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gimp/plug-ins/common/aa.c

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/**
* aa.c version 1.0
* A plugin that uses libaa (ftp://ftp.ta.jcu.cz/pub/aa) to save images as
* ASCII.
* NOTE: This plugin *requires* aalib 1.2 or later. Earlier versions will
* not work.
* Code copied from all over the GIMP source.
* Tim Newsome <nuisance@cmu.edu>
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <aalib.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/*
* Declare some local functions.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static void init_gtk (void);
static gboolean aa_savable (gint32 drawable_ID);
static gboolean save_aa (gint output_type,
gchar *filename,
gint32 image,
gint32 drawable);
static void gimp2aa (gint32 image,
gint32 drawable_ID,
aa_context *context);
static gint type_dialog (int selected);
static void type_dialog_ok_callback (GtkWidget *widget,
gpointer data);
static void type_dialog_toggle_update (GtkWidget *widget,
gpointer data);
static void type_dialog_cancel_callback (GtkWidget *widget,
gpointer data);
/*
* Some global variables.
*/
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/**
* Type the user selected. (Global for easier UI coding.)
*/
static gint selected_type = 0;
MAIN ()
static void
query (void)
{
static GParamDef save_args[] =
{
{PARAM_INT32, "run_mode", "Interactive, non-interactive"},
{PARAM_IMAGE, "image", "Input image"},
{PARAM_DRAWABLE, "drawable", "Drawable to save"},
{PARAM_STRING, "filename", "The name of the file to save the image in"},
{PARAM_STRING, "raw_filename", "The name entered"},
{PARAM_STRING, "file_type", "File type to use"}
};
static int nsave_args = sizeof(save_args) / sizeof(save_args[0]);
INIT_I18N();
gimp_install_procedure ("file_aa_save",
_("Saves files in various text formats"),
_("Saves files in various text formats"),
"Tim Newsome <nuisance@cmu.edu>",
"Tim Newsome <nuisance@cmu.edu>",
"1997",
"<Save>/AA",
"GRAY*", /* support grayscales */
PROC_PLUG_IN,
nsave_args, 0,
save_args, NULL);
gimp_register_save_handler ("file_aa_save", "ansi,txt,text,html", "");
}
/**
* Searches aa_formats defined by aalib to find the index of the type
* specified by string.
* -1 means it wasn't found.
*/
static int
get_type_from_string (char *string)
{
int type = 0;
aa_format **p = aa_formats;
while (*p && strcmp ((*p)->formatname, string))
{
p++;
type++;
}
if (*p == NULL)
return -1;
return type;
}
static void
run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals)
{
static GParam values[2];
GStatusType status = STATUS_SUCCESS;
GRunModeType run_mode;
gint output_type = 0;
static int last_type = 0;
gint32 image_ID;
gint32 drawable_ID;
GimpExportReturnType export = EXPORT_CANCEL;
/* Set us up to return a status. */
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = STATUS_CALLING_ERROR;
run_mode = param[0].data.d_int32;
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
switch (run_mode)
{
case RUN_INTERACTIVE:
case RUN_WITH_LAST_VALS:
INIT_I18N_UI();
init_gtk ();
export = gimp_export_image (&image_ID, &drawable_ID, "AA",
(CAN_HANDLE_GRAY | CAN_HANDLE_ALPHA));
if (export == EXPORT_CANCEL)
{
values[0].data.d_status = STATUS_EXECUTION_ERROR;
return;
}
break;
default:
INIT_I18N();
break;
}
if (!aa_savable (drawable_ID))
{
values[0].data.d_status = STATUS_CALLING_ERROR;
goto finish;
}
switch (run_mode)
{
case RUN_INTERACTIVE:
gimp_get_data ("file_aa_save", &last_type);
output_type = type_dialog (last_type);
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 6)
status = STATUS_CALLING_ERROR;
else
output_type = get_type_from_string (param[5].data.d_string);
break;
case RUN_WITH_LAST_VALS:
gimp_get_data ("file_aa_save", &last_type);
output_type = last_type;
break;
default:
break;
}
if (output_type < 0)
{
status = STATUS_CALLING_ERROR;
goto finish;
}
if (save_aa (output_type, param[3].data.d_string, image_ID, drawable_ID))
{
values[0].data.d_status = STATUS_EXECUTION_ERROR;
last_type = output_type;
gimp_set_data ("file_aa_save", &last_type, sizeof(last_type));
}
else
values[0].data.d_status = STATUS_SUCCESS;
finish:
if (export == EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
/**
* The actual save function. What it's all about.
