mirror of
https://github.com/zoriya/react-native-svg.git
synced 2026-05-26 20:32:23 +00:00
Horcrux
56 lines
1.6 KiB
Objective-C
56 lines
1.6 KiB
Objective-C
/**
|
|
* Copyright (c) 2015-present, Horcrux.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the MIT-style license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#import "RNSVGRadialGradient.h"
|
|
|
|
#import "RCTConvert+RNSVG.h"
|
|
#import "RCTLog.h"
|
|
|
|
@implementation RNSVGRadialGradient
|
|
{
|
|
CGGradientRef _gradient;
|
|
CGPoint _focusPoint;
|
|
CGPoint _centerPoint;
|
|
CGFloat _radius;
|
|
CGFloat _radiusRatio;
|
|
}
|
|
|
|
- (instancetype)initWithArray:(NSArray<NSNumber *> *)array
|
|
{
|
|
if ((self = [super initWithArray:array])) {
|
|
if (array.count < 7) {
|
|
RCTLogError(@"-[%@ %@] expects 7 elements, received %@",
|
|
self.class, NSStringFromSelector(_cmd), array);
|
|
return nil;
|
|
}
|
|
_radius = [RCTConvert CGFloat:array[3]];
|
|
_radiusRatio = [RCTConvert CGFloat:array[4]] / _radius;
|
|
_focusPoint.x = [RCTConvert CGFloat:array[1]];
|
|
_focusPoint.y = [RCTConvert CGFloat:array[2]] / _radiusRatio;
|
|
_centerPoint.x = [RCTConvert CGFloat:array[5]];
|
|
_centerPoint.y = [RCTConvert CGFloat:array[6]] / _radiusRatio;
|
|
_gradient = CGGradientRetain([RCTConvert CGGradient:array offset:7]);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (void)dealloc
|
|
{
|
|
CGGradientRelease(_gradient);
|
|
}
|
|
|
|
- (void)paint:(CGContextRef)context
|
|
{
|
|
CGAffineTransform transform = CGAffineTransformMakeScale(1, _radiusRatio);
|
|
CGContextConcatCTM(context, transform);
|
|
CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
|
|
CGContextDrawRadialGradient(context, _gradient, _focusPoint, 0, _centerPoint, _radius, extendOptions);
|
|
}
|
|
|
|
@end
|