package gg

import (
	"github.com/hajimehoshi/ebiten/v2"
	//"fmt"
)

type ShaderOptions struct {
	Shader *Shader
	Uniforms map[string] any
	Images [4]*Image
}

type Shader = ebiten.Shader

var (
	// The shader is for example only.
	SolidWhiteColorShader = MustNewShader([]byte(`
		package main
		
		//var Random float
		
		func Fragment(dst vec4,  src vec2, _ vec4) vec4 {
			c := imageSrc0UnsafeAt(src)
			return c * sin(dst.x)
		}
	`))
)

func MustNewShader(src []byte) (*Shader) {
	shader, err := NewShader(src)
	if err != nil {
		panic(err)
	}
	
	return shader
}

func NewShader(src []byte) (*Shader, error) {
	return ebiten.NewShader(src)
}