发信人: tiger_x()
整理人: wenbobo(2002-08-13 10:45:45), 站内信件
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我非高手,但给个例子你看看吧!(不全的哟^_^)不对可别怪我.
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include "vga.h"
#include "image.h"
#include "error.h"
#include "xmngr.h"
extern void SetRegValue(unsigned uport,unsigned char index,unsigned ch
ar value);
int save_page(char *name)
{
int i;
FILE *fp;
void far *sVram=(void far *)0xa0000000;
if((fp=fopen(name, "wb"))==NULL)
return ERROR_OPENFILE;
SetRegValue(GC_INDEX,GC_ENABLE_SET_RESET,0);
SetRegValue(GC_INDEX,GC_BITMASK,0xff);
SetRegValue(GC_INDEX,GC_ROTATE,0);
for(i=0; i<4; i++)
{
SetRegValue(SC_INDEX,SC_MAP_MASK,(1<<i));
SetRegValue(GC_INDEX,GC_READ_MAP,i);
fwrite(sVram,(unsigned int)38400l,1,fp);
}
fclose(fp);
SetRegValue(SC_INDEX,SC_MAP_MASK,0x0f);
return 0;
}
int load_page(char *name)
{
int i, j;
FILE *fp;
char far *sVram=(char far *)0xa0000000;
int y1=60, y2=447 ;
if((fp=fopen(name, "rb"))==NULL)
return ERROR_OPENFILE;
SetRegValue(GC_INDEX,GC_ENABLE_SET_RESET,0);
SetRegValue(GC_INDEX,GC_BITMASK,0xff);
SetRegValue(GC_INDEX,GC_ROTATE,0);
for(i=0; i<4; i++)
{
SetRegValue(GC_INDEX,GC_READ_MAP,i);
SetRegValue(SC_INDEX,SC_MAP_MASK,(1<<i));
fseek( fp, i*38400L+y1*80L-1, SEEK_SET ) ;
for( j=y1; j<y2; j++ ) {
fseek( fp, 2, SEEK_CUR ) ;
fread(sVram+j*80+1,(unsigned int)78,1,fp);
}
}
fclose(fp);
SetRegValue(SC_INDEX,SC_MAP_MASK,0x0f);
return 0;
}
unsigned long xImageSize(int xstart,int ystart,int xend,int yend)
{
return ((unsigned long)(yend - ystart + 1)) * 4
*((unsigned long)((xend/8) - (xstart/8) + 2)) + (4 * sizeof(int));
}
unsigned xGetImage(int xstart,int ystart,int xend,int yend)
{
int i,j;
unsigned char far *sVram=(void far *)0xa0000000;
long dwImagesize;
unsigned hImage,wLinebytes,wVramofs;
long dwImageofs;
int a[4];
if(xstart>=xend || ystart>=yend)
return XMCB_NULL_ENTRY;
dwImagesize=xImageSize(xstart,ystart,xend,yend);
hImage=xAlloc(dwImagesize);
if(hImage==XMCB_NULL_ENTRY)
return XMCB_NULL_ENTRY;
a[0]=xstart;a[1]=ystart;a[2]=xend;a[3]=yend;
Dos2X(hImage,0,a,4*sizeof(int));
X2Dos(hImage,0,a,4*sizeof(int));
dwImageofs=4*sizeof(int);
SetRegValue(GC_INDEX,GC_ENABLE_SET_RESET,0);
SetRegValue(GC_INDEX,GC_BITMASK,0xff);
SetRegValue(GC_INDEX,GC_ROTATE,0);
wLinebytes=((xend/8) - (xstart/8) +1);
if (wLinebytes&0x01)
wLinebytes++;
for(i=0; i<4; i++)
{
wVramofs=xstart/8+80*ystart;
SetRegValue(SC_INDEX,SC_MAP_MASK,(1<<i));
SetRegValue(GC_INDEX,GC_READ_MAP,i);
for(j=ystart;j<=yend;j++,wVramofs+=80,dwImageofs+=wLinebytes)
Dos2X(hImage,dwImageofs,sVram+wVramofs,wLinebytes);
}
SetRegValue(SC_INDEX,SC_MAP_MASK,0x0f);
return hImage;
}
int xPutImage(unsigned hImage)
{
int i,j;
unsigned char far *sVram=(void far *)0xa0000000;
unsigned wLinebytes,wVramofs;
long dwImageofs;
int a[4];
int xstart,ystart,xend,yend;
unsigned char buf[80];
if(xSize(hImage) <= (4*sizeof(int)))
return ERROR_XIMAGE_INVALID;
X2Dos(hImage,0,a,4*sizeof(int));
xstart=a[0];ystart=a[1];xend=a[2];yend=a[3];
if(xstart>=xend || ystart>=yend)
return ERROR_XIMAGE_LOCATOR;
if(xImageSize(xstart,ystart,xend,yend) != xSize(hImage))
return ERROR_XIMAGE_SIZE;
dwImageofs=4*sizeof(int);
SetRegValue(GC_INDEX,GC_ENABLE_SET_RESET,0);
SetRegValue(GC_INDEX,GC_BITMASK,0xff);
SetRegValue(GC_INDEX,GC_ROTATE,0);
wLinebytes=((xend/8) - (xstart/8) +1);
if (wLinebytes&0x01)
wLinebytes++;
for(i=0; i<4; i++)
{
wVramofs=xstart/8+80*ystart;
SetRegValue(SC_INDEX,SC_MAP_MASK,(1<<i));
SetRegValue(GC_INDEX,GC_READ_MAP,i);
for(j=ystart;j<=yend;j++,wVramofs+=80,dwImageofs+=wLinebytes)
X2Dos(hImage,dwImageofs,sVram+wVramofs,wLinebytes);
}
SetRegValue(SC_INDEX,SC_MAP_MASK,0x0f);
return hImage;
}
IMAGE.h
#ifndef __IMAGE_H
#define __IMAGE_H
int save_page(char *name);
int load_page(char *name);
unsigned long xImageSize(int xstart,int ystart,int xend,int yend);
unsigned xGetImage(int xstart,int ystart,int xend,int yend);
int xPutImage(unsigned hImage);
#endif
【 在 imouse (A.C.Milan) 的大作中提到: 】
: 或者说明一下方法.本人在编显示图片的程序时,找不到有关资料,望各位大虾助一
: 臂之力.
--
*********
* Tiger *
*********
http://jtiger.126.com
※ 修改:．tiger_x 于 May 27 02:28:30 修改本文．[FROM: 202.104.46.196]
※ 来源:．月光软件站 http://www.moon-soft.com．[FROM: 202.104.46.196]
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