src/video/quartz/SDL_QuartzVideo.m
author Sam Lantinga <slouken@libsdl.org>
Sun, 28 May 2006 13:04:16 +0000
branchSDL-1.3
changeset 1662 782fd950bd46
parent 1659 14717b52abc0
permissions -rw-r--r--
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2003  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_QuartzVideo.h"
#include "SDL_QuartzWindow.h"

/* 
    Add methods to get at private members of NSScreen. 
    Since there is a bug in Apple's screen switching code
    that does not update this variable when switching
    to fullscreen, we'll set it manually (but only for the
    main screen).
*/
@ interface NSScreen (NSScreenAccess) - (void) setFrame:(NSRect) frame;
@end @ implementation NSScreen (NSScreenAccess) - (void) setFrame:(NSRect)
    frame;
{
    _frame = frame;
}

@end
/* 
    Structure for rez switch gamma fades
    We can hide the monitor flicker by setting the gamma tables to 0
*/
#define QZ_GAMMA_TABLE_SIZE 256
    typedef struct
{

    CGGammaValue red[QZ_GAMMA_TABLE_SIZE];
    CGGammaValue green[QZ_GAMMA_TABLE_SIZE];
    CGGammaValue blue[QZ_GAMMA_TABLE_SIZE];

} SDL_QuartzGammaTable;


/* Bootstrap functions */
static int QZ_Available ();
static SDL_VideoDevice *QZ_CreateDevice (int device_index);
static void QZ_DeleteDevice (SDL_VideoDevice * device);

/* Initialization, Query, Setup, and Redrawing functions */
static int QZ_VideoInit (_THIS, SDL_PixelFormat * video_format);

static SDL_Rect **QZ_ListModes (_THIS, SDL_PixelFormat * format,
                                Uint32 flags);
static void QZ_UnsetVideoMode (_THIS, BOOL to_desktop);

static SDL_Surface *QZ_SetVideoMode (_THIS, SDL_Surface * current,
                                     int width, int height, int bpp,
                                     Uint32 flags);
static int QZ_ToggleFullScreen (_THIS, int on);
static int QZ_SetColors (_THIS, int first_color,
                         int num_colors, SDL_Color * colors);

static int QZ_LockDoubleBuffer (_THIS, SDL_Surface * surface);
static void QZ_UnlockDoubleBuffer (_THIS, SDL_Surface * surface);
static int QZ_ThreadFlip (_THIS);
static int QZ_FlipDoubleBuffer (_THIS, SDL_Surface * surface);
static void QZ_DoubleBufferUpdate (_THIS, int num_rects, SDL_Rect * rects);

static void QZ_DirectUpdate (_THIS, int num_rects, SDL_Rect * rects);
static int QZ_LockWindow (_THIS, SDL_Surface * surface);
static void QZ_UnlockWindow (_THIS, SDL_Surface * surface);
static void QZ_UpdateRects (_THIS, int num_rects, SDL_Rect * rects);
static void QZ_VideoQuit (_THIS);

/* Hardware surface functions (for fullscreen mode only) */
#if 0                           /* Not used (apparently, it's really slow) */
static int QZ_FillHWRect (_THIS, SDL_Surface * dst, SDL_Rect * rect,
                          Uint32 color);
#endif
static int QZ_LockHWSurface (_THIS, SDL_Surface * surface);
static void QZ_UnlockHWSurface (_THIS, SDL_Surface * surface);
static int QZ_AllocHWSurface (_THIS, SDL_Surface * surface);
static void QZ_FreeHWSurface (_THIS, SDL_Surface * surface);
/* static int  QZ_FlipHWSurface (_THIS, SDL_Surface *surface); */

/* Bootstrap binding, enables entry point into the driver */
VideoBootStrap QZ_bootstrap = {
    "Quartz", "Mac OS X CoreGraphics", QZ_Available, QZ_CreateDevice
};


/* Bootstrap functions */
static int
QZ_Available ()
{
    return 1;
}

static SDL_VideoDevice *
QZ_CreateDevice (int device_index)
{

#pragma unused (device_index)

    SDL_VideoDevice *device;
    SDL_PrivateVideoData *hidden;

    device = (SDL_VideoDevice *) SDL_malloc (sizeof (*device));
    hidden = (SDL_PrivateVideoData *) SDL_malloc (sizeof (*hidden));

    if (device == NULL || hidden == NULL)
        SDL_OutOfMemory ();

    SDL_memset (device, 0, sizeof (*device));
    SDL_memset (hidden, 0, sizeof (*hidden));

    device->hidden = hidden;

    device->VideoInit = QZ_VideoInit;
    device->ListModes = QZ_ListModes;
    device->SetVideoMode = QZ_SetVideoMode;
    device->ToggleFullScreen = QZ_ToggleFullScreen;
    device->UpdateMouse = QZ_UpdateMouse;
    device->SetColors = QZ_SetColors;
    /* device->UpdateRects      = QZ_UpdateRects; this is determined by SetVideoMode() */
    device->VideoQuit = QZ_VideoQuit;

    device->LockHWSurface = QZ_LockHWSurface;
    device->UnlockHWSurface = QZ_UnlockHWSurface;
    device->AllocHWSurface = QZ_AllocHWSurface;
    device->FreeHWSurface = QZ_FreeHWSurface;
    /* device->FlipHWSurface   = QZ_FlipHWSurface */ ;

    device->SetGamma = QZ_SetGamma;
    device->GetGamma = QZ_GetGamma;
    device->SetGammaRamp = QZ_SetGammaRamp;
    device->GetGammaRamp = QZ_GetGammaRamp;

    device->GL_GetProcAddress = QZ_GL_GetProcAddress;
    device->GL_GetAttribute = QZ_GL_GetAttribute;
    device->GL_MakeCurrent = QZ_GL_MakeCurrent;
    device->GL_SwapBuffers = QZ_GL_SwapBuffers;
    device->GL_LoadLibrary = QZ_GL_LoadLibrary;

    device->FreeWMCursor = QZ_FreeWMCursor;
    device->CreateWMCursor = QZ_CreateWMCursor;
    device->ShowWMCursor = QZ_ShowWMCursor;
    device->WarpWMCursor = QZ_WarpWMCursor;
    device->MoveWMCursor = QZ_MoveWMCursor;
    device->CheckMouseMode = QZ_CheckMouseMode;
    device->InitOSKeymap = QZ_InitOSKeymap;
    device->PumpEvents = QZ_PumpEvents;

    device->SetCaption = QZ_SetCaption;
    device->SetIcon = QZ_SetIcon;
    device->IconifyWindow = QZ_IconifyWindow;
    /*device->GetWMInfo     = QZ_GetWMInfo; */
    device->GrabInput = QZ_GrabInput;

    device->CreateYUVOverlay = QZ_CreateYUVOverlay;

    device->free = QZ_DeleteDevice;

    return device;
}

static void
QZ_DeleteDevice (SDL_VideoDevice * device)
{

    SDL_free (device->hidden);
    SDL_free (device);
}

static int
QZ_VideoInit (_THIS, SDL_PixelFormat * video_format)
{

    /* Initialize the video settings; this data persists between mode switches */
    display_id = kCGDirectMainDisplay;
    save_mode = CGDisplayCurrentMode (display_id);
    mode_list = CGDisplayAvailableModes (display_id);
    palette = CGPaletteCreateDefaultColorPalette ();

