static int
vips_shrink_gen( VipsRegion *or, void *vseq, void *a, void *b, gboolean *stop )
{
VipsShrinkSequence *seq = (VipsShrinkSequence *) vseq;
VipsShrink *shrink = (VipsShrink *) b;
VipsRegion *ir = seq->ir;
VipsRect *r = &or->valid;
/* How do we chunk up the image? We don't want to prepare the whole of
* the input region corresponding to *r since it could be huge.
*
* Each pixel of *r will depend on roughly mw x mh
* pixels, so we walk *r in chunks which map to the tile size.
*
* Make sure we can't ask for a zero step.
*/
int xstep = shrink->mw > VIPS__TILE_WIDTH ?
1 : VIPS__TILE_WIDTH / shrink->mw;
int ystep = shrink->mh > VIPS__TILE_HEIGHT ?
1 : VIPS__TILE_HEIGHT / shrink->mh;
int x, y;
#ifdef DEBUG
printf( "vips_shrink_gen: generating %d x %d at %d x %d\n",
r->width, r->height, r->left, r->top );
#endif /*DEBUG*/
for( y = 0; y < r->height; y += ystep )
for( x = 0; x < r->width; x += xstep ) {
/* Clip the this rect against the demand size.
*/
int width = VIPS_MIN( xstep, r->width - x );
int height = VIPS_MIN( ystep, r->height - y );
VipsRect s;
s.left = (r->left + x) * shrink->xshrink;
s.top = (r->top + y) * shrink->yshrink;
s.width = ceil( width * shrink->xshrink );
s.height = ceil( height * shrink->yshrink );
#ifdef DEBUG
printf( "shrink_gen: requesting %d x %d at %d x %d\n",
s.width, s.height, s.left, s.top );
#endif /*DEBUG*/
if( vips_region_prepare( ir, &s ) )
return( -1 );
vips_shrink_gen2( shrink, seq,
or, ir,
r->left + x, r->top + y, width, height );
}
return( 0 );
}
/* Return a ref to a window that encloses top/height.
*/
VipsWindow *
vips_window_ref( IMAGE *im, int top, int height )
{
VipsWindow *window;
g_mutex_lock( im->sslock );
if( !(window = vips_window_find( im, top, height )) ) {
/* No existing window ... make a new one. Ask for a larger
* window than we strictly need. There's no point making tiny
* windows.
*/
int margin = VIPS_MIN( vips__window_margin_pixels,
vips__window_margin_bytes /
VIPS_IMAGE_SIZEOF_LINE( im ) );
top -= margin;
height += margin * 2;
top = VIPS_CLIP( 0, top, im->Ysize - 1 );
height = VIPS_CLIP( 0, height, im->Ysize - top );
if( !(window = vips_window_new( im, top, height )) ) {
g_mutex_unlock( im->sslock );
return( NULL );
}
}
g_mutex_unlock( im->sslock );
return( window );
}
static int
vips_shrink_gen( VipsRegion *or, void *vseq, void *a, void *b, gboolean *stop )
{
VipsShrinkSequence *seq = (VipsShrinkSequence *) vseq;
VipsShrink *shrink = (VipsShrink *) b;
VipsRegion *ir = seq->ir;
VipsRect *r = &or->valid;
/* How do we chunk up the image? We don't want to prepare the whole of
* the input region corresponding to *r since it could be huge.
*
* Each pixel of *r will depend on roughly mw x mh
* pixels, so we walk *r in chunks which map to the tile size.
*
* Make sure we can't ask for a zero step.
*
* We don't chunk horizontally. We want "vips shrink x.jpg b.jpg 100
* 100" to run sequentially. If we chunk horizontally, we will fetch
* 100x100 lines from the top of the image, then 100x100 100 lines
* down, etc. for each thread, then when they've finished, fetch
* 100x100, 100 pixels across from the top of the image. This will
* break sequentiality.
*/
int ystep = shrink->mh > VIPS__TILE_HEIGHT ?
