GLShaderNode

class GLShaderNode(*args, **kwargs)

Superclasses: RenderNode

A render node using a GL shader when drawing its children nodes.

Constructors

class GLShaderNode

classmethod new(shader: GLShader, bounds: Rect, args: Bytes, children: Sequence[RenderNode] | None = None) → GLShaderNode

Creates a GskRenderNode that will render the given shader into the area given by bounds.

The args is a block of data to use for uniform input, as per types and offsets defined by the shader. Normally this is generated by format_args or ShaderArgsBuilder.

See GLShader for details about how the shader should be written.

All the children will be rendered into textures (if they aren’t already GskTextureNodes, which will be used directly). These textures will be sent as input to the shader.

If the renderer doesn’t support GL shaders, or if there is any problem when compiling the shader, then the node will draw pink. You should use compile to ensure the shader will work for the renderer before using it.

Parameters:

• shader – the GskGLShader

• bounds – the rectangle to render the shader into

• args – Arguments for the uniforms

• children – array of child nodes, these will be rendered to textures and used as input.

Methods

class GLShaderNode

get_args() → Bytes

Gets args for the node.

get_child(idx: int) → RenderNode

Gets one of the children.

Parameters:

idx – the position of the child to get

get_n_children() → int

Returns the number of children

get_shader() → GLShader

Gets shader code for the node.