Trait willow::Program

pub trait Program: Sized {
    type AttrStruct: AttrStruct;
    fn create_internally(gl: &Context) -> Self;
    fn compile_shaders(&self, gl: &Context);
    fn link_shaders(&self, gl: &Context);
    fn apply_attrs(&self, context: &Context, buffer: &Buffer<Self::AttrStruct>);

    fn create(context: &Context) -> Self { ... }
    fn prepare_buffer(
        context: &Context, 
        attrs: &[Self::AttrStruct], 
        usage: BufferDataUsage
    ) -> Buffer<Self::AttrStruct> { ... }
    fn draw_fully(
        &self, 
        context: &Context, 
        mode: RenderPrimitiveType, 
        buffer: &Buffer<Self::AttrStruct>, 
        items: impl RangeBounds<usize>
    ) { ... }
}

Represents WebGL programs.

This type should only be implemented by the Program macro.

Associated Types

type AttrStruct: AttrStruct

The struct generated for storing attributes. Always #[repr(C)].

Required methods

fn create_internally(gl: &Context) -> Self

Creates an instance of the type. Allocate necessary resources like gl.createShader().

fn compile_shaders(&self, gl: &Context)

Compiles the vertex and fragment shaders.

fn link_shaders(&self, gl: &Context)

Attaches and links the vertex and fragment shaders.

fn apply_attrs(&self, context: &Context, buffer: &Buffer<Self::AttrStruct>)

Applies the buffer ot the attributes in this program.

Provided methods

fn create(context: &Context) -> Self

Compiles and links the program in the given Context.

fn prepare_buffer(
    context: &Context,
    attrs: &[Self::AttrStruct],
    usage: BufferDataUsage
) -> Buffer<Self::AttrStruct>

Prepares a buffer with the attributes in the vec.

fn draw_fully(
    &self,
    context: &Context,
    mode: RenderPrimitiveType,
    buffer: &Buffer<Self::AttrStruct>,
    items: impl RangeBounds<usize>
)

Runs the program with the given attributes.

Implementors