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author | Simon Rettberg | 2018-10-16 10:08:48 +0200 |
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committer | Simon Rettberg | 2018-10-16 10:08:48 +0200 |
commit | d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 (patch) | |
tree | cbddf8e50f35a9c6e878a5bfe3c6d625d99e12ba /hacks/forest.c | |
download | xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.tar.gz xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.tar.xz xscreensaver-d3a98cf6cbc3bd0b9efc570f58e8812c03931c18.zip |
Original 5.40
Diffstat (limited to 'hacks/forest.c')
-rw-r--r-- | hacks/forest.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/hacks/forest.c b/hacks/forest.c new file mode 100644 index 0000000..38a480d --- /dev/null +++ b/hacks/forest.c @@ -0,0 +1,244 @@ +/* forest.c (aka xtree.c), Copyright (c) 1999 + * Peter Baumung <unn6@rz.uni-karlsruhe.de> + * + * Most code taken from + * xscreensaver, Copyright (c) 1992, 1995, 1997 + * Jamie Zawinski <jwz@netscape.com> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation. No representations are made about the suitability of this + * software for any purpose. It is provided "as is" without express or + * implied warranty. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +/* ****************************** NOTE ****************************** + + This is not the xlockmore version of forest, but a much better + looking rewrite. Be careful not to delete it in a merging frenzy... + + ********************************************************************** + */ + +#ifdef STANDALONE +# define DEFAULTS "*delay: 500000 \n" \ + "*ncolors: 20 \n" \ + "*fpsSolid: true \n" \ + +# include "xlockmore.h" /* from the xscreensaver distribution */ +# define free_trees 0 +# define release_trees 0 +# define reshape_trees 0 +# define trees_handle_event 0 +#else /* !STANDALONE */ +# include "xlock.h" /* from the xlockmore distribution */ +#endif /* !STANDALONE */ + +ENTRYPOINT ModeSpecOpt trees_opts = {0, NULL, 0, NULL, NULL}; + +typedef struct { + int x; + int y; + int thick; + double size; + long color; + int toDo; + int pause; + int season; +} treestruct; + +static treestruct *trees = NULL; + +static XColor colors[20]; +static int color; + +static long colorM[12] = {0xff0000, 0xff8000, 0xffff00, 0x80ff00, + 0x00ff00, 0x00ff80, 0x00ffff, 0x0080ff, + 0x0000ff, 0x8000ff, 0xff00ff, 0xff0080}; + +static long colorV[12] = {0x0a0000, 0x0a0500, 0x0a0a00, 0x050a00, + 0x000a00, 0x000a05, 0x000a0a, 0x00050a, + 0x00000a, 0x05000a, 0x0a000a, 0x0a0005}; + +ENTRYPOINT void +init_trees(ModeInfo * mi) +{ + treestruct *tree; + Display *display = MI_DISPLAY(mi); + GC gc = MI_GC(mi); + int i; + + if (trees == NULL) { + + if (mi->npixels > 20) { + printf("%d colors selected. Setting limit to 20...\n", mi->npixels); + mi->npixels = 20; + } + + if (mi->npixels < 4) { + for (i = 0; i < mi->npixels; i++) { + colors[i].red = 65535 * (i & 1); + colors[i].green = 65535 * (i & 1); + colors[i].blue = 65535 * (i & 1); + colors[i].flags = DoRed | DoGreen | DoBlue; + } + } else { + if (mi->npixels < 8) { + for (i = 0; i < mi->npixels; i++) { + colors[i].red = 32768 + 4096 * (i % 4); + colors[i].green = 32768 + 4096 * (i % 4); + colors[i].blue = 32768 + 4096 * (i % 4); + colors[i].flags = DoRed | DoGreen | DoBlue; + } + } else { + for (i = 0; i < mi->npixels; i++) { + colors[i].red = 24576 + 4096 * (i % 4); + colors[i].green = 10240 + 2048 * (i % 4); + colors[i].blue = 0; + colors[i].flags = DoRed | DoGreen | DoBlue; + } + } + } + + for (i = 0; i < mi->npixels; i++) + if (!XAllocColor(display, mi->xgwa.colormap, &colors[i])) break; + color = i; + + XSetForeground(display, gc, colors[1].pixel); + } + + MI_INIT (mi, trees); + + XClearWindow(display, MI_WINDOW(mi)); + XSetLineAttributes(display, gc, 2, LineSolid, CapButt, JoinMiter); + tree = &trees[MI_SCREEN(mi)]; + tree->toDo = 25; + tree->season = NRAND(12); + + for (i = 4; i < mi->npixels; i++) { + int sIndex = (tree->season + (i-4) / 4) % 12; + long color = colorM[sIndex] - 2 * colorV[sIndex] * (i % 4); + colors[i].red = (color & 0xff0000) / 256; + colors[i].green = (color & 0x00ff00); + colors[i].blue = (color & 0x0000ff) * 256; + colors[i].flags = DoRed | DoGreen | DoBlue; + } + + for (i = 0; i < mi->npixels; i++) + if (!XAllocColor(display, mi->xgwa.colormap, &colors[i])) break; + + color = i; +} + +static double rRand(double a, double b) +{ + return (a+(b-a)*NRAND(10001)/10000.0); +} + +static void draw_line(ModeInfo * mi, + int x1, int y1, int x2, int y2, + double angle, int widths, int widthe) +{ + + Display *display = MI_DISPLAY(mi); + GC gc = MI_GC(mi); + double sns = 0.5*widths*sin(angle + M_PI_2); + double css = 0.5*widths*cos(angle + M_PI_2); + double sne = 0.5*widthe*sin(angle + M_PI_2); + double cse = 0.5*widthe*cos(angle + M_PI_2); + + int xs1 = (int) (x1-sns); + int xs2 = (int) (x1+sns); + int ys1 = (int) (y1-css); + int ys2 = (int) (y1+css); + int xe1 = (int) (x2-sne); + int xe2 = (int) (x2+sne); + int ye1 = (int) (y2-cse); + int ye2 = (int) (y2+cse); + int i; + + for (i = 0; i < widths; i++) { + if (color >= 4) + XSetForeground(display, gc, colors[i*4/widths].pixel); + XDrawLine(display, MI_WINDOW(mi), gc, + xs1+(xs2-xs1)*i/widths, ys1+(ys2-ys1)*i/widths, + xe1+(xe2-xe1)*i/widths, ye1+(ye2-ye1)*i/widths); + } +} + +static void draw_tree_rec(ModeInfo * mi, double thick, int x, int y, double angle) +{ + treestruct *tree = &trees[MI_SCREEN(mi)]; + Display *display = MI_DISPLAY(mi); + GC gc = MI_GC(mi); + int length = (24+NRAND(12))*tree->size; + int a = (int) (x - length*sin(angle)); + int b = (int) (y - length*cos(angle)); + int i; + + draw_line(mi, x, y, a, b, angle, thick*tree->size, 0.68*thick*tree->size); + + if (thick > 2) { + draw_tree_rec(mi, 0.68*thick, a, b, 0.8*angle+rRand(-0.2, 0.2)); + if (thick < tree->thick-1) { + draw_tree_rec(mi, 0.68*thick, a, b, angle+rRand(0.2, 0.9)); + draw_tree_rec(mi, 0.68*thick, (a+x)/2, (b+y)/2, angle-rRand(0.2, 0.9)); + } + } + + if (thick < 0.5*tree->thick) { + int nleaf = 12 + NRAND(4); + XArc leaf[16]; + for (i = 0; i < nleaf; i++) { + leaf[i].x = a + (int) (tree->size * rRand(-12, 12)); + leaf[i].y = b + (int) (tree->size * rRand(-12, 12)); + leaf[i].width = (int) (tree->size * rRand(2, 6)); + leaf[i].height = leaf[i].width; + leaf[i].angle1 = 0; + leaf[i].angle2 = 360 * 64; + } + if (mi->npixels >= 4) + XSetForeground(display, gc, colors[tree->color+NRAND(4)].pixel); + XFillArcs(display, MI_WINDOW(mi), gc, leaf, nleaf); + } +} + +ENTRYPOINT void +draw_trees(ModeInfo * mi) +{ + treestruct *tree = &trees[MI_SCREEN(mi)]; + int width = MI_WIN_WIDTH(mi); + int height = MI_WIN_HEIGHT(mi); + + if (tree->pause == 1) { + tree->pause--; + init_trees(mi); + } else if (tree->pause > 1) { + tree->pause--; + return; + } else if (--(tree->toDo) == 0) { + tree->pause = 6; + return; + } + + tree->x = NRAND(width); + tree->y = (int) (1.25 * height * (1 - tree->toDo / 23.0)); + tree->thick = rRand(7, 12); + tree->size = height / 480.0; + if (color < 8) { + tree->color = 0; + } else { + tree->color = 4 * (1 + NRAND(color / 4 - 1)); + } + + draw_tree_rec(mi, tree->thick, tree->x, tree->y, rRand(-0.1, 0.1)); +} + + +XSCREENSAVER_MODULE_2 ("Forest", forest, trees) |