This program as header class will able you to use graphics output quality of 600*800 solution with 256 color This mode is satisfatory to identify any image. This mode generally not provided by Turbo C++ Compiler Some function are also provided for the
It must be used only with MsDOS. Because some convention I have made regarding to memory model of program
Use it on WIN98 not on WinXP (if you want then on XP use only 640*480 resolution check function InitGraph() for more details……)
The program have three classes
- VDU
- Color
- Box with one LineStyle class use these classes as VDU for display any char at any pos with any color
- putChar(int row,int column ,char ch, ClassColor colorOfChar=DefaultColor)
- putString (int r,int c,char *ch,ClassColor clr=DefaultColor)
- putLong(int r,int c,long ch,ClassColor clr=DefaultColor)
- putDouble (int r,int c,double ch,ClassColor clr=DefaultColor)
- changeColor (int r, int c,ClassColor clr) –> It changes color of any position
use Color class for
- SetColor(unsigned char fg,unsigned char bg ,unsigned char bl);
- SetColor(ClassColor cc1);
- MakeColor(unsigned char fg,unsigned char bg ,unsigned char bl);
#include<dos.h>
#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#define round(a) ((int)(a+0.5))
void drawline(int xa, int ya, int xb, int yb);
const unsigned int MINX=0,MINY=0,MAXX=799,MAXY=599;
const unsigned int MIDX=(MAXX+1)/2,MIDY=(MAXY+1)/2;
unsigned int CentreX=MIDX,CentreY=MIDY;
char huge Timg[MAXX][MAXY];
unsigned char huge ColorLUT[768];
union REGS in, out,reg ;
union SREGS inreg ;
// —-pellate setting
typedef unsigned int Word;
typedef unsigned char Byte;
typedef struct{
Byte Red, Grn, Blu;
}RGB;class sColor
{};
typedef RGB PaletteRegister[255];
PaletteRegister Color,colorP;
void ClearPalette(PaletteRegister Color){
Word i;
for(i=0; i<=255; i++){
Color[i].Red=0;
Color[i].Grn=0;
Color[i].Blu=0;
}
}void SetPalette(PaletteRegister Hue)
{
reg.x.ax=0×1012;
segread(&inreg);
inreg.es=inreg.ds;
reg.x.bx=0;reg.x.cx=256;
reg.x.dx=(int)&Hue[0];
int86x(0×10,®,®,&inreg);
}void InitPalette(PaletteRegister Color)
{
Word i=0;
for(int r=0;r<6;r++)
for(int g=0;g<6;g++)
for(int b=0;b<6;b++){
Color[i].Red=r*51;
Color[i].Grn=g*51;
Color[i].Blu=b*51;
i++;
}
}//————————————–
// ————-
class CGBase{
int gd,gm,gr;
union REGS i, o,reg;
struct SREGS inreg;
int fc,bc;
void setsvga ( int m ){
i.x.ax = 0×4f02 ;
i.x.bx = m ;
int86 ( 16, &i, &o ) ;
}
void set_vesa_seg ( int bank_number ){
union REGS i, o ;
i.x.ax = 0×4F05 ;
i.x.bx = 0 ;
i.x.dx = bank_number ;
int86 ( 16, &i, &o ) ;
}
void putpixel ( int x, int y, unsigned char color ){
unsigned short curr_vesa_seg = 0xffff ;
unsigned short vesa_seg,vesa_offset ;
unsigned long seg_size = 0xffff + 1L ;
unsigned long offset ;
offset = ( ( unsigned long ) y * ( unsigned long ) (MAXX+1) + ( unsigned long ) x ) ;
vesa_seg = offset / seg_size ;
vesa_offset = offset % seg_size ;
if ( vesa_seg != curr_vesa_seg ){
set_vesa_seg ( vesa_seg ) ;
curr_vesa_seg = vesa_seg ;
}
pokeb ( 0xA000, ( unsigned ) vesa_offset, color) ;
}
void line(int xa, int ya, int xb, int yb,int c){
