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A SPTexture category for Sparrow that will replace or remove colors.
//
// SPTexture+Additions.h
// Sparrow
//
// Created by Shilo White on 10/15/11.
// Copyright 2011 Shilocity Productions. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "SPTexture.h"
#import "SPStage.h"
#import "SPUtils.h"
#import "SPMacros.h"
@interface SPTexture (Additions)
- (id)initWithContentsOfFile:(NSString *)path removeColor:(uint)color;
- (id)initWithContentsOfFile:(NSString *)path removeColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor;
- (id)initWithContentsOfFile:(NSString *)path replaceColor:(uint)color withColor:(uint)newColor;
- (id)initWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor;
- (id)initWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor andAlpha:(float)alpha;
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path removeColor:(uint)color;
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path removeColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor;
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColor:(uint)color withColor:(uint)newColor;
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor;
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor andAlpha:(float)alpha;
@end
@implementation SPTexture (Additions)
- (id)initWithContentsOfFile:(NSString *)path removeColor:(uint)color {
return [self initWithContentsOfFile:path removeColorsWithMinColor:color maxColor:color];
}
- (id)initWithContentsOfFile:(NSString *)path removeColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor {
return [self initWithContentsOfFile:path replaceColorsWithMinColor:minColor maxColor:maxColor withColor:0 andAlpha:0];
}
- (id)initWithContentsOfFile:(NSString *)path replaceColor:(uint)color withColor:(uint)newColor {
return [self initWithContentsOfFile:path replaceColorsWithMinColor:color maxColor:color withColor:newColor];
}
- (id)initWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor {
return [self initWithContentsOfFile:path replaceColorsWithMinColor:minColor maxColor:maxColor withColor:newColor andAlpha:1.0f];
}
- (id)initWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor andAlpha:(float)alpha {
float contentScaleFactor = [SPStage contentScaleFactor];
NSString *fullPath = [SPUtils absolutePathToFile:path withScaleFactor:contentScaleFactor];
if (!fullPath) [NSException raise:SP_EXC_FILE_NOT_FOUND format:@"file '%@' not found", path];
UIImage *image = [UIImage imageWithContentsOfFile:fullPath];
float width = image.size.width;
float height = image.size.height;
uint minRed = SP_COLOR_PART_RED(minColor);
uint minGreen = SP_COLOR_PART_GREEN(minColor);
uint minBlue = SP_COLOR_PART_BLUE(minColor);
uint maxRed = SP_COLOR_PART_RED(maxColor);
uint maxGreen = SP_COLOR_PART_GREEN(maxColor);
uint maxBlue = SP_COLOR_PART_BLUE(maxColor);
float newRed = SP_COLOR_PART_RED(newColor)/255.0f;
float newGreen = SP_COLOR_PART_GREEN(newColor)/255.0f;
float newBlue = SP_COLOR_PART_BLUE(newColor)/255.0f;
return [[SPTexture alloc] initWithWidth:width height:height draw:^(CGContextRef context) {
CGRect bounds = CGRectMake(0, 0, width, height);
if (alpha) {
CGContextSetRGBFillColor(context, newRed, newGreen, newBlue, alpha);
CGContextFillRect(context, bounds);
}
float maskingColors[6] = {minRed, maxRed, minGreen, maxGreen, minBlue, maxBlue};
CGImageRef maskedImage = CGImageCreateWithMaskingColors(image.CGImage, maskingColors);
CGContextTranslateCTM(context, 0, height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextDrawImage(context, bounds, maskedImage);
CGImageRelease(maskedImage);
}];
}
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path removeColor:(uint)color {
return [[[self alloc] initWithContentsOfFile:path removeColor:color] autorelease];
}
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path removeColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor {
return [[[self alloc] initWithContentsOfFile:path removeColorsWithMinColor:minColor maxColor:maxColor] autorelease];
}
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColor:(uint)color withColor:(uint)newColor {
return [[[self alloc] initWithContentsOfFile:path replaceColor:color withColor:newColor] autorelease];
}
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor {
return [[[self alloc] initWithContentsOfFile:path replaceColorsWithMinColor:minColor maxColor:maxColor withColor:newColor] autorelease];
}
+ (SPTexture *)textureWithContentsOfFile:(NSString *)path replaceColorsWithMinColor:(uint)minColor maxColor:(uint)maxColor withColor:(uint)newColor andAlpha:(float)alpha {
return [[[self alloc] initWithContentsOfFile:path replaceColorsWithMinColor:minColor maxColor:maxColor withColor:newColor andAlpha:alpha] autorelease];
}
@end
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