+/* carousel, Copyright (c) 2005 Jamie Zawinski <jwz@jwz.org>
+ * Loads a sequence of images and rotates them around.
+ *
+ * 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.
+ *
+ * Created: 21-Feb-2005
+ */
+
+#include <X11/Intrinsic.h>
+
+# define PROGCLASS "Carousel"
+# define HACK_INIT init_carousel
+# define HACK_DRAW draw_carousel
+# define HACK_RESHAPE reshape_carousel
+# define HACK_HANDLE_EVENT carousel_handle_event
+# define EVENT_MASK PointerMotionMask
+# define carousel_opts xlockmore_opts
+
+# define DEF_SPEED "1.0"
+# define DEF_DURATION "20"
+# define DEF_TITLES "True"
+# define DEF_ZOOM "True"
+# define DEF_TILT "XY"
+# define DEF_MIPMAP "True"
+# define DEF_DEBUG "False"
+
+#define DEF_FONT "-*-times-bold-r-normal-*-180-*"
+
+#define DEFAULTS "*count: 7 \n" \
+ "*delay: 10000 \n" \
+ "*speed: " DEF_SPEED "\n" \
+ "*duration: " DEF_DURATION "\n" \
+ "*titles: " DEF_TITLES "\n" \
+ "*zoom: " DEF_ZOOM "\n" \
+ "*tilt: " DEF_TILT "\n" \
+ "*debug: " DEF_DEBUG "\n" \
+ "*mipmap: " DEF_MIPMAP "\n" \
+ "*wireframe: False \n" \
+ "*showFPS: False \n" \
+ "*fpsSolid: True \n" \
+ "*useSHM: True \n" \
+ "*font: " DEF_FONT "\n" \
+ "*desktopGrabber: xscreensaver-getimage -no-desktop %s\n"
+
+# include "xlockmore.h"
+
+#undef countof
+#define countof(x) (sizeof((x))/sizeof((*x)))
+
+#ifdef USE_GL
+
+#include <GL/glu.h>
+#include <math.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "rotator.h"
+#include "gltrackball.h"
+#include "grab-ximage.h"
+#include "texfont.h"
+
+extern XtAppContext app;
+
+typedef struct {
+ double x, y, w, h;
+} rect;
+
+typedef enum { NORMAL, OUT, LOADING, IN, DEAD } fade_mode;
+static int fade_ticks = 60;
+
+typedef struct {
+ ModeInfo *mi;
+
+ char *title; /* the filename of this image */
+ int w, h; /* size in pixels of the image */
+ int tw, th; /* size in pixels of the texture */
+ XRectangle geom; /* where in the image the bits are */
+ GLuint texid; /* which texture contains the image */
+
+ GLfloat r, theta; /* radius and rotation on the tube */
+ rotator *rot; /* for zoomery */
+ Bool from_top_p; /* whether this image drops in or rises up */
+ time_t expires; /* when this image should be replaced */
+ fade_mode mode; /* in/out animation state */
+ int mode_tick;
+ Bool loaded_p; /* whether background load is done */
+
+} image;
+
+
+typedef struct {
+ GLXContext *glx_context;
+ rotator *rot;
+ trackball_state *trackball;
+ Bool button_down_p;
+ time_t button_down_time;
+
+ int nimages; /* how many images are loaded */
+ int images_size;
+ image **images; /* pointers to the images */
+
+ texture_font_data *texfont;
+
+ fade_mode mode;
+ int mode_tick;
+
+} carousel_state;
+
+static carousel_state *sss = NULL;
+
+
+/* Command-line arguments
+ */
+static GLfloat speed; /* animation speed scale factor */
+static int duration; /* reload images after this long */
+static Bool mipmap_p; /* Use mipmaps instead of single textures. */
+static Bool titles_p; /* Display image titles. */
+static Bool zoom_p; /* Throb the images in and out as they spin. */
+static char *tilt_str;
+static Bool tilt_x_p; /* Tilt axis towards the viewer */
+static Bool tilt_y_p; /* Tilt axis side to side */
+static Bool debug_p; /* Be loud and do weird things. */
+
+
+static XrmOptionDescRec opts[] = {
+ {"-zoom", ".zoom", XrmoptionNoArg, "True" },
