milkbucket/main.go

package main

import "github.com/veandco/go-sdl2/sdl"

/*
#cgo CFLAGS: -I/home/nick/Downloads/include
#cgo LDFLAGS: -L/home/nick/.local/lib -lprojectM-4
#include "projectM-4/projectM.h"
*/
import "C"

func main() {
	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
		panic(err)
	}
	defer sdl.Quit()

	window, err := sdl.CreateWindow("test", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
		800, 600, sdl.WINDOW_OPENGL)
	if err != nil {
		panic(err)
	}
	defer window.Destroy()

	context, err := window.GLCreateContext()
	if err != nil {
		panic(err)
	}
	defer sdl.GLDeleteContext(context)

	handle := C.projectm_create()
	if (handle == nil) {
		panic("nil")
	}
	defer C.projectm_destroy(handle)

	C.projectm_set_window_size(handle, 800, 600)

	surface, err := window.GetSurface()
	if err != nil {
		panic(err)
	}
	surface.FillRect(nil, 0)

	rect := sdl.Rect{0, 0, 200, 200}
	colour := sdl.Color{R: 255, G: 0, B: 255, A: 255} // purple
	pixel := sdl.MapRGBA(surface.Format, colour.R, colour.G, colour.B, colour.A)
	surface.FillRect(&rect, pixel)
	window.UpdateSurface()

	running := true
	for running {
		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
			switch event.(type) {
			case *sdl.QuitEvent:
				println("Quit")
				running = false
				break
			}
		}
	}
}