diff options
Diffstat (limited to 'app/xcf/xcf-load.c')
| -rw-r--r-- | app/xcf/xcf-load.c | 3132 |
1 files changed, 3132 insertions, 0 deletions
diff --git a/app/xcf/xcf-load.c b/app/xcf/xcf-load.c new file mode 100644 index 0000000..d76ddf7 --- /dev/null +++ b/app/xcf/xcf-load.c @@ -0,0 +1,3132 @@ +/* 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 <string.h> +#include <zlib.h> + +#include <cairo.h> +#include <gegl.h> +#include <gdk-pixbuf/gdk-pixbuf.h> + +#include "libgimpbase/gimpbase.h" +#include "libgimpcolor/gimpcolor.h" + +#include "core/core-types.h" + +#include "config/gimpcoreconfig.h" + +#include "gegl/gimp-babl.h" +#include "gegl/gimp-gegl-tile-compat.h" + +#include "core/gimp.h" +#include "core/gimpcontainer.h" +#include "core/gimpdrawable-private.h" /* eek */ +#include "core/gimpgrid.h" +#include "core/gimpgrouplayer.h" +#include "core/gimpimage.h" +#include "core/gimpimage-colormap.h" +#include "core/gimpimage-grid.h" +#include "core/gimpimage-guides.h" +#include "core/gimpimage-metadata.h" +#include "core/gimpimage-private.h" +#include "core/gimpimage-sample-points.h" +#include "core/gimpimage-symmetry.h" +#include "core/gimpimage-undo.h" +#include "core/gimpitemstack.h" +#include "core/gimplayer-floating-selection.h" +#include "core/gimplayer-new.h" +#include "core/gimplayermask.h" +#include "core/gimpparasitelist.h" +#include "core/gimpprogress.h" +#include "core/gimpselection.h" +#include "core/gimpsymmetry.h" +#include "core/gimptemplate.h" + +#include "operations/layer-modes/gimp-layer-modes.h" + +#include "text/gimptextlayer.h" +#include "text/gimptextlayer-xcf.h" + +#include "vectors/gimpanchor.h" +#include "vectors/gimpstroke.h" +#include "vectors/gimpbezierstroke.h" +#include "vectors/gimpvectors.h" +#include "vectors/gimpvectors-compat.h" + +#include "xcf-private.h" +#include "xcf-load.h" +#include "xcf-read.h" +#include "xcf-seek.h" +#include "xcf-utils.h" + +#include "gimp-log.h" +#include "gimp-intl.h" + + +#define MAX_XCF_PARASITE_DATA_LEN (256L * 1024 * 1024) + +/* #define GIMP_XCF_PATH_DEBUG */ + + +static void xcf_load_add_masks (GimpImage *image); +static gboolean xcf_load_image_props (XcfInfo *info, + GimpImage *image); +static gboolean xcf_load_layer_props (XcfInfo *info, + GimpImage *image, + GimpLayer **layer, + GList **item_path, + gboolean *apply_mask, + gboolean *edit_mask, + gboolean *show_mask, + guint32 *text_layer_flags, + guint32 *group_layer_flags); +static gboolean xcf_check_layer_props (XcfInfo *info, + GList **item_path, + gboolean *is_group_layer, + gboolean *is_text_layer); +static gboolean xcf_load_channel_props (XcfInfo *info, + GimpImage *image, + GimpChannel **channel); +static gboolean xcf_load_prop (XcfInfo *info, + PropType *prop_type, + guint32 *prop_size); +static GimpLayer * xcf_load_layer (XcfInfo *info, + GimpImage *image, + GList **item_path); +static GimpChannel * xcf_load_channel (XcfInfo *info, + GimpImage *image); +static GimpLayerMask * xcf_load_layer_mask (XcfInfo *info, + GimpImage *image); +static gboolean xcf_load_buffer (XcfInfo *info, + GeglBuffer *buffer); +static gboolean xcf_load_level (XcfInfo *info, + GeglBuffer *buffer); +static gboolean xcf_load_tile (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format); +static gboolean xcf_load_tile_rle (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format, + gint data_length); +static gboolean xcf_load_tile_zlib (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format, + gint data_length); +static GimpParasite * xcf_load_parasite (XcfInfo *info); +static gboolean xcf_load_old_paths (XcfInfo *info, + GimpImage *image); +static gboolean xcf_load_old_path (XcfInfo *info, + GimpImage *image); +static gboolean xcf_load_vectors (XcfInfo *info, + GimpImage *image); +static gboolean xcf_load_vector (XcfInfo *info, + GimpImage *image); + +static gboolean xcf_skip_unknown_prop (XcfInfo *info, + gsize size); + +static gboolean xcf_item_path_is_parent (GList *path, + GList *parent_path); +static void xcf_fix_item_path (GimpLayer *layer, + GList **path, + GList *broken_paths); + +#define xcf_progress_update(info) G_STMT_START \ + { \ + if (info->progress) \ + gimp_progress_pulse (info->progress); \ + } G_STMT_END + + +GimpImage * +xcf_load_image (Gimp *gimp, + XcfInfo *info, + GError **error) +{ + GimpImage *image = NULL; + const GimpParasite *parasite; + gboolean has_metadata = FALSE; + goffset saved_pos; + goffset offset; + gint width; + gint height; + gint image_type; + GimpPrecision precision = GIMP_PRECISION_U8_GAMMA; + gint num_successful_elements = 0; + gint n_broken_layers = 0; + gint n_broken_channels = 0; + GList *broken_paths = NULL; + GList *group_layers = NULL; + GList *syms; + GList *iter; + + /* read in the image width, height and type */ + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + xcf_read_int32 (info, (guint32 *) &image_type, 1); + if (image_type < GIMP_RGB || image_type > GIMP_INDEXED || + width <= 0 || height <= 0) + goto hard_error; + + if (info->file_version >= 4) + { + gint p; + + xcf_read_int32 (info, (guint32 *) &p, 1); + + if (info->file_version == 4) + { + switch (p) + { + case 0: precision = GIMP_PRECISION_U8_GAMMA; break; + case 1: precision = GIMP_PRECISION_U16_GAMMA; break; + case 2: precision = GIMP_PRECISION_U32_LINEAR; break; + case 3: precision = GIMP_PRECISION_HALF_LINEAR; break; + case 4: precision = GIMP_PRECISION_FLOAT_LINEAR; break; + default: + goto hard_error; + } + } + else if (info->file_version == 5 || + info->file_version == 6) + { + switch (p) + { + case 100: precision = GIMP_PRECISION_U8_LINEAR; break; + case 150: precision = GIMP_PRECISION_U8_GAMMA; break; + case 200: precision = GIMP_PRECISION_U16_LINEAR; break; + case 250: precision = GIMP_PRECISION_U16_GAMMA; break; + case 300: precision = GIMP_PRECISION_U32_LINEAR; break; + case 350: precision = GIMP_PRECISION_U32_GAMMA; break; + case 400: precision = GIMP_PRECISION_HALF_LINEAR; break; + case 450: precision = GIMP_PRECISION_HALF_GAMMA; break; + case 500: precision = GIMP_PRECISION_FLOAT_LINEAR; break; + case 550: precision = GIMP_PRECISION_FLOAT_GAMMA; break; + default: + goto hard_error; + } + } + else + { + precision = p; + } + } + + GIMP_LOG (XCF, "version=%d, width=%d, height=%d, image_type=%d, precision=%d", + info->file_version, width, height, image_type, precision); + + if (! gimp_babl_is_valid (image_type, precision)) + { + gimp_message_literal (gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_ERROR, + _("Invalid image mode and precision combination.")); + goto hard_error; + } + + image = gimp_create_image (gimp, width, height, image_type, precision, + FALSE); + + gimp_image_undo_disable (image); + + xcf_progress_update (info); + + /* read the image properties */ + if (! xcf_load_image_props (info, image)) + goto hard_error; + + GIMP_LOG (XCF, "image props loaded"); + + /* check for a GimpGrid parasite */ + parasite = gimp_image_parasite_find (GIMP_IMAGE (image), + gimp_grid_parasite_name ()); + if (parasite) + { + GimpGrid *grid = gimp_grid_from_parasite (parasite); + + if (grid) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + + gimp_image_set_grid (GIMP_IMAGE (image), grid, FALSE); + g_object_unref (grid); + } + } + + /* check for a metadata parasite */ + parasite = gimp_image_parasite_find (GIMP_IMAGE (image), + "gimp-image-metadata"); + if (parasite) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + GimpMetadata *metadata = NULL; + const gchar *meta_string; + + meta_string = (gchar *) gimp_parasite_data (parasite); + + if (meta_string) + metadata = gimp_metadata_deserialize (meta_string); + + if (metadata) + { + has_metadata = TRUE; + + gimp_image_set_metadata (image, metadata, FALSE); + g_object_unref (metadata); + } + + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + } + + /* check for symmetry parasites */ + syms = gimp_image_symmetry_list (); + for (iter = syms; iter; iter = g_list_next (iter)) + { + GType type = (GType) iter->data; + gchar *parasite_name = gimp_symmetry_parasite_name (type); + + parasite = gimp_image_parasite_find (image, + parasite_name); + g_free (parasite_name); + if (parasite) + { + GimpSymmetry *sym = gimp_symmetry_from_parasite (parasite, + image, + type); + + if (sym) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + + gimp_image_symmetry_add (image, sym); + + g_signal_emit_by_name (sym, "active-changed", NULL); + if (sym->active) + gimp_image_set_active_symmetry (image, type); + } + } + } + g_list_free (syms); + + /* migrate the old "exif-data" parasite */ + parasite = gimp_image_parasite_find (GIMP_IMAGE (image), + "exif-data"); + if (parasite) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + + if (has_metadata) + { + g_printerr ("xcf-load: inconsistent metadata discovered: XCF file " + "has both 'gimp-image-metadata' and 'exif-data' " + "parasites, dropping old 'exif-data'\n"); + } + else + { + GimpMetadata *metadata = gimp_image_get_metadata (image); + GError *my_error = NULL; + + if (metadata) + g_object_ref (metadata); + else + metadata = gimp_metadata_new (); + + if (! gimp_metadata_set_from_exif (metadata, + gimp_parasite_data (parasite), + gimp_parasite_data_size (parasite), + &my_error)) + { + gimp_message (gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + _("Corrupt 'exif-data' parasite discovered.