test256.c

VESA 图形编程的汇编子程序库

/****************************************************************************
*
*                          SuperVGA Test Library
*
*                   Copyright (C) 1993 SciTech Software
*                           All rights reserved.
*
* Filename:     $RCSfile: test256.c $
* Version:      $Revision: 1.2 $
*
* Language:     ANSI C
* Environment:  IBM PC (MSDOS)
*
* Description:  Simple program to test the operation of the SuperVGA
*               bank switching code and page flipping code for the
*               256 color SuperVGA video modes.
*
*               MUST be compiled in the large model.
*
* $Id: test256.c 1.2 1993/10/22 08:58:40 kjb release $
*
****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>
#include <conio.h>
#include "svga.h"

/*---------------------------- Global Variables ---------------------------*/

#include "version.c"

int     x,y;

/* External routines */

void _copyTest256(void);

/*----------------------------- Implementation ----------------------------*/

void moireTest(void)
/****************************************************************************
*
* Function:     moireTest
*
* Description:  Draws a simple Moire pattern on the display screen using
*               lines, and waits for a key press.
*
****************************************************************************/
{
    uchar   buf[80];
    int     i;

    clear();
    for (i = 0; i < maxx; i += 10) {
        line(maxx/2,maxy/2,i,0,i % maxcolor);
        line(maxx/2,maxy/2,i,maxy,(i+1) % maxcolor);
        }
    for (i = 0; i < maxy; i += 10) {
        line(maxx/2,maxy/2,0,i,(i+2) % maxcolor);
        line(maxx/2,maxy/2,maxx,i,(i+3) % maxcolor);
        }
    line(0,0,maxx,0,defcolor);
    line(0,0,0,maxy,defcolor);
    line(maxx,0,maxx,maxy,defcolor);
    line(0,maxy,maxx,maxy,defcolor);

    if (maxx != 319) {
        x = 80;
        y = 80;
        writeText(x,y,"Bank switching test",defcolor);  y += 32;
        sprintf(buf,"Video mode: %d x %d 256 color",maxx+1,maxy+1);
        writeText(x,y,buf,defcolor);    y += 16;
        sprintf(buf,"Maximum x: %d, Maximum y: %d, BytesPerLine %d, Pages: %d",
            maxx,maxy,bytesperline,maxpage+1);
        writeText(x,y,buf,defcolor);    y += 32;
        writeText(x,y,"You should see a colorful Moire pattern on the screen",defcolor);
        y += 16;
        }
    else {
        x = 40;
        y = 40;
        }
    writeText(x,y,"Press any key to continue",defcolor);
    y += 32;
    getch();
}

void readWriteTest(void)
/****************************************************************************
*
* Function:     readWriteTest
*
* Description:  Test the separate read/write bank routines if available.
*               We do this by copying the top 100 scanlines of video memory
*               to another location in video memory.
*
*               This test is desgined to work only in 640 wide video modes.
*
****************************************************************************/
{
    if (twobanks && (maxx == 639)) {
        _copyTest256();
        writeText(x,y,"To test the separate read/write banks, the top 100 scanlines of",defcolor);
        y += 16;
        writeText(x,y,"this display page should be moved to start at scanline 205.",defcolor);
        y += 16;
        writeText(x,y,"This ensures that a bank boundary will have been crossed",defcolor);
        y += 78;
        writeText(x,y,"Press any key to continue",defcolor);
        getch();
        }
}

void pageFlipTest(void)
/****************************************************************************
*
* Function:     pageFlipTest
*
* Description:  Animates a line on the display using page flipping if
*               page flipping is active.
*
****************************************************************************/
{
    int     i,j,istep,jstep,color,apage,vpage;
    char    buf[80];

