Remove twisted corner from qlgenerator thumbnail

Question

How to remove a rounded icon created by thumbnails in the quick view plugin?

Screenshot of current icon:

Screenshot of what I want:

GeneratePreviewForURL.m:

#include <CoreFoundation/CoreFoundation.h> #include <CoreServices/CoreServices.h> #include <QuickLook/QuickLook.h> #import "GenerateIcon.h" OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options); void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview); /* ----------------------------------------------------------------------------- Generate a preview for file This function job is to create preview for designated file ----------------------------------------------------------------------------- */ OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options) { // To complete your generator please implement the function GeneratePreviewForURL in GeneratePreviewForURL.c [GenerateIcon generatePreviewWithRef:preview URL:url]; return noErr; } void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview) { // Implement only if supported } 

GenerateIcon.m:

 // // GenerateIcon.m // Windows Binary Icon // // Created by Asger Hautop Drewsen on 2/5/12. // Copyright (c) 2012 Asger Drewsen. All rights reserved. // #import "GenerateIcon.h" @implementation GenerateIcon +(void) generateThumbnailWithRef:(QLThumbnailRequestRef)requestRef URL:(CFURLRef)url { [GenerateIcon generateMultiWithThumbnailRef:requestRef PreviewRef:nil URL:url]; } +(void) generatePreviewWithRef:(QLPreviewRequestRef)requestRef URL:(CFURLRef)url { [GenerateIcon generateMultiWithThumbnailRef:nil PreviewRef:requestRef URL:url]; } +(void) generateMultiWithThumbnailRef:(QLThumbnailRequestRef)thumbnail PreviewRef:(QLPreviewRequestRef)preview URL:(CFURLRef)url { @autoreleasepool { NSString * tempDir = NSTemporaryDirectory(); if (tempDir == nil) tempDir = @"/tmp"; NSFileManager *fileManager = [[NSFileManager alloc] init]; NSString *directory = [tempDir stringByAppendingFormat: [NSString stringWithFormat:@"%@-%.0f", @"exe-icons", [NSDate timeIntervalSinceReferenceDate] * 1000.0]]; //NSString *directory = [tempDir stringByAppendingPathComponent:@"com.tyilo.exe-icons"]; /*for (NSString *file in [fileManager contentsOfDirectoryAtPath:directory error:nil]) { [fileManager removeItemAtPath:file error:nil]; }*/ [fileManager createDirectoryAtPath:directory withIntermediateDirectories:YES attributes:nil error:nil]; [[NSTask launchedTaskWithLaunchPath:@"/usr/local/bin/wrestool" arguments:[NSArray arrayWithObjects: @"-t", @"group_icon", @"-o", directory, @"-x", [(__bridge NSURL *)url path], nil]] waitUntilExit]; NSArray *icons = [fileManager contentsOfDirectoryAtPath:directory error:nil]; if (icons.count > 0) { NSImage *image = [[NSImage alloc] initWithContentsOfFile:[directory stringByAppendingPathComponent: [icons objectAtIndex:0]]]; NSData *thumbnailData = [image TIFFRepresentation]; CGSize size = image.size; NSDictionary *properties = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:size.width],kQLPreviewPropertyWidthKey, [NSNumber numberWithInt:size.height],kQLPreviewPropertyHeightKey, nil]; CGContextRef CGContext; if (thumbnail) { CGContext = QLThumbnailRequestCreateContext(thumbnail, size, TRUE, (__bridge CFDictionaryRef)properties); } else { CGContext = QLPreviewRequestCreateContext(preview, size, TRUE, (__bridge CFDictionaryRef)properties); } if(CGContext) { NSGraphicsContext* context = [NSGraphicsContext graphicsContextWithGraphicsPort:(void *)CGContext flipped:size.width > size.height]; if(context) { //These two lines of code are just good safe programming… [NSGraphicsContext saveGraphicsState]; [NSGraphicsContext setCurrentContext:context]; NSBitmapImageRep *thumbnailBitmap = [NSBitmapImageRep imageRepWithData:thumbnailData]; [thumbnailBitmap draw]; //This line sets the context back to what it was when we're done [NSGraphicsContext restoreGraphicsState]; } // When we are done with our drawing code QLThumbnailRequestFlushContext() is called to flush the context if (thumbnail) { QLThumbnailRequestFlushContext(thumbnail, CGContext); } else { QLPreviewRequestFlushContext(preview, CGContext); } // Release the CGContext CFRelease(CGContext); } /*NSLog(@"%@", [directory stringByAppendingPathComponent: [icons objectAtIndex:0]]); CGImageRef image = (__bridge CGImageRef) [[NSImage alloc] initByReferencingFile:[directory stringByAppendingPathComponent: [icons objectAtIndex:0]]]; QLThumbnailRequestSetImage(thumbnail, image, properties);*/ } else { NSLog(@"Failed to generate thumbnail!"); } } } @end 

Edit: Added screenshots.

Answer 1

I'm a little late for this question!

You need to add the undocumented IconFlavor key to the property dictionary that you supply in QLThumbnailRequestCreateContext () or QLThumbnailRequestSetXXX (), and set it to 1 for minimal styling.

See here for an example. At the top of this file are some other values ​​that I found for "IconFlavour".

Answer 2

The aspect of your icons is automatically selected by Quick Look and there is no public way to configure it. What is your type matching tree?

For more information about UTI, see Uniform Type Identifier Identifier . Note that the type matching tree will not necessarily translate to what you want from Quick Look, but at least you will have a reasonable starting point.