+ {"-no-zoom", ".zoom", XrmoptionNoArg, "False" },
+ {"-tilt", ".tilt", XrmoptionSepArg, 0 },
+ {"-no-tilt", ".tilt", XrmoptionNoArg, "" },
+ {"-titles", ".titles", XrmoptionNoArg, "True" },
+ {"-no-titles", ".titles", XrmoptionNoArg, "True" },
+ {"-mipmaps", ".mipmap", XrmoptionNoArg, "True" },
+ {"-no-mipmaps", ".mipmap", XrmoptionNoArg, "False" },
+ {"-duration", ".duration", XrmoptionSepArg, 0 },
+ {"-debug", ".debug", XrmoptionNoArg, "True" },
+ {"-font", ".font", XrmoptionSepArg, 0 },
+ {"-speed", ".speed", XrmoptionSepArg, 0 },
+};
+
+static argtype vars[] = {
+ { &mipmap_p, "mipmap", "Mipmap", DEF_MIPMAP, t_Bool},
+ { &debug_p, "debug", "Debug", DEF_DEBUG, t_Bool},
+ { &titles_p, "titles", "Titles", DEF_TITLES, t_Bool},
+ { &zoom_p, "zoom", "Zoom", DEF_ZOOM, t_Bool},
+ { &tilt_str, "tilt", "Tilt", DEF_TILT, t_String},
+ { &speed, "speed", "Speed", DEF_SPEED, t_Float},
+ { &duration, "duration", "Duration", DEF_DURATION, t_Int},
+};
+
+ModeSpecOpt carousel_opts = {countof(opts), opts, countof(vars), vars, NULL};
+
+
+/* Allocates an image structure and stores it in the list.
+ */
+static image *
+alloc_image (ModeInfo *mi)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ image *img = (image *) calloc (1, sizeof (*img));
+
+ img->mi = mi;
+ img->rot = make_rotator (0, 0, 0, 0, 0.04 * frand(1.0) * speed, False);
+
+ glGenTextures (1, &img->texid);
+ if (img->texid <= 0) abort();
+
+ if (ss->images_size <= ss->nimages)
+ {
+ ss->images_size = (ss->images_size * 1.2) + ss->nimages;
+ ss->images = (image **)
+ realloc (ss->images, ss->images_size * sizeof(*ss->images));
+ if (! ss->images)
+ {
+ fprintf (stderr, "%s: out of memory (%d images)\n",
+ progname, ss->images_size);
+ exit (1);
+ }
+ }
+
+ ss->images[ss->nimages++] = img;
+
+ return img;
+}
+
+
+static void image_loaded_cb (const char *filename, XRectangle *geom,
+ int image_width, int image_height,
+ int texture_width, int texture_height,
+ void *closure);
+
+
+/* Load a new file into the given image struct.
+ */
+static void
+load_image (ModeInfo *mi, image *img, Bool force_sync_p)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ int wire = MI_IS_WIREFRAME(mi);
+ Bool async_p = !force_sync_p;
+ int i;
+
+ if (debug_p && !wire && img->w != 0)
+ fprintf (stderr, "%s: dropped %4d x %-4d %4d x %-4d \"%s\"\n",
+ progname, img->geom.width, img->geom.height, img->tw, img->th,
+ (img->title ? img->title : "(null)"));
+
+ if (img->title)
+ {
+ free (img->title);
+ img->title = 0;
+ }
+
+ img->mode = LOADING;
+
+ if (wire)
+ image_loaded_cb (0, 0, 0, 0, 0, 0, img);
+ else if (async_p)
+ screen_to_texture_async (mi->xgwa.screen, mi->window,
+ MI_WIDTH(mi)/2-1,
+ MI_HEIGHT(mi)/2-1,
+ mipmap_p, img->texid, image_loaded_cb, img);
+ else
+ {
+ char *filename = 0;
+ XRectangle geom;
+ int iw=0, ih=0, tw=0, th=0;
+ time_t start = time((time_t *) 0);
+ time_t end;
+
+ glBindTexture (GL_TEXTURE_2D, img->texid);
+ if (! screen_to_texture (mi->xgwa.screen, mi->window,
+ MI_WIDTH(mi)/2-1,
+ MI_HEIGHT(mi)/2-1,
+ mipmap_p, &filename, &geom, &iw, &ih, &tw, &th))
+ exit(1);
+ image_loaded_cb (filename, &geom, iw, ih, tw, th, img);
+ if (filename) free (filename);
+
+ /* Push the expire times of all images forward by the amount of time
+ it took to load *this* image, so that we don't count image-loading
+ time against image duration.
