1 files changed, 107 insertions, 0 deletions

diff --git a/apps/plugins/lib/gray_parm.c b/apps/plugins/lib/gray_parm.c
new file mode 100644
index 0000000000..c66cc33339
--- /dev/null
+++ b/apps/plugins/lib/gray_parm.c
@@ -0,0 +1,107 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Greyscale framework
+* Parameter handling
+*
+* This is a generic framework to use grayscale display within Rockbox
+* plugins. It obviously does not work for the player.
+*
+* Copyright (C) 2004-2005 Jens Arnold
+*
+* 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.
+*
+****************************************************************************/
+
+#ifndef SIMULATOR /* not for simulator by now */
+#include "plugin.h"
+
+#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
+#include "gray.h"
+
+/* Set position of the top left corner of the greyscale overlay
+   Note that by is in pixel-block units (8 on Archos/SH1, 4 on H1x0) */
+void gray_set_position(int x, int by)
+{
+    _gray_info.x = x;
+    _gray_info.by = by;
+    
+    if (_gray_info.flags & _GRAY_RUNNING)
+        _gray_info.flags |= _GRAY_DEFERRED_UPDATE;
+}
+
+/* Set the draw mode for subsequent drawing operations */
+void gray_set_drawmode(int mode)
+{
+    _gray_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
+}
+
+/* Return the current draw mode */
+int  gray_get_drawmode(void)
+{
+    return _gray_info.drawmode;
+}
+
+/* Set the foreground shade for subsequent drawing operations */
+void gray_set_foreground(int brightness)
+{
+    unsigned data = MULU16(_LEVEL_FAC * _gray_info.depth, brightness & 0xFF) + 127;
+
+    _gray_info.fg_brightness = (data + (data >> 8)) >> 8; /* approx. data / 255 */
+}
+
+/* Return the current foreground shade */
+int  gray_get_foreground(void)
+{
+    return (_gray_info.fg_brightness * 255 + ((_LEVEL_FAC * _gray_info.depth) >> 1))
+           / (_LEVEL_FAC * _gray_info.depth);
+}
+
+/* Set the background shade for subsequent drawing operations */
+void gray_set_background(int brightness)
+{
+    unsigned data = MULU16(_LEVEL_FAC * _gray_info.depth, brightness & 0xFF) + 127;
+
+    _gray_info.bg_brightness = (data + (data >> 8)) >> 8; /* approx. data / 255 */
+}
+
+/* Return the current background shade */
+int  gray_get_background(void)
+{
+    return (_gray_info.bg_brightness * 255 + ((_LEVEL_FAC * _gray_info.depth) >> 1))
+           / (_LEVEL_FAC * _gray_info.depth);
+}
+
+/* Set draw mode, foreground and background shades at once */
+void gray_set_drawinfo(int mode, int fg_brightness, int bg_brightness)
+{
+    gray_set_drawmode(mode);
+    gray_set_foreground(fg_brightness);
+    gray_set_background(bg_brightness);
+}
+
+/* Set font for the text output routines */
+void gray_setfont(int newfont)
+{
+    _gray_info.curfont = newfont;
+}
+
+/* Get width and height of a text when printed with the current font */
+int  gray_getstringsize(const unsigned char *str, int *w, int *h)
+{
+    return _gray_rb->font_getstringsize(str, w, h, _gray_info.curfont);
+}
+
+#endif /* HAVE_LCD_BITMAP */
+#endif /* !SIMULATOR */
+