136 lines
4.5 KiB
Objective-C
136 lines
4.5 KiB
Objective-C
//------------------------------------------------------------------------
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// Copyright 2010 (c) Jeff Brown <spadix@users.sourceforge.net>
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//
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// This file is part of the ZBar Bar Code Reader.
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//
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// The ZBar Bar Code Reader is free software; you can redistribute it
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// and/or modify it under the terms of the GNU Lesser Public License as
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// published by the Free Software Foundation; either version 2.1 of
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// the License, or (at your option) any later version.
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//
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// The ZBar Bar Code Reader is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser Public License for more details.
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//
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// You should have received a copy of the GNU Lesser Public License
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// along with the ZBar Bar Code Reader; if not, write to the Free
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// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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// Boston, MA 02110-1301 USA
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//
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// http://sourceforge.net/projects/zbar
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//------------------------------------------------------------------------
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#import <UIKit/UIKit.h>
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#import "ZBarImageScanner.h"
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@class AVCaptureSession, AVCaptureDevice;
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@class CALayer;
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@class ZBarImageScanner, ZBarCaptureReader, ZBarReaderView;
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// delegate is notified of decode results.
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@protocol ZBarReaderViewDelegate < NSObject >
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- (void) readerView: (ZBarReaderView*) readerView
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didReadSymbols: (ZBarSymbolSet*) symbols
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fromImage: (UIImage*) image;
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@end
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// read barcodes from the displayed video preview. the view maintains
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// a complete video capture session feeding a ZBarCaptureReader and
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// presents the associated preview with symbol tracking annotations.
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@interface ZBarReaderView
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: UIView
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{
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id<ZBarReaderViewDelegate> readerDelegate;
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ZBarCaptureReader *captureReader;
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CGRect scanCrop, effectiveCrop;
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CGAffineTransform previewTransform;
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CGFloat zoom, zoom0, maxZoom;
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UIColor *trackingColor;
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BOOL tracksSymbols, showsFPS;
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NSInteger torchMode;
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UIInterfaceOrientation interfaceOrientation;
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NSTimeInterval animationDuration;
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CALayer *preview, *overlay, *tracking, *cropLayer;
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UIView *fpsView;
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UILabel *fpsLabel;
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UIPinchGestureRecognizer *pinch;
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CGFloat imageScale;
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CGSize imageSize;
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BOOL started, running;
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}
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// supply a pre-configured image scanner.
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- (id) initWithImageScanner: (ZBarImageScanner*) imageScanner;
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// start the video stream and barcode reader.
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- (void) start;
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// stop the video stream and barcode reader.
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- (void) stop;
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// clear the internal result cache
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- (void) flushCache;
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// compensate for device/camera/interface orientation
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- (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) orient
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duration: (NSTimeInterval) duration;
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// delegate is notified of decode results.
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@property (nonatomic, assign) id<ZBarReaderViewDelegate> readerDelegate;
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// access to image scanner for configuration.
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@property (nonatomic, readonly) ZBarImageScanner *scanner;
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// whether to display the tracking annotation for uncertain barcodes
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// (default YES).
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@property (nonatomic) BOOL tracksSymbols;
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// color of the tracking box (default green)
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@property (nonatomic, retain) UIColor *trackingColor;
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// enable pinch gesture recognition for zooming the preview/decode
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// (default YES).
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@property (nonatomic) BOOL allowsPinchZoom;
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// torch mode to set automatically (default Auto).
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@property (nonatomic) NSInteger torchMode;
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// whether to display the frame rate for debug/configuration
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// (default NO).
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@property (nonatomic) BOOL showsFPS;
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// zoom scale factor applied to video preview *and* scanCrop.
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// also updated by pinch-zoom gesture. clipped to range [1,maxZoom],
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// defaults to 1.25
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@property (nonatomic) CGFloat zoom;
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- (void) setZoom: (CGFloat) zoom
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animated: (BOOL) animated;
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// maximum settable zoom factor.
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@property (nonatomic) CGFloat maxZoom;
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// the region of the image that will be scanned. normalized coordinates.
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@property (nonatomic) CGRect scanCrop;
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// additional transform applied to video preview.
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// (NB *not* applied to scan crop)
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@property (nonatomic) CGAffineTransform previewTransform;
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// specify an alternate capture device.
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@property (nonatomic, retain) AVCaptureDevice *device;
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// direct access to the capture session. warranty void if opened...
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@property (nonatomic, readonly) AVCaptureSession *session;
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@property (nonatomic, readonly) ZBarCaptureReader *captureReader;
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// this flag still works, but its use is deprecated
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@property (nonatomic) BOOL enableCache;
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@end
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