+++ /dev/null
-/* -*- Mode: C; tab-width: 4 -*- */
-/* mountain -- square grid mountains */
-
-#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)mountain.c 4.04 97/07/28 xlockmore";
-
-#endif
-
-/*-
- * Copyright (c) 1995 Pascal Pensa <pensa@aurora.unice.fr>
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation.
- *
- * This file is provided AS IS with no warranties of any kind. The author
- * shall have no liability with respect to the infringement of copyrights,
- * trade secrets or any patents by this file or any part thereof. In no
- * event will the author be liable for any lost revenue or profits or
- * other special, indirect and consequential damages.
- *
- * Revision History:
- * 10-May-97: Compatible with xscreensaver
- */
-
-#ifdef STANDALONE
-# define PROGCLASS "Mountain"
-# define HACK_INIT init_mountain
-# define HACK_DRAW draw_mountain
-# define mountain_opts xlockmore_opts
-# define DEFAULTS "*delay: 0 \n" \
- "*count: 30 \n" \
- "*cycles: 100 \n" \
- "*ncolors: 64 \n"
-# define SMOOTH_COLORS
-#include "xlockmore.h" /* in xscreensaver distribution */
-#else /* STANDALONE */
-#include "xlock.h" /* in xlockmore distribution */
-#endif /* STANDALONE */
-
-ModeSpecOpt mountain_opts =
-{0, NULL, 0, NULL, NULL};
-
-/* ~ 5000 Max mountain height (1000 - 10000) */
-#define MAXHEIGHT (3 * (mp->width + mp->height))
-
-#define WORLDWIDTH 50 /* World size x * y */
-
-#define RANGE_RAND(min,max) ((min) + NRAND((max) - (min)))
-
-typedef struct {
- int pixelmode;
- int width;
- int height;
- int x, y;
- int offset;
- int stage;
- int h[WORLDWIDTH][WORLDWIDTH];
- int time; /* up time */
- int first;
- GC stippled_GC;
-} mountainstruct;
-
-static mountainstruct *mountains = NULL;
-
-static void
-spread(int (*m)[50], int x, int y)
-{
- int x2, y2;
- int h = m[x][y];
-
- for (y2 = y - 1; y2 <= y + 1; y2++)
- for (x2 = x - 1; x2 <= x + 1; x2++)
- if (x2 >= 0 && y2 >= 0 && x2 < WORLDWIDTH && y2 < WORLDWIDTH)
- m[x2][y2] = (m[x2][y2] + h) / 2;
-}
-
-static void
-drawamountain(ModeInfo * mi)
-{
- Display *display = MI_DISPLAY(mi);
- Window window = MI_WINDOW(mi);
- GC gc = MI_GC(mi);
- mountainstruct *mp = &mountains[MI_SCREEN(mi)];
- int x2, y2, x3, y3, y4, y5, c = 0;
- XPoint p[5];
-
- if (MI_NPIXELS(mi) > 2) {
- c = (mp->h[mp->x][mp->y] + mp->h[mp->x + 1][mp->y] +
- mp->h[mp->x][mp->y + 1] + mp->h[mp->x + 1][mp->y + 1]) / 4;
- c = (c / 10 + mp->offset) % MI_NPIXELS(mi);
- }
- x2 = mp->x * (2 * mp->width) / (3 * WORLDWIDTH);
- y2 = mp->y * (2 * mp->height) / (3 * WORLDWIDTH);
- p[0].x = (x2 - y2 / 2) + (mp->width / 4);
- p[0].y = (y2 - mp->h[mp->x][mp->y]) + mp->height / 4;
-
- x3 = (mp->x + 1) * (2 * mp->width) / (3 * WORLDWIDTH);
- y3 = mp->y * (2 * mp->height) / (3 * WORLDWIDTH);
- p[1].x = (x3 - y3 / 2) + (mp->width / 4);
- p[1].y = (y3 - mp->h[mp->x + 1][mp->y]) + mp->height / 4;
-
- y4 = (mp->y + 1) * (2 * mp->height) / (3 * WORLDWIDTH);
