返回有关当前调色板的信息

[c]代码库

#include <graphics.h> 
#include <stdlib.h> 
#include <stdio.h> 
#include <conio.h> 

int main(void) 
{ 
/* request auto detection */ 
   int gdriver = DETECT, gmode, errorcode; 
   struct palettetype pal; 
   char psize[80], pval[20]; 
   int i, ht; 
   int y = 10; 

/* initialize graphics and local variables */ 
   initgraph(&gdriver, &gmode, ""); 

/* read result of initialization */ 
   errorcode = graphresult(); 
/* an error occurred */ 
   if (errorcode != grOk) 
   { 
      printf("Graphics error: %s\n", 
             grapherrormsg(errorcode)); 
      printf("Press any key to halt:"); 
      getch(); 
/* terminate with an error code */ 
      exit(1); 
   } 

/* grab a copy of the palette */ 
   getpalette(&pal); 

/* convert palette info. into strings */ 
   sprintf(psize, "The palette has %d \ 
           modifiable entries.", pal.size); 

/* display the information */ 
   outtextxy(0, y, psize); 
   if (pal.size != 0) 
   { 
      ht = textheight("W"); 
      y += 2*ht; 
      outtextxy(0, y, "Here are the current \ 
  values:"); 
      y += 2*ht; 
      for (i=0; i<pal.size; i++, y+=ht) 
      { 
  sprintf(pval, 
   "palette[%02d]: 0x%02X", i, 
   pal.colors[i]); 
  outtextxy(0, y, pval); 
      } 
   } 

/* clean up */ 
   getch(); 
   closegraph(); 
   return 0; 
}