Original 5.40

1 files changed, 518 insertions, 0 deletions

diff --git a/hacks/glx/flipscreen3d.c b/hacks/glx/flipscreen3d.c
new file mode 100644
index 0000000..e4db5df
--- /dev/null
+++ b/hacks/glx/flipscreen3d.c
@@ -0,0 +1,518 @@
+/*
+ * flipscreen3d - takes snapshots of the screen and flips it around
+ *
+ * version 1.0 - Oct 24, 2001
+ *
+ * Copyright (C) 2001 Ben Buxton (bb@cactii.net)
+ *
+ * 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 STANDALONE
+#define DEFAULTS "*delay:     20000 \n" \
+                 "*showFPS:   False \n" \
+                 "*wireframe: False \n" \
+                 "*useSHM:    True  \n" \
+		 "*suppressRotationAnimation: True\n" \
+
+# define free_screenflip 0
+# define release_screenflip 0
+# include "xlockmore.h"                         /* from the xscreensaver distribution */
+# include "gltrackball.h"
+#else  /* !STANDALONE */
+# include "xlock.h"                                     /* from the xlockmore distribution */
+#endif /* !STANDALONE */
+
+/* lifted from lament.c */
+#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n))))
+#define RANDSIGN() ((random() & 1) ? 1 : -1)
+
+
+#ifdef USE_GL
+
+/* Should be in <GL/glext.h> */
+# ifndef  GL_TEXTURE_MAX_ANISOTROPY_EXT
+#  define GL_TEXTURE_MAX_ANISOTROPY_EXT     0x84FE
+# endif
+# ifndef  GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
+#  define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
+# endif
+
+#define DEF_ROTATE "True"
+static int rotate;
+
+#define QW 12
+#define QH 12
+
+#undef countof
+#define countof(x) (sizeof((x))/sizeof((*x)))
+
+
+static XrmOptionDescRec opts[] = {
+  {"+rotate", ".screenflip.rotate", XrmoptionNoArg, "false" },
+  {"-rotate", ".screenflip.rotate", XrmoptionNoArg, "true" },
+};
+
+
+static argtype vars[] = {
+  {&rotate, "rotate", "Rotate", DEF_ROTATE, t_Bool},
+};
+
+
+
+ENTRYPOINT ModeSpecOpt screenflip_opts = {countof(opts), opts, countof(vars), vars, NULL};
+
+
+#ifdef USE_MODULES
+ModStruct   screenflip_description =
+{"screenflip", "init_screenflip", "draw_screenflip", NULL,
+ "draw_screenflip", "init_screenflip", NULL, &screenflip_opts,
+ 1000, 1, 2, 1, 4, 1.0, "",
+ "Screenflips", 0, NULL};
+
+#endif
+
+
+typedef struct {
+  GLXContext *glx_context;
+  Window window;
+
+  int winw, winh;
+  int tw, th; /* texture width, height */
+  GLfloat min_tx, min_ty;
+  GLfloat max_tx, max_ty;
+  GLfloat qx, qy, qw, qh; /* the quad we'll draw */
+
+  int regrab;
+  int fadetime; /* fade before regrab */
+
+  trackball_state *trackball;
+  Bool button_down_p;
+
+  GLfloat show_colors[4];
+  GLfloat stretch_val_x, stretch_val_y;
+  GLfloat stretch_val_dx, stretch_val_dy;
+
+  GLfloat curx, cury, curz;
+
+  GLfloat rx, ry, rz;
+  GLfloat rot, drot, odrot, ddrot, orot;
+  float theta, rho, dtheta, drho, gamma, dgamma;
+
+  GLuint texid;
+  Bool mipmap_p;
+  Bool waiting_for_image_p;
+  Bool first_image_p;
+
+  GLfloat anisotropic;
+
+} Screenflip;
+
+static Screenflip *screenflip = NULL;
+
+#include "grab-ximage.h"
+
+static const GLfloat viewer[] = {0.0, 0.0, 15.0};
+
+
+static void getSnapshot (ModeInfo *);
+
+
+ENTRYPOINT Bool
+screenflip_handle_event (ModeInfo *mi, XEvent *event)
+{
+  Screenflip *c = &screenflip[MI_SCREEN(mi)];
+
+  if (gltrackball_event_handler (event, c->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &c->button_down_p))
+    return True;
+  else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event))
+    {
+      if (!c->waiting_for_image_p)
+        {
