// // $Id$ // // GenerateThumbnailForURL.m // sequel-pro // // Created by Hans-Jörg Bibiko on August 4, 2010. // Copyright (c) 2010 Hans-Jörg Bibiko. All rights reserved. // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, // copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following // conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR // OTHER DEALINGS IN THE SOFTWARE. // // More info at #import #import #import void CancelThumbnailGeneration(void* thisInterface, QLThumbnailRequestRef thumbnail); OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maximumSize); /** * Generate a thumbnail for file. * * This function's job is to create thumbnail for designated file as fast as possible. */ void CancelThumbnailGeneration(void* thisInterface, QLThumbnailRequestRef thumbnail) { // Implement only if supported } OSStatus GenerateThumbnailForURL(void *thisInterface, QLThumbnailRequestRef thumbnail, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options, CGSize maximumSize) { return noErr; // The following code is meant as example maybe for the future // NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; // // NSData *thumbnailData = [NSData dataWithContentsOfFile:@"appIcon.icns"]; // if ( thumbnailData == nil || [thumbnailData length] == 0 ) { // // Nothing Found. Don't care. // [pool release]; // return noErr; // } // // NSSize canvasSize = NSMakeSize((NSInteger)(maximumSize.height/1.3f), maximumSize.height); // // // Thumbnail will be drawn with maximum resolution for desired thumbnail request // // Here we create a graphics context to draw the Quick Look Thumbnail in. // CGContextRef cgContext = QLThumbnailRequestCreateContext(thumbnail, *(CGSize *)&canvasSize, true, NULL); // if(cgContext) { // NSGraphicsContext* context = [NSGraphicsContext graphicsContextWithGraphicsPort:(void *)cgContext flipped:YES]; // if(context) { // //These two lines of code are just good safe programming... // [NSGraphicsContext saveGraphicsState]; // [NSGraphicsContext setCurrentContext:context]; // // // [context setCompositingOperation:NSCompositeSourceOver]; // // CGContextSetAlpha(cgContext, 0.5); // // NSBitmapImageRep *thumbnailBitmap = [NSBitmapImageRep imageRepWithData:thumbnailData]; // [thumbnailBitmap drawInRect:NSMakeRect(10,10,200,200)]; // // //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 // QLThumbnailRequestFlushContext(thumbnail, cgContext); // // CFRelease(cgContext); // } // // [pool release]; // return noErr; }