sergiotarxz
/
libvips
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
libvips/tools/vipsthumbnail.c

709 lines
18 KiB
C
Raw Blame History

/* VIPS thumbnailer
*
* 11/1/09
*
* 13/1/09
* - decode labq and rad images
* - colour management
* - better handling of tiny images
* 25/1/10
* - added "--delete"
* 6/2/10
* - added "--interpolator"
* - added "--nosharpen"
* - better 'open' logic, test lazy flag now
* 13/5/10
* - oops hehe residual sharpen test was reversed
* - and the mask coefficients were messed up
* 26/5/10
* - delete failed if there was a profile
* 4/7/10
* - oops sharpening was turning off for integer shrinks, thanks Nicolas
* 30/7/10
* - use new "rd" mode rather than our own open via disc
* 8/2/12
* - use :seq mode for png images
* - shrink to a scanline cache to ensure we request pixels sequentially
* from the input
* 13/6/12
* - update the sequential stuff to the general method
* 21/6/12
* - remove "--nodelete" option, have a --delete option instead, off by
* default
* - much more gentle extra sharpening
* 13/11/12
* - allow absolute paths in -o (thanks fuho)
* 3/5/13
* - add optional sharpening mask from file
* 10/7/13
* - rewrite for vips8
* - handle embedded jpeg thumbnails
* 12/11/13
* - add --linear option
* 18/12/13
* - add --crop option
* 5/3/14
* - copy main image metadata to embedded thumbnails, thanks ottob
* 6/3/14
* - add --rotate flag
* 7/3/14
* - remove the embedded thumbnail reader, embedded thumbnails are too
* unlike the main image wrt. rotation / colour / etc.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <locale.h>
#include <vips/vips.h>
#define ORIENTATION ("exif-ifd0-Orientation")
static char *thumbnail_size = "128";
static int thumbnail_width = 128;
static int thumbnail_height = 128;
static char *output_format = "tn_%s.jpg";
static char *interpolator = "bilinear";
static char *export_profile = NULL;
static char *import_profile = NULL;
static char *convolution_mask = "mild";
static gboolean delete_profile = FALSE;
static gboolean linear_processing = FALSE;
static gboolean crop_image = FALSE;
static gboolean rotate_image = FALSE;
/* Deprecated and unused.
*/
static gboolean nosharpen = FALSE;
static gboolean nodelete_profile = FALSE;
static gboolean verbose = FALSE;
static GOptionEntry options[] = {
{ "size", 's', 0,
G_OPTION_ARG_STRING, &thumbnail_size,
N_( "shrink to SIZE or to WIDTHxHEIGHT" ),
N_( "SIZE" ) },
{ "output", 'o', 0,
G_OPTION_ARG_STRING, &output_format,
N_( "set output to FORMAT" ),
N_( "FORMAT" ) },
{ "interpolator", 'p', 0,
G_OPTION_ARG_STRING, &interpolator,
N_( "resample with INTERPOLATOR" ),
N_( "INTERPOLATOR" ) },
{ "sharpen", 'r', 0,
G_OPTION_ARG_STRING, &convolution_mask,
N_( "sharpen with none|mild|MASKFILE" ),
N_( "none|mild|MASKFILE" ) },
{ "eprofile", 'e', 0,
G_OPTION_ARG_STRING, &export_profile,
N_( "export with PROFILE" ),
N_( "PROFILE" ) },
{ "iprofile", 'i', 0,
G_OPTION_ARG_STRING, &import_profile,
N_( "import untagged images with PROFILE" ),
N_( "PROFILE" ) },
{ "linear", 'a', 0,
G_OPTION_ARG_NONE, &linear_processing,
N_( "process in linear space" ), NULL },
{ "crop", 'c', 0,
G_OPTION_ARG_NONE, &crop_image,
N_( "crop exactly to SIZE" ), NULL },
{ "rotate", 't', 0,
G_OPTION_ARG_NONE, &rotate_image,
N_( "auto-rotate" ), NULL },
{ "delete", 'd', 0,
G_OPTION_ARG_NONE, &delete_profile,