+          getSnapshot (mi);
+          return True;
+        }
+    }
+
+  return False;
+}
+
+
+/* draw the texture mapped quad (actually two back to back)*/
+static void showscreen(Screenflip *c, int frozen, int wire)
+{
+  GLfloat x, y, w, h;
+
+  if (c->fadetime) {
+/*    r -= 0.02; g -= 0.02; b -= 0.02; */
+    c->show_colors[3] -= 0.02;
+    if (c->show_colors[3] < 0) {
+      c->regrab = 1;
+      c->fadetime = 0;
+    }
+  } else if (c->show_colors[3] < 0) {
+    c->show_colors[0] = c->show_colors[1] = 
+      c->show_colors[2] = c->show_colors[3] = 1;
+    c->stretch_val_x = c->stretch_val_y = 
+      c->stretch_val_dx = c->stretch_val_dy = 0;
+  }
+  if (c->stretch_val_dx == 0 && !frozen && !(random() % 25))
+    c->stretch_val_dx = (float)(random() % 100) / 5000;
+  if (c->stretch_val_dy == 0 && !frozen && !(random() % 25))
+    c->stretch_val_dy = (float)(random() % 100) / 5000;
+    
+  x = c->qx;
+  y = c->qy;
+  w = c->qx+c->qw;
+  h = c->qy-c->qh;
+
+  if (!frozen) {
+     w *= sin (c->stretch_val_x) + 1;
+     x *= sin (c->stretch_val_x) + 1;
+     if (!c->button_down_p) {
+     if (!c->fadetime) c->stretch_val_x += c->stretch_val_dx;
+     if (c->stretch_val_x > 2*M_PI && !(random() % 5))
+       c->stretch_val_dx = (float)(random() % 100) / 5000;
+     else
+       c->stretch_val_x -= 2*M_PI;
+     }
+
+     if (!c->button_down_p && !c->fadetime) c->stretch_val_y += c->stretch_val_dy;
+     h *= sin (c->stretch_val_y) / 2 + 1;
+     y *= sin (c->stretch_val_y) / 2 + 1;
+     if (!c->button_down_p) {
+     if (c->stretch_val_y > 2*M_PI && !(random() % 5))
+       c->stretch_val_dy = (float)(random() % 100) / 5000;
+     else
+       c->stretch_val_y -= 2*M_PI;
+     }
+  }
+
+  glColor4f(c->show_colors[0], c->show_colors[1], 
+            c->show_colors[2], c->show_colors[3]);
+
+  if (!wire)
+    {
+      glEnable(GL_TEXTURE_2D);
+      glEnable(GL_BLEND);
+      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+      glDepthMask(GL_FALSE);
+    }
+
+  glBegin(wire ? GL_LINE_LOOP : GL_QUADS);
+
+  glNormal3f(0, 0, 1);
+  glTexCoord2f(c->max_tx, c->max_ty); glVertex3f(w, h, 0);
+  glTexCoord2f(c->max_tx, c->min_ty); glVertex3f(w, y, 0);
+  glTexCoord2f(c->min_tx, c->min_ty); glVertex3f(x, y, 0);
+  glTexCoord2f(c->min_tx, c->max_ty); glVertex3f(x, h, 0);
+
+  glNormal3f(0, 0, -1);
+  glTexCoord2f(c->min_tx, c->min_ty); glVertex3f(x, y, -0.05);
+  glTexCoord2f(c->max_tx, c->min_ty); glVertex3f(w, y, -0.05);
+  glTexCoord2f(c->max_tx, c->max_ty); glVertex3f(w, h, -0.05);
+  glTexCoord2f(c->min_tx, c->max_ty); glVertex3f(x, h, -0.05);
+  glEnd();
+
+
+  glDisable(GL_TEXTURE_2D);
+  glDepthMask(GL_TRUE);
+
+  glBegin(GL_LINE_LOOP);
+   glVertex3f(x, y, 0);
+   glVertex3f(x, h, 0);
+   glVertex3f(w, h, 0);
+   glVertex3f(w, y, 0);
+ glEnd();
+  glDisable(GL_BLEND);
+
+}
+
+/* This function is responsible for 'zooming back' the square after
+ * a new chunk has been grabbed with getSnapshot(), and positioning
+ * it suitably on the screen. Once positioned (where we begin to rotate),
+ * it just does a glTranslatef() and returns 1
+ */
+
+static int inposition(Screenflip *c)
+{
+  GLfloat wx;
+  GLfloat wy;
+  wx = 0 - (c->qw/2);
+  wy = (c->qh/2);
+
+  if (c->curx == 0) c->curx = c->qx;
+  if (c->cury == 0) c->cury = c->qy;
+  if (c->regrab) {
+     c->curz = 0;
+     c->curx = c->qx;
+     c->cury = c->qy;
+     c->regrab = 0;
+  }
+  if (c->curz > -10 || c->curx > wx + 0.1 || c->curx < wx - 0.1 ||
