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gimp/plug-ins/common/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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* WMF loading file filter for the 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 "wmf"
#define WMF_DEFAULT_RESOLUTION 90.0
#define WMF_DEFAULT_SIZE 500
#define WMF_PREVIEW_SIZE 128
typedef struct
{
gdouble resolution;
gint width;
gint height;
} WmfLoadVals;
static WmfLoadVals load_vals =
{
WMF_DEFAULT_RESOLUTION,
0,
0,
};
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (const gchar *filename);
static gboolean load_wmf_size (const gchar *filename,
WmfLoadVals *vals);
static gboolean load_dialog (const gchar *filename);
static guchar *wmf_get_pixbuf (const gchar *filename,
gint *width,
gint *height);
static guchar *wmf_load_file (const gchar *filename,
guint *width,
guint *height);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
MAIN ()
/*
* 'query()' - Respond to a plug-in query...
*/
static void
query (void)
{
static const GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to load" },
{ GIMP_PDB_FLOAT, "resolution", "Resolution to use for rendering the WMF (defaults to 72 dpi" },
{ GIMP_PDB_INT32, "width", "Width (in pixels) to load the WMF in, 0 for original width" },
{ GIMP_PDB_INT32, "height", "Height (in pixels) to load the WMF in, 0 for original height" }
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const GimpParamDef thumb_args[] =
{
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_INT32, "thumb-size", "Preferred thumbnail size" }
};
static const GimpParamDef thumb_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Thumbnail image" },
{ GIMP_PDB_INT32, "image-width", "Width of full-sized image" },
{ GIMP_PDB_INT32, "image-height", "Height of full-sized image" }
};
gimp_install_procedure (LOAD_PROC,
"Loads files in the WMF file format",
"Loads files in the WMF file format",
"Dom Lachowicz <cinamod@hotmail.com>",
"Dom Lachowicz <cinamod@hotmail.com>",
"(c) 2003 - Version 0.3.0",
N_("Microsoft WMF file"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime (LOAD_PROC, "image/x-wmf");
gimp_register_magic_load_handler (LOAD_PROC,
"wmf,apm", "",
"0,string,\\327\\315\\306\\232,0,string,\\1\\0\\11\\0");
gimp_install_procedure (LOAD_THUMB_PROC,
"Loads a small preview from a WMF image",
"",
"Dom Lachowicz <cinamod@hotmail.com>",
"Dom Lachowicz <cinamod@hotmail.com>",
"(c) 2003 - Version 0.3.0",
NULL,
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (thumb_args),
G_N_ELEMENTS (thumb_return_vals),
thumb_args, thumb_return_vals);
gimp_register_thumbnail_loader (LOAD_PROC, LOAD_THUMB_PROC);
}
/*
* 'run()' - Run the plug-in...
*/
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[4];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
const gchar *filename = NULL;
gint32 image_ID = -1;
gint width = 0;
gint height = 0;
INIT_I18N ();
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, LOAD_PROC) == 0)
{
filename = param[1].data.d_string;
gimp_get_data (LOAD_PROC, &load_vals);
switch (run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
if (nparams > 3) load_vals.resolution = param[3].data.d_float;
if (nparams > 4) load_vals.width = param[4].data.d_int32;
if (nparams > 5) load_vals.height = param[5].data.d_int32;
break;
case GIMP_RUN_INTERACTIVE:
if (!load_dialog (param[1].data.d_string))
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_WITH_LAST_VALS:
break;
}
}
else if (strcmp (name, LOAD_THUMB_PROC) == 0)
{
gint size = param[1].data.d_int32;
filename = param[0].data.d_string;
if (size > 0 &&
load_wmf_size (filename, &load_vals) &&
load_vals.width > 0 &&
load_vals.height > 0)
{
width = load_vals.width;
height = load_vals.height;
if ((gdouble) load_vals.width > (gdouble) load_vals.height)
{
load_vals.width = size;
