Curtis Hard
5a03e8c27c
- Also added IJSVGUnit so that graidents know if to work out from the current bounds or not when creating the angle points - Added IJSVGImage which is a wrapper around loading base64 encoded images - Added IJSVGPattern which is based on IJSVGGroup and will draw a pattern inside a nodes clipped path
131 lines
4.3 KiB
Objective-C
131 lines
4.3 KiB
Objective-C
//
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// IJSVGGradient.m
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// IJSVGExample
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//
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// Created by Curtis Hard on 03/09/2014.
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// Copyright (c) 2014 Curtis Hard. All rights reserved.
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//
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#import "IJSVGGradient.h"
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@implementation IJSVGGradient
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@synthesize gradient, CGGradient;
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@synthesize angle, startPoint, endPoint;
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@synthesize x1, x2, y1, y2;
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- (void)dealloc
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{
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[gradient release], gradient = nil;
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if( CGGradient != nil )
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CGGradientRelease(CGGradient);
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[super dealloc];
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}
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- (id)copyWithZone:(NSZone *)zone
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{
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IJSVGGradient * clone = [super copyWithZone:zone];
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clone.gradient = [[self.gradient copy] autorelease];
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clone.startPoint = self.startPoint;
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clone.endPoint = self.endPoint;
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return clone;
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}
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+ (CGFloat *)computeColorStopsFromString:(NSXMLElement *)element
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colors:(NSArray **)someColors
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{
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// find each stop element
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NSArray * stops = [element nodesForXPath:@"stop"
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error:nil];
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NSMutableArray * colors = [[[NSMutableArray alloc] init] autorelease];
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CGFloat * stopsParams = (CGFloat *)malloc(stops.count*sizeof(CGFloat));
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NSInteger i = 0;
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for( NSXMLElement * stop in stops )
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{
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// find the offset
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CGFloat offset = [[[stop attributeForName:@"offset"] stringValue] floatValue];
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if( offset > 1 )
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offset /= 100.f;
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stopsParams[i++] = offset;
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// find the stop opacity
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CGFloat stopOpacity = 1.f;
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NSXMLNode * stopOpacityAttribute = [stop attributeForName:@"stop-opacity"];
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if( stopOpacityAttribute != nil )
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stopOpacity = [[stopOpacityAttribute stringValue] floatValue];
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// find the stop color
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NSColor * stopColor = [IJSVGColor colorFromHEXString:[[stop attributeForName:@"stop-color"] stringValue]
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alpha:stopOpacity];
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// no hex, grab it from predefined
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if( stopColor == nil )
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{
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stopColor = [IJSVGColor colorFromPredefinedColorName:[[stop attributeForName:@"stop-color"] stringValue]];
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if( stopColor != nil && stopOpacity != 1.f )
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stopColor = [IJSVGColor changeAlphaOnColor:stopColor
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to:stopOpacity];
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}
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// add it into the array
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if( stopColor != nil )
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[(NSMutableArray *)colors addObject:stopColor];
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NSXMLNode * styleAttribute = [stop attributeForName:@"style"];
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if( styleAttribute != nil )
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{
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IJSVGStyle * style = [IJSVGStyle parseStyleString:[styleAttribute stringValue]];
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NSColor * color = [style property:@"stop-color"];
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// we have a color!
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if( color != nil )
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{
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// is there a stop opacity?
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NSNumber * number = nil;
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if( (number = [style property:@"stop-opacity"] ) != nil )
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color = [IJSVGColor changeAlphaOnColor:color
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to:[number floatValue]];
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else
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color = [IJSVGColor changeAlphaOnColor:color
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to:stopOpacity];
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[(NSMutableArray *)colors addObject:color];
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}
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}
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}
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*someColors = colors;
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return stopsParams;
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}
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- (CGGradientRef)CGGradient
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{
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// store it in the cache
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if(CGGradient != nil)
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return CGGradient;
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// actually create the gradient
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NSInteger num = self.gradient.numberOfColorStops;
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CGFloat * locations = malloc(sizeof(CGFloat)*num);
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CFMutableArrayRef colors = CFArrayCreateMutable(kCFAllocatorDefault, (CFIndex)num, &kCFTypeArrayCallBacks);
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for( NSInteger i = 0; i < num; i++ )
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{
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NSColor * color;
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[self.gradient getColor:&color
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location:&locations[i]
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atIndex:i];
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CFArrayAppendValue(colors, color.CGColor);
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}
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CGGradientRef result = CGGradientCreateWithColors(self.gradient.colorSpace.CGColorSpace, colors, locations);
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CFRelease(colors);
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free(locations);
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return CGGradient = result;
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}
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- (void)drawInContextRef:(CGContextRef)ctx
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path:(IJSVGPath *)path
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{
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}
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@end
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