From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz

[xscreensaver] / hacks / glx / glblur.c

diff --git a/hacks/glx/glblur.c b/hacks/glx/glblur.c
index 193da13f3e85fffe4d5a80c178661546e956ddab..3b25456734eba6ae06fcf1479b772b48c92220f8 100644 (file)
--- a/hacks/glx/glblur.c
+++ b/hacks/glx/glblur.c
@@ -1,5 +1,5 @@
 /* glblur --- radial blur using GL textures
- * Copyright (c) 2002-2004 Jamie Zawinski <jwz@jwz.org>
+ * Copyright (c) 2002-2014 Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -24,7 +24,8 @@
 
 #define DEFAULTS       "*delay:    10000 \n" \
                        "*showFPS:  False \n" \
-                       "*fpsSolid: True  \n"
+                       "*fpsSolid: True  \n" \
+                       "*suppressRotationAnimation: True\n" \
 
 # define refresh_glblur 0
 # define release_glblur 0
@@ -46,7 +47,7 @@
 
 #define DEF_SPIN        "XYZ"
 #define DEF_WANDER      "True"
-#define DEF_BLURSIZE    "15"
+#define DEF_BLUR_SIZE   "15"
 
 typedef struct metaball metaball;
 
@@ -99,7 +100,7 @@ static XrmOptionDescRec opts[] = {
 static argtype vars[] = {
   {&do_spin,   "spin",   "Spin",   DEF_SPIN,   t_String},
   {&do_wander, "wander", "Wander", DEF_WANDER, t_Bool},
-  {&blursize,  "blurSize","BlurSize", DEF_BLURSIZE,  t_Int},
+  {&blursize,  "blurSize","BlurSize", DEF_BLUR_SIZE,  t_Int},
 };
 
 ENTRYPOINT ModeSpecOpt glblur_opts = {countof(opts), opts, countof(vars), vars, NULL};
@@ -124,6 +125,14 @@ reshape_glblur (ModeInfo *mi, int width, int height)
              0.0, 0.0, 0.0,
              0.0, 1.0, 0.0);
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+  }
+# endif
+
   glClear(GL_COLOR_BUFFER_BIT);
 }
 
@@ -239,11 +248,13 @@ init_texture (ModeInfo *mi)
 
   glGenTextures (1, &bp->texture);
   glBindTexture (GL_TEXTURE_2D, bp->texture);
-  glTexImage2D (GL_TEXTURE_2D, 0, 4, 128, 128, 0,
+  glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA,
+                bp->tex_w, bp->tex_h, 0,
                GL_RGBA,
                 /* GL_UNSIGNED_BYTE, */
                 GL_UNSIGNED_INT_8_8_8_8_REV,
                 bp->tex_data);
+  check_gl_error ("texture generation");
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 }
@@ -262,7 +273,7 @@ render_scene_to_texture (ModeInfo *mi)
   glBindTexture (GL_TEXTURE_2D, bp->texture);
   glCopyTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, 0, 0,
                     bp->tex_w, bp->tex_h, 0);
-  check_gl_error ("texture");
+  check_gl_error ("texture2D");
 
   glViewport (0, 0, MI_WIDTH(mi), MI_HEIGHT(mi));
 }
@@ -278,12 +289,9 @@ overlay_blur_texture (ModeInfo *mi)
   GLfloat inc = 0.02 * (25.0 / times);
 
   GLfloat spost = 0;               /* starting texture coordinate offset */
-  GLfloat alpha_inc = 0.9 / times;  /* transparency fade factor */
+  GLfloat alpha_inc;               /* transparency fade factor */
   GLfloat alpha = 0.2;             /* initial transparency */
 
-  glDisable (GL_TEXTURE_GEN_S);
-  glDisable (GL_TEXTURE_GEN_T);
-
   glEnable (GL_TEXTURE_2D);
   glDisable (GL_DEPTH_TEST);
   glBlendFunc (GL_SRC_ALPHA,GL_ONE);
@@ -344,37 +352,10 @@ glblur_handle_event (ModeInfo *mi, XEvent *event)
 {
   glblur_configuration *bp = &bps[MI_SCREEN(mi)];
 
-  if (event->xany.type == ButtonPress &&
-      event->xbutton.button == Button1)
-    {
-      bp->button_down_p = True;
-      gltrackball_start (bp->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)
-    {
-      bp->button_down_p = False;
-      return True;
-    }
-  else if (event->xany.type == ButtonPress &&
-           (event->xbutton.button == Button4 ||
-            event->xbutton.button == Button5))
-    {
-      gltrackball_mousewheel (bp->trackball, event->xbutton.button, 10,
-                              !!event->xbutton.state);
-      return True;
-    }
-  else if (event->xany.type == MotionNotify &&
-           bp->button_down_p)
-    {
-      gltrackball_track (bp->trackball,
-                         event->xmotion.x, event->xmotion.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
+  if (gltrackball_event_handler (event, bp->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &bp->button_down_p))
+    return True;
 
   return False;
 }
@@ -386,20 +367,14 @@ init_glblur (ModeInfo *mi)
   glblur_configuration *bp;
   int wire = MI_IS_WIREFRAME(mi);
 
-  if (!bps) {
-    bps = (glblur_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (glblur_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-  }
+  MI_INIT (mi, bps, NULL);
 
   bp = &bps[MI_SCREEN(mi)];
 
   bp->glx_context = init_GL(mi);
 
   reshape_glblur (mi, MI_WIDTH(mi), MI_HEIGHT(mi));
+  clear_gl_error(); /* WTF? sometimes "invalid op" from glViewport! */
 
   if (!wire)
     {
@@ -428,7 +403,7 @@ init_glblur (ModeInfo *mi)
       glEnable(GL_LIGHTING);
       glEnable(GL_LIGHT0);
 
-      glMateriali(GL_FRONT, GL_SHININESS, shiny);
+      glMaterialf(GL_FRONT, GL_SHININESS, shiny);
     }
 
   {
@@ -459,7 +434,7 @@ init_glblur (ModeInfo *mi)
                             1.0,
                             do_wander ? wander_speed : 0,
                             False);
-    bp->trackball = gltrackball_init ();
+    bp->trackball = gltrackball_init (True);
   }
 
   if (blursize < 0) blursize = 0;
@@ -484,6 +459,7 @@ init_glblur (ModeInfo *mi)
   bp->scene_dlist2 = glGenLists (1);
 
   init_texture (mi);
+
   generate_object (mi);
 }
 
@@ -568,7 +544,6 @@ draw_glblur (ModeInfo *mi)
     glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR, spec);
 
     glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color0);
-
     glCallList (bp->obj_dlist0);
 
     glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color1);
@@ -577,6 +552,7 @@ draw_glblur (ModeInfo *mi)
     glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color2);
     glCallList (bp->obj_dlist2);
 
+    glMatrixMode (GL_MODELVIEW);
     glPopMatrix ();
   }
   glEndList ();
@@ -598,6 +574,7 @@ draw_glblur (ModeInfo *mi)
     glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color3);
     glCallList (bp->obj_dlist3);
 
+    glMatrixMode (GL_MODELVIEW);
     glPopMatrix ();
   }
   glEndList ();