blend | A parser and runtime for Blender 's .blend files | Addon library

Does anyone know why transparency drawing on a Canvas works perfectly fine using drawImage(), but doesn't work at all with a PixelWriter? I initially thought it may have something to do with Blend or some other mode/setting on the canvas/context, but haven't had any luck with that yet.

I need per-pixel variable transparency, not a single transparency value for the entire draw operation. I'll be rendering a number of "layers" (similar to how GIMP layers work, with optional transparency per-pixel). An additional open question is whether I'm better off first drawing the FINAL intended output to a WritableImage and then just drawing to the Canvas, for performance reasons, but that seems to defeat the point of using a Canvas in the first place...

Below is an example which shows a partially transparent Color being first drawn to an Image and then to the Canvas, and directly to the Canvas with setColor(). The transparent area is the Image draw, the opaque area is the setColor part. How do we get setColor() to respect Color alpha transparency for each pixel?

I am having really weird issues with memory leak and I cannot find source after long hours of testing, debugging and trial/error attempts.

The source of memory leak is reloading object base on push from subject. On which part I load current database values and add it to SourceCache.

This part is getting the push, to initiate reload

On a website I'm creating there is a cursor that needs to change its color smoothly.
When it is on a white background the cursor needs to be the blue #0059ff (this is important and I will explain why later on) and when it is on blue then the cursor needs to be white; and the transition needs to be smooth like so:

To get the white color with mix-blend-mode I'm calculating the inverted color using adjust-hue($color, 180) (in SCSS) and applying this color to the cursor.

When the background color is #0000ff then cursor should be #ffff00.

I have started a prototype using mix-blend-mode: difference that works on "primary colors" (basically colors like #ff0000, #ff00ff and so on).
Result:

Problems begin when I try to change the "primary" blue #0000ff to the one needed by the project #0059ff. The inverted color is calculated to be #ffa600 and the result is, let's say, "unsatisfactory" because I want the cursor to be white on some background color and said color on white background.

Calculating the difference will not work with this color and I have no idea how to make it so that when the cursor is not over the white background then the cursor becomes blue (-ish) and when it's over the blue background it becomes white.

My whole code so far:
(SCSS compiled so it can run in StackSnippet)

I'm currently writing a gravity-simulation and I have a small problem displaying the particles with OpenGL.

To get "round" particles, I create a small float-array like this:

I want to add text to a can of beans. The example code uses render.copyTextureToTexture to blend textures together.

However, when I try to use it doesn't do anything.

When I tried to display textTexture on the cylinder it was fully transparent. Is the texture made before text is rendered in the first canvas?

Or do I need to somehow wait until the image is loaded and only then use copyTextureToTexture to add the text?

I want to turn this halting, discontinuous trails in the particle on this simulation

to something worth staring at as in this beautiful field flow in here (not my work, but I don't remember where I got it from).

I have tried different permutations of the code in the accomplished field flow without getting anything remotely close to the smoothness in the transitions that I was aiming for. I suspect I am mishandling the updates or the placement of the black rectangle that seems to circumvent the need for a black background, which would erase the wake of the particles.

I have a small page with a blurred background image. On top of that, I have divs set up as cards that have their transparent overlay on a background image. I'm trying to set up a text effect using blending modes without taking into account the overlay.

The text effect I want to replicate is at this codepen: https://codepen.io/thebabydino/pen/JNWqLL

Specifically, I want to replicate the example on the left, where the drop shadow is inverted along with the text, and the text is the invert of the image underneath.

In my attempts to do so, I have been unable to get the blend mode effect to ignore the opaque layer and only focus on the image.

The point of the opaque layer is to help the text stand out more, but it seems to be having the opposite effect as it influences the blending, making everything darker.

The text is only orange because it is being constantly inverted due to the darker opaque layer and ignoring the image underneath completely.

This is my attempt so far:

I have been stumped by this for a few days now and can't find a solution. I have a UIImageView with a transparent background. It is on top of another view (in the example just a UIView with blue background color). For some reason, it will blend a color even if it has an alpha value of 0 (in this case full red no alpha values come out pink). The desired output is that it will show clear just like black with no alpha value.

If over white it behaves as intended (it is clear and shows white through). I have tried different ways of creating the CGContext and different CALayer blend modes and can't get it to not blend colors that don't have alpha values on them.

Here is some sample code to replicate the issue.

So I've got an SVG shape that I'm animating using GSAP, and you can find it in this codepen here. What I want to happen is that when the lines intersect the pink circle, the inner lines turn white, like in this image:

I've tried using CSS Blendmodes, like so: