Forums

 Hey Guys.

I'm having an issue when trying to export a Drawing block as an image.

This is the code I'm currently using:

	NSString* imagePath = @"IInkTempImage.jpg";

	NSString* path = [[NSFileManager defaultManager] pathForFileInDocumentDirectory:imagePath];
	
	ImageLoader *imageLoader = [[ImageLoader alloc] init];
	imageLoader.cacheFolderPath = NSTemporaryDirectory();
	imageLoader.editor = self.editor;
	ImageDrawer *imageDrawer = [[ImageDrawer alloc] init];
	imageDrawer.imageLoader = imageLoader;
	CGSize size = self.view.bounds.size;
	[imageDrawer prepareImage:size];
	[imageDrawer invalidate:_editor.renderer layers:IINKLayerTypeCapture];
	[imageDrawer saveImage:path];

but I'm getting an empty image out of this.

 I also tried using the export method instead of the saveImage one, but this way I end up with a 0kb file.

[self.editor export_:self.editor.rootBlock toFile:path mimeType:IINKMimeTypePNG imageDrawer:imageDrawer error:&error];

 any clues?

Thanks!

Using [self.editor export_:self.editor.rootBlock toFile:path mimeType:IINKMimeTypeJPEG imageDrawer:imageDrawer error:&error]; creates a 0 kb image.

I'm currently deleting the file (if existing) before creating the image

NSString* imagePath = @"IInkTempImage2.jpg";
	
	

	NSString* path = [[NSFileManager defaultManager] pathForFileInDocumentDirectory:imagePath];
	
	if ([[NSFileManager defaultManager] fileExistsAtPath:path])
		[[NSFileManager defaultManager] removeItemAtPath:path error:nil];

- (UIImage*) getConvertedImage {
	NSError* error;
	
	NSString* imagePath = @"IInkTempImage2.jpg";
	
	

	NSString* path = [[NSFileManager defaultManager] pathForFileInDocumentDirectory:imagePath];
	
	if ([[NSFileManager defaultManager] fileExistsAtPath:path])
		[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
	
	ImageLoader *imageLoader = [[ImageLoader alloc] init];
	imageLoader.cacheFolderPath = NSTemporaryDirectory();
	imageLoader.editor = self.editor;
	ImageDrawer *imageDrawer = [[ImageDrawer alloc] init];
	imageDrawer.imageLoader = imageLoader;
	CGSize size = self.view.bounds.size;
	size.height = size.height;
	size.width = size.width;
	[imageDrawer prepareImage:size];
	[imageDrawer invalidate:_editor.renderer layers:IINKLayerTypeBackground|IINKLayerTypeModel|IINKLayerTypeTemporary|IINKLayerTypeCapture];
//	[imageDrawer saveImage:path];
	
	
	[self.editor export_:self.editor.rootBlock toFile:path mimeType:IINKMimeTypeJPEG imageDrawer:imageDrawer error:&error];
	
	if (error)
		return nil;
	
	UIImage* image = [UIImage imageWithContentsOfFile:path];
	NSLog(@"%@",image);
	return image;
}

- (UIImage*) getConvertedImage {
	NSError* error;
	
	NSString* imagePath = @"IInkTempImage2.jpg";
	
	

	NSString* path = [[NSFileManager defaultManager] pathForFileInDocumentDirectory:imagePath];
	
	if ([[NSFileManager defaultManager] fileExistsAtPath:path])
		[[NSFileManager defaultManager] removeItemAtPath:path error:nil];
	
	ImageLoader *imageLoader = [[ImageLoader alloc] init];
	imageLoader.cacheFolderPath = NSTemporaryDirectory();
	imageLoader.editor = self.editor;
	ImageDrawer *imageDrawer = [[ImageDrawer alloc] init];
	imageDrawer.imageLoader = imageLoader;
	CGSize size = self.view.bounds.size;
	size.height = size.height;
	size.width = size.width;
	[imageDrawer prepareImage:size];
	[imageDrawer invalidate:_editor.renderer layers:IINKLayerTypeBackground|IINKLayerTypeModel|IINKLayerTypeTemporary|IINKLayerTypeCapture];
//	[imageDrawer saveImage:path];
	
	
	[self.editor export_:self.editor.rootBlock toFile:path mimeType:IINKMimeTypeJPEG imageDrawer:imageDrawer error:&error];
	
	if (error)
		return nil;
	
	UIImage* image = [UIImage imageWithContentsOfFile:path];
	NSLog(@"%@",image);
	return image;
}

Hey Oliver.

