graphics in win32 API

This is a discussion on graphics in win32 API within the Windows Programming forums, part of the Platform Specific Boards category; ive been reading about CreateBitmap and all that, but how do i use it? id just like to be able ...

  1. #1
    mustang benny bennyandthejets's Avatar
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    graphics in win32 API

    ive been reading about CreateBitmap and all that, but how do i use it? id just like to be able to do graphical operations in a window under windows 98. is this the way to do it, and if so, how does it work?
    benforbes@optusnet.com.au
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  2. #2
    Normal vector Carlos's Avatar
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    Hi!

    id just like to be able to do graphical operations in a window under windows 98.
    What kind of graphical operations would you like to do?
    There are many possibilities, starting with the simple Windows graphical functions up to DirectX.
    I'd advice you to clarify your needs, and if you're planning just to draw some rectangles, manipulate fonts, load some BMP's, then take a closer look at "graphic functions in Windows API" in MSDN.
    Else, if you want much more, then use DirectX or OpenGL.
    You'll find articles and sources at e.g.http://www.codeproject.com/, buy some good books then, if you get stucked, just post your questions here

    Have a nice code!

  3. #3
    Refugee face_master's Avatar
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    Code:
    SearchOnMsdn("GDI"); // But for some reason msdn is really screwed ATM
    Please direct all complaints regarding this post to the nearest brick wall Have a nice day.

  4. #4
    Banned master5001's Avatar
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    This is from my win api docs (old docs, mind you)

    The CreateBitmap function creates a bitmap with the specified width, height, and color format (color planes and bits per pixel).

    HBITMAP CreateBitmap(

    int nWidth, // bitmap width, in pixels
    int nHeight, // bitmap height, in pixels
    UINT cPlanes, // number of color planes used by device
    UINT cBitsPerPel, // number of bits required to identify a color
    CONST VOID *lpvBits // pointer to array containing color data
    );
    Parameters

    nWidth

    Specifies the bitmap width, in pixels.

    nHeight

    Specifies the bitmap height, in pixels.

    cPlanes

    Specifies the number of color planes used by the device.

    cBitsPerPel

    Specifies the number of bits required to identify the color of a single pixel.

    lpvBits

    Points to an array of color data used to set the colors in a rectangle of pixels. Each scan line in the rectangle must be word aligned (scan lines that are not word aligned must be padded with zeros). If this parameter is NULL, the new bitmap is undefined.

    Return Values

    If the function succeeds, the return value is a handle to a bitmap.
    If the function fails, the return value is NULL.

    Remarks

    After a bitmap is created, it can be selected into a device context by calling the SelectObject function.
    While the CreateBitmap function can be used to create color bitmaps, for performance reasons applications should use CreateBitmap to create monochrome bitmaps and CreateCompatibleBitmap to create color bitmaps. When a color bitmap returned from CreateBitmap is selected into a device context, Windows must ensure that the bitmap matches the format of the device context it is being selected into. Since CreateCompatibleBitmap takes a device context, it returns a bitmap that has the same format as the specified device context. Because of this, subsequent calls to SelectObject are faster than with a color bitmap returned from CreateBitmap.

    If the bitmap is monochrome, zeros represent the foreground color and ones represent the background color for the destination device context.
    If an application sets the nWidth or nHeight parameters to zero, CreateBitmap returns the handle of a 1- by 1-pixel, monochrome bitmap.
    When you no longer need the bitmap, call the DeleteObject function to delete it.

  5. #5
    Banned master5001's Avatar
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    Oh yeah, if you know that much. You create your bitmap and copy it to a device context (HDC) and copy that HDC to the window's HDC during a WM_PAINT.

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