    /* Gather some information that is useful to know about the display */
    CFNumberGetValue (CFDictionaryGetValue
                      (save_mode, kCGDisplayBitsPerPixel),
                      kCFNumberSInt32Type, &device_bpp);

    CFNumberGetValue (CFDictionaryGetValue (save_mode, kCGDisplayWidth),
                      kCFNumberSInt32Type, &device_width);

    CFNumberGetValue (CFDictionaryGetValue (save_mode, kCGDisplayHeight),
                      kCFNumberSInt32Type, &device_height);

    /* Determine the current screen size */
    this->info.current_w = device_width;
    this->info.current_h = device_height;

    /* Determine the default screen depth */
    video_format->BitsPerPixel = device_bpp;

    /* Set misc globals */
    current_grab_mode = SDL_GRAB_OFF;
    cursor_should_be_visible = YES;
    cursor_visible = YES;
    current_mods = 0;

    if (Gestalt (gestaltSystemVersion, &system_version) != noErr)
        system_version = 0;

    /* register for sleep notifications so wake from sleep generates SDL_VIDEOEXPOSE */
    QZ_RegisterForSleepNotifications (this);

    /* Fill in some window manager capabilities */
    this->info.wm_available = 1;

    return 0;
}

static SDL_Rect **
QZ_ListModes (_THIS, SDL_PixelFormat * format, Uint32 flags)
{

    CFIndex num_modes;
    CFIndex i;

    int list_size = 0;

    /* Any windowed mode is acceptable */
    if ((flags & SDL_FULLSCREEN) == 0)
        return (SDL_Rect **) - 1;

    /* Free memory from previous call, if any */
    if (client_mode_list != NULL) {

        int i;

        for (i = 0; client_mode_list[i] != NULL; i++)
            SDL_free (client_mode_list[i]);

        SDL_free (client_mode_list);
        client_mode_list = NULL;
    }

    num_modes = CFArrayGetCount (mode_list);

    /* Build list of modes with the requested bpp */
    for (i = 0; i < num_modes; i++) {

        CFDictionaryRef onemode;
        CFNumberRef number;
        int bpp;

        onemode = CFArrayGetValueAtIndex (mode_list, i);
        number = CFDictionaryGetValue (onemode, kCGDisplayBitsPerPixel);
        CFNumberGetValue (number, kCFNumberSInt32Type, &bpp);

        if (bpp == format->BitsPerPixel) {

            int intvalue;
            int hasMode;
            int width, height;

            number = CFDictionaryGetValue (onemode, kCGDisplayWidth);
            CFNumberGetValue (number, kCFNumberSInt32Type, &intvalue);
            width = (Uint16) intvalue;

            number = CFDictionaryGetValue (onemode, kCGDisplayHeight);
            CFNumberGetValue (number, kCFNumberSInt32Type, &intvalue);
            height = (Uint16) intvalue;

            /* Check if mode is already in the list */
            {
                int i;
                hasMode = SDL_FALSE;
                for (i = 0; i < list_size; i++) {
                    if (client_mode_list[i]->w == width &&
                        client_mode_list[i]->h == height) {
                        hasMode = SDL_TRUE;
                        break;
                    }
                }
            }

            /* Grow the list and add mode to the list */
            if (!hasMode) {

                SDL_Rect *rect;

                list_size++;

                if (client_mode_list == NULL)
                    client_mode_list = (SDL_Rect **)
                        SDL_malloc (sizeof (*client_mode_list) *
                                    (list_size + 1));
                else
                    client_mode_list = (SDL_Rect **)
                        SDL_realloc (client_mode_list,
                                     sizeof (*client_mode_list) *
                                     (list_size + 1));

                rect = (SDL_Rect *)
                    SDL_malloc (sizeof (**client_mode_list));

                if (client_mode_list == NULL || rect == NULL) {
                    SDL_OutOfMemory ();
                    return NULL;
                }

                rect->x = rect->y = 0;
                rect->w = width;
                rect->h = height;

                client_mode_list[list_size - 1] = rect;
                client_mode_list[list_size] = NULL;
            }
        }
    }

    /* Sort list largest to smallest (by area) */
    {
        int i, j;
        for (i = 0; i < list_size; i++) {
            for (j = 0; j < list_size - 1; j++) {

                int area1, area2;
                area1 = client_mode_list[j]->w * client_mode_list[j]->h;
                area2 =
                    client_mode_list[j + 1]->w * client_mode_list[j + 1]->h;

                if (area1 < area2) {
                    SDL_Rect *tmp = client_mode_list[j];
                    client_mode_list[j] = client_mode_list[j + 1];
                    client_mode_list[j + 1] = tmp;
                }
            }
        }
    }
    return client_mode_list;
}

static SDL_bool
QZ_WindowPosition (_THIS, int *x, int *y)
{
    const char *window = getenv ("SDL_VIDEO_WINDOW_POS");
    if (window) {
        if (sscanf (window, "%d,%d", x, y) == 2) {
            return SDL_TRUE;
        }
    }
    return SDL_FALSE;
}

static void
QZ_UnsetVideoMode (_THIS, BOOL to_desktop)
{

    /* Reset values that may change between switches */
    this->info.blit_fill = 0;
    this->FillHWRect = NULL;
    this->UpdateRects = NULL;
    this->LockHWSurface = NULL;
    this->UnlockHWSurface = NULL;

    /* Release fullscreen resources */
    if (mode_flags & SDL_FULLSCREEN) {

        NSRect screen_rect;

        /*  Release double buffer stuff */
        if (mode_flags & SDL_DOUBLEBUF) {
            quit_thread = YES;
            SDL_SemPost (sem1);
            SDL_WaitThread (thread, NULL);
            SDL_DestroySemaphore (sem1);
            SDL_DestroySemaphore (sem2);
            SDL_free (sw_buffers[0]);
        }

