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gimp/app/core/gimpgradient-save.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <glib-object.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "gimpgradient.h"
#include "gimpgradient-save.h"
#include "gimp-intl.h"
gboolean
gimp_gradient_save (GimpData *data,
GError **error)
{
GimpGradient *gradient = GIMP_GRADIENT (data);
GimpGradientSegment *seg;
gint num_segments;
FILE *file;
file = fopen (data->filename, "wb");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (data->filename),
g_strerror (errno));
return FALSE;
}
/* File format is:
*
* GIMP Gradient
* Name: name
* number_of_segments
* left middle right r0 g0 b0 a0 r1 g1 b1 a1 type coloring
* left middle right r0 g0 b0 a0 r1 g1 b1 a1 type coloring
* ...
*/
fprintf (file, "GIMP Gradient\n");
fprintf (file, "Name: %s\n", GIMP_OBJECT (gradient)->name);
/* Count number of segments */
num_segments = 0;
seg = gradient->segments;
while (seg)
{
num_segments++;
seg = seg->next;
}
/* Write rest of file */
fprintf (file, "%d\n", num_segments);
for (seg = gradient->segments; seg; seg = seg->next)
{
gchar buf[11][G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_formatd (buf[0], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->left);
g_ascii_formatd (buf[1], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->middle);
g_ascii_formatd (buf[2], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->right);
g_ascii_formatd (buf[3], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->left_color.r);
g_ascii_formatd (buf[4], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->left_color.g);
g_ascii_formatd (buf[5], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->left_color.b);
g_ascii_formatd (buf[6], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->left_color.a);
g_ascii_formatd (buf[7], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->right_color.r);
g_ascii_formatd (buf[8], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->right_color.g);
g_ascii_formatd (buf[9], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->right_color.b);
g_ascii_formatd (buf[10], G_ASCII_DTOSTR_BUF_SIZE,
"%f", seg->right_color.a);
fprintf (file, "%s %s %s %s %s %s %s %s %s %s %s %d %d\n",
buf[0], buf[1], buf[2], buf[3], buf[4],
buf[5], buf[6], buf[7], buf[8], buf[9], buf[10],
(gint) seg->type,
(gint) seg->color);
}
fclose (file);
return TRUE;
}
gboolean
gimp_gradient_save_as_pov (GimpGradient *gradient,
const gchar *filename,
GError **error)
{
FILE *file;
GimpGradientSegment *seg;
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
gchar color_buf[4][G_ASCII_DTOSTR_BUF_SIZE];
g_return_val_if_fail (GIMP_IS_GRADIENT (gradient), FALSE);
g_return_val_if_fail (filename != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
file = fopen (filename, "wb");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return FALSE;
}
else
{
fprintf (file, "/* color_map file created by the GIMP */\n");
fprintf (file, "/* http://www.gimp.org/ */\n");
fprintf (file, "color_map {\n");
for (seg = gradient->segments; seg; seg = seg->next)
{
/* Left */
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->left);
g_ascii_formatd (color_buf[0], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->left_color.r);
g_ascii_formatd (color_buf[1], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->left_color.g);
g_ascii_formatd (color_buf[2], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->left_color.b);
g_ascii_formatd (color_buf[3], G_ASCII_DTOSTR_BUF_SIZE, "%f",
1.0 - seg->left_color.a);
fprintf (file, "\t[%s color rgbt <%s, %s, %s, %s>]\n",
buf,
color_buf[0], color_buf[1], color_buf[2], color_buf[3]);
/* Middle */
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->middle);
g_ascii_formatd (color_buf[0], G_ASCII_DTOSTR_BUF_SIZE, "%f",
(seg->left_color.r + seg->right_color.r) / 2.0);
g_ascii_formatd (color_buf[1], G_ASCII_DTOSTR_BUF_SIZE, "%f",
(seg->left_color.g + seg->right_color.g) / 2.0);
g_ascii_formatd (color_buf[2], G_ASCII_DTOSTR_BUF_SIZE, "%f",
(seg->left_color.b + seg->right_color.b) / 2.0);
g_ascii_formatd (color_buf[3], G_ASCII_DTOSTR_BUF_SIZE, "%f",
1.0 - (seg->left_color.a + seg->right_color.a) / 2.0);
fprintf (file, "\t[%s color rgbt <%s, %s, %s, %s>]\n",
buf,
color_buf[0], color_buf[1], color_buf[2], color_buf[3]);
/* Right */
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->right);
g_ascii_formatd (color_buf[0], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->right_color.r);
g_ascii_formatd (color_buf[1], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->right_color.g);
g_ascii_formatd (color_buf[2], G_ASCII_DTOSTR_BUF_SIZE, "%f",
seg->right_color.b);
g_ascii_formatd (color_buf[3], G_ASCII_DTOSTR_BUF_SIZE, "%f",
1.0 - seg->right_color.a);
fprintf (file, "\t[%s color rgbt <%s, %s, %s, %s>]\n",
buf,
color_buf[0], color_buf[1], color_buf[2], color_buf[3]);
}
fprintf (file, "} /* color_map */\n");
fclose (file);
}
return TRUE;
}
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