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gimp/app/xcf/xcf-load.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.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-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-undo.h"
#include "core/gimpitemstack.h"
#include "core/gimplayer-floating-sel.h"
#include "core/gimplayermask.h"
#include "core/gimpparasitelist.h"
#include "core/gimpprogress.h"
#include "core/gimpselection.h"
#include "core/gimptemplate.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 "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_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 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);
#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;
guint32 saved_pos;
guint32 offset;
gint width;
gint height;
gint image_type;
GimpPrecision precision = GIMP_PRECISION_U8_GAMMA;
gint num_successful_elements = 0;
/* read in the image width, height and type */
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
info->cp += xcf_read_int32 (info->input, (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;
info->cp += xcf_read_int32 (info->input, (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);
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;
const gchar *meta_string;
meta_string = (gchar *) gimp_parasite_data (parasite);
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));
}
/* 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);
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
{
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,
gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite),
&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));
}
xcf_progress_update (info);
while (TRUE)
{
GimpLayer *layer;
GList *item_path = NULL;
/* read in the offset of the next layer */
info->cp += xcf_read_int32 (info->input, &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)
goto error;
num_successful_elements++;
xcf_progress_update (info);
/* 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;
}
while (TRUE)
{
GimpChannel *channel;
/* read in the offset of the next channel */
info->cp += xcf_read_int32 (info->input, &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)
goto error;
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;
}
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);
gimp_image_set_filename (image, info->filename);
if (info->tattoo_state > 0)
gimp_image_set_tattoo_state (image, info->tattoo_state);
gimp_image_undo_enable (image);
return image;
error:
if (num_successful_elements == 0)
goto hard_error;
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_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."));
if (image)
g_object_unref (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];
info->cp += xcf_read_int32 (info->input, &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
{
info->cp += xcf_read_int8 (info->input, 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;
info->cp += xcf_read_int8 (info->input, (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_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++)
{
info->cp += xcf_read_int32 (info->input,
(guint32 *) &position, 1);
info->cp += xcf_read_int8 (info->input,
(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:
{
gint32 x, y;
gint i, n_sample_points;
n_sample_points = prop_size / (4 + 4);
for (i = 0; i < n_sample_points; i++)
{
info->cp += xcf_read_int32 (info->input, (guint32 *) &x, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &y, 1);
GIMP_LOG (XCF, "prop 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;
info->cp += xcf_read_float (info->input, &xres, 1);
info->cp += xcf_read_float (info->input, &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:
{
info->cp += xcf_read_int32 (info->input, &info->tattoo_state, 1);
GIMP_LOG (XCF, "prop tattoo state=%d", info->tattoo_state);
}
break;
case PROP_PARASITES:
{
glong 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);
