1 /* -*- Mode: C; tab-width: 4 -*- */
2 /* vim: set ai ts=4 sw=4: */
5 /*static const char sccsid[] = "@(#)gleidescope.c 1.0 03/06/27 xlockmore";*/
8 /* enable -grab switch for animations */
11 #undef DISPLAY_TEXTURE
14 * Permission to use, copy, modify, and distribute this software and its
15 * documentation for any purpose and without fee is hereby granted,
16 * provided that the above copyright notice appear in all copies and that
17 * both that copyright notice and this permission notice appear in
18 * supporting documentation.
20 * This file is provided AS IS with no warranties of any kind. The author
21 * shall have no liability with respect to the infringement of copyrights,
22 * trade secrets or any patents by this file or any part thereof. In no
23 * event will the author be liable for any lost revenue or profits or
24 * other special, indirect and consequential damages.
28 * 20030627 1.0 acd First Release.
29 * Texture loading code from 'glplanet'
30 * by Jamie Zawinski <jwz@jwz.org>
31 * 20030810 1.1 acd Added size flag.
32 * Now grabs screen / video / picture
33 * (uses code from 'glslideshow' by
34 * Mike Oliphant, Ben Buxton, Jamie Zawinski).
37 * Added fade code (also from glslideshow).
38 * 20031013 1.2 acd Migrated to compile without warnings under
40 * 20031023 1.3 acd Better code to limit twisting speeds.
41 * Tweaked initial rotation values.
42 * Move, Rotate, Zoom now chosen at random if
43 * no preference is given.
44 * Made grid slightly bigger so you can't see
45 * the edge when zooming and moving.
46 * 20061226 1.4 acd Now uses GL Display Lists.
47 * 20070318 1.5 acd Generates textures.
48 * Fixed texture size problem (and introduced another).
49 * 20070412 1.6 acd Textures now have independant sizes.
50 * 20070413 1.7 acd Added Lissajous movement pattern.
51 * 20070414 1.8 acd Added corners movement pattern.
52 * 20080319 1.9 acd Changes to arguments for saner gleidescope.xml.
55 * generate textures myself - render random shapes to 256x256 texture. (done)
56 * lower res for checks and random - use 256 and 4x4 or 8x8 pixels. (disabled for now)
57 * gnome-saver doesn't let you specify source directory so add that to this.
58 * image loading routine is too slow - rotation grinds to a halt - stop using it. (better in version 5)
59 * image loading also looks bad for non-square images - edges are black. (fixed)
60 * possible to see edge of the world on widescreen terminals - use larger grid and hidden hex removal?
61 * fading textures may have different max_tx - use two sets. (done)
62 * choice of movement patterns. (3 implemented, chooseable at compile time)
63 * look into rangle and tangle.
67 **----------------------------------------------------------------------------
69 **----------------------------------------------------------------------------
75 "*showFPS: False \n" \
79 # define refresh_gleidescope 0
80 # include "xlockmore.h" /* from the xscreensaver distribution */
81 #else /* !STANDALONE */
82 # include "xlock.h" /* from the xlockmore distribution */
83 #endif /* !STANDALONE */
88 #include "xpm-ximage.h"
89 #include "grab-ximage.h"
92 void grab_frame(Display *display, Window window);
95 /* acd TODO should all these be in gleidestruct? */
96 /* they can't be, because of the idiotic way the xlockmore "argtype vars"
97 interface works. -jwz */
99 static Bool grab; /* grab images */
101 static Bool move; /* moving camera */
102 static Bool nomove; /* no moving camera */
103 static Bool rotate; /* rotate in place */
104 static Bool norotate; /* no rotate in place */
105 static Bool zoom; /* zooming camera */
106 static Bool nozoom; /* no zooming camera */
107 static char *image; /* name of texture to load */
108 static int duration; /* length of time to display grabbed image */
110 #define MAX_CAM_SPEED 1.0
111 #define MAX_ANGLE_VEL 1.0
112 #define INITIAL_ANGLE_VEL 0.2
113 #define INITIAL_ANGLE_ACC 0.001
114 #define TWISTING_PROBABILITY 1000 /* 1 in ... of change of acceleration */
116 #define RADIANS (M_PI / 180)
117 #define ANGLE_120 (M_PI * 2 / 3)
118 #define ANGLE_240 (M_PI * 4 / 3)
120 #define DEF_GRAB "False"
121 #define DEF_MOVE "False"
122 #define DEF_NOMOVE "False"
123 #define DEF_ROTATE "False"
124 #define DEF_NOROTATE "False"
125 #define DEF_ZOOM "False"
126 #define DEF_NOZOOM "False"
127 #define DEF_IMAGE "DEFAULT"
128 #define DEF_DURATION "30"
131 static XrmOptionDescRec opts[] =
134 {"-grab", ".gleidescope.grab", XrmoptionNoArg, "true"},
136 {"-move", ".gleidescope.move", XrmoptionNoArg, "true"},
137 {"-no-move", ".gleidescope.nomove", XrmoptionNoArg, "true"},
138 {"-rotate", ".gleidescope.rotate", XrmoptionNoArg, "true"},