int dx=xb-xa,dy=yb-ya,steps,k;
float xi,yi,x=xa,y=ya;
if(abs(dx) > abs(dy))
steps=abs(dx);
else
steps=abs(dy);
xi=dx/(float)steps;
yi=dy/(float)steps;
putpixel(round(x),round(y),c);
for(k=0;k<steps;k++){
x+=xi;
y+=yi;
putpixel(round(x),round(y),fc);
}
}
void InitGraph(){
setsvga ( 0×103) ;// *** fro Win XP use 0×101 for 640*480*256
InitPalette(colorP);
SetPalette(colorP);
// 103 for 800*600*256
}
void FinishGraph(){
setsvga (0×03) ;
}
void Reset(){
FinishGraph();
InitGraph();
Boundary(1);
Axis(2);
}
public:
CGBase(){
InitGraph();
ClearPort();
ClearPort();
Axis(GREEN);
fc=1;
bc=0;
}
void putImage(int left,int top,int right,int bot){
unsigned short curr_vesa_seg = 0xffff ;
unsigned short vesa_seg,vesa_offset ;
unsigned long seg_size = 0xffff + 1L ;
unsigned long offset ;
int t;
if(left>right){
t=left;
left=right;
right=t;
}
if(top>bot){
t=bot;
bot=top;
top=t;
}
char color;
for(int x=left ; x<=right;x++)
for(int y=top ; y<=bot;y++){
color=Timg[x][y];
offset = ( ( unsigned long ) y * ( unsigned long ) (MAXX+1) + ( unsigned long ) x ) ;
vesa_seg = offset / seg_size ;
vesa_offset = offset % seg_size ;
if ( vesa_seg != curr_vesa_seg ){
set_vesa_seg ( vesa_seg ) ;
curr_vesa_seg = vesa_seg ;
}
pokeb ( 0xA000, ( unsigned ) vesa_offset, color ) ;
}
}
~CGBase(){
FinishGraph();
}
void ClearPort(){
for( int i=0;i<MAXX;i++)
for(int j=0;j<MAXY;j++)
Timg[i][j]=0;
putImage(MINX,MINY,MAXX,MAXY);
}
void PutPixel(int x, int y , int c ,int rx=CentreX,int ry=CentreY){
if( (rx+x)<MAXX &&(rx+x)>MINX && (ry-y)<MAXY &&(ry-y)>MINY )
putpixel(rx+x,ry-y,c);
}
void Axis(int c){
LineAbs(CentreX,MINY,CentreX,MAXY,c);
LineAbs(MINX,CentreY,MAXX,CentreY,c);
}
void Boundary(int c){
RectangleAbs(MINX,MINY,MAXX,MAXY,c);
}
void LineAbs(int x1,int y1,int x2,int y2,int c=WHITE){
SetColor(c);
line(x1,y1,x2,y2,c);
}
void RectangleAbs(int x1,int y1,int x2,int y2,int c=WHITE){
SetColor(c);
Line(x1,y1,x1,y2,c);
Line(x1,y2,x2,y2,c);
Line(x2,y2,x2,y1,c);
Line(x2,y1,x1,y1,c);
}
// line according to coordinates
void Line(int x1,int y1,int x2,int y2,int c){
SetColor(c);
line(x1+CentreX,CentreY-y1,x2+CentreX,CentreY-y2,c);
}
void Circle(int xCenter, int yCenter, int radius,unsigned char color=WHITE){
float x=0;
float y=radius;
float p=1-radius;//p=(x+1)^2+(y-1/2)^2-r^2
while(x <= y){
PutPixel(xCenter+x, yCenter+y, color);
PutPixel(xCenter-x, yCenter+y, color);
PutPixel(xCenter+x, yCenter-y, color);
PutPixel(xCenter-x, yCenter-y, color);
PutPixel(xCenter+y, yCenter+x, color);
PutPixel(xCenter-y, yCenter+x, color);
PutPixel(xCenter+y, yCenter-x, color);
PutPixel(xCenter-y, yCenter-x, color);
x+=1;
if(p < 0)
p = p + 2 * (x + 1) – 1; //x=x+1,y=y
else{
y–;
p = p + 2 * (x – y) + 1; //x=x+1,y=y-1
}
}
}
void Rectangle(int x1,int y1,int x2,int y2,int c ){
SetColor(c);
RectangleAbs(x1+CentreX,CentreY-y1,x2+CentreX,CentreY-y2,c);
}
void SetColor(unsigned int c){
fc=c;
}
void SetBkColor(unsigned int c){
bc=c;
}
};// a brief example for How to intiate th
// e code
void main(){
int i=0,j=0,k=0,c=0;
getch();
CGBase g;
for(i=0;i<=275;i++){
g.Circle(0,0,i,i);
}
getch();
}