load_vals.height *= size / (gdouble) load_vals.width;
}
else
{
load_vals.width *= size / (gdouble) load_vals.height;
load_vals.height = size;
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
if (load_vals.resolution < GIMP_MIN_RESOLUTION ||
load_vals.resolution > GIMP_MAX_RESOLUTION)
{
load_vals.resolution = WMF_DEFAULT_RESOLUTION;
}
image_ID = load_image (filename);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (status == GIMP_PDB_SUCCESS)
{
if (strcmp (name, LOAD_THUMB_PROC) == 0)
{
*nreturn_vals = 4;
values[2].type = GIMP_PDB_INT32;
values[2].data.d_int32 = width;
values[3].type = GIMP_PDB_INT32;
values[3].data.d_int32 = height;
}
else
{
gimp_set_data (LOAD_PROC, &load_vals, sizeof (load_vals));
}
}
values[0].data.d_status = status;
}
static GtkWidget *size_label = NULL;
/* This function retrieves the pixel size from a WMF file. */
static gboolean
load_wmf_size (const gchar *filename,
WmfLoadVals *vals)
{
/* 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;
guint width;
guint height;
gboolean success = TRUE;
width = height = -1;
flags = WMF_OPT_IGNORE_NONFATAL | WMF_OPT_FUNCTION;
api_options.function = wmf_gd_function;
err = wmf_api_create (&API, flags, &api_options);
if (err != wmf_E_None)
success = FALSE;
ddata = WMF_GD_GetData (API);
ddata->type = wmf_gd_image;
err = wmf_file_open (API, filename);
if (err != wmf_E_None)
success = FALSE;
err = wmf_scan (API, 0, &bbox);
if (err != wmf_E_None)
success = FALSE;
err = wmf_display_size (API, &width, &height,
vals->resolution, vals->resolution);
if (err != wmf_E_None || width <= 0 || height <= 0)
success = FALSE;
if (width < 1 || height < 1)
{
width = WMF_DEFAULT_SIZE;
height = WMF_DEFAULT_SIZE;
if (size_label)
gtk_label_set_text (GTK_LABEL (size_label),
_("WMF file does not\nspecify a size!"));
}
else
{
if (size_label)
{
gchar *text = g_strdup_printf (_("%d × %d"), width, height);
gtk_label_set_text (GTK_LABEL (size_label), text);
g_free (text);
}
}
vals->width = width;
vals->height = height;
return success;
}
/* User interface */
static GimpSizeEntry *size = NULL;
static GtkObject *xadj = NULL;
static GtkObject *yadj = NULL;
static GtkWidget *constrain = NULL;
static gdouble ratio_x = 1.0;
static gdouble ratio_y = 1.0;
static gint wmf_width = 0;
static gint wmf_height = 0;
static void load_dialog_set_ratio (gdouble x,
gdouble y);
static void
load_dialog_size_callback (GtkWidget *widget,
gpointer data)
{
if (gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (constrain)))
{
gdouble x = gimp_size_entry_get_refval (size, 0) / (gdouble) wmf_width;
gdouble y = gimp_size_entry_get_refval (size, 1) / (gdouble) wmf_height;
if (x != ratio_x)
{
load_dialog_set_ratio (x, x);
}
else if (y != ratio_y)
{
load_dialog_set_ratio (y, y);
}
}
}
static void
load_dialog_ratio_callback (GtkAdjustment *adj,
gpointer data)
{
gdouble x = gtk_adjustment_get_value (GTK_ADJUSTMENT (xadj));
gdouble y = gtk_adjustment_get_value (GTK_ADJUSTMENT (yadj));
if (gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (constrain)))
{
if (x != ratio_x)
y = x;
else
x = y;
}
load_dialog_set_ratio (x, y);
}
static void
load_dialog_resolution_callback (GimpSizeEntry *res,
const gchar *filename)
{
WmfLoadVals vals = { 0.0, 0, 0 };
load_vals.resolution = vals.resolution = gimp_size_entry_get_refval (res, 0);
if (!load_wmf_size (filename, &vals))
return;
wmf_width = vals.width;
wmf_height = vals.height;
load_dialog_set_ratio (ratio_x, ratio_y);
}
static void
wmf_preview_callback (GtkWidget *widget,
GtkAllocation *allocation,
guchar *pixels)
{
gimp_preview_area_draw (GIMP_PREVIEW_AREA (widget),
0, 0, allocation->width, allocation->height,
GIMP_RGBA_IMAGE,
pixels, allocation->width * 4);
}
static void
load_dialog_set_ratio (gdouble x,
gdouble y)
{
ratio_x = x;
ratio_y = y;
g_signal_handlers_block_by_func (size, load_dialog_size_callback, NULL);
