Diff: vt100.cpp

Revision:

0:94253645a02a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vt100.cpp	Mon Dec 01 12:48:02 2014 +0000
@@ -0,0 +1,216 @@
+#include "serial_api.h"
+#include "vt100.h"
+#include "mbed.h"
+
+#define BLACK   0
+#define RED     1
+#define GREEN   2
+#define YELLOW  3
+#define BLUE    4
+#define PURPLE  5
+#define CIAN    6
+#define WHITE   7
+
+char ESC = '\033' ;
+
+vt100::vt100(int baud)
+{
+   extern serial_t stdio_uart ;
+   serial_baud(&stdio_uart, baud) ;
+}
+
+vt100::~vt100()
+{
+}
+
+void vt100::cls(void)
+{
+    printf("%c[2J", ESC) ;
+    locate(1,1) ;
+}
+
+void vt100::locate(int x, int y)
+{
+    printf("%c[%d;%dH",ESC,y,x) ;
+}
+
+void vt100::putChar(int x, int y, char c)
+{
+    locate(x,y) ;
+    printf("%c",c) ;
+}
+
+void vt100::putStr(int x, int y, char *str)
+{
+    locate(x,y) ;
+    printf("%s", str) ;
+}
+
+void vt100::line(int x1, int y1, int x2, int y2, char c) 
+{
+    int x, y, dx, dy, w, h, step ;
+    dx = x2 - x1 ;
+    dy = y2 - y1 ;
+    w = (dx >= 0)? dx : -dx ;
+    h = (dy >= 0)? dy : -dy ;
+
+    if (dx == 0) { /* vertical line */
+        step = (dy >= 0) ? 1 : -1 ;
+        for (y = 0 ; y <= h ; y++) {
+            putChar(x1, y1 + (step * y), c) ;
+        }
+    } else if (dy == 0) { /* Horizontal line */
+        step = (dx >= 0) ? 1 : -1 ;
+        for (x = 0 ; x <= w ; x++) {
+            putChar(x1 + (step * x), y1, c) ;
+        }
+    } else {
+        if (w >= h) { /* use x as step */
+            step = (dx >= 0) ? 1 : -1 ;
+            for (x = 0 ; x <= w ; x++ ) {
+                putChar( x1 + step*x, y1 + ((2*x+1) * dy)/(2 * w), c) ;
+            }
+        } else { /* use y as step */
+            step = (dy >= 0) ? 1 : -1 ;
+            for (y = 0 ; y <= h ; y++ ) {
+                putChar( x1 + ((2*y+1) * dx)/(2*h), y1 + step*y,  c) ;
+            }
+        }
+    }
+}
+
+/****************************************************
+ *  frame(x1, y1, x2, y2)
+ *  draw textual frame
+ *  (x1,y1)                    (x2,y1)
+ *     +--------------------------+
+ *     |                          |
+ *     +--------------------------+
+ *  (x1,y2)                    (x2,y2)
+ */
+void vt100::frame(int x1, int y1, int x2, int y2)
+{
+    int tmp ;
+    if (x1 > x2) {
+        tmp = x1 ;
+        x1 = x2 ;
+        x2 = tmp ;
+    }
+    if (y1 > y2) {
+        tmp = y1 ;
+        y1 = y2 ;
+        y2 = tmp ;
+    }
+    putChar(x1, y1, '+') ;
+    line(x1+1,y1,x2-1,y1, '-') ; 
+    putChar(x2, y1, '+') ; 
+    line(x2,y1+1,x2,y2-1, '|') ; 
+    putChar(x2, y2, '+') ; 
+    line(x2-1,y2,x1+1,y2, '-') ; 
+    putChar(x1, y2, '+') ; 
+    line(x1,y2-1,x1,y1+1, '|') ; 
+}
+
+/***************************************************
+ *  circle(x, y, r, c) 
+ *  Based on Jack Elton Bresenham's
+ *  Midpoint circle algorithm.
+ *  http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
+  */
+void vt100::circle(int x0, int y0, int r, char c) 
+{
+    int f = 1 - r ;
+    int dFx = 1 ;
+    int dFy = -2 * r ;
+    int x = 0 ;
+    int y = r ;
+    
+    putChar(x0, y0 + r, c) ; 
+    putChar(x0, y0 - r, c) ; 
+    putChar(x0 + 2*r, y0, c) ; 
+    putChar(x0 - 2*r, y0, c) ; 
+    
+    while(x < y) {
+        if (f >= 0) {
+            y-- ;
+            dFy += 2 ;
+            f += dFy ;
+        }
+        x++ ;
+        dFx += 2 ;
+        f += dFx ;
+        putChar(x0 + 2*x, y0 + y, c) ; 
+        putChar(x0 - 2*x, y0 + y, c) ; 
+        putChar(x0 + 2*x, y0 - y, c) ; 
+        putChar(x0 - 2*x, y0 - y, c) ; 
+        putChar(x0 + 2*y, y0 + x, c) ; 
+        putChar(x0 - 2*y, y0 + x, c) ; 
+        putChar(x0 + 2*y, y0 - x, c) ; 
+        putChar(x0 - 2*y, y0 - x, c) ; 
+    }
+}
+
+int vt100::setFG(int newFG)
+{
+    int oldFG = foreground ;
+    printf("\033[3%dm", newFG) ;
+    foreground = newFG ;
+    return( oldFG ) ;
+}
+
+int vt100::getFG()
+{
+    return( foreground ) ;
+}
+
+int vt100::setBG(int newBG)
+{
+    int oldBG = background ;
+    printf("\033[4%dm", newBG) ;
+    return( oldBG ) ;
+}
+
+int vt100::getBG()
+{
+    return( background ) ;
+}
+    
+void vt100::black()
+{
+    setFG( BLACK ) ;
+}
+
+void vt100::red()
+{
+    setFG( RED ) ;
+}
+
+void vt100::green()
+{
+    setFG( GREEN ) ;
+}
+
+void vt100::yellow()
+{
+    setFG( YELLOW ) ;
+}
+
+void vt100::blue()
+{
+    setFG( BLUE ) ;
+}
+
+void vt100::purple()
+{
+    setFG( PURPLE ) ;
+}
+
+void vt100::cian()
+{
+    setFG( CIAN ) ;
+}
+
+void vt100::white()
+{
+    setFG( WHITE ) ;
+}
\ No newline at end of file