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gimp/plug-ins/common/file-wmf.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 <https://www.gnu.org/licenses/>.
*/
/* WMF loading file filter for GIMP
* -Dom Lachowicz <cinamod@hotmail.com> 2003
* -Francis James Franklin <fjf@alinameridon.com>
*/
#include "config.h"
#include <libwmf/api.h>
#include <libwmf/gd.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <libgimpmath/gimpmath.h>
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-wmf-load"
#define LOAD_THUMB_PROC "file-wmf-load-thumb"
#define PLUG_IN_BINARY "file-wmf"
#define PLUG_IN_ROLE "gimp-file-wmf"
#define WMF_DEFAULT_RESOLUTION 300.0
#define WMF_DEFAULT_SIZE 500.0
#define WMF_PREVIEW_SIZE 128
typedef struct
{
gdouble resolution;
gint width;
gint height;
} WmfLoadVals;
typedef struct _Wmf Wmf;
typedef struct _WmfClass WmfClass;
struct _Wmf
{
GimpPlugIn parent_instance;
};
struct _WmfClass
{
GimpPlugInClass parent_class;
};
typedef struct
{
guchar *pixels;
gint width;
gint height;
} WmfPixbuf;
#define WMF_TYPE (wmf_get_type ())
#define WMF(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), WMF_TYPE, Wmf))
GType wmf_get_type (void) G_GNUC_CONST;
static GList * wmf_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * wmf_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static gboolean wmf_extract (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
GimpVectorLoadData *extracted_dimensions,
gpointer *data_for_run,
GDestroyNotify *data_for_run_destroy,
gpointer extract_data,
GError **error);
static GimpValueArray * wmf_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
gint width,
gint height,
GimpVectorLoadData extracted_data,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer data_from_extract,
gpointer run_data);
static GimpValueArray * wmf_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
GimpProcedureConfig *config,
gpointer run_data);
static GimpImage * load_image (GFile *file,
gint requested_width,
gint requested_height,
gdouble resolution,
GError **error);
static gboolean load_wmf_size (GFile *file,
float *width,
float *height,
gboolean *guessed);
static gboolean load_dialog (GFile *file,
GimpVectorLoadData extracted_data,
GimpProcedure *procedure,
GimpProcedureConfig *config);
static guchar * wmf_load_file (GFile *file,
gint requested_width,
gint requested_height,
gdouble resolution,
guint *width,
guint *height,
GError **error);
G_DEFINE_TYPE (Wmf, wmf, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (WMF_TYPE)
DEFINE_STD_SET_I18N
static void
wmf_class_init (WmfClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = wmf_query_procedures;
plug_in_class->create_procedure = wmf_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
wmf_init (Wmf *wmf)
{
}
static GList *
wmf_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_THUMB_PROC));
list = g_list_append (list, g_strdup (LOAD_PROC));
return list;
}
static GimpProcedure *
wmf_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = gimp_vector_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
wmf_extract, NULL, NULL,
wmf_load, NULL, NULL);
gimp_procedure_set_menu_label (procedure, _("Microsoft WMF file"));
gimp_procedure_set_documentation (procedure,
"Loads files in the WMF file format",
"Loads files in the WMF file format",
name);
gimp_procedure_set_attribution (procedure,
"Dom Lachowicz <cinamod@hotmail.com>",
"Dom Lachowicz <cinamod@hotmail.com>",
"(c) 2003 - Version 0.3.0");
gimp_file_procedure_set_format_name (GIMP_FILE_PROCEDURE (procedure),
_("WMF"));
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/x-wmf");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"wmf,apm");
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
"0,string,\\327\\315\\306\\232,0,string,\\1\\0\\11\\0");
gimp_load_procedure_set_thumbnail_loader (GIMP_LOAD_PROCEDURE (procedure),
LOAD_THUMB_PROC);
}
else if (! strcmp (name, LOAD_THUMB_PROC))
{
procedure = gimp_thumbnail_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
wmf_load_thumb, NULL, NULL);
gimp_procedure_set_documentation (procedure,
"Loads a small preview from a WMF image",
"",
name);
gimp_procedure_set_attribution (procedure,
"Dom Lachowicz <cinamod@hotmail.com>",
"Dom Lachowicz <cinamod@hotmail.com>",
"(c) 2003 - Version 0.3.0");
}
return procedure;
}
static gboolean
wmf_extract (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
