Curtis Hard
67 lines
1.8 KiB
Objective-C
67 lines
1.8 KiB
Objective-C
//
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// IJSVGPatternLayer.m
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// IJSVGExample
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//
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// Created by Curtis Hard on 07/01/2017.
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// Copyright © 2017 Curtis Hard. All rights reserved.
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//
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#import "IJSVGPatternLayer.h"
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@implementation IJSVGPatternLayer
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@synthesize pattern;
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@synthesize patternNode;
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- (void)dealloc
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{
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[pattern release], pattern = nil;
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[patternNode release], patternNode = nil;
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[super dealloc];
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}
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- (id)init
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{
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if((self = [super init]) != nil) {
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self.requiresBackingScaleHelp = YES;
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self.shouldRasterize = YES;
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}
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return self;
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}
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void IJSVGPatternDrawingCallBack(void * info, CGContextRef ctx) {
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// reassign the layer
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IJSVGPatternLayer * layer = (IJSVGPatternLayer *)info;
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[layer.pattern renderInContext:ctx];
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};
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- (void)drawInContext:(CGContextRef)ctx
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{
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// holder for callback
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static const CGPatternCallbacks callbacks = {0, &IJSVGPatternDrawingCallBack, NULL};
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// create base pattern space
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CGColorSpaceRef patternSpace = CGColorSpaceCreatePattern(NULL);
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CGContextSetFillColorSpace(ctx, patternSpace);
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CGColorSpaceRelease(patternSpace);
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// create the pattern
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CGRect rect = self.bounds;
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CGPatternRef ref = CGPatternCreate( (void *)self, self.bounds,
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CGAffineTransformIdentity,
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roundf(rect.size.width*self.patternNode.width.value),
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roundf(rect.size.height*self.patternNode.height.value),
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kCGPatternTilingConstantSpacing,
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true, &callbacks);
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// set the pattern then release it
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CGFloat alpha = 1.f;
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CGContextSetFillPattern(ctx, ref, &alpha);
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CGPatternRelease(ref);
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// fill it
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CGContextFillRect(ctx, rect);
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}
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@end
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