You were right. I was able to test back this today, after updating the SDK and it's working properly.

Thanks.

One more question, is there any way I can determine which part of the document I want saved? (Let's say I just want to save the top 30 % off the document, instead of all of it)

Hi Oliver. Thanks for your quick response.

I was following that thread, since I didn't find any help on this on the "Get Started" guide.

There's no "LayerType_ALL" constant, but I was able to make it work using all the available ones

[imageDrawer invalidate:_editor.renderer layers:IINKLayerTypeBackground|IINKLayerTypeModel|IINKLayerTypeTemporary|IINKLayerTypeCapture];

 Now the image is being generated, but the result is way too small (please see following images). I tried reducing the size to the half (currently 161 x 69) to see if that would grab less of the canvas, but it didn't work.

result image:

Any ideas?

Thanks!

Hey Oliver.

I did a couple of tests. This is the code I use to initialize the editor

ImageLoader *imageLoader = [[ImageLoader alloc] init];
	imageLoader.cacheFolderPath = [[NSFileManager defaultManager] tmpDirectory];
	
	CGFloat scale = scaledDpi();
	
	IINKRenderer *renderer = [self.engine createRendererWithDpiX:scale dpiY:scale target:displayViewController];
	
	self.editor = [self.engine createEditor:renderer];
	[self.editor setViewSize:self.view.bounds.size];
	[self.editor addDelegate:self];
	self.fontMetricsProvider = [[FontMetricsProvider alloc] init];
	[self.editor setFontMetricsProvider:self.fontMetricsProvider];
	imageLoader.editor = self.editor;
	
	displayViewController.renderer = renderer;
	displayViewController.imageLoader = imageLoader;
	inputView.editor = self.editor;
	
	smartGuideViewController.editor = self.editor;
	
	IINKConfiguration *conf = self.engine.configuration;
	double horizontalMarginMM = 0;
	double verticalMarginMM = 1;
	
	[conf setNumber:@"text.margin.top" value:verticalMarginMM error:nil];
	[conf setNumber:@"text.margin.bottom" value:verticalMarginMM error:nil];
	[conf setNumber:@"text.margin.left" value:horizontalMarginMM error:nil];
	[conf setNumber:@"text.margin.right" value:horizontalMarginMM error:nil];
	[conf setNumber:@"math.margin.top" value:verticalMarginMM error:nil];
	[conf setNumber:@"math.margin.bottom" value:verticalMarginMM error:nil];
	[conf setNumber:@"math.margin.left" value:horizontalMarginMM error:nil];
	[conf setNumber:@"math.margin.right" value:horizontalMarginMM error:nil];
	[conf setNumber:@"export.image-resolution" value:scale error:nil];
	
	
	//define pen style and converted text
	self.editor.theme = @".pen { -myscript-pen-width: 0.35;}"
	"glyph.text {"
	"  font-family: Avenir;"
	"  font-size: 5.5;"
	"  line-height: 0.9;"
	"}"
	".diagram-selection {-myscript-pen-width : 0.3}"
	".drawing {-myscript-pen-width : 0.3}";
	
	self.editor.penStyleClasses = @"pen";

 The scale is 132.

The first try was just adding     [conf setNumber:@"export.image-resolution" value:scale error:nil]; as you mentioned, but I didn't notice any changes on the image.

Again, there was no change on the image

I noticed the final images where double that size, so my next tries where to reduce that size, by 0.5

As you can see, there's no change on the image. (All images were attached as they were exported from the device).

Any ideas?