GimpVectorLoadData *extracted_dimensions,
gpointer *data_for_run,
GDestroyNotify *data_for_run_destroy,
gpointer extract_data,
GError **error)
{
float width = 0;
float height = 0;
gboolean guessed = FALSE;
if (! load_wmf_size (file, &width, &height, &guessed))
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not open '%s' for reading"),
gimp_file_get_utf8_name (file));
return FALSE;
}
extracted_dimensions->width = width;
extracted_dimensions->width_unit = gimp_unit_percent ();
extracted_dimensions->exact_width = guessed ? FALSE : TRUE;
extracted_dimensions->height = height;
extracted_dimensions->height_unit = gimp_unit_percent ();
extracted_dimensions->exact_height = guessed ? FALSE : TRUE;
extracted_dimensions->correct_ratio = guessed ? FALSE : TRUE;
return TRUE;
}
static GimpValueArray *
wmf_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
gint width,
gint height,
GimpVectorLoadData extracted_data,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer data_from_extract,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
GError *error = NULL;
gdouble resolution;
gegl_init (NULL, NULL);
if (run_mode == GIMP_RUN_INTERACTIVE && ! load_dialog (file, extracted_data, procedure, config))
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
g_object_get (config,
"pixel-density", &resolution,
"width", &width,
"height", &height,
NULL);
image = load_image (file, width, height, resolution, &error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
wmf_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
float width = 0;
float height = 0;
GError *error = NULL;
gegl_init (NULL, NULL);
if (load_wmf_size (file, &width, &height, NULL) &&
width > 0 && height > 0)
{
if (width > height)
{
height *= (size / width);
width = (float) size;
}
else
{
width *= size / height;
height = (float) size;
}
}
else
{
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
NULL);
}
image = load_image (file, width, height, WMF_DEFAULT_RESOLUTION, &error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
GIMP_VALUES_SET_INT (return_vals, 2, width);
GIMP_VALUES_SET_INT (return_vals, 3, height);
gimp_value_array_truncate (return_vals, 4);
return return_vals;
}
/* This function retrieves the pixel size from a WMF file. */
static gboolean
load_wmf_size (GFile *file,
float *width,
float *height,
gboolean *guessed)
{
GMappedFile *mapped;
/* the bits we need to decode the WMF via libwmf2's GD layer */
wmf_error_t err;
gulong flags;
wmf_gd_t *ddata = NULL;
wmfAPI *API = NULL;
wmfAPI_Options api_options;
wmfD_Rect bbox;
gboolean success = TRUE;
char* wmffontdirs[2] = { NULL, NULL };
mapped = g_mapped_file_new (g_file_peek_path (file), FALSE, NULL);
if (! mapped)
return FALSE;
flags = WMF_OPT_IGNORE_NONFATAL | WMF_OPT_FUNCTION;
api_options.function = wmf_gd_function;
#ifdef ENABLE_RELOCATABLE_RESOURCES
wmffontdirs[0] = g_build_filename (gimp_installation_directory (),
"share/libwmf/fonts", NULL);
flags |= WMF_OPT_FONTDIRS;
api_options.fontdirs = wmffontdirs;
#endif
err = wmf_api_create (&API, flags, &api_options);
if (wmffontdirs[0])
g_free (wmffontdirs[0]);
if (err != wmf_E_None)
success = FALSE;
ddata = WMF_GD_GetData (API);
ddata->type = wmf_gd_image;
err = wmf_mem_open (API,
(guchar *) g_mapped_file_get_contents (mapped),
g_mapped_file_get_length (mapped));
if (err != wmf_E_None)
success = FALSE;
err = wmf_scan (API, 0, &bbox);
if (err != wmf_E_None)
success = FALSE;
err = wmf_size (API, width, height);
if (err != wmf_E_None || *width <= 0.0f || *height <= 0.0f)
success = FALSE;
wmf_mem_close (API);
g_mapped_file_unref (mapped);
if (*width <= 0.0f || *height <= 0.0f)
{
*width = WMF_DEFAULT_SIZE;
*height = WMF_DEFAULT_SIZE;
if (guessed)
*guessed = TRUE;
}
return success;
}
/* User interface */
static gboolean
load_dialog (GFile *file,
GimpVectorLoadData extracted_data,
GimpProcedure *procedure,
GimpProcedureConfig *config)
{
GtkWidget *dialog;
gboolean run = FALSE;
gimp_ui_init (PLUG_IN_BINARY);
dialog = gimp_vector_load_procedure_dialog_new (GIMP_VECTOR_LOAD_PROCEDURE (procedure),
GIMP_PROCEDURE_CONFIG (config),
&extracted_data, file);
/* TODO: in the old version, there used to be X and Y ratio fields which could
* be constrained/linked (or not) and would sync back and forth with the
* width/height fields. Are these needed? If so, should we try to automatize
* such UI when editing dimensions with options in GimpResolutionEntry?
