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gimp/app/core/gimpgradient-save.c

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/* GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.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,
GOutputStream *output,
GError **error)
{
GimpGradient *gradient = GIMP_GRADIENT (data);
GString *string;
GimpGradientSegment *seg;
gint num_segments;
/* 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
* ...
*/
string = g_string_new ("GIMP Gradient\n");
g_string_append_printf (string, "Name: %s\n",
gimp_object_get_name (gradient));
/* Count number of segments */
num_segments = 0;
seg = gradient->segments;
while (seg)
{
num_segments++;
seg = seg->next;
}
/* Write rest of file */
g_string_append_printf (string, "%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);
g_string_append_printf (string,
"%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);
}
if (! g_output_stream_write_all (output, string->str, string->len,
NULL, NULL, error))
{
g_string_free (string, TRUE);
return FALSE;
}
g_string_free (string, TRUE);
return TRUE;
}
gboolean
gimp_gradient_save_pov (GimpGradient *gradient,
GFile *file,
GError **error)
{
GOutputStream *output;
GString *string;
GimpGradientSegment *seg;
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
gchar color_buf[4][G_ASCII_DTOSTR_BUF_SIZE];
GError *my_error = NULL;
g_return_val_if_fail (GIMP_IS_GRADIENT (gradient), FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (! output)
return FALSE;
string = g_string_new ("/* color_map file created by GIMP */\n"
"/* http://www.gimp.org/ */\n"
"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);
g_string_append_printf (string,
"\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);
g_string_append_printf (string,
"\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);
g_string_append_printf (string,
"\t[%s color rgbt <%s, %s, %s, %s>]\n",
buf,
color_buf[0], color_buf[1],
color_buf[2], color_buf[3]);
}
g_string_append_printf (string, "} /* color_map */\n");
if (! g_output_stream_write_all (output, string->str, string->len,
NULL, NULL, &my_error))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_WRITE,
_("Writing POV file '%s' failed: %s"),
gimp_file_get_utf8_name (file),
my_error->message);
g_clear_error (&my_error);
g_string_free (string, TRUE);
g_object_unref (output);
return FALSE;
}
g_string_free (string, TRUE);
g_object_unref (output);
return TRUE;
}
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