82 lines
2.7 KiB
Objective-C
82 lines
2.7 KiB
Objective-C
//
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// QRCodeWindowController.m
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// shadowsocks
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//
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// Created by clowwindy on 10/12/14.
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// Copyright (c) 2014 clowwindy. All rights reserved.
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//
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#import "SWBQRCodeWindowController.h"
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@import CoreImage;
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@interface SWBQRCodeWindowController ()
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@end
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@implementation SWBQRCodeWindowController
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- (void)windowDidLoad {
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[super windowDidLoad];
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// Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
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[self setQRCode:self.qrCode];
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}
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- (void)setQRCode:(NSString*) qrCode {
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CGImageRef cgImgRef = [self createQRImageForString:qrCode size:CGSizeMake(250, 250)];
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NSImage *image = [[NSImage alloc]initWithCGImage:cgImgRef size:CGSizeMake(250, 250)];
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self.imageView.image = image;
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}
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- (CGImageRef)createQRImageForString:(NSString *)string size:(CGSize)size {
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// Setup the QR filter with our string
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CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
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[filter setDefaults];
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NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
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[filter setValue:data forKey:@"inputMessage"];
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CIImage *image = [filter valueForKey:@"outputImage"];
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// Calculate the size of the generated image and the scale for the desired image size
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CGRect extent = CGRectIntegral(image.extent);
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CGFloat scale = MIN(size.width / CGRectGetWidth(extent), size.height / CGRectGetHeight(extent));
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// Since CoreImage nicely interpolates, we need to create a bitmap image that we'll draw into
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// a bitmap context at the desired size;
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size_t width = CGRectGetWidth(extent) * scale;
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size_t height = CGRectGetHeight(extent) * scale;
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CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
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CGContextRef bitmapRef = CGBitmapContextCreate(nil, width, height, 8, 0, cs, (CGBitmapInfo)kCGImageAlphaNone);
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#if TARGET_OS_IPHONE
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CIContext *context = [CIContext contextWithOptions:nil];
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#else
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CIContext *context = [CIContext contextWithCGContext:bitmapRef options:nil];
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#endif
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CGImageRef bitmapImage = [context createCGImage:image fromRect:extent];
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CGContextSetInterpolationQuality(bitmapRef, kCGInterpolationNone);
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CGContextScaleCTM(bitmapRef, scale, scale);
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CGContextDrawImage(bitmapRef, extent, bitmapImage);
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// Create an image with the contents of our bitmap
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CGImageRef scaledImage = CGBitmapContextCreateImage(bitmapRef);
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// Cleanup
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CGContextRelease(bitmapRef);
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CGImageRelease(bitmapImage);
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return scaledImage;
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}
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- (IBAction) copyQRCode: (id) sender{
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NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
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[pasteboard clearContents];
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NSArray *copiedObjects = [NSArray arrayWithObject: self.imageView.image];
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[pasteboard writeObjects:copiedObjects];
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}
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@end
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