Frame: Fix interlaced AddImage

Author: ferdnyc

src/Frame.cpp

@@ -818,16 +818,23 @@ void Frame::AddImage(std::shared_ptr<QImage> new_image, bool only_odd_lines)
 		// Ignore image of different sizes or formats
 		bool ret=false;
 		#pragma omp critical (AddImage)
-		if (image == new_image || image->size() != image->size() || image->format() != image->format())
-			ret=true;
-		if (ret)
+		{
+			if (image == new_image || image->size() != new_image->size()) {
+				ret = true;
+			}
+			else if (new_image->format() != image->format()) {
+				new_image = std::shared_ptr<QImage>(new QImage(new_image->convertToFormat(image->format())));
+			}
+		}
+		if (ret) {
 			return;
-
+		}
+		
 		// Get the frame's image
 		const GenericScopedLock<juce::CriticalSection> lock(addingImageSection);
 		#pragma omp critical (AddImage)
 		{
-			const unsigned char *pixels = image->constBits();
+			unsigned char *pixels = image->bits();
 			const unsigned char *new_pixels = new_image->constBits();
 
 			// Loop through the scanlines of the image (even or odd)
@@ -836,13 +843,13 @@ void Frame::AddImage(std::shared_ptr<QImage> new_image, bool only_odd_lines)
 				start = 1;
 
 			for (int row = start; row < image->height(); row += 2) {
-				memcpy((unsigned char *) pixels, new_pixels + (row * image->bytesPerLine()), image->bytesPerLine());
-				new_pixels += image->bytesPerLine();
+				int offset = row * image->bytesPerLine();
+				memcpy(pixels + offset, new_pixels + offset, image->bytesPerLine());
 			}
 
 			// Update height and width
-			width = image->width();
 			height = image->height();
+			width = image->width();
 			has_image_data = true;
 		}
 	}