139 {"-no-rotate", ".gleidescope.norotate", XrmoptionNoArg, "true"},
140 {"-zoom", ".gleidescope.zoom", XrmoptionNoArg, "true"},
141 {"-no-zoom", ".gleidescope.nozoom", XrmoptionNoArg, "true"},
142 {"-image", ".gleidescope.image", XrmoptionSepArg, "DEFAULT"},
143 {"-duration", ".gleidescope.duration", XrmoptionSepArg, "30"},
147 static argtype vars[] = {
149 {&grab, "grab", "Grab", DEF_GRAB, t_Bool},
151 {&move, "move", "Move", DEF_MOVE, t_Bool},
152 {&nomove, "nomove", "noMove", DEF_NOMOVE, t_Bool},
153 {&rotate, "rotate", "Rotate", DEF_ROTATE, t_Bool},
154 {&norotate, "norotate", "noRotate", DEF_NOROTATE, t_Bool},
155 {&zoom, "zoom", "Zoom", DEF_ZOOM, t_Bool},
156 {&nozoom, "nozoom", "noZoom", DEF_NOZOOM, t_Bool},
157 {&image, "image", "Image", DEF_IMAGE, t_String},
158 {&duration, "duration", "Duration", DEF_DURATION, t_Int},
161 static OptionStruct desc[] = {
163 {"-grab", "grab images to create animation"},
165 {"-move", "camera will move"},
166 {"-no-move", "camera won't move"},
167 {"-rotate", "camera will rotate"},
168 {"-no-rotate", "camera won't rotate"},
169 {"-zoom", "camera will zoom"},
170 {"-no-zoom", "camera won't zoom"},
171 {"-image", "xpm / xbm image file to use for texture"},
172 {"-duration", "length of time texture will be used"},
175 ENTRYPOINT ModeSpecOpt gleidescope_opts = {
176 sizeof opts / sizeof opts[0], opts,
177 sizeof vars / sizeof vars[0], vars,
182 ModStruct gleidescope_description = {
183 "gleidescope", "init_gleidescope", "draw_gleidescope", "release_gleidescope",
184 "draw_gleidescope", "init_gleidescope", NULL, &gleidescope_opts,
185 1000, 1, 2, 1, 4, 1.0, "",
186 "GL Kaleidescope", 0, NULL};
190 **-----------------------------------------------------------------------------
192 **-----------------------------------------------------------------------------
195 typedef struct hex_s {
196 GLfloat x, y, z; /* position */
211 GLuint id; /* opengl texture id */
212 GLfloat width, height; /* texture width and height */
213 GLfloat min_tx, min_ty; /* minimum texture sizes */
214 GLfloat max_tx, max_ty; /* maximum texture sizes */
218 Bool waiting_for_image_p;
219 /* r_phase is for triangle rotation speed */
220 GLfloat x_period, y_period, r_period;
221 GLfloat x_phase, y_phase, r_phase;
224 #define MAX_FADE 500 /* number of fade cycles */
227 float cam_x_speed, cam_z_speed, cam_y_speed;
228 int cam_x_phase, cam_z_phase, cam_y_phase;
230 GLXContext *glx_context;
232 texture textures[2]; /* texture handles */
233 GLuint visible; /* index for current texture */
241 float tangle; /* texture angle (degrees) */
242 float tangle_vel; /* texture velocity */
243 float tangle_acc; /* texture acceleration */
245 float rangle; /* rotate angle */
246 float rangle_vel; /* rotate velocity */
247 float rangle_acc; /* rotate acceleration */
256 Bool waiting_for_image_p;
260 #define frandrange(x, y) (x + frand(y - x))
262 #define XOFFSET (0.8660254f) /* sin 60' */
263 #define YOFFSET (1.5000000f) /* cos 60' + 1 */
269 /* generates a grid with edges of given size */
270 /* acd TODO - replace hex[] with this and allow size and distance as parameters */
273 generate_grid(int size)
280 for (y = -size ; y <= size ; y++) {
281 for (x = -i ; x <= i ; x += 2) {
282 printf("{XOFFSET * %d, YOFFSET * %d, 0},\n", x, y);
295 /* acd - this is terrible - 120+ hexes */
296 static const hex_t hex[] = {
297 /* edges of size 7 */
298 /* number of hexagons required to cover screen depends on camera distance */
299 /* at a distance of 10 this is just about enough. */
300 {XOFFSET * -6, YOFFSET * -6, 0},
301 {XOFFSET * -4, YOFFSET * -6, 0},
302 {XOFFSET * -2, YOFFSET * -6, 0},
303 {XOFFSET * 0, YOFFSET * -6, 0},
304 {XOFFSET * 2, YOFFSET * -6, 0},
305 {XOFFSET * 4, YOFFSET * -6, 0},
306 {XOFFSET * 6, YOFFSET * -6, 0},
308 {XOFFSET * -7, YOFFSET * -5, 0},
309 {XOFFSET * -5, YOFFSET * -5, 0},
310 {XOFFSET * -3, YOFFSET * -5, 0},
311 {XOFFSET * -1, YOFFSET * -5, 0},
312 {XOFFSET * 1, YOFFSET * -5, 0},
313 {XOFFSET * 3, YOFFSET * -5, 0},
314 {XOFFSET * 5, YOFFSET * -5, 0},
315 {XOFFSET * 7, YOFFSET * -5, 0},
317 {XOFFSET * -8, YOFFSET * -4, 0},
318 {XOFFSET * -6, YOFFSET * -4, 0},
319 {XOFFSET * -4, YOFFSET * -4, 0},
320 {XOFFSET * -2, YOFFSET * -4, 0},
321 {XOFFSET * 0, YOFFSET * -4, 0},
322 {XOFFSET * 2, YOFFSET * -4, 0},
323 {XOFFSET * 4, YOFFSET * -4, 0},
324 {XOFFSET * 6, YOFFSET * -4, 0},
325 {XOFFSET * 8, YOFFSET * -4, 0},
327 {XOFFSET * -9, YOFFSET * -3, 0},
328 {XOFFSET * -7, YOFFSET * -3, 0},
329 {XOFFSET * -5, YOFFSET * -3, 0},
330 {XOFFSET * -3, YOFFSET * -3, 0},
331 {XOFFSET * -1, YOFFSET * -3, 0},
332 {XOFFSET * 1, YOFFSET * -3, 0},