}
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;
info->cp += xcf_read_int32 (info->input, &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;
info->cp += xcf_read_float (info->input, &factor, 1);
info->cp += xcf_read_int32 (info->input, &digits, 1);
info->cp += xcf_read_string (info->input, 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:
{
guint32 base = info->cp;
if (xcf_load_vectors (info, image))
{
if (base + prop_size != info->cp)
{
g_printerr ("Mismatch in PROP_VECTORS size: "
"skipping %d 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;
info->cp +=
xcf_read_int32 (info->input,
(guint32 *) &info->floating_sel_offset, 1);
break;
case PROP_OPACITY:
{
guint32 opacity;
info->cp += xcf_read_int32 (info->input, &opacity, 1);
gimp_layer_set_opacity (*layer, (gdouble) opacity / 255.0, FALSE);
}
break;
case PROP_VISIBLE:
{
gboolean visible;
info->cp += xcf_read_int32 (info->input, (guint32 *) &visible, 1);
gimp_item_set_visible (GIMP_ITEM (*layer), visible, FALSE);
}
break;
case PROP_LINKED:
{
gboolean linked;
info->cp += xcf_read_int32 (info->input, (guint32 *) &linked, 1);
gimp_item_set_linked (GIMP_ITEM (*layer), linked, FALSE);
}
break;
case PROP_LOCK_CONTENT:
{
gboolean lock_content;
info->cp += xcf_read_int32 (info->input, (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;
info->cp += xcf_read_int32 (info->input, (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;
info->cp += xcf_read_int32 (info->input, (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:
info->cp += xcf_read_int32 (info->input, (guint32 *) apply_mask, 1);
break;
case PROP_EDIT_MASK:
info->cp += xcf_read_int32 (info->input, (guint32 *) edit_mask, 1);
break;
case PROP_SHOW_MASK:
info->cp += xcf_read_int32 (info->input, (guint32 *) show_mask, 1);
break;
case PROP_OFFSETS:
{
guint32 offset_x;
guint32 offset_y;
info->cp += xcf_read_int32 (info->input, &offset_x, 1);
info->cp += xcf_read_int32 (info->input, &offset_y, 1);
gimp_item_set_offset (GIMP_ITEM (*layer), offset_x, offset_y);
}
break;
case PROP_MODE:
{
guint32 mode;
info->cp += xcf_read_int32 (info->input, &mode, 1);
gimp_layer_set_mode (*layer, (GimpLayerModeEffects) mode, FALSE);
}
break;
case PROP_TATTOO:
{
GimpTattoo tattoo;
info->cp += xcf_read_int32 (info->input, (guint32 *) &tattoo, 1);
gimp_item_set_tattoo (GIMP_ITEM (*layer), tattoo);
}
break;
case PROP_PARASITES:
{
glong 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:
info->cp += xcf_read_int32 (info->input, text_layer_flags, 1);
break;
case PROP_GROUP_ITEM:
{
GimpLayer *group;
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;
}
break;
case PROP_ITEM_PATH:
{
glong base = info->cp;
GList *path = NULL;
while (info->cp - base < prop_size)
{
guint32 index;
if (xcf_read_int32 (info->input, &index, 1) != 4)
{
g_list_free (path);
return FALSE;
}
info->cp += 4;
path = g_list_append (path, GUINT_TO_POINTER (index));
}
*item_path = path;
}
break;
case PROP_GROUP_ITEM_FLAGS:
info->cp += xcf_read_int32 (info->input, 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_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;
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);
g_object_unref (GIMP_DRAWABLE (mask)->private->buffer);
GIMP_DRAWABLE (mask)->private->buffer =
GIMP_DRAWABLE (*channel)->private->buffer;
GIMP_DRAWABLE (*channel)->private->buffer = NULL;
g_object_unref (*channel);
*channel = mask;
(*channel)->boundary_known = FALSE;
(*channel)->bounds_known = FALSE;
}
break;
case PROP_OPACITY:
{
guint32 opacity;
info->cp += xcf_read_int32 (info->input, &opacity, 1);
gimp_channel_set_opacity (*channel, opacity / 255.0, FALSE);
}
break;
case PROP_VISIBLE:
{
gboolean visible;
info->cp += xcf_read_int32 (info->input, (guint32 *) &visible, 1);
gimp_item_set_visible (GIMP_ITEM (*channel),
visible ? TRUE : FALSE, FALSE);
}
break;
case PROP_LINKED:
{
gboolean linked;
info->cp += xcf_read_int32 (info->input, (guint32 *) &linked, 1);
gimp_item_set_linked (GIMP_ITEM (*channel),
