How do i delete a color from a sprite?

Question

I got a texture for a sprite and I had like the delete the white from it to make it transparent so it wont overdraw the background

Answer 1

Just delete the white pixels and leave it transparent in an image editor?

Comments

is there a way i can do it with shaders?

---

Do you really need the white part of the image?
Anyways, here is a simple CanvasItemMaterial fragment shader that makes white pixels transparent:

vec4 col = tex(TEXTURE, UV);
if(col.rgb == vec3(1,1,1)) {
    col.a = 0;
}
COLOR = col * SRC_COLOR;

But I still think it would be much simpler if you open the image in Paint.NET / Photoshop / Gimp and make the areas you want transparent.