1 : VIPS__TILE_HEIGHT / shrink->mh;
int y;
#ifdef DEBUG
printf( "vips_shrink_gen: generating %d x %d at %d x %d\n",
r->width, r->height, r->left, r->top );
#endif /*DEBUG*/
for( y = 0; y < r->height; y += ystep ) {
/* Clip the this rect against the demand size.
*/
int height = VIPS_MIN( ystep, r->height - y );
VipsRect s;
s.left = r->left * shrink->xshrink;
s.top = (r->top + y) * shrink->yshrink;
s.width = ceil( r->width * shrink->xshrink );
s.height = ceil( height * shrink->yshrink );
#ifdef DEBUG
printf( "shrink_gen: requesting %d x %d at %d x %d\n",
s.width, s.height, s.left, s.top );
#endif /*DEBUG*/
if( vips_region_prepare( ir, &s ) )
return( -1 );
vips_shrink_gen2( shrink, seq,
or, ir,
r->left, r->top + y, r->width, height );
}
return( 0 );
}
static int
read_jpeg_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRect *r = &or->valid;
ReadJpeg *jpeg = (ReadJpeg *) a;
struct jpeg_decompress_struct *cinfo = &jpeg->cinfo;
int sz = cinfo->output_width * cinfo->output_components;
int y;
#ifdef DEBUG
printf( "read_jpeg_generate: line %d, %d rows\n",
r->top, r->height );
#endif /*DEBUG*/
/* We're inside a tilecache where tiles are the full image width, so
* this should always be true.
*/
g_assert( r->left == 0 );
g_assert( r->width == or->im->Xsize );
g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
/* Tiles should always be on a 8-pixel boundary.
*/
g_assert( r->top % 8 == 0 );
/* Tiles should always be a strip in height, unless it's the final
* strip.
*/
g_assert( r->height == VIPS_MIN( 8, or->im->Ysize - r->top ) );
/* Here for longjmp() from vips__new_error_exit().
*/
if( setjmp( jpeg->eman.jmp ) )
return( -1 );
for( y = 0; y < r->height; y++ ) {
JSAMPROW row_pointer[1];
row_pointer[0] = (JSAMPLE *)
VIPS_REGION_ADDR( or, 0, r->top + y );
jpeg_read_scanlines( cinfo, &row_pointer[0], 1 );
if( jpeg->invert_pels ) {
int x;
for( x = 0; x < sz; x++ )
row_pointer[0][x] = 255 - row_pointer[0][x];
}
}
return( 0 );
}
static int
png2vips_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRect *r = &or->valid;
Read *read = (Read *) a;
int y;
#ifdef DEBUG
printf( "png2vips_generate: line %d, %d rows\n",
r->top, r->height );
#endif /*DEBUG*/
/* We're inside a tilecache where tiles are the full image width, so
* this should always be true.
*/
g_assert( r->left == 0 );
g_assert( r->width == or->im->Xsize );
g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
/* Tiles should always be a strip in height, unless it's the final
* strip.
*/
g_assert( r->height == VIPS_MIN( 8, or->im->Ysize - r->top ) );
/* And check that y_pos is correct. It should be, since we are inside
* a vips_sequential().
*/
g_assert( r->top == read->y_pos );
for( y = 0; y < r->height; y++ ) {
png_bytep q = (png_bytep) VIPS_REGION_ADDR( or, 0, r->top + y );
/* We need to catch and ignore errors from read_row().
*/
if( !setjmp( png_jmpbuf( read->pPng ) ) )
png_read_row( read->pPng, q, NULL );
else {
#ifdef DEBUG
printf( "png2vips_generate: png_read_row() failed, "
"line %d\n", r->top + y );
printf( "png2vips_generate: file %s\n", read->name );
printf( "png2vips_generate: thread %p\n",
g_thread_self() );
#endif /*DEBUG*/
}
read->y_pos += 1;
}
return( 0 );
}
static int
vips__openslide_generate( VipsRegion *out,
void *seq, void *_rslide, void *unused, gboolean *stop )
{
ReadSlide *rslide = _rslide;
VipsRect *r = &out->valid;
const char *error;
int x, y;
VIPS_DEBUG_MSG( "vips__openslide_generate: %dx%d @ %dx%d\n",
r->width, r->height, r->left, r->top );
/* Fill in tile-sized chunks. Some versions of OpenSlide can fail for
* very large requests.
