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-rw-r--r--iphone/ZBarImage.m306
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diff --git a/iphone/ZBarImage.m b/iphone/ZBarImage.m
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+//------------------------------------------------------------------------
+// Copyright 2009-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+// This file is part of the ZBar Bar Code Reader.
+//
+// The ZBar Bar Code Reader is free software; you can redistribute it
+// and/or modify it under the terms of the GNU Lesser Public License as
+// published by the Free Software Foundation; either version 2.1 of
+// the License, or (at your option) any later version.
+//
+// The ZBar Bar Code Reader is distributed in the hope that it will be
+// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser Public License for more details.
+//
+// You should have received a copy of the GNU Lesser Public License
+// along with the ZBar Bar Code Reader; if not, write to the Free
+// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+// Boston, MA 02110-1301 USA
+//
+// http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+
+#import <UIKit/UIKit.h>
+#import <ZBarSDK/ZBarImage.h>
+#import "debug.h"
+
+static void image_cleanup(zbar_image_t *zimg)
+{
+ ZBarImage *image = zbar_image_get_userdata(zimg);
+ [image cleanup];
+}
+
+@implementation ZBarImage
+
+@dynamic format, sequence, size, crop, data, dataLength, symbols, zbarImage,
+ UIImage;
+
++ (unsigned long) fourcc: (NSString*) format
+{
+ return(zbar_fourcc_parse([format UTF8String]));
+}
+
+- (id) initWithImage: (zbar_image_t*) image
+{
+ if(!image) {
+ [self release];
+ return(nil);
+ }
+ if(self = [super init]) {
+ zimg = image;
+ zbar_image_ref(image, 1);
+ zbar_image_set_userdata(zimg, self);
+ }
+ return(self);
+}
+
+- (id) init
+{
+ zbar_image_t *image = zbar_image_create();
+ self = [self initWithImage: image];
+ zbar_image_ref(image, -1);
+ return(self);
+}
+
+- (void) dealloc
+{
+ if(zimg) {
+ zbar_image_ref(zimg, -1);
+ zimg = NULL;
+ }
+ [super dealloc];
+}
+
+- (id) initWithCGImage: (CGImageRef) image
+ crop: (CGRect) crop
+ size: (CGSize) size
+{
+ if(!(self = [self init]))
+ return(nil);
+ uint64_t t_start = timer_now();
+
+ unsigned int w = size.width + 0.5;
+ unsigned int h = size.height + 0.5;
+
+ unsigned long datalen = w * h;
+ uint8_t *raw = malloc(datalen);
+ if(!raw) {
+ [self release];
+ return(nil);
+ }
+
+ zbar_image_set_data(zimg, raw, datalen, zbar_image_free_data);
+ zbar_image_set_format(zimg, zbar_fourcc('Y','8','0','0'));
+ zbar_image_set_size(zimg, w, h);
+
+ // scale and crop simultaneously
+ CGFloat scale = size.width / crop.size.width;
+ crop.origin.x *= -scale;
+ crop.size.width = scale * (CGFloat)CGImageGetWidth(image);
+ scale = size.height / crop.size.height;
+ CGFloat height = CGImageGetHeight(image);
+ // compensate for wacky origin
+ crop.origin.y = height - crop.origin.y - crop.size.height;
+ crop.origin.y *= -scale;
+ crop.size.height = scale * height;
+
+ // generate grayscale image data
+ CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
+ CGContextRef ctx =
+ CGBitmapContextCreate(raw, w, h, 8, w, cs, kCGImageAlphaNone);
+ CGColorSpaceRelease(cs);
+ CGContextSetAllowsAntialiasing(ctx, 0);
+
+ CGContextDrawImage(ctx, crop, image);
+
+#if 0
+ zlog(@"convert image %dx%d: crop %g,%g %gx%g size %gx%g (%dx%d)",
+ CGImageGetWidth(image), CGImageGetHeight(image),
+ crop.origin.x, crop.origin.y, crop.size.width, crop.size.height,
+ size.width, size.height, w, h);
+ CGImageRef cgdump = CGBitmapContextCreateImage(ctx);
+ UIImage *uidump = [[UIImage alloc]
+ initWithCGImage: cgdump];
+ CGImageRelease(cgdump);