333 {XOFFSET * 3, YOFFSET * -3, 0},
334 {XOFFSET * 5, YOFFSET * -3, 0},
335 {XOFFSET * 7, YOFFSET * -3, 0},
336 {XOFFSET * 9, YOFFSET * -3, 0},
338 {XOFFSET * -10, YOFFSET * -2, 0},
339 {XOFFSET * -8, YOFFSET * -2, 0},
340 {XOFFSET * -6, YOFFSET * -2, 0},
341 {XOFFSET * -4, YOFFSET * -2, 0},
342 {XOFFSET * -2, YOFFSET * -2, 0},
343 {XOFFSET * 0, YOFFSET * -2, 0},
344 {XOFFSET * 2, YOFFSET * -2, 0},
345 {XOFFSET * 4, YOFFSET * -2, 0},
346 {XOFFSET * 6, YOFFSET * -2, 0},
347 {XOFFSET * 8, YOFFSET * -2, 0},
348 {XOFFSET * 10, YOFFSET * -2, 0},
350 {XOFFSET * -11, YOFFSET * -1, 0},
351 {XOFFSET * -9, YOFFSET * -1, 0},
352 {XOFFSET * -7, YOFFSET * -1, 0},
353 {XOFFSET * -5, YOFFSET * -1, 0},
354 {XOFFSET * -3, YOFFSET * -1, 0},
355 {XOFFSET * -1, YOFFSET * -1, 0},
356 {XOFFSET * 1, YOFFSET * -1, 0},
357 {XOFFSET * 3, YOFFSET * -1, 0},
358 {XOFFSET * 5, YOFFSET * -1, 0},
359 {XOFFSET * 7, YOFFSET * -1, 0},
360 {XOFFSET * 9, YOFFSET * -1, 0},
361 {XOFFSET * 11, YOFFSET * -1, 0},
363 {XOFFSET * -12, YOFFSET * 0, 0},
364 {XOFFSET * -10, YOFFSET * 0, 0},
365 {XOFFSET * -8, YOFFSET * 0, 0},
366 {XOFFSET * -6, YOFFSET * 0, 0},
367 {XOFFSET * -4, YOFFSET * 0, 0},
368 {XOFFSET * -2, YOFFSET * 0, 0},
369 {XOFFSET * 0, YOFFSET * 0, 0},
370 {XOFFSET * 2, YOFFSET * 0, 0},
371 {XOFFSET * 4, YOFFSET * 0, 0},
372 {XOFFSET * 6, YOFFSET * 0, 0},
373 {XOFFSET * 8, YOFFSET * 0, 0},
374 {XOFFSET * 10, YOFFSET * 0, 0},
375 {XOFFSET * 12, YOFFSET * 0, 0},
377 {XOFFSET * -11, YOFFSET * 1, 0},
378 {XOFFSET * -9, YOFFSET * 1, 0},
379 {XOFFSET * -7, YOFFSET * 1, 0},
380 {XOFFSET * -5, YOFFSET * 1, 0},
381 {XOFFSET * -3, YOFFSET * 1, 0},
382 {XOFFSET * -1, YOFFSET * 1, 0},
383 {XOFFSET * 1, YOFFSET * 1, 0},
384 {XOFFSET * 3, YOFFSET * 1, 0},
385 {XOFFSET * 5, YOFFSET * 1, 0},
386 {XOFFSET * 7, YOFFSET * 1, 0},
387 {XOFFSET * 9, YOFFSET * 1, 0},
388 {XOFFSET * 11, YOFFSET * 1, 0},
390 {XOFFSET * -10, YOFFSET * 2, 0},
391 {XOFFSET * -8, YOFFSET * 2, 0},
392 {XOFFSET * -6, YOFFSET * 2, 0},
393 {XOFFSET * -4, YOFFSET * 2, 0},
394 {XOFFSET * -2, YOFFSET * 2, 0},
395 {XOFFSET * 0, YOFFSET * 2, 0},
396 {XOFFSET * 2, YOFFSET * 2, 0},
397 {XOFFSET * 4, YOFFSET * 2, 0},
398 {XOFFSET * 6, YOFFSET * 2, 0},
399 {XOFFSET * 8, YOFFSET * 2, 0},
400 {XOFFSET * 10, YOFFSET * 2, 0},
402 {XOFFSET * -9, YOFFSET * 3, 0},
403 {XOFFSET * -7, YOFFSET * 3, 0},
404 {XOFFSET * -5, YOFFSET * 3, 0},
405 {XOFFSET * -3, YOFFSET * 3, 0},
406 {XOFFSET * -1, YOFFSET * 3, 0},
407 {XOFFSET * 1, YOFFSET * 3, 0},
408 {XOFFSET * 3, YOFFSET * 3, 0},
409 {XOFFSET * 5, YOFFSET * 3, 0},
410 {XOFFSET * 7, YOFFSET * 3, 0},
411 {XOFFSET * 9, YOFFSET * 3, 0},
413 {XOFFSET * -8, YOFFSET * 4, 0},
414 {XOFFSET * -6, YOFFSET * 4, 0},
415 {XOFFSET * -4, YOFFSET * 4, 0},
416 {XOFFSET * -2, YOFFSET * 4, 0},
417 {XOFFSET * 0, YOFFSET * 4, 0},
418 {XOFFSET * 2, YOFFSET * 4, 0},
419 {XOFFSET * 4, YOFFSET * 4, 0},
420 {XOFFSET * 6, YOFFSET * 4, 0},
421 {XOFFSET * 8, YOFFSET * 4, 0},
423 {XOFFSET * -7, YOFFSET * 5, 0},
424 {XOFFSET * -5, YOFFSET * 5, 0},
425 {XOFFSET * -3, YOFFSET * 5, 0},
426 {XOFFSET * -1, YOFFSET * 5, 0},
427 {XOFFSET * 1, YOFFSET * 5, 0},
428 {XOFFSET * 3, YOFFSET * 5, 0},
429 {XOFFSET * 5, YOFFSET * 5, 0},
430 {XOFFSET * 7, YOFFSET * 5, 0},
432 {XOFFSET * -6, YOFFSET * 6, 0},
433 {XOFFSET * -4, YOFFSET * 6, 0},
434 {XOFFSET * -2, YOFFSET * 6, 0},
435 {XOFFSET * 0, YOFFSET * 6, 0},
436 {XOFFSET * 2, YOFFSET * 6, 0},
437 {XOFFSET * 4, YOFFSET * 6, 0},
438 {XOFFSET * 6, YOFFSET * 6, 0},
442 **----------------------------------------------------------------------------
444 **----------------------------------------------------------------------------
447 static gleidestruct *gleidescope = NULL;
451 *load defaults in config structure
453 static void setdefaultconfig(void)
466 gleidescope_handle_event(ModeInfo *mi, XEvent *event)
468 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
471 printf("event:%d\n", event->xany.type);
472 printf("button:%d\n", event->xbutton.button);
474 if (event->xany.type == ButtonPress)
476 if (event->xbutton.button == Button1 ||
477 event->xbutton.button == Button3)
479 /* store initial values of mouse */
480 gp->xstart = event->xbutton.x;
481 gp->ystart = event->xbutton.y;
484 gp->button_down_p = True;
488 else if (event->xbutton.button == Button4)
493 else if (event->xbutton.button == Button5)
499 } else if (event->xany.type == ButtonRelease)
501 if (event->xbutton.button == Button1 ||
502 event->xbutton.button == Button3)
505 gp->button_down_p = False;
508 } else if (event->xany.type == MotionNotify)
510 if (gp->button_down_p)
512 /* update mouse position */