*/
for( y = 0; y < r->height; y += TILE_HEIGHT )
for( x = 0; x < r->width; x += TILE_WIDTH ) {
int w = VIPS_MIN( TILE_WIDTH, r->width - x );
int h = VIPS_MIN( TILE_HEIGHT, r->height - y );
openslide_read_region( rslide->osr,
(uint32_t *) VIPS_REGION_ADDR( out,
r->left + x, r->top + y ),
(r->left + x) * rslide->downsample,
(r->top + y) * rslide->downsample,
rslide->layer,
w, h );
}
error = openslide_get_error( rslide->osr );
if( error ) {
vips_error( "openslide2vips",
_( "reading region: %s" ), error );
return( -1 );
}
return( 0 );
}
/* Save an exif value to a string in a way that we can restore. We only bother
* for the simple formats (that a client might try to change) though.
*
* Keep in sync with vips_exif_from_s() below.
*/
static void
vips_exif_to_s( ExifData *ed, ExifEntry *entry, VipsBuf *buf )
{
unsigned long i;
int iv;
ExifRational rv;
ExifSRational srv;
char txt[256];
if( entry->format == EXIF_FORMAT_ASCII ) {
/* libexif does not null-terminate strings. Copy out and add
* the \0 ourselves.
*/
int len = VIPS_MIN( 254, entry->size );
memcpy( txt, entry->data, len );
txt[len] = '\0';
vips_buf_appendf( buf, "%s ", txt );
}
else if( entry->components < 10 &&
!vips_exif_get_int( ed, entry, 0, &iv ) ) {
for( i = 0; i < entry->components; i++ ) {
vips_exif_get_int( ed, entry, i, &iv );
vips_buf_appendf( buf, "%d ", iv );
}
}
else if( entry->components < 10 &&
!vips_exif_get_rational( ed, entry, 0, &rv ) ) {
for( i = 0; i < entry->components; i++ ) {
vips_exif_get_rational( ed, entry, i, &rv );
vips_buf_appendf( buf, "%u/%u ",
rv.numerator, rv.denominator );
}
}
else if( entry->components < 10 &&
!vips_exif_get_srational( ed, entry, 0, &srv ) ) {
for( i = 0; i < entry->components; i++ ) {
vips_exif_get_srational( ed, entry, i, &srv );
vips_buf_appendf( buf, "%d/%d ",
srv.numerator, srv.denominator );
}
}
else
vips_buf_appendf( buf, "%s ",
exif_entry_get_value( entry, txt, 256 ) );
vips_buf_appendf( buf, "(%s, %s, %lu components, %d bytes)",
exif_entry_get_value( entry, txt, 256 ),
exif_format_get_name( entry->format ),
entry->components,
entry->size );
}
/* Fetch a token. If it's a string token terminated by a '[', fetch up to the
* matching ']' as well, for example ".jpg[Q=90]".
*
* Return NULL for end of tokens.
*/
const char *
vips__token_segment( const char *p, VipsToken *token,
char *string, int size )
{
const char *q;
if( !(q = vips__token_must( p, token, string, size )) )
return( NULL );
/* If we stopped on [, read up to the matching ].
*/
if( *token == VIPS_TOKEN_STRING &&
q[0] == '[' ) {
VipsToken sub_token;
char sub_string[VIPS_PATH_MAX];
int depth;
int i;
depth = 0;
do {
if( !(q = vips__token_must( q, &sub_token,
sub_string, VIPS_PATH_MAX )) )
return( NULL );
switch( sub_token ) {
case VIPS_TOKEN_LEFT:
depth += 1;
break;
case VIPS_TOKEN_RIGHT:
depth -= 1;
break;
default:
break;
}
} while( !(sub_token == VIPS_TOKEN_RIGHT && depth == 0) );
i = VIPS_MIN( q - p, size );
vips_strncpy( string, p, i + 1 );
}
return( q );
}
/* Write tileh scanlines, less for the last strip.
