my iOS device doesn't do any process with CITemperatureAndTint and CIToneCurve
but, in case of CISepiaTone is doing right !!
outputImage = [CIFilter filterWithName:@"CIToneCurve" keysAndValues:@"inputImage", image, @"inputPoint0", [CIVector vectorWithX:0 Y:0], @"inputPoint1", [CIVector vectorWithX:0.25 Y:0.25], @"inputPoint2", [CIVector vectorWithX:0.5 Y:0.5], @"inputPoint3", [CIVector vectorWithX:0.75 Y:0.75], @"inputPoint4", [CIVector vectorWithX:1 Y:1], nil].outputImage;
Is there any problem with that??
Use this code : It works
- (UIImage*)applyToneCurve:(NSArray*)pointArray {
if ([pointArray count] < 2) {
return self;
}
CGPoint first = [[pointArray objectAtIndex:0] CGPointValue];
first.x /= 255.0;
first.y /= 255.0;
CGPoint firstPoint = first;
CGPoint last = [[pointArray lastObject] CGPointValue];
last.x /= 255.0;
last.y /= 255.0;
CGPoint fifthPoint = last;
CGPoint secondPoint = CGPointMake(0.25, 0.25);
CGPoint thirdPoint = CGPointMake(0.50, 0.50);
CGPoint fourthPoint = CGPointMake(0.75, 0.75);
for (int i = 1; i < [pointArray count] - 1; i++) {
CGPoint point = [[pointArray objectAtIndex:i] CGPointValue];
point.x /= 255.0;
point.y /= 255.0;
if (i == 1) {
secondPoint = point;
}
else if (i == 2) {
thirdPoint = point;
}
else if (i == 3)
fourthPoint = point;
}
CIImage *inputImage = [CIImage imageWithCGImage:self.CGImage];
CIFilter *toneCurveFilter = [CIFilter filterWithName:@"CIToneCurve"];
[toneCurveFilter setDefaults];
[toneCurveFilter setValue:inputImage forKey:kCIInputImageKey];
[toneCurveFilter setValue:[CIVector vectorWithX:firstPoint.x Y:firstPoint.y] forKey:@"inputPoint0"];
[toneCurveFilter setValue:[CIVector vectorWithX:secondPoint.x Y:secondPoint.y] forKey:@"inputPoint1"];
[toneCurveFilter setValue:[CIVector vectorWithX:thirdPoint.x Y:thirdPoint.y] forKey:@"inputPoint2"];
[toneCurveFilter setValue:[CIVector vectorWithX:fourthPoint.x Y:fourthPoint.y] forKey:@"inputPoint3"];
[toneCurveFilter setValue:[CIVector vectorWithX:fifthPoint.x Y:fifthPoint.y] forKey:@"inputPoint4"];
CIImage *outputImage = [toneCurveFilter outputImage];
CGImageRef ref = [[CIContext contextWithOptions:nil] createCGImage:outputImage fromRect:outputImage.extent];
UIImage *result = [UIImage imageWithCGImage:ref];
if (ref) {
CGImageRelease(ref);
}
return result;
}
PointArray contains 5 NSValue points of curve from start to end.