513 gp->xmouse += (double)(event->xmotion.x - gp->xstart) / MI_WIDTH(mi);
514 gp->ymouse += (double)(event->xmotion.y - gp->ystart) / MI_HEIGHT(mi);
515 gp->xstart = event->xmotion.x;
516 gp->ystart = event->xmotion.y;
521 else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event))
533 image_loaded_cb (const char *filename, XRectangle *geometry,
534 int image_width, int image_height,
535 int texture_width, int texture_height,
538 texture *tp = (texture *) closure;
541 gp->max_tx = (GLfloat) image_width / texture_width;
542 gp->max_ty = (GLfloat) image_height / texture_height;
545 /* new - taken from flipscreen */
546 tp->width = texture_width;
547 tp->height = texture_height;
548 tp->min_tx = (GLfloat) geometry->x / tp->width;
549 tp->min_ty = (GLfloat) geometry->y / tp->height;
550 tp->max_tx = (GLfloat) (geometry->x + geometry->width) / tp->width;
551 tp->max_ty = (GLfloat) (geometry->y + geometry->height) / tp->height;
554 printf("Image w,h: (%d, %d)\n", image_width, image_height);
555 printf("Texture w,h: (%d, %d)\n", texture_width, texture_height);
556 printf("Geom x,y: (%d, %d)\n", geometry->x, geometry->y);
557 printf("Geom w,h: (%d, %d)\n", geometry->width, geometry->height);
558 printf("Max Tx,Ty: (%f, %f)\n", tp->max_tx, tp->max_ty);
561 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
562 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
563 (tp->mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR));
565 tp->waiting_for_image_p = False;
566 tp->start_time = time ((time_t *) 0);
570 getSnapshot(ModeInfo *mi, texture *texture)
572 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
575 printf("getSnapshot");
578 if (MI_IS_WIREFRAME(mi))
582 load_texture_async (mi->xgwa.screen, mi->window,
583 *gp->glx_context, 0, 0, gp->mipmap_p,
584 texture->id, image_loaded_cb, texture);
585 texture->start_time = time((time_t *)0);
588 #define TEXTURE_SIZE 256
591 plot(unsigned char *buffer, int x, int y, int r, int g, int b, int a) {
593 if (x < 0 || x >= TEXTURE_SIZE || y < 0 || y >= TEXTURE_SIZE) {
596 c = ((x * TEXTURE_SIZE) + y) * 4;
597 /*printf("(%d,%d)[%d]\n", x, y, c);*/
606 plot2(unsigned char *buffer, int x, int y, int r, int g, int b, int a) {
608 if (x < 0 || x >= TEXTURE_SIZE || y < 0 || y >= TEXTURE_SIZE) {
611 c = ((x * TEXTURE_SIZE) + y) * 4;
612 /*printf("(%d,%d)[%d]\n", x, y, c);*/
618 if (y + 1 < TEXTURE_SIZE) {
625 if (x + 1 < TEXTURE_SIZE) {
626 c += (TEXTURE_SIZE * 4);
631 if (y + 1 < TEXTURE_SIZE) {
641 /* draw geometric shapes to texture */
642 /* modifies passed in buffer */
644 draw_shapes (unsigned char *buffer) {
651 for (i = 0 ; i < TEXTURE_SIZE * TEXTURE_SIZE * 4 ; i += 4) {
652 buffer[i + 0] = 0x00;
653 buffer[i + 1] = 0x00;
654 buffer[i + 2] = 0x00;
655 buffer[i + 3] = 0xff;
658 for (s = 0 ; s < 25 ; s++) {
659 int shape = random() % 3;
662 int r = (random() & 0xff);
663 int g = (random() & 0xff);
664 int b = (random() & 0xff);
669 x = (random() % TEXTURE_SIZE) - (TEXTURE_SIZE / 4); /* top left */
670 y = (random() % TEXTURE_SIZE) - (TEXTURE_SIZE / 4);
671 w = 10 + random() % (TEXTURE_SIZE / 4); /* size */
672 h = 10 + random() % (TEXTURE_SIZE / 4);
674 printf("Rectangle: (%d, %d)(%d, %d)\n", x, y, w, h);
682 for (i = x ; i < x + w && i < TEXTURE_SIZE; i++) {
683 for (j = y ; j < y + h && j < TEXTURE_SIZE; j++) {
684 plot(buffer, i, j, r, g, b, a);
691 x = random() % TEXTURE_SIZE; /* centre */
692 y = random() % TEXTURE_SIZE;
693 h = 10 + random() % (TEXTURE_SIZE / 8); /* radius */
695 printf("Circle: %d, %d, %d\n", x, y, h);
697 for (i = 0 ; i < h ; i++) {
699 for (j = 0 ; j < h ; j++) {
702 printf("xdist: %d\n", xdist);
703 printf("ydist: %d\n", ydist);
704 printf("radius: %d\n", h * h);
706 if ((xdist + ydist) < (h * h)) {
707 plot(buffer, x + i, y + j, r, b, g, a);
708 /* check we haven't already done these */
710 plot(buffer, x + i, y - j, r, b, g, a);
713 plot(buffer, x - i, y + j, r, b, g, a);
715 plot(buffer, x - i, y - j, r, b, g, a);
725 x = random() % TEXTURE_SIZE; /* top */
726 y = random() % TEXTURE_SIZE;
727 h = 10 + random() % (TEXTURE_SIZE / 4); /* height */
729 printf("Triangle: %d, %d, %d\n", x, y, h);
733 for (i = 0 ; i < h ; i++) {
734 for (j = left ; j < right ; j++) {
735 plot(buffer, j, y + i, r, g, b, a);
746 setup_random_texture (ModeInfo *mi, texture *texture)
748 int width = 0, height = 0;
750 unsigned char *my_data = NULL;
754 int r0, g0, b0, a0, r1, g1, b1, a1;
758 printf("RandomTexture\n");
761 /* use this texture */
762 glBindTexture(GL_TEXTURE_2D, texture->id);
767 * code for various generated patterns - noise, stripes, checks etc.
768 * random geometric shapes looked the best.