*/
static int
layer_write_strip( Write *write, Layer *layer, VipsRegion *strip )
{
VipsImage *im = layer->image;
VipsRect *area = &strip->valid;
int height = VIPS_MIN( write->tileh, area->height );
int y;
#ifdef DEBUG_VERBOSE
printf( "Writing %d pixel strip at height %d to image %s\n",
height, area->top, TIFFFileName( layer->tif ) );
#endif /*DEBUG_VERBOSE*/
for( y = 0; y < height; y++ ) {
VipsPel *p = VIPS_REGION_ADDR( strip, 0, area->top + y );
/* Any repacking necessary.
*/
if( im->Coding == VIPS_CODING_LABQ ) {
LabQ2LabC( write->tbuf, p, im->Xsize );
p = write->tbuf;
}
else if( im->BandFmt == VIPS_FORMAT_SHORT &&
im->Type == VIPS_INTERPRETATION_LABS ) {
LabS2Lab16( write->tbuf, p, im->Xsize );
p = write->tbuf;
}
else if( write->onebit ) {
eightbit2onebit( write, write->tbuf, p, im->Xsize );
p = write->tbuf;
}
else if( (im->Bands == 1 || im->Bands == 2) &&
write->miniswhite ) {
invert_band0( write, write->tbuf, p, im->Xsize );
p = write->tbuf;
}
if( TIFFWriteScanline( layer->tif, p, area->top + y, 0 ) < 0 )
return( -1 );
}
return( 0 );
}
static int
vips_worley_distance( VipsWorley *worley, Cell cells[9], int x, int y )
{
int distance;
int i, j;
distance = worley->cell_size * 1.5;
for( i = 0; i < 9; i++ ) {
Cell *cell = &cells[i];
for( j = 0; j < cell->n_features; j++ ) {
int d = vips_hypot(
x - cell->feature_x[j],
y - cell->feature_y[j] );
distance = VIPS_MIN( distance, d );
}
}
return( distance );
}
/* Calculate the shrink factors.
*
* We shrink in two stages: first, a shrink with a block average. This can
* only accurately shrink by integer factors. We then do a second shrink with
* a supplied interpolator to get the exact size we want.
*/
static int
calculate_shrink( int width, int height, double *residual )
{
/* Calculate the horizontal and vertical shrink we'd need to fit the
* image to the bounding box, and pick the biggest.
*
* In crop mode we aim to fill the bounding box, so we must use the
* smaller axis.
*/
double horizontal = (double) width / thumbnail_width;
double vertical = (double) height / thumbnail_height;
double factor = crop_image ?
VIPS_MIN( horizontal, vertical ) :
VIPS_MAX( horizontal, vertical );
/* If the shrink factor is <= 1.0, we need to zoom rather than shrink.
* Just set the factor to 1 in this case.
*/
double factor2 = factor < 1.0 ? 1.0 : factor;
/* Int component of shrink.
*/
int shrink = floor( factor2 );
if( residual ) {
/* Width after int shrink.
*/
int iwidth = width / shrink;
/* Therefore residual scale factor is.
*/
*residual = (width / factor) / iwidth;
}
return( shrink );
}
/* Subsample a VipsRegion. We fetch in VIPS_MAX_WIDTH pixel-wide strips,
* left-to-right across the input.
*/
static int
vips_subsample_line_gen( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
VipsSubsample *subsample = (VipsSubsample *) b;
VipsImage *in = (VipsImage *) a;
VipsRect *r = &or->valid;
int le = r->left;
int ri = VIPS_RECT_RIGHT( r );
int to = r->top;
int bo = VIPS_RECT_BOTTOM( r );
int ps = VIPS_IMAGE_SIZEOF_PEL( in );
int owidth = VIPS_MAX_WIDTH / subsample->xfac;
VipsRect s;
int x, y;
int z, k;
/* Loop down the region.