        /* 
           Release the OpenGL context
           Do this first to avoid trash on the display before fade
         */
        if (mode_flags & SDL_INTERNALOPENGL) {

            QZ_TearDownOpenGL (this);
            CGLSetFullScreen (NULL);
        }
        if (to_desktop) {
            /* Restore original screen resolution/bpp */
            CGDisplaySwitchToMode (display_id, save_mode);
            CGReleaseAllDisplays ();
            ShowMenuBar ();
            /* 
               Reset the main screen's rectangle
               See comment in QZ_SetVideoFullscreen for why we do this
             */
            screen_rect = NSMakeRect (0, 0, device_width, device_height);
          [[NSScreen mainScreen] setFrame:screen_rect];
        }
    }
    /* Release window mode resources */
    else {

        [qz_window close];
        [qz_window release];
        qz_window = nil;
        window_view = nil;

        /* Release the OpenGL context */
        if (mode_flags & SDL_INTERNALOPENGL)
            QZ_TearDownOpenGL (this);
    }

    /* Signal successful teardown */
    video_set = SDL_FALSE;
}

static SDL_Surface *
QZ_SetVideoFullScreen (_THIS, SDL_Surface * current, int width,
                       int height, int bpp, Uint32 flags)
{
    boolean_t exact_match = 0;
    NSRect screen_rect;
    CGError error;
    CGDisplayFadeReservationToken fade_token =
        kCGDisplayFadeReservationInvalidToken;

    /* Fade to black to hide resolution-switching flicker (and garbage
       that is displayed by a destroyed OpenGL context, if applicable) */
    if (CGAcquireDisplayFadeReservation (5, &fade_token) == kCGErrorSuccess) {
        CGDisplayFade (fade_token, 0.3, kCGDisplayBlendNormal,
                       kCGDisplayBlendSolidColor, 0.0, 0.0, 0.0, TRUE);
    }

    /* Destroy any previous mode */
    if (video_set == SDL_TRUE)
        QZ_UnsetVideoMode (this, FALSE);

    /* See if requested mode exists */
    mode = CGDisplayBestModeForParameters (display_id, bpp, width,
                                           height, &exact_match);

    /* Require an exact match to the requested mode */
    if (!exact_match) {
        SDL_SetError ("Failed to find display resolution: %dx%dx%d", width,
                      height, bpp);
        goto ERR_NO_MATCH;
    }

    /* Put up the blanking window (a window above all other windows) */
    if (getenv ("SDL_SINGLEDISPLAY"))
        error = CGDisplayCapture (display_id);
    else
        error = CGCaptureAllDisplays ();

    if (CGDisplayNoErr != error) {
        SDL_SetError ("Failed capturing display");
        goto ERR_NO_CAPTURE;
    }

    /* Do the physical switch */
    if (CGDisplayNoErr != CGDisplaySwitchToMode (display_id, mode)) {
        SDL_SetError ("Failed switching display resolution");
        goto ERR_NO_SWITCH;
    }

    current->pixels = (Uint32 *) CGDisplayBaseAddress (display_id);
    current->pitch = CGDisplayBytesPerRow (display_id);

    current->flags = 0;
    current->w = width;
    current->h = height;
    current->flags |= SDL_FULLSCREEN;
    current->flags |= SDL_HWSURFACE;
    current->flags |= SDL_PREALLOC;

    this->UpdateRects = QZ_DirectUpdate;
    this->LockHWSurface = QZ_LockHWSurface;
    this->UnlockHWSurface = QZ_UnlockHWSurface;

    /* Setup double-buffer emulation */
    if (flags & SDL_DOUBLEBUF) {

        /*
           Setup a software backing store for reasonable results when
           double buffering is requested (since a single-buffered hardware
           surface looks hideous).

           The actual screen blit occurs in a separate thread to allow 
           other blitting while waiting on the VBL (and hence results in higher framerates).
         */
        this->LockHWSurface = NULL;
        this->UnlockHWSurface = NULL;
        this->UpdateRects = NULL;

        current->flags |= (SDL_HWSURFACE | SDL_DOUBLEBUF);
        this->UpdateRects = QZ_DoubleBufferUpdate;
        this->LockHWSurface = QZ_LockDoubleBuffer;
        this->UnlockHWSurface = QZ_UnlockDoubleBuffer;
        this->FlipHWSurface = QZ_FlipDoubleBuffer;

        current->pixels = SDL_malloc (current->pitch * current->h * 2);
        if (current->pixels == NULL) {
            SDL_OutOfMemory ();
            goto ERR_DOUBLEBUF;
        }

        sw_buffers[0] = current->pixels;
        sw_buffers[1] =
            (Uint8 *) current->pixels + current->pitch * current->h;

        quit_thread = NO;
        sem1 = SDL_CreateSemaphore (0);
        sem2 = SDL_CreateSemaphore (1);
        thread = SDL_CreateThread ((int (*)(void *)) QZ_ThreadFlip, this);
    }

    if (CGDisplayCanSetPalette (display_id))
        current->flags |= SDL_HWPALETTE;

    /* Setup OpenGL for a fullscreen context */
    if (flags & SDL_INTERNALOPENGL) {

        CGLError err;
        CGLContextObj ctx;

        if (!QZ_SetupOpenGL (this, bpp, flags)) {
            goto ERR_NO_GL;
        }

        ctx =[gl_context cglContext];
        err = CGLSetFullScreen (ctx);

        if (err) {
            SDL_SetError ("Error setting OpenGL fullscreen: %s",
                          CGLErrorString (err));
            goto ERR_NO_GL;
        }

        [gl_context makeCurrentContext];

        glClear (GL_COLOR_BUFFER_BIT);

        [gl_context flushBuffer];

        current->flags |= SDL_INTERNALOPENGL;
    }

    /* If we don't hide menu bar, it will get events and interrupt the program */
    HideMenuBar ();

    /* Fade in again (asynchronously) */
    if (fade_token != kCGDisplayFadeReservationInvalidToken) {
        CGDisplayFade (fade_token, 0.5, kCGDisplayBlendSolidColor,
                       kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
        CGReleaseDisplayFadeReservation (fade_token);
    }

    /* 
       There is a bug in Cocoa where NSScreen doesn't synchronize
       with CGDirectDisplay, so the main screen's frame is wrong.
       As a result, coordinate translation produces incorrect results.
       We can hack around this bug by setting the screen rect
       ourselves. This hack should be removed if/when the bug is fixed.
     */
    screen_rect = NSMakeRect (0, 0, width, height);
  [[NSScreen mainScreen] setFrame:screen_rect];