772 style = random() & 0x3;
773 r0 = random() & 0xff;
774 g0 = random() & 0xff;
775 b0 = random() & 0xff;
777 r1 = random() & 0xff;
778 g1 = random() & 0xff;
779 b1 = random() & 0xff;
785 height = width = TEXTURE_SIZE;
786 my_data = (void *)malloc(width * height * 4);
787 for (i = 0 ; i < width ; i += 2) {
788 for (j = 0 ; j < height ; j += 2) {
789 r0 = random() & 0xff;
790 g0 = random() & 0xff;
791 b0 = random() & 0xff;
793 plot2(my_data, i, j, r0, g0, b0, a0);
803 height = width = TEXTURE_SIZE;
804 my_data = (void *)malloc(width * height * 4);
805 draw_shapes(my_data);
811 height = width = TEXTURE_SIZE;
812 my_data = (void *)malloc(width * height * 4);
813 for (i = 0 ; i < height ; i += 2) {
814 for (j = 0 ; j < width ; j += 2) {
815 if (((i + j) & 0x3) == 0) {
816 plot2(my_data, i, j, r0, g0, b0, a0);
818 plot2(my_data, i, j, r1, g1, b1, a1);
824 case 3: /* random stripes */
825 printf("Stripes 2\n");
826 height = width = TEXTURE_SIZE;
827 my_data = (void *)malloc(width * height * 4);
828 for (i = 0 ; i < height ; i += 2) {
829 r0 = random() & 0xff;
830 g0 = random() & 0xff;
831 b0 = random() & 0xff;
833 for (j = 0 ; j < width ; j += 2) {
834 plot2(my_data, i, j, r0, g0, b0, a0);
841 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
843 GL_RGBA, GL_UNSIGNED_BYTE, my_data);
844 sprintf (buf, "random texture: (%dx%d)",
848 /* setup parameters for texturing */
849 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
850 glPixelStorei(GL_UNPACK_ROW_LENGTH, width);
852 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
853 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
854 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
855 if (random() & 0x1) {
856 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
857 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
859 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
860 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
863 if (my_data != NULL) {
868 /* use full texture */
870 texture->min_tx = 0.0;
871 texture->max_tx = 2.0;
872 texture->min_ty = 0.0;
873 texture->max_ty = 2.0;
874 texture->start_time = time((time_t *)0);
878 setup_file_texture (ModeInfo *mi, char *filename, texture *texture)
880 Display *dpy = mi->dpy;
881 Visual *visual = mi->xgwa.visual;
884 Colormap cmap = mi->xgwa.colormap;
885 XImage *image = xpm_file_to_ximage (dpy, visual, cmap, filename);
888 printf("FileTexture\n");
891 /* use this texture */
892 glBindTexture(GL_TEXTURE_2D, texture->id);
895 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
896 image->width, image->height, 0,
897 GL_RGBA, GL_UNSIGNED_BYTE, image->data);
898 sprintf (buf, "texture: %.100s (%dx%d)",
899 filename, image->width, image->height);
902 /* setup parameters for texturing */
903 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
904 glPixelStorei(GL_UNPACK_ROW_LENGTH, image->width);
906 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
907 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
908 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
909 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
910 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
912 /* use full texture */
913 texture->min_tx = 0.0;
914 texture->max_tx = 1.0;
915 texture->min_ty = 0.0;
916 texture->max_ty = 1.0;
917 texture->start_time = time((time_t *)0);
921 setup_texture(ModeInfo * mi, texture *texture)
923 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
925 if (!image || !*image || !strcmp(image, "DEFAULT")) {
926 /* no image specified - use system settings */
928 printf("SetupTexture: get_snapshot\n");
930 getSnapshot(mi, texture);
932 if (strcmp(image, "GENERATE") == 0) {
934 printf("SetupTexture: random_texture\n");
936 setup_random_texture(mi, texture);
938 /* use supplied image file */
940 printf("SetupTexture: file_texture\n");
942 setup_file_texture(mi, image, texture);
945 /* copy start time from texture */
946 gp->start_time = texture->start_time;
948 check_gl_error("texture initialization");
951 * resultant loaded image is upside down BUT
952 * it's a kaledescope and half of the hexagon is backwards anyway...
955 /* TODO: values for lissajous movement */
956 texture->x_period = frandrange(-2.0, 2.0);
957 texture->y_period = frandrange(-2.0, 2.0);
958 texture->r_period = frandrange(-2.0, 2.0);
959 texture->x_phase = frand(M_PI * 2);
960 texture->y_phase = frand(M_PI * 2);
961 texture->r_phase = frand(M_PI * 2);
963 printf("XPeriod %f XPhase %f\n", texture->x_period, texture->x_phase);
964 printf("YPeriod %f YPhase %f\n", texture->y_period, texture->y_phase);
965 printf("RPeriod %f RPhase %f\n", texture->r_period, texture->r_phase);
969 #define VERTEX0 glVertex3f( 0.0000f, 0.000f, 0.0f);
970 #define VERTEX1 glVertex3f( 0.0000f, 1.000f, 0.0f);
971 #define VERTEX2 glVertex3f( XOFFSET, 0.500f, 0.0f);
972 #define VERTEX3 glVertex3f( XOFFSET, -0.500f, 0.0f);
973 #define VERTEX4 glVertex3f( 0.0000f, -1.000f, 0.0f);
974 #define VERTEX5 glVertex3f(-XOFFSET, -0.500f, 0.0f);
975 #define VERTEX6 glVertex3f(-XOFFSET, 0.500f, 0.0f);
978 ** Three different functions for calculating texture coordinates
979 ** which modify how the texture triangle moves over the source image.
