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//Varianta C++
#include <conio.h>
#include <graphics.h>
#include "svga.h"
typedef int Operator[3][3];
int gdriver, gmode;
int ImageWidth,ImageHeight;
char FileName[128];
Operator DeltaC={{0,0,0},{-1,1,0},{0,0,0}};
extern "C" void _Cdecl svga_driver(void);
void LoadBitmap(int x,int y,char *nume);
void ApplyOperator(Operator op);
int main(void)
{
printf("Alegeti un fisier .bmp 256color: " );
scanf("%s",FileName);
/* install the user defined driver into the system */
gdriver = installuserdriver("svga", NULL);
/* register the driver with the graphics system */
registerbgidriver(svga_driver);
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "" );
setgraphmode(SVGA_640X480);
//Setup the palette as Grayscale
for(int i=0;i<256;i++){
setpalette(i,i);
setrgbpalette(i,i,i,i);
}
LoadBitmap( 10,100,FileName);
getch();
ApplyOperator(DeltaC);
getch();
/* clean up */
closegraph();
return 0;
}
void LoadBitmap(int x,int y,char *nume)
{
unsigned Width,BitW,Lines; //Latime,Bytes per linie,Nr. de linii
unsigned char px; //un byte citit
int i,j; //contoare
FILE *file;
file=fopen(nume,"rb" );
fseek(file,18,SEEK_SET); //citesc latimea
fread(&Width,2,1,file);
fseek(file,22,SEEK_SET); //numarul de linii
fread(&Lines,2,1,file);
BitW= (Width+(Width%2));
BitW= (BitW%4)?(BitW/4+1)*4:BitW;
ImageWidth=Width;
ImageHeight=Lines;
fseek(file,1078,SEEK_SET); //aici incepe imaginea
for(i=Lines;i>=1;i--) //liniile sunt de jos in sus
for(j=1;j<=BitW;j++)
{
fread(&px,1,1,file);
if(j-1<=Width)
putpixel(x+j-1,y+i-1,px);
}
fclose(file);
}
void ApplyOperator(Operator op)
{
int x,y,i,j,px;
for(y=1;y<ImageHeight-1;y++)
for(x=1;x< ImageWidth-1;x++)
{
px=0;
for(i=0;i<3;i++)
for(j=0;j<3;j++)
px+=getpixel(10+x-1+j,100+y-1+i)*op[i][j];
putpixel(330+x,100+y,px);
}
}
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