/* ============================================================================= PROJECT: Filie FILE: NSImage+NiceScaling.h COPYRIGHT: (c) 2003 by M. Uli Kusterer, all rights reserved. AUTHORS: M. Uli Kusterer - UK LICENSES: GNU GPL, Modified BSD REVISIONS: 2003-12-19 UK Created. ========================================================================== */ // ----------------------------------------------------------------------------- // Headers: // ----------------------------------------------------------------------------- #import "NSImage+NiceScaling.h" @implementation NSImage (NiceScaling) -(NSImage*) scaledImageToFitSize: (NSSize)fitIn { return [self scaledImageToFitSize: fitIn withInterpolation: NSImageInterpolationHigh]; } -(NSImage*) scaledImageToFitSize: (NSSize)fitIn withInterpolation: (NSImageInterpolation)inter { return [self scaledImageToFitSize: fitIn withInterpolation: inter andBox: NO]; } -(NSImage*) scaledImageToFitSize: (NSSize)fitIn withInterpolation: (NSImageInterpolation)inter andBox: (BOOL)doBox { NSSize size = [self scaledSizeToFitSize: fitIn]; NSImage* img = [[[NSImage alloc] initWithSize: fitIn] autorelease]; NSRect srcBox = { { 0, 0 }, { 0, 0 } }, dstBox = { { 0, 0 }, { 0, 0 } }; dstBox.size = size; srcBox.size = [self size]; dstBox.origin.x += (fitIn.width -size.width) /2; dstBox.origin.y += (fitIn.height -size.height) /2; NS_DURING [img lockFocus]; if( doBox ) { [[NSColor whiteColor] set]; [NSBezierPath fillRect: dstBox]; [[NSColor blackColor] set]; } [[NSGraphicsContext currentContext] setImageInterpolation: inter]; [self drawInRect: dstBox fromRect: srcBox operation:NSCompositeSourceOver fraction:1.0]; if( doBox ) [NSBezierPath strokeRect: dstBox]; [img unlockFocus]; NS_VALUERETURN( img, NSImage* ); NS_HANDLER NSLog(@"Couldn't scale image %@",localException); NS_ENDHANDLER return nil; } -(NSImage*) scaledImageToCoverSize: (NSSize)fitIn { return [self scaledImageToCoverSize: fitIn withInterpolation: NSImageInterpolationHigh]; } -(NSImage*) scaledImageToCoverSize: (NSSize)fitIn withInterpolation: (NSImageInterpolation)inter { return [self scaledImageToCoverSize: fitIn withInterpolation: inter andBox: NO]; } -(NSImage*) scaledImageToCoverSize: (NSSize)fitIn withInterpolation: (NSImageInterpolation)inter andBox: (BOOL)doBox { return [self scaledImageToCoverSize: fitIn withInterpolation: inter andBox: doBox align: NSImageAlignCenter]; } -(NSImage*) scaledImageToCoverSize: (NSSize)fitIn withInterpolation: (NSImageInterpolation)inter andBox: (BOOL)doBox align: (NSImageAlignment)align { NSSize size = [self scaledSizeToCoverSize: fitIn]; NSImage* img = [[[NSImage alloc] initWithSize: fitIn] autorelease]; NSRect srcBox = { { 0, 0 }, { 0, 0 } }, dstBox = { { 0, 0 }, { 0, 0 } }, clipBox = { { 0, 0 }, { 0, 0 } }; dstBox.size = size; srcBox.size = [self size]; clipBox.size = fitIn; // Center it: switch( align ) { case NSImageAlignCenter: // Center h and v. dstBox.origin.x -= (dstBox.size.width - clipBox.size.width) /2; dstBox.origin.y -= (dstBox.size.height - clipBox.size.height) /2; break; case NSImageAlignTop: // Center h, v at top. dstBox.origin.x -= (dstBox.size.width - clipBox.size.width) /2; dstBox.origin.y -= dstBox.size.height - clipBox.size.height; break; case NSImageAlignTopLeft: // h at left, v at top. dstBox.origin.y -= dstBox.size.height - clipBox.size.height; break; case NSImageAlignLeft: // h at left, center v. dstBox.origin.y -= (dstBox.size.height - clipBox.size.height) /2; break; case NSImageAlignBottomLeft: // h at left, v at bottom default: break; case NSImageAlignBottom: // center h, v at bottom. dstBox.origin.x -= (dstBox.size.width - clipBox.size.width) /2; break; case NSImageAlignBottomRight: // h at right, v at bottom. dstBox.origin.x -= dstBox.size.width - clipBox.size.width; break; case NSImageAlignRight: // h at right, center v. dstBox.origin.x -= dstBox.size.width - clipBox.size.width; dstBox.origin.y -= (dstBox.size.height - clipBox.size.height) /2; break; case NSImageAlignTopRight: // h at right, v at top. dstBox.origin.y -= dstBox.size.height - clipBox.size.height; dstBox.origin.x -= dstBox.size.width - clipBox.size.width; break; } NS_DURING [img lockFocus]; [NSBezierPath clipRect: clipBox]; [[NSGraphicsContext currentContext] setImageInterpolation: inter]; [self drawInRect: dstBox fromRect: srcBox operation:NSCompositeSourceOver fraction:1.0]; if( doBox ) { [[NSColor blackColor] set]; [NSBezierPath strokeRect: clipBox]; } [img unlockFocus]; NS_VALUERETURN( img, NSImage* ); NS_HANDLER NSLog(@"Couldn't scale image %@",localException); NS_ENDHANDLER return nil; } -(NSSize) scaledSizeToFitSize: (NSSize)size { return [[self class] scaledSize: [self size] toFitSize: size]; } +(NSSize) scaledSize: (NSSize)imgSize toFitSize: (NSSize)size { NSSize finalSize = imgSize; float ratio = imgSize.height / imgSize.width; //if( imgSize.width > size.width || imgSize.height > size.height ) { finalSize.width = size.width; if( imgSize.height == imgSize.width ) finalSize.height = finalSize.width; else finalSize.height = size.height * ratio; if( finalSize.height > size.height ) { ratio = imgSize.width / imgSize.height; finalSize.height = size.height; if( imgSize.height == imgSize.width ) finalSize.width = finalSize.height; else finalSize.width = size.width * ratio; } } return( finalSize ); } -(NSSize) scaledSizeToCoverSize: (NSSize)size { return [[self class] scaledSize: [self size] toCoverSize: size]; } +(NSSize) scaledSize: (NSSize)imgSize toCoverSize: (NSSize)size { NSSize finalSize = imgSize; float ratio = imgSize.height / imgSize.width; /*if( imgSize.width == size.width && imgSize.height == size.height ) return imgSize;*/ finalSize.width = size.width; finalSize.height = finalSize.width * ratio; if( finalSize.height < size.height ) { ratio = imgSize.width / imgSize.height; finalSize.height = size.height; finalSize.width = finalSize.height * ratio; } return( finalSize ); } @end |