+ */
+ end = time((time_t *) 0);
+ for (i = 0; i < ss->nimages; i++)
+ ss->images[i]->expires += end - start;
+ }
+}
+
+
+/* Callback that tells us that the texture has been loaded.
+ */
+static void
+image_loaded_cb (const char *filename, XRectangle *geom,
+ int image_width, int image_height,
+ int texture_width, int texture_height,
+ void *closure)
+{
+ image *img = (image *) closure;
+ ModeInfo *mi = img->mi;
+ /* slideshow_state *ss = &sss[MI_SCREEN(mi)]; */
+ int wire = MI_IS_WIREFRAME(mi);
+
+ if (wire)
+ {
+ img->w = MI_WIDTH (mi) * (0.5 + frand (1.0));
+ img->h = MI_HEIGHT (mi);
+ img->geom.width = img->w;
+ img->geom.height = img->h;
+ goto DONE;
+ }
+
+ if (image_width == 0 || image_height == 0)
+ exit (1);
+
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+ mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
+
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+ img->w = image_width;
+ img->h = image_height;
+ img->tw = texture_width;
+ img->th = texture_height;
+ img->geom = *geom;
+ img->title = (filename ? strdup (filename) : 0);
+
+ if (img->title) /* strip filename to part after last /. */
+ {
+ char *s = strrchr (img->title, '/');
+ if (s) strcpy (img->title, s+1);
+ }
+
+ if (debug_p)
+ fprintf (stderr, "%s: loaded %4d x %-4d %4d x %-4d \"%s\"\n",
+ progname,
+ img->geom.width, img->geom.height, img->tw, img->th,
+ (img->title ? img->title : "(null)"));
+
+ DONE:
+
+ /* This image expires N seconds after it finished loading. */
+ img->expires = time((time_t *) 0) + (duration * MI_COUNT(mi));
+
+ img->mode = IN;
+ img->mode_tick = fade_ticks * speed;
+ img->from_top_p = random() & 1;
+ img->loaded_p = True;
+}
+
+
+
+
+/* Free the image and texture, after nobody is referencing it.
+ */
+#if 0
+static void
+destroy_image (ModeInfo *mi, image *img)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ Bool freed_p = False;
+ int i;
+
+ if (!img) abort();
+ if (img->texid <= 0) abort();
+
+ for (i = 0; i < ss->nimages; i++) /* unlink it from the list */
+ if (ss->images[i] == img)
+ {
+ int j;
+ for (j = i; j < ss->nimages-1; j++) /* pull remainder forward */
+ ss->images[j] = ss->images[j+1];
+ ss->images[j] = 0;
+ ss->nimages--;
+ freed_p = True;
+ break;
+ }
+
+ if (!freed_p) abort();
+
+ if (debug_p)
+ fprintf (stderr, "%s: unloaded %4d x %-4d %4d x %-4d \"%s\"\n",
+ progname,
+ img->geom.width, img->geom.height, img->tw, img->th,
+ (img->title ? img->title : "(null)"));
+
+ if (img->title) free (img->title);
+ glDeleteTextures (1, &img->texid);
+ free (img);
+}
+#endif
+
+
+static void loading_msg (ModeInfo *mi, int n);
+
+static void
+load_initial_images (ModeInfo *mi)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ int i;
+ time_t now;
+ Bool async_p = True; /* computed after first image */
+
+ for (i = 0; i < MI_COUNT(mi); i++)
+ {
+ image *img;
+ loading_msg (mi, (async_p ? 0 : i));
+ img = alloc_image (mi);
+ img->r = 1.0;
+ img->theta = i * 360.0 / MI_COUNT(mi);
+
+ load_image (mi, img, True);
+ if (i == 0)
+ async_p = !img->loaded_p;
+ }
+
+ /* Wait for the images to load...