\n" + "Exif data could not be migrated: %s"), + my_error->message); + g_clear_error (&my_error); + } + else + { + gimp_image_set_metadata (image, metadata, FALSE); + } + + g_object_unref (metadata); + } + + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + } + + /* migrate the old "gimp-metadata" parasite */ + parasite = gimp_image_parasite_find (GIMP_IMAGE (image), + "gimp-metadata"); + if (parasite) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + const gchar *xmp_data = gimp_parasite_data (parasite); + gint xmp_length = gimp_parasite_data_size (parasite); + + if (has_metadata) + { + g_printerr ("xcf-load: inconsistent metadata discovered: XCF file " + "has both 'gimp-image-metadata' and 'gimp-metadata' " + "parasites, dropping old 'gimp-metadata'\n"); + } + else if (xmp_length < 14 || + strncmp (xmp_data, "GIMP_XMP_1", 10) != 0) + { + gimp_message (gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + _("Corrupt 'gimp-metadata' parasite discovered.\n" + "XMP data could not be migrated.")); + } + else + { + GimpMetadata *metadata = gimp_image_get_metadata (image); + GError *my_error = NULL; + + if (metadata) + g_object_ref (metadata); + else + metadata = gimp_metadata_new (); + + if (! gimp_metadata_set_from_xmp (metadata, + (const guint8 *) xmp_data + 10, + xmp_length - 10, + &my_error)) + { + gimp_message (gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + _("Corrupt 'gimp-metadata' parasite discovered.\n" + "XMP data could not be migrated: %s"), + my_error->message); + g_clear_error (&my_error); + } + else + { + gimp_image_set_metadata (image, metadata, FALSE); + } + + g_object_unref (metadata); + } + + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + } + + /* check for a gimp-xcf-compatibility-mode parasite */ + parasite = gimp_image_parasite_find (GIMP_IMAGE (image), + "gimp-xcf-compatibility-mode"); + if (parasite) + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + + /* just ditch it, it's unused but shouldn't be re-saved */ + gimp_parasite_list_remove (private->parasites, + gimp_parasite_name (parasite)); + } + + xcf_progress_update (info); + + while (TRUE) + { + GimpLayer *layer; + GList *item_path = NULL; + + /* read in the offset of the next layer */ + xcf_read_offset (info, &offset, 1); + + /* if the offset is 0 then we are at the end + * of the layer list. + */ + if (offset == 0) + break; + + /* save the current position as it is where the + * next layer offset is stored. + */ + saved_pos = info->cp; + + /* seek to the layer offset */ + if (! xcf_seek_pos (info, offset, NULL)) + goto error; + + /* read in the layer */ + layer = xcf_load_layer (info, image, &item_path); + if (! layer) + { + n_broken_layers++; + + if (! xcf_seek_pos (info, saved_pos, NULL)) + { + if (item_path) + g_list_free (item_path); + + goto error; + } + + /* Don't just stop at the first broken layer. Load as much as + * possible. + */ + if (! item_path) + { + GimpContainer *layers = gimp_image_get_layers (image); + + item_path = g_list_prepend (NULL, + GUINT_TO_POINTER (gimp_container_get_n_children (layers))); + + broken_paths = g_list_prepend (broken_paths, item_path); + } + + continue; + } + + if (broken_paths && item_path) + { + /* Item paths may be a problem when layers are missing. */ + xcf_fix_item_path (layer, &item_path, broken_paths); + } + + num_successful_elements++; + + xcf_progress_update (info); + + /* suspend layer-group size updates */ + if (GIMP_IS_GROUP_LAYER (layer)) + { + GimpGroupLayer *group = GIMP_GROUP_LAYER (layer); + + group_layers = g_list_prepend (group_layers, group); + + gimp_group_layer_suspend_resize (group, FALSE); + } + + /* add the layer to the image if its not the floating selection */ + if (layer != info->floating_sel) + { + GimpContainer *layers = gimp_image_get_layers (image); + GimpContainer *container; + GimpLayer *parent; + + if (item_path) + { + if (info->floating_sel) + { + /* there is a floating selection, but it will get + * added after all layers are loaded, so toplevel + * layer indices are off-by-one. Adjust item paths + * accordingly: + */ + gint toplevel_index; + + toplevel_index = GPOINTER_TO_UINT (item_path->data); + + toplevel_index--; + + item_path->data = GUINT_TO_POINTER (toplevel_index); + } + + parent = GIMP_LAYER + (gimp_item_stack_get_parent_by_path (GIMP_ITEM_STACK (layers), + item_path, + NULL)); + + container = gimp_viewable_get_children (GIMP_VIEWABLE (parent)); + + g_list_free (item_path); + } + else + { + parent = NULL; + container = layers; + } + + gimp_image_add_layer (image, layer, + parent, + gimp_container_get_n_children (container), + FALSE); + } + + /* restore the saved position so we'll be ready to + * read the next offset. + */ + if (! xcf_seek_pos (info, saved_pos, NULL)) + goto error; + } + + /* resume layer-group size updates, in reverse order */ + for (iter = group_layers; iter; iter = g_list_next (iter)) + { + GimpGroupLayer *group = iter->data; + + gimp_group_layer_resume_resize (group, FALSE); + } + g_clear_pointer (&group_layers, g_list_free); + + if (broken_paths) + { + g_list_free_full (broken_paths, (GDestroyNotify) g_list_free); + broken_paths = NULL; + } + + while (TRUE) + { + GimpChannel *channel; + + /* read in the offset of the next channel */ + xcf_read_offset (info, &offset, 1); + + /* if the offset is 0 then we are at the end + * of the channel list. + */ + if (offset == 0) + break; + + /* save the current position as it is where the + * next channel offset is stored. + */ + saved_pos = info->cp; + + /* seek to the channel offset */ + if (! xcf_seek_pos (info, offset, NULL)) + goto error; + + /* read in the channel */ + channel = xcf_load_channel (info, image); + if (!channel) + { + n_broken_channels++; + + if (! xcf_seek_pos (info, saved_pos, NULL)) + goto error; + + continue; + } + + num_successful_elements++; + + xcf_progress_update (info); + + /* add the channel to the image if its not the selection */ + if (channel != gimp_image_get_mask (image)) + gimp_image_add_channel (image, channel, + NULL, /* FIXME tree */ + gimp_container_get_n_children (gimp_image_get_channels (image)), + FALSE); + + /* restore the saved position so we'll be ready to + * read the next offset. + */ + if (! xcf_seek_pos (info, saved_pos, NULL)) + goto error; + } + + if (n_broken_layers == 0 && n_broken_channels == 0) + xcf_load_add_masks (image); + + if (info->floating_sel && info->floating_sel_drawable) + floating_sel_attach (info->floating_sel, info->floating_sel_drawable); + + if (info->active_layer) + gimp_image_set_active_layer (image, info->active_layer); + + if (info->active_channel) + gimp_image_set_active_channel (image, info->active_channel); + + if (info->file) + gimp_image_set_file (image, info->file); + + if (info->tattoo_state > 0) + gimp_image_set_tattoo_state (image, info->tattoo_state); + + if (n_broken_layers > 0 || n_broken_channels > 0) + goto error; + + gimp_image_undo_enable (image); + + return image; + + error: + if (num_successful_elements == 0) + goto hard_error; + + g_clear_pointer (&group_layers, g_list_free); + + if (broken_paths) + { + g_list_free_full (broken_paths, (GDestroyNotify) g_list_free); + broken_paths = NULL; + } + + gimp_message_literal (gimp, G_OBJECT (info->progress), GIMP_MESSAGE_WARNING, + _("This XCF file is corrupt! I have loaded as much " + "of it as I can, but it is incomplete.")); + + xcf_load_add_masks (image); + + gimp_image_undo_enable (image); + + return image; + + hard_error: + g_clear_pointer (&group_layers, g_list_free); + + if (broken_paths) + { + g_list_free_full (broken_paths, (GDestroyNotify) g_list_free); + broken_paths = NULL; + } + + g_set_error_literal (error, G_FILE_ERROR, G_FILE_ERROR_FAILED, + _("This XCF file is corrupt! I could not even " + "salvage any partial image data from it.")); + + g_clear_object (&image); + + return NULL; +} + +static void +xcf_load_add_masks (GimpImage *image) +{ + GList *layers; + GList *list; + + layers = gimp_image_get_layer_list (image); + + for (list = layers; list; list = g_list_next (list)) + { + GimpLayer *layer = list->data; + GimpLayerMask *mask; + + mask = g_object_get_data (G_OBJECT (layer), "gimp-layer-mask"); + + if (mask) + { + gboolean apply_mask; + gboolean edit_mask; + gboolean show_mask; + + apply_mask = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (layer), + "gimp-layer-mask-apply")); + edit_mask = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (layer), + "gimp-layer-mask-edit")); + show_mask = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (layer), + "gimp-layer-mask-show")); + + gimp_layer_add_mask (layer, mask, FALSE, NULL); + + gimp_layer_set_apply_mask (layer, apply_mask, FALSE); + gimp_layer_set_edit_mask (layer, edit_mask); + gimp_layer_set_show_mask (layer, show_mask, FALSE); + + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask", NULL); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-apply", NULL); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-edit", NULL); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-show", NULL); + } + } + + g_list_free (layers); +} + +static gboolean +xcf_load_image_props (XcfInfo *info, + GimpImage *image) +{ + PropType prop_type; + guint32 prop_size; + + while (TRUE) + { + if (! xcf_load_prop (info, &prop_type, &prop_size)) + return FALSE; + + switch (prop_type) + { + case PROP_END: + return TRUE; + + case PROP_COLORMAP: + { + guint32 n_colors; + guchar cmap[GIMP_IMAGE_COLORMAP_SIZE]; + + xcf_read_int32 (info, &n_colors, 1); + + if (n_colors > (GIMP_IMAGE_COLORMAP_SIZE / 3)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_ERROR, + "Maximum colormap size (%d) exceeded", + GIMP_IMAGE_COLORMAP_SIZE); + return FALSE; + } + + if (info->file_version == 0) + { + gint i; + + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + _("XCF warning: version 0 of XCF file format\n" + "did not save indexed colormaps correctly.\n" + "Substituting grayscale map.")); + + if (! xcf_seek_pos (info, info->cp + n_colors, NULL)) + return FALSE; + + for (i = 0; i < n_colors; i++) + { + cmap[i * 3 + 0] = i; + cmap[i * 3 + 1] = i; + cmap[i * 3 + 2] = i; + } + } + else + { + xcf_read_int8 (info, cmap, n_colors * 3); + } + + /* only set color map if image is indexed, this is just + * sanity checking to make sure gimp doesn't end up with + * an image state that is impossible. + */ + if (gimp_image_get_base_type (image) == GIMP_INDEXED) + gimp_image_set_colormap (image, cmap, n_colors, FALSE); + + GIMP_LOG (XCF, "prop colormap n_colors=%d", n_colors); + } + break; + + case PROP_COMPRESSION: + { + guint8 compression; + + xcf_read_int8 (info, (guint8 *) &compression, 1); + + if ((compression != COMPRESS_NONE) && + (compression != COMPRESS_RLE) && + (compression != COMPRESS_ZLIB) && + (compression != COMPRESS_FRACTAL)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_ERROR, + "Unknown compression type: %d", + (gint) compression); + return FALSE; + } + + info->compression = compression; + + gimp_image_set_xcf_compression (image, + compression >= COMPRESS_ZLIB); + + GIMP_LOG (XCF, "prop compression=%d", compression); + } + break; + + case PROP_GUIDES: + { + GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image); + gint32 position; + gint8 orientation; + gint i, nguides; + + nguides = prop_size / (4 + 1); + for (i = 0; i < nguides; i++) + { + xcf_read_int32 (info, (guint32 *) &position, 1); + xcf_read_int8 (info, (guint8 *) &orientation, 1); + + /* skip -1 guides from old XCFs */ + if (position < 0) + continue; + + GIMP_LOG (XCF, "prop guide orientation=%d position=%d", + orientation, position); + + switch (orientation) + { + case XCF_ORIENTATION_HORIZONTAL: + gimp_image_add_hguide (image, position, FALSE); + break; + + case XCF_ORIENTATION_VERTICAL: + gimp_image_add_vguide (image, position, FALSE); + break; + + default: + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Guide orientation out of range in XCF file"); + continue; + } + } + + /* this is silly as the order of guides doesn't really matter, + * but it restores the list to its original order, which + * cannot be wrong --Mitch + */ + private->guides = g_list_reverse (private->guides); + } + break; + + case PROP_SAMPLE_POINTS: + { + gint n_sample_points, i; + + n_sample_points = prop_size / (5 * 4); + for (i = 0; i < n_sample_points; i++) + { + GimpSamplePoint *sample_point; + gint32 x, y; + GimpColorPickMode pick_mode; + guint32 padding[2] = { 0, }; + + xcf_read_int32 (info, (guint32 *) &x, 1); + xcf_read_int32 (info, (guint32 *) &y, 1); + xcf_read_int32 (info, (guint32 *) &pick_mode, 1); + xcf_read_int32 (info, (guint32 *) padding, 2); + + GIMP_LOG (XCF, "prop sample point x=%d y=%d mode=%d", + x, y, pick_mode); + + if (pick_mode > GIMP_COLOR_PICK_MODE_LAST) + pick_mode = GIMP_COLOR_PICK_MODE_PIXEL; + + sample_point = gimp_image_add_sample_point_at_pos (image, + x, y, FALSE); + gimp_image_set_sample_point_pick_mode (image, sample_point, + pick_mode, FALSE); + } + } + break; + + case PROP_OLD_SAMPLE_POINTS: + { + gint32 x, y; + gint i, n_sample_points; + + /* if there are already sample points, we loaded the new + * prop before + */ + if (gimp_image_get_sample_points (image)) + { + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + + break; + } + + n_sample_points = prop_size / (4 + 4); + for (i = 0; i < n_sample_points; i++) + { + xcf_read_int32 (info, (guint32 *) &x, 1); + xcf_read_int32 (info, (guint32 *) &y, 1); + + GIMP_LOG (XCF, "prop old sample point x=%d y=%d", x, y); + + gimp_image_add_sample_point_at_pos (image, x, y, FALSE); + } + } + break; + + case PROP_RESOLUTION: + { + gfloat xres, yres; + + xcf_read_float (info, &xres, 1); + xcf_read_float (info, &yres, 1); + + GIMP_LOG (XCF, "prop resolution x=%f y=%f", xres, yres); + + if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION || + yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION) + { + GimpTemplate *template = image->gimp->config->default_image; + + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, resolution out of range in XCF file"); + xres = gimp_template_get_resolution_x (template); + yres = gimp_template_get_resolution_y (template); + } + + gimp_image_set_resolution (image, xres, yres); + } + break; + + case PROP_TATTOO: + { + xcf_read_int32 (info, &info->tattoo_state, 1); + + GIMP_LOG (XCF, "prop tattoo state=%d", info->tattoo_state); + } + break; + + case PROP_PARASITES: + { + goffset base = info->cp; + + while (info->cp - base < prop_size) + { + GimpParasite *p = xcf_load_parasite (info); + GError *error = NULL; + + if (! p) + return FALSE; + + if (! gimp_image_parasite_validate (image, p, &error)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, invalid image parasite in XCF file: %s", + error->message); + g_clear_error (&error); + } + else + { + gimp_image_parasite_attach (image, p, FALSE); + } + + gimp_parasite_free (p); + } + + if (info->cp - base != prop_size) + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Error while loading an image's parasites"); + } + break; + + case PROP_UNIT: + { + guint32 unit; + + xcf_read_int32 (info, &unit, 1); + + GIMP_LOG (XCF, "prop unit=%d", unit); + + if ((unit <= GIMP_UNIT_PIXEL) || + (unit >= gimp_unit_get_number_of_built_in_units ())) + { + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, unit out of range in XCF file, " + "falling back to inches"); + unit = GIMP_UNIT_INCH; + } + + gimp_image_set_unit (image, unit); + } + break; + + case PROP_PATHS: + xcf_load_old_paths (info, image); + break; + + case PROP_USER_UNIT: + { + gchar *unit_strings[5]; + float factor; + guint32 digits; + GimpUnit unit; + gint num_units; + gint i; + + xcf_read_float (info, &factor, 1); + xcf_read_int32 (info, &digits, 1); + xcf_read_string (info, unit_strings, 5); + + for (i = 0; i < 5; i++) + if (unit_strings[i] == NULL) + unit_strings[i] = g_strdup (""); + + num_units = gimp_unit_get_number_of_units (); + + for (unit = gimp_unit_get_number_of_built_in_units (); + unit < num_units; unit++) + { + /* if the factor and the identifier match some unit + * in unitrc, use the unitrc unit + */ + if ((ABS (gimp_unit_get_factor (unit) - factor) < 1e-5) && + (strcmp (unit_strings[0], + gimp_unit_get_identifier (unit)) == 0)) + { + break; + } + } + + /* no match */ + if (unit == num_units) + unit = gimp_unit_new (unit_strings[0], + factor, + digits, + unit_strings[1], + unit_strings[2], + unit_strings[3], + unit_strings[4]); + + gimp_image_set_unit (image, unit); + + for (i = 0; i < 5; i++) + g_free (unit_strings[i]); + } + break; + + case PROP_VECTORS: + { + goffset base = info->cp; + + if (xcf_load_vectors (info, image)) + { + if (base + prop_size != info->cp) + { + g_printerr ("Mismatch in PROP_VECTORS size: " + "skipping %" G_GOFFSET_FORMAT " bytes.