*/
for( y = to; y < bo; y++ ) {
VipsPel *q = VIPS_REGION_ADDR( or, le, y );
VipsPel *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 = VIPS_MIN( owidth, ri - x );
/* Ask for this many from input ... can save a
* little here!
*/
int iw = ow * subsample->xfac - (subsample->xfac - 1);
/* Ask for input.
*/
s.left = x * subsample->xfac;
s.top = y * subsample->yfac;
s.width = iw;
s.height = 1;
if( vips_region_prepare( ir, &s ) )
return( -1 );
/* Append new pels to output.
*/
p = VIPS_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 * subsample->xfac;
}
}
}
return( 0 );
}
/* Zoom a VipsRegion.
*/
static int
vips_zoom_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
{
VipsRegion *ir = (VipsRegion *) seq;
VipsZoom *zoom = (VipsZoom *) b;
/* Output area we are building.
*/
const VipsRect *r = &or->valid;
const int ri = VIPS_RECT_RIGHT( r );
const int bo = VIPS_RECT_BOTTOM(r);
VipsRect s;
int left, right, top, bottom;
int width, height;
/* Area of input we need. We have to round out, as we may have
* part-pixels all around the edges.
*/
left = ROUND_DOWN( r->left, zoom->xfac );
right = ROUND_UP( ri, zoom->xfac );
top = ROUND_DOWN( r->top, zoom->yfac );
bottom = ROUND_UP( bo, zoom->yfac );
width = right - left;
height = bottom - top;
s.left = left / zoom->xfac;
s.top = top / zoom->yfac;
s.width = width / zoom->xfac;
s.height = height / zoom->yfac;
if( vips_region_prepare( ir, &s ) )
return( -1 );
/* Find the part of the output (if any) which uses only whole pels.
*/
left = ROUND_UP( r->left, zoom->xfac );
right = ROUND_DOWN( ri, zoom->xfac );
top = ROUND_UP( r->top, zoom->yfac );
bottom = ROUND_DOWN( bo, zoom->yfac );
width = right - left;
height = bottom - top;
/* Stage 1: we just paint the whole pels in the centre of the region.
* As we know they are not clipped, we can do it quickly.
*/
if( width > 0 && height > 0 )
vips_zoom_paint_whole( or, ir, zoom, left, right, top, bottom );
/* Just fractional pixels left. Paint in the top, left, right and
* bottom parts.
*/
if( top - r->top > 0 )
/* Some top pixels.
*/
vips_zoom_paint_part( or, ir, zoom,
r->left, ri, r->top, VIPS_MIN( top, bo ) );
if( left - r->left > 0 && height > 0 )
/* Left pixels.
*/
vips_zoom_paint_part( or, ir, zoom,
r->left, VIPS_MIN( left, ri ), top, bottom );
if( ri - right > 0 && height > 0 )
/* Right pixels.
*/
vips_zoom_paint_part( or, ir, zoom,
VIPS_MAX( right, r->left ), ri, top, bottom );
if( bo - bottom > 0 && height >= 0 )
/* Bottom pixels.
*/
vips_zoom_paint_part( or, ir, zoom,
r->left, ri, VIPS_MAX( bottom, r->top ), bo );
return( 0 );
}
/* Paint the part of the region containing only part-pels.
*/
static void
vips_zoom_paint_part( VipsRegion *or, VipsRegion *ir, VipsZoom *zoom,
const int left, const int right, const int top, const int bottom )
{
const int ps = VIPS_IMAGE_SIZEOF_PEL( ir->im );
const int ls = VIPS_REGION_LSKIP( or );
const int rs = ps * (right - left);
/* Start position in input.
*/
const int ix = left / zoom->xfac;
const int iy = top / zoom->yfac;
/* Pels down to yfac boundary, pels down to bottom. Do the smallest of
* these for first y loop.
*/
const int ptbound = (iy + 1) * zoom->yfac - top;
const int ptbot = bottom - top;
int yt = VIPS_MIN( ptbound, ptbot );
int x, y, z, i;
/* Only know this.
*/
g_assert( right - left >= 0 && bottom - top >= 0 );
/* Have to loop over output.
