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authorJens Arnold <amiconn@rockbox.org>2005-07-12 23:50:37 +0000
committerJens Arnold <amiconn@rockbox.org>2005-07-12 23:50:37 +0000
commit937725f6749bced2526a13ebb8772233986917e3 (patch)
tree18d3711f1b8bd2d9882a55d4461069a735b54e42
parent89d6e950fd6c76c15eec15ef513e44c147fa3862 (diff)
downloadrockbox-937725f6749bced2526a13ebb8772233986917e3.tar.gz
rockbox-937725f6749bced2526a13ebb8772233986917e3.zip
Beginnings of a library complementing the core LCD functions. First function: filled triangle drawing.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7128 a1c6a512-1295-4272-9138-f99709370657
-rw-r--r--apps/plugins/lib/SOURCES3
-rw-r--r--apps/plugins/lib/xlcd.c109
-rw-r--r--apps/plugins/lib/xlcd.h34
3 files changed, 146 insertions, 0 deletions
diff --git a/apps/plugins/lib/SOURCES b/apps/plugins/lib/SOURCES
index 49abf854da..00cc6d82c4 100644
--- a/apps/plugins/lib/SOURCES
+++ b/apps/plugins/lib/SOURCES
@@ -31,6 +31,9 @@ gray_set_foreground.c
gray_setfont.c
gray_verline.c
#endif
+#ifdef HAVE_LCD_BITMAP
+xlcd.c
+#endif
#ifdef HAVE_LCD_CHARCELLS
playergfx.c
#endif
diff --git a/apps/plugins/lib/xlcd.c b/apps/plugins/lib/xlcd.c
new file mode 100644
index 0000000000..a0dcc2ac3e
--- /dev/null
+++ b/apps/plugins/lib/xlcd.c
@@ -0,0 +1,109 @@
+/***************************************************************************
+* __________ __ ___.
+* Open \______ \ ____ ____ | | _\_ |__ _______ ___
+* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+* \/ \/ \/ \/ \/
+* $Id$
+*
+* Additional LCD routines not present in the core itself
+*
+* Copyright (C) 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.
+*
+****************************************************************************/
+
+#include "plugin.h"
+
+#ifdef HAVE_LCD_BITMAP
+
+/*** globals ***/
+
+static struct plugin_api *local_rb = NULL; /* global api struct pointer */
+
+/*** functions ***/
+
+/* library init */
+void xlcd_init(struct plugin_api* newrb)
+{
+ local_rb = newrb;
+}
+
+/* draw a filled triangle */
+void xlcd_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3)
+{
+ int x, y;
+ long fp_y1, fp_y2, fp_dy1, fp_dy2;
+
+ /* sort vertices by increasing x value */
+ if (x1 > x3)
+ {
+ if (x2 < x3) /* x2 < x3 < x1 */
+ {
+ x = x1; x1 = x2; x2 = x3; x3 = x;
+ y = y1; y1 = y2; y2 = y3; y3 = y;
+ }
+ else if (x2 > x1) /* x3 < x1 < x2 */
+ {
+ x = x1; x1 = x3; x3 = x2; x2 = x;
+ y = y1; y1 = y3; y3 = y2; y2 = y;
+ }
+ else /* x3 <= x2 <= x1 */
+ {
+ x = x1; x1 = x3; x3 = x;
+ y = y1; y1 = y3; y3 = y;
+ }
+ }
+ else
+ {
+ if (x2 < x1) /* x2 < x1 <= x3 */
+ {
+ x = x1; x1 = x2; x2 = x;
+ y = y1; y1 = y2; y2 = y;
+ }
+ else if (x2 > x3) /* x1 <= x3 < x2 */
+ {
+ x = x2; x2 = x3; x3 = x;
+ y = y2; y2 = y3; y3 = y;
+ }
+ /* else already sorted */
+ }
+
+ if (x1 < x3) /* draw */
+ {
+ fp_dy1 = ((y3 - y1) << 16) / (x3 - x1);
+ fp_y1 = (y1 << 16) + (1<<15) + (fp_dy1 >> 1);
+
+ if (x1 < x2) /* first part */
+ {
+ fp_dy2 = ((y2 - y1) << 16) / (x2 - x1);
+ fp_y2 = (y1 << 16) + (1<<15) + (fp_dy2 >> 1);
+ for (x = x1; x < x2; x++)
+ {
+ local_rb->lcd_vline(x, fp_y1 >> 16, fp_y2 >> 16);
+ fp_y1 += fp_dy1;
+ fp_y2 += fp_dy2;
+ }
+ }
+ if (x2 < x3) /* second part */
+ {
+ fp_dy2 = ((y3 - y2) << 16) / (x3 - x2);
+ fp_y2 = (y2 << 16) + (1<<15) + (fp_dy2 >> 1);
+ for (x = x2; x < x3; x++)
+ {
+ local_rb->lcd_vline(x, fp_y1 >> 16, fp_y2 >> 16);
+ fp_y1 += fp_dy1;
+ fp_y2 += fp_dy2;
+ }
+ }
+ }
+}
+
+#endif /* HAVE_LCD_BITMAP */
+
diff --git a/apps/plugins/lib/xlcd.h b/apps/plugins/lib/xlcd.h
new file mode 100644
index 0000000000..3f54643ec9
--- /dev/null
+++ b/apps/plugins/lib/xlcd.h
@@ -0,0 +1,34 @@
+/***************************************************************************
+* __________ __ ___.
+* Open \______ \ ____ ____ | | _\_ |__ _______ ___
+* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+* \/ \/ \/ \/ \/
+* $Id$
+*
+* Additional LCD routines not present in the core itself
+*
+* Copyright (C) 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 __XLCD_H__
+#define __XLCD_H__
+
+#include "plugin.h"
+
+#ifdef HAVE_LCD_BITMAP
+
+void xlcd_init(struct plugin_api* newrb);
+void xlcd_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3);
+
+#endif /* HAVE_LCD_BITMAP */
+#endif /* __XLCD_H__ */
+