linked ? TRUE : FALSE, FALSE);
}
break;
case PROP_LOCK_CONTENT:
{
gboolean lock_content;
info->cp += xcf_read_int32 (info->input, (guint32 *) &lock_content, 1);
gimp_item_set_lock_content (GIMP_ITEM (*channel),
lock_content ? TRUE : FALSE, FALSE);
}
break;
case PROP_LOCK_POSITION:
{
gboolean lock_position;
info->cp += xcf_read_int32 (info->input, (guint32 *) &lock_position, 1);
gimp_item_set_lock_position (GIMP_ITEM (*channel),
lock_position ? TRUE : FALSE, FALSE);
}
break;
case PROP_SHOW_MASKED:
{
gboolean show_masked;
info->cp += xcf_read_int32 (info->input, (guint32 *) &show_masked, 1);
gimp_channel_set_show_masked (*channel, show_masked);
}
break;
case PROP_COLOR:
{
guchar col[3];
info->cp += xcf_read_int8 (info->input, (guint8 *) col, 3);
gimp_rgb_set_uchar (&(*channel)->color, col[0], col[1], col[2]);
}
break;
case PROP_TATTOO:
{
GimpTattoo tattoo;
info->cp += xcf_read_int32 (info->input, (guint32 *) &tattoo, 1);
gimp_item_set_tattoo (GIMP_ITEM (*channel), tattoo);
}
break;
case PROP_PARASITES:
{
glong 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->input, (guint32 *) prop_type, 1) != 4))
return FALSE;
info->cp += 4;
if (G_UNLIKELY (xcf_read_int32 (info->input, (guint32 *) prop_size, 1) != 4))
return FALSE;
info->cp += 4;
return TRUE;
}
static GimpLayer *
xcf_load_layer (XcfInfo *info,
GimpImage *image,
GList **item_path)
{
GimpLayer *layer;
GimpLayerMask *layer_mask;
guint32 hierarchy_offset;
guint32 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 */
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &type, 1);
info->cp += xcf_read_string (info->input, &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)
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, 255, GIMP_NORMAL_MODE);
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 */
info->cp += xcf_read_int32 (info->input, &hierarchy_offset, 1);
info->cp += xcf_read_int32 (info->input, &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:
g_object_unref (layer);
return NULL;
}
static GimpChannel *
xcf_load_channel (XcfInfo *info,
GimpImage *image)
{
GimpChannel *channel;
guint32 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 */
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
if (width <= 0 || height <= 0)
return NULL;
info->cp += xcf_read_string (info->input, &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 */
info->cp += xcf_read_int32 (info->input, &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:
g_object_unref (channel);
return NULL;
}
static GimpLayerMask *
xcf_load_layer_mask (XcfInfo *info,
GimpImage *image)
{
GimpLayerMask *layer_mask;
GimpChannel *channel;
guint32 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 */
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
if (width <= 0 || height <= 0)
return NULL;
info->cp += xcf_read_string (info->input, &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 */
info->cp += xcf_read_int32 (info->input, &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:
g_object_unref (layer_mask);
return NULL;
}
static gboolean
xcf_load_buffer (XcfInfo *info,
GeglBuffer *buffer)
{
const Babl *format;
guint32 offset;
gint width;
gint height;
gint bpp;
format = gegl_buffer_get_format (buffer);
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &bpp, 1);
/* make sure the values in the file correspond to the values
* calculated when the TileManager 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;
info->cp += xcf_read_int32 (info->input, &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;
guint32 saved_pos;
guint32 offset, offset2;
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);
info->cp += xcf_read_int32 (info->input, (guint32 *) &width, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &height, 1);
if (width != gegl_buffer_get_width (buffer) ||
height != gegl_buffer_get_height (buffer))
return FALSE;
/* read in the first tile offset.
* if it is '0', then this tile level is empty
* and we can simply return.