\n", + base + prop_size - info->cp); + xcf_seek_pos (info, base + prop_size, NULL); + } + } + else + { + /* skip silently since we don't understand the format and + * xcf_load_vectors already explained what was wrong + */ + xcf_seek_pos (info, base + prop_size, NULL); + } + } + break; + + default: +#ifdef GIMP_UNSTABLE + g_printerr ("unexpected/unknown image property: %d (skipping)\n", + prop_type); +#endif + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + } + } + + return FALSE; +} + +static gboolean +xcf_load_layer_props (XcfInfo *info, + GimpImage *image, + GimpLayer **layer, + GList **item_path, + gboolean *apply_mask, + gboolean *edit_mask, + gboolean *show_mask, + guint32 *text_layer_flags, + guint32 *group_layer_flags) +{ + PropType prop_type; + guint32 prop_size; + + while (TRUE) + { + if (! xcf_load_prop (info, &prop_type, &prop_size)) + return FALSE; + + switch (prop_type) + { + case PROP_END: + return TRUE; + + case PROP_ACTIVE_LAYER: + info->active_layer = *layer; + break; + + case PROP_FLOATING_SELECTION: + info->floating_sel = *layer; + xcf_read_offset (info, &info->floating_sel_offset, 1); + break; + + case PROP_OPACITY: + { + guint32 opacity; + + xcf_read_int32 (info, &opacity, 1); + + gimp_layer_set_opacity (*layer, (gdouble) opacity / 255.0, FALSE); + } + break; + + case PROP_FLOAT_OPACITY: + { + gfloat opacity; + + xcf_read_float (info, &opacity, 1); + + gimp_layer_set_opacity (*layer, opacity, FALSE); + } + break; + + case PROP_VISIBLE: + { + gboolean visible; + + xcf_read_int32 (info, (guint32 *) &visible, 1); + + gimp_item_set_visible (GIMP_ITEM (*layer), visible, FALSE); + } + break; + + case PROP_LINKED: + { + gboolean linked; + + xcf_read_int32 (info, (guint32 *) &linked, 1); + + gimp_item_set_linked (GIMP_ITEM (*layer), linked, FALSE); + } + break; + + case PROP_COLOR_TAG: + { + GimpColorTag color_tag; + + xcf_read_int32 (info, (guint32 *) &color_tag, 1); + + gimp_item_set_color_tag (GIMP_ITEM (*layer), color_tag, FALSE); + } + break; + + case PROP_LOCK_CONTENT: + { + gboolean lock_content; + + xcf_read_int32 (info, (guint32 *) &lock_content, 1); + + if (gimp_item_can_lock_content (GIMP_ITEM (*layer))) + gimp_item_set_lock_content (GIMP_ITEM (*layer), + lock_content, FALSE); + } + break; + + case PROP_LOCK_ALPHA: + { + gboolean lock_alpha; + + xcf_read_int32 (info, (guint32 *) &lock_alpha, 1); + + if (gimp_layer_can_lock_alpha (*layer)) + gimp_layer_set_lock_alpha (*layer, lock_alpha, FALSE); + } + break; + + case PROP_LOCK_POSITION: + { + gboolean lock_position; + + xcf_read_int32 (info, (guint32 *) &lock_position, 1); + + if (gimp_item_can_lock_position (GIMP_ITEM (*layer))) + gimp_item_set_lock_position (GIMP_ITEM (*layer), + lock_position, FALSE); + } + break; + + case PROP_APPLY_MASK: + xcf_read_int32 (info, (guint32 *) apply_mask, 1); + break; + + case PROP_EDIT_MASK: + xcf_read_int32 (info, (guint32 *) edit_mask, 1); + break; + + case PROP_SHOW_MASK: + xcf_read_int32 (info, (guint32 *) show_mask, 1); + break; + + case PROP_OFFSETS: + { + gint32 offset_x; + gint32 offset_y; + + xcf_read_int32 (info, (guint32 *) &offset_x, 1); + xcf_read_int32 (info, (guint32 *) &offset_y, 1); + + if (offset_x < -GIMP_MAX_IMAGE_SIZE || + offset_x > GIMP_MAX_IMAGE_SIZE) + { + g_printerr ("unexpected item offset_x (%d) in XCF, " + "setting to 0\n", offset_x); + offset_x = 0; + } + + if (offset_y < -GIMP_MAX_IMAGE_SIZE || + offset_y > GIMP_MAX_IMAGE_SIZE) + { + g_printerr ("unexpected item offset_y (%d) in XCF, " + "setting to 0\n", offset_y); + offset_y = 0; + } + + gimp_item_set_offset (GIMP_ITEM (*layer), offset_x, offset_y); + } + break; + + case PROP_MODE: + { + GimpLayerMode mode; + + xcf_read_int32 (info, (guint32 *) &mode, 1); + + if (mode == GIMP_LAYER_MODE_OVERLAY_LEGACY) + mode = GIMP_LAYER_MODE_SOFTLIGHT_LEGACY; + + gimp_layer_set_mode (*layer, mode, FALSE); + } + break; + + case PROP_BLEND_SPACE: + { + gint32 blend_space; + + xcf_read_int32 (info, (guint32 *) &blend_space, 1); + + /* if blend_space < 0 it was originally AUTO, and its negative is + * the actual value AUTO used to map to at the time the file was + * saved. if AUTO still maps to the same value, keep using AUTO + * for the property; otherwise, use the concrete value. + */ + if (blend_space < 0) + { + GimpLayerMode mode = gimp_layer_get_mode (*layer); + + blend_space = -blend_space; + + if (blend_space == gimp_layer_mode_get_blend_space (mode)) + blend_space = GIMP_LAYER_COLOR_SPACE_AUTO; + else + GIMP_LOG (XCF, "BLEND_SPACE: AUTO => %d", blend_space); + } + + gimp_layer_set_blend_space (*layer, blend_space, FALSE); + } + break; + + case PROP_COMPOSITE_SPACE: + { + gint32 composite_space; + + xcf_read_int32 (info, (guint32 *) &composite_space, 1); + + /* if composite_space < 0 it was originally AUTO, and its negative + * is the actual value AUTO used to map to at the time the file was + * saved. if AUTO still maps to the same value, keep using AUTO + * for the property; otherwise, use the concrete value. + */ + if (composite_space < 0) + { + GimpLayerMode mode = gimp_layer_get_mode (*layer); + + composite_space = -composite_space; + + if (composite_space == gimp_layer_mode_get_composite_space (mode)) + composite_space = GIMP_LAYER_COLOR_SPACE_AUTO; + else + GIMP_LOG (XCF, "COMPOSITE_SPACE: AUTO => %d", composite_space); + } + + gimp_layer_set_composite_space (*layer, composite_space, FALSE); + } + break; + + case PROP_COMPOSITE_MODE: + { + gint32 composite_mode; + + xcf_read_int32 (info, (guint32 *) &composite_mode, 1); + + /* if composite_mode < 0 it was originally AUTO, and its negative + * is the actual value AUTO used to map to at the time the file was + * saved. if AUTO still maps to the same value, keep using AUTO + * for the property; otherwise, use the concrete value. + */ + if (composite_mode < 0) + { + GimpLayerMode mode = gimp_layer_get_mode (*layer); + + composite_mode = -composite_mode; + + if (composite_mode == gimp_layer_mode_get_composite_mode (mode)) + composite_mode = GIMP_LAYER_COMPOSITE_AUTO; + else + GIMP_LOG (XCF, "COMPOSITE_MODE: AUTO => %d", composite_mode); + } + + gimp_layer_set_composite_mode (*layer, composite_mode, FALSE); + } + break; + + case PROP_TATTOO: + { + GimpTattoo tattoo; + + xcf_read_int32 (info, (guint32 *) &tattoo, 1); + + gimp_item_set_tattoo (GIMP_ITEM (*layer), tattoo); + } + break; + + case PROP_PARASITES: + { + goffset base = info->cp; + + while (info->cp - base < prop_size) + { + GimpParasite *p = xcf_load_parasite (info); + GError *error = NULL; + + if (! p) + return FALSE; + + if (! gimp_item_parasite_validate (GIMP_ITEM (*layer), p, &error)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, invalid layer parasite in XCF file: %s", + error->message); + g_clear_error (&error); + } + else + { + gimp_item_parasite_attach (GIMP_ITEM (*layer), p, FALSE); + } + + gimp_parasite_free (p); + } + + if (info->cp - base != prop_size) + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Error while loading a layer's parasites"); + } + break; + + case PROP_TEXT_LAYER_FLAGS: + xcf_read_int32 (info, text_layer_flags, 1); + break; + + case PROP_GROUP_ITEM: + { + GimpLayer *group; + gboolean is_active_layer; + + /* We're going to delete *layer, Don't leave its pointers + * in @info. After that, we'll restore them back with the + * new pointer. See bug #767873. + */ + is_active_layer = (*layer == info->active_layer); + if (is_active_layer) + info->active_layer = NULL; + + if (*layer == info->floating_sel) + info->floating_sel = NULL; + + group = gimp_group_layer_new (image); + + gimp_object_set_name (GIMP_OBJECT (group), + gimp_object_get_name (*layer)); + + g_object_ref_sink (*layer); + g_object_unref (*layer); + *layer = group; + + if (is_active_layer) + info->active_layer = *layer; + + /* Don't restore info->floating_sel because group layers + * can't be floating selections + */ + } + break; + + case PROP_ITEM_PATH: + { + goffset base = info->cp; + GList *path = NULL; + + while (info->cp - base < prop_size) + { + guint32 index; + + if (xcf_read_int32 (info, &index, 1) != 4) + { + g_list_free (path); + return FALSE; + } + + path = g_list_append (path, GUINT_TO_POINTER (index)); + } + + *item_path = path; + } + break; + + case PROP_GROUP_ITEM_FLAGS: + xcf_read_int32 (info, group_layer_flags, 1); + break; + + default: +#ifdef GIMP_UNSTABLE + g_printerr ("unexpected/unknown layer property: %d (skipping)\n", + prop_type); +#endif + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + } + } + + return FALSE; +} + +static gboolean +xcf_check_layer_props (XcfInfo *info, + GList **item_path, + gboolean *is_group_layer, + gboolean *is_text_layer) +{ + PropType prop_type; + guint32 prop_size; + + g_return_val_if_fail (*is_group_layer == FALSE, FALSE); + g_return_val_if_fail (*is_text_layer == FALSE, FALSE); + + while (TRUE) + { + if (! xcf_load_prop (info, &prop_type, &prop_size)) + return FALSE; + + switch (prop_type) + { + case PROP_END: + return