gimp_size_entry_set_refval (size, 0, wmf_width * x);
gimp_size_entry_set_refval (size, 1, wmf_height * y);
g_signal_handlers_unblock_by_func (size, load_dialog_size_callback, NULL);
g_signal_handlers_block_by_func (xadj, load_dialog_ratio_callback, NULL);
g_signal_handlers_block_by_func (yadj, load_dialog_ratio_callback, NULL);
gtk_adjustment_set_value (GTK_ADJUSTMENT (xadj), x);
gtk_adjustment_set_value (GTK_ADJUSTMENT (yadj), y);
g_signal_handlers_unblock_by_func (xadj, load_dialog_ratio_callback, NULL);
g_signal_handlers_unblock_by_func (yadj, load_dialog_ratio_callback, NULL);
}
static gboolean
load_dialog (const gchar *filename)
{
GtkWidget *dialog;
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *image;
GtkWidget *table;
GtkWidget *table2;
GtkWidget *abox;
GtkWidget *res;
GtkWidget *label;
GtkWidget *spinbutton;
GtkObject *adj;
guchar *pixels;
gboolean run = FALSE;
WmfLoadVals vals = { WMF_DEFAULT_RESOLUTION,
- WMF_PREVIEW_SIZE, - WMF_PREVIEW_SIZE };
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Render Windows Metafile"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, LOAD_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
hbox = gtk_hbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), hbox,
TRUE, TRUE, 0);
gtk_widget_show (hbox);
/* The WMF preview */
vbox = gtk_vbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (vbox), abox, FALSE, FALSE, 0);
gtk_widget_show (abox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (abox), frame);
gtk_widget_show (frame);
pixels = wmf_get_pixbuf (filename, &vals.width, &vals.height);
image = gimp_preview_area_new ();
gtk_widget_set_size_request (image, vals.width, vals.height);
gtk_container_add (GTK_CONTAINER (frame), image);
gtk_widget_show (image);
g_signal_connect (image, "size_allocate",
G_CALLBACK (wmf_preview_callback),
pixels);
size_label = gtk_label_new (NULL);
gtk_label_set_justify (GTK_LABEL (size_label), GTK_JUSTIFY_CENTER);
gtk_misc_set_alignment (GTK_MISC (size_label), 0.5, 0.0);
gtk_box_pack_start (GTK_BOX (vbox), size_label, TRUE, TRUE, 4);
gtk_widget_show (size_label);
/* query the initial size after the size label is created */
vals.resolution = load_vals.resolution;
load_wmf_size (filename, &vals);
wmf_width = vals.width;
wmf_height = vals.height;
table = gtk_table_new (7, 3, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
gtk_table_set_row_spacing (GTK_TABLE (table), 2, 2);
gtk_box_pack_start (GTK_BOX (hbox), table, TRUE, TRUE, 0);
gtk_widget_show (table);
/* Width and Height */
label = gtk_label_new (_("Width:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
label = gtk_label_new (_("Height:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
hbox = gtk_hbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (hbox);
spinbutton = gimp_spin_button_new (&adj, 1, 1, 1, 1, 10, 1, 1, 2);
gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), 10);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
hbox = gtk_hbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (hbox);
size = GIMP_SIZE_ENTRY (gimp_size_entry_new (1, GIMP_UNIT_PIXEL, "%a",
TRUE, FALSE, FALSE, 10,
GIMP_SIZE_ENTRY_UPDATE_SIZE));
gtk_table_set_col_spacing (GTK_TABLE (size), 1, 6);
gimp_size_entry_add_field (size, GTK_SPIN_BUTTON (spinbutton), NULL);
gtk_box_pack_start (GTK_BOX (hbox), GTK_WIDGET (size), FALSE, FALSE, 0);
gtk_widget_show (GTK_WIDGET (size));
gimp_size_entry_set_refval_boundaries (size, 0,
GIMP_MIN_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE);
gimp_size_entry_set_refval_boundaries (size, 1,
GIMP_MIN_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE);
gimp_size_entry_set_refval (size, 0, wmf_width);
gimp_size_entry_set_refval (size, 1, wmf_height);
gimp_size_entry_set_resolution (size, 0, load_vals.resolution, FALSE);
