Header file:
graphics.h
Synopsis:
void setrgbpalette(int colornum, int red, int green, int blue);
Description:
setrgbpalette() defines color for IBM-8514 graphics card. Here, colornum is the palette entry to be loaded, while red, green and blue indicates the component color of the palette entry.
setrgbpalette function in c graphics
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <dos.h>
int main(void) {
/* set the driver and graphic mode */
int graphicDriver = VGA, graphicMode = VGAHI;
int err, i, x1, x2;
struct palettetype palette;
/* initialize graphics and local variables */
initgraph(&graphicDriver, &graphicMode,
"C:/TURBOC3/BGI");
/* read result of initialization */
err = graphresult();
if (err != grOk) {
/* an error occurred */
printf("Graphic Error: %s\n",
grapherrormsg(err));
getch();
return 0;
}
/* grab a copy of the palette */
getpalette(&palette);
/* create gray scale */
for (i=0; i<palette.size; i++)
setrgbpalette(palette.colors[i], i*2, i*2, i*2);
/* display the gray scale */
x1 = 0, x2 = getmaxx() / 16;
for (i=0; i<palette.size; i++) {
setfillstyle(i % 12, i);
bar(x1, 0, x2, getmaxy());
x1 = x2;
x2 = x2 + getmaxx() / 16;
delay(400);
}
/* clean up */
getch();
closegraph();
return 0;
}
Output: (setrgbpalette built-in function in c graphics.h)
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