Dala.Ui.GpuCanvas (dala v0.3.0)

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A GPU-accelerated canvas component for Dala UI trees.

Use this when you need custom pixel-level rendering inside a Dala screen.

Props

  • :width — Canvas width in pixels (default: 256)
  • :height — Canvas height in pixels (default: 256)
  • :paint — A fun/2 that receives the surface pid and info map, required

Example

defmodule MyApp.CanvasScreen do
  use Dala.Screen

  def render(assigns) do
    ~H"""
    <GpuCanvas width={256} height={256} paint={&paint/2} />
    """
  end

  def paint(canvas, _info) do
    Dala.Gpu.clear(canvas, :black)
    Dala.Gpu.fill_rect(canvas, 10, 10, 100, 100, :red)
    Dala.Gpu.present(canvas)
  end
end