/*
|
* Copyright 2012 ZXing authors
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
#import "ZXByteArray.h"
|
#import "ZXInvertedLuminanceSource.h"
|
#import "ZXLuminanceSource.h"
|
|
@implementation ZXLuminanceSource
|
|
- (id)initWithWidth:(int)width height:(int)height {
|
if (self = [super init]) {
|
_width = width;
|
_height = height;
|
_cropSupported = NO;
|
_rotateSupported = NO;
|
}
|
|
return self;
|
}
|
|
- (ZXByteArray *)rowAtY:(int)y row:(ZXByteArray *)row {
|
@throw [NSException exceptionWithName:NSInternalInconsistencyException
|
reason:[NSString stringWithFormat:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)]
|
userInfo:nil];
|
}
|
|
- (ZXByteArray *)matrix {
|
@throw [NSException exceptionWithName:NSInternalInconsistencyException
|
reason:[NSString stringWithFormat:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)]
|
userInfo:nil];
|
}
|
|
- (ZXLuminanceSource *)crop:(int)left top:(int)top width:(int)width height:(int)height {
|
@throw [NSException exceptionWithName:NSInternalInconsistencyException
|
reason:@"This luminance source does not support cropping."
|
userInfo:nil];
|
}
|
|
- (ZXLuminanceSource *)invert {
|
return [[ZXInvertedLuminanceSource alloc] initWithDelegate:self];
|
}
|
|
- (ZXLuminanceSource *)rotateCounterClockwise {
|
@throw [NSException exceptionWithName:NSInternalInconsistencyException
|
reason:@"This luminance source does not support rotation by 90 degrees."
|
userInfo:nil];
|
}
|
|
- (ZXLuminanceSource *)rotateCounterClockwise45 {
|
@throw [NSException exceptionWithName:NSInternalInconsistencyException
|
reason:@"This luminance source does not support rotation by 45 degrees."
|
userInfo:nil];
|
}
|
|
- (NSString *)description {
|
ZXByteArray *row = [[ZXByteArray alloc] initWithLength:self.width];
|
NSMutableString *result = [NSMutableString stringWithCapacity:self.height * (self.width + 1)];
|
for (int y = 0; y < self.height; y++) {
|
row = [self rowAtY:y row:row];
|
for (int x = 0; x < self.width; x++) {
|
int luminance = row.array[x] & 0xFF;
|
unichar c;
|
if (luminance < 0x40) {
|
c = '#';
|
} else if (luminance < 0x80) {
|
c = '+';
|
} else if (luminance < 0xC0) {
|
c = '.';
|
} else {
|
c = ' ';
|
}
|
[result appendFormat:@"%C", c];
|
}
|
[result appendString:@"\n"];
|
}
|
return result;
|
}
|
|
@end
|