N_( "delete profile from exported image" ), NULL },
{ "verbose", 'v', G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_NONE, &verbose,
N_( "(deprecated, does nothing)" ), NULL },
{ "nodelete", 'l', G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_NONE, &nodelete_profile,
N_( "(deprecated, does nothing)" ), NULL },
{ "nosharpen", 'n', G_OPTION_FLAG_HIDDEN,
G_OPTION_ARG_NONE, &nosharpen,
N_( "(deprecated, does nothing)" ), NULL },
{ NULL }
};
static VipsAngle
get_angle( VipsImage *im )
{
VipsAngle angle;
const char *orientation;
angle = VIPS_ANGLE_0;
if( vips_image_get_typeof( im, ORIENTATION ) &&
!vips_image_get_string( im, ORIENTATION, &orientation ) ) {
if( vips_isprefix( "6", orientation ) )
angle = VIPS_ANGLE_90;
else if( vips_isprefix( "8", orientation ) )
angle = VIPS_ANGLE_270;
else if( vips_isprefix( "3", orientation ) )
angle = VIPS_ANGLE_180;
/* Other values do rotate + mirror, don't bother handling them
* though, how common can mirroring be.
*
* See:
*
* http://www.80sidea.com/archives/2316
*/
}
return( angle );
}
/* 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( VipsImage *im, double *residual )
{
VipsAngle angle = get_angle( im );
gboolean rotate = angle == VIPS_ANGLE_90 || angle == VIPS_ANGLE_270;
int width = rotate_image && rotate ? im->Ysize : im->Xsize;
int height = rotate_image && rotate ? im->Xsize : im->Ysize;
VipsDirection direction;
/* 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;
if( crop_image ) {
if( horizontal < vertical )
direction = VIPS_DIRECTION_HORIZONTAL;
else
direction = VIPS_DIRECTION_VERTICAL;
}
else {
if( horizontal < vertical )
direction = VIPS_DIRECTION_VERTICAL;
else
direction = VIPS_DIRECTION_HORIZONTAL;
}
double factor = direction == VIPS_DIRECTION_HORIZONTAL ?
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 &&
direction == VIPS_DIRECTION_HORIZONTAL ) {
/* Size after int shrink.
*/
int iwidth = width / shrink;
/* Therefore residual scale factor is.
*/
double hresidual = (width / factor) / iwidth;
*residual = hresidual;
}
else if( residual &&
direction == VIPS_DIRECTION_VERTICAL ) {
int iheight = height / shrink;
double vresidual = (height / factor) / iheight;
*residual = vresidual;
}
return( shrink );
}
/* Find the best jpeg preload shrink.
*/
static int
thumbnail_find_jpegshrink( VipsImage *im )
{
int shrink = calculate_shrink( im, NULL );
/* We can't use pre-shrunk images in linear mode. libjpeg shrinks in Y
* (of YCbCR), not linear space.
*/
if( linear_processing )
return( 1 );
else if( shrink >= 8 )
return( 8 );
else if( shrink >= 4 )
return( 4 );
else if( shrink >= 2 )
return( 2 );
else
return( 1 );
}
/* Open an image, returning the best version of that image for thumbnailing.
*
* libjpeg supports fast shrink-on-read, so if we have a JPEG, we can ask
* VIPS to load a lower resolution version.
*/
static VipsImage *
thumbnail_open( VipsObject *process, const char *filename )
{
const char *loader;
VipsImage *im;
vips_info( "vipsthumbnail", "thumbnailing %s", filename );
if( linear_processing )
vips_info( "vipsthumbnail", "linear mode" );
if( !(loader = vips_foreign_find_load( filename )) )
return( NULL );
vips_info( "vipsthumbnail", "selected loader is %s", loader );
if( strcmp( loader, "VipsForeignLoadJpegFile" ) == 0 ) {
int jpegshrink;
/* This will just read in the header and is quick.