*/
for( y = top; y < bottom; ) {
VipsPel *p = VIPS_REGION_ADDR( ir, ix, y / zoom->yfac );
VipsPel *q = VIPS_REGION_ADDR( or, left, y );
VipsPel *r;
/* Output pels until we jump the input pointer.
*/
int xt = (ix + 1) * zoom->xfac - left;
/* Loop for this output line.
*/
r = q;
for( x = left; x < right; x++ ) {
/* Copy 1 pel.
*/
for( i = 0; i < ps; i++ )
r[i] = p[i];
r += ps;
/* Move input if on boundary.
*/
--xt;
if( xt == 0 ) {
xt = zoom->xfac;
p += ps;
}
}
/* Repeat that output line until the bottom of this pixel
* boundary, or we hit bottom.
*/
r = q + ls;
for( z = 1; z < yt; z++ ) {
memcpy( r, q, rs );
r += ls;
}
/* Move y on by the number of lines we wrote.
*/
y += yt;
/* Reset yt for next iteration.
*/
yt = zoom->yfac;
}
}
static int
png2vips_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRect *r = &or->valid;
Read *read = (Read *) a;
int y;
#ifdef DEBUG
printf( "png2vips_generate: line %d, %d rows\n", r->top, r->height );
printf( "png2vips_generate: y_top = %d\n", read->y_pos );
#endif /*DEBUG*/
/* We're inside a tilecache where tiles are the full image width, so
* this should always be true.
*/
g_assert( r->left == 0 );
g_assert( r->width == or->im->Xsize );
g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
/* Tiles should always be a strip in height, unless it's the final
* strip.
*/
g_assert( r->height == VIPS_MIN( 8, or->im->Ysize - r->top ) );
/* And check that y_pos is correct. It should be, since we are inside
* a vips_sequential().
*/
if( r->top != read->y_pos ) {
vips_error( "vipspng",
_( "out of order read at line %d" ), read->y_pos );
return( -1 );
}
for( y = 0; y < r->height; y++ ) {
png_bytep q = (png_bytep) VIPS_REGION_ADDR( or, 0, r->top + y );
/* We need to catch and ignore errors from read_row().
*/
if( !setjmp( png_jmpbuf( read->pPng ) ) )
png_read_row( read->pPng, q, NULL );
else {
#ifdef DEBUG
printf( "png2vips_generate: png_read_row() failed, "
"line %d\n", r->top + y );
printf( "png2vips_generate: file %s\n", read->name );
printf( "png2vips_generate: thread %p\n",
g_thread_self() );
#endif /*DEBUG*/
}
read->y_pos += 1;
}
/* Turn errors back on. png_read_end() can trigger them too.
*/
if( setjmp( png_jmpbuf( read->pPng ) ) )
return( -1 );
/* We need to shut down the reader immediately at the end of read or
* we won't detach ready for the next image.
*/
if( read->y_pos >= read->out->Ysize ) {
png_read_end( read->pPng, NULL );
read_destroy( read );
}
return( 0 );
}
/* Entropy-style smartcrop. Repeatedly discard low interest areas. This should
* be faster for very large images.
*/
static int
vips_smartcrop_entropy( VipsSmartcrop *smartcrop,
VipsImage *in, int *left, int *top )
{
int max_slice_size;
int width;
int height;
*left = 0;
*top = 0;
width = in->Xsize;
height = in->Ysize;
/* How much do we trim by each iteration? Aim for 8 steps in the axis
* that needs trimming most.
*/
max_slice_size = VIPS_MAX(
ceil( (width - smartcrop->width) / 8.0 ),
ceil( (height - smartcrop->height) / 8.0 ) );
/* Repeatedly take a slice off width and height until we
* reach the target.