984 /* the classic equilateral triangle rotating around centre */
986 calculate_texture_coords(ModeInfo *mi, texture *texture, vector2f t[3]) {
988 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
989 GLfloat centre_x = 0.5;
990 GLfloat centre_y = 0.5;
991 GLfloat radius_x = (texture->max_tx - texture->min_tx) / 2;
992 GLfloat radius_y = (texture->max_ty - texture->min_ty) / 2;
998 t[1].x = centre_x + .95 * radius_x * cos((gp->ymouse * 2 * M_PI) + (gp->tangle * RADIANS));
999 t[1].y = centre_y + .95 * radius_y * sin((gp->ymouse * 2 * M_PI) + (gp->tangle * RADIANS));
1001 /* t[2] is always 60' further around than t2 */
1002 tangle2 = (gp->ymouse * 2 * M_PI) + (gp->tangle * RADIANS) + (M_PI * 2 / 6);
1003 t[2].x = centre_x + .95 * radius_x * cos(tangle2);
1004 t[2].y = centre_y + .95 * radius_y * sin(tangle2);
1006 printf("texcoords:[%f,%f]->[%f,%f](%f,%f)\n", t[0].x, t[0].y, t[1].x, t[1].y, texture->max_tx, texture->max_ty);
1012 /* new lissajous movement pattern */
1014 calculate_texture_coords(ModeInfo *mi, texture *texture, vector2f t[3]) {
1016 /* equilateral triangle rotating around centre */
1017 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1018 GLfloat width = texture->max_tx - texture->min_tx;
1019 GLfloat height = texture->max_ty - texture->min_ty;
1021 GLfloat centre_x = texture->min_tx + (width * .5);
1022 GLfloat centre_y = texture->min_ty + (height * .5);
1023 /* m radius and t radius should be = .5 */
1024 /* triangle radius is 30% available space */
1025 GLfloat t_radius_x = width * .3;
1026 GLfloat t_radius_y = height * .3;
1027 /* movement radius is 30% available space */
1028 GLfloat m_radius_x = width * .2;
1029 GLfloat m_radius_y = height * .2;
1032 /* centre of triangle */
1033 GLfloat angle = (gp->ymouse * 2 * M_PI) + (gp->tangle * RADIANS); /* to radians */
1034 GLfloat t_centre_x = centre_x + m_radius_x * cos(texture->x_period * angle + texture->x_phase);
1035 GLfloat t_centre_y = centre_y + m_radius_y * sin(texture->y_period * angle + texture->y_phase);
1038 printf("WH: %f, %f - tWH: %f, %f\n", width, height, texture->width, texture->height);
1039 printf("size: (%f, %f)\n", width, height);
1040 printf("centre: (%f, %f)\n", centre_x, centre_y);
1043 angle2 = texture->r_period * angle + texture->r_phase;
1044 t[0].x = t_centre_x + t_radius_x * cos(angle2);
1045 t[0].y = t_centre_y + t_radius_y * sin(angle2);
1046 t[1].x = t_centre_x + t_radius_x * cos(angle2 + ANGLE_120);
1047 t[1].y = t_centre_y + t_radius_y * sin(angle2 + ANGLE_120);
1048 t[2].x = t_centre_x + t_radius_x * cos(angle2 + ANGLE_240);
1049 t[2].y = t_centre_y + t_radius_y * sin(angle2 + ANGLE_240);
1052 printf("texcoords:[%f,%f]->[%f,%f](%f,%f)\n", t[0].x, t[0].y, t[1].x, t[1].y, texture->max_tx, texture->max_ty);
1058 /* corners into corners - meant to maximise coverage */
1060 calculate_texture_coords(ModeInfo *mi, texture *texture, vector2f t[3]) {
1062 /* equilateral triangle rotating around centre */
1063 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1064 GLfloat width = texture->max_tx - texture->min_tx;
1065 GLfloat height = texture->max_ty - texture->min_ty;
1067 GLfloat centre_x = texture->min_tx + (width * .5);
1068 GLfloat centre_y = texture->min_ty + (height * .5);
1069 /* m radius and t radius should be = .5 */
1070 /* triangle radius calculated using maths 8) */
1071 #define TRADIUS (M_SQRT2 - 1.0)
1072 #define MRADIUS (1.0 - (M_SQRT2 / 2.0))
1073 GLfloat t_radius_x = width * TRADIUS * .95;
1074 GLfloat t_radius_y = height * TRADIUS * .95;
1075 /* movement radius also calculated using maths */
1076 GLfloat m_radius_x = width * MRADIUS * .95;
1077 GLfloat m_radius_y = height * MRADIUS * .95;
1078 GLfloat angle, angle2;
1079 GLfloat t_centre_x, t_centre_y;
1081 /* centre of triangle */
1082 angle = gp->tangle * RADIANS; /* to radians */
1083 t_centre_x = centre_x + m_radius_x * cos(angle);
1084 t_centre_y = centre_y + m_radius_y * sin(angle);
1086 printf("angle: %f, %f\n", angle, gp->tangle);
1087 printf("tcentre: %f,%f\n", t_centre_x, t_centre_y);
1088 printf("tradius: %f,%f\n", t_radius_x, t_radius_y);
1090 printf("size: (%f, %f)\n", width, height);
1091 printf("centre: (%f, %f)\n", centre_x, centre_y);
1092 printf("centre: (%f, %f)\n", centre_x, centre_y);
1093 printf("TRADIUS: %f\n", TRADIUS);
1094 printf("MRADIUS: %f\n", MRADIUS);
1097 /* angle2 is tied to tangle */
1098 angle2 = (180.0 - ((30.0 / 90.0) * gp->tangle)) * RADIANS;
1100 printf("Angle1: %f\tAngle2: %f\n", angle / RADIANS, angle2 / RADIANS);
1102 t[0].x = t_centre_x + t_radius_x * cos(angle2);
1103 t[0].y = t_centre_y + t_radius_y * sin(angle2);
1104 t[1].x = t_centre_x + t_radius_x * cos(angle2 + ANGLE_120);
1105 t[1].y = t_centre_y + t_radius_y * sin(angle2 + ANGLE_120);
1106 t[2].x = t_centre_x + t_radius_x * cos(angle2 + ANGLE_240);
1107 t[2].y = t_centre_y + t_radius_y * sin(angle2 + ANGLE_240);
1110 printf("texcoords:[%f,%f][%f,%f][%f,%f]\n", t[0].x, t[0].y, t[1].x, t[1].y, t[2].x, t[2].y);
1116 draw_hexagons(ModeInfo *mi, int translucency, texture *texture)
1122 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1127 col[3] = (float)translucency / MAX_FADE;
1129 calculate_texture_coords(mi, texture, t);
1131 glColor4f(1.0, 1.0, 1.0, (float)translucency / MAX_FADE);
1132 glEnable(GL_TEXTURE_2D);
1134 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1135 glDepthMask(GL_FALSE);
1136 glBindTexture(GL_TEXTURE_2D, texture->id);
1138 if (gp->list == -1) {
1139 gp->list = glGenLists(1);
1142 /* compile new list */
1143 glNewList(gp->list, GL_COMPILE);
1144 glBegin(GL_TRIANGLES);
1147 ** six triangles to each hexagon
1150 glTexCoord2f(t[0].x, t[0].y);
1152 glTexCoord2f(t[1].x, t[1].y);
1154 glTexCoord2f(t[2].x, t[2].y);