gimp_size_entry_set_resolution (size, 1, load_vals.resolution, FALSE);
g_signal_connect (size, "value-changed",
G_CALLBACK (load_dialog_size_callback),
NULL);
/* Scale ratio */
hbox = gtk_hbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, 2, 4,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (hbox);
table2 = gtk_table_new (2, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table2), 0, 2);
gtk_table_set_row_spacing (GTK_TABLE (table2), 0, 4);
gtk_box_pack_start (GTK_BOX (hbox), table2, FALSE, FALSE, 0);
spinbutton =
gimp_spin_button_new (&xadj,
ratio_x,
(gdouble) GIMP_MIN_IMAGE_SIZE / (gdouble) wmf_width,
(gdouble) GIMP_MAX_IMAGE_SIZE / (gdouble) wmf_width,
0.01, 0.1, 1,
0.01, 4);
gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), 10);
gtk_table_attach_defaults (GTK_TABLE (table2), spinbutton, 0, 1, 0, 1);
gtk_widget_show (spinbutton);
g_signal_connect (xadj, "value-changed",
G_CALLBACK (load_dialog_ratio_callback),
NULL);
label = gtk_label_new_with_mnemonic (_("_X ratio:"));
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
spinbutton =
gimp_spin_button_new (&yadj,
ratio_y,
(gdouble) GIMP_MIN_IMAGE_SIZE / (gdouble) wmf_height,
(gdouble) GIMP_MAX_IMAGE_SIZE / (gdouble) wmf_height,
0.01, 0.1, 1,
0.01, 4);
gtk_entry_set_width_chars (GTK_ENTRY (spinbutton), 10);
gtk_table_attach_defaults (GTK_TABLE (table2), spinbutton, 0, 1, 1, 2);
gtk_widget_show (spinbutton);
g_signal_connect (yadj, "value-changed",
G_CALLBACK (load_dialog_ratio_callback),
NULL);
label = gtk_label_new_with_mnemonic (_("_Y ratio:"));
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 3, 4,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
/* the constrain ratio chainbutton */
constrain = gimp_chain_button_new (GIMP_CHAIN_RIGHT);
gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (constrain), TRUE);
gtk_table_attach_defaults (GTK_TABLE (table2), constrain, 1, 2, 0, 2);
gtk_widget_show (constrain);
gimp_help_set_help_data (GIMP_CHAIN_BUTTON (constrain)->button,
_("Constrain aspect ratio"), NULL);
gtk_widget_show (table2);
/* Resolution */
label = gtk_label_new (_("Resolution:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 4, 5,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (label);
res = gimp_size_entry_new (1, GIMP_UNIT_INCH, _("pixels/%a"),
FALSE, FALSE, FALSE, 10,
GIMP_SIZE_ENTRY_UPDATE_RESOLUTION);
gtk_table_set_col_spacing (GTK_TABLE (res), 1, 6);
gtk_table_attach (GTK_TABLE (table), res, 1, 2, 4, 5,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (res);
/* don't let the resolution become too small ? does libwmf tend to
crash with very small resolutions */
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (res), 0,
5.0, GIMP_MAX_RESOLUTION);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (res), 0, load_vals.resolution);
g_signal_connect (res, "value-changed",
G_CALLBACK (load_dialog_resolution_callback),
(gpointer) filename);
gtk_widget_show (dialog);
if (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK)
{
load_vals.width = ROUND (gimp_size_entry_get_refval (size, 0));
load_vals.height = ROUND (gimp_size_entry_get_refval (size, 1));
run = TRUE;
}
gtk_widget_destroy (GTK_WIDGET (dialog));
return run;
}
static guchar *
pixbuf_gd_convert (gint *gd_pixels,
gint width,
gint height)
{
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_get_pixbuf (const gchar *filename,
gint *width,
gint *height)
{
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;
guint file_width;
guint file_height;
wmfD_Rect bbox;
gint *gd_pixels = NULL;
flags = WMF_OPT_IGNORE_NONFATAL | WMF_OPT_FUNCTION;
api_options.function = wmf_gd_function;
err = wmf_api_create (&API, flags, &api_options);
if (err != wmf_E_None)
goto _wmf_error;
ddata = WMF_GD_GetData (API);
ddata->type = wmf_gd_image;
err = wmf_file_open (API, filename);