*/
while( width > smartcrop->width ||
height > smartcrop->height ) {
const int slice_width =
VIPS_MIN( width - smartcrop->width, max_slice_size );
const int slice_height =
VIPS_MIN( height - smartcrop->height, max_slice_size );
if( slice_width > 0 ) {
double left_score;
double right_score;
if( vips_smartcrop_score( smartcrop, in,
*left, *top,
slice_width, height, &left_score ) )
return( -1 );
if( vips_smartcrop_score( smartcrop, in,
*left + width - slice_width, *top,
slice_width, height, &right_score ) )
return( -1 );
width -= slice_width;
if( left_score < right_score )
*left += slice_width;
}
if( slice_height > 0 ) {
double top_score;
double bottom_score;
if( vips_smartcrop_score( smartcrop, in,
*left, *top,
width, slice_height, &top_score ) )
return( -1 );
if( vips_smartcrop_score( smartcrop, in,
*left, *top + height - slice_height,
width, slice_height, &bottom_score ) )
return( -1 );
height -= slice_height;
if( top_score < bottom_score )
*top += slice_height;
}
}
return( 0 );
}
static int
vips_join_build( VipsObject *object )
{
VipsConversion *conversion = VIPS_CONVERSION( object );
VipsJoin *join = (VipsJoin *) object;
int x, y;
VipsImage *t;
if( VIPS_OBJECT_CLASS( vips_join_parent_class )->build( object ) )
return( -1 );
switch( join->direction ) {
case VIPS_DIRECTION_HORIZONTAL:
x = join->in1->Xsize + join->shim;
switch( join->align ) {
case VIPS_ALIGN_LOW:
y = 0;
break;
case VIPS_ALIGN_CENTRE:
y = join->in1->Ysize / 2 - join->in2->Ysize / 2;
break;
case VIPS_ALIGN_HIGH:
y = join->in1->Ysize - join->in2->Ysize;
break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
break;
case VIPS_DIRECTION_VERTICAL:
y = join->in1->Ysize + join->shim;
switch( join->align ) {
case VIPS_ALIGN_LOW:
x = 0;
break;
case VIPS_ALIGN_CENTRE:
x = join->in1->Xsize / 2 - join->in2->Xsize / 2;
break;
case VIPS_ALIGN_HIGH:
x = join->in1->Xsize - join->in2->Xsize;
break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
if( vips_insert( join->in1, join->in2, &t, x, y,
"expand", TRUE,
"background", join->background,
NULL ) )
return( -1 );
if( !join->expand ) {
VipsImage *t2;
int left, top, width, height;
switch( join->direction ) {
case VIPS_DIRECTION_HORIZONTAL:
left = 0;
top = VIPS_MAX( 0, y ) - y;
width = t->Xsize;
height = VIPS_MIN( join->in1->Ysize, join->in2->Ysize );
break;
case VIPS_DIRECTION_VERTICAL:
left = VIPS_MAX( 0, x ) - x;
top = 0;
width = VIPS_MIN( join->in1->Xsize, join->in2->Xsize );
height = t->Ysize;
break;
default:
g_assert( 0 );
/* Keep -Wall happy.
*/
return( 0 );
}
if( vips_extract_area( t, &t2,
left, top, width, height, NULL ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
t = t2;
}
if( vips_image_write( t, conversion->out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
/* Break a command-line argument into tokens separated by whitespace.
*
* Strings can't be adjacent, so "hello world" (without quotes) is a single
* string. Strings are written (with \" escaped) into @string. If the string
* is larger than @size, it is silently null-termionated and truncated.
*
* Return NULL for end of tokens.
*/
const char *
vips__token_get( const char *p, VipsToken *token, char *string, int size )
{
const char *q;
int ch;
int n;
int i;
/* Parse this token with p.
*/
if( !p )
return( NULL );
/* Skip initial whitespace.
*/
p += strspn( p, " \t\n\r" );
if( !p[0] )
return( NULL );
switch( (ch = p[0]) ) {
case '{':
case '[':
case '(':
case '<':
*token = VIPS_TOKEN_LEFT;
p += 1;
break;
case ')':
case ']':
case '}':
case '>':
*token = VIPS_TOKEN_RIGHT;
p += 1;
break;
case '=':
*token = VIPS_TOKEN_EQUALS;
p += 1;
break;
case ',':
*token = VIPS_TOKEN_COMMA;
p += 1;
break;
case '"':
case '\'':
/* Parse a quoted string. Copy up to ", interpret any \",
* error if no closing ".
