mirror of
https://github.com/zoriya/react-native-svg.git
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108 lines
2.1 KiB
Objective-C
108 lines
2.1 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Horcrux.
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* All rights reserved.
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*
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* This source code is licensed under the MIT-style license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RNSVGNode.h"
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#import "RNSVGContainer.h"
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@implementation RNSVGNode
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- (void)insertSubview:(UIView *)subview atIndex:(NSInteger)index
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{
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[self invalidate];
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[super insertSubview:subview atIndex:index];
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}
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- (void)removeFromSuperview
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{
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[self invalidate];
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[super removeFromSuperview];
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}
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- (void)setOpacity:(CGFloat)opacity
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{
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[self invalidate];
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_opacity = opacity;
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}
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- (void)setTransform:(CGAffineTransform)transform
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{
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[self invalidate];
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super.transform = transform;
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}
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- (void)invalidate
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{
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id<RNSVGContainer> container = (id<RNSVGContainer>)self.superview;
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[container invalidate];
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}
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- (void)renderTo:(CGContextRef)context
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{
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float opacity = self.opacity;
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BOOL transparent = NO;
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if (opacity <= 0) {
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// Nothing to paint
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return;
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}
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if (opacity >= 1) {
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opacity = 1;
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transparent = YES;
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}
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// This needs to be painted on a layer before being composited.
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CGContextSaveGState(context);
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CGContextConcatCTM(context, self.transform);
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CGContextSetAlpha(context, opacity);
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if (transparent) {
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CGContextBeginTransparencyLayer(context, NULL);
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}
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[self renderLayerTo:context];
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if (transparent) {
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CGContextEndTransparencyLayer(context);
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}
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CGContextRestoreGState(context);
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}
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- (void)setClipPath:(CGPathRef)clipPath
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{
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if (clipPath == _clipPath) {
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return;
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}
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[self invalidate];
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CGPathRelease(_clipPath);
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_clipPath = CGPathRetain(clipPath);
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}
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- (void)dealloc
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{
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CGPathRelease(_clipPath);
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}
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- (void)renderLayerTo:(CGContextRef)context
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{
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// abstract
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}
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- (void)clip:(CGContextRef)context
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{
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if (self.clipPath) {
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CGContextAddPath(context, self.clipPath);
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if (self.clipRule == kRNSVGCGFCRuleEvenodd) {
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CGContextEOClip(context);
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} else {
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CGContextClip(context);
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}
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}
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}
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@end
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