    /* Save the flags to ensure correct tear-down */
    mode_flags = current->flags;

    /* Set app state, hide cursor if necessary, ... */
    QZ_DoActivate (this);

    return current;

    /* Since the blanking window covers *all* windows (even force quit) correct recovery is crucial */
  ERR_NO_GL:
  ERR_DOUBLEBUF:CGDisplaySwitchToMode (display_id, save_mode);
  ERR_NO_SWITCH:CGReleaseAllDisplays ();
  ERR_NO_CAPTURE:
  ERR_NO_MATCH:if (fade_token != kCGDisplayFadeReservationInvalidToken) {
        CGDisplayFade (fade_token, 0.5, kCGDisplayBlendSolidColor,
                       kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
        CGReleaseDisplayFadeReservation (fade_token);
    }
    return NULL;
}

static SDL_Surface *
QZ_SetVideoWindowed (_THIS, SDL_Surface * current, int width,
                     int height, int *bpp, Uint32 flags)
{
    unsigned int style;
    NSRect contentRect;
    BOOL isCustom = NO;
    int center_window = 1;
    int origin_x, origin_y;
    CGDisplayFadeReservationToken fade_token =
        kCGDisplayFadeReservationInvalidToken;

    current->flags = 0;
    current->w = width;
    current->h = height;

    contentRect = NSMakeRect (0, 0, width, height);

    /*
       Check if we should completely destroy the previous mode 
       - If it is fullscreen
       - If it has different noframe or resizable attribute
       - If it is OpenGL (since gl attributes could be different)
       - If new mode is OpenGL, but previous mode wasn't
     */
    if (video_set == SDL_TRUE) {
        if (mode_flags & SDL_FULLSCREEN) {
            /* Fade to black to hide resolution-switching flicker (and garbage
               that is displayed by a destroyed OpenGL context, if applicable) */
            if (CGAcquireDisplayFadeReservation (5, &fade_token) ==
                kCGErrorSuccess) {
                CGDisplayFade (fade_token, 0.3, kCGDisplayBlendNormal,
                               kCGDisplayBlendSolidColor, 0.0, 0.0, 0.0,
                               TRUE);
            }
            QZ_UnsetVideoMode (this, TRUE);
        } else if (((mode_flags ^ flags) & (SDL_NOFRAME | SDL_RESIZABLE)) ||
                   (mode_flags & SDL_INTERNALOPENGL) ||
                   (flags & SDL_INTERNALOPENGL)) {
            QZ_UnsetVideoMode (this, TRUE);
        }
    }

    /* Check for user-specified window and view */
    {
        char *windowPtrString = getenv ("SDL_NSWindowPointer");
        char *viewPtrString = getenv ("SDL_NSQuickDrawViewPointer");

        if (windowPtrString && viewPtrString) {

            /* Release any previous window */
            if (qz_window) {
                [qz_window release];
                qz_window = nil;
            }

            qz_window = (NSWindow *) atoi (windowPtrString);
            window_view = (NSQuickDrawView *) atoi (viewPtrString);
            isCustom = YES;

            /* 
               Retain reference to window because we
               might release it in QZ_UnsetVideoMode
             */
            [qz_window retain];

            style =[qz_window styleMask];
            /* Check resizability */
            if (style & NSResizableWindowMask)
                current->flags |= SDL_RESIZABLE;

            /* Check frame */
            if (style & NSBorderlessWindowMask)
                current->flags |= SDL_NOFRAME;
        }
    }

    /* Check if we should recreate the window */
    if (qz_window == nil) {

        /* Set the window style based on input flags */
        if (flags & SDL_NOFRAME) {
            style = NSBorderlessWindowMask;
            current->flags |= SDL_NOFRAME;
        } else {
            style = NSTitledWindowMask;
            style |= (NSMiniaturizableWindowMask | NSClosableWindowMask);
            if (flags & SDL_RESIZABLE) {
                style |= NSResizableWindowMask;
                current->flags |= SDL_RESIZABLE;
            }
        }

        if (QZ_WindowPosition (this, &origin_x, &origin_y)) {
            center_window = 0;
            contentRect.origin.x = (float) origin_x;
            contentRect.origin.y = (float) origin_y;
        }

        /* Manually create a window, avoids having a nib file resource */
      qz_window =[[SDL_QuartzWindow alloc] initWithContentRect: contentRect styleMask: style backing: NSBackingStoreBuffered defer:NO];

        if (qz_window == nil) {
            SDL_SetError ("Could not create the Cocoa window");
            if (fade_token != kCGDisplayFadeReservationInvalidToken) {
                CGDisplayFade (fade_token, 0.5,
                               kCGDisplayBlendSolidColor,
                               kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
                CGReleaseDisplayFadeReservation (fade_token);
            }
            return NULL;
        }

        /*[ qz_window setReleasedWhenClosed:YES ]; */
        QZ_SetCaption (this, this->wm_title, this->wm_icon);
      [qz_window setAcceptsMouseMovedEvents:YES];
      [qz_window setViewsNeedDisplay:NO];
        if (center_window) {
            [qz_window center];
        }
      [qz_window setDelegate:
[[[SDL_QuartzWindowDelegate alloc] init] autorelease]];
    }
    /* We already have a window, just change its size */
    else {

        if (!isCustom) {
          [qz_window setContentSize:contentRect.size];
            current->flags |= (SDL_NOFRAME | SDL_RESIZABLE) & mode_flags;
          [window_view setFrameSize:contentRect.size];
        }
    }

    /* For OpenGL, we bind the context to a subview */
    if (flags & SDL_INTERNALOPENGL) {

        if (!QZ_SetupOpenGL (this, *bpp, flags)) {
            if (fade_token != kCGDisplayFadeReservationInvalidToken) {
                CGDisplayFade (fade_token, 0.5,
                               kCGDisplayBlendSolidColor,
                               kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
                CGReleaseDisplayFadeReservation (fade_token);
            }
            return NULL;
        }

      window_view =[[NSView alloc] initWithFrame:contentRect];
      [window_view setAutoresizingMask:NSViewWidthSizable |
         NSViewHeightSizable];
      [[qz_window contentView] addSubview:window_view];
      [gl_context setView:window_view];
        [window_view release];
        [gl_context makeCurrentContext];
      [qz_window makeKeyAndOrderFront:nil];
        current->flags |= SDL_INTERNALOPENGL;
    }
    /* For 2D, we set the subview to an NSQuickDrawView */
    else {
        short qdbpp = 0;

