BMP.rar_bc++

#include<io.h> #include<stdio.h> #include<dos.h> #include<string.h> #include<math.h> #include<stdio.h> #include<bios.h> #include<mem.h> #include<fcntl.h> #include<stdlib.h> #include<conio.h> #define SCREEN_HEIGHT 200 #define SCREEN_WIDTH 320 #define PALETTE_MASK 0x3c6 #define PALETTE_REGISTER_RD 0x3c7 #define PALETTE_REGISTER_WR 0x3c8 #define PALETTE_DATA 0x3c9 unsigned char far *video_buffer=(char far *)0xA0000000L; #define VGA256 0x13 #define TEXT_MODE 0x03 typedef struct BMP_file { unsigned int bfType; unsigned long bfsize; unsigned int Reserve1; unsigned int reserve2; unsigned long bfOffset; } bitmapfile; typedef struct BMP_info { unsigned long biSize; unsigned long biWidth; unsigned long biHight; unsigned int biPlanes; unsigned int biBitcount; unsigned long biCompression; unsigned long biSizeImage; unsigned long biXpolsPerMeter; unsigned long biYpelsPerMeter; unsigned long biClrUsed; unsigned long biClrImportant; } bitmapinfo; typedef struct RGB_BMP_typ { unsigned char blue; unsigned char green; unsigned char red; unsigned char reserved; } RGB_BMP,*RGB_BMP_ptr; typedef struct bmp_picture_typ { bitmapfile file; bitmapinfo info; RGB_BMP palette[256]; char far *buffer; } bmp_picture,*bmp_picture_ptr; void Set_Video_Mode(int mode); void Set_BMP_Palette_Register(int index,RGB_BMP_ptr color); void Check_Bmp(bmp_picture_ptr bmp_ptr); void BMP_Init(bmp_picture_ptr image); void BMP_Show_buffer2(bmp_picture_ptr image); void BMP_Load_Screen(char *bmp); void main() { Set_Video_Mode(VGA256); BMP_Load_Screen("256.bmp"); getch(); Set_Video_Mode(TEXT_MODE); } void Set_Video_Mode(int mode) { union REGS inregs,outregs; inregs.h.ah=0; inregs.h.al=(unsigned char)mode; int86(0x10,&inregs,&outregs); } void Set_BMP_Palette_Register(int index,RGB_BMP_ptr color) { outp(PALETTE_MASK,0xff); outp(PALETTE_REGISTER_WR,index); outp(PALETTE_DATA,color->red); outp(PALETTE_DATA,color->green); outp(PALETTE_DATA,color->blue); } void Check_Bmp(bmp_picture_ptr bmp_ptr) { if(bmp_ptr->file.bfType!=0x4d42) { printf("Not a BMP file!\n") ; exit(1); } if(bmp_ptr->info.biCompression!=0) { printf("Can not display a compressed bmp file!\n"); exit(1); } if(bmp_ptr->info.biBitcount!=8) { printf("Not a index 16color bmp file!\n"); exit(1); } } void BMP_Init(bmp_picture_ptr image) { unsigned int a=(unsigned int)(SCREEN_WIDTH*SCREEN_HEIGHT+1); if((image->buffer=(char far *)malloc(a))==NULL) { printf("\ncouldn't allocate screen buffer"); exit(1); } } void BMP_Show_Buffer2(bmp_picture_ptr image) { _fmemcpy((char far *)video_buffer,(char far *)image->buffer,(unsigned int)SCREEN_WIDTH*SCREEN_HEIGHT/2); } void BMP_Load_Screen(char *bmp) { int i,fp; unsigned int bytes; bmp_picture bmp256; char *file_name; if ((fp=open(bmp,O_RDONLY))==1) return; read(fp,&bmp256.file,sizeof(bitmapfile)); read(fp,&bmp256.info,sizeof(bitmapinfo)); Check_Bmp((bmp_picture_ptr)&bmp256); for(i=0;i<256;i++) { read(fp,&bmp256.palette[i].blue,1); read(fp,&bmp256.palette[i].green,1); read(fp,&bmp256.palette[i].red,1); read(fp,&bmp256.palette[i].reserved,1); bmp256.palette[i].blue=bmp256.palette[i].blue>>2; bmp256.palette[i].green=bmp256.palette[i].green>>2; bmp256.palette[i].red=bmp256.palette[i].red>>2; } for(i=0;i<256;i++) { Set_BMP_Palette_Register(i,(RGB_BMP_ptr)&bmp256.palette[i]); } for(i=SCREEN_HEIGHT-1;i>=0;i--) { lseek(fp,1078+(long)(SCREEN_HEIGHT-i-1)*SCREEN_WIDTH,0); _dos_read(fp,&video_buffer[i*SCREEN_WIDTH],SCREEN_WIDTH,&bytes); } close(fp); }