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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>
+ */
+
+/* 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/>.
+ */
+
+#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"
+#define PLUG_IN_ROLE "gimp-file-aa"
+
+
+/*
+ * Declare some local functions.
+ */
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+static gboolean save_aa (gint32 drawable_ID,
+ gchar *filename,
+ gint output_type);
+static void gimp2aa (gint32 drawable_ID,
+ aa_context *context);
+
+static gint aa_dialog (gint selected);
+
+
+/*
+ * Some global variables.
+ */
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+
+MAIN ()
+
+static void
+query (void)
+{
+ static const GimpParamDef save_args[] =
+ {
+ {GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }"},
+ {GIMP_PDB_IMAGE, "image", "Input image"},
+ {GIMP_PDB_DRAWABLE, "drawable", "Drawable to save"},
+ {GIMP_PDB_STRING, "filename", "The name of the file to save the image in"},
+ {GIMP_PDB_STRING, "raw-filename", "The name entered"},
+ {GIMP_PDB_STRING, "file-type", "File type to use"}
+ };
+
+ gimp_install_procedure (SAVE_PROC,
+ "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",
+ "Tim Newsome <nuisance@cmu.edu>",
+ "Tim Newsome <nuisance@cmu.edu>",
+ "1997",
+ N_("ASCII art"),
+ "RGB*, GRAY*, INDEXED*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (save_args), 0,
+ save_args, NULL);
+
+ gimp_register_file_handler_mime (SAVE_PROC, "text/plain");
+ gimp_register_save_handler (SAVE_PROC, "txt,ansi,text", "");
+}
+
+/**
+ * Searches aa_formats defined by aalib to find the index of the type
+ * specified by string.
+ * -1 means it wasn't found.
+ */
+static gint
+get_type_from_string (const gchar *string)
+{
+ gint type = 0;
+ aa_format **p = (aa_format **) aa_formats;
+
+ while (*p && strcmp ((*p)->formatname, string))
+ {
+ p++;
+ type++;
+ }
+
+ if (*p == NULL)
+ return -1;
+
+ return type;
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[2];
+ GimpRunMode run_mode;
+ GimpPDBStatusType status = GIMP_PDB_SUCCESS;
+ gint output_type = 0;
+ gint32 image_ID;
+ gint32 drawable_ID;
+ GimpExportReturn export = GIMP_EXPORT_CANCEL;
+
+ INIT_I18N ();
+ gegl_init (NULL, NULL);
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
+
+ run_mode = param[0].data.d_int32;
+ image_ID = param[1].data.d_int32;
+ drawable_ID = param[2].data.d_int32;
+
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ case GIMP_RUN_WITH_LAST_VALS:
+ gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+ export = gimp_export_image (&image_ID, &drawable_ID, "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)
+ {
+ values[0].data.d_status = GIMP_PDB_CANCEL;
+ return;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (! (gimp_drawable_is_rgb (drawable_ID) ||
+ gimp_drawable_is_gray (drawable_ID)))
+ {
+ status = GIMP_PDB_CALLING_ERROR;
+ }
+
+ if (status == GIMP_PDB_SUCCESS)
+ {
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ gimp_get_data (SAVE_PROC, &output_type);
+ output_type = aa_dialog (output_type);
+ if (output_type < 0)
+ status = GIMP_PDB_CANCEL;
+ break;
+
+ case GIMP_RUN_NONINTERACTIVE:
+ /* Make sure all the arguments are there! */
+ if (nparams != 6)
+ {
+ status = GIMP_PDB_CALLING_ERROR;
+ }
+ else
+ {
+ output_type = get_type_from_string (param[5].data.d_string);
+ if (output_type < 0)
+ status = GIMP_PDB_CALLING_ERROR;
+ }
+ break;
+
+ case GIMP_RUN_WITH_LAST_VALS:
+ gimp_get_data (SAVE_PROC, &output_type);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (status == GIMP_PDB_SUCCESS)
+ {
+ if (save_aa (drawable_ID, param[3].data.d_string, output_type))
+ {
+ gimp_set_data (SAVE_PROC, &output_type, sizeof (output_type));
+ }
+ else
+ {
+ status = GIMP_PDB_EXECUTION_ERROR;
+ }
+ }
+
+ if (export == GIMP_EXPORT_EXPORT)
+ gimp_image_delete (image_ID);
+
+ values[0].data.d_status = status;
+}
+
+/**
+ * The actual save function. What it's all about.
+ * The image type has to be GRAY.
+ */
+static gboolean
+save_aa (gint32 drawable_ID,
+ gchar *filename,
+ gint output_type)
+{
+ aa_savedata savedata;
+ aa_context *context;
+ aa_format format = *aa_formats[output_type];
+
+ format.width = gimp_drawable_width (drawable_ID) / 2;
+ format.height = gimp_drawable_height (drawable_ID) / 2;
+
+ /* 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)
+ return FALSE;
+
+ gimp2aa (drawable_ID, context);
+ aa_flush (context);
+ aa_close (context);
+
+ return TRUE;
+}
+
+static void
+gimp2aa (gint32 drawable_ID,
+ 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_ID);
+
+ width = aa_imgwidth (context);
+ height = aa_imgheight (context);
+
+ switch (gimp_drawable_type (drawable_ID))
+ {
+ 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 gint
+aa_dialog (gint selected)
+{
+ GtkWidget *dialog;
+ GtkWidget *hbox;
+ GtkWidget *label;
+ GtkWidget *combo;
+ gint i;
+
+ /* Create the actual window. */
+ dialog = gimp_export_dialog_new (_("Text"), PLUG_IN_BINARY, SAVE_PROC);
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
+ gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
+ hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ label = gtk_label_new_with_mnemonic (_("_Format:"));
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ combo = g_object_new (GIMP_TYPE_INT_COMBO_BOX, NULL);
+ gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
+ gtk_widget_show (combo);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
+
+ for (i = 0; aa_formats[i]; i++)
+ gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (combo),
+ GIMP_INT_STORE_VALUE, i,
+ GIMP_INT_STORE_LABEL, aa_formats[i]->formatname,
+ -1);
+
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), selected,
+ G_CALLBACK (gimp_int_combo_box_get_active),
+ &selected);
+
+ gtk_widget_show (dialog);
+
+ if (gimp_dialog_run (GIMP_DIALOG (dialog)) != GTK_RESPONSE_OK)
+ selected = -1;
+
+ gtk_widget_destroy (dialog);
+
+ return selected;
+}
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