Merge pull request gali8#190 from mgratzer/master

Added missing 'preprocessedImageForTesseract:sourceImage:' delegate forwarding.

TesseractOCR/G8RecognitionOperation.m

@@ -75,4 +75,12 @@ - (BOOL)shouldCancelImageRecognitionForTesseract:(G8Tesseract *)tesseract
     return canceled;
 }
 
+- (UIImage *)preprocessedImageForTesseract:(G8Tesseract *)tesseract sourceImage:(UIImage *)sourceImage
+{
+    if ([self.delegate respondsToSelector:@selector(preprocessedImageForTesseract:sourceImage:)]) {
+        return [self.delegate preprocessedImageForTesseract:tesseract sourceImage:sourceImage];
+    }
+    return nil;
+}
+
 @end

TestsProject/TestsProjectTests/G8RecognitionTestsHelper.m

@@ -13,6 +13,9 @@
 @interface G8RecognitionTestsHelper ()
 
 @property (nonatomic, strong, readwrite) G8Tesseract *tesseract;
+@property (nonatomic) BOOL progressDelegateCallbackCalledByQueue;
+@property (nonatomic) BOOL cancelDelegateCallbackCalledByQueue;
+@property (nonatomic) BOOL preprocessingDelegateCallbackCalledByQueue;
 
 @end
 
@@ -125,6 +128,15 @@ - (void)recognizeImageUsingOperation
 
     NSAssert(recognitionCompleteBlockInvoked == YES, @"Error! recognitionCompleteBlock has not been invoked");
     NSAssert(progressCallbackBlockInvoked == YES, @"Error! progressCallbackBlock has not been invoked");
+
+    NSAssert(self.progressDelegateCallbackCalledByQueue == YES, @"Error! progressImageRecognitionForTesseract has not been invoked by queue");
+    self.progressDelegateCallbackCalledByQueue = NO;
+
+    NSAssert(self.cancelDelegateCallbackCalledByQueue == YES, @"Error! shouldCancelImageRecognitionForTesseract has not been invoked by queue");
+    self.cancelDelegateCallbackCalledByQueue = NO;
+
+    NSAssert(self.preprocessingDelegateCallbackCalledByQueue == YES, @"Error! preprocessedImageForTesseract has not been invoked by queue");
+    self.preprocessingDelegateCallbackCalledByQueue = NO;
 };
 
 - (UIImage *)thresholdedImageForImage:(UIImage *)sourceImage
@@ -142,16 +154,19 @@ - (UIImage *)thresholdedImageForImage:(UIImage *)sourceImage
 
 - (void)progressImageRecognitionForTesseract:(G8Tesseract *)tesseract
 {
-
+    self.progressDelegateCallbackCalledByQueue = YES;
 }
 
 - (BOOL)shouldCancelImageRecognitionForTesseract:(G8Tesseract *)tesseract
 {
+    self.cancelDelegateCallbackCalledByQueue = YES;
     return NO;
 }
 
 - (UIImage *)preprocessedImageForTesseract:(G8Tesseract *)tesseract sourceImage:(UIImage *)sourceImage
 {
+    self.preprocessingDelegateCallbackCalledByQueue = YES;
+
     switch (self.customPreprocessingType) {
         case G8CustomPreprocessingNone:
             return nil;