1157 glTexCoord2f(t[0].x, t[0].y);
1159 glTexCoord2f(t[2].x, t[2].y);
1161 glTexCoord2f(t[1].x, t[1].y);
1164 glTexCoord2f(t[0].x, t[0].y);
1166 glTexCoord2f(t[1].x, t[1].y);
1168 glTexCoord2f(t[2].x, t[2].y);
1171 glTexCoord2f(t[0].x, t[0].y);
1173 glTexCoord2f(t[2].x, t[2].y);
1175 glTexCoord2f(t[1].x, t[1].y);
1178 glTexCoord2f(t[0].x, t[0].y);
1180 glTexCoord2f(t[1].x, t[1].y);
1182 glTexCoord2f(t[2].x, t[2].y);
1185 glTexCoord2f(t[0].x, t[0].y);
1187 glTexCoord2f(t[2].x, t[2].y);
1189 glTexCoord2f(t[1].x, t[1].y);
1195 /* call the list n times */
1196 for (i = 0 ; i < sizeof(hex) / sizeof(hex[0]) ; i++) {
1200 glTranslatef(hex[i].x, hex[i].y, 0.0);
1201 glCallList(gp->list);
1207 #ifdef DISPLAY_TEXTURE
1209 /* acd debug - display (bigger, centred) texture */
1210 glScalef(2.0, 2.0, 2.0);
1211 glTranslatef(-0.5, -0.5, 0.0);
1213 glTexCoord2f(0.0, 0.0);
1214 glVertex3f(0.0, 0.0, -0.1);
1215 glTexCoord2f(1.0, 0.0);
1216 glVertex3f(1.0, 0.0, -0.1);
1217 glTexCoord2f(1.0, 1.0);
1218 glVertex3f(1.0, 1.0, -0.1);
1219 glTexCoord2f(0.0, 1.0);
1220 glVertex3f(0.0, 1.0, -0.1);
1223 /* acd debug - display texture triangle */
1224 glColor4f(1.0, 0.5, 1.0, 1.0);
1225 glBegin(GL_LINE_LOOP);
1226 glVertex3f(t[0].x, t[0].y, -0.11);
1227 glVertex3f(t[1].x, t[1].y, -0.11);
1228 glVertex3f(t[2].x, t[2].y, -0.11);
1234 glDisable(GL_TEXTURE_2D);
1235 glDepthMask(GL_TRUE);
1236 glDisable(GL_BLEND);
1241 * main rendering loop
1246 GLfloat x_angle, y_angle, z_angle;
1247 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1251 mi->polygon_count = 0;
1253 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
1258 x_angle = gp->cam_x_phase + gp->tic * gp->cam_x_speed;
1259 y_angle = gp->cam_y_phase + gp->tic * gp->cam_y_speed;
1260 z_angle = gp->cam_z_phase + gp->tic * gp->cam_z_speed;
1263 v1.x = 1 * sin(x_angle);
1264 v1.y = 1 * sin(y_angle);
1270 /* size is changed in pinit() to be distance from plane */
1271 gp->size = MI_SIZE(mi);
1272 if (gp->size > 10) {
1275 if (gp->size <= 0) {
1279 /* user defined size */
1282 /* max distance given by adding the constant and the multiplier */
1283 v1.z = 5.0 + 3.0 * sin(z_angle);
1289 /* update rotation angle (but not if mouse button down) */
1290 if (rotate && !gp->button_down_p)
1292 float new_rangle_vel = 0.0;
1294 /* update camera rotation angle and velocity */
1295 gp->rangle += gp->rangle_vel;
1296 new_rangle_vel = gp->rangle_vel + gp->rangle_acc;
1297 if (new_rangle_vel > -MAX_ANGLE_VEL && new_rangle_vel < MAX_ANGLE_VEL)
1299 /* new velocity is within limits */
1300 gp->rangle_vel = new_rangle_vel;
1303 /* randomly change twisting speed - 3ff = 1024 */
1304 if ((random() % TWISTING_PROBABILITY) < 1.0) {
1305 gp->rangle_acc = INITIAL_ANGLE_ACC * frand(1.0);
1306 if (gp->rangle_vel > 0.0) {
1307 gp->rangle_acc = -gp->rangle_acc;
1312 printf("Rangle: %f : %f : %f\n", gp->rangle, gp->rangle_vel, gp->rangle_acc);
1313 printf("Tangle: %f : %f : %f\n", gp->tangle, gp->tangle_vel, gp->tangle_acc);
1317 /* this makes the image wobble - requires -move and a larger grid */
1318 gluLookAt(0, 0, v1.z, v1.x, v1.y, 0.0, 0.0, 1.0, 0.0);
1320 /* no wobble - camera always perpendicular to grid */
1322 /* rotating camera rather than entire space - smoother */
1326 sin((gp->xmouse * M_PI * 2) + gp->rangle * RADIANS),
1327 cos((gp->xmouse * M_PI * 2) + gp->rangle * RADIANS),
1331 /* light position same as camera */
1340 mi->polygon_count +=
1341 draw_hexagons(mi, MAX_FADE, &gp->textures[gp->visible]);
1345 /* fading - show both textures with alpha
1346 NB first is always max alpha */
1347 mi->polygon_count +=
1348 draw_hexagons(mi, MAX_FADE, &gp->textures[1 - gp->visible]);
1349 mi->polygon_count +=
1350 draw_hexagons(mi, MAX_FADE - gp->fade, &gp->textures[gp->visible]);
1352 /* fade some more */
1355 /* have we faded enough? */
1356 if (gp->fade > MAX_FADE)
1360 gp->visible = 1 - gp->visible;
1364 /* increment texture angle based on time, velocity etc */
1365 /* but only if button is not down */
1366 if (!gp->button_down_p)
1368 float new_tangle_vel = 0.0;
1370 gp->tangle += gp->tangle_vel;
1372 /* work out new texture angle velocity */
1373 new_tangle_vel = gp->tangle_vel + gp->tangle_acc;
1374 if (new_tangle_vel > -MAX_ANGLE_VEL && new_tangle_vel < MAX_ANGLE_VEL)
1376 /* new velocity is inside limits */
1377 gp->tangle_vel = new_tangle_vel;
1380 /* randomly change twisting speed - 3ff = 1024 */
1381 if ((random() % TWISTING_PROBABILITY) < 1.0) {
1382 gp->tangle_acc = INITIAL_ANGLE_ACC * frand(1.0);
1383 if (gp->tangle_vel > 0.0) {
1384 gp->tangle_acc = -gp->tangle_acc;
1393 * new window size or exposure
1395 ENTRYPOINT void reshape_gleidescope(ModeInfo *mi, int width, int height)
1397 GLfloat h = (GLfloat) height / (GLfloat) width;
1399 glViewport(0, 0, (GLint) width, (GLint) height);
1400 glMatrixMode(GL_PROJECTION);
1402 gluPerspective(50.0, 1/h, 0.1, 2000.0);
1403 glMatrixMode (GL_MODELVIEW);
1410 pinit(ModeInfo * mi)
1412 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1414 /* set start time - star_time = 0 implies non-dynamic texture */
1415 gp->start_time = (time_t)0;
1417 /* set the texture size to default */
1426 glShadeModel(GL_SMOOTH);
1427 glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
1428 glEnable(GL_DEPTH_TEST);
1429 glEnable(GL_CULL_FACE);
1430 glDisable(GL_LIGHTING);
1432 /* space for textures */
1433 glGenTextures(1, &gp->textures[0].id);
1434 glGenTextures(1, &gp->textures[1].id);
1437 setup_texture(mi, &gp->textures[gp->visible]);
1440 ** want to choose a value for arg randomly if neither -arg nor -no-arg
1441 ** is specified. xscreensaver libraries don't seem to let you do this -
1442 ** if something isn't true then it is false (pesky two-state boolean values).