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, &file_width, &file_height,
WMF_DEFAULT_RESOLUTION, WMF_DEFAULT_RESOLUTION);
if (err != wmf_E_None || file_width <= 0 || file_height <= 0)
goto _wmf_error;
if (!*width || !*height)
goto _wmf_error;
/* either both arguments negative or none */
if ((*width * *height) < 0)
goto _wmf_error;
ddata->bbox = bbox;
if (*width > 0)
{
ddata->width = *width;
ddata->height = *height;
}
else
{
gdouble w = file_width;
gdouble h = file_height;
gdouble aspect = ((gdouble) *width) / (gdouble) *height;
if (aspect > (w / h))
{
ddata->height = abs (*height);
ddata->width = (gdouble) abs (*width) * (w / h) + 0.5;
}
else
{
ddata->width = abs (*width);
ddata->height = (gdouble) abs (*height) / (w / h) + 0.5;
}
}
err = wmf_play (API, 0, &bbox);
if (err != wmf_E_None)
goto _wmf_error;
wmf_file_close (API);
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, ddata->width, ddata->height);
if (pixels == NULL)
goto _wmf_error;
wmf_api_destroy (API);
API = NULL;
*width = ddata->width;
*height = ddata->height;
_wmf_error:
if (API)
wmf_api_destroy (API);
return pixels;
}
static guchar *
wmf_load_file (const gchar *filename,
guint *width,
guint *height)
{
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;
*width = *height = -1;
flags = WMF_OPT_IGNORE_NONFATAL | WMF_OPT_FUNCTION;
api_options.function = wmf_gd_function;
err = wmf_api_create (&API, flags, &api_options);
if (err != wmf_E_None)
goto _wmf_error;
ddata = WMF_GD_GetData (API);
ddata->type = wmf_gd_image;
err = wmf_file_open (API, filename);
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,
load_vals.resolution, load_vals.resolution);
if (err != wmf_E_None || *width <= 0 || *height <= 0)
goto _wmf_error;
if (load_vals.width > 0 && load_vals.height > 0)
{
*width = load_vals.width;
*height = load_vals.height;
}
ddata->bbox = bbox;
ddata->width = *width;
ddata->height = *height;
err = wmf_play (API, 0, &bbox);
if (err != wmf_E_None)
goto _wmf_error;
wmf_file_close (API);
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_api_destroy (API);
API = NULL;
_wmf_error:
if (API)
wmf_api_destroy (API);
return pixels;
}
/*
* 'load_image()' - Load a WMF image into a new image window.
*/
static gint32
load_image (const gchar *filename)
{
gint32 image;
gint32 layer;
GimpDrawable *drawable;
guchar *pixels;
GimpPixelRgn pixel_rgn;
guint width, height;
guint rowstride;
guint count = 0;
guint done = 0;
gpointer pr;
pixels = wmf_load_file (filename, &width, &height);
rowstride = width * 4;
if (!pixels)
{
g_message (_("Could not open '%s' for reading."),
gimp_filename_to_utf8 (filename));
gimp_quit ();
}
gimp_progress_init_printf (_("Opening '%s'"),
gimp_filename_to_utf8 (filename));
image = gimp_image_new (width, height, GIMP_RGB);
gimp_image_set_filename (image, filename);
gimp_image_set_resolution (image,
load_vals.resolution, load_vals.resolution);
layer = gimp_layer_new (image,
_("Rendered WMF"),
width, height,
GIMP_RGBA_IMAGE, 100, GIMP_NORMAL_MODE);
drawable = gimp_drawable_get (layer);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, width, height, TRUE, FALSE);
for (pr = gimp_pixel_rgns_register (1, &pixel_rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src = pixels + pixel_rgn.y * rowstride + pixel_rgn.x * 4;
guchar *dest = pixel_rgn.data;
gint y;
for (y = 0; y < pixel_rgn.h; y++)
{
memcpy (dest, src, pixel_rgn.w * pixel_rgn.bpp);
src += rowstride;
dest += pixel_rgn.rowstride;
}
done += pixel_rgn.h * pixel_rgn.w;
if (count++ % 16 == 0)
gimp_progress_update ((gdouble) done / (width * height));
}
g_free (pixels);
gimp_drawable_detach (drawable);
gimp_progress_update (1.0);
/* Tell the GIMP to display the image.
*/
gimp_image_add_layer (image, layer, 0);
gimp_drawable_flush (drawable);
return image;
}
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