
/* Find PEL size and line skip for ir.
*/
ps = VIPS_IMAGE_SIZEOF_PEL( in );
/* Rotate the bit we now have.
*/
for( y = to; y < bo; y++ ) {
/* Start of this output line.
*/
VipsPel *q = VIPS_REGION_ADDR( or, le, y );
/* Corresponding position in ir.
*/
VipsPel *p = VIPS_REGION_ADDR( ir,
need.left + need.width - 1,
need.top + need.height - (y - to) - 1 );
/* Blap across!
*/
for( x = le; x < ri; x++ ) {
memcpy( q, p, ps );
q += ps;
p -= ps;
}
}
return( 0 );
}
/* Generate function.
*/
static int
make_vert_gen( REGION *or, void *seq, void *a, void *b )
{
IMAGE *in = (IMAGE *) a;
Rect *r = &or->valid;
int le = r->left;
int to = r->top;
int ri = IM_RECT_RIGHT( r );
int bo = IM_RECT_BOTTOM( r );
int nb = in->Bands;
int x, y, z;
for( y = to; y < bo; y++ ) {
VipsPel *q = IM_REGION_ADDR( or, le, y );
VipsPel *p = IM_IMAGE_ADDR( in, 0, y );
switch( in->BandFmt ) {
case IM_BANDFMT_UCHAR: VERT( unsigned char ); break;
case IM_BANDFMT_CHAR: VERT( signed char ); break;
case IM_BANDFMT_USHORT: VERT( unsigned short ); break;
case IM_BANDFMT_SHORT: VERT( signed short ); break;
case IM_BANDFMT_UINT: VERT( unsigned int ); break;
case IM_BANDFMT_INT: VERT( signed int ); break;
case IM_BANDFMT_FLOAT: VERT( float ); break;
case IM_BANDFMT_DOUBLE: VERT( double ); break;
default:
g_assert( 0 );
}
}
return( 0 );
}
/* Fastcor generate function.
*/
static int
fastcor_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
IMAGE *ref = (IMAGE *) b;
Rect irect;
Rect *r = &or->valid;
int le = r->left;
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int ri = IM_RECT_RIGHT(r);
int x, y, i, j;
int lsk;
/* What part of ir do we need?
*/
irect.left = or->valid.left;
irect.top = or->valid.top;
irect.width = or->valid.width + ref->Xsize - 1;
irect.height = or->valid.height + ref->Ysize - 1;
if( im_prepare( ir, &irect ) )
return( -1 );
lsk = IM_REGION_LSKIP( ir );
/* Loop over or.
*/
for( y = to; y < bo; y++ ) {
PEL *a = (PEL *) IM_REGION_ADDR( ir, le, y );
unsigned int *q = (unsigned int *) IM_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
int sum = 0;
PEL *b = (PEL *) ref->data;
PEL *a1 = a;
for( j = 0; j < ref->Ysize; j++ ) {
PEL *a2 = a1;
for( i = 0; i < ref->Xsize; i++ ) {
int t = *b++ - *a2++;
sum += t * t;
}
a1 += lsk;
}
*q++ = sum;
a += 1;
}
}
return( 0 );
}
static void
workspaceview_child_size_cb( Columnview *cview,
GtkAllocation *allocation, Workspaceview *wview )
{
Workspace *ws = WORKSPACE( VOBJECT( wview )->iobject );
Workspacegroup *wsg = workspace_get_workspacegroup( ws );
int right, bottom;
g_assert( IS_WORKSPACEVIEW( wview ) );
/* Compute a new bounding box for our children.
*/
wview->bounding.left = 0;
wview->bounding.top = 0;
wview->bounding.width = 0;
wview->bounding.height = 0;
(void) view_map( VIEW( wview ),
(view_map_fn) workspaceview_child_size_sub,
&wview->bounding, NULL );
wview->bounding.width += 1000;
wview->bounding.height += 1000;
#ifdef DEBUG
{
Column *col = COLUMN( VOBJECT( cview )->iobject );
printf( "workspaceview_child_size_cb: cview %s "
"bb left=%d, top=%d, width=%d, height=%d\n",
IOBJECT( col )->name,
wview->bounding.left,
wview->bounding.top,
wview->bounding.width,
wview->bounding.height );
}
#endif /*DEBUG*/
/* Resize our fixed if necessary.
