1 /* carousel, Copyright (c) 2005-2015 Jamie Zawinski <jwz@jwz.org>
2 * Loads a sequence of images and rotates them around.
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation. No representations are made about the suitability of this
9 * software for any purpose. It is provided "as is" without express or
12 * Created: 21-Feb-2005
15 #define DEF_FONT "-*-helvetica-bold-r-normal-*-*-240-*-*-*-*-*-*"
16 #define DEFAULTS "*count: 7 \n" \
18 "*wireframe: False \n" \
19 "*showFPS: False \n" \
20 "*fpsSolid: True \n" \
22 "*font: " DEF_FONT "\n" \
23 "*desktopGrabber: xscreensaver-getimage -no-desktop %s\n" \
24 "*grabDesktopImages: False \n" \
25 "*chooseRandomImages: True \n"
27 # define free_carousel 0
28 # define release_carousel 0
29 # include "xlockmore.h"
32 #define countof(x) (sizeof((x))/sizeof((*x)))
36 # define DEF_SPEED "1.0"
37 # define DEF_DURATION "20"
38 # define DEF_TITLES "True"
39 # define DEF_ZOOM "True"
40 # define DEF_TILT "XY"
41 # define DEF_MIPMAP "True"
42 # define DEF_DEBUG "False"
45 #include "gltrackball.h"
46 #include "grab-ximage.h"
50 # include <X11/Intrinsic.h> /* for XrmDatabase in -debug mode */
53 /* Should be in <GL/glext.h> */
54 # ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT
55 # define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
57 # ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
58 # define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
65 typedef enum { EARLY, NORMAL, LOADING, OUT, IN, DEAD } fade_mode;
66 static int fade_ticks = 60;
69 char *title; /* the filename of this image */
70 int w, h; /* size in pixels of the image */
71 int tw, th; /* size in pixels of the texture */
72 XRectangle geom; /* where in the image the bits are */
78 image current, loading;
79 GLfloat r, theta; /* radius and rotation on the tube */
80 rotator *rot; /* for zoomery */
81 Bool from_top_p; /* whether this image drops in or rises up */
82 time_t expires; /* when this image should be replaced */
83 fade_mode mode; /* in/out animation state */
85 Bool loaded_p; /* whether background load is done */
90 GLXContext *glx_context;
93 trackball_state *trackball;
95 time_t button_down_time;
97 int nframes; /* how many frames are loaded */
99 image_frame **frames; /* pointers to the frames */
101 Bool awaiting_first_images_p;
102 int loads_in_progress;
104 texture_font_data *texfont;
109 int loading_sw, loading_sh;
111 time_t last_time, now;
116 static carousel_state *sss = NULL;
119 /* Command-line arguments
121 static GLfloat speed; /* animation speed scale factor */
122 static int duration; /* reload images after this long */
123 static Bool mipmap_p; /* Use mipmaps instead of single textures. */
124 static Bool titles_p; /* Display image titles. */
125 static Bool zoom_p; /* Throb the images in and out as they spin. */
126 static char *tilt_str;
127 static Bool tilt_x_p; /* Tilt axis towards the viewer */
128 static Bool tilt_y_p; /* Tilt axis side to side */
129 static Bool debug_p; /* Be loud and do weird things. */
132 static XrmOptionDescRec opts[] = {
133 {"-zoom", ".zoom", XrmoptionNoArg, "True" },
134 {"-no-zoom", ".zoom", XrmoptionNoArg, "False" },
135 {"-tilt", ".tilt", XrmoptionSepArg, 0 },
136 {"-no-tilt", ".tilt", XrmoptionNoArg, "" },
137 {"-titles", ".titles", XrmoptionNoArg, "True" },
138 {"-no-titles", ".titles", XrmoptionNoArg, "False" },
139 {"-mipmaps", ".mipmap", XrmoptionNoArg, "True" },
140 {"-no-mipmaps", ".mipmap", XrmoptionNoArg, "False" },
141 {"-duration", ".duration", XrmoptionSepArg, 0 },
142 {"-debug", ".debug", XrmoptionNoArg, "True" },
143 {"-font", ".font", XrmoptionSepArg, 0 },
144 {"-speed", ".speed", XrmoptionSepArg, 0 },
147 static argtype vars[] = {
148 { &mipmap_p, "mipmap", "Mipmap", DEF_MIPMAP, t_Bool},
149 { &debug_p, "debug", "Debug", DEF_DEBUG, t_Bool},
150 { &titles_p, "titles", "Titles", DEF_TITLES, t_Bool},
151 { &zoom_p, "zoom", "Zoom", DEF_ZOOM, t_Bool},
152 { &tilt_str, "tilt", "Tilt", DEF_TILT, t_String},
153 { &speed, "speed", "Speed", DEF_SPEED, t_Float},
154 { &duration, "duration", "Duration", DEF_DURATION, t_Int},
157 ENTRYPOINT ModeSpecOpt carousel_opts = {countof(opts), opts, countof(vars), vars, NULL};
160 /* Allocates a frame structure and stores it in the list.
