101 lines
3.4 KiB
Objective-C
101 lines
3.4 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 withOverlayText:@"SIP002"];
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}
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- (void)setQRCode:(NSString*) qrCode withOverlayText: (NSString*) text {
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NSImage *image = [self createQRImageForString:qrCode size:NSMakeSize(250, 250)];
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if (text) {
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// Draw overlay text
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NSDictionary* attrs = @{
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NSForegroundColorAttributeName: [NSColor colorWithRed:28/255.0 green:155/255.0 blue:71/255.0 alpha:1],
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NSBackgroundColorAttributeName: [NSColor whiteColor],
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NSFontAttributeName: [NSFont fontWithName:@"Helvetica" size:(CGFloat)16],
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};
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NSMutableAttributedString* attrsText = [[NSMutableAttributedString alloc] initWithString: text
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attributes: attrs];
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[image lockFocus];
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[attrsText drawAtPoint: NSMakePoint(100, 5)];
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[image unlockFocus];
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}
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self.imageView.image = image;
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}
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- (NSImage*)createQRImageForString:(NSString *)string size:(NSSize)size {
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NSImage *outputImage = [[NSImage alloc]initWithSize:size];
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[outputImage lockFocus];
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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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/*
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L: 7%
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M: 15%
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Q: 25%
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H: 30%
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*/
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[filter setValue:@"Q" forKey:@"inputCorrectionLevel"];
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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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CGImageRef bitmapImage = [NSGraphicsContext.currentContext.CIContext createCGImage:image fromRect:extent];
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CGContextRef graphicsContext = NSGraphicsContext.currentContext.CGContext;
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CGContextSetInterpolationQuality(graphicsContext, kCGInterpolationNone);
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CGContextScaleCTM(graphicsContext, scale, scale);
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CGContextDrawImage(graphicsContext, extent, bitmapImage);
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// Cleanup
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CGImageRelease(bitmapImage);
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[outputImage unlockFocus];
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return outputImage;
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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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- (void)flagsChanged:(NSEvent *)event {
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NSUInteger modifiers = event.modifierFlags & NSDeviceIndependentModifierFlagsMask;
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if (modifiers & NSAlternateKeyMask) {
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[self setQRCode:self.legacyQRCode withOverlayText:@"Legacy"];
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} else {
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[self setQRCode:self.qrCode withOverlayText:@"SIP002"];
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}
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}
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@end
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