*/
*token = VIPS_TOKEN_STRING;
do {
/* Number of characters until the next quote
* character or end of string.
*/
if( (q = strchr( p + 1, ch )) )
n = q - p + 1;
else
n = strlen( p + 1 );
/* How much can we copy to the buffer?
*/
i = VIPS_MIN( n, size );
vips_strncpy( string, p + 1, i );
/* We might have stopped at an escaped quote. If the
* string was not truncated, swap the preceding
* backslash for a quote.
*/
if( p[n + 1] == ch && p[n] == '\\' && i == n )
string[i - 1] = ch;
string += i;
size -= i;
p += n + 1;
} while( p[0] && p[-1] == '\\' );
p += 1;
break;
default:
/* It's an unquoted string: read up to the next non-string
* character. We don't allow two strings next to each other,
* so the next break must be bracket, equals, comma.
*/
*token = VIPS_TOKEN_STRING;
n = strcspn( p, "<[{()}]>=," );
i = VIPS_MIN( n, size );
vips_strncpy( string, p, i + 1 );
p += n;
/* We remove leading whitespace, so we trim trailing
* whitespace from unquoted strings too. Only if the string
* hasn't been truncated.
*/
if( i == n )
while( i > 0 && isspace( string[i - 1] ) ) {
string[i - 1] = '\0';
i--;
}
break;
}
return( p );
}
static int
png2vips_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
VipsRect *r = &or->valid;
Read *read = (Read *) a;
int y;
#ifdef DEBUG
printf( "png2vips_generate: line %d, %d rows\n", r->top, r->height );
printf( "png2vips_generate: y_top = %d\n", read->y_pos );
#endif /*DEBUG*/
/* We're inside a tilecache where tiles are the full image width, so
* this should always be true.
*/
g_assert( r->left == 0 );
g_assert( r->width == or->im->Xsize );
g_assert( VIPS_RECT_BOTTOM( r ) <= or->im->Ysize );
/* Tiles should always be a strip in height, unless it's the final
* strip.
*/
g_assert( r->height == VIPS_MIN( 8, or->im->Ysize - r->top ) );
/* And check that y_pos is correct. It should be, since we are inside
* a vips_sequential().
*/
if( r->top != read->y_pos ) {
vips_error( "vipspng",
_( "out of order read at line %d" ), read->y_pos );
return( -1 );
}
for( y = 0; y < r->height; y++ ) {
png_bytep q = (png_bytep) VIPS_REGION_ADDR( or, 0, r->top + y );
/* We need to catch errors from read_row().
*/
if( !setjmp( png_jmpbuf( read->pPng ) ) )
png_read_row( read->pPng, q, NULL );
else {
/* We've failed to read some pixels. Knock this
* operation out of cache.
*/
vips_foreign_load_invalidate( read->out );
#ifdef DEBUG
printf( "png2vips_generate: png_read_row() failed, "
"line %d\n", r->top + y );
printf( "png2vips_generate: file %s\n", read->name );
printf( "png2vips_generate: thread %p\n",
g_thread_self() );
#endif /*DEBUG*/
/* And bail if fail is on. We have to add an error
* message, since the handler we install just does
* g_warning().
*/
if( read->fail ) {
vips_error( "vipspng",
"%s", _( "libpng read error" ) );
return( -1 );
}
}
read->y_pos += 1;
}
/* Catch errors from png_read_end(). This can fail on a truncated
* file.
*/
if( setjmp( png_jmpbuf( read->pPng ) ) ) {
if( read->fail ) {
vips_error( "vipspng", "%s", _( "libpng read error" ) );
return( -1 );
}
return( 0 );
}
/* We need to shut down the reader immediately at the end of read or
* we won't detach ready for the next image.
*/
if( read->y_pos >= read->out->Ysize ) {
png_read_end( read->pPng, NULL );
read_destroy( read );
}
return( 0 );
}