Felisp
84436a5ae0
http://my.svgalib.org/svgalib/svgalib-1.9.25.tar.gz http://my.svgalib.org/svgalib/
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/* A program to test any mode for linear. Default mode is G640x480x256 = 10
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** or parameters may be used giving modes as integers.
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** linp [mode mode ...]
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** Don Secrest Oct. 1998
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*/
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#include <vga.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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static void screen(int mode)
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{
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int bpp,bott,endp,linlen,i,j,bii,col,p;
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vga_modeinfo *minf;
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unsigned char *vbuf;
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int mem;
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if(mode == 0)
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{
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printf("Usage:lineart [mode mode ...]\n\nwhere mode is an integer.\n");
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return;
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}
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if(! vga_hasmode(mode)) {
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printf("Invalid mode %d\n",mode);
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return;
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}
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vga_setmode(mode);
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minf = vga_getmodeinfo(mode);
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if(! (minf->flags & CAPABLE_LINEAR)){
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vga_setmode(TEXT);
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printf("The mode %d is not capable of linear\n",mode);
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return;
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}
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vga_setpage(0);
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if(vga_setlinearaddressing() == -1) {
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vga_setmode(TEXT);
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printf("Could not set linear addressing for mode %d\n",mode);
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return;
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}
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bpp = minf->bytesperpixel;
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linlen = minf->width*bpp;
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bott = linlen*17; /* pointer 17 pixels wide. */
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endp = linlen*minf->height;
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mem = minf->linewidth*minf->height;
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/* Do random pixels */
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vbuf = vga_getgraphmem();
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printf("Memory mapped to %08x. Mode = %d.\n",(int) vbuf,mode);
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memset(vbuf,0,mem); /* Clear out 2 megabytes of memory, */
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for(i = 0;i < 100000;i++)
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{
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p = rand() % mem-2;
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*(vbuf + p) = rand() & 0xff;
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if(bpp > 1)
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*(vbuf + p + 1) = rand() & 0xff;
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if(bpp == 3)
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*(vbuf + p + 2) = rand() & 0xff;
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}
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/* Place marker at top left and bottem right. */
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for(i = 0;i < 44;i += bpp) {
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*(vbuf + i) = 0x60;
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*(vbuf + bott + i) = 0x60;
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*(vbuf + endp - i) = 0x60;
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bii = endp -1 -bott;
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*(vbuf + bii -i) = 0x60;
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if(bpp > 1) {
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*(vbuf + i + 1) = 0x60;
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*(vbuf + i + 1 + bott) = 0x60;
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*(vbuf - i - 1 + endp) = 0x60;
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*(vbuf - i - 1 + bii) = 0x60;
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}
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if(bpp == 3) {
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*(vbuf + i + 2) = 0x60;
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*(vbuf + i + 2 + bott) = 0x60;
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*(vbuf - i - 2 + endp) = 0x60;
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*(vbuf - i - 2 + bii) = 0x60;
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}
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col = (i == 0 || i >= 42)? 0x60:0;
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for(j = 1;j < 17;j++) {
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*(vbuf + i + linlen*j) = col;
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*(vbuf - i + endp -1 - linlen*j) = col;
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if(bpp > 1) {
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*(vbuf + i + 1 + linlen*j) = col;
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*(vbuf - i - 2 + endp - linlen*j) = col;
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}
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if(bpp == 3) {
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*(vbuf + i + 2 + linlen*j) = col;
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*(vbuf - i - 3 + endp - linlen*j) = col;
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}
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}
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}
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for(i = 5;i < 12;i += bpp)
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for(j = 4;j < 12;j++) {
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*(vbuf + i + linlen*j) = 0x3f;
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*(vbuf + endp - i - bpp - linlen*j) = 0x3f;
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}
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getchar(); /* Wait for a key punch */
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}
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int
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main(int argc,char *argv[])
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{
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int mode,c;
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vga_init();
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c=1;
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if(argc == 1)
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screen(10); /* G640x480x256 */
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else
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c = 0;
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while(argc > 1)
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{
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argc--;
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c++;
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if(isdigit(*argv[c]))
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mode = atoi(argv[c]);
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else if(*argv[c] == 'G')
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mode = vga_getmodenumber(argv[c]);
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else
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{
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printf("Unknown mode %s\n",argv[c]);
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continue;
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}
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screen(mode);
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}
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vga_setmode(TEXT);
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return 0;
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}
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