Desperados : Wanted Dead or Alive - PICC Resource

Inside .res file there is 'PICC' entry resources.

PICC specification

 +0x00 : Unknow  
 +0x04 : Nb PICC entry  
 +0x08 : Entry Data (view class CResEntry)  

CResEntry

An entry can be represented by this structure :

 00000000 CResEntry    struc ; (sizeof=0xC)  
 00000000 Width      dw ?  
 00000002 Height     dw ?  
 00000004 IsCompressed  dd ?  
 00000008 SizeFile    dd ?  
 0000000C CResEntry    ends  

If the field IsCompressed is set to 1, data are compressed using zlib version 1.1.3.

Pseudo-Code to read PICC

 magic_number = read(4)  
 unknow = read(4)  
 if (magic_number == 0x43434950):  
   unknow = read(4)  
   nb_PICC_entry = read(4)  
   for i in xrange(0, nb_PICC_entry):  
     width = read(4)  
     height = read(4)  
     is_compressed = read(4)  
     size = read(4)  
     data = read(size)  
     if is_compressed == 1:  
       data = zlib.decompress(data)  

Then the data are simply image in 16 bits format, you can convert it into 24 bits, with the following pseudo-code :

 void setRGB(png_byte *ptr, unsigned char r,   
                unsigned char g, unsigned char b)  
 {  
     ptr[0] = r;  
     ptr[1] = g;  
     ptr[2] = b;  
 }  
 ...  
 int x, y;  
 for (y = 0 ; y < height ; y++)  
 {  
     for (x = 0 ; x < width ; x++)  
     {  
         int a;  
         unsigned short *tab;  
         unsigned short color;  
         a = = (x + (y * width)) * 2;  
         tab = (unsigned short*)(buffer + a);  
         color = *tab;  
         setRGB(&(row[x * 3]),   
                     (color >> 11 << 8) / 32,   
                     (((color >> 5) & 0x3F) << 8) / 64,   
                     ((color & 0x1F) << 8) / 32);  
     }  
     png_write_row(png_ptr, row);  
 }