*/
right = IM_RECT_RIGHT( &wview->bounding );
bottom = IM_RECT_BOTTOM( &wview->bounding );
if( right != wview->width || bottom != wview->height ) {
gtk_widget_set_size_request( GTK_WIDGET( wview->fixed ),
right, bottom );
/* Update the model hints ... it uses bounding to position
* loads and saves.
*/
ws->area = wview->bounding;
filemodel_set_offset( FILEMODEL( wsg ),
ws->area.left, ws->area.top );
}
}
/* Generate function.
*/
static int
make_horz_gen( REGION *or, void *seq, void *a, void *b )
{
IMAGE *in = (IMAGE *) a;
Rect *r = &or->valid;
int le = r->left;
int to = r->top;
int ri = IM_RECT_RIGHT( r );
int bo = IM_RECT_BOTTOM( r );
int nb = in->Bands;
int lsk = IM_REGION_LSKIP( or );
int ht = or->im->Ysize;
int x, y, z;
for( x = le; x < ri; x++ ) {
VipsPel *q = IM_REGION_ADDR( or, x, to );
VipsPel *p = IM_IMAGE_ADDR( in, x, 0 );
switch( in->BandFmt ) {
case IM_BANDFMT_UCHAR:
HORZ( unsigned char );
break;
case IM_BANDFMT_CHAR:
HORZ( signed char );
break;
case IM_BANDFMT_USHORT:
HORZ( unsigned short );
break;
case IM_BANDFMT_SHORT:
HORZ( signed short );
break;
case IM_BANDFMT_UINT:
HORZ( unsigned int );
break;
case IM_BANDFMT_INT:
HORZ( signed int );
break;
case IM_BANDFMT_FLOAT:
HORZ( float );
break;
case IM_BANDFMT_DOUBLE:
HORZ( double );
break;
default:
g_assert( 0 );
}
}
return( 0 );
}
/* Fetch one pixel at a time ... good for very large shrinks.
*/
static int
point_shrink_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
IMAGE *in = (IMAGE *) a;
SubsampleInfo *st = (SubsampleInfo *) b;
Rect *r = &or->valid;
int le = r->left;
int ri = IM_RECT_RIGHT( r );
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int ps = IM_IMAGE_SIZEOF_PEL( in );
Rect s;
int x, y;
int k;
/* Loop down the region.
*/
for( y = to; y < bo; y++ ) {
char *q = IM_REGION_ADDR( or, le, y );
char *p;
/* Loop across the region, in owidth sized pieces.
*/
for( x = le; x < ri; x++ ) {
/* Ask for input.
*/
s.left = x * st->xshrink;
s.top = y * st->yshrink;
s.width = 1;
s.height = 1;
if( im_prepare( ir, &s ) )
return( -1 );
/* Append new pels to output.
*/
p = IM_REGION_ADDR( ir, s.left, s.top );
for( k = 0; k < ps; k++ )
q[k] = p[k];
q += ps;
}
}
return( 0 );
}
/* Loop over the output region, filling with data from cache.
*/
static int
tile_cache_fill( REGION *out, void *seq, void *a, void *b )
{
REGION *in = (REGION *) seq;
Read *read = (Read *) b;
const int tw = read->tile_width;
const int th = read->tile_height;
Rect *r = &out->valid;
/* Find top left of tiles we need.
*/
int xs = (r->left / tw) * tw;
int ys = (r->top / th) * th;
int x, y;
g_mutex_lock( read->lock );
for( y = ys; y < IM_RECT_BOTTOM( r ); y += th )
for( x = xs; x < IM_RECT_RIGHT( r ); x += tw ) {
Tile *tile;
Rect tarea;
Rect hit;
if( !(tile = tile_find( read, in, x, y )) ) {
g_mutex_unlock( read->lock );
return( -1 );
}
/* The area of the tile.
*/
tarea.left = x;
tarea.top = y;
tarea.width = tw;
tarea.height = th;
/* The part of the tile that we need.
