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32310f5e4b
… the public API. This was initially proposed by Niels De Graef in !101, and though I still think this is much less practical for day-to-day development, it is actually much nicer for the public part of the API. So let's use these only in public libgimp* API only, not in core. I actually already started to use these for some of the libgimpwidgets classes and am now moving libgimp main classes to these macros. * It doesn't expose the priv member (which is completely useless for plug-in developers, only to be used for core development). * It forces us to never have any variable members in the public API (which we were doing fine so far in newest API, but it's nice to be enforced with these macros). * When using G_DECLARE_FINAL_TYPE in particular, it adds flexibility as we can change the structure size and the members order as these are not exposed. And if some day, we make the class derivable with some signals to handle, only then will we expose the class with some _gimp_reserved* padding (instead of from the start when none is needed). Therefore we will allow for further extension far in the future. Moreover most of these libgimp classes were so far not using any private values, so we were declaring a `priv` member with a bogus contents just "in case we needed it in future" (as we couldn't change the struct size). So even the easiness of having a priv member was very relative for this public API so far (unlike in core code where we actually have much more complex interactions and using priv data all the time).
75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
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*
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* gimpimage.h
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <https://www.gnu.org/licenses/>.
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*/
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#if !defined (__GIMP_H_INSIDE__) && !defined (GIMP_COMPILATION)
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#error "Only <libgimp/gimp.h> can be included directly."
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#endif
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#ifndef __GIMP_IMAGE_H__
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#define __GIMP_IMAGE_H__
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G_BEGIN_DECLS
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/* For information look into the C source or the html documentation */
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#define GIMP_TYPE_IMAGE (gimp_image_get_type ())
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G_DECLARE_FINAL_TYPE (GimpImage, gimp_image, GIMP, IMAGE, GObject)
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gint32 gimp_image_get_id (GimpImage *image);
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GimpImage * gimp_image_get_by_id (gint32 image_id);
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gboolean gimp_image_is_valid (GimpImage *image);
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GList * gimp_list_images (void);
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GList * gimp_image_list_layers (GimpImage *image);
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GList * gimp_image_list_channels (GimpImage *image);
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GList * gimp_image_list_vectors (GimpImage *image);
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GList * gimp_image_list_selected_layers (GimpImage *image);
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gboolean gimp_image_take_selected_layers (GimpImage *image,
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GList *layers);
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guchar * gimp_image_get_colormap (GimpImage *image,
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gint *num_colors);
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gboolean gimp_image_set_colormap (GimpImage *image,
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const guchar *colormap,
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gint num_colors);
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guchar * gimp_image_get_thumbnail_data (GimpImage *image,
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gint *width,
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gint *height,
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gint *bpp);
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GdkPixbuf * gimp_image_get_thumbnail (GimpImage *image,
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gint width,
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gint height,
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GimpPixbufTransparency alpha);
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GimpMetadata * gimp_image_get_metadata (GimpImage *image);
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gboolean gimp_image_set_metadata (GimpImage *image,
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GimpMetadata *metadata);
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G_END_DECLS
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#endif /* __GIMP_IMAGE_H__ */
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