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//
// GTMNSBezierPath+CGPath.m
//
// Category for extracting a CGPathRef from a NSBezierPath
//
// Copyright 2006-2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import "GTMNSBezierPath+CGPath.h"
#import "GTMDefines.h"
#import "GTMGarbageCollection.h"
@implementation NSBezierPath (GTMBezierPathCGPathAdditions)
// Extract a CGPathRef from a NSBezierPath.
//
// Args:
//
// Returns:
// Converted CGPathRef.
// nil if failure.
- (CGPathRef)gtm_CGPath {
CGMutablePathRef thePath = CGPathCreateMutable();
if (!thePath) return nil;
NSInteger elementCount = [self elementCount];
// The maximum number of points is 3 for a NSCurveToBezierPathElement.
// (controlPoint1, controlPoint2, and endPoint)
NSPoint controlPoints[3];
for (NSInteger i = 0; i < elementCount; i++) {
switch ([self elementAtIndex:i associatedPoints:controlPoints]) {
case NSMoveToBezierPathElement:
CGPathMoveToPoint(thePath, &CGAffineTransformIdentity,
controlPoints[0].x, controlPoints[0].y);
break;
case NSLineToBezierPathElement:
CGPathAddLineToPoint(thePath, &CGAffineTransformIdentity,
controlPoints[0].x, controlPoints[0].y);
break;
case NSCurveToBezierPathElement:
CGPathAddCurveToPoint(thePath, &CGAffineTransformIdentity,
controlPoints[0].x, controlPoints[0].y,
controlPoints[1].x, controlPoints[1].y,
controlPoints[2].x, controlPoints[2].y);
break;
case NSClosePathBezierPathElement:
CGPathCloseSubpath(thePath);
break;
default: // COV_NF_START
_GTMDevLog(@"Unknown element at [NSBezierPath (GTMBezierPathCGPathAdditions) cgPath]");
break; // COV_NF_END
};
}
return (CGPathRef)GTMCFAutorelease(thePath);
}
@end
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