set corner radius for texture

Just like the picture description, this is a shader that adds corner radius to a texture. This is very convenient to used on viewport texture

Shader code
shader_type canvas_item;

uniform float corner_radius = 120;

bool in_rect(vec2 uv,vec2 orign,vec2 end)
{
  return all(lessThan(uv,end))&&all( greaterThan(uv,orign));
}

bool is_hid(vec2 uv,vec2 size,float radius)
{
  vec2 center = vec2(size.x*0.5,size.y*0.5);
  vec2 a = vec2(radius,radius);
  vec2 b = vec2(size.x-radius,size.y-radius);
	
  vec2 c = vec2(size.x-radius,radius);
  vec2 d = vec2(radius,size.y-radius);
	
  vec2 rd_origin = vec2(size.x - radius,0);
  vec2 rd_end = vec2(size.x,radius);
	
  vec2 lu_origin = vec2(0,size.y - radius);
  vec2 lu_end = vec2(radius,size.y);
	
	
  if(!in_rect(uv,a,b))
  {
    float dis = radius - 1.f;
    if(in_rect(uv,vec2(0.f),a))
    {
      dis = distance(a,uv);
    }
    if(in_rect(uv,b,size))
    {
      dis = distance(b,uv);
    }
    if(in_rect(uv,rd_origin,rd_end))
    {			
      dis = distance(c,uv);
    }
    if(in_rect(uv,lu_origin,lu_end))
    {
      dis = distance(d,uv);
    }
    return dis > radius;		
  }
  return false;
}


void fragment() 
{
  float pixel_size_x = 1.0 / TEXTURE_PIXEL_SIZE.x;
  float pixel_size_y = 1.0 / TEXTURE_PIXEL_SIZE.y;
  float max_r = min(pixel_size_x,pixel_size_y) / 2.f;

if(is_hid(vec2(UV.x*pixel_size_x,UV.y*pixel_size_y),vec2(pixel_size_x,pixel_size_y),min(corner_radius,max_r)))  
  {
    COLOR = vec4(0.0);
  }
  else 
  {
    COLOR = texture(TEXTURE,UV);
  }
}
Tags
corner radius
The shader code and all code snippets in this post are under CC0 license and can be used freely without the author's permission. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.

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thxthxthx
thxthxthx
2 years ago

ty

Alexander
Alexander
1 year ago

not valid radius

Jay
Jay
9 months ago

This only works when the image is square. When the image is not square, the edges are not rounded.

jack
7 months ago

Here’s my simple solution if this isn’t working for you:
https://godotshaders.com/shader/corner-radius/