+ */
+ while (1)
+ {
+ int j;
+ int count = 0;
+
+ for (j = 0; j < MI_COUNT(mi); j++)
+ if (ss->images[j]->loaded_p)
+ count++;
+ if (count == MI_COUNT(mi))
+ break;
+ loading_msg (mi, count);
+
+ usleep (100000); /* check every 1/10th sec */
+ if (i++ > 600) abort(); /* if a minute has passed, we're broken */
+
+ while (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput))
+ XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput);
+ }
+
+ /* Stagger expire times of the first batch of images.
+ */
+ now = time((time_t *) 0);
+ for (i = 0; i < ss->nimages; i++)
+ {
+ image *img = ss->images[i];
+ img->expires = now + (duration * (i + 1));
+ img->mode = NORMAL;
+ }
+
+ /* Instead of always going clockwise, shuffle the expire times
+ of the images so that they drop out in a random order.
+ */
+ for (i = 0; i < ss->nimages; i++)
+ {
+ image *img1 = ss->images[i];
+ image *img2 = ss->images[random() % ss->nimages];
+ time_t swap = img1->expires;
+ img1->expires = img2->expires;
+ img2->expires = swap;
+ }
+}
+
+
+void
+reshape_carousel (ModeInfo *mi, int width, int height)
+{
+ GLfloat h = (GLfloat) height / (GLfloat) width;
+
+ glViewport (0, 0, (GLint) width, (GLint) height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective (60.0, 1/h, 1.0, 8.0);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ gluLookAt( 0.0, 0.0, 2.6,
+ 0.0, 0.0, 0.0,
+ 0.0, 1.0, 0.0);
+
+ glClear(GL_COLOR_BUFFER_BIT);
+}
+
+
+Bool
+carousel_handle_event (ModeInfo *mi, XEvent *event)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button == Button1)
+ {
+ if (! ss->button_down_p)
+ ss->button_down_time = time((time_t *) 0);
+ ss->button_down_p = True;
+ gltrackball_start (ss->trackball,
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
+ }
+ else if (event->xany.type == ButtonRelease &&
+ event->xbutton.button == Button1)
+ {
+ if (ss->button_down_p)
+ {
+ /* Add the time the mouse was held to the expire times of all
+ images, so that mouse-dragging doesn't count against
+ image expiration.
