From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / glx / bouncingcow.c

diff --git a/hacks/glx/bouncingcow.c b/hacks/glx/bouncingcow.c
index 968002c4f4d7c18c789a20af23ddb8ae529e8597..2229f7157d13c1a043e74bc6fd4901267112e221 100644 (file)
--- a/hacks/glx/bouncingcow.c
+++ b/hacks/glx/bouncingcow.c
@@ -16,7 +16,7 @@
                        "*showFPS:      False       \n" \
                        "*wireframe:    False       \n" \
 
-# define refresh_cow 0
+# define free_cow 0
 # define release_cow 0
 #define DEF_SPEED       "1.0"
 #define DEF_TEXTURE     "(none)"
@@ -156,8 +156,15 @@ ENTRYPOINT void
 reshape_cow (ModeInfo *mi, int width, int height)
 {
   GLfloat h = (GLfloat) height / (GLfloat) width;
+  int y = 0;
 
-  glViewport (0, 0, (GLint) width, (GLint) height);
+  if (width > height * 5) {   /* tiny window: show middle */
+    height = width * 9/16;
+    y = -height/2;
+    h = height / (GLfloat) width;
+  }
+
+  glViewport (0, y, (GLint) width, (GLint) height);
 
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
@@ -211,6 +218,7 @@ load_texture (ModeInfo *mi, const char *filename)
     }
 
   image = xpm_file_to_ximage (dpy, visual, cmap, filename);
+  if (!image) return False;
 
   clear_gl_error();
   glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA,
@@ -238,14 +246,7 @@ init_cow (ModeInfo *mi)
   int i;
   Bool tex_p = False;
 
-  if (!bps) {
-    bps = (cow_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (cow_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-  }
+  MI_INIT (mi, bps);
 
   bp = &bps[MI_SCREEN(mi)];
 
@@ -471,7 +472,16 @@ draw_cow (ModeInfo *mi)
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
   glPushMatrix ();
-  glRotatef(current_device_rotation(), 0, 0, 1);
+
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+    glRotatef(o, 0, 0, 1);
+  }
+# endif
 
   glScalef (0.5, 0.5, 0.5);