*/
info->cp += xcf_read_int32 (info->input, &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*/
info->cp += xcf_read_int32 (info->input, &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 + XCF_TILE_WIDTH * XCF_TILE_WIDTH * bpp * 1.5;
/* 1.5 is probably more
than we need to allow */
/* seek to the tile offset */
if (! xcf_seek_pos (info, offset, NULL))
return FALSE;
/* get the tile from the tile manager */
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:
g_warning ("xcf: zlib compression unimplemented");
fail = TRUE;
break;
case COMPRESS_FRACTAL:
g_warning ("xcf: fractal compression unimplemented");
fail = TRUE;
break;
default:
g_warning ("xcf: unknown compression");
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 */
info->cp += xcf_read_int32 (info->input, &offset, 1);
}
if (offset != 0)
{
gimp_message (info->gimp, G_OBJECT (info->progress), GIMP_MESSAGE_ERROR,
"encountered garbage after reading level: %d", 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);
info->cp += xcf_read_int8 (info->input, 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);
gint i;
gsize nmemb_read_successfully;
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,
&nmemb_read_successfully, NULL, NULL);
if (nmemb_read_successfully == 0)
return TRUE;
info->cp += nmemb_read_successfully;
xcfdatalimit = &xcfodata[nmemb_read_successfully - 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++;
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++;
for (j = 0; j < length; j++)
{
*data = val;
data += bpp;
}
}
}
}
gegl_buffer_set (buffer, tile_rect, 0, format, tile_data,
GEGL_AUTO_ROWSTRIDE);
return TRUE;
bogus_rle:
return FALSE;
}
static GimpParasite *
xcf_load_parasite (XcfInfo *info)
{
GimpParasite *parasite;
gchar *name;
guint32 flags;
guint32 size;
gpointer data;
info->cp += xcf_read_string (info->input, &name, 1);
info->cp += xcf_read_int32 (info->input, &flags, 1);
info->cp += xcf_read_int32 (info->input, &size, 1);
if (size > MAX_XCF_PARASITE_DATA_LEN)
{
g_warning ("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);
info->cp += xcf_read_int8 (info->input, 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;
info->cp += xcf_read_int32 (info->input, &last_selected_row, 1);
info->cp += xcf_read_int32 (info->input, &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;
info->cp += xcf_read_string (info->input, &name, 1);
info->cp += xcf_read_int32 (info->input, &locked, 1);
info->cp += xcf_read_int8 (info->input, &state, 1);
info->cp += xcf_read_int32 (info->input, &closed, 1);
info->cp += xcf_read_int32 (info->input, &num_points, 1);
info->cp += xcf_read_int32 (info->input, &version, 1);
if (version == 2)
{
guint32 dummy;
/* Had extra type field and points are stored as doubles */
info->cp += xcf_read_int32 (info->input, (guint32 *) &dummy, 1);
}
else if (version == 3)
{
guint32 dummy;
/* Has extra tatto field */
info->cp += xcf_read_int32 (info->input, (guint32 *) &dummy, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &tattoo, 1);
}
else if (version != 1)
{
g_warning ("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;
info->cp += xcf_read_int32 (info->input, &points[i].type, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &x, 1);
info->cp += xcf_read_int32 (info->input, (guint32 *) &y, 1);
points[i].x = x;
points[i].y = y;
}
else
{
gfloat x;
gfloat y;
info->cp += xcf_read_int32 (info->input, &points[i].type, 1);
info->cp += xcf_read_float (info->input, &x, 1);
info->cp += xcf_read_float (info->input, &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
info->cp += xcf_read_int32 (info->input, &version, 1);
if (version != 1)
{
gimp_message (info->gimp, G_OBJECT (info->progress),
GIMP_MESSAGE_WARNING,
"Unknown vectors version: %d (skipping)", version);
return FALSE;
}
info->cp += xcf_read_int32 (info->input, &active_index, 1);
info->cp += xcf_read_int32 (info->input, &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
info->cp += xcf_read_string (info->input, &name, 1);
info->cp += xcf_read_int32 (info->input, &tattoo, 1);
info->cp += xcf_read_int32 (info->input, &visible, 1);
info->cp += xcf_read_int32 (info->input, &linked, 1);
info->cp += xcf_read_int32 (info->input, &num_parasites, 1);
info->cp += xcf_read_int32 (info->input, &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[8] = GIMP_COORDS_DEFAULT_VALUES;
GimpStroke *stroke;
gint j;
GimpValueArray *control_points;
GValue value = { 0, };
GimpAnchor anchor = { { 0, } };
GType stroke_type;
g_value_init (&value, GIMP_TYPE_ANCHOR);
info->cp += xcf_read_int32 (info->input, &stroke_type_id, 1);
info->cp += xcf_read_int32 (info->input, &closed, 1);
info->cp += xcf_read_int32 (info->input, &num_axes, 1);
info->cp += xcf_read_int32 (info->input, &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++)
{
info->cp += xcf_read_int32 (info->input, &type, 1);
info->cp += xcf_read_float (info->input, 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->input, buf, amount);
if (amount == 0)
return FALSE;
info->cp += amount;
size -= amount;
}
return TRUE;
}
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