Dos graphics?

This is a discussion on Dos graphics? within the C++ Programming forums, part of the General Programming Boards category; Is there any way at all to do DOS graphics with C++? I've searched for days on this and I ...

  1. #1
    Resident nerd elnerdo's Avatar
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    Dos graphics?

    Is there any way at all to do DOS graphics with C++? I've searched for days on this and I don't think it's possible. Simply a function to set a pixel to a certain color is all I need.
    nerds unite!

    I'm using windows XP.
    I'm using dev-C++ by bloodshed.

  2. #2
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    there's a graphics library in some header file. but it's not standard and most compilers don't include it.
    i seem to have GCC 3.3.4
    But how do i start it?
    I dont have a menu for it or anything.

  3. #3
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    hey i use those all the time...
    email me at
    bobgb4@gmail.com
    or aim at
    nsannagable

    ... and i will give you a short tutorial

  4. #4
    Kiss the monkey. CodeMonkey's Avatar
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    Allegro? Is that DOS?
    "If you tell the truth, you don't have to remember anything"
    -Mark Twain

  5. #5
    Sweet
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    It used to be. Now it is for alot of platforms and of course still dos.
    He is probably talking about 13h mode.
    Woop?

  6. #6
    and the hat of wrongness Salem's Avatar
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    Well unless the OP gets around to posting the actual compiler and operating system in use, then there isn't much more that can be said.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  7. #7
    Resident nerd elnerdo's Avatar
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    Dev c++ by bloodshed and the operating system in use?

    Shouldn't "DOS graphics" make that obvious enough?
    nerds unite!

    I'm using windows XP.
    I'm using dev-C++ by bloodshed.

  8. #8
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    Nope. FreeDOS != MS-DOS != Windows 9X DOS != Windows NT DOS Emulation != ...

  9. #9
    Resident nerd elnerdo's Avatar
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    Windows XP command prompt.
    nerds unite!

    I'm using windows XP.
    I'm using dev-C++ by bloodshed.

  10. #10
    Super Moderator VirtualAce's Avatar
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    Shouldn't "DOS graphics" make that obvious enough?
    No. It doesn't. DOS graphics can be done on virtually any 16-bit compiler. I recommend 32-bit DJGPP however. You can use Allegro for DOS if you want, but if you don't understand anything about programming games it won't be of much use to you.

    Here is a small DOS mode 13h unit.

    Code:
    #include <dos.h>
    
    typedef unsigned char BYTE;
    typedef unsigned int WORD;
    tyepdef unsigned long DWORD;
    
    #define TRUE 1
    #define FALSE 0
    
    #define XYTOMEM(x,y)  (((y)<<(8))+((y)<<(6))+(x))
    
    
    class Display
    {
      protected:
        int m_iBufferMode;
        BYTE far *m_pScreen;
        BYTE far *m_pBuffer;
        BYTE far *m_pSurface;
      public:
        Display(void):m_iBufferMode(FALSE),m_pScreen(0),m_pBuffer(0),m_pSurface(0) {}
        virtual ~Display(void) 
        {
           if (m_pBuffer) delete [] m_pBuffer;
           m_pBuffer=0;
           m_pScreen=0;
           m_pSurface=0;
        }
    
        void SetBufferMode(int bufmode=TRUE)
        {
           switch(bufmode)
           {
              case TRUE:  m_pSurface=m_pBuffer;m_iBufferMode=TRUE;break;
              default: m_pSurface=m_pScreen;m_iBufferMode=FALSE;break;
           }
             
        }
    
         int Init(void)
         {
            REGS regs;
            regs.x.ax=0x13;
            int86(0x10,& regs, & regs,);
            
            m_pBuffer=new BYTE[64000L];
            if (!m_pBuffer) return (-1);
    
            m_pScreen=(BYTE far *)MK_FP(0xA000,0);
            m_pSurface=m_pScreen;
    
            m_iBufferMode=FALSE;
            return TRUE;
         }
    
         void SetPixel(WORD offset,BYTE color)
         {
            m_pSurface[offset]=color;
         }
      
         void SetPixel(int x,int y,BYTE color)
         {
           m_pSurface[XYTOMEM(x,y)]=color;
         }
    
         BYTE GetPixel(WORD offset)
         {
            return m_pSurface[offset];
         }
    
         BYTE GetPixel(int x,int y)
         {
           return m_pSurface[XYTOMEM(x,y)];
         }
    
         //Always flips from buffer to screen no matter buffermode
         void Flip(void)
         {
            BYTE far *ptrBuf=m_pBuffer;
            BYTE far *ptrScrn=m_pScreen;
    
            asm {
              push  ds
              
              les di,[ptrScrn]
              lds si,[ptrBuf]
              mov ecx,32000d
              rep movsd
            
              pop ds
           }
        }
    };
    If I didn't make any errors this should work just fine. Add functions to the class as you see fit.
    Last edited by VirtualAce; 04-22-2005 at 08:57 PM.

  11. #11
    and the hat of wrongness Salem's Avatar
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    > Dev c++ by bloodshed
    > Windows XP
    Then start using LIBSDL (just look at the packages menu in dev-c++ and download a pre-configured package).
    Then goto http://www.libsdl.org/index.php and start reading examples, tutorials etc.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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