Copyright (c) Borland International 1987,88
All Rights Reserved.
*/
#include <dos.h>
videodot(int x, int y, int color)
{
union REGS inr,outr;
inr.h.ah = 12; /* write pixel */
inr.h.al = color;
inr.x.cx = x;
inr.x.dx = y;
_int86(16,&inr,&outr); /* call video intr */
}
/* Draws a line on the screen from (x1, y1) to (x2, y2) in a selected color */
line(int x1, int y1, int x2, int y2, int color)
{
int xdelta; /* The change in x coordinates */
int ydelta; /* The change in y coordinates */
int xstep; /* The change to make in the x coordinate in each step */
int ystep; /* The change to make in the y coordinate in each step */
int change; /* The amount that the x or y coordinate has changed */
xdelta = x2 - x1; /* Calculate the change in x coordinates */
ydelta = y2 - y1; /* Calculate the change in y coordinates */
if (xdelta < 0)
{ /* The line will be drawn from right to left */
xdelta = -xdelta;
xstep = -1;
}
else /* The line will be drawn from left to right */
xstep = 1;
if (ydelta < 0)
{ /* The line will be drawn from bottom to top */
ydelta = -ydelta;
ystep = -1;
}
else /* The line will be drawn from top to bottom */
ystep = 1;
if (xdelta > ydelta) /* x changes quicker than y */
{
change = xdelta >> 1; /* change set to twice the value of xdelta */
while (x1 != x2) /* Draw until the terminating dot is reached */
{
videodot(x1, y1, color); /* Draw a dot on the screen */
x1 += xstep; /* Update x coordinate */
change += ydelta; /* Update change */
if (change > xdelta)
{
y1 += ystep; /* Update the y coordinate */
change -= xdelta; /* Reset change */
}
}
}
else /* y changes quicker than x */
{
change = ydelta >> 1; /* change set to twice the value of ydelta */
while (y1 != y2) /* Draw until the terminating dot is reached */
{
videodot(x1, y1, color); /* Draw a dot on the screen */
y1 += ystep; /* Update y coordinate */
change += xdelta; /* Update change */
if (change > ydelta)
/* If change is large enough to update the x coordinate */
{
x1 += xstep; /* Update the x coordinate */
change -= ydelta; /* Reset change */
}
}
}
} /* line */
cbar_0(int x1, int y1, int width, int height, int color)
{
int count; /* Counter variable used in filling bar */
int x2, y2, x3, y3, x4, y4; /* Additional points on the bar */
int wfactor; /* The number of pixels to shift the bar to the right */
int hfactor; /* The number of pixels to shift the bar up */
/*
The x and y values are as follows:
x1 x2 x3 x4
| | | |
| v | v
y2--|>/ÚÄÄÄÄ|ÄÄ¿
v/ ³ v /³
y1->ÉÍÍÍÍÍÍÍ»/ ³
º ³ º ³
º ³ º ³
º ³ º ³
º ³ º ³
º ³ º ³
y3---->ÀÄÄÄĺÄÄÙ
º / º /
y4->ÈÍÍÍÍÍÍͼ/
*/
wfactor = width / 5; /* figure out wfactor and hfactor */
hfactor = height / 12;
x2 = x1 + wfactor; /* compute the location of the points on the bar */
x3 = x1 + width;
x4 = x3 + wfactor;
y2 = y1 - hfactor;
y3 = y1 + height - hfactor;
y4 = y1 + height;
line(x1, y1, x3, y1, 2); /* draw front of the bar */
line(x3, y1, x3, y4, 2);
line(x3, y4, x1, y4, 2);
line(x1, y4, x1, y1, 2);
line(x3, y1, x4, y2, 2); /* draw side of the bar */
line(x4, y2, x4, y3, 2);
line(x4, y3, x3, y4, 2);
line(x1, y1, x2, y2, 2); /* draw top of the bar */
line(x2, y2, x4, y2, 2);
line(x1, y4, x2, y3, 3);
line(x2, y3, x4, y3, 3); /* draw back of the bar */
line(x2, y3, x2, y2, 3);
for (count = y1 + 1; count < y4; count++) /* fill in the bar */
line(x1 + 1, count, x3, count, color);
} /* cbar_0 */
All Rights Reserved.