163 alloc_frame (ModeInfo *mi)
165 carousel_state *ss = &sss[MI_SCREEN(mi)];
166 image_frame *frame = (image_frame *) calloc (1, sizeof (*frame));
170 frame->rot = make_rotator (0, 0, 0, 0, 0.04 * frand(1.0) * speed, False);
172 glGenTextures (1, &frame->current.texid);
173 glGenTextures (1, &frame->loading.texid);
174 if (frame->current.texid <= 0) abort();
175 if (frame->loading.texid <= 0) abort();
177 if (ss->frames_size <= ss->nframes)
179 ss->frames_size = (ss->frames_size * 1.2) + ss->nframes;
180 ss->frames = (image_frame **)
181 realloc (ss->frames, ss->frames_size * sizeof(*ss->frames));
184 fprintf (stderr, "%s: out of memory (%d images)\n",
185 progname, ss->frames_size);
190 ss->frames[ss->nframes++] = frame;
196 static void image_loaded_cb (const char *filename, XRectangle *geom,
197 int image_width, int image_height,
198 int texture_width, int texture_height,
202 /* Load a new file into the given image struct.
205 load_image (ModeInfo *mi, image_frame *frame)
207 carousel_state *ss = &sss[MI_SCREEN(mi)];
208 int wire = MI_IS_WIREFRAME(mi);
210 if (debug_p && !wire && frame->current.w != 0)
211 fprintf (stderr, "%s: dropped %4d x %-4d %4d x %-4d \"%s\"\n",
213 frame->current.geom.width,
214 frame->current.geom.height,
215 frame->current.tw, frame->current.th,
216 (frame->current.title ? frame->current.title : "(null)"));
221 case NORMAL: frame->mode = LOADING; break;
225 ss->loads_in_progress++;
228 image_loaded_cb (0, 0, 0, 0, 0, 0, frame);
231 int w = (MI_WIDTH(mi) / 2) - 1;
232 int h = (MI_HEIGHT(mi) / 2) - 1;
236 if (w > h * 5) { /* tiny window: use 16:9 boxes */
240 load_texture_async (mi->xgwa.screen, mi->window, *ss->glx_context, w, h,
241 mipmap_p, frame->loading.texid,
242 image_loaded_cb, frame);
247 /* Callback that tells us that the texture has been loaded.
250 image_loaded_cb (const char *filename, XRectangle *geom,
251 int image_width, int image_height,
252 int texture_width, int texture_height,
255 image_frame *frame = (image_frame *) closure;
256 ModeInfo *mi = frame->mi;
257 carousel_state *ss = &sss[MI_SCREEN(mi)];
258 int wire = MI_IS_WIREFRAME(mi);
262 frame->loading.w = MI_WIDTH (mi) * (0.5 + frand (1.0));
263 frame->loading.h = MI_HEIGHT (mi);
264 frame->loading.geom.width = frame->loading.w;
265 frame->loading.geom.height = frame->loading.h;
269 if (image_width == 0 || image_height == 0)
272 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
273 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
274 mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
276 if (ss->anisotropic >= 1.0)
277 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
280 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
281 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
283 frame->loading.w = image_width;
284 frame->loading.h = image_height;
285 frame->loading.tw = texture_width;
286 frame->loading.th = texture_height;
287 frame->loading.geom = *geom;
289 if (frame->loading.title)
290 free (frame->loading.title);
291 frame->loading.title = (filename ? strdup (filename) : 0);
293 /* xscreensaver-getimage returns paths relative to the image directory
294 now, so leave the sub-directory part in. Unless it's an absolute path.
