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-rw-r--r--firmware/drivers/lcd-scroll.c127
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