jens@0: //
jens@0: //  GraphicsUtils.m
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import "GraphicsUtils.h"
jens@0: 
jens@0: 
jens@0: @implementation NSImage (MYUtilities)
jens@0: 
jens@0: 
jens@0: - (NSSize) my_sizeOfLargestRep
jens@0: {
jens@0:     NSArray *reps = [self representations];
jens@0:     NSSize max = {0,0};
jens@0:     int i;
jens@0:     for( i=[reps count]-1; i>=0; i-- ) {
jens@0:         NSImageRep *rep = [reps objectAtIndex: i];
jens@0:         NSSize size = [rep size];
jens@0:         if( size.width > max.width || size.height > max.height ) {
jens@0:             max = size;
jens@0:         }
jens@0:     }
jens@0:     return max;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (NSImage*) my_shrunkToFitIn: (NSSize) maxSize
jens@0: {
jens@0:     NSSize size = self.size;
jens@0:     float scale = MIN( size.width/maxSize.width, size.height/maxSize.height );
jens@0:     if( scale >= 1.0 )
jens@0:         return self;
jens@0:     
jens@0:     NSSize newSize = {roundf(size.width*scale), roundf(size.height*scale)};
jens@0:     NSImage *newImage = [[NSImage alloc] initWithSize: newSize];
jens@0:     [newImage lockFocus];
jens@0:     NSGraphicsContext *context = [NSGraphicsContext currentContext];
jens@0:     [context saveGraphicsState];
jens@0:     [context setImageInterpolation: NSImageInterpolationHigh];
jens@0:     [self drawInRect: NSMakeRect(0,0,newSize.width,newSize.height)
jens@0:             fromRect: NSMakeRect(0,0,size.width,size.height)
jens@0:            operation: NSCompositeCopy fraction: 1.0f];
jens@0:     [context restoreGraphicsState];
jens@0:     [newImage unlockFocus];
jens@0:     return [newImage autorelease];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (NSData*) my_JPEGData
jens@0: {
jens@0:     NSImage *tiffImage = [[NSImage alloc] initWithData:[self TIFFRepresentation]];
jens@0:     NSBitmapImageRep *rep = [[tiffImage representations] objectAtIndex:0];
jens@0:     NSDictionary *props = [NSDictionary dictionaryWithObjectsAndKeys:
jens@0:         [NSNumber numberWithFloat: 0.75f], NSImageCompressionFactor, nil];
jens@0:     NSData *jpeg = [rep representationUsingType: NSJPEGFileType properties: props];
jens@0:     [tiffImage release];
jens@0:     return jpeg;
jens@0: }
jens@0: 
jens@0: 
jens@0: #if 0
jens@0: 
jens@0: // Adapted from Apple's CocoaCreateMovie sample
jens@0: // <http://developer.apple.com/samplecode/Sample_Code/QuickTime/Basics/CocoaCreateMovie/MyController.m.htm>
jens@0: static void CopyNSImageRepToGWorld(NSBitmapImageRep *imageRepresentation, GWorldPtr gWorldPtr)
jens@0: {
jens@0:     PixMapHandle  pixMapHandle;
jens@0:     unsigned char*   pixBaseAddr;
jens@0: 
jens@0:     // Lock the pixels
jens@0:     pixMapHandle = GetGWorldPixMap(gWorldPtr);
jens@0:     LockPixels (pixMapHandle);
jens@0:     pixBaseAddr = (unsigned char*) GetPixBaseAddr(pixMapHandle);
jens@0: 
jens@0:     const unsigned char* bitMapDataPtr = [imageRepresentation bitmapData];
jens@0: 
jens@0:     if ((bitMapDataPtr != nil) && (pixBaseAddr != nil))
jens@0:     {
jens@0:         int i,j;
jens@0:         int pixmapRowBytes = GetPixRowBytes(pixMapHandle);
jens@0:         NSSize imageSize = [imageRepresentation size];
jens@0:         for (i=0; i< imageSize.height; i++)
jens@0:         {
jens@0:             const unsigned char *src = bitMapDataPtr + i * [imageRepresentation bytesPerRow];
jens@0:             unsigned char *dst = pixBaseAddr + i * pixmapRowBytes;
jens@0:             for (j = 0; j < imageSize.width; j++)
jens@0:             {
jens@0:                 *dst++ = 0;  // X - our src is 24-bit only
jens@0:                 *dst++ = *src++; // Red component
