136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* Base type for supported image formats. Subclass this to add a new
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* format.
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef VIPS_FORMAT_H
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#define VIPS_FORMAT_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#define VIPS_TYPE_FORMAT (vips_format_get_type())
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#define VIPS_FORMAT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), \
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VIPS_TYPE_FORMAT, VipsFormat))
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#define VIPS_FORMAT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), \
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VIPS_TYPE_FORMAT, VipsFormatClass))
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#define VIPS_IS_FORMAT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj), VIPS_TYPE_FORMAT))
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#define VIPS_IS_FORMAT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass), VIPS_TYPE_FORMAT))
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#define VIPS_FORMAT_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj), \
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VIPS_TYPE_FORMAT, VipsFormatClass))
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/* Image file properties.
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*/
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typedef enum {
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VIPS_FORMAT_NONE = 0, /* No flags set */
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VIPS_FORMAT_PARTIAL = 1, /* Lazy read OK (eg. tiled tiff) */
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VIPS_FORMAT_BIGENDIAN = 2 /* Most-significant byte first */
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} VipsFormatFlags;
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/* Don't instantiate these things, just use the class stuff.
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*/
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typedef struct _VipsFormat {
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VipsObject parent_object;
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/*< public >*/
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} VipsFormat;
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typedef struct _VipsFormatClass {
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VipsObjectClass parent_class;
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/*< public >*/
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/* Is a file in this format.
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*/
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gboolean (*is_a)(const char *);
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/* Read just the header into the VipsImage.
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*/
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int (*header)(const char *, VipsImage *);
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/* Load the whole image.
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*/
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int (*load)(const char *, VipsImage *);
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/* Write the VipsImage to the file in this format.
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*/
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int (*save)(VipsImage *, const char *);
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/* Get the flags for this file in this format.
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*/
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VipsFormatFlags (*get_flags)(const char *);
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/* Loop over formats in this order, default 0. We need this because
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* some formats can be read by several loaders (eg. tiff can be read
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* by the libMagick loader as well as by the tiff loader), and we want
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* to make sure the better loader comes first.
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*/
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int priority;
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/* Null-terminated list of allowed suffixes, eg. ".tif", ".tiff".
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*/
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const char **suffs;
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} VipsFormatClass;
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VIPS_API
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GType vips_format_get_type(void);
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/* Map over and find formats. This uses type introspection to loop over
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* subclasses of VipsFormat.
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*/
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VIPS_API
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void *vips_format_map(VipsSListMap2Fn fn, void *a, void *b);
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VIPS_API
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VipsFormatClass *vips_format_for_file(const char *filename);
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VIPS_API
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VipsFormatClass *vips_format_for_name(const char *filename);
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VIPS_API
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VipsFormatFlags vips_format_get_flags(VipsFormatClass *format,
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const char *filename);
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/* Read/write an image convenience functions.
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*/
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VIPS_API
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int vips_format_read(const char *filename, VipsImage *out);
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VIPS_API
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int vips_format_write(VipsImage *in, const char *filename);
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*VIPS_FORMAT_H*/
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