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@2x image support #2

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@2x image support #2

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40 changes: 24 additions & 16 deletions SWNinePatchImageFactorySample/SWNinePatchImageFactory/SWNinePatchImageFactory.m
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
// Copyright (c) 2014 TaccoTap. All rights reserved.

#import "SWNinePatchImageFactory.h"
#import <math.h>

@interface SWNinePatchImageFactory (Private)
+ (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)xx andY:(int)yy count:(int)count;
Expand All @@ -17,7 +18,7 @@ @implementation SWNinePatchImageFactory
+ (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)xx andY:(int)yy count:(int)count
{
NSMutableArray* result = [NSMutableArray arrayWithCapacity:count];

// First get the image into your data buffer
CGImageRef imageRef = [image CGImage];
NSUInteger width = CGImageGetWidth(imageRef);
Expand All @@ -31,10 +32,10 @@ + (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)xx andY:(int)yy count:(in
bitsPerComponent, bytesPerRow, colorSpace,
kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);

CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef);
CGContextRelease(context);

// Now your rawData contains the image data in the RGBA8888 pixel format.
int byteIndex = (bytesPerRow * yy) + xx * bytesPerPixel;
for (int ii = 0; ii < count; ++ii) {
Expand All @@ -43,25 +44,25 @@ + (NSArray*)getRGBAsFromImage:(UIImage*)image atX:(int)xx andY:(int)yy count:(in
CGFloat blue = (rawData[byteIndex + 2] * 1.0) / 255.0;
CGFloat alpha = (rawData[byteIndex + 3] * 1.0) / 255.0;
byteIndex += 4;

NSArray* aColor = [NSArray arrayWithObjects:[NSNumber numberWithFloat:red], [NSNumber numberWithFloat:green], [NSNumber numberWithFloat:blue], [NSNumber numberWithFloat:alpha], nil];
[result addObject:aColor];
}

free(rawData);

return result;
}

+ (UIImage*)createResizableNinePatchImageNamed:(NSString*)name
{
NSAssert([name hasSuffix:@".9"], @"The image name is not ended with .9");

NSString* fixedImageFilename = [NSString stringWithFormat:@"%@%@", name, @".png"];
UIImage* oriImage = [UIImage imageNamed:fixedImageFilename];

NSAssert(oriImage != nil, @"The input image is incorrect: ");

NSString* fixed2xImageFilename = [NSString stringWithFormat:@"%@%@", [name substringWithRange:NSMakeRange(0, name.length - 2)], @"@2x.9.png"];
UIImage* ori2xImage = [UIImage imageNamed:fixed2xImageFilename];
if (ori2xImage != nil) {
Expand All @@ -70,7 +71,7 @@ + (UIImage*)createResizableNinePatchImageNamed:(NSString*)name
} else {
NSLog(@"NinePatchImageFactory[Info]: Using image: %@", fixedImageFilename);
}

return [self createResizableImageFromNinePatchImage:oriImage];
}

Expand All @@ -81,14 +82,22 @@ + (UIImage*)createResizableNinePatchImage:(UIImage*)image

+ (UIImage*)createResizableImageFromNinePatchImage:(UIImage*)ninePatchImage
{
NSArray* rgbaImage = [self getRGBAsFromImage:ninePatchImage atX:0 andY:0 count:ninePatchImage.size.width * ninePatchImage.size.height];
NSArray* topBarRgba = [rgbaImage subarrayWithRange:NSMakeRange(1, ninePatchImage.size.width - 2)];
float scl = ninePatchImage.scale;
int w = ninePatchImage.size.width * scl;
int h = ninePatchImage.size.height * scl;


NSArray* rgbaImage = [self getRGBAsFromImage:ninePatchImage atX:0 andY:0 count:w*h];
NSArray* topBarRgba = [rgbaImage subarrayWithRange:NSMakeRange(1, w - 2)];

NSMutableArray* leftBarRgba = [NSMutableArray arrayWithCapacity:0];
int count = [rgbaImage count];
for (int i = 0; i < count; i += ninePatchImage.size.width) {
for (int i = 0; i < count; i += w) {
[leftBarRgba addObject:rgbaImage[i]];
}


//int colori = 0;

int top = -1, left = -1, bottom = -1, right = -1;
count = [topBarRgba count];
for (int i = 0; i <= count - 1; i++) {
Expand Down Expand Up @@ -140,9 +149,8 @@ + (UIImage*)createResizableImageFromNinePatchImage:(UIImage*)ninePatchImage
NSAssert(NO, @"The 9-patch PNG format is not support.");
}
}

UIImage* cropImage = [ninePatchImage crop:CGRectMake(1, 1, ninePatchImage.size.width - 2, ninePatchImage.size.height - 2)];

return [cropImage resizableImageWithCapInsets:UIEdgeInsetsMake(top, left, bottom, right)];
}

Expand Down