296 if (frame->loading.title && frame->loading.title[0] == '/')
297 { /* strip filename to part after last /. */
298 char *s = strrchr (frame->loading.title, '/');
299 if (s) strcpy (frame->loading.title, s+1);
303 fprintf (stderr, "%s: loaded %4d x %-4d %4d x %-4d \"%s\"\n",
305 frame->loading.geom.width,
306 frame->loading.geom.height,
307 frame->loading.tw, frame->loading.th,
308 (frame->loading.title ? frame->loading.title : "(null)"));
312 frame->loaded_p = True;
314 if (ss->loads_in_progress <= 0) abort();
315 ss->loads_in_progress--;
317 /* This image expires N seconds after it finished loading. */
318 frame->expires = time((time_t *) 0) + (duration * MI_COUNT(mi));
322 case EARLY: /* part of the initial batch of images */
324 image swap = frame->current;
325 frame->current = frame->loading;
326 frame->loading = swap;
329 case LOADING: /* start dropping the old image out */
332 frame->mode_tick = fade_ticks / speed;
333 frame->from_top_p = random() & 1;
342 static void loading_msg (ModeInfo *mi, int n);
345 load_initial_images (ModeInfo *mi)
347 carousel_state *ss = &sss[MI_SCREEN(mi)];
349 Bool all_loaded_p = True;
350 for (i = 0; i < ss->nframes; i++)
351 if (! ss->frames[i]->loaded_p)
352 all_loaded_p = False;
356 if (ss->nframes < MI_COUNT (mi))
358 /* The frames currently on the list are fully loaded.
359 Start the next one loading. (We run the image loader
360 asynchronously, but we load them one at a time.)
362 load_image (mi, alloc_frame (mi));
366 /* The first batch of images are now all loaded!
367 Stagger the expire times so that they don't all drop out at once.
369 time_t now = time((time_t *) 0);
372 for (i = 0; i < ss->nframes; i++)
374 image_frame *frame = ss->frames[i];
376 frame->theta = i * 360.0 / ss->nframes;
377 frame->expires = now + (duration * (i + 1));
378 frame->mode = NORMAL;
381 /* Instead of always going clockwise, shuffle the expire times
382 of the frames so that they drop out in a random order.
384 for (i = 0; i < ss->nframes; i++)
386 image_frame *frame1 = ss->frames[i];
387 image_frame *frame2 = ss->frames[random() % ss->nframes];
388 time_t swap = frame1->expires;
389 frame1->expires = frame2->expires;
390 frame2->expires = swap;
393 ss->awaiting_first_images_p = False;
397 loading_msg (mi, ss->nframes-1);
399 return !ss->awaiting_first_images_p;
404 reshape_carousel (ModeInfo *mi, int width, int height)
406 GLfloat h = (GLfloat) height / (GLfloat) width;
409 if (width > height * 5) { /* tiny window: show middle */
410 height = width * 9/16;
412 h = height / (GLfloat) width;
415 glViewport (0, y, (GLint) width, (GLint) height);
417 glMatrixMode(GL_PROJECTION);
419 gluPerspective (60.0, 1/h, 1.0, 8.0);
421 glMatrixMode(GL_MODELVIEW);
423 gluLookAt( 0.0, 0.0, 2.6,
427 glClear(GL_COLOR_BUFFER_BIT);
432 carousel_handle_event (ModeInfo *mi, XEvent *event)
434 carousel_state *ss = &sss[MI_SCREEN(mi)];
436 if (event->xany.type == ButtonPress &&
437 event->xbutton.button == Button1)
439 if (! ss->button_down_p)
440 ss->button_down_time = time((time_t *) 0);
442 else if (event->xany.type == ButtonRelease &&