        /* Only recreate the view if it doesn't already exist */
        if (window_view == nil) {

          window_view =[[NSQuickDrawView alloc] initWithFrame:contentRect];
          [window_view setAutoresizingMask:NSViewWidthSizable |
             NSViewHeightSizable];
          [[qz_window contentView] addSubview:window_view];
            [window_view release];
          [qz_window makeKeyAndOrderFront:nil];
        }

        LockPortBits ([window_view qdPort]);
        current->pixels =
            GetPixBaseAddr (GetPortPixMap ([window_view qdPort]));
        current->pitch =
            GetPixRowBytes (GetPortPixMap ([window_view qdPort]));
        qdbpp = GetPixDepth (GetPortPixMap ([window_view qdPort]));
        UnlockPortBits ([window_view qdPort]);

        /* QuickDraw may give a 16-bit shadow surface on 8-bit displays! */
        *bpp = qdbpp;

        current->flags |= SDL_SWSURFACE;
        current->flags |= SDL_PREALLOC;
        current->flags |= SDL_ASYNCBLIT;

        /* 
           current->pixels now points to the window's pixels
           We want it to point to the *view's* pixels 
         */
        {
            int vOffset =[qz_window frame].size.height -
                [window_view frame].size.height -[window_view frame].origin.y;

            int hOffset =[window_view frame].origin.x;

            current->pixels =
                (Uint8 *) current->pixels + (vOffset * current->pitch) +
                hOffset * (qdbpp / 8);
        }
        this->UpdateRects = QZ_UpdateRects;
        this->LockHWSurface = QZ_LockWindow;
        this->UnlockHWSurface = QZ_UnlockWindow;
    }

    /* Save flags to ensure correct teardown */
    mode_flags = current->flags;

    /* Fade in again (asynchronously) if we came from a fullscreen mode and faded to black */
    if (fade_token != kCGDisplayFadeReservationInvalidToken) {
        CGDisplayFade (fade_token, 0.5, kCGDisplayBlendSolidColor,
                       kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
        CGReleaseDisplayFadeReservation (fade_token);
    }

    return current;
}

static SDL_Surface *
QZ_SetVideoMode (_THIS, SDL_Surface * current, int width,
                 int height, int bpp, Uint32 flags)
{

    current->flags = 0;
    current->pixels = NULL;

    /* Setup full screen video */
    if (flags & SDL_FULLSCREEN) {
        current =
            QZ_SetVideoFullScreen (this, current, width, height, bpp, flags);
        if (current == NULL)
            return NULL;
    }
    /* Setup windowed video */
    else {
        /* Force bpp to the device's bpp */
        bpp = device_bpp;
        current =
            QZ_SetVideoWindowed (this, current, width, height, &bpp, flags);
        if (current == NULL)
            return NULL;
    }

    /* Setup the new pixel format */
    {
        int amask = 0, rmask = 0, gmask = 0, bmask = 0;

        switch (bpp) {
        case 16:               /* (1)-5-5-5 RGB */
            amask = 0;
            rmask = 0x7C00;
            gmask = 0x03E0;
            bmask = 0x001F;
            break;
        case 24:
            SDL_SetError ("24bpp is not available");
            return NULL;
        case 32:               /* (8)-8-8-8 ARGB */
            amask = 0x00000000;
            rmask = 0x00FF0000;
            gmask = 0x0000FF00;
            bmask = 0x000000FF;
            break;
        }

        if (!SDL_ReallocFormat (current, bpp, rmask, gmask, bmask, amask)) {
            SDL_SetError ("Couldn't reallocate pixel format");
            return NULL;
        }
    }

    /* Signal successful completion (used internally) */
    video_set = SDL_TRUE;

    return current;
}

static int
QZ_ToggleFullScreen (_THIS, int on)
{
    return 0;
}

static int
QZ_SetColors (_THIS, int first_color, int num_colors, SDL_Color * colors)
{

    CGTableCount index;
    CGDeviceColor color;

    for (index = first_color; index < first_color + num_colors; index++) {

        /* Clamp colors between 0.0 and 1.0 */
        color.red = colors->r / 255.0;
        color.blue = colors->b / 255.0;
        color.green = colors->g / 255.0;

        colors++;

        CGPaletteSetColorAtIndex (palette, color, index);
    }

    if (CGDisplayNoErr != CGDisplaySetPalette (display_id, palette))
        return 0;

    return 1;
}

static int
QZ_LockDoubleBuffer (_THIS, SDL_Surface * surface)
{

    return 1;
}

static void
QZ_UnlockDoubleBuffer (_THIS, SDL_Surface * surface)
{

}

 /* The VBL delay is based on code by Ian R Ollmann's RezLib <iano@cco.caltech.edu> */
static AbsoluteTime
QZ_SecondsToAbsolute (double seconds)
{

    union
    {
        UInt64 i;
        Nanoseconds ns;
    } temp;

    temp.i = seconds * 1000000000.0;

    return NanosecondsToAbsolute (temp.ns);
}

static int
QZ_ThreadFlip (_THIS)
{

    Uint8 *src, *dst;
    int skip, len, h;

    /*
       Give this thread the highest scheduling priority possible,
       in the hopes that it will immediately run after the VBL delay
     */
    {
        pthread_t current_thread;
        int policy;
        struct sched_param param;

        current_thread = pthread_self ();
        pthread_getschedparam (current_thread, &policy, &param);
        policy = SCHED_RR;
        param.sched_priority = sched_get_priority_max (policy);
        pthread_setschedparam (current_thread, policy, &param);
    }

    while (1) {

        SDL_SemWait (sem1);
        if (quit_thread)
            return 0;

        /*
         * We have to add SDL_VideoSurface->offset here, since we might be a
         *  smaller surface in the center of the framebuffer (you asked for
         *  a fullscreen resolution smaller than the hardware could supply
         *  so SDL is centering it in a bigger resolution)...
         */
        dst =
            (Uint8 *) CGDisplayBaseAddress (display_id) +
            SDL_VideoSurface->offset;
        src = current_buffer + SDL_VideoSurface->offset;
        len = SDL_VideoSurface->w * SDL_VideoSurface->format->BytesPerPixel;
        h = SDL_VideoSurface->h;
        skip = SDL_VideoSurface->pitch;

        /* Wait for the VBL to occur (estimated since we don't have a hardware interrupt) */
        {

