scroll_engine: Split out common main and remote lcd functions.

Uses a similar technique as lcd_*.c files of #including a common .c file, so
that a unified implementation can be reused for both displays.

Change-Id: I21f6de76df757b093e1a1dff0a4caf96a44fe77e

1 files changed, 127 insertions, 0 deletions

diff --git a/firmware/drivers/lcd-scroll.c b/firmware/drivers/lcd-scroll.c
new file mode 100644
index 0000000000..ffd4663c79
--- /dev/null
+++ b/firmware/drivers/lcd-scroll.c
@@ -0,0 +1,127 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Michael Sevakis
+ *
+ * LCD scroll control functions (API to apps).
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+/* This file is meant to be #included by scroll_engine.c (twice if a remote
+ * is present) */
+
+#ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
+#define LCDFN(fn) lcd_ ## fn
+#define LCDM(ma) LCD_ ## ma
+#define MAIN_LCD
+#endif
+
+static struct scrollinfo LCDFN(scroll)[LCD_SCROLLABLE_LINES];
+
+struct scroll_screen_info LCDFN(scroll_info) =
+{
+    .scroll       = LCDFN(scroll),
+    .lines        = 0,
+    .ticks        = 12,
+    .delay        = HZ/2,
+    .bidir_limit  = 50,
+#ifdef HAVE_LCD_BITMAP
+    .step         = 6,
+#endif
+#ifdef HAVE_LCD_CHARCELLS
+    .jump_scroll_delay = HZ/4,
+    .jump_scroll       = 0,
+#endif
+};
+
+
+void LCDFN(scroll_stop)(void)
+{
+    LCDFN(scroll_info).lines = 0;
+}
+
+/* Stop scrolling line y in the specified viewport, or all lines if y < 0 */
+void LCDFN(scroll_stop_viewport_line)(const struct viewport *current_vp, int line)
+{
+    int i = 0;
+
+    while (i < LCDFN(scroll_info).lines)
+    {
+        struct viewport *vp = LCDFN(scroll_info).scroll[i].vp;
+        if (((vp == current_vp)) && 
+            ((line < 0) || (LCDFN(scroll_info).scroll[i].y == line)))
+        {
+            /* If i is not the last active line in the array, then move
+               the last item to position i */
+            if ((i + 1) != LCDFN(scroll_info).lines)
+            {
+                LCDFN(scroll_info).scroll[i] =
+                    LCDFN(scroll_info).scroll[LCDFN(scroll_info).lines-1];
+            }
+            LCDFN(scroll_info).lines--;
+
+            /* A line can only appear once, so we're done, 
+             * unless we are clearing the whole viewport */
+            if (line >= 0)
+                return ;
+        }
+        else
+        {
+            i++;
+        }
+    }
+}
+
+/* Stop all scrolling lines in the specified viewport */
+void LCDFN(scroll_stop_viewport)(const struct viewport *current_vp)
+{
+    LCDFN(scroll_stop_viewport_line)(current_vp, -1);
+}
+
+void LCDFN(scroll_speed)(int speed)
+{
+    LCDFN(scroll_info).ticks = scroll_tick_table[speed];
+}
+
+#if defined(HAVE_LCD_BITMAP)
+void LCDFN(scroll_step)(int step)
+{
+    LCDFN(scroll_info).step = step;
+}
+#endif
+
+void LCDFN(scroll_delay)(int ms)
+{
+    LCDFN(scroll_info).delay = ms / (HZ / 10);
+}
+
+void LCDFN(bidir_scroll)(int percent)
+{
+    LCDFN(scroll_info).bidir_limit = percent;
+}
+
+#ifdef HAVE_LCD_CHARCELLS
+void LCDFN(jump_scroll)(int mode) /* 0=off, 1=once, ..., JUMP_SCROLL_ALWAYS */
+{
+    LCDFN(scroll_info).jump_scroll = mode;
+}
+
+void LCDFN(jump_scroll_delay)(int ms)
+{
+    LCDFN(scroll_info).jump_scroll_delay = ms / (HZ / 10);
+}
+#endif