jens@0:                 *dst++ = *src++; // Green component
jens@0:                 *dst++ = *src++; // Blue component
jens@0:             }
jens@0:         }
jens@0:     }
jens@0:     UnlockPixels(pixMapHandle);
jens@0: }
jens@0: 
jens@0: 
jens@0: - (NSData*) my_PICTData
jens@0: {
jens@0:     // Locate the bitmap image rep:
jens@0:     NSBitmapImageRep *rep;
jens@0:     NSEnumerator *e = [[self representations] objectEnumerator];
jens@0:     while( (rep=[e nextObject]) != nil ) {
jens@0:         if( [rep isKindOfClass: [NSBitmapImageRep class]] )
jens@0:             break;
jens@0:     }
jens@0:     if( ! rep ) {
jens@0:         Warn(@"No bitmap image rep in image");
jens@0:         return nil;
jens@0:     }
jens@0: 
jens@0:     // Copy the image data into a GWorld:
jens@0:     Rect bounds;
jens@0:     SetRect(&bounds, 0,0,[rep pixelsWide],[rep pixelsHigh]);    
jens@0:     GWorldPtr gworld;
jens@0:     OSStatus err = NewGWorld(&gworld, 32, &bounds, NULL, NULL, 0);
jens@0:     if( err ) {
jens@0:         Warn(@"NewGWorld failed with err %i",err);
jens@0:         return nil;
jens@0:     }
jens@0:     CopyNSImageRepToGWorld(rep,gworld);
jens@0: 
jens@0:     // Draw the GWorld into a PicHandle:
jens@0:     CGrafPtr oldPort;
jens@0:     GDHandle oldDevice;
jens@0:     GetGWorld(&oldPort,&oldDevice);
jens@0:     SetGWorld(gworld,NULL);
jens@0:     ClipRect(&bounds);
jens@0:     PicHandle pic = OpenPicture(&bounds);
jens@0:     CopyBits(GetPortBitMapForCopyBits(gworld),
jens@0:              GetPortBitMapForCopyBits(gworld),
jens@0:              &bounds,&bounds,srcCopy,NULL);
jens@0:     ClosePicture();
jens@0:     err = QDError();
jens@0:     SetGWorld(oldPort,oldDevice);
jens@0:     DisposeGWorld(gworld);
jens@0:     
jens@0:     if( err ) {
jens@0:         Warn(@"Couldn't convert to PICT: error %i",err);
jens@0:         return nil;
jens@0:     }
jens@0: 
jens@0:     // Copy the PicHandle into an NSData:
jens@0:     HLock((Handle)pic);
jens@0:     //Test to put PICT on clipboard:
jens@0:     /*ScrapRef scrap;
jens@0:     GetCurrentScrap(&scrap);
jens@0:     ClearScrap(&scrap);
jens@0:     PutScrapFlavor(scrap,'PICT',0,GetHandleSize((Handle)pic),*pic);*/
jens@0:     NSData *data = [NSData dataWithBytes: *pic length: GetHandleSize((Handle)pic)];
jens@0:     DisposeHandle((Handle)pic);
jens@0:     Log(@"Converted image to %i bytes of PICT data",[data length]);
jens@0:     return data;
jens@0: }
jens@0: #endif
jens@0: 
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: @implementation NSBezierPath (MYUtilities)
jens@0: 
jens@0: + (NSBezierPath*) my_bezierPathWithRoundRect: (NSRect)rect radius: (float)radius
jens@0: {
jens@0:     radius = MIN(radius, floorf(rect.size.width/2));
jens@0:     float x0 = NSMinX(rect), y0 = NSMinY(rect),
jens@0:           x1 = NSMaxX(rect), y1 = NSMaxY(rect);
jens@0:     NSBezierPath *path = [NSBezierPath bezierPath];
jens@0:     
jens@0:     [path moveToPoint: NSMakePoint(x0+radius,y0)];
jens@0:     
jens@0:     [path appendBezierPathWithArcFromPoint: NSMakePoint(x1,y0)
jens@0:                                    toPoint: NSMakePoint(x1,y1) radius: radius];
jens@0:     [path appendBezierPathWithArcFromPoint: NSMakePoint(x1,y1)
jens@0:                                    toPoint: NSMakePoint(x0,y1) radius: radius];
jens@0:     [path appendBezierPathWithArcFromPoint: NSMakePoint(x0,y1)
jens@0:                                    toPoint: NSMakePoint(x0,y0) radius: radius];
jens@0:     [path appendBezierPathWithArcFromPoint: NSMakePoint(x0,y0)
jens@0:                                    toPoint: NSMakePoint(x1,y0) radius: radius];
jens@0:     [path closePath];
jens@0:     return path;
jens@0: }
jens@0: 
jens@0: @end