*/
im_rect_intersectrect( &tarea, r, &hit );
copy_region( tile->region, out, &hit );
}
g_mutex_unlock( read->lock );
return( 0 );
}
/* Bandjoin generate function.
*/
static int
bandjoin_gen( REGION *or, void *seq, void *a, void *b )
{
REGION **ir = (REGION **) seq;
Rect *r = &or->valid;
int le = r->left;
int ri = IM_RECT_RIGHT(r);
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int x, y, z;
int i1s = IM_IMAGE_SIZEOF_PEL( ir[0]->im );
int i2s = IM_IMAGE_SIZEOF_PEL( ir[1]->im );
/* Ask for input we need.
*/
if( im_prepare( ir[0], r ) )
return( -1 );
if( im_prepare( ir[1], r ) )
return( -1 );
/* Perform join.
*/
for( y = to; y < bo; y++ ) {
PEL *i1 = (PEL *) IM_REGION_ADDR( ir[0], le, y );
PEL *i2 = (PEL *) IM_REGION_ADDR( ir[1], le, y );
PEL *q = (PEL *) IM_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
/* Copy bytes from first file.
*/
for( z = 0; z < i1s; z++ )
*q++ = *i1++;
/* Copy bytes from in2.
*/
for( z = 0; z < i2s; z++ )
*q++ = *i2++;
}
}
return( 0 );
}
/* Generate function.
*/
static int
make_xy_gen( REGION *or, void *seq, void *a, void *b )
{
Rect *r = &or->valid;
int le = r->left;
int to = r->top;
int ri = IM_RECT_RIGHT( r );
int bo = IM_RECT_BOTTOM( r );
int x, y;
for( y = to; y < bo; y++ ) {
unsigned int *q = (unsigned int *) IM_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
q[0] = x;
q[1] = y;
q += 2;
}
}
return( 0 );
}
/* Loop over a big region, filling it in many small pieces with threads.
*/
static int
eval_to_region( REGION *or, im_threadgroup_t *tg )
{
Rect *r = &or->valid;
Rect image;
int x, y;
image.left = 0;
image.top = 0;
image.width = or->im->Xsize;
image.height = or->im->Ysize;
/* Note we'll be working to fill a contigious area.
*/
tg->inplace = 1;
/* Loop over or, attaching to all sub-parts in turn.
*/
for( y = r->top; y < IM_RECT_BOTTOM( r ); y += tg->ph )
for( x = r->left; x < IM_RECT_RIGHT( r ); x += tg->pw ) {
im_thread_t *thr;
Rect pos;
Rect clipped;
/* thrs appear on idle when the child thread does
* threadgroup_idle_add and hits the 'go' semaphore.
*/
thr = im_threadgroup_get( tg );
/* Set the position we want to generate with this
* thread. Clip against the size of the image and the
* space available in or.
*/
pos.left = x;
pos.top = y;
pos.width = tg->pw;
pos.height = tg->ph;
im_rect_intersectrect( &pos, &image, &clipped );
im_rect_intersectrect( &clipped, r, &clipped );
/* Note params and start work.
*/
thr->oreg = or;
thr->pos = clipped;
thr->x = clipped.left;
thr->y = clipped.top;
im_threadgroup_trigger( thr );
/* Check for errors.
*/
if( im_threadgroup_iserror( tg ) ) {
/* Don't kill threads yet ... we may want to
* get some error stuff out of them.
*/
im_threadgroup_wait( tg );
return( -1 );
}
}
/* Wait for all threads to hit 'go' again.
*/
im_threadgroup_wait( tg );
if( im_threadgroup_iserror( tg ) )
return( -1 );
return( 0 );
}
static int
stretch_gen( REGION *or, void *vseq, void *a, void *b )
{
SeqInfo *seq = (SeqInfo *) vseq;
StretchInfo *sin = (StretchInfo *) b;
REGION *ir = seq->ir;
Rect *r = &or->valid;
Rect r1;
int x, y;
/* What mask do we start with?
*/
int xstart = (r->left + sin->xoff) % 34;
/* What part of input do we need for this output?
*/
r1.left = r->left - (r->left + sin->xoff) / 34;
r1.top = r->top;
x = IM_RECT_RIGHT( r );
x = x - (x + sin->xoff) / 34 + 3;
r1.width = x - r1.left;
r1.height = r->height + 3;
if( im_prepare( ir, &r1 ) )
return( -1 );
/* Fill the first three lines of the buffer.
