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gimp/app/core/gimpgradient-save.c
Michael Natterer 80f3e5ac6b Extended the GIMP Gradient file format to contain the endpoint color types 
2006-09-01  Michael Natterer  <mitch@gimp.org>

	Extended the GIMP Gradient file format to contain the endpoint
	color types for each segment (this is backward compatible because
	old parsers just ignore excess fields at the end of segment
	lines). Fixes bug #128367.

	* app/core/gimpgradient-load.c: optionally load two more fields
	per segment line which contain the color types.

	* app/core/gimpgradient-save.c: save the color types at the end of
	the segment lines.
2006-08-31 23:57:47 +00:00

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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 <string.h>
#include <errno.h>
#include <glib-object.h>
#include <glib/gstdio.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 = g_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_color_type
* left middle right r0 g0 b0 a0 r1 g1 b1 a1 type coloring right_color_type
* ...
*/
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 %d %d\n",
buf[0], buf[1], buf[2], /* left, middle, right */
buf[3], buf[4], buf[5], buf[6], /* left color */
buf[7], buf[8], buf[9], buf[10], /* right color */
(gint) seg->type,
(gint) seg->color,
(gint) seg->left_color_type,
(gint) seg->right_color_type);
}
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 = g_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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