/*

    File:       FastDither.c

    Contains:   This short snippet shows how you can use QuickTime

                to get faster dithering.

    Written by: John Wang   

    Copyright:  Copyright © 1994-1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

                7/29/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#ifdef THINK_C

#define     applec

#endif

#include    <Types.h>

#include    <Memory.h>

#include    <QuickDraw.h>

#include    <Palettes.h>

#include    <QDOffscreen.h>

#include    <Errors.h>

#include    <Fonts.h>

#include    <Dialogs.h>

#include    <Windows.h>

#include    <Menus.h>

#include    <Events.h>

#include    <Desk.h>

#include    <DiskInit.h>

#include    <OSUtils.h>

#include    <Resources.h>

#include    <ToolUtils.h>

#include    <AppleEvents.h>

#include    <EPPC.h>

#include    <GestaltEqu.h>

#include    <Processes.h>

#include    <Balloons.h>

#include    <Aliases.h>

#include    <MixedMode.h>

#include    <Scrap.h>

#include    <LowMem.h>

#include    <ImageCompression.h>

WindowPtr   gWindow;

void    main(void);

void    doTest(void);

/* ------------------------------------------------------------------------- */

void main(void)

{

    Rect bounds = {40, 40, 40, 40};

    MaxApplZone();

    InitGraf(&qd.thePort);

    InitFonts();

    FlushEvents(0xffff,0);

    InitWindows();

    InitMenus();

    InitDialogs(0);

    TEInit();

    InitCursor();

    gWindow = NewCWindow(0L, &bounds, "\p", true, documentProc,

                            (WindowPtr)-1L, false, 0L);

    SetGWorld((CGrafPtr) gWindow, GetMainDevice());

    doTest();

}

void doTest(void)

{

    short                   i;

    GWorldPtr               srcGWorld;

    PixMapHandle            srcPixMap;

    PicHandle               pict;

    Rect                    pictBounds;

    CGrafPtr                savedPort;

    GDHandle                savedDevice;

    ImageDescriptionHandle  desc;

    Ptr                     imageData;

    long                    size;

    OSErr                   err;

    //  Load the picture and define the source and dest rects.

    pict = GetPicture(128);

    pictBounds = (**pict).picFrame;

    OffsetRect(&pictBounds, -pictBounds.left, -pictBounds.top);

    SizeWindow(gWindow, pictBounds.right, pictBounds.bottom, true);

    //  Create a temporary offscreen used to store the pict.

    if ( NewGWorld(&srcGWorld, 32, &pictBounds, nil, nil, 0) != noErr )

        ExitToShell();

    srcPixMap = GetGWorldPixMap(srcGWorld); 

    LockPixels(srcPixMap);

    //  Draw the picture into the temporary gworld. 

    GetGWorld(&savedPort, &savedDevice);

    SetGWorld(srcGWorld, nil);

    DrawPicture(pict, &pictBounds);

    SetGWorld(savedPort, savedDevice);

    //  Now, compress the picture into a data buffer.

    if ( GetMaxCompressionSize(srcPixMap, &(**srcPixMap).bounds, 32,

                        codecNormalQuality, kRawCodecType, bestSpeedCodec, &size) )

        ExitToShell();

    imageData = NewPtr(size);

    desc = (ImageDescriptionHandle) NewHandle(sizeof(ImageDescription));

    if ( err=CompressImage(srcPixMap, &(**srcPixMap).bounds, codecNormalQuality,

                    kRawCodecType, desc, imageData))

        ExitToShell();

    //  Decompress the image to the window. 

    SetWTitle(gWindow, "\pQuickTime ditherCopy");

    for ( i=0; i<5; i++ ) {

        EraseRect(&gWindow->portRect);

        DecompressImage(imageData, desc, ((CGrafPtr)gWindow)->portPixMap, 

                    &pictBounds, &gWindow->portRect, ditherCopy | 0x80, nil);

    }

    while ( !Button() );

    SetWTitle(gWindow, "\pQuickTime srcCopy");

    for (i=0; i<5; i++) {

        EraseRect(&gWindow->portRect);

        DecompressImage(imageData, desc, ((CGrafPtr)gWindow)->portPixMap, 

                    &pictBounds, &gWindow->portRect, srcCopy, nil);

    }

    while ( !Button() );

    SetWTitle(gWindow, "\pQuickDraw ditherCopy");

    for ( i=0; i<5; i++ ) {

        EraseRect(&gWindow->portRect);

        CopyBits((BitMap *)*srcPixMap, &gWindow->portBits, &pictBounds,

                    &gWindow->portRect, ditherCopy, nil);

    }

    while ( !Button() );

    SetWTitle(gWindow, "\pQuickDraw srcCopy");

    for ( i=0; i<5; i++ ) {

        EraseRect(&gWindow->portRect);

        CopyBits((BitMap *)*srcPixMap, &gWindow->portBits, &pictBounds,

                    &gWindow->portRect, srcCopy, nil);

    }

    while ( !Button() );

    DisposeGWorld( srcGWorld ); 

}