* The image type has to be GRAY.
*/
static gboolean
save_aa (gint output_type,
gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
aa_savedata savedata = {NULL, NULL};
aa_context *context = NULL;
GDrawable *drawable = NULL;
aa_format format;
/*fprintf(stderr, "save %s\n", filename); */
drawable = gimp_drawable_get (drawable_ID);
memcpy (&format, aa_formats[output_type], sizeof (format));
format.width = drawable->width / 2;
format.height = drawable->height / 2;
/*fprintf(stderr, "save_aa %i x %i\n", format.width, format.height); */
/* Get a libaa context which will save its output to filename. */
savedata.name = filename;
savedata.format = &format;
context = aa_init (&save_d, &aa_defparams, &savedata);
if (context == NULL)
return TRUE;
gimp2aa (image_ID, drawable_ID, context);
aa_flush (context);
aa_close (context);
/*fprintf(stderr, "Success!\n"); */
return FALSE;
}
static void
gimp2aa (gint32 image,
gint32 drawable_ID,
aa_context *context)
{
gint width, height, x, y;
guchar *buffer;
GDrawable *drawable = NULL;
GPixelRgn pixel_rgn;
aa_renderparams *renderparams = NULL;
gint bpp;
width = aa_imgwidth (context);
height = aa_imgheight (context);
/*fprintf(stderr, "gimp2aa %i x %i\n", width, height); */
drawable = gimp_drawable_get (drawable_ID);
bpp = drawable->bpp;
buffer = g_new (guchar, width * bpp);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, drawable->width,
drawable->height, FALSE, FALSE);
for (y = 0; y < height; y++)
{
gimp_pixel_rgn_get_row (&pixel_rgn, buffer, 0, y, width);
for (x = 0; x < width; x++)
{
/* Just copy one byte. If it's indexed that's all we need. Otherwise
* it'll be the most significant one. */
aa_putpixel (context, x, y, buffer[x * bpp]);
}
}
renderparams = aa_getrenderparams ();
renderparams->dither = AA_FLOYD_S;
aa_render (context, renderparams, 0, 0,
aa_scrwidth (context), aa_scrheight (context));
}
static gboolean
aa_savable (gint32 drawable_ID)
{
GDrawableType drawable_type;
drawable_type = gimp_drawable_type (drawable_ID);
if (drawable_type != GRAY_IMAGE && drawable_type != GRAYA_IMAGE)
return FALSE;
return TRUE;
}
/*
* User Interface dialog thingie.
*/
static void
init_gtk (void)
{
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("aa");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
}
static gint
type_dialog (int selected)
{
GtkWidget *dlg;
GtkWidget *toggle;
GtkWidget *frame;
GtkWidget *toggle_vbox;
GSList *group;
/* Create the actual window. */
dlg = gimp_dialog_new (_("Save as Text"), "aa",
gimp_plugin_help_func, "filters/aa.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), gtk_widget_destroy,
NULL, 1, NULL, TRUE, FALSE,
_("Cancel"), type_dialog_cancel_callback,
NULL, NULL, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
/* file save type */
frame = gtk_frame_new (_("Data Formatting"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX(GTK_DIALOG(dlg)->vbox), frame, TRUE, TRUE, 0);
toggle_vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER(toggle_vbox), 4);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
group = NULL;
{
aa_format **p = aa_formats;
gint current = 0;
while (*p != NULL)
{
toggle = gtk_radio_button_new_with_label (group, (*p)->formatname);
group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
GTK_SIGNAL_FUNC (type_dialog_toggle_update),
(*p)->formatname);
if (current == selected)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), TRUE);
gtk_widget_show (toggle);
p++;
current++;
}
}
gtk_widget_show (toggle_vbox);
gtk_widget_show (frame);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return selected_type;
}
/*
* Callbacks for the dialog.
*/
static void
type_dialog_cancel_callback (GtkWidget *widget,
gpointer data)
{
selected_type = -1;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
type_dialog_toggle_update (GtkWidget *widget,
gpointer data)
{
selected_type = get_type_from_string ((char *)data);
}
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