sdl_quartzvideo.m

SDL库 在进行视频显示程序spcaview安装时必须的库文件

    }

    /* 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;
    NSRect contentRect;
    BOOL isCustom = NO;
    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;

    /* The code below checks for any valid custom windows and views.  If none are
       available, then we create new ones.  Window/View code was added in FULLSCREEN
       so that special events like the changing of the cursor image would be handled
       ( only the front-most and active application can change the cursor appearance
       and with no valid window/view in FULLSCREEN, SDL wouldn't update its cursor. )
    */
	/* Check for user-specified window and view */
    {
        char *windowPtrString = getenv ("SDL_NSWindowPointer");
        char *viewPtrString = getenv ("SDL_NSQuickDrawViewPointer");
    
        contentRect = NSMakeRect (0, 0, width, height);
	
        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 ];
        }
    }
    /* Check if we should recreate the window */
    if (qz_window == nil) {
        /* Manually create a window, avoids having a nib file resource */
        qz_window = [ [ SDL_QuartzWindow alloc ] 
            initWithContentRect:contentRect
                styleMask:nil 
                    backing:NSBackingStoreBuffered
                        defer:NO ];

        if (qz_window != nil) {
            [ qz_window setAcceptsMouseMovedEvents:YES ];
            [ qz_window setViewsNeedDisplay:NO ];
        }
    }
    /* 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 ];
        }
    }

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

        CGLError err;
        CGLContextObj ctx;

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

        /* Initialize the NSView and add it to our window.  The presence of a valid window and
           view allow the cursor to be changed whilst in fullscreen.*/
        window_view = [ [ NSView alloc ] initWithFrame:contentRect ];
        [ [ qz_window contentView ] addSubview:window_view ];	
        [ window_view release ];

        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_OPENGL;
    }

    /* 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_OPENGL) || 
                  (flags & SDL_OPENGL) ) {
            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 ];*/ /* no need to set this as it's the default for NSWindows */
        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 ] ];
        [ qz_window setContentView: [ [ [ SDL_QuartzView 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_OPENGL ) {

        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_OPENGL;
    }
    /* 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);