TRUE; + + case PROP_TEXT_LAYER_FLAGS: + *is_text_layer = TRUE; + + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + + case PROP_GROUP_ITEM: + case PROP_GROUP_ITEM_FLAGS: + *is_group_layer = TRUE; + + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + + case PROP_ITEM_PATH: + { + goffset base = info->cp; + GList *path = NULL; + + while (info->cp - base < prop_size) + { + guint32 index; + + if (xcf_read_int32 (info, &index, 1) != 4) + { + g_list_free (path); + return FALSE; + } + + path = g_list_append (path, GUINT_TO_POINTER (index)); + } + + *item_path = path; + } + break; + + case PROP_ACTIVE_LAYER: + case PROP_FLOATING_SELECTION: + case PROP_OPACITY: + case PROP_FLOAT_OPACITY: + case PROP_VISIBLE: + case PROP_LINKED: + case PROP_COLOR_TAG: + case PROP_LOCK_CONTENT: + case PROP_LOCK_ALPHA: + case PROP_LOCK_POSITION: + case PROP_APPLY_MASK: + case PROP_EDIT_MASK: + case PROP_SHOW_MASK: + case PROP_OFFSETS: + case PROP_MODE: + case PROP_BLEND_SPACE: + case PROP_COMPOSITE_SPACE: + case PROP_COMPOSITE_MODE: + case PROP_TATTOO: + case PROP_PARASITES: + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + /* Just ignore for now. */ + break; + + default: +#ifdef GIMP_UNSTABLE + g_printerr ("unexpected/unknown layer property: %d (skipping)\n", + prop_type); +#endif + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + } + } + + return FALSE; +} + +static gboolean +xcf_load_channel_props (XcfInfo *info, + GimpImage *image, + GimpChannel **channel) +{ + PropType prop_type; + guint32 prop_size; + + while (TRUE) + { + if (! xcf_load_prop (info, &prop_type, &prop_size)) + return FALSE; + + switch (prop_type) + { + case PROP_END: + return TRUE; + + case PROP_ACTIVE_CHANNEL: + info->active_channel = *channel; + break; + + case PROP_SELECTION: + { + GimpChannel *mask; + + /* We're going to delete *channel, Don't leave its pointer + * in @info. See bug #767873. + */ + if (*channel == info->active_channel) + info->active_channel = NULL; + + mask = + gimp_selection_new (image, + gimp_item_get_width (GIMP_ITEM (*channel)), + gimp_item_get_height (GIMP_ITEM (*channel))); + gimp_image_take_mask (image, mask); + + gimp_drawable_steal_buffer (GIMP_DRAWABLE (mask), + GIMP_DRAWABLE (*channel)); + g_object_unref (*channel); + *channel = mask; + + /* Don't restore info->active_channel because the + * selection can't be the active channel + */ + } + break; + + case PROP_OPACITY: + { + guint32 opacity; + + xcf_read_int32 (info, &opacity, 1); + + gimp_channel_set_opacity (*channel, opacity / 255.0, FALSE); + } + break; + + case PROP_FLOAT_OPACITY: + { + gfloat opacity; + + xcf_read_float (info, &opacity, 1); + + gimp_channel_set_opacity (*channel, opacity, FALSE); + } + break; + + case PROP_VISIBLE: + { + gboolean visible; + + xcf_read_int32 (info, (guint32 *) &visible, 1); + + gimp_item_set_visible (GIMP_ITEM (*channel), visible, FALSE); + } + break; + + case PROP_COLOR_TAG: + { + GimpColorTag color_tag; + + xcf_read_int32 (info, (guint32 *) &color_tag, 1); + + gimp_item_set_color_tag (GIMP_ITEM (*channel), color_tag, FALSE); + } + break; + + case PROP_LINKED: + { + gboolean linked; + + xcf_read_int32 (info, (guint32 *) &linked, 1); + + gimp_item_set_linked (GIMP_ITEM (*channel), linked, FALSE); + } + break; + + case PROP_LOCK_CONTENT: + { + gboolean lock_content; + + xcf_read_int32 (info, (guint32 *) &lock_content, 1); + + if (gimp_item_can_lock_content (GIMP_ITEM (*channel))) + gimp_item_set_lock_content (GIMP_ITEM (*channel), + lock_content, FALSE); + } + break; + + case PROP_LOCK_POSITION: + { + gboolean lock_position; + + xcf_read_int32 (info, (guint32 *) &lock_position, 1); + + if (gimp_item_can_lock_position (GIMP_ITEM (*channel))) + gimp_item_set_lock_position (GIMP_ITEM (*channel), + lock_position, FALSE); + } + break; + + case PROP_SHOW_MASKED: + { + gboolean show_masked; + + xcf_read_int32 (info, (guint32 *) &show_masked, 1); + + gimp_channel_set_show_masked (*channel, show_masked); + } + break; + + case PROP_COLOR: + { + guchar col[3]; + + xcf_read_int8 (info, (guint8 *) col, 3); + + gimp_rgb_set_uchar (&(*channel)->color, col[0], col[1], col[2]); + } + break; + + case PROP_FLOAT_COLOR: + { + gfloat col[3]; + + xcf_read_float (info, col, 3); + + gimp_rgb_set (&(*channel)->color, col[0], col[1], col[2]); + } + break; + + case PROP_TATTOO: + { + GimpTattoo tattoo; + + xcf_read_int32 (info, (guint32 *) &tattoo, 1); + + gimp_item_set_tattoo (GIMP_ITEM (*channel), tattoo); + } + break; + + case PROP_PARASITES: + { + goffset base = info->cp; + + while ((info->cp - base) < prop_size) + { + GimpParasite *p = xcf_load_parasite (info); + GError *error = NULL; + + if (! p) + return FALSE; + + if (! gimp_item_parasite_validate (GIMP_ITEM (*channel), p, + &error)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, invalid channel parasite in XCF file: %s", + error->message); + g_clear_error (&error); + } + else + { + gimp_item_parasite_attach (GIMP_ITEM (*channel), p, FALSE); + } + + gimp_parasite_free (p); + } + + if (info->cp - base != prop_size) + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Error while loading a channel's parasites"); + } + break; + + default: +#ifdef GIMP_UNSTABLE + g_printerr ("unexpected/unknown channel property: %d (skipping)\n", + prop_type); +#endif + if (! xcf_skip_unknown_prop (info, prop_size)) + return FALSE; + break; + } + } + + return FALSE; +} + +static gboolean +xcf_load_prop (XcfInfo *info, + PropType *prop_type, + guint32 *prop_size) +{ + if (G_UNLIKELY (xcf_read_int32 (info, (guint32 *) prop_type, 1) != 4)) + return FALSE; + + if (G_UNLIKELY (xcf_read_int32 (info, (guint32 *) prop_size, 1) != 4)) + return FALSE; + + return TRUE; +} + +static GimpLayer * +xcf_load_layer (XcfInfo *info, + GimpImage *image, + GList **item_path) +{ + GimpLayer *layer; + GimpLayerMask *layer_mask; + goffset hierarchy_offset; + goffset layer_mask_offset; + gboolean apply_mask = TRUE; + gboolean edit_mask = FALSE; + gboolean show_mask = FALSE; + gboolean active; + gboolean floating; + guint32 group_layer_flags = 0; + guint32 text_layer_flags = 0; + gint width; + gint height; + gint type; + GimpImageBaseType base_type; + gboolean has_alpha; + const Babl *format; + gboolean is_fs_drawable; + gchar *name; + + /* check and see if this is the drawable the floating selection + * is attached to. if it is then we'll do the attachment in our caller. + */ + is_fs_drawable = (info->cp == info->floating_sel_offset); + + /* read in the layer width, height, type and name */ + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + xcf_read_int32 (info, (guint32 *) &type, 1); + xcf_read_string (info, &name, 1); + + GIMP_LOG (XCF, "width=%d, height=%d, type=%d, name='%s'", + width, height, type, name); + + switch (type) + { + case GIMP_RGB_IMAGE: + base_type = GIMP_RGB; + has_alpha = FALSE; + break; + + case GIMP_RGBA_IMAGE: + base_type = GIMP_RGB; + has_alpha = TRUE; + break; + + case GIMP_GRAY_IMAGE: + base_type = GIMP_GRAY; + has_alpha = FALSE; + break; + + case GIMP_GRAYA_IMAGE: + base_type = GIMP_GRAY; + has_alpha = TRUE; + break; + + case GIMP_INDEXED_IMAGE: + base_type = GIMP_INDEXED; + has_alpha = FALSE; + break; + + case GIMP_INDEXEDA_IMAGE: + base_type = GIMP_INDEXED; + has_alpha = TRUE; + break; + + default: + return NULL; + } + + if (width <= 0 || height <= 0) + { + gboolean is_group_layer = FALSE; + gboolean is_text_layer = FALSE; + goffset saved_pos; + + saved_pos = info->cp; + /* Load item path and check if this is a group or text layer. */ + xcf_check_layer_props (info, item_path, &is_group_layer, &is_text_layer); + if ((is_text_layer || is_group_layer) && + xcf_seek_pos (info, saved_pos, NULL)) + { + /* Something is wrong, but leave a chance to the layer because + * anyway group and text layer depends on their contents. + */ + width = height = 1; + g_clear_pointer (item_path, g_list_free); + } + else + { + return NULL; + } + } + + /* do not use gimp_image_get_layer_format() because it might + * be the floating selection of a channel or mask + */ + format = gimp_image_get_format (image, base_type, + gimp_image_get_precision (image), + has_alpha); + + /* create a new layer */ + layer = gimp_layer_new (image, width, height, + format, name, + GIMP_OPACITY_OPAQUE, GIMP_LAYER_MODE_NORMAL); + g_free (name); + if (! layer) + return NULL; + + /* read in the layer properties */ + if (! xcf_load_layer_props (info, image, &layer, item_path, + &apply_mask, &edit_mask, &show_mask, + &text_layer_flags, &group_layer_flags)) + goto error; + + GIMP_LOG (XCF, "layer props loaded"); + + xcf_progress_update (info); + + /* call the evil text layer hack that might change our layer pointer */ + active = (info->active_layer == layer); + floating = (info->floating_sel == layer); + + if (gimp_text_layer_xcf_load_hack (&layer)) + { + gimp_text_layer_set_xcf_flags (GIMP_TEXT_LAYER (layer), + text_layer_flags); + + if (active) + info->active_layer = layer; + if (floating) + info->floating_sel = layer; + } + + /* read the hierarchy and layer mask offsets */ + xcf_read_offset (info, &hierarchy_offset, 1); + xcf_read_offset (info, &layer_mask_offset, 1); + + /* read in the hierarchy (ignore it for group layers, both as an + * optimization and because the hierarchy's extents don't match + * the group layer's tiles) + */ + if (! gimp_viewable_get_children (GIMP_VIEWABLE (layer))) + { + if (! xcf_seek_pos (info, hierarchy_offset, NULL)) + goto error; + + GIMP_LOG (XCF, "loading buffer"); + + if (! xcf_load_buffer (info, + gimp_drawable_get_buffer (GIMP_DRAWABLE (layer)))) + goto error; + + GIMP_LOG (XCF, "buffer loaded"); + + xcf_progress_update (info); + } + else + { + gboolean expanded = group_layer_flags & XCF_GROUP_ITEM_EXPANDED; + + gimp_viewable_set_expanded (GIMP_VIEWABLE (layer), expanded); + } + + /* read in the layer mask */ + if (layer_mask_offset != 0) + { + if (! xcf_seek_pos (info, layer_mask_offset, NULL)) + goto error; + + layer_mask = xcf_load_layer_mask (info, image); + if (! layer_mask) + goto error; + + xcf_progress_update (info); + + /* don't add the layer mask yet, that won't work for group + * layers which update their size automatically; instead + * attach it so it can be added when all layers are loaded + */ + g_object_set_data_full (G_OBJECT (layer), "gimp-layer-mask", + g_object_ref_sink (layer_mask), + (GDestroyNotify) g_object_unref); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-apply", + GINT_TO_POINTER (apply_mask)); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-edit", + GINT_TO_POINTER (edit_mask)); + g_object_set_data (G_OBJECT (layer), "gimp-layer-mask-show", + GINT_TO_POINTER (show_mask)); + } + + /* attach the floating selection... */ + if (is_fs_drawable) + info->floating_sel_drawable = GIMP_DRAWABLE (layer); + + return layer; + + error: + if (info->active_layer == layer) + info->active_layer = NULL; + + if (info->floating_sel == layer) + info->floating_sel = NULL; + + if (info->floating_sel_drawable == GIMP_DRAWABLE (layer)) + info->floating_sel_drawable = NULL; + + g_object_unref (layer); + + return NULL; +} + +static GimpChannel * +xcf_load_channel (XcfInfo *info, + GimpImage *image) +{ + GimpChannel *channel; + goffset hierarchy_offset; + gint width; + gint height; + gboolean is_fs_drawable; + gchar *name; + GimpRGB color = { 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE }; + + /* check and see if this is the drawable the floating selection + * is attached to. if it is then we'll do the attachment in our caller. + */ + is_fs_drawable = (info->cp == info->floating_sel_offset); + + /* read in the layer width, height and name */ + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + if (width <= 0 || height <= 0) + return NULL; + + xcf_read_string (info, &name, 1); + + /* create a new channel */ + channel = gimp_channel_new (image, width, height, name, &color); + g_free (name); + if (!channel) + return NULL; + + /* read in the channel properties */ + if (! xcf_load_channel_props (info, image, &channel)) + goto error; + + xcf_progress_update (info); + + /* read the hierarchy and layer mask offsets */ + xcf_read_offset (info, &hierarchy_offset, 1); + + /* read in the hierarchy */ + if (! xcf_seek_pos (info, hierarchy_offset, NULL)) + goto error; + + if (! xcf_load_buffer (info, + gimp_drawable_get_buffer (GIMP_DRAWABLE (channel)))) + goto error; + + xcf_progress_update (info); + + if (is_fs_drawable) + info->floating_sel_drawable = GIMP_DRAWABLE (channel); + + return channel; + + error: + /* don't unref the selection of a partially loaded XCF */ + if (channel != gimp_image_get_mask (image)) + { + if (info->active_channel == channel) + info->active_channel = NULL; + + if (info->floating_sel_drawable == GIMP_DRAWABLE (channel)) + info->floating_sel_drawable = NULL; + + g_object_unref (channel); + } + + return NULL; +} + +static GimpLayerMask * +xcf_load_layer_mask (XcfInfo *info, + GimpImage *image) +{ + GimpLayerMask *layer_mask; + GimpChannel *channel; + goffset hierarchy_offset; + gint width; + gint height; + gboolean is_fs_drawable; + gchar *name; + GimpRGB color = { 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE }; + + /* check and see if this is the drawable the floating selection + * is attached to. if it is then we'll do the attachment in our caller. + */ + is_fs_drawable = (info->cp == info->floating_sel_offset); + + /* read in the layer width, height and name */ + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + if (width <= 0 || height <= 0) + return NULL; + + xcf_read_string (info, &name, 1); + + /* create a new layer mask */ + layer_mask = gimp_layer_mask_new (image, width, height, name, &color); + g_free (name); + if (! layer_mask) + return NULL; + + /* read in the layer_mask properties */ + channel = GIMP_CHANNEL (layer_mask); + if (! xcf_load_channel_props (info, image, &channel)) + goto error; + + xcf_progress_update (info); + + /* read the hierarchy and layer mask offsets */ + xcf_read_offset (info, &hierarchy_offset, 1); + + /* read in the hierarchy */ + if (! xcf_seek_pos (info, hierarchy_offset, NULL)) + goto error; + + if (! xcf_load_buffer (info, + gimp_drawable_get_buffer (GIMP_DRAWABLE (layer_mask)))) + goto error; + + xcf_progress_update (info); + + /* attach the floating selection... */ + if (is_fs_drawable) + info->floating_sel_drawable = GIMP_DRAWABLE (layer_mask); + + return layer_mask; + + error: + if (info->active_channel == GIMP_CHANNEL (layer_mask)) + info->active_channel = NULL; + + if (info->floating_sel_drawable == GIMP_DRAWABLE (layer_mask)) + info->floating_sel_drawable = NULL; + + g_object_unref (layer_mask); + + return NULL; +} + +static gboolean +xcf_load_buffer (XcfInfo *info, + GeglBuffer *buffer) +{ + const Babl *format; + goffset offset; + gint width; + gint height; + gint bpp; + + format = gegl_buffer_get_format (buffer); + + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + xcf_read_int32 (info, (guint32 *) &bpp, 1); + + /* make sure the values in the file correspond to the values + * calculated when the GeglBuffer was created. + */ + if (width != gegl_buffer_get_width (buffer) || + height != gegl_buffer_get_height (buffer) || + bpp != babl_format_get_bytes_per_pixel (format)) + return FALSE; + + xcf_read_offset (info, &offset, 1); /* top level */ + + /* seek to the level offset */ + if (! xcf_seek_pos (info, offset, NULL)) + return FALSE; + + /* read in the level */ + if (! xcf_load_level (info, buffer)) + return FALSE; + + /* discard levels below first. + */ + + return TRUE; +} + + +static gboolean +xcf_load_level (XcfInfo *info, + GeglBuffer *buffer) +{ + const Babl *format; + gint bpp; + goffset saved_pos; + goffset offset; + goffset offset2; + goffset max_data_length; + gint n_tile_rows; + gint n_tile_cols; + guint ntiles; + gint width; + gint height; + gint i; + gint fail; + + format = gegl_buffer_get_format (buffer); + bpp = babl_format_get_bytes_per_pixel (format); + + xcf_read_int32 (info, (guint32 *) &width, 1); + xcf_read_int32 (info, (guint32 *) &height, 1); + + if (width != gegl_buffer_get_width (buffer) || + height != gegl_buffer_get_height (buffer)) + return FALSE; + + /* maximal allowable size of on-disk tile data. make it somewhat bigger than + * the uncompressed tile size, to allow for the possibility of negative + * compression. + */ + max_data_length = XCF_TILE_WIDTH * XCF_TILE_HEIGHT * bpp * + XCF_TILE_MAX_DATA_LENGTH_FACTOR /* = 1.5, currently */; + + /* read in the first tile offset. + * if it is '0', then this tile level is empty + * and we can simply return. + */ + xcf_read_offset (info, &offset, 1); + if (offset == 0) + return TRUE; + + n_tile_rows = gimp_gegl_buffer_get_n_tile_rows (buffer, XCF_TILE_HEIGHT); + n_tile_cols = gimp_gegl_buffer_get_n_tile_cols (buffer, XCF_TILE_WIDTH); + + ntiles = n_tile_rows * n_tile_cols; + for (i = 0; i < ntiles; i++) + { + GeglRectangle rect; + + fail = FALSE; + + if (offset == 0) + { + gimp_message_literal (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_ERROR, + "not enough tiles found in level"); + return FALSE; + } + + /* save the current position as it is where the + * next tile offset is stored. + */ + saved_pos = info->cp; + + /* read in the offset of the next tile so we can calculate the amount + * of data needed for this tile + */ + xcf_read_offset (info, &offset2, 1); + + /* if the offset is 0 then we need to read in the maximum possible + * allowing for negative compression + */ + if (offset2 == 0) + offset2 = offset + max_data_length; + + /* seek to the tile offset */ + if (! xcf_seek_pos (info, offset, NULL)) + return FALSE; + + if (offset2 < offset || offset2 - offset > max_data_length) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_ERROR, + "invalid tile data length: %" G_GOFFSET_FORMAT, + offset2 - offset); + return FALSE; + } + + /* get buffer rectangle to write to */ + gimp_gegl_buffer_get_tile_rect (buffer, + XCF_TILE_WIDTH, XCF_TILE_HEIGHT, + i, &rect); + + GIMP_LOG (XCF, "loading tile %d/%d", i + 1, ntiles); + + /* read in the tile */ + switch (info->compression) + { + case COMPRESS_NONE: + if (! xcf_load_tile (info, buffer, &rect, format)) + fail = TRUE; + break; + case COMPRESS_RLE: + if (! xcf_load_tile_rle (info, buffer, &rect, format, + offset2 - offset)) + fail = TRUE; + break; + case COMPRESS_ZLIB: + if (! xcf_load_tile_zlib (info, buffer, &rect, format, + offset2 - offset)) + fail = TRUE; + break; + case COMPRESS_FRACTAL: + g_printerr ("xcf: fractal compression unimplemented. " + "Possibly corrupt XCF file."); + fail = TRUE; + break; + default: + g_printerr ("xcf: unknown compression. " + "Possibly corrupt XCF file."); + fail = TRUE; + break; + } + + if (fail) + return FALSE; + + GIMP_LOG (XCF, "loaded tile %d/%d", i + 1, ntiles); + + /* restore the saved position so we'll be ready to + * read the next offset. + */ + if (!xcf_seek_pos (info, saved_pos, NULL)) + return FALSE; + + /* read in the offset of the next tile */ + xcf_read_offset (info, &offset, 1); + } + + if (offset != 0) + { + gimp_message (info->gimp, G_OBJECT (info->progress), GIMP_MESSAGE_ERROR, + "encountered garbage after reading level: %" G_GOFFSET_FORMAT, + offset); + return FALSE; + } + + return TRUE; +} + +static gboolean +xcf_load_tile (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format) +{ + gint bpp = babl_format_get_bytes_per_pixel (format); + gint tile_size = bpp * tile_rect->width * tile_rect->height; + guchar *tile_data = g_alloca (tile_size); + + if (info->file_version <= 11) + { + xcf_read_int8 (info, tile_data, tile_size); + } + else + { + gint n_components = babl_format_get_n_components (format); + + xcf_read_component (info, bpp / n_components, tile_data, + tile_size / bpp * n_components); + } + + if (! xcf_data_is_zero (tile_data, tile_size)) + { + gegl_buffer_set (buffer, tile_rect, 0, format, tile_data, + GEGL_AUTO_ROWSTRIDE); + } + + return TRUE; +} + +static gboolean +xcf_load_tile_rle (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format, + gint data_length) +{ + gint bpp = babl_format_get_bytes_per_pixel (format); + gint tile_size = bpp * tile_rect->width * tile_rect->height; + guchar *tile_data = g_alloca (tile_size); + guchar nonzero = FALSE; + gsize bytes_read; + gint i; + guchar *xcfdata; + guchar *xcfodata; + guchar *xcfdatalimit; + + /* Workaround for bug #357809: avoid crashing on g_malloc() and skip + * this tile (return TRUE without storing data) as if it did not + * contain any data. It is better than returning FALSE, which would + * skip the whole hierarchy while there may still be some valid + * tiles in the file. + */ + if (data_length <= 0) + return TRUE; + + xcfdata = xcfodata = g_alloca (data_length); + + /* we have to read directly instead of xcf_read_* because we may be + * reading past the end of the file here + */ + g_input_stream_read_all (info->input, xcfdata, data_length, + &bytes_read, NULL, NULL); + info->cp += bytes_read; + + if (bytes_read == 0) + return TRUE; + + xcfdatalimit = &xcfodata[bytes_read - 1]; + + for (i = 0; i < bpp; i++) + { + guchar *data = tile_data + i; + gint size = tile_rect->width * tile_rect->height; + gint count = 0; + guchar val; + gint length; + gint j; + + while (size > 0) + { + if (xcfdata > xcfdatalimit) + { + goto bogus_rle; + } + + val = *xcfdata++; + + length = val; + if (length >= 128) + { + length = 255 - (length - 1); + if (length == 128) + { + if (xcfdata >= xcfdatalimit) + { + goto bogus_rle; + } + + length = (*xcfdata << 8) + xcfdata[1]; + xcfdata += 2; + } + + count += length; + size -= length; + + if (size < 0) + { + goto bogus_rle; + } + + if (&xcfdata[length-1] > xcfdatalimit) + { + goto bogus_rle; + } + + while (length-- > 0) + { + *data = *xcfdata++; + nonzero |= *data; + data += bpp; + } + } + else + { + length += 1; + if (length == 128) + { + if (xcfdata >= xcfdatalimit) + { + goto bogus_rle; + } + + length = (*xcfdata << 8) + xcfdata[1]; + xcfdata += 2; + } + + count += length; + size -= length; + + if (size < 0) + { + goto bogus_rle; + } + + if (xcfdata > xcfdatalimit) + { + goto bogus_rle; + } + + val = *xcfdata++; + nonzero |= val; + + for (j = 0; j < length; j++) + { + *data = val; + data += bpp; + } + } + } + } + + if (nonzero) + { + if (info->file_version >= 12) + { + gint n_components = babl_format_get_n_components (format); + + xcf_read_from_be (bpp / n_components, tile_data, + tile_size / bpp * n_components); + } + + gegl_buffer_set (buffer, tile_rect, 0, format, tile_data, + GEGL_AUTO_ROWSTRIDE); + } + + return TRUE; + + bogus_rle: + return FALSE; +} + +static gboolean +xcf_load_tile_zlib (XcfInfo *info, + GeglBuffer *buffer, + GeglRectangle *tile_rect, + const Babl *format, + gint data_length) +{ + z_stream strm; + int action; + int status; + gint bpp = babl_format_get_bytes_per_pixel (format); + gint tile_size = bpp * tile_rect->width * tile_rect->height; + guchar *tile_data = g_alloca (tile_size); + gsize bytes_read; + guchar *xcfdata; + + /* Workaround for bug #357809: avoid crashing on g_malloc() and skip + * this tile (return TRUE without storing data) as if it did not + * contain any data. It is better than returning FALSE, which would + * skip the whole hierarchy while there may still be some valid + * tiles in the file. + */ + if (data_length <= 0) + return TRUE; + + xcfdata = g_alloca (data_length); + + /* we have to read directly instead of xcf_read_* because we may be + * reading past the end of the file here + */ + g_input_stream_read_all (info->input, xcfdata, data_length, + &bytes_read, NULL, NULL); + info->cp += bytes_read; + + if (bytes_read == 0) + return TRUE; + + strm.next_out = tile_data; + strm.avail_out = tile_size; + + strm.zalloc = Z_NULL; + strm.zfree = Z_NULL; + strm.opaque = Z_NULL; + strm.next_in = xcfdata; + strm.avail_in = bytes_read; + + /* Initialize the stream decompression. */ + status = inflateInit (&strm); + if (status != Z_OK) + return FALSE; + + action = Z_NO_FLUSH; + + while (status == Z_OK) + { + if (strm.avail_in == 0) + { + action = Z_FINISH; + } + + status = inflate (&strm, action); + + if (status == Z_STREAM_END) + { + /* All the data was successfully decoded. */ + break; + } + else if (status == Z_BUF_ERROR) + { + g_printerr ("xcf: decompressed tile bigger than the expected size."); + inflateEnd (&strm); + return FALSE; + } + else if (status != Z_OK) + { + g_printerr ("xcf: tile decompression failed: %s", zError (status)); + inflateEnd (&strm); + return FALSE; + } + } + + if (! xcf_data_is_zero (tile_data, tile_size)) + { + if (info->file_version >= 12) + { + gint n_components = babl_format_get_n_components (format); + + xcf_read_from_be (bpp / n_components, tile_data, + tile_size / bpp * n_components); + } + + gegl_buffer_set (buffer, tile_rect, 0, format, tile_data, + GEGL_AUTO_ROWSTRIDE); + } + + inflateEnd (&strm); + + return TRUE; +} + +static GimpParasite * +xcf_load_parasite (XcfInfo *info) +{ + GimpParasite *parasite; + gchar *name; + guint32 flags; + guint32 size; + gpointer data; + + xcf_read_string (info, &name, 1); + xcf_read_int32 (info, &flags, 1); + xcf_read_int32 (info, &size, 1); + + if (size > MAX_XCF_PARASITE_DATA_LEN) + { + g_printerr ("Maximum parasite data length (%ld bytes) exceeded. " + "Possibly corrupt XCF file.", MAX_XCF_PARASITE_DATA_LEN); + g_free (name); + return NULL; + } + + data = g_new (gchar, size); + xcf_read_int8 (info, data, size); + + parasite = gimp_parasite_new (name, flags, size, data); + + g_free (name); + g_free (data); + + return parasite; +} + +static gboolean +xcf_load_old_paths (XcfInfo *info, + GimpImage *image) +{ + guint32 num_paths; + guint32 last_selected_row; + GimpVectors *active_vectors; + + xcf_read_int32 (info, &last_selected_row, 1); + xcf_read_int32 (info, &num_paths, 1); + + while (num_paths-- > 0) + xcf_load_old_path (info, image); + + active_vectors = + GIMP_VECTORS (gimp_container_get_child_by_index (gimp_image_get_vectors (image), + last_selected_row)); + + if (active_vectors) + gimp_image_set_active_vectors (image, active_vectors); + + return TRUE; +} + +static gboolean +xcf_load_old_path (XcfInfo *info, + GimpImage *image) +{ + gchar *name; + guint32 locked; + guint8 state; + guint32 closed; + guint32 num_points; + guint32 version; /* changed from num_paths */ + GimpTattoo tattoo = 0; + GimpVectors *vectors; + GimpVectorsCompatPoint *points; + gint i; + + xcf_read_string (info, &name, 1); + xcf_read_int32 (info, &locked, 1); + xcf_read_int8 (info, &state, 1); + xcf_read_int32 (info, &closed, 1); + xcf_read_int32 (info, &num_points, 1); + xcf_read_int32 (info, &version, 1); + + if (version == 2) + { + guint32 dummy; + + /* Had extra type field and points are stored as doubles */ + xcf_read_int32 (info, (guint32 *) &dummy, 1); + } + else if (version == 3) + { + guint32 dummy; + + /* Has extra tattoo field */ + xcf_read_int32 (info, (guint32 *) &dummy, 1); + xcf_read_int32 (info, (guint32 *) &tattoo, 1); + } + else if (version != 1) + { + g_printerr ("Unknown path type. Possibly corrupt XCF file"); + + return FALSE; + } + + /* skip empty compatibility paths */ + if (num_points == 0) + { + g_free (name); + return FALSE; + } + + points = g_new0 (GimpVectorsCompatPoint, num_points); + + for (i = 0; i < num_points; i++) + { + if (version == 1) + { + gint32 x; + gint32 y; + + xcf_read_int32 (info, &points[i].type, 1); + xcf_read_int32 (info, (guint32 *) &x, 1); + xcf_read_int32 (info, (guint32 *) &y, 1); + + points[i].x = x; + points[i].y = y; + } + else + { + gfloat x; + gfloat y; + + xcf_read_int32 (info, &points[i].type, 1); + xcf_read_float (info, &x, 1); + xcf_read_float (info, &y, 1); + + points[i].x = x; + points[i].y = y; + } + } + + vectors = gimp_vectors_compat_new (image, name, points, num_points, closed); + + g_free (name); + g_free (points); + + gimp_item_set_linked (GIMP_ITEM (vectors), locked, FALSE); + + if (tattoo) + gimp_item_set_tattoo (GIMP_ITEM (vectors), tattoo); + + gimp_image_add_vectors (image, vectors, + NULL, /* can't be a tree */ + gimp_container_get_n_children (gimp_image_get_vectors (image)), + FALSE); + + return TRUE; +} + +static gboolean +xcf_load_vectors (XcfInfo *info, + GimpImage *image) +{ + guint32 version; + guint32 active_index; + guint32 num_paths; + GimpVectors *active_vectors; + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("xcf_load_vectors\n"); +#endif + + xcf_read_int32 (info, &version, 1); + + if (version != 1) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Unknown vectors version: %d (skipping)", version); + return FALSE; + } + + xcf_read_int32 (info, &active_index, 1); + xcf_read_int32 (info, &num_paths, 1); + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("%d paths (active: %d)\n", num_paths, active_index); +#endif + + while (num_paths-- > 0) + if (! xcf_load_vector (info, image)) + return FALSE; + + /* FIXME tree */ + active_vectors = + GIMP_VECTORS (gimp_container_get_child_by_index (gimp_image_get_vectors (image), + active_index)); + + if (active_vectors) + gimp_image_set_active_vectors (image, active_vectors); + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("xcf_load_vectors: loaded %d bytes\n", info->cp - base); +#endif + return TRUE; +} + +static gboolean +xcf_load_vector (XcfInfo *info, + GimpImage *image) +{ + gchar *name; + GimpTattoo tattoo = 0; + guint32 visible; + guint32 linked; + guint32 num_parasites; + guint32 num_strokes; + GimpVectors *vectors; + gint i; + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("xcf_load_vector\n"); +#endif + + xcf_read_string (info, &name, 1); + xcf_read_int32 (info, &tattoo, 1); + xcf_read_int32 (info, &visible, 1); + xcf_read_int32 (info, &linked, 1); + xcf_read_int32 (info, &num_parasites, 1); + xcf_read_int32 (info, &num_strokes, 1); + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("name: %s, tattoo: %d, visible: %d, linked: %d, " + "num_parasites %d, num_strokes %d\n", + name, tattoo, visible, linked, num_parasites, num_strokes); +#endif + + vectors = gimp_vectors_new (image, name); + g_free (name); + + gimp_item_set_visible (GIMP_ITEM (vectors), visible, FALSE); + gimp_item_set_linked (GIMP_ITEM (vectors), linked, FALSE); + + if (tattoo) + gimp_item_set_tattoo (GIMP_ITEM (vectors), tattoo); + + for (i = 0; i < num_parasites; i++) + { + GimpParasite *parasite = xcf_load_parasite (info); + GError *error = NULL; + + if (! parasite) + return FALSE; + + if (! gimp_item_parasite_validate (GIMP_ITEM (vectors), parasite, &error)) + { + gimp_message (info->gimp, G_OBJECT (info->progress), + GIMP_MESSAGE_WARNING, + "Warning, invalid vectors parasite in XCF file: %s", + error->message); + g_clear_error (&error); + } + else + { + gimp_item_parasite_attach (GIMP_ITEM (vectors), parasite, FALSE); + } + + gimp_parasite_free (parasite); + } + + for (i = 0; i < num_strokes; i++) + { + guint32 stroke_type_id; + guint32 closed; + guint32 num_axes; + guint32 num_control_points; + guint32 type; + gfloat coords[10] = GIMP_COORDS_DEFAULT_VALUES; + GimpStroke *stroke; + gint j; + + GimpValueArray *control_points; + GValue value = G_VALUE_INIT; + GimpAnchor anchor = { { 0, } }; + GType stroke_type; + + g_value_init (&value, GIMP_TYPE_ANCHOR); + + xcf_read_int32 (info, &stroke_type_id, 1); + xcf_read_int32 (info, &closed, 1); + xcf_read_int32 (info, &num_axes, 1); + xcf_read_int32 (info, &num_control_points, 1); + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("stroke_type: %d, closed: %d, num_axes %d, len %d\n", + stroke_type_id, closed, num_axes, num_control_points); +#endif + + switch (stroke_type_id) + { + case XCF_STROKETYPE_BEZIER_STROKE: + stroke_type = GIMP_TYPE_BEZIER_STROKE; + break; + + default: + g_printerr ("skipping unknown stroke type\n"); + xcf_seek_pos (info, + info->cp + 4 * num_axes * num_control_points, + NULL); + continue; + } + + if (num_axes < 2 || num_axes > 6) + { + g_printerr ("bad number of axes in stroke description\n"); + return FALSE; + } + + control_points = gimp_value_array_new (num_control_points); + + anchor.selected = FALSE; + + for (j = 0; j < num_control_points; j++) + { + xcf_read_int32 (info, &type, 1); + xcf_read_float (info, coords, num_axes); + + anchor.type = type; + anchor.position.x = coords[0]; + anchor.position.y = coords[1]; + anchor.position.pressure = coords[2]; + anchor.position.xtilt = coords[3]; + anchor.position.ytilt = coords[4]; + anchor.position.wheel = coords[5]; + + g_value_set_boxed (&value, &anchor); + gimp_value_array_append (control_points, &value); + +#ifdef GIMP_XCF_PATH_DEBUG + g_printerr ("Anchor: %d, (%f, %f, %f, %f, %f, %f)\n", type, + coords[0], coords[1], coords[2], coords[3], + coords[4], coords[5]); +#endif + } + + g_value_unset (&value); + + stroke = g_object_new (stroke_type, + "closed", closed, + "control-points", control_points, + NULL); + + gimp_vectors_stroke_add (vectors, stroke); + + g_object_unref (stroke); + gimp_value_array_unref (control_points); + } + + gimp_image_add_vectors (image, vectors, + NULL, /* FIXME tree */ + gimp_container_get_n_children (gimp_image_get_vectors (image)), + FALSE); + + return TRUE; +} + +static gboolean +xcf_skip_unknown_prop (XcfInfo *info, + gsize size) +{ + guint8 buf[16]; + guint amount; + + while (size > 0) + { + if (g_input_stream_is_closed (info->input)) + return FALSE; + + amount = MIN (16, size); + amount = xcf_read_int8 (info, buf, amount); + if (amount == 0) + return FALSE; + + size -= amount; + } + + return TRUE; +} + +static gboolean +xcf_item_path_is_parent (GList *path, + GList *parent_path) +{ + GList *iter = path; + GList *parent_iter = parent_path; + + if (g_list_length (parent_path) >= g_list_length (path)) + return FALSE; + + while (iter && parent_iter) + { + if (iter->data != parent_iter->data) + return FALSE; + + iter = iter->next; + parent_iter = parent_iter->next; + } + + return TRUE; +} + +static void +xcf_fix_item_path (GimpLayer *layer, + GList **path, + GList *broken_paths) +{ + GList *iter; + + for (iter = broken_paths; iter; iter = iter->next) + { + if (xcf_item_path_is_parent (*path, iter->data)) + { + /* Not much to do when the absent path is a parent. */ + g_printerr ("%s: layer '%s' moved to layer tree root because of missing parent.", + G_STRFUNC, gimp_object_get_name (layer)); + g_clear_pointer (path, g_list_free); + return; + } + } + + /* Check if a parent of path, or path itself is on the same + * tree level as any broken path; and if so, and if the broken path is + * in a lower position in the item group, decrement it. + */ + for (iter = broken_paths; iter; iter = iter->next) + { + GList *broken_path = iter->data; + GList *iter1 = *path; + GList *iter2 = broken_path; + + if (g_list_length (broken_path) > g_list_length (*path)) + continue; + + while (iter1 && iter2) + { + if (iter2->next && iter1->data != iter2->data) + /* Paths diverged before reaching iter2 leaf. */ + break; + + if (iter2->next) + { + iter1 = iter1->next; + iter2 = iter2->next; + continue; + } + + if (GPOINTER_TO_UINT (iter2->data) < GPOINTER_TO_UINT (iter1->data)) + iter1->data = GUINT_TO_POINTER (GPOINTER_TO_UINT (iter1->data) - 1); + + break; + } + } +} |