mirror of https://github.com/GNOME/gimp.git
330 lines
8.4 KiB
C
330 lines
8.4 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.c
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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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#include "config.h"
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#include "gimp.h"
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#include "gimppixbuf.h"
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enum
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{
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PROP_0,
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PROP_ID,
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N_PROPS
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};
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struct _GimpImagePrivate
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{
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gint id;
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};
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static void gimp_image_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_image_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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G_DEFINE_TYPE_WITH_PRIVATE (GimpImage, gimp_image, G_TYPE_OBJECT)
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#define parent_class gimp_image_parent_class
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static GParamSpec *props[N_PROPS] = { NULL, };
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static void
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gimp_image_class_init (GimpImageClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->set_property = gimp_image_set_property;
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object_class->get_property = gimp_image_get_property;
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props[PROP_ID] =
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g_param_spec_int ("id",
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"The image id",
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"The image id for internal use",
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0, G_MAXINT32, 0,
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GIMP_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_properties (object_class, N_PROPS, props);
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}
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static void
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gimp_image_init (GimpImage *image)
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{
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image->priv = gimp_image_get_instance_private (image);
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}
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static void
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gimp_image_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpImage *image = GIMP_IMAGE (object);
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switch (property_id)
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{
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case PROP_ID:
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image->priv->id = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_image_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpImage *image = GIMP_IMAGE (object);
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switch (property_id)
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{
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case PROP_ID:
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g_value_set_int (value, image->priv->id);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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/* Public API. */
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/**
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* gimp_image_get_id:
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* @image: The image.
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*
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* Returns: the image ID.
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*
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* Since: 3.0
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**/
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gint32
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gimp_image_get_id (GimpImage *image)
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{
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return image->priv->id;
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}
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/**
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* gimp_image_get_colormap:
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* @image_ID: The image.
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* @num_colors: Returns the number of colors in the colormap array.
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*
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* Returns the image's colormap
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*
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* This procedure returns an actual pointer to the image's colormap, as
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* well as the number of colors contained in the colormap. If the image
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* is not of base type INDEXED, this pointer will be NULL.
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*
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* Returns: The image's colormap.
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*/
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guchar *
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gimp_image_get_colormap (gint32 image_ID,
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gint *num_colors)
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{
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gint num_bytes;
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guchar *cmap;
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cmap = _gimp_image_get_colormap (image_ID, &num_bytes);
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if (num_colors)
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*num_colors = num_bytes / 3;
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return cmap;
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}
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/**
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* gimp_image_set_colormap:
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* @image_ID: The image.
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* @colormap: The new colormap values.
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* @num_colors: Number of colors in the colormap array.
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*
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* Sets the entries in the image's colormap.
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*
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* This procedure sets the entries in the specified image's colormap.
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* The number of colors is specified by the \"num_colors\" parameter
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* and corresponds to the number of INT8 triples that must be contained
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* in the \"cmap\" array.
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*
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* Returns: TRUE on success.
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*/
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gboolean
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gimp_image_set_colormap (gint32 image_ID,
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const guchar *colormap,
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gint num_colors)
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{
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return _gimp_image_set_colormap (image_ID, num_colors * 3, colormap);
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}
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/**
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* gimp_image_get_thumbnail_data:
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* @image_ID: The image.
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* @width: (inout): The requested thumbnail width.
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* @height: (inout): The requested thumbnail height.
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* @bpp: (out): The previews bpp.
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*
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* Get a thumbnail of an image.
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*
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* This function gets data from which a thumbnail of an image preview
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* can be created. Maximum x or y dimension is 1024 pixels. The pixels
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* are returned in RGB[A] or GRAY[A] format. The bpp return value
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* gives the number of bytes per pixel in the image.
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*
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* Returns: (transfer full): the thumbnail data.
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**/
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guchar *
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gimp_image_get_thumbnail_data (gint32 image_ID,
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gint *width,
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gint *height,
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gint *bpp)
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{
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gint ret_width;
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gint ret_height;
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guchar *image_data;
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gint data_size;
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_gimp_image_thumbnail (image_ID,
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*width,
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*height,
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&ret_width,
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&ret_height,
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bpp,
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&data_size,
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&image_data);
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*width = ret_width;
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*height = ret_height;
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return image_data;
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}
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/**
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* gimp_image_get_thumbnail:
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* @image_ID: the image ID
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* @width: the requested thumbnail width (<= 1024 pixels)
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* @height: the requested thumbnail height (<= 1024 pixels)
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* @alpha: how to handle an alpha channel
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*
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* Retrieves a thumbnail pixbuf for the image identified by @image_ID.
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* The thumbnail will be not larger than the requested size.
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*
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* Returns: (transfer full): a new #GdkPixbuf
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*
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* Since: 2.2
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**/
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GdkPixbuf *
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gimp_image_get_thumbnail (gint32 image_ID,
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gint width,
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gint height,
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GimpPixbufTransparency alpha)
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{
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gint thumb_width = width;
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gint thumb_height = height;
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gint thumb_bpp;
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guchar *data;
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g_return_val_if_fail (width > 0 && width <= 1024, NULL);
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g_return_val_if_fail (height > 0 && height <= 1024, NULL);
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data = gimp_image_get_thumbnail_data (image_ID,
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&thumb_width,
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&thumb_height,
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&thumb_bpp);
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if (data)
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return _gimp_pixbuf_from_data (data,
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thumb_width, thumb_height, thumb_bpp,
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alpha);
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else
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return NULL;
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}
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/**
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* gimp_image_get_metadata:
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* @image_ID: The image.
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*
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* Returns the image's metadata.
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*
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* Returns exif/iptc/xmp metadata from the image.
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*
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* Returns: (nullable) (transfer full): The exif/ptc/xmp metadata,
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* or %NULL if there is none.
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*
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* Since: 2.10
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**/
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GimpMetadata *
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gimp_image_get_metadata (gint32 image_ID)
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{
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GimpMetadata *metadata = NULL;
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gchar *metadata_string;
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metadata_string = _gimp_image_get_metadata (image_ID);
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if (metadata_string)
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{
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metadata = gimp_metadata_deserialize (metadata_string);
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g_free (metadata_string);
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}
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return metadata;
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}
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/**
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* gimp_image_set_metadata:
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* @image_ID: The image.
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* @metadata: The exif/ptc/xmp metadata.
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*
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* Set the image's metadata.
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*
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* Sets exif/iptc/xmp metadata on the image, or deletes it if
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* @metadata is %NULL.
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*
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* Returns: TRUE on success.
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*
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* Since: 2.10
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**/
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gboolean
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gimp_image_set_metadata (gint32 image_ID,
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GimpMetadata *metadata)
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{
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gchar *metadata_string = NULL;
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gboolean success;
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if (metadata)
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metadata_string = gimp_metadata_serialize (metadata);
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success = _gimp_image_set_metadata (image_ID, metadata_string);
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if (metadata_string)
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g_free (metadata_string);
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return success;
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}
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