    if (maxpage != 0) {
        vpage = 0;
        apage = 1;
        setActivePage(apage);
        setVisualPage(vpage);
        i = 0;
        j = maxy;
        istep = 2;
        jstep = -2;
        color = 15;
        while (!kbhit()) {
            setActivePage(apage);
            clear();
            sprintf(buf,"Page %d of %d", vpage+1, maxpage+1);
            if (maxx == 319) {
                writeText(0,80,"Page flipping - should be no flicker",defcolor);
                writeText(0,100,buf,defcolor);
                }
            else {
                writeText(80,80,"Page flipping - should be no flicker",defcolor);
                writeText(80,100,buf,defcolor);
                }
            line(i,0,maxx-i,maxy,color);
            line(0,maxy-j,maxx,j,color);
            vpage = ++vpage % (maxpage+1);
            setVisualPage(vpage);
            apage = ++apage % (maxpage+1);
            i += istep;
            if (i > maxx) {
                i = maxx-2;
                istep = -2;
                }
            if (i < 0)  i = istep = 2;
            j += jstep;
            if (j > maxy) {
                j = maxy-2;
                jstep = -2;
                }
            if (j < 0)  j = jstep = 2;
            }
        getch();                /* Swallow keypress */
        }
}

void testingComplete(void)
/****************************************************************************
*
* Function:     testingComplete
*
* Description:  Clears the first display page and puts up a message.
*
****************************************************************************/
{
    setActivePage(0);
    setVisualPage(0);
    clear();

    if (maxx == 319) {
        writeText(0,40,"Testing complete",defcolor);
        writeText(0,60,"press any key to return to text mode",defcolor);
        }
    else
        writeText(80,80,"Testing complete - press any key to return to text mode",defcolor);
    getch();
}

int queryCpu(void);

void main(void)
{
    int     i,choice,maxmenu;
    int     xres,yres,bitsperpixel,memmodel,maxpage;
    long    pagesize;
    int     menu[20];
    char    buf[80];

    if (queryCpu() < 4) {
        printf("This program contains '386 specific instructions, and will not work on\n");
        printf("this machine - sorry\n");
        }

    if (initSuperVGA() != 0x102) {
        printf("This program requires a VESA VBE 1.2 compatible SuperVGA. Try installing\n");
        printf("the Universal VESA VBE for your video card, or contact your video card\n");
        printf("vendor and ask for a suitable TSR\n");
        exit(1);
        }

    while (true) {
#ifdef  __TURBOC__
        clrscr();
#endif
        printf("256 color SuperVGA test program (Version %s)\n\n",version);
        printf("VBE OEM string: %s\n",OEMString);
        printf("Memory:         %dk\n",memory);
        printf("\n");
        printf("Separate read/write banks: %s\n", twobanks ? "Yes" : "No");
        printf("Extended page flipping:    %s\n", extendedflipping ? "Yes" : "No");
        printf("8 bit wide DAC support:    %s\n", widedac ? "Yes" : "No");
        printf("\n");
        printf("Which video mode to test:\n\n");

        maxmenu = 0;

        /* Add standard VGA modes to menu */

        getSuperVGAModeInfo(menu[maxmenu] = 0x13,&xres,&yres,&bytesperline,
                &bitsperpixel,&memmodel,&maxpage,&pagesize);
        printf("    [%2d] - %d x %d 256 color (%d page)\n",maxmenu++,
            xres,yres,maxpage+1);

        for (i = 0; modeList[i] != -1; i++) {
            /* Filter out the 256 color packed pixel video modes */

            if (!getSuperVGAModeInfo(modeList[i],&xres,&yres,&bytesperline,
                    &bitsperpixel,&memmodel,&maxpage,&pagesize))
                continue;
            if ((bitsperpixel == 8) && (memmodel == memPK)) {
                printf("    [%2d] - %d x %d 256 color (%d page)\n",maxmenu,
                    xres,yres,maxpage+1);
                menu[maxmenu++] = modeList[i];
                }
            }
        printf("    [ Q] - Quit\n\n");
        printf("Choice: ");

        gets(buf);
        if (buf[0] == 'q' || buf[0] == 'Q')
            break;

        choice = atoi(buf);
        if (0 <= choice && choice < maxmenu) {
            if (!setSuperVGAMode(menu[choice])) {
                printf("\n");
                printf("ERROR: Video mode did not set correctly!\n\n");
                printf("\nPress any key to continue...\n");
                getch();
                }
            else {
                moireTest();
                readWriteTest();
                pageFlipTest();
                testingComplete();
                restoreMode();
                }
            }
        }
}