104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
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/*
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* brad forschinger, 19990504
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* <retch@flag.blackened.net>
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*
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* written with much help from warp_saver.c
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/syslog.h>
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#include <machine/md_var.h>
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#include <machine/random.h>
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#include <saver.h>
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#define X_SIZE 320
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#define Y_SIZE 200
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int blanked;
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u_char fire_pal[768];
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u_char buf[X_SIZE * (Y_SIZE + 1)];
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int fire_saver(video_adapter_t *adp, int blank) {
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static u_char *vid;
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int x, y;
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if (blank) {
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if (blanked <= 0) {
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int red, green, blue;
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int palette_index;
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set_video_mode(adp, M_VGA_CG320);
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/* build palette */
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red = green = blue = 0;
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for (palette_index = 0; palette_index < 256; palette_index++) {
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red++;
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if (red > 128)
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green += 2;
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fire_pal[(palette_index * 3) + 0] = red;
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fire_pal[(palette_index * 3) + 1] = green;
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fire_pal[(palette_index * 3) + 2] = blue;
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}
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load_palette(adp, fire_pal);
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blanked++;
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vid = (u_char *)adp->va_window;
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}
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/* make a new bottom line */
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for (x = 0, y = Y_SIZE; x < X_SIZE; x++)
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buf[x + (y * X_SIZE)] = random() % 160 + 96;
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/* fade the flames out */
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for (y = 0; y < Y_SIZE; y++) {
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for (x = 0; x < X_SIZE; x++) {
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buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] +
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buf[(x - 1) + ((y + 1) * X_SIZE)] +
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buf[(x + 0) + ((y + 1) * X_SIZE)] +
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buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4;
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if (buf[x + (y * X_SIZE)] > 0)
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buf[x + (y * X_SIZE)]--;
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}
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}
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/* put our buffer into video ram */
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memcpy(vid, buf, X_SIZE * Y_SIZE);
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} else {
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blanked = 0;
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}
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return(0);
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}
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int fire_initialise(video_adapter_t *adp) {
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video_info_t info;
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if (get_mode_info(adp, M_VGA_CG320, &info)) {
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log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n");
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return(ENODEV);
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}
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blanked = 0;
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return(0);
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}
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int fire_terminate(video_adapter_t *adp) {
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return(0);
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}
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static scrn_saver_t fire_module = {
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"fire_saver", fire_initialise, fire_terminate, fire_saver, NULL
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};
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SAVER_MODULE(fire_saver, fire_module);
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