Added plugin loader. Moved games, demos and the text viewer to loadable plugins. Copy your *.rock files to /.rockbox/rocks/

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3769 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/snow.c

@@ -0,0 +1,111 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Itai Shaked
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ **************************************************************************/
+#include "plugin.h"
+
+#ifdef HAVE_LCD_BITMAP
+
+#define NUM_PARTICLES 100
+
+static short particles[NUM_PARTICLES][2];
+static struct plugin_api* rb;
+
+static bool particle_exists(int particle)
+{
+    if (particles[particle][0]>=0 && particles[particle][1]>=0 && 
+        particles[particle][0]<112 && particles[particle][1]<64) 
+        return true;
+    else
+        return false;
+}
+
+static int create_particle(void)
+{
+    int i;
+
+    for (i=0; i<NUM_PARTICLES; i++) {
+        if (!particle_exists(i)) {
+            particles[i][0]=(rb->rand()%112);
+            particles[i][1]=0;
+            return i;
+        }
+    }
+    return -1;
+}
+
+static void snow_move(void)
+{
+    int i;
+
+    if (!(rb->rand()%2))
+        create_particle();
+
+    for (i=0; i<NUM_PARTICLES; i++) {
+        if (particle_exists(i)) {
+            rb->lcd_clearpixel(particles[i][0],particles[i][1]);
+            switch ((rb->rand()%7)) {
+                case 0:
+                    particles[i][0]++;
+                    break;
+
+                case 1:
+                    particles[i][0]--;
+                    break;
+
+                case 2:
+                    break;
+
+                default:
+                    particles[i][1]++;
+                    break;
+            }
+            if (particle_exists(i))
+                rb->lcd_drawpixel(particles[i][0],particles[i][1]);
+        }
+    }
+}
+
+static void snow_init(void)
+{
+    int i;
+
+    for (i=0; i<NUM_PARTICLES; i++) {
+        particles[i][0]=-1;
+        particles[i][1]=-1;
+    }        
+    rb->lcd_clear_display();
+}
+
+enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
+{
+    TEST_PLUGIN_API(api);
+    (void)(parameter);
+    rb = api;
+
+    snow_init();
+    while (1) {
+        snow_move();
+        rb->lcd_update();
+        rb->sleep(HZ/20);
+        
+        if (rb->button_get(false) == BUTTON_OFF)
+            return false;
+    }
+}
+
+#endif