Setting texture filter on a viewport texture

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1

Godot Version

4.3

Question

I’m using a viewport texture (2d scene) in a material for 3d (custom shader).In Godot 3.x I used to set my viewport texture's linear filter on/off with something like

node.get_node(“2dViewport”).get_texture().set_flags(Texture.FLAG_REPEAT)
node.get_node(“2dViewport”).get_texture().set_flags(Texture.FLAG_DEFAULT)

This let me change the viewport texture filtering at the press of a button. How can I do this in Godot 4 with gdscript? The subviewport itself has options ‘Canvas Items → Default Texture Filter’ but these do nothing for me.

2

you should be able to just set it:

viewport.canvas_item_default_texture_filter = DefaultCanvasItemTextureFilter.[...]
1 Like
3

It’s not doing anything for me

func _on_filter_toggled(toggled_on: bool) → void:
if toggled_on:
print(“filter linear”)
%viewport1.canvas_item_default_texture_filter = Viewport.DEFAULT_CANVAS_ITEM_TEXTURE_FILTER_LINEAR
else:
print(“filter nearest”)
%viewport1.canvas_item_default_texture_filter = Viewport.DEFAULT_CANVAS_ITEM_TEXTURE_FILTER_NEAREST

The only way I can change it is by setting it as a hint in the shader, but then I can’t change it with a button : /

4

Filtering has been moved to the Shader itself as uniform hints In your case it would be something like: uniform sampler2D viewport_texture: filter_linear; for example.

1 Like
5

That can’t be changed runtime anymore then…?

6

You can swap the shader.

7

Right. That’s um, ideal. So the options on the subviewport, do they just not do anything?

8

That’s for drawing into viewport.

Filtering is property of a sampler, not the texture itself, so it makes more sense to decouple it from the texture, which is what they did in v 4.

Make two versions of the shader and swap. If you need many shaders, move the sampler uniform declaration to a shader include.