+
−/*
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− * Hedgewars-iOS, a Hedgewars port for iOS devices
+
− * Copyright (c) 2009-2011 Vittorio Giovara <vittorio.giovara@gmail.com>
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− *
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− * This program is free software; you can redistribute it and/or modify
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− * it under the terms of the GNU General Public License as published by
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− * the Free Software Foundation; version 2 of the License
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− *
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− * This program is distributed in the hope that it will be useful,
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− * but WITHOUT ANY WARRANTY; without even the implied warranty of
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− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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− * GNU General Public License for more details.
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− *
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− * You should have received a copy of the GNU General Public License
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− * along with this program; if not, write to the Free Software
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− * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
− *
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− * File created on 08/04/2010.
+
− */
+
−
+
−
+
−#import "UIImageExtra.h"
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−
+
−
+
−@implementation UIImage (extra)
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−
+
−CGFloat getScreenScale(void) {
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−    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
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−        return [UIScreen mainScreen].scale;
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−    else
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−        return 1.0f;
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−}
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−
+
−-(UIImage *)scaleToSize:(CGSize) size {
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−    DLog(@"warning - this is a very expensive operation, you should avoid using it");
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−
+
−    // Create a bitmap graphics context; this will also set it as the current context
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−    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
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−        UIGraphicsBeginImageContextWithOptions(size, NO, getScreenScale());
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−    else
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−        UIGraphicsBeginImageContext(size);
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−
+
−    // Draw the scaled image in the current context
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−    [self drawInRect:CGRectMake(0, 0, size.width, size.height)];
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−
+
−    // Create a new image from current context
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−    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
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−
+
−    // Pop the current context from the stack
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−    UIGraphicsEndImageContext();
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−
+
−    // Return our new scaled image (autoreleased)
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−    return scaledImage;
+
−}
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−
+
−-(UIImage *)mergeWith:(UIImage *)secondImage atPoint:(CGPoint) secondImagePoint {
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−    if (secondImage == nil) {
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−        DLog(@"Warning, secondImage == nil");
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−        return self;
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−    }
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−    CGFloat screenScale = getScreenScale();
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−    int w = self.size.width * screenScale;
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−    int h = self.size.height * screenScale;
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−    
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−    if (w == 0 || h == 0) {
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−        DLog(@"Can have 0 dimesions");
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−        return self;
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−    }
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−    
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−    // Create a bitmap graphics context; this will also set it as the current context
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−    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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−    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
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−    
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−    // draw the two images in the current context
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−    CGContextDrawImage(context, CGRectMake(0, 0, self.size.width*screenScale, self.size.height*screenScale), [self CGImage]);
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−    CGContextDrawImage(context, CGRectMake(secondImagePoint.x*screenScale, secondImagePoint.y*screenScale, secondImage.size.width*screenScale, secondImage.size.height*screenScale), [secondImage CGImage]);
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−    
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−    // Create bitmap image info from pixel data in current context
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−    CGImageRef imageRef = CGBitmapContextCreateImage(context);
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−    
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−    // Create a new UIImage object
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−    UIImage *resultImage;
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−    if ([self respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
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−        resultImage = [UIImage imageWithCGImage:imageRef scale:screenScale orientation:UIImageOrientationUp];
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−    else
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−        resultImage = [UIImage imageWithCGImage:imageRef];
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−
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−    // Release colorspace, context and bitmap information
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−    CGColorSpaceRelease(colorSpace);
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−    CGContextRelease(context);
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−    CFRelease(imageRef);
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−   
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−    return resultImage;
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−}
+
−
+
−-(id) initWithContentsOfFile:(NSString *)path andCutAt:(CGRect) rect {
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−    // load image from path
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−    UIImage *image = [[UIImage alloc] initWithContentsOfFile: path];
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−
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−    if (nil != image) {
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−        // get its CGImage representation with a give size
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−        CGImageRef cgImage = CGImageCreateWithImageInRect([image CGImage], rect);
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−
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−        // clean memory
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−        [image release];
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−
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−        // create a UIImage from the CGImage (memory must be allocated already)
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−        UIImage *sprite = [self initWithCGImage:cgImage];
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−
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−        // clean memory
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−        CGImageRelease(cgImage);
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−
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−        // return resulting image
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−        return sprite;
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−    } else {
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−        DLog(@"error - image == nil");
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−        return nil;
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−    }
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−}
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−
+
−-(UIImage *)cutAt:(CGRect) rect {
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−    CGImageRef cgImage = CGImageCreateWithImageInRect([self CGImage], rect);
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−
+
−    UIImage *res = [UIImage imageWithCGImage:cgImage];
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−    CGImageRelease(cgImage);
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−