+         c->cury > wy + 0.1 || c->cury < wy - 0.1) {
+    if (c->curz > -10)
+      c->curz -= 0.05;
+    if (c->curx > wx) {
+       c->qx -= 0.02;
+       c->curx -= 0.02;
+    }
+    if (c->curx < wx) {
+       c->qx += 0.02;
+       c->curx += 0.02;
+    }
+    if (c->cury > wy) {
+       c->qy -= 0.02;
+       c->cury -= 0.02;
+    }
+    if (c->cury < wy) {
+       c->qy += 0.02;
+       c->cury += 0.02;
+    }
+    glTranslatef(0, 0, c->curz);
+    return 0;
+  }
+  glTranslatef(0, 0, c->curz);
+  return 1;
+
+}
+
+#if 0
+static void drawgrid(void)
+{
+  int i;
+
+  glColor3f(0, 0.7, 0);
+  glBegin(GL_LINES);
+  for (i = 0 ; i <= 50; i+=2) {
+      glVertex3f( -25, -15, i-70);
+      glVertex3f( 25, -15, i-70);
+      glVertex3f( i-25, -15, -70);
+      glVertex3f( i-25, -15, -20);
+  }
+  glEnd();
+}
+#endif
+
+
+static void display(Screenflip *c, int wire)
+{
+  int frozen;
+  GLfloat rot = current_device_rotation();
+
+  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+  glLoadIdentity();
+  gluLookAt(viewer[0], viewer[1], viewer[2], 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
+  glPushMatrix();
+
+/*
+  glRotatef(rot, 0, 0, 1);
+  if ((rot >  45 && rot <  135) ||
+      (rot < -45 && rot > -135))
+    {
+      GLfloat s = c->winw / (GLfloat) c->winh;
+      glScalef (s, 1/s, 1);
+    }
+*/
+
+  if (inposition(c)) {
+    frozen = 0;
+    glTranslatef(5 * sin(c->theta), 5 * sin(c->rho), 10 * cos(c->gamma) - 10);
+/* randomly change the speed */
+    if (!c->button_down_p && !(random() % 300)) {
+      if (random() % 2)
+        c->drho = 1/60 - (float)(random() % 100)/3000;
+      if (random() % 2)
+        c->dtheta = 1/60 - (float)(random() % 100)/3000;
+      if (random() % 2)
+        c->dgamma = 1/60 - (float)(random() % 100)/3000;
+    }
+    glRotatef(rot, 0, 0, 1);
+    gltrackball_rotate (c->trackball);
+    glRotatef(-rot, 0, 0, 1);
+    if (rotate) glRotatef(c->rot, c->rx, c->ry, c->rz);
+/* update variables with each frame */
+    if(!c->button_down_p && !c->fadetime) {
+      c->theta += c->dtheta;
+      c->rho += c->drho;
+      c->gamma += c->dgamma;
+      c->rot += c->drot;
+      c->drot += c->ddrot;
+    }
+/* dont let our rotation speed get too high */
+    if (c->drot > 5 && c->ddrot > 0)
+        c->ddrot = 0 - (GLfloat)(random() % 100) / 1000;
+    else if (c->drot < -5 && c->ddrot < 0)
+        c->ddrot = (GLfloat)(random() % 100) / 1000;
+  } else { /* reset some paramaters */
+    c->ddrot = 0.05 - (GLfloat)(random() % 100) / 1000;
+    c->theta = c->rho = c->gamma = 0;
+    c->rot = 0;
+    frozen = 1;
+  }
+  if (!c->button_down_p && !c->fadetime && (c->rot >= 360 || c->rot <= -360) && !(random() % 7)) { /* rotate  change */
+    c->rx = (GLfloat)(random() % 100) / 100;
+    c->ry = (GLfloat)(random() % 100) / 100;
+    c->rz = (GLfloat)(random() % 100) / 100;
+  }
+  if (c->odrot * c->drot < 0 && c->tw < c->winw && !(random() % 10)) {
+    c->fadetime = 1;                /* randomly fade and get new snapshot */
+  }
+  c->orot = c->rot;
+  c->odrot = c->drot;
+  if (c->rot > 360 || c->rot < -360) /* dont overflow rotation! */
+    c->rot -= c->rot;
+  showscreen(c, frozen, wire);
+  glPopMatrix();
+  glFlush();
+}
+
+ENTRYPOINT void reshape_screenflip(ModeInfo *mi, int width, int height)
+{
+ Screenflip *c = &screenflip[MI_SCREEN(mi)];
+ glViewport(0,0,(GLint)width, (GLint) height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective(45, 1, 2.0, 85);
+ glMatrixMode(GL_MODELVIEW);
