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DOS真彩色模式下真彩色图像显示技术毕业(4)

2015-06-03 01:35
unsigned char numberofimagepages;
unsigned char Reserved;
unsigned char x;
} modeinfo;
void SetVesaMode(unsigned int mode);
void VesaInfo(unsigned int mode);
void map(void);
void Selectpage(unsigned int page);
void highcolor(void);
void truecolor(void);
main() // 主函数
{ PCXHEAD header;
char *filename,c;
printf("Please enter the 640X480 24bit RGB mode PCX fil
ename: ");
gets(filename);
if((fp=fopen(filename, "rb"))==NULL)
{
SetVesaMode(0x03);
puts("File reading error");
exit(1);
}

fread( (char *) &header, 1, sizeof(PCXHEAD), fp);
width = header.bytes-perline;
height = header.ymax - header.ymin + 1;
printf("Image information: Width=%d, Height=%d",width,h
eight);
if ((header.bits-perpixel==8)&&(header.color-planes==3)
) {
printf("
Type : 24bits RGB true colors");
printf("1...Emulating display 16M true color image with
64K high color");
printf("2...Display of 16M true color image");
printf("Press select 1 or 2 : ");
if ((c=getch())=='1') {
highcolor();
SetVesaMode(0x03);
}
else if (c=='2') {
truecolor();
SetVesaMode(0x03);
}
else {
printf("This is not high-color & true-color image !")
;
exit(1);
}
}
fclose(fp);
return 0;
}
// 设置VESA BIOS扩展模式函数
void SetVesaMode(unsigned int mode)
{ union REGS r;
unsigned int setmode=1;
r.x.ax=0x4f02;
r.x.bx=mode;
int86(0x10,&r,&r);
if (r.x.ax!=0x4f)
setmode=0;
else VesaInfo(mode);
Curpage=0xffff;
return(setmode);
}
// 返回VESA编程信息函数
void VesaInfo(unsigned int mode)
{ union REGS r;