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/*
* Copyright (C) 2007 Bastien Nocera <hadess@hadess.net>
*
* Authors: Bastien Nocera <hadess@hadess.net>
* Thomas Köckerbauer <tkoecker@gmx.net>
*
* 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.
*
*/
#include <string.h>
#include <glib.h>
#include <gio/gio.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/* From specs at http://www.bottledlight.com/ds/index.php/FileFormats/NDSFormat
* and code at http://www.kde-apps.org/content/show.php?content=39247 */
#define BOUND_ERROR(x) { \
if (error != NULL) { \
g_warning ("Couldn't access file data at 0x%x, probably not a NDS ROM: %s", x, error->message); \
g_error_free (error); \
} else \
g_warning ("Couldn't access file data at 0x%x, probably not a NDS ROM", x); \
if (stream != NULL) \
g_object_unref (stream); \
return 1; \
}
#define LOGO_OFFSET_OFFSET 0x068
#define BANNER_LENGTH 2112
#define TILE_DATA_OFFSET 32
#define TILE_DATA_LENGTH 512
#define PALETTE_DATA_OFFSET TILE_DATA_OFFSET + 512
#define PALETTE_DATA_LENGTH 32
struct palette_i {
guint8 r;
guint8 g;
guint8 b;
guint8 a;
};
static void
put_pixel (guchar *pixels, int rowstride, int x, int y, struct palette_i item)
{
int n_channels;
guchar *p;
n_channels = 4;
p = pixels + y * rowstride + x * n_channels;
p[0] = item.r;
p[1] = item.g;
p[2] = item.b;
p[3] = item.a;
}
GdkPixbuf *
load_icon (gchar *tile_data, guint16 *palette_data)
{
struct palette_i palette[16];
int pos, j, i, y, x;
GdkPixbuf *pixbuf;
guchar *pixels;
int rowstride;
/* Parse the palette */
for (i = 0; i < 16; i++) {
palette[i].r = (palette_data[i] & 0x001F) << 3;
palette[i].g = (palette_data[i] & 0x03E0) >> 2;
palette[i].b = (palette_data[i] & 0x7C00) >> 7;
palette[i].a = (i == 0) ? 0x00 : 0xFF;
}
/* Create the pixbuf */
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 32, 32);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
/* Put the grid of icon data into the pixbuf */
pos = 0;
for (j = 0; j < 4; j++) {
for (i = 0; i < 4; i++) {
for (y = 0; y < 8; y++) {
for (x = 0; x < 4; x++) {
put_pixel (pixels, rowstride, x * 2 + 8 * i, y + 8 * j, palette[tile_data[pos] & 0x0F]);
put_pixel (pixels, rowstride, x * 2 + 1 + 8 * i, y + 8 * j, palette[(tile_data[pos] & 0xF0)>>4]);
pos++;
}
}
}
}
return pixbuf;
}
static int output_size = 64;
static gboolean g_fatal_warnings = FALSE;
static char **filenames = NULL;
static const GOptionEntry entries[] = {
{ "size", 's', 0, G_OPTION_ARG_INT, &output_size, "Size of the thumbnail in pixels", NULL },
{"g-fatal-warnings", 0, 0, G_OPTION_ARG_NONE, &g_fatal_warnings, "Make all warnings fatal", NULL},
{ G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL, "[FILE...]" },
{ NULL }
};
int main (int argc, char **argv)
{
GMappedFile *map;
guint32 offset;
gchar *base;
gchar *tile_data;
guint16 *palette_data;
GdkPixbuf *pixbuf, *scaled;
GError *error = NULL;
GOptionContext *context;
GFile *input;
const char *output;
GFileInputStream *stream;
guint32 logo_offset[4];
char *banner_data;
/* Options parsing */
context = g_option_context_new ("Thumbnail Nintendo DS ROMs");
g_option_context_add_main_entries (context, entries, NULL);
g_type_init ();
if (g_option_context_parse (context, &argc, &argv, &error) == FALSE) {
g_warning ("Couldn't parse command-line options: %s", error->message);
g_error_free (error);
return 1;
}
/* Set fatal warnings if required */
if (g_fatal_warnings) {
GLogLevelFlags fatal_mask;
fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
g_log_set_always_fatal (fatal_mask);
}
if (filenames == NULL || g_strv_length (filenames) != 2) {
g_print ("Expects an input and an output file\n");
return 1;
}
input = g_file_new_for_commandline_arg (filenames[0]);
output = filenames[1];
/* Open the file for reading */
stream = g_file_read (input, NULL, &error);
g_object_unref (input);
if (stream == NULL) {
g_warning ("Couldn't open '%s': %s", filenames[0], error->message);
g_error_free (error);
return 1;
}
/* Get the address of the logo */
if (g_input_stream_skip (G_INPUT_STREAM (stream), LOGO_OFFSET_OFFSET, NULL, &error) == FALSE)
BOUND_ERROR(LOGO_OFFSET_OFFSET);
if (g_input_stream_read (G_INPUT_STREAM (stream), &logo_offset, sizeof(guint32), NULL, &error) == FALSE)
BOUND_ERROR(LOGO_OFFSET_OFFSET);
offset = GUINT32_FROM_LE(*logo_offset) - g_seekable_tell (G_SEEKABLE (stream));
/* Get the icon data */
if (g_input_stream_skip (G_INPUT_STREAM (stream), offset, NULL, &error) != offset)
BOUND_ERROR(offset);
banner_data = g_malloc0(BANNER_LENGTH);
if (g_input_stream_read (G_INPUT_STREAM (stream), banner_data, BANNER_LENGTH, NULL, &error) != BANNER_LENGTH)
BOUND_ERROR(LOGO_OFFSET_OFFSET);
g_input_stream_close (G_INPUT_STREAM (stream), NULL, NULL);
g_object_unref (stream);
/* Check the version is version 1, 3 or 19 (NDSi) */
if ((banner_data[0] != 0x1 || banner_data[1] != 0x0) &&
(banner_data[0] != 0x3 || banner_data[1] != 0x0) &&
(banner_data[0] != 0x3 || banner_data[1] != 0x1)) {
g_free (banner_data);
g_warning ("Unsupported icon version, probably not an NDS file");
return 1;
}
/* Get the tile and palette data for the logo */
tile_data = g_memdup (banner_data + TILE_DATA_OFFSET, TILE_DATA_LENGTH);
palette_data = g_memdup (banner_data + PALETTE_DATA_OFFSET, PALETTE_DATA_LENGTH);
g_free (banner_data);
pixbuf = load_icon (tile_data, palette_data);
g_free (palette_data);
g_free (tile_data);
scaled = gdk_pixbuf_scale_simple (pixbuf, output_size, output_size, GDK_INTERP_BILINEAR);
g_object_unref (pixbuf);
if (gdk_pixbuf_save (scaled, output, "png", &error, NULL) == FALSE) {
g_warning ("Couldn't save the thumbnail '%s' for file '%s': %s", output, filenames[0], error->message);
g_error_free (error);
return 1;
}
g_object_unref (scaled);
return 0;
}
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