            /* The VBL delay is based on Ian Ollmann's RezLib <iano@cco.caltech.edu> */
            double refreshRate;
            double linesPerSecond;
            double target;
            double position;
            double adjustment;
            AbsoluteTime nextTime;
            CFNumberRef refreshRateCFNumber;

            refreshRateCFNumber =
                CFDictionaryGetValue (mode, kCGDisplayRefreshRate);
            if (NULL == refreshRateCFNumber) {
                SDL_SetError ("Mode has no refresh rate");
                goto ERROR;
            }

            if (0 ==
                CFNumberGetValue (refreshRateCFNumber, kCFNumberDoubleType,
                                  &refreshRate)) {
                SDL_SetError ("Error getting refresh rate");
                goto ERROR;
            }

            if (0 == refreshRate) {

                SDL_SetError ("Display has no refresh rate, using 60hz");

                /* ok, for LCD's we'll emulate a 60hz refresh, which may or may not look right */
                refreshRate = 60.0;
            }

            linesPerSecond = refreshRate * h;
            target = h;

            /* Figure out the first delay so we start off about right */
            position = CGDisplayBeamPosition (display_id);
            if (position > target)
                position = 0;

            adjustment = (target - position) / linesPerSecond;

            nextTime =
                AddAbsoluteToAbsolute (UpTime (),
                                       QZ_SecondsToAbsolute (adjustment));

            MPDelayUntil (&nextTime);
        }


        /* On error, skip VBL delay */
      ERROR:

        while (h--) {

            SDL_memcpy (dst, src, len);
            src += skip;
            dst += skip;
        }

        /* signal flip completion */
        SDL_SemPost (sem2);
    }

    return 0;
}

static int
QZ_FlipDoubleBuffer (_THIS, SDL_Surface * surface)
{

    /* wait for previous flip to complete */
    SDL_SemWait (sem2);

    current_buffer = surface->pixels;

    if (surface->pixels == sw_buffers[0])
        surface->pixels = sw_buffers[1];
    else
        surface->pixels = sw_buffers[0];

    /* signal worker thread to do the flip */
    SDL_SemPost (sem1);

    return 0;
}


static void
QZ_DoubleBufferUpdate (_THIS, int num_rects, SDL_Rect * rects)
{

    /* perform a flip if someone calls updaterects on a doublebuferred surface */
    this->FlipHWSurface (this, SDL_VideoSurface);
}

static void
QZ_DirectUpdate (_THIS, int num_rects, SDL_Rect * rects)
{
#pragma unused(this,num_rects,rects)
}

/*
    The obscured code is based on work by Matt Slot fprefect@ambrosiasw.com,
    who supplied sample code for Carbon.
*/

/*#define TEST_OBSCURED 1*/

#if TEST_OBSCURED
#include "CGS.h"
#endif

static int
QZ_IsWindowObscured (NSWindow * window)
{


#if TEST_OBSCURED

    /*  
       In order to determine if a direct copy to the screen is possible,
       we must figure out if there are any windows covering ours (including shadows).
       This can be done by querying the window server about the on screen
       windows for their screen rectangle and window level.
       The procedure used below is puts accuracy before speed; however, it aims to call
       the window server the fewest number of times possible to keep things reasonable.
       In my testing on a 300mhz G3, this routine typically takes < 2 ms. -DW

       Notes:
       -Calls into the Window Server involve IPC which is slow.
       -Getting a rectangle seems slower than getting the window level
       -The window list we get back is in sorted order, top to bottom
       -On average, I suspect, most windows above ours are dock icon windows (hence optimization)
       -Some windows above ours are always there, and cannot move or obscure us (menu bar)

       Bugs:
       -no way (yet) to deactivate direct drawing when a window is dragged,
       or suddenly obscured, so drawing continues and can produce garbage
       We need some kind of locking mechanism on window movement to prevent this

       -deactivated normal windows use activated normal
       window shadows (slight inaccuraccy)
     */

    /* Cache the connection to the window server */
    static CGSConnectionID cgsConnection = (CGSConnectionID) - 1;

    /* Cache the dock icon windows */
    static CGSWindowID dockIcons[kMaxWindows];
    static int numCachedDockIcons = 0;

    CGSWindowID windows[kMaxWindows];
    CGSWindowCount i, count;
    CGSWindowLevel winLevel;
    CGSRect winRect;

    CGSRect contentRect;
    int windowNumber;
    int firstDockIcon;
    int dockIconCacheMiss;
    int windowContentOffset;

    int obscured = SDL_TRUE;

    if ([window isVisible]) {

        /*  
           walk the window list looking for windows over top of
           (or casting a shadow on) ours 
         */

        /* 
           Get a connection to the window server
           Should probably be moved out into SetVideoMode() or InitVideo()
         */
        if (cgsConnection == (CGSConnectionID) - 1) {
            cgsConnection = (CGSConnectionID) 0;
            cgsConnection = _CGSDefaultConnection ();
        }

        if (cgsConnection) {

            if (![window styleMask] & NSBorderlessWindowMask)
                windowContentOffset = 22;
            else
                windowContentOffset = 0;

            windowNumber =[window windowNumber];

            /* The window list is sorted according to order on the screen */
            count = 0;
            CGSGetOnScreenWindowList (cgsConnection, 0, kMaxWindows,
                                      windows, &count);
            CGSGetScreenRectForWindow (cgsConnection, windowNumber,
                                       &contentRect);

            /* adjust rect for window title bar (if present) */
            contentRect.origin.y += windowContentOffset;
            contentRect.size.height -= windowContentOffset;

            firstDockIcon = -1;
            dockIconCacheMiss = SDL_FALSE;

            /* 
               The first window is always an empty window with level kCGSWindowLevelTop
               so start at index 1
             */
            for (i = 1; i < count; i++) {

                /* If we reach our window in the list, it cannot be obscured */
                if (windows[i] == windowNumber) {

                    obscured = SDL_FALSE;
                    break;
                } else {

                    float shadowSide;
                    float shadowTop;
                    float shadowBottom;

                    CGSGetWindowLevel (cgsConnection, windows[i], &winLevel);

                    if (winLevel == kCGSWindowLevelDockIcon) {

                        int j;

                        if (firstDockIcon < 0) {

                            firstDockIcon = i;

                            if (numCachedDockIcons > 0) {

                                for (j = 0; j < numCachedDockIcons; j++) {

                                    if (windows[i] == dockIcons[j])
                                        i++;
                                    else
                                        break;
                                }

                                if (j != 0) {

                                    i--;

                                    if (j < numCachedDockIcons) {

                                        dockIconCacheMiss = SDL_TRUE;
                                    }
                                }

                            }
                        }

                        continue;
                    } else if (winLevel == kCGSWindowLevelMenuIgnore
                               /* winLevel == kCGSWindowLevelTop */ ) {

                        continue;       /* cannot obscure window */
                    } else if (winLevel == kCGSWindowLevelDockMenu ||
                               winLevel == kCGSWindowLevelMenu) {