+
−    return res;
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−}
+
−
+
−-(UIImage *)convertToGrayScale {
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−    // Create image rectangle with current image width/height
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−    CGRect imageRect = CGRectMake(0, 0, self.size.width, self.size.height);
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−
+
−    // Grayscale color space
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−    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
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−
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−    // Create bitmap content with current image size and grayscale colorspace
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−    CGContextRef context = CGBitmapContextCreate(nil, self.size.width, self.size.height, 8, 0, colorSpace, kCGImageAlphaNone);
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−
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−    // Draw image into current context, with specified rectangle
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−    // using previously defined context (with grayscale colorspace)
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−    CGContextDrawImage(context, imageRect, [self CGImage]);
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−
+
−    // Create bitmap image info from pixel data in current context
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−    CGImageRef imageRef = CGBitmapContextCreateImage(context);
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−
+
−    // Create a new UIImage object
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−    UIImage *newImage = [UIImage imageWithCGImage:imageRef];
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−
+
−    // Release colorspace, context and bitmap information
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−    CFRelease(imageRef);
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−    CGContextRelease(context);
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−    CGColorSpaceRelease(colorSpace);
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−
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−    // Return the new grayscale image
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−    return newImage;
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−}
+
−
+
−// by http://iphonedevelopertips.com/cocoa/how-to-mask-an-image.html turned into a category by koda
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−-(UIImage*) maskImageWith:(UIImage *)maskImage {
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−    // prepare the reference image
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−    CGImageRef maskRef = [maskImage CGImage];
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−
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−    // create the mask using parameters of the mask reference
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−    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
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−                                        CGImageGetHeight(maskRef),
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−                                        CGImageGetBitsPerComponent(maskRef),
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−                                        CGImageGetBitsPerPixel(maskRef),
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−                                        CGImageGetBytesPerRow(maskRef),
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−                                        CGImageGetDataProvider(maskRef), NULL, false);
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−
+
−    // create an image in the current context
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−    CGImageRef masked = CGImageCreateWithMask([self CGImage], mask);
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−    CGImageRelease(mask);
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−
+
−    UIImage* retImage = [UIImage imageWithCGImage:masked];
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−    CGImageRelease(masked);
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−
+
−    return retImage;
+
−}
+
−
+
−// by http://blog.sallarp.com/iphone-uiimage-round-corners/ turned into a category by koda
+
−void addRoundedRectToPath(CGContextRef context, CGRect rect, CGFloat ovalWidth, CGFloat ovalHeight) {
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−    CGFloat fw, fh;
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−    if (ovalWidth == 0 || ovalHeight == 0) {
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−        CGContextAddRect(context, rect);
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−        return;
+
−    }
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−    CGContextSaveGState(context);
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−    CGContextTranslateCTM (context, CGRectGetMinX(rect), CGRectGetMinY(rect));
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−    CGContextScaleCTM (context, ovalWidth, ovalHeight);
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−    fw = CGRectGetWidth (rect) / ovalWidth;
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−    fh = CGRectGetHeight (rect) / ovalHeight;
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−    CGContextMoveToPoint(context, fw, fh/2);
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−    CGContextAddArcToPoint(context, fw, fh, fw/2, fh, 1);
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−    CGContextAddArcToPoint(context, 0, fh, 0, fh/2, 1);
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−    CGContextAddArcToPoint(context, 0, 0, fw/2, 0, 1);
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−    CGContextAddArcToPoint(context, fw, 0, fw, fh/2, 1);
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−    CGContextClosePath(context);
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−    CGContextRestoreGState(context);
+
−}
+
−
+
−-(UIImage *)makeRoundCornersOfSize:(CGSize) sizewh {
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−    CGFloat cornerWidth = sizewh.width;
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−    CGFloat cornerHeight = sizewh.height;
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−    CGFloat screenScale = getScreenScale();
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−    CGFloat w = self.size.width * screenScale;
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−    CGFloat h = self.size.height * screenScale;
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−
+
−    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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−    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
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−
+
−    CGContextBeginPath(context);
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−    CGRect rect = CGRectMake(0, 0, w, h);
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−    addRoundedRectToPath(context, rect, cornerWidth, cornerHeight);
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−    CGContextClosePath(context);
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−    CGContextClip(context);
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−
+
−    CGContextDrawImage(context, CGRectMake(0, 0, w, h), [self CGImage]);
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−
+
−    CGImageRef imageMasked = CGBitmapContextCreateImage(context);
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−    CGContextRelease(context);
+
−    CGColorSpaceRelease(colorSpace);
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−
+
−    UIImage *newImage;
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−    if ([self respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
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−        newImage = [UIImage imageWithCGImage:imageMasked scale:screenScale orientation:UIImageOrientationUp];
+
−    else
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−        newImage = [UIImage imageWithCGImage:imageMasked];
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−
+
−    CGImageRelease(imageMasked);
+
−
+
−    return newImage;
+
−}
+
−
+
−// by http://www.sixtemia.com/journal/2010/06/23/uiimage-negative-color-effect/
+
−-(UIImage *)convertToNegative {
+
−    UIGraphicsBeginImageContext(self.size);
+
−    CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);
+
−    [self drawInRect:CGRectMake(0, 0, self.size.width, self.size.height)];
+
−    CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeDifference);
+
−    CGContextSetFillColorWithColor(UIGraphicsGetCurrentContext(),[UIColor whiteColor].CGColor);
+
−    CGContextFillRect(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, self.size.width, self.size.height));
+
−    // create an image from the current contex (not thread safe)
+
−    UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
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−    UIGraphicsEndImageContext();
+
−    return result;
+
−}
+
−
+
−+(UIImage *)whiteImage:(CGSize) ofSize {
+
−    CGFloat w = ofSize.width;
+
−    CGFloat h = ofSize.height;
+
−    DLog(@"w: %f, h: %f", w, h);
+
−
+
−    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+
−    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
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−
+
−    CGContextBeginPath(context);
+
−    CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0);
+
−    CGContextFillRect(context,CGRectMake(0,0,ofSize.width,ofSize.height));
+
−
+
−    CGImageRef image = CGBitmapContextCreateImage(context);
+
−    CGContextRelease(context);
+
−    CGColorSpaceRelease(colorSpace);
+
−
+
−    UIImage *bkgImg = [UIImage imageWithCGImage:image];
+
−    CGImageRelease(image);
+
−    return bkgImg;
+
−}
+
−
+
−@end