443 event->xbutton.button == Button1)
445 if (ss->button_down_p)
447 /* Add the time the mouse was held to the expire times of all
448 frames, so that mouse-dragging doesn't count against
451 int secs = time((time_t *) 0) - ss->button_down_time;
453 for (i = 0; i < ss->nframes; i++)
454 ss->frames[i]->expires += secs;
458 if (gltrackball_event_handler (event, ss->trackball,
459 MI_WIDTH (mi), MI_HEIGHT (mi),
462 else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event))
464 int i = random() % ss->nframes;
465 ss->frames[i]->expires = 0;
473 /* Kludge to add "-v" to invocation of "xscreensaver-getimage" in -debug mode
476 hack_resources (Display *dpy)
479 char *res = "desktopGrabber";
480 char *val = get_string_resource (dpy, res, "DesktopGrabber");
484 XrmDatabase db = XtDatabase (dpy);
485 sprintf (buf1, "%.100s.%.100s", progname, res);
486 sprintf (buf2, "%.200s -v", val);
488 value.size = strlen(buf2);
489 XrmPutResource (&db, buf1, "String", &value);
490 # endif /* !HAVE_JWXYZ */
495 loading_msg (ModeInfo *mi, int n)
497 carousel_state *ss = &sss[MI_SCREEN(mi)];
498 int wire = MI_IS_WIREFRAME(mi);
504 sprintf (text, "Loading images...");
506 sprintf (text, "Loading images... (%d%%)",
507 (int) (n * 100 / MI_COUNT(mi)));
509 if (ss->loading_sw == 0)
511 /* only do this once, so that the string doesn't move. */
513 texture_string_metrics (ss->texfont, text, &e, 0, 0);
514 ss->loading_sw = e.width;
515 ss->loading_sh = e.ascent + e.descent;
518 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
520 glMatrixMode(GL_PROJECTION);
524 glMatrixMode(GL_MODELVIEW);
530 double rot = current_device_rotation();
531 glRotatef(rot, 0, 0, 1);
532 if ((rot > 45 && rot < 135) ||
533 (rot < -45 && rot > -135))
535 GLfloat s = MI_WIDTH(mi) / (GLfloat) MI_HEIGHT(mi);
536 glScalef (s, 1/s, 1);
542 if (MI_WIDTH(mi) < MI_HEIGHT(mi)) /* portrait orientation */
544 GLfloat s = (MI_WIDTH(mi) / (GLfloat) MI_HEIGHT(mi));
546 glTranslatef(-s/2, 0, 0);
550 glOrtho(0, MI_WIDTH(mi), 0, MI_HEIGHT(mi), -1, 1);
551 glTranslatef ((MI_WIDTH(mi) - ss->loading_sw) / 2,
552 (MI_HEIGHT(mi) - ss->loading_sh) / 2,
555 glEnable (GL_TEXTURE_2D);
556 glDisable (GL_DEPTH_TEST);
557 print_texture_string (ss->texfont, text);
558 glEnable (GL_DEPTH_TEST);
561 glMatrixMode(GL_PROJECTION);
564 glMatrixMode(GL_MODELVIEW);
567 glXSwapBuffers (MI_DISPLAY (mi), MI_WINDOW(mi));
572 init_carousel (ModeInfo *mi)
574 int screen = MI_SCREEN(mi);
576 int wire = MI_IS_WIREFRAME(mi);
581 if ((ss->glx_context = init_GL(mi)) != NULL) {
582 reshape_carousel (mi, MI_WIDTH(mi), MI_HEIGHT(mi));
583 clear_gl_error(); /* WTF? sometimes "invalid op" from glViewport! */
588 if (!tilt_str || !*tilt_str)
590 else if (!strcasecmp (tilt_str, "0"))
592 else if (!strcasecmp (tilt_str, "X"))
594 else if (!strcasecmp (tilt_str, "Y"))
596 else if (!strcasecmp (tilt_str, "XY"))
597 tilt_x_p = tilt_y_p = 1;
600 fprintf (stderr, "%s: tilt must be 'X', 'Y', 'XY' or '', not '%s'\n",
606 double spin_speed = speed * 0.2; /* rotation of tube around axis */
607 double spin_accel = speed * 0.1;
608 double wander_speed = speed * 0.001; /* tilting of axis */