+ UIImageWriteToSavedPhotosAlbum(uidump, nil, nil, NULL);
+ [uidump release];
+#endif
+
+ CGContextRelease(ctx);
+
+ t_convert = timer_elapsed(t_start, timer_now());
+ return(self);
+}
+
+- (id) initWithCGImage: (CGImageRef) image
+ size: (CGSize) size
+{
+ CGRect crop = CGRectMake(0, 0,
+ CGImageGetWidth(image),
+ CGImageGetHeight(image));
+ return([self initWithCGImage: image
+ crop: crop
+ size: size]);
+}
+
+- (id) initWithCGImage: (CGImageRef) image
+{
+ CGRect crop = CGRectMake(0, 0,
+ CGImageGetWidth(image),
+ CGImageGetHeight(image));
+ return([self initWithCGImage: image
+ crop: crop
+ size: crop.size]);
+}
+
+- (zbar_image_t*) image
+{
+ return(zimg);
+}
+
+- (unsigned long) format
+{
+ return(zbar_image_get_format(zimg));
+}
+
+- (void) setFormat: (unsigned long) format
+{
+ zbar_image_set_format(zimg, format);
+}
+
+- (unsigned) sequence
+{
+ return(zbar_image_get_sequence(zimg));
+}
+
+- (void) setSequence: (unsigned) seq
+{
+ zbar_image_set_sequence(zimg, seq);
+}
+
+- (CGSize) size
+{
+ unsigned w, h;
+ zbar_image_get_size(zimg, &w, &h);
+ return(CGSizeMake(w, h));
+}
+
+- (void) setSize: (CGSize) size
+{
+ zbar_image_set_size(zimg, size.width + .5, size.height + .5);
+}
+
+- (CGRect) crop
+{
+ unsigned x, y, w, h;
+ zbar_image_get_crop(zimg, &x, &y, &w, &h);
+ return(CGRectMake(x, y, w, h));
+}
+
+- (void) setCrop: (CGRect) crop
+{
+ zbar_image_set_crop(zimg, crop.origin.x + .5, crop.origin.y + .5,
+ crop.size.width + .5, crop.size.height + .5);
+}
+
+- (ZBarSymbolSet*) symbols
+{
+ return([[[ZBarSymbolSet alloc]
+ initWithSymbolSet: zbar_image_get_symbols(zimg)]
+ autorelease]);
+}
+
+- (void) setSymbols: (ZBarSymbolSet*) symbols
+{
+ zbar_image_set_symbols(zimg, [symbols zbarSymbolSet]);
+}
+
+- (const void*) data
+{
+ return(zbar_image_get_data(zimg));
+}
+
+- (unsigned long) dataLength
+{
+ return(zbar_image_get_data_length(zimg));
+}
+
+- (void) setData: (const void*) data
+ withLength: (unsigned long) length
+{
+ zbar_image_set_data(zimg, data, length, image_cleanup);
+}
+
+- (zbar_image_t*) zbarImage
+{
+ return(zimg);
+}
+
+- (UIImage*) UIImageWithOrientation: (UIImageOrientation) orient
+{
+ unsigned long format = self.format;
+ size_t bpc, bpp;
+ switch(format)
+ {
+ case zbar_fourcc('R','G','B','3'):
+ bpc = 8;
+ bpp = 24;
+ break;
+ case zbar_fourcc('R','G','B','4'):
+ bpc = 8;
+ bpp = 32;
+ break;
+ case zbar_fourcc('R','G','B','Q'):
+ bpc = 5;
+ bpp = 16;
+ break;
+ default:
+ NSLog(@"ERROR: format %.4s(%08lx) is unsupported",
+ (char*)&format, format);
+ assert(0);
+ return(nil);
+ };
+
+ unsigned w = zbar_image_get_width(zimg);
+ unsigned h = zbar_image_get_height(zimg);
+ const void *data = zbar_image_get_data(zimg);
+ size_t datalen = zbar_image_get_data_length(zimg);
+ CGDataProviderRef datasrc =
+ CGDataProviderCreateWithData(self, data, datalen, (void*)CFRelease);
+ CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
+ CGImageRef cgimg =
+ CGImageCreate(w, h, bpc, bpp, ((bpp + 7) >> 3) * w, cs,
+ kCGBitmapByteOrderDefault |
+ kCGImageAlphaNoneSkipFirst,
+ datasrc, NULL, YES, kCGRenderingIntentDefault);
+ CGColorSpaceRelease(cs);
+ CGDataProviderRelease(datasrc);
+
+ UIImage *uiimg =
+ [UIImage imageWithCGImage: cgimg
+ scale: 1
+ orientation: orient];
+ CGImageRelease(cgimg);
+ return(uiimg);
+}
+
+- (UIImage*) UIImage
+{
+ return([self UIImageWithOrientation: UIImageOrientationUp]);
+}
+
+- (void) cleanup
+{
+}
+
+#if 0
+- (ZBarImage*) convertToFormat: (unsigned long) format
+{
+ zbar_image_t *zdst = zbar_image_convert(zimg, format);
+ ZBarImage *image = ;
+ return([[[ZBarImage alloc] initWithImage: zdst] autorelease]);
+}
+#endif
+
+@end
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