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Added support for high quality zooming using CATiledLayer
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Rodrigo Hammerly
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Rodrigo Hammerly
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Aug 24, 2011
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@@ -101,5 +101,4 @@ - (void) setPageSize:(CGSize)value { | |
| pageSize = value; | ||
| [self flush]; | ||
| } | ||
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| @end | ||
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| // | ||
| // LeavesTiledLayer.h | ||
| // Leaves | ||
| // | ||
| // Created by Rodrigo Hammerly on 8/24/11. | ||
| // Copyright 2011 Tom Brow. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| #import <QuartzCore/QuartzCore.h> | ||
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| @interface LeavesTiledLayer : CATiledLayer { | ||
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| } | ||
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| @end |
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| @@ -0,0 +1,59 @@ | ||
| // | ||
| // LeavesTiledLayer.m | ||
| // Leaves | ||
| // | ||
| // Created by Rodrigo Hammerly on 8/24/11. | ||
| // Copyright 2011 Tom Brow. All rights reserved. | ||
| // | ||
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| #import "LeavesTiledLayer.h" | ||
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| #define ZOOM_LEVELS 5 | ||
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| @implementation LeavesTiledLayer | ||
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| + (CFTimeInterval)fadeDuration | ||
| { | ||
| return 0.0; // No fading wanted | ||
| } | ||
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| + (id<CAAction>)defaultActionForKey:(NSString *)event | ||
| { | ||
| return nil; | ||
| } | ||
| #pragma mark LeavesTiledLayer instance methods | ||
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| - (id)init | ||
| { | ||
| if ((self = [super init])) | ||
| { | ||
| self.levelsOfDetail = ZOOM_LEVELS; | ||
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| self.levelsOfDetailBias = (ZOOM_LEVELS - 1); | ||
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| CGFloat screenScale; // Points to pixels | ||
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| UIScreen *mainScreen = [UIScreen mainScreen]; | ||
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| if ([mainScreen respondsToSelector:@selector(scale)]) | ||
| screenScale = [mainScreen scale]; | ||
| else | ||
| screenScale = 1.0f; | ||
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| CGRect screenBounds = [mainScreen bounds]; // Is in points | ||
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| CGFloat w_pixels = (screenBounds.size.width * screenScale); | ||
| CGFloat h_pixels = (screenBounds.size.height * screenScale); | ||
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| CGFloat max = (w_pixels < h_pixels) ? h_pixels : w_pixels; | ||
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| CGFloat sizeOfTiles = (max < 512.0f) ? 512.0f : 1024.0f; | ||
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| self.tileSize = CGSizeMake(sizeOfTiles, sizeOfTiles); | ||
| self.backgroundColor = [UIColor clearColor].CGColor; | ||
| } | ||
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| return self; | ||
| } | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,21 @@ | ||
| // | ||
| // LeavesTiledLayerDelegate.h | ||
| // Leaves | ||
| // | ||
| // Created by Rodrigo Hammerly on 8/24/11. | ||
| // Copyright 2011 Tom Brow. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| @protocol LeavesViewDataSource; | ||
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| @interface LeavesTiledLayerDelegate : NSObject { | ||
| id<LeavesViewDataSource> dataSource; | ||
| NSInteger pageIndex; | ||
| } | ||
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| @property (assign) id<LeavesViewDataSource> dataSource; | ||
| @property (assign) NSInteger pageIndex; | ||
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| - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)context; | ||
| @end |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,33 @@ | ||
| // | ||
| // LeavesTiledLayerDelegate.m | ||
| // Leaves | ||
| // | ||
| // Created by Rodrigo Hammerly on 8/24/11. | ||
| // Copyright 2011 Tom Brow. All rights reserved. | ||
| // | ||
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| #import "LeavesTiledLayerDelegate.h" | ||
| #import "LeavesView.h" | ||
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| @implementation LeavesTiledLayerDelegate | ||
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| @synthesize dataSource; | ||
| @synthesize pageIndex; | ||
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| - (id)init { | ||
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| if ((self = [super init])) { | ||
| self.pageIndex = 0; | ||
| } | ||
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| return self; | ||
| } | ||
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| #pragma mark LeavesViewTiledLayer delegated methods | ||
| - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)context { | ||
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| [self.dataSource renderTiledPageAtIndex:self.pageIndex forLayer:layer inContext:context]; | ||
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| } | ||
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| @end |
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