*/
if( !(im = vips_image_new_from_file( filename, NULL )) )
return( NULL );
jpegshrink = thumbnail_find_jpegshrink( im );
g_object_unref( im );
vips_info( "vipsthumbnail",
"loading jpeg with factor %d pre-shrink",
jpegshrink );
if( !(im = vips_image_new_from_file( filename,
"access", VIPS_ACCESS_SEQUENTIAL,
"shrink", jpegshrink,
NULL )) )
return( NULL );
}
else {
/* All other formats.
*/
if( !(im = vips_image_new_from_file( filename,
"access", VIPS_ACCESS_SEQUENTIAL,
NULL )) )
return( NULL );
}
vips_object_local( process, im );
return( im );
}
static VipsInterpolate *
thumbnail_interpolator( VipsObject *process, VipsImage *in )
{
double residual;
VipsInterpolate *interp;
calculate_shrink( in, &residual );
/* For images smaller than the thumbnail, we upscale with nearest
* neighbor. Otherwise we makes thumbnails that look fuzzy and awful.
*/
if( !(interp = VIPS_INTERPOLATE( vips_object_new_from_string(
g_type_class_ref( VIPS_TYPE_INTERPOLATE ),
residual > 1.0 ? "nearest" : interpolator ) )) )
return( NULL );
vips_object_local( process, interp );
return( interp );
}
/* Some interpolators look a little soft, so we have an optional sharpening
* stage.
*/
static VipsImage *
thumbnail_sharpen( VipsObject *process )
{
VipsImage *mask;
if( strcmp( convolution_mask, "none" ) == 0 )
mask = NULL;
else if( strcmp( convolution_mask, "mild" ) == 0 ) {
mask = vips_image_new_matrixv( 3, 3,
-1.0, -1.0, -1.0,
-1.0, 32.0, -1.0,
-1.0, -1.0, -1.0 );
vips_image_set_double( mask, "scale", 24 );
}
else
if( !(mask =
vips_image_new_from_file( convolution_mask, NULL )) )
vips_error_exit( "unable to load sharpen mask" );
if( mask )
vips_object_local( process, mask );
return( mask );
}
static VipsImage *
thumbnail_shrink( VipsObject *process, VipsImage *in,
VipsInterpolate *interp, VipsImage *sharpen )
{
VipsImage **t = (VipsImage **) vips_object_local_array( process, 10 );
VipsInterpretation interpretation = linear_processing ?
VIPS_INTERPRETATION_XYZ : VIPS_INTERPRETATION_sRGB;
int shrink;
double residual;
int tile_width;
int tile_height;
int nlines;
/* RAD needs special unpacking.
*/
if( in->Coding == VIPS_CODING_RAD ) {
vips_info( "vipsthumbnail", "unpacking Rad to float" );
/* rad is scrgb.
*/
if( vips_rad2float( in, &t[0], NULL ) )
return( NULL );
in = t[0];
}
/* In linear mode, we import right at the start.
*
* This is only going to work for images in device space. If you have
* an image in PCS which also has an attached profile, strange things
* will happen.
*/
if( linear_processing &&
in->Coding == VIPS_CODING_NONE &&
(in->BandFmt == VIPS_FORMAT_UCHAR ||
in->BandFmt == VIPS_FORMAT_USHORT) &&
(vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ||
import_profile) ) {
if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) )
vips_info( "vipsthumbnail",
"importing with embedded profile" );
else
vips_info( "vipsthumbnail",
"importing with profile %s", import_profile );
if( vips_icc_import( in, &t[1],
"input_profile", import_profile,
"embedded", TRUE,
"pcs", VIPS_PCS_XYZ,
NULL ) )
return( NULL );
in = t[1];
}
/* To the processing colourspace. This will unpack LABQ as well.