+ */
+ int secs = time((time_t *) 0) - ss->button_down_time;
+ int i;
+ for (i = 0; i < ss->nimages; i++)
+ ss->images[i]->expires += secs;
+ }
+ ss->button_down_p = False;
+ return True;
+ }
+ else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5))
+ {
+ gltrackball_mousewheel (ss->trackball, event->xbutton.button, 5,
+ !event->xbutton.state);
+ return True;
+ }
+ else if (event->xany.type == MotionNotify &&
+ ss->button_down_p)
+ {
+ gltrackball_track (ss->trackball,
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
+ }
+
+ return False;
+}
+
+
+/* Kludge to add "-v" to invocation of "xscreensaver-getimage" in -debug mode
+ */
+static void
+hack_resources (void)
+{
+#if 0
+ char *res = "desktopGrabber";
+ char *val = get_string_resource (res, "DesktopGrabber");
+ char buf1[255];
+ char buf2[255];
+ XrmValue value;
+ sprintf (buf1, "%.100s.%.100s", progclass, res);
+ sprintf (buf2, "%.200s -v", val);
+ value.addr = buf2;
+ value.size = strlen(buf2);
+ XrmPutResource (&db, buf1, "String", &value);
+#endif
+}
+
+
+static void
+loading_msg (ModeInfo *mi, int n)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ int wire = MI_IS_WIREFRAME(mi);
+ char text[100];
+ static int sw=0, sh=0;
+ GLfloat scale;
+
+ if (wire) return;
+
+ if (n == 0)
+ sprintf (text, "Loading images...");
+ else
+ sprintf (text, "Loading images... (%d%%)",
+ (int) (n * 100 / MI_COUNT(mi)));
+
+ if (sw == 0) /* only do this once, so that the string doesn't move. */
+ sw = texture_string_width (ss->texfont, text, &sh);
+
+ scale = sh / (GLfloat) MI_HEIGHT(mi);
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glLoadIdentity();
+ gluOrtho2D(0, MI_WIDTH(mi), 0, MI_HEIGHT(mi));
+
+ glTranslatef ((MI_WIDTH(mi) - sw) / 2,
+ (MI_HEIGHT(mi) - sh) / 2,
+ 0);
+ glColor3f (1, 1, 0);
+ glEnable (GL_TEXTURE_2D);
+ print_texture_string (ss->texfont, text);
+ glPopMatrix();
+
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+
+ glMatrixMode(GL_MODELVIEW);
+
+ glFinish();
+ glXSwapBuffers (MI_DISPLAY (mi), MI_WINDOW(mi));
+}
+
+
+void
+init_carousel (ModeInfo *mi)
+{
+ int screen = MI_SCREEN(mi);
+ carousel_state *ss;
+ int wire = MI_IS_WIREFRAME(mi);
+
+ if (sss == NULL) {
+ if ((sss = (carousel_state *)
+ calloc (MI_NUM_SCREENS(mi), sizeof(carousel_state))) == NULL)
+ return;
+ }
+ ss = &sss[screen];
+
+ if ((ss->glx_context = init_GL(mi)) != NULL) {
+ reshape_carousel (mi, MI_WIDTH(mi), MI_HEIGHT(mi));
+ } else {
+ MI_CLEARWINDOW(mi);
+ }
+
+ if (!tilt_str || !*tilt_str)
+ ;
+ else if (!strcasecmp (tilt_str, "X"))
+ tilt_x_p = 1;
+ else if (!strcasecmp (tilt_str, "Y"))
+ tilt_y_p = 1;
+ else if (!strcasecmp (tilt_str, "XY"))
+ tilt_x_p = tilt_y_p = 1;
+ else
+ {
+ fprintf (stderr, "%s: tilt must be 'X', 'Y', 'XY' or '', not '%s'\n",
+ progname, tilt_str);
+ exit (1);
+ }
+
+ {
+ double spin_speed = speed * 0.2; /* rotation of tube around axis */
+ double spin_accel = speed * 0.1;
+ double wander_speed = speed * 0.001; /* tilting of axis */
+
+ spin_speed *= 0.9 + frand(0.2);
+ wander_speed *= 0.9 + frand(0.2);
+
+ ss->rot = make_rotator (spin_speed, spin_speed, spin_speed,
+ spin_accel, wander_speed, True);
+
+ ss->trackball = gltrackball_init ();
+ }
+
+ glDisable (GL_LIGHTING);
+ glEnable (GL_DEPTH_TEST);
+ glDisable (GL_CULL_FACE);
+
+ if (! wire)
+ {
+ glShadeModel (GL_SMOOTH);
+ glEnable (GL_LINE_SMOOTH);
+ /* This gives us a transparent diagonal slice through each image! */
+ /* glEnable (GL_POLYGON_SMOOTH); */
+ glHint (GL_LINE_SMOOTH_HINT, GL_NICEST);
+ glEnable (GL_BLEND);
+ glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable (GL_ALPHA_TEST);
+
+ glEnable (GL_POLYGON_OFFSET_FILL);
+ glPolygonOffset (1.0, 1.0);
+
+ }
+
+ ss->texfont = load_texture_font (MI_DISPLAY(mi), "font");
+
+ if (debug_p)
+ hack_resources();
+
+ ss->nimages = 0;
+ ss->images_size = 10;
+ ss->images = (image **) calloc (1, ss->images_size * sizeof(*ss->images));
+
+ ss->mode = IN;
+ ss->mode_tick = fade_ticks * speed;
+
+ load_initial_images (mi);
+}
+
+
+void
+draw_carousel (ModeInfo *mi)
+{
+ carousel_state *ss = &sss[MI_SCREEN(mi)];
+ int wire = MI_IS_WIREFRAME(mi);
+ static time_t last_time = 0;
+ static time_t now = 0;
+ int i;
+
+ if (!ss->glx_context)
+ return;
+
+ /* Only check the wall clock every 10 frames */
+ {
+ static int tick = 0;
+ if (now == 0 || tick++ > 10)
+ {
+ now = time((time_t *) 0);
+ if (last_time == 0) last_time = now;
+ tick = 0;
+ }
+ }
+
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+
+
+ /* Run the startup "un-shrink" animation.
