2 * 2ooM: The Master of Orion II Reverse Engineering Project
3 * Routines for rendering LBX images to a GdkPixbuf.
4 * Copyright (C) 2010 Nick Bowler
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 /* LBX images can have up to three palettes, with each superseding the last. */
26 struct lbx_colour palette_external[256];
27 struct lbx_colour palette_internal[256];
28 struct lbx_colour palette_override[256];
30 static void get_colour(unsigned char index, unsigned char out[static 4])
32 struct lbx_colour *colour;
34 if (palette_override[index].active)
35 colour = palette_override + index;
36 else if (palette_internal[index].active)
37 colour = palette_internal + index;
38 else if (palette_external[index].active)
39 colour = palette_external + index;
41 colour = &(struct lbx_colour) { .red = 0xff, .blue = 0xff };
44 out[1] = colour->green;
45 out[2] = colour->blue;
46 out[3] = -1; /* opaque */
49 int render_to_pixbuf(LBXimg *image, GdkPixbuf *pixbuf, unsigned frame)
51 unsigned char **framedata, **framemask, *outbuf;
52 struct lbx_imginfo info;
55 lbx_img_getinfo(image, &info);
56 assert(info.width == gdk_pixbuf_get_width(pixbuf));
57 assert(info.height == gdk_pixbuf_get_height(pixbuf));
59 framedata = lbx_img_getframe(image, frame);
60 g_return_val_if_fail(framedata, -1);
61 framemask = lbx_img_getmask(image);
63 outbuf = gdk_pixbuf_get_pixels(pixbuf);
64 stride = gdk_pixbuf_get_rowstride(pixbuf);
66 for (unsigned i = 0; i < info.height; i++) {
67 unsigned char (*px)[4] = (void *)(outbuf + i*stride);
69 for (unsigned j = 0; j < info.width; j++) {
71 get_colour(framedata[i][j], px[j]);
73 px[j][3] = 0; /* transparent */