+ c->winw = width;
+ c->winh = height;
+}
+
+static void
+image_loaded_cb (const char *filename, XRectangle *geometry,
+                 int image_width, int image_height, 
+                 int texture_width, int texture_height,
+                 void *closure)
+{
+  Screenflip *c = (Screenflip *) closure;
+
+  c->tw = texture_width;
+  c->th = texture_height;
+  c->min_tx = (GLfloat) geometry->x / c->tw;
+  c->min_ty = (GLfloat) geometry->y / c->th;
+  c->max_tx = (GLfloat) (geometry->x + geometry->width)  / c->tw;
+  c->max_ty = (GLfloat) (geometry->y + geometry->height) / c->th;
+
+  c->qx = -QW/2 + ((GLfloat) geometry->x * QW / image_width);
+  c->qy =  QH/2 - ((GLfloat) geometry->y * QH / image_height);
+  c->qw =  QW   * ((GLfloat) geometry->width  / image_width);
+  c->qh =  QH   * ((GLfloat) geometry->height / image_height);
+
+  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                   (c->mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR));
+
+  if (c->anisotropic >= 1.0)
+    glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 
+                     c->anisotropic);
+
+  c->waiting_for_image_p = False;
+  c->first_image_p = False;
+}
+
+
+static void getSnapshot (ModeInfo *modeinfo)
+{
+  Screenflip *c = &screenflip[MI_SCREEN(modeinfo)];
+
+  if (MI_IS_WIREFRAME(modeinfo))
+    return;
+
+  c->waiting_for_image_p = True;
+  c->mipmap_p = True;
+  load_texture_async (modeinfo->xgwa.screen, modeinfo->window,
+                      *c->glx_context, 0, 0, c->mipmap_p, c->texid,
+                      image_loaded_cb, c);
+}
+
+ENTRYPOINT void init_screenflip(ModeInfo *mi)
+{
+  int screen = MI_SCREEN(mi);
+  Screenflip *c;
+
+ MI_INIT(mi, screenflip);
+ c = &screenflip[screen];
+ c->window = MI_WINDOW(mi);
+
+ c->trackball = gltrackball_init (False);
+
+ if ((c->glx_context = init_GL(mi)) != NULL) {
+      reshape_screenflip(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
+ } else {
+     MI_CLEARWINDOW(mi);
+ }
+ c->winh = MI_WIN_HEIGHT(mi);
+ c->winw = MI_WIN_WIDTH(mi);
+ c->qw = QW;
+ c->qh = QH;
+ c->qx = -6;
+ c->qy = 6;
+
+ c->rx = c->ry = 1;
+ c->odrot = 1;
+
+ c->show_colors[0] = c->show_colors[1] = 
+   c->show_colors[2] = c->show_colors[3] = 1;
+
+ if (! MI_IS_WIREFRAME(mi))
+   {
+     glShadeModel(GL_SMOOTH);
+     glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
+     glEnable(GL_DEPTH_TEST);
+     glEnable(GL_CULL_FACE);
+     glCullFace(GL_BACK);
+     glDisable(GL_LIGHTING);
+   }
+
+ if (strstr ((char *) glGetString(GL_EXTENSIONS),
+             "GL_EXT_texture_filter_anisotropic"))
+   glGetFloatv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &c->anisotropic);
+ else
+   c->anisotropic = 0.0;
+
+ glGenTextures(1, &c->texid);
+
+ c->first_image_p = True;
+ getSnapshot(mi);
+}
+
+ENTRYPOINT void draw_screenflip(ModeInfo *mi)
+{
+  Screenflip *c = &screenflip[MI_SCREEN(mi)];
+  Window w = MI_WINDOW(mi);
+  Display *disp = MI_DISPLAY(mi);
+
+  if (!c->glx_context)
+      return;
+
+  /* Wait for the first image; for subsequent images, load them in the
+     background while animating. */
+  if (c->waiting_for_image_p && c->first_image_p)
+    return;
+
+  glXMakeCurrent(disp, w, *(c->glx_context));
+
+  glBindTexture(GL_TEXTURE_2D, c->texid);
+
+  if (c->regrab)
+    getSnapshot(mi);
+
+  display(c, MI_IS_WIREFRAME(mi));
+
+  if(mi->fps_p) do_fps(mi);
+  glFinish(); 
+  glXSwapBuffers(disp, w);
+}
+
+XSCREENSAVER_MODULE_2 ("FlipScreen3D", flipscreen3d, screenflip)
+
+#endif