Constructor

GskGLShaderNodenew

Declaration [src]

GskRenderNode*
gsk_gl_shader_node_new (
  GskGLShader* shader,
  const graphene_rect_t* bounds,
  GBytes* args,
  GskRenderNode** children,
  guint n_children
)

Description [src]

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 gsk_gl_shader_format_args() or GskShaderArgsBuilder.

See GskGLShader 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 gsk_gl_shader_compile() to ensure the shader will work for the renderer before using it.

Parameters

`shader`	`GskGLShader`
	The `GskGLShader`
	The data is owned by the caller of the function.
`bounds`	`graphene_rect_t`
	The rectangle to render the shader into.
	The data is owned by the caller of the function.
`args`	`GBytes`
	Arguments for the uniforms.
	The data is owned by the caller of the function.
`children`	An array of `GskRenderNode*`
	Array of child nodes, these will be rendered to textures and used as input.
	The argument can be `NULL`.
	The length of the array is specified in the `n_children` argument.
	The data is owned by the caller of the function.
`n_children`	`guint`
	Length of `children` (currenly the GL backend supports up to 4 children)

Return value

Returns:	`GskGLShaderNode`
	A new `GskRenderNode`
	The caller of the function takes ownership of the data, and is responsible for freeing it.