Split grayscale library into several files to make up a real function library. Significantly decreases binary size for plugins using it.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4802 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 65 insertions, 0 deletions

diff --git a/apps/plugins/lib/gray_horline.c b/apps/plugins/lib/gray_horline.c
new file mode 100644
index 0000000000..c5ad0046de
--- /dev/null
+++ b/apps/plugins/lib/gray_horline.c
@@ -0,0 +1,65 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Grayscale framework
+* gray_horline() function
+*
+* This is a generic framework to use grayscale display within Rockbox
+* plugins. It obviously does not work for the player.
+*
+* Copyright (C) 2004 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"
+
+/*---------------------------------------------------------------------------
+ Draw a horizontal line from (x1, y) to (x2, y) with the current drawinfo
+ ----------------------------------------------------------------------------
+ See gray_drawpixel() for details
+ */
+void gray_horline(int x1, int x2, int y)
+{
+    int x;
+    unsigned long pattern;
+    void (*pixelfunc)(int x, int y, unsigned long pattern);
+
+    if ((unsigned) x1 >= (unsigned) _graybuf->width
+        || (unsigned) x2 >= (unsigned) _graybuf->width
+        || (unsigned) y >= (unsigned) _graybuf->height)
+        return;
+
+    if (x1 > x2)
+    {
+        x = x1;
+        x1 = x2;
+        x2 = x;
+    }
+    pixelfunc = _gray_pixelfuncs[_graybuf->drawmode];
+    pattern = (_graybuf->drawmode == GRAY_DRAW_BG) ?
+               _graybuf->bg_pattern : _graybuf->fg_pattern;
+              
+    for (x = x1; x <= x2; x++)
+        pixelfunc(x, y, pattern);
+
+}
+
+#endif // #ifdef HAVE_LCD_BITMAP
+#endif // #ifndef SIMULATOR
+