diff options
Diffstat (limited to 'app/core/gimppattern-load.c')
| -rw-r--r-- | app/core/gimppattern-load.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/app/core/gimppattern-load.c b/app/core/gimppattern-load.c new file mode 100644 index 0000000..27f057f --- /dev/null +++ b/app/core/gimppattern-load.c @@ -0,0 +1,220 @@ +/* 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 <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <cairo.h> +#include <gegl.h> +#include <gdk-pixbuf/gdk-pixbuf.h> + +#include "libgimpbase/gimpbase.h" +#include "libgimpcolor/gimpcolor.h" + +#include "core-types.h" + +#include "gimppattern.h" +#include "gimppattern-header.h" +#include "gimppattern-load.h" +#include "gimptempbuf.h" + +#include "gimp-intl.h" + + +GList * +gimp_pattern_load (GimpContext *context, + GFile *file, + GInputStream *input, + GError **error) +{ + GimpPattern *pattern = NULL; + const Babl *format = NULL; + GimpPatternHeader header; + gsize size; + gsize bytes_read; + gsize bn_size; + gchar *name = NULL; + + g_return_val_if_fail (G_IS_FILE (file), NULL); + g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + /* read the size */ + if (! g_input_stream_read_all (input, &header, sizeof (header), + &bytes_read, NULL, error) || + bytes_read != sizeof (header)) + { + g_prefix_error (error, _("File appears truncated: ")); + goto error; + } + + /* rearrange the bytes in each unsigned int */ + header.header_size = g_ntohl (header.header_size); + header.version = g_ntohl (header.version); + header.width = g_ntohl (header.width); + header.height = g_ntohl (header.height); + header.bytes = g_ntohl (header.bytes); + header.magic_number = g_ntohl (header.magic_number); + + /* Check for correct file format */ + if (header.magic_number != GIMP_PATTERN_MAGIC || + header.version != 1 || + header.header_size <= sizeof (header)) + { + g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ, + _("Unknown pattern format version %d."), + header.version); + goto error; + } + + /* Check for supported bit depths */ + if (header.bytes < 1 || header.bytes > 4) + { + g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ, + _("Unsupported pattern depth %d.\n" + "GIMP Patterns must be GRAY or RGB."), + header.bytes); + goto error; + } + + /* Validate dimensions */ + if ((header.width == 0) || (header.width > GIMP_PATTERN_MAX_SIZE) || + (header.height == 0) || (header.height > GIMP_PATTERN_MAX_SIZE) || + (G_MAXSIZE / header.width / header.height / header.bytes < 1)) + { + g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ, + _("Invalid header data in '%s': width=%lu (maximum %lu), " + "height=%lu (maximum %lu), bytes=%lu"), + gimp_file_get_utf8_name (file), + (gulong) header.width, (gulong) GIMP_PATTERN_MAX_SIZE, + (gulong) header.height, (gulong) GIMP_PATTERN_MAX_SIZE, + (gulong) header.bytes); + goto error; + } + + /* Read in the pattern name */ + if ((bn_size = (header.header_size - sizeof (header)))) + { + gchar *utf8; + + if (bn_size > GIMP_PATTERN_MAX_NAME) + { + g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ, + _("Invalid header data in '%s': " + "Pattern name is too long: %lu"), + gimp_file_get_utf8_name (file), + (gulong) bn_size); + goto error; + } + + name = g_new0 (gchar, bn_size + 1); + + if (! g_input_stream_read_all (input, name, bn_size, + &bytes_read, NULL, error) || + bytes_read != bn_size) + { + g_prefix_error (error, _("File appears truncated.")); + g_free (name); + goto error; + } + + utf8 = gimp_any_to_utf8 (name, bn_size - 1, + _("Invalid UTF-8 string in pattern file '%s'."), + gimp_file_get_utf8_name (file)); + g_free (name); + name = utf8; + } + + if (! name) + name = g_strdup (_("Unnamed")); + + pattern = g_object_new (GIMP_TYPE_PATTERN, + "name", name, + "mime-type", "image/x-gimp-pat", + NULL); + + g_free (name); + + switch (header.bytes) + { + case 1: format = babl_format ("Y' u8"); break; + case 2: format = babl_format ("Y'A u8"); break; + case 3: format = babl_format ("R'G'B' u8"); break; + case 4: format = babl_format ("R'G'B'A u8"); break; + } + + pattern->mask = gimp_temp_buf_new (header.width, header.height, format); + size = (gsize) header.width * header.height * header.bytes; + + if (! g_input_stream_read_all (input, + gimp_temp_buf_get_data (pattern->mask), size, + &bytes_read, NULL, error) || + bytes_read != size) + { + g_prefix_error (error, _("File appears truncated.")); + goto error; + } + + return g_list_prepend (NULL, pattern); + + error: + + if (pattern) + g_object_unref (pattern); + + g_prefix_error (error, _("Fatal parse error in pattern file: ")); + + return NULL; +} + +GList * +gimp_pattern_load_pixbuf (GimpContext *context, + GFile *file, + GInputStream *input, + GError **error) +{ + GimpPattern *pattern; + GdkPixbuf *pixbuf; + gchar *name; + + g_return_val_if_fail (G_IS_FILE (file), NULL); + g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + pixbuf = gdk_pixbuf_new_from_stream (input, NULL, error); + if (! pixbuf) + return NULL; + + name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Title")); + + if (! name) + name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Comment")); + + if (! name) + name = g_path_get_basename (gimp_file_get_utf8_name (file)); + + pattern = g_object_new (GIMP_TYPE_PATTERN, + "name", name, + "mime-type", NULL, /* FIXME!! */ + NULL); + g_free (name); + + pattern->mask = gimp_temp_buf_new_from_pixbuf (pixbuf, NULL); + + g_object_unref (pixbuf); + + return g_list_prepend (NULL, pattern); +} |