*/
vips_info( "vipsthumbnail", "converting to processing space %s",
vips_enum_nick( VIPS_TYPE_INTERPRETATION, interpretation ) );
if( vips_colourspace( in, &t[2], interpretation, NULL ) )
return( NULL );
in = t[2];
shrink = calculate_shrink( in, &residual );
vips_info( "vipsthumbnail", "integer shrink by %d", shrink );
if( vips_shrink( in, &t[3], shrink, shrink, NULL ) )
return( NULL );
in = t[3];
/* We want to make sure we read the image sequentially.
* However, the convolution we may be doing later will force us
* into SMALLTILE or maybe FATSTRIP mode and that will break
* sequentiality.
*
* So ... read into a cache where tiles are scanlines, and make sure
* we keep enough scanlines to be able to serve a line of tiles.
*
* We use a threaded tilecache to avoid a deadlock: suppose thread1,
* evaluating the top block of the output, is delayed, and thread2,
* evaluating the second block, gets here first (this can happen on
* a heavily-loaded system).
*
* With an unthreaded tilecache (as we had before), thread2 will get
* the cache lock and start evaling the second block of the shrink.
* When it reaches the png reader it will stall until the first block
* has been used ... but it never will, since thread1 will block on
* this cache lock.
*/
vips_get_tile_size( in,
&tile_width, &tile_height, &nlines );
if( vips_tilecache( in, &t[4],
"tile_width", in->Xsize,
"tile_height", 10,
"max_tiles", (nlines * 2) / 10,
"access", VIPS_ACCESS_SEQUENTIAL,
"threaded", TRUE,
NULL ) ||
vips_affine( t[4], &t[5], residual, 0, 0, residual,
"interpolate", interp,
NULL ) )
return( NULL );
in = t[5];
vips_info( "vipsthumbnail", "residual scale by %g", residual );
vips_info( "vipsthumbnail", "%s interpolation",
VIPS_OBJECT_GET_CLASS( interp )->nickname );
/* Colour management.
*
* In linear mode, just export. In device space mode, do a combined
* import/export to transform to the target space.
*/
if( linear_processing ) {
if( export_profile ||
vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ) {
vips_info( "vipsthumbnail",
"exporting to device space with a profile" );
if( vips_icc_export( in, &t[7],
"output_profile", export_profile,
NULL ) )
return( NULL );
in = t[7];
}
else {
vips_info( "vipsthumbnail", "converting to sRGB" );
if( vips_colourspace( in, &t[6],
VIPS_INTERPRETATION_sRGB, NULL ) )
return( NULL );
in = t[6];
}
}
else if( export_profile &&
(vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ||
import_profile) ) {
if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) )
vips_info( "vipsthumbnail",
"importing with embedded profile" );
else
vips_info( "vipsthumbnail",
"importing with profile %s", import_profile );
vips_info( "vipsthumbnail",
"exporting with profile %s", export_profile );
if( vips_icc_transform( in, &t[6], export_profile,
"input_profile", import_profile,
"embedded", TRUE,
NULL ) )
return( NULL );
in = t[6];
}
/* If we are upsampling, don't sharpen, since nearest looks dumb
* sharpened.
*/
if( shrink >= 1 &&
residual <= 1.0 &&
sharpen ) {
vips_info( "vipsthumbnail", "sharpening thumbnail" );
if( vips_conv( in, &t[8], sharpen, NULL ) )
return( NULL );
in = t[8];
}
if( delete_profile &&
vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ) {
vips_info( "vipsthumbnail",
"deleting profile from output image" );
if( !vips_image_remove( in, VIPS_META_ICC_NAME ) )
return( NULL );
}
return( in );
}
/* Crop down to the final size, if crop_image is set.
*/
static VipsImage *
thumbnail_crop( VipsObject *process, VipsImage *im )
{
VipsImage **t = (VipsImage **) vips_object_local_array( process, 2 );
if( crop_image ) {
int left = (im->Xsize - thumbnail_width) / 2;
int top = (im->Ysize - thumbnail_height) / 2;
if( vips_extract_area( im, &t[0], left, top,
thumbnail_width, thumbnail_height, NULL ) )
return( NULL );
im = t[0];
}
return( im );
}
/* Auto-rotate, if rotate_image is set.