*/
for( y = 0; y < 3; y++ ) {
unsigned short *p = (unsigned short *)
IM_REGION_ADDR( ir, r1.left, y + r1.top );
unsigned short *q = seq->buf + seq->lsk*y;
make_xline( sin, p, q, r->width, xstart );
}
/* Loop for subsequent lines: stretch a new line of x pels, and
* interpolate a line of output from the 3 previous xes plus this new
* one.
*/
for( y = 0; y < r->height; y++ ) {
/* Next line of fresh input pels.
*/
unsigned short *p = (unsigned short *)
IM_REGION_ADDR( ir, r1.left, y + r1.top + 3 );
/* Next line we fill in the buffer.
*/
int boff = (y + 3)%4;
unsigned short *q = seq->buf + boff*seq->lsk;
/* Line we write in output.
*/
unsigned short *q1 = (unsigned short *)
IM_REGION_ADDR( or, r->left, y + r->top );
/* Process this new xline.
*/
make_xline( sin, p, q, r->width, xstart );
/* Generate new output line.
*/
make_yline( sin, seq->lsk, boff,
seq->buf, q1, r->width, sin->yoff );
}
return( 0 );
}
/* Shrink a REGION.
*/
static int
shrink_gen( REGION *or, void *vseq, void *a, void *b )
{
SeqInfo *seq = (SeqInfo *) vseq;
ShrinkInfo *st = (ShrinkInfo *) b;
REGION *ir = seq->ir;
Rect *r = &or->valid;
Rect s;
int le = r->left;
int ri = IM_RECT_RIGHT( r );
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int x, y, z, k;
/* What part of the input image do we need? Very careful: round left
* down, round right up.
*/
s.left = r->left * st->xshrink;
s.top = r->top * st->yshrink;
s.width = ceil( IM_RECT_RIGHT( r ) * st->xshrink ) - s.left;
s.height = ceil( IM_RECT_BOTTOM( r ) * st->yshrink ) - s.top;
if( im_prepare( ir, &s ) )
return( -1 );
/* Init offsets for pel addressing. Note that offsets must be for the
* type we will address the memory array with.
*/
for( z = 0, y = 0; y < st->mh; y++ )
for( x = 0; x < st->mw; x++ )
seq->off[z++] = (IM_REGION_ADDR( ir, x, y ) -
IM_REGION_ADDR( ir, 0, 0 )) /
IM_IMAGE_SIZEOF_ELEMENT( ir->im );
switch( ir->im->BandFmt ) {
case IM_BANDFMT_UCHAR:
ishrink(unsigned char);
break;
case IM_BANDFMT_CHAR:
ishrink(char);
break;
case IM_BANDFMT_USHORT:
ishrink(unsigned short);
break;
case IM_BANDFMT_SHORT:
ishrink(short);
break;
case IM_BANDFMT_UINT:
ishrink(unsigned int);
break;
case IM_BANDFMT_INT:
ishrink(int);
break;
case IM_BANDFMT_FLOAT:
fshrink(float);
break;
case IM_BANDFMT_DOUBLE:
fshrink(double);
break;
default:
im_error( "im_shrink", "%s", _( "unsupported input format" ) );
return( -1 );
}
return( 0 );
}
static int
affinei_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
const IMAGE *in = (IMAGE *) a;
const Affine *affine = (Affine *) b;
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 Rect *r = &or->valid;
const int le = r->left;
const int ri = IM_RECT_RIGHT( r );
const int to = r->top;
const int bo = IM_RECT_BOTTOM( r );
const Rect *iarea = &affine->trn.iarea;
const Rect *oarea = &affine->trn.oarea;
int ps = IM_IMAGE_SIZEOF_PEL( in );
int x, y, z;
Rect 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.
*/
im__transform_invert_rect( &affine->trn, &want, &need );
/* Now go to space (2) above.
*/
need.left += iarea->left;
need.top += iarea->top;
/* Add a border for interpolation. Plus one for rounding errors.
