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authorIan C <ianc@noddybox.co.uk>2010-11-26 15:00:08 +0000
committerIan C <ianc@noddybox.co.uk>2010-11-26 15:00:08 +0000
commit5601353fc9cd66dbcca4d06fc7068af853317442 (patch)
tree88a85955b3fce3c4b23dbbeca623020328fb50e7 /source/textmode.c
parent1007ee9a4027826cf9c9067e0f1d1e1be1123b1f (diff)
Copied DS81 files as a baselineHEADmaster
Diffstat (limited to 'source/textmode.c')
-rw-r--r--source/textmode.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/source/textmode.c b/source/textmode.c
new file mode 100644
index 0000000..795fc4f
--- /dev/null
+++ b/source/textmode.c
@@ -0,0 +1,157 @@
+/*
+ ds81 - Nintendo DS ZX81 emulator.
+
+ Copyright (C) 2007 Ian Cowburn <ianc@noddybox.co.uk>
+
+ 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 program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ $Id: textmode.c 42 2007-03-02 23:18:38Z ianc $
+*/
+
+#include <nds.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "textmode.h"
+
+/* ---------------------------------------- STATIC DATA
+*/
+static int mapw;
+static int maph;
+static uint16 *text;
+static int is_rot;
+static void (*draw_string)(const char *str, int x, int y);
+
+
+/* ---------------------------------------- PRIVATE INTERFACES
+*/
+static inline void Plot_Text(int x, int y, int c)
+{
+ int xw;
+ int yw;
+
+ xw = x/32;
+ yw = y/32;
+ x %= 32;
+ y %= 32;
+
+ *(text + x + y*32 + (xw+yw) * 1024) = c;
+}
+
+
+static inline void Plot_RS(int x, int y, int c)
+{
+ uint16 ch;
+ int odd;
+ uint16 *off;
+
+ odd = x&1;
+
+ off = text + x/2 + y*mapw/2;
+
+ ch = *off;
+
+ if (odd)
+ {
+ ch = (c<<8) | (ch&0xff);
+ }
+ else
+ {
+ ch = c | (ch&0xff00);
+ }
+
+ *off = ch;
+}
+
+
+static void Text_Put(const char *str, int x, int y)
+{
+ while(*str && x<mapw)
+ {
+ Plot_Text(x,y,*str - 32);
+ x++;
+ str++;
+ }
+}
+
+static void RS_Put(const char *str, int x, int y)
+{
+ while(*str && x<mapw)
+ {
+ Plot_RS(x,y,*str - 32);
+ x++;
+ str++;
+ }
+}
+
+/* ---------------------------------------- PUBLIC INTERFACES
+*/
+void TM_Init(uint16 *vram, int map_width, int map_height, int map_is_rotation)
+{
+ text = vram;
+
+ mapw = map_width;
+ maph = map_height;
+
+ is_rot = map_is_rotation;
+
+ draw_string = map_is_rotation ? RS_Put : Text_Put;
+
+ TM_Cls();
+}
+
+
+void TM_Cls(void)
+{
+ uint16 *scr;
+ int f;
+
+ scr = text;
+
+ if (is_rot)
+ {
+ for(f=0;f<mapw*maph/2;f++)
+ {
+ *scr++=0;
+ }
+ }
+ else
+ {
+ for(f=0;f<mapw*maph;f++)
+ {
+ *scr++=0;
+ }
+ }
+}
+
+
+void TM_Put(int x, int y, const char *str)
+{
+ draw_string(str,x,y);
+}
+
+
+void TM_printf(int x, int y, const char *format, ...)
+{
+ char buff[128];
+ va_list va;
+
+ va_start(va,format);
+ vsnprintf(buff,sizeof buff,format,va);
+ va_end(va);
+
+ draw_string(buff,x,y);
+}