610 spin_speed *= 0.9 + frand(0.2);
611 wander_speed *= 0.9 + frand(0.2);
613 ss->rot = make_rotator (spin_speed, spin_speed, spin_speed,
614 spin_accel, wander_speed, True);
616 ss->trackball = gltrackball_init (False);
619 if (strstr ((char *) glGetString(GL_EXTENSIONS),
620 "GL_EXT_texture_filter_anisotropic"))
621 glGetFloatv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &ss->anisotropic);
623 ss->anisotropic = 0.0;
625 glDisable (GL_LIGHTING);
626 glEnable (GL_DEPTH_TEST);
627 glDisable (GL_CULL_FACE);
631 glShadeModel (GL_SMOOTH);
632 glEnable (GL_LINE_SMOOTH);
633 /* This gives us a transparent diagonal slice through each image! */
634 /* glEnable (GL_POLYGON_SMOOTH); */
635 glHint (GL_LINE_SMOOTH_HINT, GL_NICEST);
637 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
638 glEnable (GL_ALPHA_TEST);
640 glEnable (GL_POLYGON_OFFSET_FILL);
641 glPolygonOffset (1.0, 1.0);
645 ss->texfont = load_texture_font (MI_DISPLAY(mi), "font");
648 hack_resources (MI_DISPLAY (mi));
651 ss->frames_size = 10;
652 ss->frames = (image_frame **)
653 calloc (1, ss->frames_size * sizeof(*ss->frames));
656 ss->mode_tick = fade_ticks / speed;
658 ss->awaiting_first_images_p = True;
663 draw_frame (ModeInfo *mi, image_frame *frame, time_t now, Bool body_p)
665 carousel_state *ss = &sss[MI_SCREEN(mi)];
666 int wire = MI_IS_WIREFRAME(mi);
668 GLfloat texw = frame->current.geom.width / (GLfloat) frame->current.tw;
669 GLfloat texh = frame->current.geom.height / (GLfloat) frame->current.th;
670 GLfloat texx1 = frame->current.geom.x / (GLfloat) frame->current.tw;
671 GLfloat texy1 = frame->current.geom.y / (GLfloat) frame->current.th;
672 GLfloat texx2 = texx1 + texw;
673 GLfloat texy2 = texy1 + texh;
674 GLfloat aspect = ((GLfloat) frame->current.geom.height /
675 (GLfloat) frame->current.geom.width);
677 glBindTexture (GL_TEXTURE_2D, frame->current.texid);
681 /* Position this image on the wheel.
683 glRotatef (frame->theta, 0, 1, 0);
684 glTranslatef (0, 0, frame->r);
686 /* Scale down the image so that all N frames fit on the wheel
687 without bumping in to each other.
693 case 1: t = -1.0; s = 1.7; break;
694 case 2: t = -0.8; s = 1.6; break;
695 case 3: t = -0.4; s = 1.5; break;
696 case 4: t = -0.2; s = 1.3; break;
697 default: t = 0.0; s = 6.0 / ss->nframes; break;
699 glTranslatef (0, 0, t);
703 /* Center this image on the wheel plane.
705 glTranslatef (-0.5, -(aspect/2), 0);
707 /* Move as per the "zoom in and out" setting.
712 /* Only use the Z component of the rotator for in/out position. */
713 get_position (frame->rot, &x, &y, &z, !ss->button_down_p);
714 glTranslatef (0, 0, z/2);
717 /* Compute the "drop in and out" state.
725 if (!ss->button_down_p &&
726 now >= frame->expires &&
727 ss->loads_in_progress == 0) /* only load one at a time */
728 load_image (mi, frame);
733 if (--frame->mode_tick <= 0) {
734 image swap = frame->current;
735 frame->current = frame->loading;
736 frame->loading = swap;
739 frame->mode_tick = fade_ticks / speed;
743 if (--frame->mode_tick <= 0)
744 frame->mode = NORMAL;
750 /* Now translate for current in/out state.