*/
im_rect_marginadjust( &need, window_offset + 1 );
/* Clip against the size of (2).
*/
image.left = 0;
image.top = 0;
image.width = in->Xsize;
image.height = in->Ysize;
im_rect_intersectrect( &need, &image, &clipped );
/* Outside input image? All black.
*/
if( im_rect_isempty( &clipped ) ) {
im_region_black( or );
return( 0 );
}
/* We do need some pixels from the input image to make our output -
* ask for them.
*/
if( im_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.dx;
const double oy = y + oarea->top - affine->trn.dy;
/* Continuous cods in input space.
*/
double ix, iy;
PEL *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;
q = (PEL *) IM_REGION_ADDR( or, le, y );
for( x = le; x < ri; x++ ) {
int fx, fy;
fx = FLOOR( ix );
fy = 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 );
}
/* Make first/last for oreg.
*/
static int
make_firstlast( MergeInfo *inf, Overlapping *ovlap, Rect *oreg )
{
REGION *rir = inf->rir;
REGION *sir = inf->sir;
Rect rr, sr;
int x;
int missing;
/* We're going to build first/last ... lock it from other generate
* threads. In fact it's harmless if we do get two writers, but we may
* avoid duplicating work.
*/
g_mutex_lock( ovlap->fl_lock );
/* Do we already have first/last for this area? Bail out if we do.
*/
missing = 0;
for( x = oreg->left; x < IM_RECT_RIGHT( oreg ); x++ ) {
const int j = x - ovlap->overlap.left;
const int first = ovlap->first[j];
if( first < 0 ) {
missing = 1;
break;
}
}
if( !missing ) {
/* No work to do!
*/
g_mutex_unlock( ovlap->fl_lock );
return( 0 );
}
/* Entire height of overlap in ref for oreg ... we know oreg is inside
* overlap.
*/
rr.left = oreg->left;
rr.top = ovlap->overlap.top;
rr.width = oreg->width;
rr.height = ovlap->overlap.height;
rr.left -= ovlap->rarea.left;
rr.top -= ovlap->rarea.top;
/* Same in sec.
*/
sr.left = oreg->left;
sr.top = ovlap->overlap.top;
sr.width = oreg->width;
sr.height = ovlap->overlap.height;
sr.left -= ovlap->sarea.left;
sr.top -= ovlap->sarea.top;
/* Make pixels.
*/
if( im_prepare( rir, &rr ) || im_prepare( sir, &sr ) ) {
g_mutex_unlock( ovlap->fl_lock );
return( -1 );
}
/* Make first/last cache.
*/
for( x = 0; x < oreg->width; x++ ) {
const int j = (x + oreg->left) - ovlap->overlap.left;
int *first = &ovlap->first[j];
int *last = &ovlap->last[j];
/* Done this line already?
*/
if( *first < 0 ) {
/* Search for top/bottom of overlap on this scan-line.
*/
if( find_top( sir, first,
x + sr.left, sr.top, sr.height ) ||
find_bot( rir, last,
x + rr.left, rr.top, rr.height ) ) {
g_mutex_unlock( ovlap->fl_lock );
return( -1 );
}
/* Translate to output space.
*/
*first += ovlap->sarea.top;
*last += ovlap->rarea.top;
/* Clip to maximum blend width, if necessary.
*/
if( ovlap->mwidth >= 0 &&
*last - *first > ovlap->mwidth ) {
int shrinkby = (*last - *first) - ovlap->mwidth;
*first += shrinkby / 2;
*last -= shrinkby / 2;
}
}
}
g_mutex_unlock( ovlap->fl_lock );
return( 0 );
}
static int
replicate_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
IMAGE *in = (IMAGE *) a;
Rect *r = &or->valid;
int twidth = in->Xsize;
int theight = in->Ysize;
int x, y;
Rect 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( im_rect_includesrect( &tile, r ) ) {
Rect irect;
/* Translate request to input space.
*/
irect = *r;
irect.left -= xs;
irect.top -= ys;
if( im_prepare( ir, &irect ) )
return( -1 );
if( im_region_region( or, ir, r, irect.left, irect.top ) )
return( -1 );
return( 0 );
}
for( y = ys; y < IM_RECT_BOTTOM( r ); y += theight )
for( x = xs; x < IM_RECT_RIGHT( r ); x += twidth ) {
Rect 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.
