cleanup and refactoring. abstracting away console

1 files changed, 156 insertions, 0 deletions

diff --git a/video/console.c b/video/console.c
new file mode 100644
index 0000000..c89424b
--- /dev/null
+++ b/video/console.c
@@ -0,0 +1,156 @@
+#include "console.h"
+#include "kernel/config.h"
+
+//#define FOOLOS_CONSOLE
+
+static int posx=0;
+static int posy=0;
+
+// helper_funcs
+
+void print_char_col(int x, int y, char c, char col)
+{
+#ifdef FOOLOS_CONSOLE
+    char* video_mem=(char *)SCR_VIDEOMEM+(x+y*SCR_REAL_WIDTH)*2;
+    video_mem[0]=c;
+    video_mem[1]=col;
+#endif
+}
+
+void print_char(int x, int y, char c)
+{
+    print_char_col(x,y,c,SCR_WHITE);
+}
+
+void print_single_num(int i)
+{
+   if(i<10)print_char_col(posx,posy,'0'+i,SCR_GREEN); 
+   else if(i<16)print_char_col(posx,posy,'A'+i-10,SCR_GREEN); 
+   posx++;
+   if(posx>=SCR_WIDTH)scr_nextline();
+
+}
+
+void print_str_col(int x,int y,char *str, char col)
+{
+
+    while(*str!=0)
+    {
+	print_char_col(x++,y,*(str++),col);
+    }
+
+}
+
+void print_str(int x,int y,char *str)
+{
+    print_str_col(x,y,str,SCR_WHITE);
+}
+
+
+// 
+//
+void scr_clear()
+{
+    int x,y;
+
+    for(x=0;x<SCR_WIDTH;x++)
+	for(y=0;y<SCR_HEIGHT;y++)
+	{
+	    print_char_col(x,y,'@',SCR_BLUE);
+	    
+	}
+
+    posx=posy=0;
+
+}
+
+void scr_put_string_nl(char *str)
+{
+    scr_put_string(str);
+    scr_nextline();
+}
+
+void scr_nextline()
+{
+#ifdef FOOLOS_CONSOLE
+    int i,x;
+
+    posx=0;
+    posy++;
+
+    if(posy>SCR_HEIGHT-2)
+    {	
+	for(i=1;i<SCR_HEIGHT-1;i++)
+	{
+	    
+	    for(x=0;x<SCR_WIDTH;x++)
+	    { 
+		char* video_mem=(char *)SCR_VIDEOMEM+((x)+(i-1)*SCR_REAL_WIDTH)*2;
+		char* video_mem2=(char *)SCR_VIDEOMEM+((x)+i*SCR_REAL_WIDTH)*2;
+		*video_mem=*video_mem2;
+		*(video_mem+1)=*(video_mem2+1);
+		//clear  last line
+		if(i==SCR_HEIGHT-2)
+		{
+		    print_char_col(x,i,'@',SCR_LBLUE);
+		    
+
+		}
+	    }
+	}
+
+	posy--;
+    }
+#endif
+}
+
+void scr_put_char(char ch,char col)
+{
+
+    print_char_col(posx,posy,ch,SCR_WHITE); 
+    posx++;
+    if(posx>=SCR_WIDTH)scr_nextline();
+}
+
+
+void scr_put_hex(uint16_t val)
+{
+
+    int i;
+
+    scr_put_string("0x");
+
+    for(i=0;i<4;i++)
+    {
+	print_single_num((val&0xf000)>>12);
+	val=val << 4;
+
+    }
+
+}
+
+
+void scr_put_hex32(uint32_t val)
+{
+    scr_put_string("[");
+    scr_put_hex(val>>16);   
+    scr_put_string(",");
+    scr_put_hex(val&0xffff);
+    scr_put_string("]");
+}
+
+void scr_put_string(char *str)
+{
+    while(*str!=0)
+    {
+	scr_put_char(*(str++),SCR_WHITE);
+    }
+}
+
+void scr_backspace()
+{
+    if(posx==0)return;
+    print_char_col(posx-1,posy,'@',SCR_LGREEN);
+    posx--;
+
+}