752 if (frame->mode == OUT || frame->mode == IN)
754 GLfloat t = (frame->mode == OUT
755 ? frame->mode_tick / (fade_ticks / speed)
756 : (((fade_ticks / speed) - frame->mode_tick + 1) /
757 (fade_ticks / speed)));
759 if (frame->from_top_p) t = -t;
760 glTranslatef (0, t, 0);
763 if (body_p) /* Draw the image quad. */
768 glNormal3f (0, 0, 1);
769 glEnable (GL_TEXTURE_2D);
771 glNormal3f (0, 0, 1);
772 glTexCoord2f (texx1, texy2); glVertex3f (0, 0, 0);
773 glTexCoord2f (texx2, texy2); glVertex3f (1, 0, 0);
774 glTexCoord2f (texx2, texy1); glVertex3f (1, aspect, 0);
775 glTexCoord2f (texx1, texy1); glVertex3f (0, aspect, 0);
779 /* Draw a box around it.
782 glColor3f (0.5, 0.5, 0.5);
783 glDisable (GL_TEXTURE_2D);
784 glBegin (GL_LINE_LOOP);
785 glVertex3f (0, 0, 0);
786 glVertex3f (1, 0, 0);
787 glVertex3f (1, aspect, 0);
788 glVertex3f (0, aspect, 0);
792 else /* Draw a title under the image. */
796 GLfloat scale = 0.05;
797 char *title = frame->current.title ? frame->current.title : "(untitled)";
798 texture_string_metrics (ss->texfont, title, &e, 0, 0);
800 sh = e.ascent + e.descent;
802 glTranslatef (0, -scale, 0);
805 glScalef (scale, scale, scale);
807 glTranslatef (((1/scale) - sw) / 2, 0, 0);
812 glEnable (GL_TEXTURE_2D);
813 print_texture_string (ss->texfont, title);
817 glBegin (GL_LINE_LOOP);
818 glVertex3f (0, 0, 0);
819 glVertex3f (sw, 0, 0);
820 glVertex3f (sw, sh, 0);
821 glVertex3f (0, sh, 0);
831 draw_carousel (ModeInfo *mi)
833 carousel_state *ss = &sss[MI_SCREEN(mi)];
836 if (!ss->glx_context)
839 glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(ss->glx_context));
841 if (ss->awaiting_first_images_p)
842 if (!load_initial_images (mi))
845 /* Only check the wall clock every 10 frames */
847 if (ss->now == 0 || ss->draw_tick++ > 10)
849 ss->now = time((time_t *) 0);
850 if (ss->last_time == 0) ss->last_time = ss->now;
856 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
860 glRotatef(current_device_rotation(), 0, 0, 1);
863 /* Run the startup "un-shrink" animation.
868 if (--ss->mode_tick <= 0)
871 ss->last_time = time((time_t *) 0);
881 /* Scale as per the startup "un-shrink" animation.
883 if (ss->mode != NORMAL)
885 GLfloat s = (ss->mode == OUT
886 ? ss->mode_tick / (fade_ticks / speed)
887 : (((fade_ticks / speed) - ss->mode_tick + 1) /
888 (fade_ticks / speed)));
892 /* Rotate and tilt as per the user, and the motion modeller.
896 gltrackball_rotate (ss->trackball);
898 /* Tilt the tube up or down by up to 30 degrees */
899 get_position (ss->rot, &x, &y, &z, !ss->button_down_p);
901 glRotatef (15 - (x * 30), 1, 0, 0);
903 glRotatef (7 - (y * 14), 0, 0, 1);
905 /* Only use the Y component of the rotator. */
906 get_rotation (ss->rot, &x, &y, &z, !ss->button_down_p);
907 glRotatef (y * 360, 0, 1, 0);
910 /* First draw each image, then draw the titles. GL insists that you
911 draw back-to-front in order to make alpha blending work properly,
912 so we need to draw all of the 100% opaque images before drawing
913 any of the not-100%-opaque titles.
915 for (i = 0; i < ss->nframes; i++)
916 draw_frame (mi, ss->frames[i], ss->now, True);
918 for (i = 0; i < ss->nframes; i++)
919 draw_frame (mi, ss->frames[i], ss->now, False);
923 if (mi->fps_p) do_fps (mi);
925 glXSwapBuffers (MI_DISPLAY (mi), MI_WINDOW(mi));
928 XSCREENSAVER_MODULE ("Carousel", carousel)