225 lines
7.1 KiB
C
225 lines
7.1 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libpikabase/pikabase.h"
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#include "libpikacolor/pikacolor.h"
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#include "core-types.h"
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#include "pikapattern.h"
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#include "pikapattern-header.h"
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#include "pikapattern-load.h"
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#include "pikatempbuf.h"
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#include "pika-intl.h"
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GList *
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pika_pattern_load (PikaContext *context,
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GFile *file,
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GInputStream *input,
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GError **error)
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{
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PikaPattern *pattern = NULL;
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const Babl *format = NULL;
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PikaPatternHeader header;
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gsize size;
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gsize bytes_read;
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gsize bn_size;
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gchar *name = NULL;
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g_return_val_if_fail (G_IS_FILE (file), NULL);
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g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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/* read the size */
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if (! g_input_stream_read_all (input, &header, sizeof (header),
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&bytes_read, NULL, error) ||
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bytes_read != sizeof (header))
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{
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g_prefix_error (error, _("File appears truncated: "));
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goto error;
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}
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/* rearrange the bytes in each unsigned int */
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header.header_size = g_ntohl (header.header_size);
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header.version = g_ntohl (header.version);
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header.width = g_ntohl (header.width);
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header.height = g_ntohl (header.height);
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header.bytes = g_ntohl (header.bytes);
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header.magic_number = g_ntohl (header.magic_number);
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/* Check for correct file format */
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if (header.magic_number != PIKA_PATTERN_MAGIC ||
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header.version != 1 ||
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header.header_size <= sizeof (header))
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{
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g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
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_("Unknown pattern format version %d."),
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header.version);
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goto error;
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}
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/* Check for supported bit depths */
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if (header.bytes < 1 || header.bytes > 4)
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{
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g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
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_("Unsupported pattern depth %d.\n"
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"PIKA Patterns must be GRAY or RGB."),
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header.bytes);
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goto error;
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}
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/* Validate dimensions */
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if ((header.width == 0) || (header.width > PIKA_PATTERN_MAX_SIZE) ||
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(header.height == 0) || (header.height > PIKA_PATTERN_MAX_SIZE) ||
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(G_MAXSIZE / header.width / header.height / header.bytes < 1))
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{
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g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
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_("Invalid header data in '%s': width=%lu (maximum %lu), "
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"height=%lu (maximum %lu), bytes=%lu"),
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pika_file_get_utf8_name (file),
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(gulong) header.width, (gulong) PIKA_PATTERN_MAX_SIZE,
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(gulong) header.height, (gulong) PIKA_PATTERN_MAX_SIZE,
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(gulong) header.bytes);
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goto error;
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}
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/* Read in the pattern name */
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if ((bn_size = (header.header_size - sizeof (header))))
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{
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gchar *utf8;
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if (bn_size > PIKA_PATTERN_MAX_NAME)
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{
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g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
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_("Invalid header data in '%s': "
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"Pattern name is too long: %lu"),
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pika_file_get_utf8_name (file),
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(gulong) bn_size);
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goto error;
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}
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name = g_new0 (gchar, bn_size + 1);
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if (! g_input_stream_read_all (input, name, bn_size,
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&bytes_read, NULL, error) ||
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bytes_read != bn_size)
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{
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g_prefix_error (error, _("File appears truncated."));
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g_free (name);
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goto error;
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}
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utf8 = pika_any_to_utf8 (name, bn_size - 1,
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_("Invalid UTF-8 string in pattern file '%s'."),
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pika_file_get_utf8_name (file));
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g_free (name);
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name = utf8;
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}
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if (! name)
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name = g_strdup (_("Unnamed"));
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pattern = g_object_new (PIKA_TYPE_PATTERN,
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"name", name,
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"mime-type", "image/x-pika-pat",
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NULL);
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g_free (name);
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switch (header.bytes)
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{
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case 1: format = babl_format ("Y' u8"); break;
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case 2: format = babl_format ("Y'A u8"); break;
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case 3: format = babl_format ("R'G'B' u8"); break;
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case 4: format = babl_format ("R'G'B'A u8"); break;
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}
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pattern->mask = pika_temp_buf_new (header.width, header.height, format);
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size = (gsize) header.width * header.height * header.bytes;
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if (! g_input_stream_read_all (input,
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pika_temp_buf_get_data (pattern->mask), size,
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&bytes_read, NULL, error) ||
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bytes_read != size)
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{
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g_prefix_error (error, _("File appears truncated."));
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goto error;
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}
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return g_list_prepend (NULL, pattern);
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error:
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if (pattern)
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g_object_unref (pattern);
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g_prefix_error (error, _("Fatal parse error in pattern file: "));
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return NULL;
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}
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GList *
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pika_pattern_load_pixbuf (PikaContext *context,
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GFile *file,
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GInputStream *input,
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GError **error)
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{
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PikaPattern *pattern;
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GdkPixbuf *pixbuf;
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gchar *name;
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g_return_val_if_fail (G_IS_FILE (file), NULL);
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g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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pixbuf = gdk_pixbuf_new_from_stream (input, NULL, error);
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if (! pixbuf)
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return NULL;
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name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Title"));
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if (! name)
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name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Comment"));
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if (! name)
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name = g_path_get_basename (pika_file_get_utf8_name (file));
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pattern = g_object_new (PIKA_TYPE_PATTERN,
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"name", name,
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"mime-type", NULL, /* FIXME!! */
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NULL);
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g_free (name);
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pattern->mask = pika_temp_buf_new_from_pixbuf (pixbuf, NULL);
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g_object_unref (pixbuf);
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return g_list_prepend (NULL, pattern);
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}
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