/*

    File:       main.c

    Description:Main Program for the CGGamma sample.

                CGGamma demonstrates how to use the CGDirectDisplay API to manipulate the system

                gamma tables.

    Author:     DH

    Copyright:  © Copyright 2001 Apple Computer, Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

                ("Apple") in consideration of your agreement to the following terms, and your

                use, installation, modification or redistribution of this Apple software

                constitutes acceptance of these terms.  If you do not agree with these terms,

                please do not use, install, modify or redistribute this Apple software.

                In consideration of your agreement to abide by the following terms, and subject

                to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

                copyrights in this original Apple software (the "Apple Software"), to use,

                reproduce, modify and redistribute the Apple Software, with or without

                modifications, in source and/or binary forms; provided that if you redistribute

                the Apple Software in its entirety and without modifications, you must retain

                this notice and the following text and disclaimers in all such redistributions of

                the Apple Software.  Neither the name, trademarks, service marks or logos of

                Apple Computer, Inc. may be used to endorse or promote products derived from the

                Apple Software without specific prior written permission from Apple.  Except as

                expressly stated in this notice, no other rights or licenses, express or implied,

                are granted by Apple herein, including but not limited to any patent rights that

                may be infringed by your derivative works or by other works in which the Apple

                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                COMBINATION WITH YOUR PRODUCTS.

                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

                CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

                GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

                ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

                OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

                (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

                ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Change History (most recent first):

        6/22/2001       DH      First release of WWDC 2001 sample code

*/

#include <Carbon/Carbon.h>

#include <ApplicationServices/ApplicationServices.h>

#include "main.h"

void Initialize(void);  /* function prototypes */

void EventLoop(void);

void MakeWindow(void);

void MakeMenu(void);

void DoEvent(EventRecord *event);

void DoMenuCommand(long menuResult);

void DoAboutBox(void);

void DrawWindow(WindowRef window);

static OSErr QuitAppleEventHandler(const AppleEvent *appleEvt, AppleEvent* reply, UInt32 refcon);

void InstallTimer( void );

void MyTimerProc ( EventLoopTimerRef inTimer, void *inUserData );

Boolean     gQuitFlag;  /* global */

CGGammaValue gOriginalRedTable[ 256 ];

CGGammaValue gOriginalGreenTable[ 256 ];

CGGammaValue gOriginalBlueTable[ 256 ];

short x[3], y[3];

int main(int argc, char *argv[])

{

    CGTableCount sampleCount;

    CGDisplayErr cgErr;

    Initialize();

    MakeWindow();

    MakeMenu();

    //  Grab original gamma settings

    cgErr = CGGetDisplayTransferByTable( 0, 256, gOriginalRedTable, gOriginalGreenTable, gOriginalBlueTable, &sampleCount);

    InstallTimer();

    EventLoop();

    //  Restore original gamma settings

    cgErr = CGSetDisplayTransferByTable( 0, 256, gOriginalRedTable, gOriginalGreenTable, gOriginalBlueTable);

    return 0;

}

void Initialize()   /* Initialize some managers */

{

    OSErr   err;

    InitCursor();

    err = AEInstallEventHandler( kCoreEventClass, kAEQuitApplication, NewAEEventHandlerUPP((AEEventHandlerProcPtr)QuitAppleEventHandler), 0, false );

    if (err != noErr)

        ExitToShell();

}

static OSErr QuitAppleEventHandler( const AppleEvent *appleEvt, AppleEvent* reply, UInt32 refcon )

{

    gQuitFlag =  true;

    return noErr;

}

void EventLoop()

{

    Boolean gotEvent;

    EventRecord event;

    gQuitFlag = false;

    do

    {

        gotEvent = WaitNextEvent(everyEvent,&event,32767,nil);

        if (gotEvent)

            DoEvent(&event);

    } while (!gQuitFlag);

    ExitToShell();                  

}

void MakeWindow()   /* Put up a window */

{

    Rect    wRect;

    WindowRef   myWindow;

    SetRect(&wRect,50,50,600,200); /* left, top, right, bottom */

    myWindow = NewCWindow(nil, &wRect, "\pHello", true, zoomNoGrow, (WindowRef) -1, true, 0);

    if (myWindow != nil)

        SetPort(GetWindowPort(myWindow));  /* set port to new window */

    else

    ExitToShell();                  

}

void MakeMenu()     /* Put up a menu */

{

    Handle  menuBar;

    MenuRef menu;

    long    response;

    OSErr   err;

    menuBar = GetNewMBar(rMenuBar); /* read menus into menu bar */

    if ( menuBar != nil )

    {

        SetMenuBar(menuBar);    /* install menus */

        // AppendResMenu(GetMenuHandle(mApple), 'DRVR');

        err = Gestalt(gestaltMenuMgrAttr, &response);

    if ((err == noErr) && (response & gestaltMenuMgrAquaLayoutMask))

        {

            menu = GetMenuHandle( mFile );

            DeleteMenuItem( menu, iQuit );

