apply PShader on PImage

Programming Questions

clankill3r

in Programming Questions • 28 days ago

How can i apply a PShader on a PImage?

cam.filter(THRESHOLD, 0.7);
cam.filter(blur);

First line is ok since that's not a pshader. 2nd line is not.

Or is it not possible?

This is so slow:

cam.filter(BLUR, 1);

Replies(2)

andres

Re: apply PShader on PImage

28 days ago

filter() with a PShader argument is not currently implemented (I just opened an enhancement request for it). For the time being you could do something like this:

PImage img;

PGraphics pg;

PShader sh;

void setup() {

size(640, 360, P2D);

img = loadImage("image.jpg");

pg = createGraphics(img.width, img.height, P2D);

sh = loadShader("blur.glsl");

}

void draw() {

pg.beginDraw();

pg.image(img, 0, 0);

pg.filter(sh);

pg.endDraw();

image(pg, 0, 0);

}

so that pg will contain at the end the filtered version of the original image.

clankill3r

Re: apply PShader on PImage

28 days ago

thanks. I thought of that as well but i wondered if it would be slower .

Anyway, would be nice to have it accept a PShader anytime in the future.

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