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gimp/app/core/gimppalette-load.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 <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <cairo.h>
#include <glib-object.h>
#include <glib/gstdio.h>
#ifdef G_OS_WIN32
#include "libgimpbase/gimpwin32-io.h"
#endif
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "gimppalette.h"
#include "gimppalette-load.h"
#include "gimp-intl.h"
GList *
gimp_palette_load (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
GimpPaletteEntry *entry;
gchar str[1024];
gchar *tok;
FILE *file;
gint r, g, b;
gint linenum;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
r = g = b = 0;
file = g_fopen (filename, "rb");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
linenum = 1;
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
return NULL;
}
if (! g_str_has_prefix (str, "GIMP Palette"))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Missing magic header."),
gimp_filename_to_utf8 (filename));
fclose (file);
return NULL;
}
palette = g_object_new (GIMP_TYPE_PALETTE,
"mime-type", "application/x-gimp-palette",
NULL);
linenum++;
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
if (g_str_has_prefix (str, "Name: "))
{
gchar *utf8;
utf8 = gimp_any_to_utf8 (g_strstrip (str + strlen ("Name: ")), -1,
_("Invalid UTF-8 string in palette file '%s'"),
gimp_filename_to_utf8 (filename));
gimp_object_take_name (GIMP_OBJECT (palette), utf8);
linenum++;
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
if (g_str_has_prefix (str, "Columns: "))
{
gint columns;
columns = atoi (g_strstrip (str + strlen ("Columns: ")));
if (columns < 0 || columns > 256)
{
g_message (_("Reading palette file '%s': "
"Invalid number of columns in line %d. "
"Using default value."),
gimp_filename_to_utf8 (filename), linenum);
columns = 0;
}
gimp_palette_set_columns (palette, columns);
linenum++;
if (! fgets (str, sizeof (str), file))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
}
}
else /* old palette format */
{
gimp_object_take_name (GIMP_OBJECT (palette),
g_filename_display_basename (filename));
}
while (! feof (file))
{
if (str[0] != '#' && str[0] != '\n')
{
tok = strtok (str, " \t");
if (tok)
r = atoi (tok);
else
g_message (_("Reading palette file '%s': "
"Missing RED component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
tok = strtok (NULL, " \t");
if (tok)
g = atoi (tok);
else
g_message (_("Reading palette file '%s': "
"Missing GREEN component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
tok = strtok (NULL, " \t");
if (tok)
b = atoi (tok);
else
g_message (_("Reading palette file '%s': "
"Missing BLUE component in line %d."),
gimp_filename_to_utf8 (filename), linenum);
/* optional name */
tok = strtok (NULL, "\n");
if (r < 0 || r > 255 ||
g < 0 || g > 255 ||
b < 0 || b > 255)
g_message (_("Reading palette file '%s': "
"RGB value out of range in line %d."),
gimp_filename_to_utf8 (filename), linenum);
/* don't call gimp_palette_add_entry here, it's rather inefficient */
entry = g_slice_new0 (GimpPaletteEntry);
gimp_rgba_set_uchar (&entry->color,
(guchar) r,
(guchar) g,
(guchar) b,
255);
entry->name = g_strdup (tok ? tok : _("Untitled"));
entry->position = gimp_palette_get_n_colors (palette);
palette->colors = g_list_prepend (palette->colors, entry);
palette->n_colors++;
}
linenum++;
if (! fgets (str, sizeof (str), file))
{
if (feof (file))
break;
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s': "
"Read error in line %d."),
gimp_filename_to_utf8 (filename), linenum);
fclose (file);
g_object_unref (palette);
return NULL;
}
}
fclose (file);
palette->colors = g_list_reverse (palette->colors);
return g_list_prepend (NULL, palette);
}
GList *
gimp_palette_load_act (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
gchar *palette_name;
gint fd;
guchar color_bytes[4];
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (! fd)
{
g_set_error (error,
G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
palette_name = g_filename_display_basename (filename);
palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
g_free (palette_name);
while (read (fd, color_bytes, 3) == 3)
{
GimpRGB color;
gimp_rgba_set_uchar (&color,
color_bytes[0],
color_bytes[1],
color_bytes[2],
255);
gimp_palette_add_entry (palette, -1, NULL, &color);
}
close (fd);
return g_list_prepend (NULL, palette);
}
GList *
gimp_palette_load_riff (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
gchar *palette_name;
gint fd;
guchar color_bytes[4];
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (! fd)
{
g_set_error (error,
G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
palette_name = g_filename_display_basename (filename);
palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
g_free (palette_name);
lseek (fd, 28, SEEK_SET);
while (read (fd,
color_bytes, sizeof (color_bytes)) == sizeof (color_bytes))
{
GimpRGB color;
gimp_rgba_set_uchar (&color,
color_bytes[0],
color_bytes[1],
color_bytes[2],
255);
gimp_palette_add_entry (palette, -1, NULL, &color);
}
close (fd);
return g_list_prepend (NULL, palette);
}
GList *
gimp_palette_load_psp (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
gchar *palette_name;
gint fd;
guchar color_bytes[4];
gint number_of_colors;
gint data_size;
gint i, j;
gboolean color_ok;
gchar buffer[4096];
/*Maximum valid file size: 256 * 4 * 3 + 256 * 2 ~= 3650 bytes */
gchar **lines;
gchar **ascii_colors;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (! fd)
{
g_set_error (error,
G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
palette_name = g_filename_display_basename (filename);
palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
g_free (palette_name);
lseek (fd, 16, SEEK_SET);
data_size = read (fd, buffer, sizeof (buffer) - 1);
buffer[data_size] = '\0';
lines = g_strsplit (buffer, "\x0d\x0a", -1);
number_of_colors = atoi (lines[0]);
for (i = 0; i < number_of_colors; i++)
{
if (lines[i + 1] == NULL)
{
g_printerr ("Premature end of file reading %s.",
gimp_filename_to_utf8 (filename));
break;
}
ascii_colors = g_strsplit (lines[i + 1], " ", 3);
color_ok = TRUE;
for (j = 0 ; j < 3; j++)
{
if (ascii_colors[j] == NULL)
{
g_printerr ("Corrupted palette file %s.",
gimp_filename_to_utf8 (filename));
color_ok = FALSE;
break;
}
color_bytes[j] = atoi (ascii_colors[j]);
}
if (color_ok)
{
GimpRGB color;
gimp_rgba_set_uchar (&color,
color_bytes[0],
color_bytes[1],
color_bytes[2],
255);
gimp_palette_add_entry (palette, -1, NULL, &color);
}
g_strfreev (ascii_colors);
}
g_strfreev (lines);
close (fd);
return g_list_prepend (NULL, palette);
}
GList *
gimp_palette_load_aco (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
gchar *palette_name;
gint fd;
gint format_version;
gint number_of_colors;
gint i;
gchar header[4];
gchar color_info[10];
gchar format2_preamble[4];
gint status;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (! fd)
{
g_set_error (error,
G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
status = read (fd, header, sizeof (header));
if (status != sizeof (header))
{
g_set_error (error,
GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Could not read header from palette file '%s'"),
gimp_filename_to_utf8 (filename));
close (fd);
return NULL;
}
palette_name = g_filename_display_basename (filename);
palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
g_free (palette_name);
format_version = header[1] + (header[0] << 8);
number_of_colors = header[3] + (header[2] << 8);
for (i = 0; i < number_of_colors; i++)
{
gint color_space;
gint w, x, y, z;
gboolean color_ok = FALSE;
GimpRGB color;
if (read (fd, color_info, sizeof (color_info)) != sizeof (color_info))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s'"),
gimp_filename_to_utf8 (filename));
close (fd);
g_object_unref (palette);
return NULL;
}
color_space = color_info[1] + (color_info[0] << 8);
w = (guchar) color_info[3] + ((guchar) color_info[2] << 8);
x = (guchar) color_info[5] + ((guchar) color_info[4] << 8);
y = (guchar) color_info[7] + ((guchar) color_info[6] << 8);
z = (guchar) color_info[9] + ((guchar) color_info[8] << 8);
if (color_space == 0) /* RGB */
{
gdouble R = ((gdouble) w) / 65536.0;
