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144 lines
5.5 KiB
144 lines
5.5 KiB
// Copyright (c) Microsoft Corp. 1995
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/*==============================================================================
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Interfaces to encode AWD image streams.
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19-Jul-95 RajeevD Created
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==============================================================================*/
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#ifndef _AWDENC_
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#define _AWDENC_
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#include <windows.h>
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#include <buffers.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*==============================================================================
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IMAGE INTERFACE OVERVIEW
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This interface is used to create an image file suitable for embedding in an AWD
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file. First, an IMAGEINFO structure is be initialized and passed to ImageCreate.
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Next, ImageSetBand can be called multiple times to append bitmap data to the
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current page or start a new page. Finally, ImageClose must be called at the end
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of the last page.
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==============================================================================*/
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/*==============================================================================
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The IMAGEINFO structure must be initialized before passing it to ImageCreate.
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The dwTypeIn field may be set to HRAW_DATA if passing Windows bitmaps, where
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the high (sign) bit of each byte is leftmost in the image, or LRAW_DATA for fax
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bitmaps, where it is rightmost. The dwTypeOut field must be set to RAMBO_DATA.
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These constants are defined in buffers.h.
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==============================================================================*/
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typedef struct
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{
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DWORD dwTypeIn; // HRAW_DATA or LRAW_DATA
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DWORD dwTypeOut; // must be RAMBO_DATA
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WORD xRes; // horizontal resolution [dpi]
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WORD yRes; // vertical resolution [dpi]
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}
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IMAGEINFO, FAR *LPIMAGEINFO;
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/*==============================================================================
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ImageCreate creates an image file with the specified name, returning a context
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pointer to be passed to ImageSetBand and ImageClose.
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==============================================================================*/
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LPVOID // returns context (NULL on failure)
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WINAPI
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ImageCreate
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(
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LPTSTR lpszImagePath, // image file name
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LPIMAGEINFO lpImageInfo // image parameters
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);
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/*==============================================================================
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ImageSetBand will encode a BITMAP with the following restrictions:
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bmType must be 0
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bmWidth pixel width, must be same for all bands and a multiple of 32
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bmHeight pixel height, must be same for all bands except last on page
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bmWidthBytes must be bmWidth / 8
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bmPlanes must be 1
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bmBitsPixel must be 1
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bmBits must point to less than 64K of data
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All bitmaps must have the same height, except the last one on a page, which may
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be less. To start a new page, ImageSetBand is called with bmHeight set to 0.
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A new page should not be started before the first page or after the last page.
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==============================================================================*/
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BOOL // returns TRUE on success
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WINAPI
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ImageSetBand
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(
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LPVOID lpImage, // context returned from ImageCreate
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LPBITMAP lpbmBand // bitmap data to be added
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);
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/*==============================================================================
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ImageClose is called at the end of the last page. If ImageClose fails, the
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incomplete image file must be deleted. If ImageSetBand fails, ImageClose must
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be called before deleting the image file.
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==============================================================================*/
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BOOL // returns TRUE on success
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WINAPI
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ImageClose
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(
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LPVOID lpImage // context returned from ImageCreate
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);
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/*==============================================================================
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AWD INTERFACE OVERVIEW
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This interface is used to create an AWD file and embed image files within it.
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The current implementation relies on static variables; therefore Win32 clients
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should not use it from more than one thread and Win16 clients should not yield
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(PeekMessage etc.) between AWDCreate and AWDClose.
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==============================================================================*/
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/*==============================================================================
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AWDCreate creates a file with the specified name, returning a context pointer to
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be passed to AWDAddImage and AWDClose.
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==============================================================================*/
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LPVOID // returns context (NULL on failure)
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WINAPI
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AWDCreate
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(
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LPTSTR lpszAWDPath, // AWD file name
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LPVOID lpReserved // must be NULL
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);
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/*==============================================================================
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AWDAddImage may be called multiple times to embed images within the AWD file.
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It is the responsibility of the client to delete the image file if no longer
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needed.
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==============================================================================*/
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BOOL // returns TRUE on success
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WINAPI
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AWDAddImage
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(
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LPVOID lpAWD, // context returned from AWDCreate
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LPTSTR lpszImagePath // image file to embed in AWD file
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);
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/*==============================================================================
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AWDClose is called after no more image are to be added to the AWD file. If
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AWDClose fails, the incomplete AWD file should be deleted. If AWDAddImage fails,
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AWDClose must be called before deleting the incomplete AWD file.
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==============================================================================*/
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BOOL
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WINAPI
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AWDClose
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(
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LPVOID lpAWD
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);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // _AWDENC_
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