- p[2].x = (x3 - y4 / 2) + (mp->width / 4);
- p[2].y = (y4 - mp->h[mp->x + 1][mp->y + 1]) + mp->height / 4;
-
- y5 = (mp->y + 1) * (2 * mp->height) / (3 * WORLDWIDTH);
- p[3].x = (x2 - y5 / 2) + (mp->width / 4);
- p[3].y = (y5 - mp->h[mp->x][mp->y + 1]) + mp->height / 4;
-
- p[4].x = p[0].x;
- p[4].y = p[0].y;
-
- if (MI_NPIXELS(mi) > 2)
- XSetForeground(display, gc, MI_PIXEL(mi, c));
- else
- XSetForeground(display, gc, MI_WIN_WHITE_PIXEL(mi));
- XFillPolygon(display, window, gc, p, 4, Complex, CoordModeOrigin);
-
- if (!mp->pixelmode) {
- XSetForeground(display, gc, MI_WIN_BLACK_PIXEL(mi));
- XDrawLines(display, window, gc, p, 5, CoordModeOrigin);
- }
- mp->x++;
- if (mp->x == WORLDWIDTH - 1) {
- mp->y++;
- mp->x = 0;
- }
- if (mp->y == WORLDWIDTH - 1)
- mp->stage++;
-}
-
-void
-init_mountain(ModeInfo * mi)
-{
- mountainstruct *mp;
- int i, j, x, y;
- XGCValues gcv;
-
- if (mountains == NULL) {
- if ((mountains = (mountainstruct *) calloc(MI_NUM_SCREENS(mi),
- sizeof (mountainstruct))) == NULL)
- return;
- }
- mp = &mountains[MI_SCREEN(mi)];
- mp->width = MI_WIN_WIDTH(mi);
- mp->height = MI_WIN_HEIGHT(mi);
- mp->pixelmode = (mp->width + mp->height < 200);
- mp->stage = 0;
- mp->time = 0;
- mp->x = mp->y = 0;
- if (!mp->first) {
- mp->first = 1;
- gcv.foreground = MI_WIN_WHITE_PIXEL(mi);
- gcv.background = MI_WIN_BLACK_PIXEL(mi);
-
- mp->stippled_GC = XCreateGC(MI_DISPLAY(mi), MI_WINDOW(mi),
- GCForeground | GCBackground, &gcv);
- }
- XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
-
- for (y = 0; y < WORLDWIDTH; y++)
- for (x = 0; x < WORLDWIDTH; x++)
- mp->h[x][y] = 0;
-
- j = MI_BATCHCOUNT(mi);
- if (j < 0)
- j = NRAND(-j) + 1;
- for (i = 0; i < j; i++)
- mp->h[RANGE_RAND(1, WORLDWIDTH - 1)][RANGE_RAND(1, WORLDWIDTH - 1)] =
- NRAND(MAXHEIGHT);
-
- for (y = 0; y < WORLDWIDTH; y++)
- for (x = 0; x < WORLDWIDTH; x++)
- spread(mp->h, x, y);
-
- for (y = 0; y < WORLDWIDTH; y++)
- for (x = 0; x < WORLDWIDTH; x++) {
- mp->h[x][y] = mp->h[x][y] + NRAND(10) - 5;
- if (mp->h[x][y] < 10)
- mp->h[x][y] = 0;
- }
-
- if (MI_NPIXELS(mi) > 2)
- mp->offset = NRAND(MI_NPIXELS(mi));
- else
- mp->offset = 0;
-}
-
-void
-draw_mountain(ModeInfo * mi)
-{
- mountainstruct *mp = &mountains[MI_SCREEN(mi)];
-
- switch (mp->stage) {
- case 0:
- drawamountain(mi);
- break;
- case 1:
- MI_PAUSE(mi) = 2000000;
- /*if (++mp->time > MI_CYCLES(mi)); */
- mp->stage++;
- break;
- case 2:
- init_mountain(mi);
- break;
- }
-}
-
-void
-release_mountain(ModeInfo * mi)
-{
- if (mountains != NULL) {
- int screen;
-
- for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
- mountainstruct *mp = &mountains[screen];
-
- XFreeGC(MI_DISPLAY(mi), mp->stippled_GC);
- }
- (void) free((void *) mountains);
- mountains = NULL;
- }
-}
-
-void
-refresh_mountain(ModeInfo * mi)
-{
- mountainstruct *mp = &mountains[MI_SCREEN(mi)];
-
- mp->x = 0;
- mp->y = 0;
-}
projects / xscreensaver / blobdiff