gdouble G = ((gdouble) x) / 65536.0;
gdouble B = ((gdouble) y) / 65536.0;
gimp_rgba_set (&color, R, G, B, 1.0);
color_ok = TRUE;
}
else if (color_space == 1) /* HSV */
{
GimpHSV hsv;
gdouble H = ((gdouble) w) / 65536.0;
gdouble S = ((gdouble) x) / 65536.0;
gdouble V = ((gdouble) y) / 65536.0;
gimp_hsva_set (&hsv, H, S, V, 1.0);
gimp_hsv_to_rgb (&hsv, &color);
color_ok = TRUE;
}
else if (color_space == 2) /* CMYK */
{
GimpCMYK cmyk;
gdouble C = 1.0 - (((gdouble) w) / 65536.0);
gdouble M = 1.0 - (((gdouble) x) / 65536.0);
gdouble Y = 1.0 - (((gdouble) y) / 65536.0);
gdouble K = 1.0 - (((gdouble) z) / 65536.0);
gimp_cmyka_set (&cmyk, C, M, Y, K, 1.0);
gimp_cmyk_to_rgb (&cmyk, &color);
color_ok = TRUE;
}
else if (color_space == 8) /* Grayscale */
{
gdouble K = 1.0 - (((gdouble) w) / 10000.0);
gimp_rgba_set (&color, K, K, K, 1.0);
color_ok = TRUE;
}
else if (color_space == 9) /* Wide? CMYK */
{
GimpCMYK cmyk;
gdouble C = 1.0 - (((gdouble) w) / 10000.0);
gdouble M = 1.0 - (((gdouble) x) / 10000.0);
gdouble Y = 1.0 - (((gdouble) y) / 10000.0);
gdouble K = 1.0 - (((gdouble) z) / 10000.0);
gimp_cmyka_set (&cmyk, C, M, Y, K, 1.0);
gimp_cmyk_to_rgb (&cmyk, &color);
color_ok = TRUE;
}
else
{
g_printerr ("Unsupported color space (%d) in ACO file %s\n",
color_space, gimp_filename_to_utf8 (filename));
}
if (format_version == 2)
{
gint number_of_chars;
if (read (fd,
format2_preamble,
sizeof (format2_preamble)) != sizeof (format2_preamble))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in palette file '%s'"),
gimp_filename_to_utf8 (filename));
close (fd);
g_object_unref (palette);
return NULL;
}
number_of_chars = format2_preamble[3] + (format2_preamble[2] << 8);
lseek (fd, number_of_chars * 2, SEEK_SET);
}
if (color_ok)
gimp_palette_add_entry (palette, -1, NULL, &color);
}
close(fd);
return g_list_prepend (NULL, palette);
}
GList *
gimp_palette_load_css (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpPalette *palette;
gchar *name;
FILE *file;
GRegex *regex;
GimpRGB color;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
regex = g_regex_new (".*color.*:(?P<param>.*);", G_REGEX_CASELESS, 0, error);
if (! regex)
return NULL;
file = g_fopen (filename, "rb");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
name = g_filename_display_basename (filename);
palette = GIMP_PALETTE (gimp_palette_new (context, name));
g_free (name);
do
{
GMatchInfo *matches;
gchar buf[1024];
if (fgets (buf, sizeof (buf), file) != NULL)
{
if (g_regex_match (regex, buf, 0, &matches))
{
gchar *word = g_match_info_fetch_named (matches, "param");
if (gimp_rgb_parse_css (&color, word, -1))
{
if (! gimp_palette_find_entry (palette, &color, NULL))
{
gimp_palette_add_entry (palette, -1, NULL, &color);
}
}
g_free (word);
}
}
} while (! feof (file));
fclose (file);
g_regex_unref (regex);
return g_list_prepend (NULL, palette);
}
GimpPaletteFileFormat
gimp_palette_load_detect_format (const gchar *filename)
{
GimpPaletteFileFormat format = GIMP_PALETTE_FILE_FORMAT_UNKNOWN;
gint fd;
gchar header[16];
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (fd)
{
if (read (fd, header, sizeof (header)) == sizeof (header))
{
if (g_str_has_prefix (header + 0, "RIFF") &&
g_str_has_prefix (header + 8, "PAL data"))
{
format = GIMP_PALETTE_FILE_FORMAT_RIFF_PAL;
}
else if (g_str_has_prefix (header, "GIMP Palette"))
{
format = GIMP_PALETTE_FILE_FORMAT_GPL;
}
else if (g_str_has_prefix (header, "JASC-PAL"))
{
format = GIMP_PALETTE_FILE_FORMAT_PSP_PAL;
}
}
if (format == GIMP_PALETTE_FILE_FORMAT_UNKNOWN)
{
gchar *lower_filename = g_ascii_strdown (filename, -1);
if (g_str_has_suffix (lower_filename, ".aco"))
{
format = GIMP_PALETTE_FILE_FORMAT_ACO;
}
else if (g_str_has_suffix (lower_filename, ".css"))
{
format = GIMP_PALETTE_FILE_FORMAT_CSS;
}
g_free (lower_filename);
}
if (format == GIMP_PALETTE_FILE_FORMAT_UNKNOWN)
{
struct stat file_stat;
if (fstat (fd, &file_stat) >= 0)
{
if (file_stat.st_size == 768)
format = GIMP_PALETTE_FILE_FORMAT_ACT;
}
}
close (fd);
}
return format;
}
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