//

//  GraphicsUtils.m

//  MYUtilities

//

//  Copyright 2008 Jens Alfke. All rights reserved.

//

#import "GraphicsUtils.h"

@implementation NSImage (MYUtilities)

- (NSSize) my_sizeOfLargestRep

{

    NSArray *reps = [self representations];

    NSSize max = {0,0};

    int i;

    for( i=[reps count]-1; i>=0; i-- ) {

        NSImageRep *rep = [reps objectAtIndex: i];

        NSSize size = [rep size];

        if( size.width > max.width || size.height > max.height ) {

            max = size;

        }

    }

    return max;

}

- (NSImage*) my_shrunkToFitIn: (NSSize) maxSize

{

    NSSize size = self.size;

    float scale = MIN( size.width/maxSize.width, size.height/maxSize.height );

    if( scale >= 1.0 )

        return self;

    NSSize newSize = {roundf(size.width*scale), roundf(size.height*scale)};

    NSImage *newImage = [[NSImage alloc] initWithSize: newSize];

    [newImage lockFocus];

    NSGraphicsContext *context = [NSGraphicsContext currentContext];

    [context saveGraphicsState];

    [context setImageInterpolation: NSImageInterpolationHigh];

    [self drawInRect: NSMakeRect(0,0,newSize.width,newSize.height)

            fromRect: NSMakeRect(0,0,size.width,size.height)

           operation: NSCompositeCopy fraction: 1.0f];

    [context restoreGraphicsState];

    [newImage unlockFocus];

    return [newImage autorelease];

}

- (NSData*) my_JPEGData

{

    NSImage *tiffImage = [[NSImage alloc] initWithData:[self TIFFRepresentation]];

    NSBitmapImageRep *rep = [[tiffImage representations] objectAtIndex:0];

    NSDictionary *props = [NSDictionary dictionaryWithObjectsAndKeys:

        [NSNumber numberWithFloat: 0.75f], NSImageCompressionFactor, nil];

    NSData *jpeg = [rep representationUsingType: NSJPEGFileType properties: props];

    [tiffImage release];

    return jpeg;

}

#if 0

// Adapted from Apple's CocoaCreateMovie sample

// <http://developer.apple.com/samplecode/Sample_Code/QuickTime/Basics/CocoaCreateMovie/MyController.m.htm>

static void CopyNSImageRepToGWorld(NSBitmapImageRep *imageRepresentation, GWorldPtr gWorldPtr)

{

    PixMapHandle  pixMapHandle;

    unsigned char*   pixBaseAddr;

    // Lock the pixels

    pixMapHandle = GetGWorldPixMap(gWorldPtr);

    LockPixels (pixMapHandle);

    pixBaseAddr = (unsigned char*) GetPixBaseAddr(pixMapHandle);

    const unsigned char* bitMapDataPtr = [imageRepresentation bitmapData];

    if ((bitMapDataPtr != nil) && (pixBaseAddr != nil))

    {

        int i,j;

        int pixmapRowBytes = GetPixRowBytes(pixMapHandle);

        NSSize imageSize = [imageRepresentation size];

        for (i=0; i< imageSize.height; i++)

        {

            const unsigned char *src = bitMapDataPtr + i * [imageRepresentation bytesPerRow];

            unsigned char *dst = pixBaseAddr + i * pixmapRowBytes;

            for (j = 0; j < imageSize.width; j++)

            {

                *dst++ = 0;  // X - our src is 24-bit only

                *dst++ = *src++; // Red component

                *dst++ = *src++; // Green component

                *dst++ = *src++; // Blue component

            }

        }

    }

    UnlockPixels(pixMapHandle);

}

- (NSData*) my_PICTData

{

    // Locate the bitmap image rep:

    NSBitmapImageRep *rep;

    NSEnumerator *e = [[self representations] objectEnumerator];

    while( (rep=[e nextObject]) != nil ) {

        if( [rep isKindOfClass: [NSBitmapImageRep class]] )

            break;

    }

    if( ! rep ) {

        Warn(@"No bitmap image rep in image");

        return nil;

    }

    // Copy the image data into a GWorld:

    Rect bounds;

    SetRect(&bounds, 0,0,[rep pixelsWide],[rep pixelsHigh]);    

    GWorldPtr gworld;

    OSStatus err = NewGWorld(&gworld, 32, &bounds, NULL, NULL, 0);

    if( err ) {

        Warn(@"NewGWorld failed with err %i",err);

        return nil;

    }

    CopyNSImageRepToGWorld(rep,gworld);

    // Draw the GWorld into a PicHandle:

    CGrafPtr oldPort;

    GDHandle oldDevice;

    GetGWorld(&oldPort,&oldDevice);

    SetGWorld(gworld,NULL);

    ClipRect(&bounds);

    PicHandle pic = OpenPicture(&bounds);

    CopyBits(GetPortBitMapForCopyBits(gworld),

             GetPortBitMapForCopyBits(gworld),

             &bounds,&bounds,srcCopy,NULL);

    ClosePicture();

    err = QDError();

    SetGWorld(oldPort,oldDevice);

    DisposeGWorld(gworld);

    if( err ) {

        Warn(@"Couldn't convert to PICT: error %i",err);

        return nil;

    }

    // Copy the PicHandle into an NSData:

    HLock((Handle)pic);

    //Test to put PICT on clipboard:

    /*ScrapRef scrap;

    GetCurrentScrap(&scrap);

    ClearScrap(&scrap);

    PutScrapFlavor(scrap,'PICT',0,GetHandleSize((Handle)pic),*pic);*/

    NSData *data = [NSData dataWithBytes: *pic length: GetHandleSize((Handle)pic)];

    DisposeHandle((Handle)pic);

    Log(@"Converted image to %i bytes of PICT data",[data length]);

    return data;

}

#endif

@end

@implementation NSBezierPath (MYUtilities)

+ (NSBezierPath*) my_bezierPathWithRoundRect: (NSRect)rect radius: (float)radius

{

    radius = MIN(radius, floorf(rect.size.width/2));

    float x0 = NSMinX(rect), y0 = NSMinY(rect),

          x1 = NSMaxX(rect), y1 = NSMaxY(rect);

    NSBezierPath *path = [NSBezierPath bezierPath];

    [path moveToPoint: NSMakePoint(x0+radius,y0)];

    [path appendBezierPathWithArcFromPoint: NSMakePoint(x1,y0)

                                   toPoint: NSMakePoint(x1,y1) radius: radius];

    [path appendBezierPathWithArcFromPoint: NSMakePoint(x1,y1)

                                   toPoint: NSMakePoint(x0,y1) radius: radius];

    [path appendBezierPathWithArcFromPoint: NSMakePoint(x0,y1)

                                   toPoint: NSMakePoint(x0,y0) radius: radius];

    [path appendBezierPathWithArcFromPoint: NSMakePoint(x0,y0)

                                   toPoint: NSMakePoint(x1,y0) radius: radius];

    [path closePath];

    return path;

}

@end