            DeleteMenuItem( menu, iQuitSeparator );

        }

        DrawMenuBar();

    }

    else

        ExitToShell();

}

void DoEvent(EventRecord *event)

{

    short   part;

    Boolean hit;

    char    key;

    Rect    tempRect;

    WindowRef   whichWindow;

    switch (event->what) 

    {

        case mouseDown:

            part = FindWindow(event->where, &whichWindow);

            switch (part)

            {

                case inMenuBar:  /* process a moused menu command */

                    DoMenuCommand(MenuSelect(event->where));

                    break;

                case inSysWindow:

                    break;

                case inContent:

                    if (whichWindow != FrontWindow()) 

                        SelectWindow(whichWindow);

                    break;

                case inDrag:    /* pass screenBits.bounds */

                    GetRegionBounds(GetGrayRgn(), &tempRect);

                    DragWindow(whichWindow, event->where, &tempRect);

                    break;

                case inGrow:

                    break;

                case inGoAway:

                    DisposeWindow(whichWindow);

                    ExitToShell();

                    break;

                case inZoomIn:

                case inZoomOut:

                    hit = TrackBox(whichWindow, event->where, part);

                    if (hit) 

                    {

                        SetPort(GetWindowPort(whichWindow));   // window must be current port

                        EraseRect(GetWindowPortBounds(whichWindow, &tempRect));   // inval/erase because of ZoomWindow bug

                        ZoomWindow(whichWindow, part, true);

                        InvalWindowRect(whichWindow, GetWindowPortBounds(whichWindow, &tempRect));  

                    }

                    break;

                }

                break;

                case keyDown:

        case autoKey:

                    key = event->message & charCodeMask;

                    if (event->modifiers & cmdKey)

                        if (event->what == keyDown)

                            DoMenuCommand(MenuKey(key));

        case activateEvt:          /* if you needed to do something special */

                    break;

                case updateEvt:

            DrawWindow((WindowRef) event->message);

            break;

                case kHighLevelEvent:

            AEProcessAppleEvent( event );

            break;

                case diskEvt:

            break;

    }

}

void DoMenuCommand(long menuResult)

{

    short   menuID;     /* the resource ID of the selected menu */

    short   menuItem;   /* the item number of the selected menu */

    menuID = HiWord(menuResult);    /* use macros to get item & menu number */

    menuItem = LoWord(menuResult);

    switch (menuID) 

    {

        case mApple:

            switch (menuItem) 

            {

                case iAbout:

                    DoAboutBox();

                    break;

                case iQuit:

                    ExitToShell();

                    break;

                default:

                    break;

            }

            break;

        case mFile:

            break;

        case mEdit:

            break;

    }

    HiliteMenu(0);  /* unhighlight what MenuSelect (or MenuKey) hilited */

}

void DrawWindow(WindowRef window)

{

    Rect        tempRect;

    GrafPtr     curPort;

    GetPort(&curPort);

    SetPort(GetWindowPort(window));

    BeginUpdate(window);

    EraseRect(GetWindowPortBounds(window, &tempRect));

    DrawControls(window);

    DrawGrowIcon(window);

    EndUpdate(window);

    SetPort(curPort);

}

void DoAboutBox(void)

{

   (void) Alert(kAboutBox, nil);  // simple alert dialog box

}

void MyTimerProc ( EventLoopTimerRef inTimer, void *inUserData )

{

    CGGammaValue redTable[ 256 ];

    CGGammaValue greenTable[ 256 ];

    CGGammaValue blueTable[ 256 ];

    CGTableCount sampleCount;

    CGDisplayErr cgErr;

    short i, j;

    static int firstTime = 1;

    if ( firstTime == 1 )

    {

        for (j = 0; j < 3; j++)

        {

            x [j] = (TickCount () + j * 120) % 256;

            y [j] = 255;

        }

        firstTime = 0;

    }

    for (i = 0; i < 256 ; i++)

    {

        redTable[ i ] = gOriginalRedTable[ i ] * (y[ 0 ] % 256) / 256;

        greenTable[ i ] = gOriginalGreenTable[ i ] * (y[ 1 ] % 256) / 256;

        blueTable[ i ] = gOriginalBlueTable[ i ] * (y[ 2 ] % 256) / 256;

    }

    cgErr = CGSetDisplayTransferByTable( 0, 256, redTable, greenTable, blueTable);

    for (j = 0; j < 3; j++)

    {

        (x [j] > y [j]) ? y [j]++ : y [j]--;

        if (x [j] == y [j])

            x [j] = ((TickCount () % (1457 * j)) + j * 97) % 256;

    }

}

void InstallTimer( void )

{

    EventLoopTimerRef timer;

    InstallEventLoopTimer(

        GetCurrentEventLoop(),

        0,

        kEventDurationMillisecond * 8,      //  Roughly 125 times per second

        NewEventLoopTimerUPP( MyTimerProc ),

        NULL,

        &timer );

}