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GRAB/PALVIEW.C

@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <bios.h>
+#include <stdlib.h>
+
+#define	pset(xx,yy,cc) *(vram+(xx)+(yy)*320)=(cc);
+
+union	REGS	reg;
+
+main(int argc,char *argv[])
+{
+	int	minr=999,ming=999,minb=999;
+	int	maxr=0,maxg=0,maxb=0;
+	int	a,b,c;
+	int	xr,xg,xb;
+	int	div=1;
+	int	x,y;
+	long	start=0;
+	char far *vram=(char far *)0xa0000000;
+	FILE	*f1;
+	if(argc==1)
+	{
+		printf("usage: VIEWPAL <filename> [byte to start] [4 to divide]\n");
+		return(0);
+	}
+	f1=fopen(argv[1],"rb");
+	if(f1==NULL) return(0);
+	if(argc>=3) start=atol(argv[2]);
+	if(argc>=4) { div=4; }
+	fseek(f1,start,SEEK_SET);
+	reg.x.ax=0x13;
+	int86(0x10,&reg,&reg);
+	
+	for(y=0;y<16;y++) for(x=0;x<16;x++)
+	{
+		a=x*16+y;
+		for(b=0;b<4;b++) for(c=0;c<4;c++)
+		{
+			pset(x*4+b,y*4+c,a);
+		}
+	}
+	outp(0x3c8,0);
+	for(a=0;a<256;a++)
+	{
+		xr=getc(f1)/div;
+		xg=getc(f1)/div;
+		xb=getc(f1)/div;
+		outp(0x3c9,xr);
+		outp(0x3c9,xg);
+		outp(0x3c9,xb);
+		if(xr<minr) minr=xr;
+		if(xg<ming) ming=xg;
+		if(xb<minb) minb=xb;
+		if(xr>maxr) maxr=xr;
+		if(xg>maxg) maxg=xg;
+		if(xb>maxb) maxb=xb;
+	}
+	fclose(f1);
+	
+	getch();
+	reg.x.ax=0x3;
+	int86(0x10,&reg,&reg);
+	printf("Min: R:%-3i G:%-3i B:%-3i\n",minr,ming,minb);
+	printf("Max: R:%-3i G:%-3i B:%-3i\n",maxr,maxg,maxb);
+}