+ */
+ switch (ss->mode)
+ {
+ case IN:
+ if (--ss->mode_tick <= 0)
+ {
+ ss->mode = NORMAL;
+ last_time = time((time_t *) 0);
+ }
+ break;
+ case NORMAL:
+ break;
+ default:
+ abort();
+ }
+
+
+ /* Scale as per the startup "un-shrink" animation.
+ */
+ if (ss->mode != NORMAL)
+ {
+ GLfloat s = (ss->mode == OUT
+ ? ss->mode_tick / (fade_ticks * speed)
+ : (((fade_ticks * speed) - ss->mode_tick + 1) /
+ (fade_ticks * speed)));
+ glScalef (s, s, s);
+ }
+
+ /* Rotate and tilt as per the user, and the motion modeller.
+ */
+ {
+ double x, y, z;
+ gltrackball_rotate (ss->trackball);
+
+ /* Tilt the tube up or down by up to 30 degrees */
+ get_position (ss->rot, &x, &y, &z, !ss->button_down_p);
+ if (tilt_x_p)
+ glRotatef (15 - (x * 30), 1, 0, 0);
+ if (tilt_y_p)
+ glRotatef (7 - (y * 14), 0, 0, 1);
+
+ /* Only use the Y component of the rotator. */
+ get_rotation (ss->rot, &x, &y, &z, !ss->button_down_p);
+ glRotatef (y * 360, 0, 1, 0);
+ }
+
+ /* Render and update each image on the disc.
+ */
+ for (i = 0; i < ss->nimages; i++)
+ {
+ image *img = ss->images[i];
+ GLfloat texw = img->geom.width / (GLfloat) img->tw;
+ GLfloat texh = img->geom.height / (GLfloat) img->th;
+ GLfloat texx1 = img->geom.x / (GLfloat) img->tw;
+ GLfloat texy1 = img->geom.y / (GLfloat) img->th;
+ GLfloat texx2 = texx1 + texw;
+ GLfloat texy2 = texy1 + texh;
+ GLfloat aspect = img->geom.height / (GLfloat) img->geom.width;
+
+ glBindTexture (GL_TEXTURE_2D, img->texid);
+
+ glPushMatrix();
+
+ /* Position this image on the wheel.
+ */
+ glRotatef (img->theta, 0, 1, 0);
+ glTranslatef (0, 0, img->r);
+
+ /* Scale down the image so that all N images fit on the wheel
+ without bumping in to each other.
+ */
+ {
+ GLfloat t, s;
+ switch (ss->nimages)
+ {
+ case 1: t = -1.0; s = 1.7; break;
+ case 2: t = -0.8; s = 1.6; break;
+ case 3: t = -0.4; s = 1.5; break;
+ case 4: t = -0.2; s = 1.3; break;
+ default: t = 0.0; s = 6.0 / ss->nimages; break;
+ }
+ glTranslatef (0, 0, t);
+ glScalef (s, s, s);
+ }
+
+ /* Center this image on the wheel plane.