*/
#include <dos.h>
videodot(int x, int y, int color)
{
union REGS inr,outr;
inr.h.ah = 12; /* write pixel */
inr.h.al = color;
inr.x.cx = x;
inr.x.dx = y;
_int86(16,&inr,&outr); /* call video intr */
}
/* Draws a line on the screen from (x1, y1) to (x2, y2) in a selected color */
line(int x1, int y1, int x2, int y2, int color)
{
int xdelta; /* The change in x coordinates */
int ydelta; /* The change in y coordinates */
int xstep; /* The change to make in the x coordinate in each step */
int ystep; /* The change to make in the y coordinate in each step */
int change; /* The amount that the x or y coordinate has changed */
xdelta = x2 - x1; /* Calculate the change in x coordinates */
ydelta = y2 - y1; /* Calculate the change in y coordinates */
if (xdelta < 0)
{ /* The line will be drawn from right to left */
xdelta = -xdelta;
xstep = -1;
}
else /* The line will be drawn from left to right */
xstep = 1;
if (ydelta < 0)
{ /* The line will be drawn from bottom to top */
ydelta = -ydelta;
ystep = -1;
}
else /* The line will be drawn from top to bottom */
ystep = 1;
if (xdelta > ydelta) /* x changes quicker than y */
{
change = xdelta >> 1; /* change set to twice the value of xdelta */
while (x1 != x2) /* Draw until the terminating dot is reached */
{
videodot(x1, y1, color); /* Draw a dot on the screen */
x1 += xstep; /* Update x coordinate */
change += ydelta; /* Update change */
if (change > xdelta)
{
y1 += ystep; /* Update the y coordinate */
change -= xdelta; /* Reset change */
}
}
}
else /* y changes quicker than x */
{
change = ydelta >> 1; /* change set to twice the value of ydelta */
while (y1 != y2) /* Draw until the terminating dot is reached */
{
videodot(x1, y1, color); /* Draw a dot on the screen */
y1 += ystep; /* Update y coordinate */
change += xdelta; /* Update change */
if (change > ydelta)
/* If change is large enough to update the x coordinate */
{
x1 += xstep; /* Update the x coordinate */
change -= ydelta; /* Reset change */
}
}
}
} /* line */
cbar_0(int x1, int y1, int width, int height, int color)
{
int count; /* Counter variable used in filling bar */
int x2, y2, x3, y3, x4, y4; /* Additional points on the bar */
int wfactor; /* The number of pixels to shift the bar to the right */
int hfactor; /* The number of pixels to shift the bar up */
/*
The x and y values are as follows:
x1 x2 x3 x4
| | | |
| v | v
y2--|>/ÚÄÄÄÄ|ÄÄ¿
v/ ³ v /³
y1->ÉÍÍÍÍÍÍÍ»/ ³
º ³ º ³
º ³ º ³
º ³ º ³
º ³ º ³
º ³ º ³
y3---->ÀÄÄÄĺÄÄÙ
º / º /
y4->ÈÍÍÍÍÍÍͼ/
*/
wfactor = width / 5; /* figure out wfactor and hfactor */
hfactor = height / 12;
x2 = x1 + wfactor; /* compute the location of the points on the bar */
x3 = x1 + width;
x4 = x3 + wfactor;
y2 = y1 - hfactor;
y3 = y1 + height - hfactor;
y4 = y1 + height;
line(x1, y1, x3, y1, 2); /* draw front of the bar */
line(x3, y1, x3, y4, 2);
line(x3, y4, x1, y4, 2);
line(x1, y4, x1, y1, 2);
line(x3, y1, x4, y2, 2); /* draw side of the bar */
line(x4, y2, x4, y3, 2);
line(x4, y3, x3, y4, 2);
line(x1, y1, x2, y2, 2); /* draw top of the bar */
line(x2, y2, x4, y2, 2);
line(x1, y4, x2, y3, 3);
line(x2, y3, x4, y3, 3); /* draw back of the bar */
line(x2, y3, x2, y2, 3);
for (count = y1 + 1; count < y4; count++) /* fill in the bar */
line(x1 + 1, count, x3, count, color);
} /* cbar_0 */