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/>.
27 /* LBX images can have up to three palettes, with each superseding the last. */
28 struct lbx_colour palette_external[256];
29 struct lbx_colour palette_internal[256];
30 struct lbx_colour palette_override[256];
32 static inline unsigned scale6to8(unsigned x)
39 static void get_colour(unsigned char index, unsigned char out[static 4])
41 struct lbx_colour *colour;
43 if (palette_override[index].active)
44 colour = palette_override + index;
45 else if (palette_internal[index].active)
46 colour = palette_internal + index;
47 else if (palette_external[index].active)
48 colour = palette_external + index;
50 colour = &(struct lbx_colour) { .red = 0x3f, .blue = 0x3f };
52 out[0] = scale6to8(colour->red);
53 out[1] = scale6to8(colour->green);
54 out[2] = scale6to8(colour->blue);
55 out[3] = -1; /* opaque */
58 int render_to_pixbuf(struct lbx_image *image, GdkPixbuf *pixbuf, unsigned frame)
60 unsigned char **framedata, **framemask, *outbuf;
63 assert(image->width == gdk_pixbuf_get_width(pixbuf));
64 assert(image->height == gdk_pixbuf_get_height(pixbuf));
66 framedata = lbx_img_getframe(image, frame);
67 g_return_val_if_fail(framedata, -1);
68 framemask = lbx_img_getmask(image);
70 outbuf = gdk_pixbuf_get_pixels(pixbuf);
71 stride = gdk_pixbuf_get_rowstride(pixbuf);
73 for (unsigned i = 0; i < image->height; i++) {
74 unsigned char (*px)[4] = (void *)(outbuf + i*stride);
76 for (unsigned j = 0; j < image->width; j++) {
78 get_colour(framedata[i][j], px[j]);
80 px[j][3] = 0; /* transparent */