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gimp/plug-ins/common/file-aa.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/>.
*/
/**
* 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 <string.h>
#include <aalib.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define SAVE_PROC "file-aa-save"
#define PLUG_IN_BINARY "file-aa"
typedef struct _Ascii Ascii;
typedef struct _AsciiClass AsciiClass;
struct _Ascii
{
GimpPlugIn parent_instance;
};
struct _AsciiClass
{
GimpPlugInClass parent_class;
};
#define ASCII_TYPE (ascii_get_type ())
#define ASCII (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), ASCII_TYPE, Ascii))
GType ascii_get_type (void) G_GNUC_CONST;
static GList * ascii_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * ascii_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * ascii_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data);
static gboolean save_aa (GFile *file,
GimpDrawable *drawable,
GObject *config,
GError **error);
static void gimp2aa (GimpDrawable *drawable,
aa_context *context);
static gboolean save_dialog (GimpProcedure *procedure,
GObject *config,
GimpImage *image);
G_DEFINE_TYPE (Ascii, ascii, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (ASCII_TYPE)
DEFINE_STD_SET_I18N
static void
ascii_class_init (AsciiClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = ascii_query_procedures;
plug_in_class->create_procedure = ascii_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
ascii_init (Ascii *ascii)
{
}
static GList *
ascii_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (SAVE_PROC));
}
static GimpProcedure *
ascii_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, SAVE_PROC))
{
gint i;
procedure = gimp_save_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
FALSE, ascii_save, NULL, NULL);
gimp_procedure_set_image_types (procedure, "*");
gimp_procedure_set_menu_label (procedure, _("ASCII art"));
gimp_file_procedure_set_format_name (GIMP_FILE_PROCEDURE (procedure),
_("ASCII art"));
gimp_procedure_set_documentation (procedure,
_("Saves grayscale image in various "
"text formats"),
_("This plug-in uses aalib to save "
"grayscale image as ascii art into "
"a variety of text formats"),
name);
gimp_procedure_set_attribution (procedure,
"Tim Newsome <nuisance@cmu.edu>",
"Tim Newsome <nuisance@cmu.edu>",
"1997");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"text/plain");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"txt,ansi,text");
for (i = 0; aa_formats[i]; i++);
GIMP_PROC_ARG_INT (procedure, "file-type",
_("_Format"),
_("File type to use"),
0, i, 0,
G_PARAM_READWRITE);
}
return procedure;
}
static GimpValueArray *
ascii_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
gegl_init (NULL, NULL);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY);
export = gimp_export_image (&image, &n_drawables, &drawables, "AA",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED |
GIMP_EXPORT_CAN_HANDLE_ALPHA);
if (export == GIMP_EXPORT_CANCEL)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
break;
default:
break;
}
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("ASCII art does not support multiple layers."));
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CALLING_ERROR,
error);
}
if (run_mode == GIMP_RUN_INTERACTIVE)
{
if (! save_dialog (procedure, G_OBJECT (config), image))
status = GIMP_PDB_CANCEL;
}
if (status == GIMP_PDB_SUCCESS)
{
if (! save_aa (file, drawables[0], G_OBJECT (config), &error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
{
gimp_image_delete (image);
g_free (drawables);
}
return gimp_procedure_new_return_values (procedure, status, error);
}
static gboolean
save_aa (GFile *file,
GimpDrawable *drawable,
GObject *config,
GError **error)
{
aa_savedata savedata;
aa_context *context;
aa_format format;
gint output_type;
g_object_get (config,
"file-type", &output_type,
NULL);
memcpy (&format, aa_formats[output_type], sizeof (aa_format));
format.width = gimp_drawable_get_width (drawable) / 2;
format.height = gimp_drawable_get_height (drawable) / 2;
/* Get a libaa context which will save its output to filename. */
savedata.name = g_file_get_path (file);
savedata.format = &format;
context = aa_init (&save_d, &aa_defparams, &savedata);
if (! context)
return FALSE;
gimp2aa (drawable, context);
aa_flush (context);
aa_close (context);
return TRUE;
}
static void
gimp2aa (GimpDrawable *drawable,
aa_context *context)
{
GeglBuffer *buffer;
const Babl *format;
aa_renderparams *renderparams;
gint width;
gint height;
gint x, y;
gint bpp;
guchar *buf;
guchar *p;
buffer = gimp_drawable_get_buffer (drawable);
width = aa_imgwidth (context);
height = aa_imgheight (context);
switch (gimp_drawable_type (drawable))
{
case GIMP_GRAY_IMAGE:
format = babl_format ("Y' u8");
break;
case GIMP_GRAYA_IMAGE:
format = babl_format ("Y'A u8");
break;
case GIMP_RGB_IMAGE:
case GIMP_INDEXED_IMAGE:
format = babl_format ("R'G'B' u8");
break;
case GIMP_RGBA_IMAGE:
case GIMP_INDEXEDA_IMAGE:
format = babl_format ("R'G'B'A u8");
break;
default:
g_return_if_reached ();
break;
}
bpp = babl_format_get_bytes_per_pixel (format);
buf = g_new (guchar, width * bpp);
for (y = 0; y < height; y++)
{
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, y, width, 1), 1.0,
format, buf,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
switch (bpp)
{
case 1: /* GRAY */
for (x = 0, p = buf; x < width; x++, p++)
aa_putpixel (context, x, y, *p);
break;
case 2: /* GRAYA, blend over black */
for (x = 0, p = buf; x < width; x++, p += 2)
aa_putpixel (context, x, y, (p[0] * (p[1] + 1)) >> 8);
break;
case 3: /* RGB */
for (x = 0, p = buf; x < width; x++, p += 3)
aa_putpixel (context, x, y,
GIMP_RGB_LUMINANCE (p[0], p[1], p[2]) + 0.5);
break;
case 4: /* RGBA, blend over black */
for (x = 0, p = buf; x < width; x++, p += 4)
aa_putpixel (context, x, y,
((guchar) (GIMP_RGB_LUMINANCE (p[0], p[1], p[2]) + 0.5)
* (p[3] + 1)) >> 8);
break;
default:
g_assert_not_reached ();
break;
}
}
g_free (buf);
g_object_unref (buffer);
renderparams = aa_getrenderparams ();
renderparams->dither = AA_FLOYD_S;
aa_render (context, renderparams, 0, 0,
aa_scrwidth (context), aa_scrheight (context));
}
static gboolean
save_dialog (GimpProcedure *procedure,
GObject *config,
GimpImage *image)
{
GtkWidget *dialog;
GtkListStore *store;
GtkWidget *combo;
gint i;
gboolean run;
dialog = gimp_save_procedure_dialog_new (GIMP_SAVE_PROCEDURE (procedure),
GIMP_PROCEDURE_CONFIG (config),
image);
store = g_object_new (GIMP_TYPE_INT_STORE, NULL);
for (i = 0; aa_formats[i]; i++)
gtk_list_store_insert_with_values (store, NULL, -1,
GIMP_INT_STORE_VALUE, i,
GIMP_INT_STORE_LABEL, aa_formats[i]->formatname,
-1);
combo = gimp_procedure_dialog_get_int_combo (GIMP_PROCEDURE_DIALOG (dialog),
"file-type",
GIMP_INT_STORE (store));
g_object_set (combo, "margin", 12, NULL);
gimp_procedure_dialog_fill (GIMP_PROCEDURE_DIALOG (dialog), NULL);
gtk_widget_show (dialog);
run = gimp_procedure_dialog_run (GIMP_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
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