/*
	File:		DrawCMYK.c
	
	Description: This example demonstrates QuickTimes support for rendering using the CMYK colorspace.
                 Test Image: Sample 10-AlisaCMYK.jpg
                 Note: Nothing will draw if the image does not contain a kImageDescriptionColorSpace
                       extention.

	Author:		QuickTime engineering

	Copyright: 	© Copyright 1999 - 2005 Apple Computer, Inc. All rights reserved.
	
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	Change History (most recent first): <2> 4/22/02 released as dts sample code
										<1> 4/1/99 initial release

*/

#include "MacShell.h"

void DrawCMYK( void )
{
	OSErr err = noErr;
	Handle hOpenTypeList = NewHandle(0);
	long   numTypes = 0;
	FSSpec theFSSpec;
	GraphicsImportComponent importer = 0;
	Rect naturalBounds, windowBounds;
	ImageDescriptionHandle desc = NULL, offscreenDesc = NULL;
	Handle h = NULL;
	OSType pixelFormat;
	GWorldPtr gworld = NULL;
	PixMapHandle pixmap;
	MatrixRecord matrix;
	ImageSequence imageSequence = 0;

	BuildGraphicsImporterValidFileTypes( hOpenTypeList, &numTypes );
	HLock( hOpenTypeList );

	err = GetOneFileWithPreview(numTypes, (OSTypePtr)*hOpenTypeList, &theFSSpec, NULL);
	DisposeHandle( hOpenTypeList );
	if ( err ) return;
    
    // locate and open a graphics importer component
	err = GetGraphicsImporterForFile( &theFSSpec, &importer );
    if ( err ) return;

	// find out the real colorspace.
	err = GraphicsImportGetImageDescription( importer, &desc );
    if ( err ) return;
    
	err = GetImageDescriptionExtension( desc, &h, kImageDescriptionColorSpace, 1 );
	if( !h || !*h ) return;
	pixelFormat = *(OSType*)*h;
	pixelFormat = EndianU32_BtoN(pixelFormat);
    printf( "Pixel Format: %c%c%c%c\n", (char)(pixelFormat>>24), (char)(pixelFormat>>16), 
							(char)(pixelFormat>>8), (char)pixelFormat);

	
	// Draw the image into an offscreen gworld of that colorspace.
	err = GraphicsImportGetNaturalBounds( importer, &naturalBounds );
	err = QTNewGWorld( &gworld, pixelFormat, &naturalBounds, NULL, NULL, 0 );
    if ( noErr == err ) {
    
		pixmap = GetGWorldPixMap( gworld );
		LockPixels( pixmap );
		err = GraphicsImportSetGWorld( importer, gworld, nil );
		err = GraphicsImportDraw( importer );
		
		windowBounds = naturalBounds;
		OffsetRect( &windowBounds, 10, 45 );
		window = NewCWindow( NULL, &windowBounds, "\pDraw CMYK", true, documentProc, 
				(WindowPtr)-1, true, 0);
		
		// Copy the image from the offscreen to the window using an image decompression sequence.
		err = MakeImageDescriptionForPixMap( pixmap, &offscreenDesc );

		SetIdentityMatrix( &matrix );
		
		err = DecompressSequenceBegin( &imageSequence, offscreenDesc, GetWindowPort(window), NULL, NULL, 
				&matrix, ditherCopy, NULL, 0, codecNormalQuality, nil );

		err = DecompressSequenceFrameS( imageSequence, GetPixBaseAddr( pixmap ),
				(**offscreenDesc).dataSize, 0, NULL, NULL );
		
		CDSequenceEnd( imageSequence );
		DisposeHandle( (Handle)offscreenDesc );
	}
	
	DisposeHandle( (Handle)desc );
	DisposeHandle( h );
	if ( gworld ) DisposeGWorld( gworld );
	CloseComponent( importer );
}
