/*
	File:		ImageCompressionUtilities.h
	
	Description: Include file for ImageCompressionUtilities.c

	Author:		QuickTime team

	Copyright: 	© Copyright 1999 Apple Computer, Inc. All rights reserved.
	
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	Change History (most recent first):

	   <1>	 	08/30/00	srk		Carbonization

*/

#ifndef _IMAGECOMPRESSIONUTILITIES_
#define _IMAGECOMPRESSIONUTILITIES_

#ifndef __MOVIES__
#include <Movies.h>
#endif


// _____________________ Image Compression Utilities _____________________ //


// Given a QuickDraw picture, extract QuickTime compressed image data and description, if any
OSErr ExtractCompressData( PicHandle thePict, Handle *dataOut, ImageDescriptionHandle *idh );


// Utilities for compressing from various types of sources


OSErr RecompressCompressedImageWithTransparency( ImageDescriptionHandle originalDesc, Handle originalImageData,
													RGBColor *keyColor, 
													RgnHandle limitHitTestRegion,
													ImageDescriptionHandle *idh, Handle * imageData );
OSErr RecompressPictureWithTransparency ( PicHandle originalPicture,
													RGBColor *keyColor, 
													RgnHandle limitHitTestRegion,
													ImageDescriptionHandle *idh, Handle * imageData );
OSErr RecompressPictureFileWithTransparency ( FSSpec * spec, 
													RGBColor *keyColor, 
													RgnHandle limitHitTestRegion,
													ImageDescriptionHandle *idh, Handle * imageData );

// Low-level callback procedure based routine to compress with/without transparency & hit-testing

enum {
	kRecoProcInitMsg = 1,					// message and refcon are valid
	kRecoProcDisposeMsg = 2,				// message and refcon are valid
	kRecoProcGetBoundsMsg = 3,				// message, bounds and refcon are valid. Proc fills in bounds with rectangle to use for compressed image.
	kRecoProcDrawMsg = 4					// message, bounds, drawingPort, portType and refcon are valid. portType is 'imag' if drawing into
											// image GWorld, 'imap' if drawing into hit testing GWorld.
};

enum {
	kRecoProcOriginalImageType = 			FOUR_CHAR_CODE('imag'),
	kRecoProcHitTestingImageType = 			FOUR_CHAR_CODE('imap')
};

typedef pascal OSErr (*CompressDrawProc)( short message, Rect * bounds, GWorldPtr drawingPort, OSType drawingImageType, void * refcon );

OSErr RecompressWithTransparencyFromProc( CompressDrawProc drawProc, void * drawProcRefcon, 
													Boolean includeHitTesting,
													RGBColor *keyColor, 
													RgnHandle hitTestRegion,
													ImageDescriptionHandle *idh, Handle * imageData );

#endif
