mask

Android Mask bitmap on canvas gen a black space

Here is a solution which helped me to implement masking: public void draw(Canvas canvas) { Bitmap original = BitmapFactory.decodeResource(getContext().getResources(),R.drawable.original_image); Bitmap mask = BitmapFactory.decodeResource(getContext().getResources(),R.drawable.mask_image); //You can change original image here and draw anything you want to be masked on it. Bitmap result = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(), Config.ARGB_8888); Canvas tempCanvas = new Canvas(result); Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); … Read more

OpenGL – mask with multiple textures

This should work: glEnable(GL_BLEND); // Use a simple blendfunc for drawing the background glBlendFunc(GL_ONE, GL_ZERO); // Draw entire background without masking drawQuad(backgroundTexture); // Next, we want a blendfunc that doesn’t change the color of any pixels, // but rather replaces the framebuffer alpha values with values based // on the whiteness of the mask. In … Read more

Update row values where certain condition is met in pandas

I think you can use loc if you need update two columns to same value: df1.loc[df1[‘stream’] == 2, [‘feat’,’another_feat’]] = ‘aaaa’ print df1 stream feat another_feat a 1 some_value some_value b 2 aaaa aaaa c 2 aaaa aaaa d 3 some_value some_value If you need update separate, one option is use: df1.loc[df1[‘stream’] == 2, ‘feat’] … Read more

How to define TextBox input restrictions?

I’ve done this in the past with an attached behavior, which can be used like this: <TextBox b:Masking.Mask=”^\p{Lu}*$”/> The attached behavior code looks like this: /// <summary> /// Provides masking behavior for any <see cref=”TextBox”/>. /// </summary> public static class Masking { private static readonly DependencyPropertyKey _maskExpressionPropertyKey = DependencyProperty.RegisterAttachedReadOnly(“MaskExpression”, typeof(Regex), typeof(Masking), new FrameworkPropertyMetadata()); /// <summary> … Read more

How can I mask a UIImageView?

There’s an easier way. #import <QuartzCore/QuartzCore.h> // remember to include Framework as well CALayer *mask = [CALayer layer]; mask.contents = (id)[[UIImage imageNamed:@”mask.png”] CGImage]; mask.frame = CGRectMake(0, 0, <img_width>, <img_height>); yourImageView.layer.mask = mask; yourImageView.layer.masksToBounds = YES; For Swift 4 and plus follow code below let mask = CALayer() mask.contents = [ UIImage(named: “right_challenge_bg”)?.cgImage] as Any mask.frame … Read more

Pygame collision with masks

The offset parameter of the method overlap() is the relative position of the othermask in relation to the pygame.mask.Mask object. So the offset is calculated by subtracting the coordinates of slant from the coordinates of ball: offset_x, offset_y = (slant.rect.x – ball.rect.x), (slant.rect.y – ball.rect.y) offset = (ball.rect.x – slant.rect.x), (ball.rect.y – slant.rect.y) if slant.mask.overlap(ball.mask, … Read more

Implement an input with a mask

Input masks can be implemented using a combination of the keyup event, and the HTMLInputElement value, selectionStart, and selectionEnd properties. Here’s a very simple implementation which does some of what you want. It’s certainly not perfect, but works well enough to demonstrate the principle: Array.prototype.forEach.call(document.body.querySelectorAll(“*[data-mask]”), applyDataMask); function applyDataMask(field) { var mask = field.dataset.mask.split(”); // For … Read more