TRCIFilterWindow.m

//
//  TRCIEffectOverlay.m
//  Tranquility
//
//  Assumed by Lorenzo Swank on 2014 FEB 05 and
//  updated for Mac OS 10.9.
//
//  Orginally Created by Nicholas Jitkoff on 5/8/07 as Nocturne.
//  Licensed under the Apache 2.0 license and distributed as such
//  on https://code.google.com/p/blacktree-nocturne
//

#import "TRCIFilterWindow.h"
CGSConnection cid;

void DXSetWindowTag(int wid, CGSWindowTag tag, int state)
{
    CGSConnection cid;

    cid = _CGSDefaultConnection();
    CGSWindowTag tags[2];
    tags[0] = tags[1] = 0;
    OSStatus retVal = CGSGetWindowTags(cid, wid, tags, 32);

    if (!retVal)
    {
        tags[0] = tag;

        if (state)
        {
            retVal = CGSSetWindowTags(cid, wid, tags, 32);

            if (retVal)
            {
                NSLog(@"CGSSetWindowTags returned %d", retVal);
            }
        }
        else
        {
            retVal = CGSClearWindowTags(cid, wid, tags, 32);

            if (retVal)
            {
                NSLog(@"CGSClearWindowTags returned %d", retVal);
            }
        }
    }
}

void DXSetWindowIgnoresMouse(int wid, int state)
{
    DXSetWindowTag(wid, CGSTagTransparent, state);
}

#define NSRectToCGRect(r) CGRectMake(r.origin.x, r.origin.y, r.size.width, r.size.height)
CGRect TRCGRectFromScreenFrame(NSRect rect)
{
    CGRect screenBounds = CGDisplayBounds(kCGDirectMainDisplay);
    CGRect cgrect = NSRectToCGRect(rect);

    cgrect.origin.y += screenBounds.size.height;
    cgrect.origin.y -= rect.size.height;

    return cgrect;
}

CGSConnection cid;

@implementation TRCIFilterWindow
+ (void)initialize
{
    cid = _CGSDefaultConnection();
}

- (id)init
{
    self = [self initWithContentRect:[[NSScreen mainScreen] frame]
                           styleMask:NSBorderlessWindowMask
                             backing:NSBackingStoreBuffered
                               defer:NO];

    if (self != nil)
    {
        [self setHidesOnDeactivate:NO];
        [self setCanHide:NO];
        [self setIgnoresMouseEvents:YES];
        [self setLevel:CGWindowLevelForKey(kCGCursorWindowLevelKey)];
        [self setOpaque:NO];
        [self setBackgroundColor:[NSColor colorWithDeviceWhite:0.0 alpha:0.0]];
        wid = [self windowNumber];
    }

    return self;
}

- (void)dealloc
{
    [self setFilter:nil];
    [super dealloc];
}

- (void)setFilter:(NSString*)filterName
{
    if (fid)
    {
        CGSRemoveWindowFilter(cid, wid, fid);
        CGSReleaseCIFilter(cid, fid);
    }

    if (filterName)
    {
        CGError error = CGSNewCIFilterByName(cid, (CFStringRef)filterName, &fid);

        if (noErr == error)
        {
            error = CGSAddWindowFilter(cid, wid, fid, 0x00003001);

            if (error)
            {
                NSLog(@"addfilter err %d", error);
            }
        }

        if (error)
        {
            NSLog(@"setfilter err %d", error);
        }
    }
}

- (void)setFilterValues:(NSDictionary*)filterValues
{
    if (!fid)
    {
        return;
    }

    CGSSetCIFilterValuesFromDictionary(cid, fid, (CFDictionaryRef)filterValues);
}

@end