*/
im_rect_intersectrect( &tile, r, &paint );
/* Translate back to ir coordinates.
*/
paint.left -= x;
paint.top -= y;
g_assert( !im_rect_isempty( &paint ) );
/* Render into or.
*/
if( im_prepare_to( ir, or, &paint,
paint.left + x,
paint.top + y ) )
return( -1 );
}
return( 0 );
}
static int
affinei( IMAGE *in, IMAGE *out,
VipsInterpolate *interpolate, Transformation *trn )
{
Affine *affine;
double edge;
/* Make output image.
*/
if( im_piocheck( in, out ) )
return( -1 );
if( im_cp_desc( out, in ) )
return( -1 );
/* Need a copy of the params for the lifetime of out.
*/
if( !(affine = IM_NEW( out, Affine )) )
return( -1 );
affine->interpolate = NULL;
if( im_add_close_callback( out,
(im_callback_fn) affine_free, affine, NULL ) )
return( -1 );
affine->in = in;
affine->out = out;
affine->interpolate = interpolate;
g_object_ref( interpolate );
affine->trn = *trn;
if( im__transform_calc_inverse( &affine->trn ) )
return( -1 );
out->Xsize = affine->trn.oarea.width;
out->Ysize = affine->trn.oarea.height;
/* Normally SMALLTILE ... except if this is a size up/down affine.
*/
if( affine->trn.b == 0.0 && affine->trn.c == 0.0 ) {
if( im_demand_hint( out, IM_FATSTRIP, in, NULL ) )
return( -1 );
}
else {
if( im_demand_hint( out, IM_SMALLTILE, in, NULL ) )
return( -1 );
}
/* Check for coordinate overflow ... we want to be able to hold the
* output space inside INT_MAX / TRANSFORM_SCALE.
*/
edge = INT_MAX / VIPS_TRANSFORM_SCALE;
if( affine->trn.oarea.left < -edge || affine->trn.oarea.top < -edge ||
IM_RECT_RIGHT( &affine->trn.oarea ) > edge ||
IM_RECT_BOTTOM( &affine->trn.oarea ) > edge ) {
im_error( "im_affinei",
"%s", _( "output coordinates out of range" ) );
return( -1 );
}
/* Generate!
*/
if( im_generate( out,
im_start_one, affinei_gen, im_stop_one, in, affine ) )
return( -1 );
return( 0 );
}
/* Subsample a REGION. We fetch in IM_MAX_WIDTH pixel-wide strips, left-to-right
* across the input.
*/
static int
line_shrink_gen( REGION *or, void *seq, void *a, void *b )
{
REGION *ir = (REGION *) seq;
IMAGE *in = (IMAGE *) a;
SubsampleInfo *st = (SubsampleInfo *) b;
Rect *r = &or->valid;
int le = r->left;
int ri = IM_RECT_RIGHT( r );
int to = r->top;
int bo = IM_RECT_BOTTOM(r);
int ps = IM_IMAGE_SIZEOF_PEL( in );
int owidth = IM_MAX_WIDTH / st->xshrink;
Rect s;
int x, y;
int z, k;
/* Loop down the region.
*/
for( y = to; y < bo; y++ ) {
char *q = IM_REGION_ADDR( or, le, y );
char *p;
/* Loop across the region, in owidth sized pieces.
*/
for( x = le; x < ri; x += owidth ) {
/* How many pixels do we make this time?
*/
int ow = IM_MIN( owidth, ri - x );
/* Ask for this many from input ... can save a
* little here!
*/
int iw = ow * st->xshrink - (st->xshrink - 1);
/* Ask for input.
*/
s.left = x * st->xshrink;
s.top = y * st->yshrink;
s.width = iw;
s.height = 1;
if( im_prepare( ir, &s ) )
return( -1 );
/* Append new pels to output.
*/
p = IM_REGION_ADDR( ir, s.left, s.top );
for( z = 0; z < ow; z++ ) {
for( k = 0; k < ps; k++ )
q[k] = p[k];
q += ps;
p += ps * st->xshrink;
}
}
}
return( 0 );
}