*/
run = gimp_procedure_dialog_run (GIMP_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
static guchar *
pixbuf_gd_convert (const gint *gd_pixels,
gint width,
gint height)
{
const gint *gd_ptr = gd_pixels;
guchar *pixels;
guchar *px_ptr;
gint i, j;
pixels = (guchar *) g_try_malloc (width * height * sizeof (guchar) * 4);
if (! pixels)
return NULL;
px_ptr = pixels;
for (i = 0; i < height; i++)
for (j = 0; j < width; j++)
{
guchar r, g, b, a;
guint pixel = (guint) (*gd_ptr++);
b = (guchar) (pixel & 0xff);
pixel >>= 8;
g = (guchar) (pixel & 0xff);
pixel >>= 8;
r = (guchar) (pixel & 0xff);
pixel >>= 7;
a = (guchar) (pixel & 0xfe);
a ^= 0xff;
*px_ptr++ = r;
*px_ptr++ = g;
*px_ptr++ = b;
*px_ptr++ = a;
}
return pixels;
}
static guchar *
wmf_load_file (GFile *file,
gint requested_width,
gint requested_height,
gdouble resolution,
guint *width,
guint *height,
GError **error)
{
GMappedFile *mapped;
guchar *pixels = NULL;
/* the bits we need to decode the WMF via libwmf2's GD layer */
wmf_error_t err;
gulong flags;
wmf_gd_t *ddata = NULL;
wmfAPI *API = NULL;
wmfAPI_Options api_options;
wmfD_Rect bbox;
gint *gd_pixels = NULL;
char* wmffontdirs[2] = { NULL, NULL };
*width = *height = -1;
mapped = g_mapped_file_new (g_file_peek_path (file), FALSE, NULL);
if (! mapped)
return NULL;
flags = WMF_OPT_IGNORE_NONFATAL | WMF_OPT_FUNCTION;
api_options.function = wmf_gd_function;
#ifdef ENABLE_RELOCATABLE_RESOURCES
wmffontdirs[0] = g_build_filename (gimp_installation_directory (),
"share/libwmf/fonts/", NULL);
flags |= WMF_OPT_FONTDIRS;
api_options.fontdirs = wmffontdirs;
#endif
err = wmf_api_create (&API, flags, &api_options);
if (wmffontdirs[0])
g_free (wmffontdirs[0]);
if (err != wmf_E_None)
goto _wmf_error;
ddata = WMF_GD_GetData (API);
ddata->type = wmf_gd_image;
err = wmf_mem_open (API,
(guchar *) g_mapped_file_get_contents (mapped),
g_mapped_file_get_length (mapped));
if (err != wmf_E_None)
goto _wmf_error;
err = wmf_scan (API, 0, &bbox);
if (err != wmf_E_None)
goto _wmf_error;
err = wmf_display_size (API,
width, height,
resolution, resolution);
if (err != wmf_E_None || *width <= 0 || *height <= 0)
goto _wmf_error;
if (requested_width > 0 && requested_height > 0)
{
*width = requested_width;
*height = requested_height;
}
ddata->bbox = bbox;
ddata->width = *width;
ddata->height = *height;
err = wmf_play (API, 0, &bbox);
if (err != wmf_E_None)
goto _wmf_error;
if (ddata->gd_image != NULL)
gd_pixels = wmf_gd_image_pixels (ddata->gd_image);
if (gd_pixels == NULL)
goto _wmf_error;
pixels = pixbuf_gd_convert (gd_pixels, *width, *height);
if (pixels == NULL)
goto _wmf_error;
_wmf_error:
if (API)
{
wmf_mem_close (API);
wmf_api_destroy (API);
}
g_mapped_file_unref (mapped);
/* FIXME: improve error message */
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not open '%s' for reading"),
gimp_file_get_utf8_name (file));
return pixels;
}
/*
* 'load_image()' - Load a WMF image into a new image window.
*/
static GimpImage *
load_image (GFile *file,
gint requested_width,
gint requested_height,
gdouble resolution,
GError **error)
{
GimpImage *image;
GimpLayer *layer;
GeglBuffer *buffer;
guchar *pixels;
guint width, height;
gimp_progress_init_printf (_("Opening '%s'"),
gimp_file_get_utf8_name (file));
pixels = wmf_load_file (file, requested_width, requested_height, resolution,
&width, &height, error);
if (! pixels)
return NULL;
image = gimp_image_new (width, height, GIMP_RGB);
gimp_image_set_resolution (image, resolution, resolution);
layer = gimp_layer_new (image,
_("Rendered WMF"),
width, height,
GIMP_RGBA_IMAGE,
100,
gimp_image_get_default_new_layer_mode (image));
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
babl_format ("R'G'B'A u8"),
pixels, GEGL_AUTO_ROWSTRIDE);
g_object_unref (buffer);
g_free (pixels);
gimp_image_insert_layer (image, layer, NULL, 0);
gimp_progress_update (1.0);
return image;
}
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