                        shadowSide = 18;
                        shadowTop = 4;
                        shadowBottom = 22;
                    } else if (winLevel == kCGSWindowLevelUtility) {

                        shadowSide = 8;
                        shadowTop = 4;
                        shadowBottom = 12;
                    } else if (winLevel == kCGSWindowLevelNormal) {

                        /* 
                           These numbers are for foreground windows,
                           they are too big (but will work) for background windows 
                         */
                        shadowSide = 20;
                        shadowTop = 10;
                        shadowBottom = 24;
                    } else if (winLevel == kCGSWindowLevelDock) {

                        /* Create dock icon cache */
                        if (numCachedDockIcons != (i - firstDockIcon)
                            || dockIconCacheMiss) {

                            numCachedDockIcons = i - firstDockIcon;
                            SDL_memcpy (dockIcons,
                                        &(windows[firstDockIcon]),
                                        numCachedDockIcons *
                                        sizeof (*windows));
                        }

                        /* no shadow */
                        shadowSide = 0;
                        shadowTop = 0;
                        shadowBottom = 0;
                    } else {

                        /*
                           kCGSWindowLevelDockLabel,
                           kCGSWindowLevelDock,
                           kOther???
                         */

                        /* no shadow */
                        shadowSide = 0;
                        shadowTop = 0;
                        shadowBottom = 0;
                    }

                    CGSGetScreenRectForWindow (cgsConnection,
                                               windows[i], &winRect);

                    winRect.origin.x -= shadowSide;
                    winRect.origin.y -= shadowTop;
                    winRect.size.width += shadowSide;
                    winRect.size.height += shadowBottom;

                    if (NSIntersectsRect (contentRect, winRect)) {

                        obscured = SDL_TRUE;
                        break;
                    }

                }               /* window was not our window */

            }                   /* iterate over windows */

        }
        /* get cgsConnection */
    }
    /* window is visible */
    return obscured;
#else
    return SDL_TRUE;
#endif
}


/* Locking functions for the software window buffer */
static int
QZ_LockWindow (_THIS, SDL_Surface * surface)
{

    return LockPortBits ([window_view qdPort]);
}

static void
QZ_UnlockWindow (_THIS, SDL_Surface * surface)
{

    UnlockPortBits ([window_view qdPort]);
}

/* Resize icon, BMP format */
static const unsigned char QZ_ResizeIcon[] = {
    0x42, 0x4d, 0x31, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x00,
    0x00, 0x00, 0x28, 0x00,
    0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x01, 0x00,
    0x18, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xfb, 0x01, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x13, 0x0b,
    0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xda, 0xda, 0xda, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff,
    0xff, 0xda, 0xda, 0xda,
    0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff, 0xff, 0xda, 0xda, 0xda,
    0x87, 0x87, 0x87, 0xe8,
    0xe8, 0xe8, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xda, 0xda, 0xda, 0x87,
    0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff, 0xff, 0xda, 0xda, 0xda, 0x87,
    0x87, 0x87, 0xe8, 0xe8,
    0xe8, 0xff, 0xff, 0xff, 0xda, 0xda, 0xda, 0x87, 0x87, 0x87, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd5, 0xd5, 0xd5, 0x87, 0x87,
    0x87, 0xe8, 0xe8, 0xe8,
    0xff, 0xff, 0xff, 0xda, 0xda, 0xda, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8,
    0xff, 0xff, 0xff, 0xda,
    0xda, 0xda, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xd7, 0xd7, 0xd7, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff,
    0xff, 0xff, 0xda, 0xda,
    0xda, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xd7, 0xd7, 0xd7,
    0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff, 0xff, 0xda, 0xda, 0xda,
    0x87, 0x87, 0x87, 0xe8,
    0xe8, 0xe8, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd7, 0xd7, 0xd7, 0x87,
    0x87, 0x87, 0xe8, 0xe8,
    0xe8, 0xff, 0xff, 0xff, 0xdc, 0xdc, 0xdc, 0x87, 0x87, 0x87, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xd9, 0xd9, 0xd9, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8,
    0xff, 0xff, 0xff, 0xdc,
    0xdc, 0xdc, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xdb, 0xdb,
    0xdb, 0x87, 0x87, 0x87, 0xe8, 0xe8, 0xe8, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdb, 0xdb, 0xdb,
    0x87, 0x87, 0x87, 0xe8,
    0xe8, 0xe8, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xdc, 0xdc, 0xdc, 0x87, 0x87, 0x87, 0xff, 0xff,
    0xff, 0x0b, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xdc,
    0xdc, 0xdc, 0xff, 0xff, 0xff, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0x0b
};

static void
QZ_DrawResizeIcon (_THIS, RgnHandle dirtyRegion)
{

    /* Check if we should draw the resize icon */
    if (SDL_VideoSurface->flags & SDL_RESIZABLE) {

        Rect icon;
        SetRect (&icon, SDL_VideoSurface->w - 13, SDL_VideoSurface->h - 13,
                 SDL_VideoSurface->w, SDL_VideoSurface->h);

        if (RectInRgn (&icon, dirtyRegion)) {

            SDL_Rect icon_rect;

            /* Create the icon image */
            if (resize_icon == NULL) {

                SDL_RWops *rw;
                SDL_Surface *tmp;

                rw = SDL_RWFromConstMem (QZ_ResizeIcon,
                                         sizeof (QZ_ResizeIcon));
                tmp = SDL_LoadBMP_RW (rw, SDL_TRUE);

                resize_icon =
                    SDL_ConvertSurface (tmp, SDL_VideoSurface->format,
                                        SDL_SRCCOLORKEY);
                SDL_SetColorKey (resize_icon, SDL_SRCCOLORKEY, 0xFFFFFF);

                SDL_FreeSurface (tmp);
            }

            icon_rect.x = SDL_VideoSurface->w - 13;
            icon_rect.y = SDL_VideoSurface->h - 13;
            icon_rect.w = 13;
            icon_rect.h = 13;

            SDL_BlitSurface (resize_icon, NULL, SDL_VideoSurface, &icon_rect);
        }
    }
}

static void
QZ_UpdateRects (_THIS, int numRects, SDL_Rect * rects)
{

    if ([qz_window isMiniaturized]) {

        /* Do nothing if miniaturized */
    }

    else if (!QZ_IsWindowObscured (qz_window)) {

        /* Use direct copy to flush contents to the display */
        CGrafPtr savePort;
        CGrafPtr dstPort, srcPort;
        const BitMap *dstBits, *srcBits;
        Rect dstRect, srcRect;
        Point offset;
        int i;