1443 ** so, i've defined both -arg and -no-arg to arguments and added the
1445 ** (btw if both -arg and -no-arg are defined then arg is set to False)
1447 if (zoom == False && nozoom == False)
1449 /* no zoom preference - randomise */
1450 zoom = (((random() & 0x1) == 0x1) ? True : False);
1452 else if (nozoom == True)
1454 /* definately no zoom */
1458 if (move == False && nomove == False)
1460 /* no move preference - randomise */
1461 move = (((random() & 0x1) == 0x1) ? True : False);
1463 else if (nomove == True)
1465 /* definately no move */
1469 if (rotate == False && norotate == False)
1471 /* no rotate preference - randomise */
1472 rotate = (((random() & 0x1) == 0x1) ? True : False);
1474 else if (norotate == True)
1476 /* definately no rotate */
1480 /* define cam variables */
1481 gp->cam_x_speed = MAX_CAM_SPEED * frandrange(-.5, 0.5);
1482 gp->cam_x_phase = random() % 360;
1483 gp->cam_y_speed = MAX_CAM_SPEED * frandrange(-.5, 0.5);
1484 gp->cam_y_phase = random() % 360;
1485 gp->cam_z_speed = MAX_CAM_SPEED * frandrange(-.5, 0.5);
1486 gp->cam_z_phase = random() % 360;
1488 /* initial angular speeds */
1489 gp->rangle_vel = INITIAL_ANGLE_VEL * frandrange(-.5, 0.5);
1490 gp->tangle_vel = INITIAL_ANGLE_VEL * frandrange(-.5, 0.5);
1491 gp->rangle_acc = INITIAL_ANGLE_ACC * frandrange(-.5, 0.5);
1492 gp->tangle_acc = INITIAL_ANGLE_ACC * frandrange(-.5, 0.5);
1498 gp->rangle_vel *= speed;
1499 gp->tangle_vel *= speed;
1500 gp->rangle_acc *= speed;
1501 gp->tangle_acc *= speed;
1505 /* distance is 11 - size */
1506 if (gp->size != -1) {
1508 fprintf(stderr, "-size given. ignoring -zoom.\n");
1513 } else if (gp->size >= 10) {
1516 gp->size = 11 - gp->size;
1520 printf("phases [%d, %d, %d]\n", gp->cam_x_phase, gp->cam_y_phase, gp->cam_z_phase);
1525 init_gleidescope(ModeInfo * mi)
1528 int screen = MI_SCREEN(mi);
1530 if (gleidescope == NULL) {
1531 gleidescope = (gleidestruct *) calloc(MI_NUM_SCREENS(mi), sizeof (gleidestruct));
1532 if (gleidescope == NULL) {
1536 gp = &gleidescope[screen];
1537 gp->window = MI_WINDOW(mi);
1541 if ((gp->glx_context = init_GL(mi)) != NULL) {
1543 reshape_gleidescope(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
1544 clear_gl_error(); /* WTF? sometimes "invalid op" from glViewport! */
1546 glDrawBuffer(GL_BACK);
1548 /* do initialisation */
1557 draw_gleidescope(ModeInfo * mi)
1559 gleidestruct *gp = &gleidescope[MI_SCREEN(mi)];
1560 Display *display = MI_DISPLAY(mi);
1561 Window window = MI_WINDOW(mi);
1564 if (!gp->glx_context)
1567 /* Just keep running before the texture has come in. */
1568 /* if (gp->waiting_for_image_p) return; */
1570 glDrawBuffer(GL_BACK);
1572 glXMakeCurrent(display, window, *(gp->glx_context));
1580 glXSwapBuffers(display, window);
1584 grab_frame(display, window);
1588 /* need to change texture? */
1589 if ((gp->start_time != 0) && (duration != -1) && gp->fade == 0) {
1590 if (gp->start_time + duration <= time((time_t *)0)) {
1592 printf("Start Time: %lu - Current Time: %lu\n", (unsigned long)gp->start_time, (unsigned long)time((time_t *)0));
1593 printf("Changing Texture\n");
1595 /* get new snapshot (into back buffer) and start fade count */
1596 setup_texture(mi, &gp->textures[1 - gp->visible]);
1597 /* restart fading */
1604 release_gleidescope(ModeInfo * mi)
1606 if (gleidescope != NULL) {
1609 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
1610 gleidestruct *gp = &gleidescope[screen];
1612 /* acd - is this needed? */
1613 if (gp->glx_context) {
1614 /* Display lists MUST be freed while their glXContext is current. */
1615 glXMakeCurrent(MI_DISPLAY(mi), gp->window, *(gp->glx_context));
1617 /* acd - was code here for freeing things that are no longer in struct */
1620 (void) free((void *) gleidescope);
1627 XSCREENSAVER_MODULE ("Gleidescope", gleidescope)