— procedure: open-dib (filename string)

Return type: dib. Calls the OpenDIB entry of DIBUTILS.DLL. If the return value is not #f then the file filename was found, successfully opened, and the contents were suitable for loading into memory as a device independent bitmap.

— procedure: write-dib (filename string) (dib dib)

Return type: bool. Calls the WriteDIB entry of DIBUTILS.DLL. Returns #t if the file filename could be opened and written to. After this operation the file contains the bitmap data in a standard format that is understood by open-dib and various system utilities like the bitmap editor. Any problems resulting in failure are signalled by a #f return value.

— procedure: bitmap-from-dib (dib dib) (palette hpalette)

Return type: hbitmap. Calls the BitmapFromDib entry of DIBUTILS.DLL. The returned value is a device dependent bitmap. The colours from the DIB are matched against colors in palette.

— procedure: dib-from-bitmap (bitmap hbitmap) (style dword) (bits word) (palette hpalette)

Return type: dib. Returns a DIB containing the same image as the device dependent bitmap bitmap. Style determines the kind of DIB, e.g. compression style. Calls the DibFromBitmap entry of DIBUTILS.DLL.

— procedure: dib-blt (dest hdc) (x int) (y int) (w int) (h int) (src dib) (src-x int) (src-y int) (raster-op long)

Return type: bool. Calls the DibBlt entry of DIBUTILS.DLL. Similar to the Win32 API BitBlt call, but draws a DIB rather than a piece of another device context. Draws the dib on device context hdc at position (x,y). A rectangle of width w and height h is copied from position (src-x,src-y) of dib. Raster-op is supposed to allow the source and destination to be combined but I don't think I got this right so stick to SRCCOPY.

— procedure: delete-dib (dib dib)

Return type: bool. This procedure reclaims the storage occupied by a DIB. After being deleted, the DIB should not be used. This procedure allows the programmer to reclaim external heap storage rather than risking it running out before the next garbage collection.

— procedure: dib-height (dib dib)

Return type: int. Calls the DibHeight expand entry of DIBUTILS.DLL, which returns the height of the bitmap in pixels.

— procedure: dib-width (dib dib)

Return type: int. Calls the DibWidth entry of DIBUTILS.DLL, which returns the width of the bitmap in pixels.

— procedure: copy-bitmap (bm hbitmap)

Return type: hbitmap. Calls the CopyBitmap of DIBUTILS.DLL, which creates a new bitmap with the same size and contents as the original.

— procedure: create-dib (width int) (height int) (style int) (depth int) (palette hpalette)

Return type: dib. Calls the CreateDIB entry of DIBUTILS.DLL. Creates a DIB of width by height pixels and depth bits of colour information. The style parameter determines how the bitmap is stored. I have only ever used BI_RGB. If depth<=8quote>

Return type: dib. Calls the CreateDIB entry of DIBUTILS.DLL. Creates a DIB of width by height pixels and depth bits of colour information. The style parameter determines how the bitmap is stored. I have only ever used BI_RGB. If depth<=8quote>

Return type: dib. Calls the CreateDIB entry of DIBUTILS.DLL. Creates a DIB of width by height pixels and depth bits of colour information. The style parameter determines how the bitmap is stored. I have only ever used BI_RGB. If depth<=8quote>

Return type: dib. Calls the CreateDIB entry of DIBUTILS.DLL. Creates a DIB of width by height pixels and depth bits of colour information. The style parameter determines how the bitmap is stored. I have only ever used BI_RGB. If depth<=8quote>

Return type: dib. Calls the CreateDIB entry of DIBUTILS.DLL