132 lines
5.2 KiB
Objective-C
132 lines
5.2 KiB
Objective-C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#import "CGMouseDeltaFix.h"
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#import "CGPrivateAPI.h"
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#import <Foundation/Foundation.h>
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#import <mach-o/dyld.h>
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// We will try to automatically fall back to using the original CGGetLastMouseDelta when we are on a system new enough to have the fix. Any version of CoreGraphics past 1.93.0 will have the fixed version.
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static BOOL originalVersionShouldWork = YES;
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static CGMouseDelta CGFix_Mouse_DeltaX, CGFix_Mouse_DeltaY;
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static void CGFix_NotificationCallback(CGSNotificationType note, CGSNotificationData data, CGSByteCount dataLength, CGSNotificationArg arg);
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static CGSRegisterNotifyProcType registerNotifyProc = NULL;
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void CGFix_Initialize()
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{
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NSAutoreleasePool *pool;
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NSBundle *cgBundle;
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NSString *version;
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NSArray *components;
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if (registerNotifyProc)
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// We've already been called once and have registered our callbacks. If the original version works, this will be NULL, but we'll end up doing nothing (again, possibly).
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return;
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//NSLog(@"CGFix_Initialize\n");
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pool = [[NSAutoreleasePool alloc] init];
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cgBundle = [NSBundle bundleWithPath: @"/System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework"];
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if (!cgBundle) {
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// If it's moved, it must be newer than what we know about and should work
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//NSLog(@"No /System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework\n");
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goto done;
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}
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version = [[cgBundle infoDictionary] objectForKey: @"CFBundleShortVersionString"];
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components = [version componentsSeparatedByString: @"."];
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//NSLog(@"version = %@\n", version);
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//NSLog(@"components = %@\n", components);
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if ([components count] < 2)
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// We don't understand this versioning scheme. Must have changed.
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goto done;
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if (![[components objectAtIndex: 0] isEqualToString: @"1"] || [[components objectAtIndex: 1] intValue] > 93)
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// This version should be new enough to work
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goto done;
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// Look up the function pointer we need to register our callback.
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if (!NSIsSymbolNameDefined("_CGSRegisterNotifyProc")) {
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//NSLog(@"No _CGSRegisterNotifyProc\n");
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goto done;
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}
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registerNotifyProc = NSAddressOfSymbol(NSLookupAndBindSymbol("_CGSRegisterNotifyProc"));
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//NSLog(@"registerNotifyProc = 0x%08x", registerNotifyProc);
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// Must not work if we got here
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originalVersionShouldWork = NO;
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// We want to catch all the events that could possible indicate mouse movement and sum them up
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registerNotifyProc( CGFix_NotificationCallback, kCGSEventNotificationMouseMoved, NULL);
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registerNotifyProc( CGFix_NotificationCallback, kCGSEventNotificationLeftMouseDragged, NULL);
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registerNotifyProc( CGFix_NotificationCallback, kCGSEventNotificationRightMouseDragged, NULL);
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registerNotifyProc( CGFix_NotificationCallback, kCGSEventNotificationNotificationOtherMouseDragged, NULL);
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done:
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[pool release];
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}
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void CGFix_GetLastMouseDelta(CGMouseDelta *dx, CGMouseDelta *dy)
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{
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if (originalVersionShouldWork) {
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CGGetLastMouseDelta(dx, dy);
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return;
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}
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*dx = CGFix_Mouse_DeltaX;
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*dy = CGFix_Mouse_DeltaY;
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CGFix_Mouse_DeltaX = CGFix_Mouse_DeltaY = 0;
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}
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static void CGFix_NotificationCallback(CGSNotificationType note, CGSNotificationData data, CGSByteCount dataLength, CGSNotificationArg arg)
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{
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CGSEventRecordPtr event;
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//fprintf(stderr, "CGFix_NotificationCallback(note=%d, date=0x%08x, dataLength=%d, arg=0x%08x)\n", note, data, dataLength, arg);
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#ifdef DEBUG
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if ((note != kCGSEventNotificationMouseMoved &&
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note != kCGSEventNotificationLeftMouseDragged &&
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note != kCGSEventNotificationRightMouseDragged &&
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note != kCGSEventNotificationNotificationOtherMouseDragged) ||
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dataLength != sizeof (CGSEventRecord))
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fprintf(stderr, "Unexpected arguments to callback function CGFix_NotificationCallback(note=%d, date=0x%08x, dataLength=%d, arg=0x%08x)\n", note, data, dataLength, arg);
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abort();
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}
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#endif
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event = (CGSEventRecordPtr)data;
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CGFix_Mouse_DeltaX += event->data.move.deltaX;
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CGFix_Mouse_DeltaY += event->data.move.deltaY;
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//fprintf(stderr, " dx += %d, dy += %d\n", event->data.move.deltaX, event->data.move.deltaY);
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}
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