Create a BitMap

Hello...

Somebody can help me in the creation of a BitMap, using only the functions listed on this URL:

http://msdn.microsoft.com/library/de...tmaps_87eb.asp

The attached picture, is the prototype to the BitMap that I try implement... Each frame represent a pixel... The colors must be correspondents...

I enjoy any help...

LoadBitmap and BitBlt will be your two best friends. That is of course if you are loading the bitmap from a .bmp file. If you want to make one on the fly then you're probably going to want to use CreateBitmap and still BitBlt.

I can't load a BitMap of a file, for own motives...

How make this BitMap using CreateBitmap() e BitBlt()?

I studed the two functions but I continue with doubt...

So click on some links, read some example code and try and have a go at something. There's probably an example to do most of what you want if you look hard enough.

You're not going to get much by saying "I want a foo, and use these functions".

Or maybe go back to some simpler tutorials so you're more familiar with the basics of writing code.

I'm studying by the book "Programming Windows, Charles Petzold", and by MSDN, too found some in the "WinProg Tutorial"...

I'm with difficulty almost a week, want only a clue...

So long...

Quote:

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I'm with difficulty almost a week, want only a clue...

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Sorry to break the bad news to you but most of us here have been with difficulty on all our projects for far more than a week. Programming is all about solving problems and they never ever go away on new projects. They just get more complex and harder to solve.

All you need to know is in the Platform SDK under Win32.

I'll give two hints, but it may not be a good way of doing it. First, look up "BITMAPINFOHEADER" in the SDK's documentation and learn the file format of BMPs. Figure these out and you can write all the BMP files you want. I do something similar for fixing up video frames (brightening and cropping), reading a BMP, fixing it, then writing the changed output.

I make in this way...

Code:

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LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  static BYTE Map[ ] = {0xF7, 0xF7, 0xE3, 0xF7, 0xC1, 0xF7, 0x80, 0xF7};
 
  switch (message)
  {
      case WM_PAINT:
      {
        HBITMAP Bmp = CreateBitmap(9,5,1,1,&Map);
       
        HDC hdc = CreateCompatibleDC(GetDC(0));
        PAINTSTRUCT ps;
       
        SelectObject(hdc,Bmp);
       
        if(BeginPaint(hwnd,&ps))
        {
            BitBlt(ps.hdc,25,25,9,5,hdc,0,0,SRCCOPY);
            EndPaint(hwnd,&ps);
        }
      }break;
         
      case WM_DESTROY:
        PostQuitMessage (0);
        break;
     
      default:
        return DefWindowProc (hwnd, message, wParam, lParam);
  }

  return 0;
}

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But yet be in black and white...

you can use CreateCompatibleBitmap with a DC, and then create another DC, use SelectObject with the dc and the bitmap and then you can draw on the bitmap.

I make...

Code:

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LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  COLORREF In = RGB(0,0,255);
  COLORREF Out = RGB(255,0,0);
 
  COLORREF Map[45] = {Out, Out, Out, Out, Out, Out, Out, Out, Out,
                      In, Out, Out,Out, Out, Out, Out, Out, In,
                      In, In, Out, Out, Out, Out, Out, In, In,
                      In, In, In, Out, Out, Out, In, In, In,
                      In, In, In, In, Out, In, In, In, In,
                      };

 
  switch (message)
  {
      case WM_PAINT:
      {
        HDC hdc1, hdc2;
        HBITMAP hBmp;
        BITMAPINFO bi;
        PAINTSTRUCT ps;
       
        hdc1 = CreateCompatibleDC(hdc2 = GetDC(0));
       
        ZeroMemory(&bi.bmiHeader,sizeof(bi.bmiHeader));
       
        bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
        bi.bmiHeader.biWidth = 9;
        bi.bmiHeader.biHeight = 5;
        bi.bmiHeader.biPlanes = 1;
        bi.bmiHeader.biBitCount = 32;
        bi.bmiHeader.biCompression = BI_RGB;
        bi.bmiHeader.biSizeImage = bi.bmiHeader.biWidth * bi.bmiHeader.biHeight * (bi.bmiHeader.biBitCount/8);
        bi.bmiHeader.biXPelsPerMeter = bi.bmiHeader.biYPelsPerMeter = 0;
       
        hBmp = CreateDIBitmap(hdc2, &bi.bmiHeader, CBM_INIT, Map, &bi, DIB_RGB_COLORS);
       
        SelectObject(hdc1, hBmp);
       
        if(BeginPaint(hwnd,&ps))
        {
            BitBlt(ps.hdc,25,25,9,5,hdc1,0,0,SRCCOPY);
            EndPaint(hwnd,&ps);
        }
       
        DeleteDC(hdc1);

      }break;
         
      case WM_DESTROY:
        PostQuitMessage (0);
        break;
     
      default:
        return DefWindowProc (hwnd, message, wParam, lParam);
  }

  return 0;
}

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So was that your working answer, or do you still have some questions?