*/
static VipsImage *
thumbnail_rotate( VipsObject *process, VipsImage *im )
{
VipsImage **t = (VipsImage **) vips_object_local_array( process, 1 );
if( rotate_image ) {
if( vips_rot( im, &t[0], get_angle( im ), NULL ) )
return( NULL );
im = t[0];
(void) vips_image_remove( im, ORIENTATION );
}
return( im );
}
/* Given (eg.) "/poop/somefile.png", write @im to the thumbnail name,
* (eg.) "/poop/tn_somefile.jpg".
*/
static int
thumbnail_write( VipsImage *im, const char *filename )
{
char *file;
char *p;
char buf[FILENAME_MAX];
char *output_name;
file = g_path_get_basename( filename );
/* Remove the suffix from the file portion.
*/
if( (p = strrchr( file, '.' )) )
*p = '\0';
/* output_format can be an absolute path, in which case we discard the
* path from the incoming file.
*/
vips_snprintf( buf, FILENAME_MAX, output_format, file );
if( g_path_is_absolute( output_format ) )
output_name = g_strdup( buf );
else {
char *dir;
dir = g_path_get_dirname( filename );
output_name = g_build_filename( dir, buf, NULL );
g_free( dir );
}
vips_info( "vipsthumbnail",
"thumbnailing %s as %s", filename, output_name );
g_free( file );
if( vips_image_write_to_file( im, output_name, NULL ) ) {
g_free( output_name );
return( -1 );
}
g_free( output_name );
return( 0 );
}
static int
thumbnail_process( VipsObject *process, const char *filename )
{
VipsImage *sharpen = thumbnail_sharpen( process );
VipsImage *in;
VipsInterpolate *interp;
VipsImage *thumbnail;
VipsImage *crop;
VipsImage *rotate;
if( !(in = thumbnail_open( process, filename )) ||
!(interp = thumbnail_interpolator( process, in )) ||
!(thumbnail =
thumbnail_shrink( process, in, interp, sharpen )) ||
!(crop = thumbnail_crop( process, thumbnail )) ||
!(rotate = thumbnail_rotate( process, crop )) ||
thumbnail_write( rotate, filename ) )
return( -1 );
return( 0 );
}
int
main( int argc, char **argv )
{
GOptionContext *context;
GError *error = NULL;
int i;
if( vips_init( argv[0] ) )
vips_error_exit( "unable to start VIPS" );
textdomain( GETTEXT_PACKAGE );
setlocale( LC_ALL, "" );
context = g_option_context_new( _( "- thumbnail generator" ) );
g_option_context_add_main_entries( context, options, GETTEXT_PACKAGE );
g_option_context_add_group( context, vips_get_option_group() );
if( !g_option_context_parse( context, &argc, &argv, &error ) ) {
if( error ) {
fprintf( stderr, "%s\n", error->message );
g_error_free( error );
}
vips_error_exit( "try \"%s --help\"", g_get_prgname() );
}
g_option_context_free( context );
if( sscanf( thumbnail_size, "%d x %d",
&thumbnail_width, &thumbnail_height ) != 2 ) {
if( sscanf( thumbnail_size, "%d", &thumbnail_width ) != 1 )
vips_error_exit( "unable to parse size \"%s\" -- "
"use eg. 128 or 200x300", thumbnail_size );
thumbnail_height = thumbnail_width;
}
for( i = 1; i < argc; i++ ) {
/* Hang resources for processing this thumbnail off @process.
*/
VipsObject *process = VIPS_OBJECT( vips_image_new() );
if( thumbnail_process( process, argv[i] ) ) {
fprintf( stderr, "%s: unable to thumbnail %s\n",
argv[0], argv[i] );
fprintf( stderr, "%s", vips_error_buffer() );
vips_error_clear();
}
g_object_unref( process );
}
vips_shutdown();
return( 0 );
}
Reference in New Issue View Git Blame Copy Permalink