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The BMP2TXT conveter (From the network)



 1
 // bmp_converter_2.cpp : Defines the entry point for the application.
 2 //
 3 
 4 #include "stdafx.h"
 5 // Primitive BMP to ASCII art generator
 6 // Reads source.bmp and outputs art.txt
 7 // Source must be 24-bit .bmp
 8 
 9 #include <iostream.h>
10 #include <windows.h>
11 
12 #define MAX_SHADES 10
13 
14 BITMAPFILEHEADER bfh;
15 BITMAPINFOHEADER bih;
16 RGBTRIPLE *image;
17 DWORD written;
18 HANDLE hfile;
19 int imagesize;
20 char shades[MAX_SHADES] = {'#','$','O','=','+','|','-','^','.',' '};
21 char return1 = 0x0D;
22 char return2 = 0x0A;
23 int needle = 0;
24 int average_color = 0;
25 
26 int APIENTRY WinMain(HINSTANCE hInstance,
27                      HINSTANCE hPrevInstance,
28                      LPSTR     lpCmdLine,
29                      int       nCmdShow)
30 {
31      // Open a channel to source file
32      hfile = CreateFile("source.bmp",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,NULL,NULL);
33      // Read header
34      ReadFile(hfile,&bfh,sizeof(bfh),&written,NULL);
35      ReadFile(hfile,&bih,sizeof(bih),&written,NULL);
36      // Read image
37      imagesize = bih.biSizeImage;
38      image = new RGBTRIPLE[imagesize];
39      ReadFile(hfile,image,imagesize*sizeof(RGBTRIPLE),&written,NULL);
40      // Close source file
41      CloseHandle(hfile);
42      // Open channel to output
43      hfile = CreateFile("art.txt",GENERIC_WRITE,NULL,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
44      // Keeping in mind the image is upside down, convert and write it
45      // It down-samples the image a bit in res too
46      for(int y = bih.biHeight-1;y >= 0;y--)
47      {
48           for(int x = 0;x < bih.biWidth;x++)
49           {
50                // Get the average color
51                 average_color = (image[x+y*bih.biWidth].rgbtBlue+image[x+y*bih.biWidth].rgbtRed+image[x+y*bih.biWidth].rgbtGreen)/3;
52                // Convert to a shade of 8
53                average_color /= (256/MAX_SHADES);
54                if(average_color >= MAX_SHADES)
55                     average_color -= 1;
56                // Output
57                WriteFile(hfile,&shades[average_color],1,&written,NULL);
58                //WriteFile(hfile,&shades[average_color],1,&written,NULL);
59           }
60           WriteFile(hfile,&return1,1,&written,NULL);
61           WriteFile(hfile,&return2,1,&written,NULL);
62      }
63      // Close handle to output
64      CloseHandle(hfile);
65      return 0;
66 }
67 
68 

This code is just a rough implementation to convert a small .bmp file to text file.
It needs to be improved to be fit with bigger file or monofile. 

Compile and debug tool: VC++ 6, Win32 Simple Application.

Below is the testing result. The output txt file is often italic if the width is not dividable by 8 well.

Source.bmp (Must be placed in the project directory)

Output txt displayed as(only a small part of the whole pic):
                                    
                            #        
                    =#########=      
                ###############-     
               -###############=     
        =#####  ###############-     
   =##########= -######-             
   ###########=    -###=             
   =#########=     =###- =#=         
    -#######       #########-        
      -####=    -###########=        
       -###-    =#######=####        
       -###-    #####=  -####        
       -###-   -####  -=-####-       
       -###=   -########-####-       
       -###=   -#######--####-       
       -###=   -###-    -####-       
       -###=   =###--###=####=       
       -###=   =#############=       
       -###=   =####### -####=       
       =###-   =###=    =####-       
       =###-   -###= -#######-       
      -####-    #############-       
     -#####     =############-       
    ######=     -####  ######        
    #####-      ####   #####=        
    =##-       ####    -#####=       
              =###      -#####=      
             -###        -#####-     
             -#-          =####-     
                           =##=      
                            ##-
      
                                     


posted on 2007-10-14 22:50 everspring79 阅读(381) 评论(0)  编辑 收藏 引用 所属分类: Snippet


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