        GetPort (&savePort);

        dstPort = CreateNewPortForCGDisplayID ((UInt32) display_id);
        srcPort =[window_view qdPort];

        offset.h = 0;
        offset.v = 0;
        SetPort (srcPort);
        LocalToGlobal (&offset);

        SetPort (dstPort);

        LockPortBits (dstPort);
        LockPortBits (srcPort);

        dstBits = GetPortBitMapForCopyBits (dstPort);
        srcBits = GetPortBitMapForCopyBits (srcPort);

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

            SetRect (&srcRect, rects[i].x, rects[i].y,
                     rects[i].x + rects[i].w, rects[i].y + rects[i].h);

            SetRect (&dstRect,
                     rects[i].x + offset.h,
                     rects[i].y + offset.v,
                     rects[i].x + rects[i].w + offset.h,
                     rects[i].y + rects[i].h + offset.v);

            CopyBits (srcBits, dstBits, &srcRect, &dstRect, srcCopy, NULL);

        }

        SetPort (savePort);
    } else {
        /* Use QDFlushPortBuffer() to flush content to display */
        int i;
        RgnHandle dirty = NewRgn ();
        RgnHandle temp = NewRgn ();

        SetEmptyRgn (dirty);

        /* Build the region of dirty rectangles */
        for (i = 0; i < numRects; i++) {

            MacSetRectRgn (temp, rects[i].x, rects[i].y,
                           rects[i].x + rects[i].w, rects[i].y + rects[i].h);
            MacUnionRgn (dirty, temp, dirty);
        }

        QZ_DrawResizeIcon (this, dirty);

        /* Flush the dirty region */
        QDFlushPortBuffer ([window_view qdPort], dirty);
        DisposeRgn (dirty);
        DisposeRgn (temp);
    }
}

static void
QZ_VideoQuit (_THIS)
{

    CGDisplayFadeReservationToken fade_token =
        kCGDisplayFadeReservationInvalidToken;

    /* Restore gamma settings */
    CGDisplayRestoreColorSyncSettings ();

    /* Ensure the cursor will be visible and working when we quit */
    CGDisplayShowCursor (display_id);
    CGAssociateMouseAndMouseCursorPosition (1);

    if (mode_flags & SDL_FULLSCREEN) {
        /* Fade to black to hide resolution-switching flicker (and garbage
           that is displayed by a destroyed OpenGL context, if applicable) */
        if (CGAcquireDisplayFadeReservation (5, &fade_token) ==
            kCGErrorSuccess) {
            CGDisplayFade (fade_token, 0.3, kCGDisplayBlendNormal,
                           kCGDisplayBlendSolidColor, 0.0, 0.0, 0.0, TRUE);
        }
        QZ_UnsetVideoMode (this, TRUE);
        if (fade_token != kCGDisplayFadeReservationInvalidToken) {
            CGDisplayFade (fade_token, 0.5, kCGDisplayBlendSolidColor,
                           kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
            CGReleaseDisplayFadeReservation (fade_token);
        }
    } else
        QZ_UnsetVideoMode (this, TRUE);

    CGPaletteRelease (palette);

    if (opengl_library) {
        SDL_UnloadObject (opengl_library);
        opengl_library = NULL;
    }
    this->gl_config.driver_loaded = 0;
}

#if 0                           /* Not used (apparently, it's really slow) */
static int
QZ_FillHWRect (_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
{

    CGSDisplayHWFill (display_id, rect->x, rect->y, rect->w, rect->h, color);

    return 0;
}
#endif

static int
QZ_LockHWSurface (_THIS, SDL_Surface * surface)
{

    return 1;
}

static void
QZ_UnlockHWSurface (_THIS, SDL_Surface * surface)
{

}

static int
QZ_AllocHWSurface (_THIS, SDL_Surface * surface)
{
    return (-1);                /* unallowed (no HWSURFACE support here). */
}

static void
QZ_FreeHWSurface (_THIS, SDL_Surface * surface)
{
}

/*
 int QZ_FlipHWSurface (_THIS, SDL_Surface *surface) {
     return 0;
 }
 */

/* Gamma functions */
int
QZ_SetGamma (_THIS, float red, float green, float blue)
{

    const CGGammaValue min = 0.0, max = 1.0;

    if (red == 0.0)
        red = FLT_MAX;
    else
        red = 1.0 / red;

    if (green == 0.0)
        green = FLT_MAX;
    else
        green = 1.0 / green;

    if (blue == 0.0)
        blue = FLT_MAX;
    else
        blue = 1.0 / blue;

    if (CGDisplayNoErr == CGSetDisplayTransferByFormula
        (display_id, min, max, red, min, max, green, min, max, blue)) {

        return 0;
    } else {

        return -1;
    }
}

int
QZ_GetGamma (_THIS, float *red, float *green, float *blue)
{

    CGGammaValue dummy;
    if (CGDisplayNoErr == CGGetDisplayTransferByFormula
        (display_id, &dummy, &dummy, red,
         &dummy, &dummy, green, &dummy, &dummy, blue))

        return 0;
    else
        return -1;
}

int
QZ_SetGammaRamp (_THIS, Uint16 * ramp)
{

    const CGTableCount tableSize = 255;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];

    int i;

    /* Extract gamma values into separate tables, convert to floats between 0.0 and 1.0 */
    for (i = 0; i < 256; i++)
        redTable[i % 256] = ramp[i] / 65535.0;

    for (i = 256; i < 512; i++)
        greenTable[i % 256] = ramp[i] / 65535.0;

    for (i = 512; i < 768; i++)
        blueTable[i % 256] = ramp[i] / 65535.0;

    if (CGDisplayNoErr == CGSetDisplayTransferByTable
        (display_id, tableSize, redTable, greenTable, blueTable))
        return 0;
    else
        return -1;
}

int
QZ_GetGammaRamp (_THIS, Uint16 * ramp)
{

    const CGTableCount tableSize = 255;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];
    CGTableCount actual;
    int i;

    if (CGDisplayNoErr != CGGetDisplayTransferByTable
        (display_id, tableSize, redTable, greenTable, blueTable, &actual) ||
        actual != tableSize)

        return -1;

    /* Pack tables into one array, with values from 0 to 65535 */
    for (i = 0; i < 256; i++)
        ramp[i] = redTable[i % 256] * 65535.0;

    for (i = 256; i < 512; i++)
        ramp[i] = greenTable[i % 256] * 65535.0;

    for (i = 512; i < 768; i++)
        ramp[i] = blueTable[i % 256] * 65535.0;

    return 0;
}