+ */
+ glTranslatef (-0.5, -(aspect/2), 0);
+
+ /* Move as per the "zoom in and out" setting.
+ */
+ if (zoom_p)
+ {
+ double x, y, z;
+ /* Only use the Z component of the rotator for in/out position. */
+ get_position (img->rot, &x, &y, &z, !ss->button_down_p);
+ glTranslatef (0, 0, z/2);
+ }
+
+ /* Compute the "drop in and out" state.
+ */
+ switch (img->mode)
+ {
+ case NORMAL:
+ if (!ss->button_down_p &&
+ now >= img->expires)
+ {
+ img->mode = OUT;
+ img->mode_tick = fade_ticks * speed;
+ }
+ break;
+ case OUT:
+ if (--img->mode_tick <= 0)
+ load_image (mi, img, False);
+ break;
+ case LOADING:
+ /* just wait, with the image off screen. */
+ break;
+ case IN:
+ if (--img->mode_tick <= 0)
+ img->mode = NORMAL;
+ break;
+ default:
+ abort();
+ }
+
+ /* Now drop in/out.
+ */
+ if (img->mode != NORMAL)
+ {
+ GLfloat t = (img->mode == LOADING
+ ? -100
+ : img->mode == OUT
+ ? img->mode_tick / (fade_ticks * speed)
+ : (((fade_ticks * speed) - img->mode_tick + 1) /
+ (fade_ticks * speed)));
+ t = 5 * (1 - t);
+ if (img->from_top_p) t = -t;
+ glTranslatef (0, t, 0);
+ }
+
+ /* Draw the image quad.
+ */
+ if (! wire)
+ {
+ glColor3f (1, 1, 1);
+ glNormal3f (0, 0, 1);
+ glEnable (GL_TEXTURE_2D);
+ glBegin (GL_QUADS);
+ glNormal3f (0, 0, 1);
+ glTexCoord2f (texx1, texy2); glVertex3f (0, 0, 0);
+ glTexCoord2f (texx2, texy2); glVertex3f (1, 0, 0);
+ glTexCoord2f (texx2, texy1); glVertex3f (1, aspect, 0);
+ glTexCoord2f (texx1, texy1); glVertex3f (0, aspect, 0);
+ glEnd();
+ }
+
+ /* Draw a box around it.
+ */
+ glLineWidth (2.0);
+ glColor3f (0.5, 0.5, 0.5);
+ glDisable (GL_TEXTURE_2D);
+ glBegin (GL_LINE_LOOP);
+ glVertex3f (0, 0, 0);
+ glVertex3f (1, 0, 0);
+ glVertex3f (1, aspect, 0);
+ glVertex3f (0, aspect, 0);
+ glEnd();
+
+ /* Draw a title under the image.
+ */
+ if (titles_p)
+ {
+ int sw, sh;
+ GLfloat scale = 0.05;
+ char *title = img->title ? img->title : "(untitled)";
+ sw = texture_string_width (ss->texfont, title, &sh);
+
+ glTranslatef (0, -scale, 0);
+
+ scale /= sh;
+ glScalef (scale, scale, scale);
+
+ glTranslatef (((1/scale) - sw) / 2, 0, 0);
+ glColor3f (1, 1, 1);
+
+ if (!wire)
+ {
+ glEnable (GL_TEXTURE_2D);
+ print_texture_string (ss->texfont, title);
+ }
+ else
+ {
+ glBegin (GL_LINE_LOOP);
+ glVertex3f (0, 0, 0);
+ glVertex3f (sw, 0, 0);
+ glVertex3f (sw, sh, 0);
+ glVertex3f (0, sh, 0);
+ glEnd();
+ }
+ }
+
+ glPopMatrix();
+ }
+ glPopMatrix();
+
+ if (mi->fps_p) do_fps (mi);
+ glFinish();
+ glXSwapBuffers (MI_DISPLAY (mi), MI_WINDOW(mi));
+}
+
+#endif /* USE_GL */
projects / xscreensaver / commitdiff