move window stuff to own file

main.go

@@ -1,85 +1,16 @@
 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"
-#include <stdlib.h>
 */
 import "C"
 
 import (
-	"encoding/binary"
+	"github.com/veandco/go-sdl2/sdl"
-	"errors"
-	"io"
-	"os"
-	"unsafe"
 )
 
-const bufSize uint = 2048
-
-type milkDropWindow struct {
-	window  *sdl.Window
-	context sdl.GLContext
-	handle  C.projectm_handle
-}
-
-func newMilkDropWindow(width, height int32) (*milkDropWindow, error) {
-	var m milkDropWindow
-	var err error
-
-	m.window, err = sdl.CreateWindow("milkbucket", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, width, height, sdl.WINDOW_OPENGL|sdl.WINDOW_RESIZABLE)
-	if err != nil {
-		return &m, err
-	}
-
-	m.context, err = m.window.GLCreateContext()
-	if err != nil {
-		return &m, err
-	}
-
-	m.handle = C.projectm_create()
-	if m.handle == nil {
-		return &m, errors.New("error creating projectM instance")
-	}
-
-	C.projectm_set_window_size(m.handle, C.ulong(width), C.ulong(height))
-
-	return &m, nil
-}
-
-func (m *milkDropWindow) destroy() {
-	C.projectm_destroy(m.handle)
-	sdl.GLDeleteContext(m.context)
-	m.window.Destroy()
-}
-
-func (m *milkDropWindow) loadPreset(preset string) {
-	cPreset := C.CString("/usr/share/projectM/presets/presets_stock/Zylot - Wisps.milk")
-	defer C.free(unsafe.Pointer(cPreset))
-	C.projectm_load_preset_file(m.handle, cPreset, false)
-}
-
-func (m *milkDropWindow) render() (bool, error) {
-	var audioData [bufSize]int16
-
-	err := binary.Read(os.Stdin, binary.LittleEndian, &audioData)
-	if err == io.ErrUnexpectedEOF {
-		return false, nil
-	} else if err != nil {
-		return true, err
-	}
-
-	C.projectm_pcm_add_int16(m.handle, (*C.int16_t)(&audioData[0]), C.uint(bufSize), C.PROJECTM_STEREO)
-
-	C.projectm_opengl_render_frame(m.handle)
-	m.window.GLSwap()
-
-	return true, nil
-}
-
 func handleWindowEvent(event *sdl.WindowEvent, handle C.projectm_handle) {
 	switch event.Event {
 	case sdl.WINDOWEVENT_RESIZED:

window.go

@@ -0,0 +1,79 @@
+package main
+
+/*
+#include "projectM-4/projectM.h"
+#include <stdlib.h>
+*/
+import "C"
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+	"os"
+	"unsafe"
+
+	"github.com/veandco/go-sdl2/sdl"
+)
+
+const bufSize uint = 2048
+
+type milkDropWindow struct {
+	window  *sdl.Window
+	context sdl.GLContext
+	handle  C.projectm_handle
+}
+
+func newMilkDropWindow(width, height int32) (*milkDropWindow, error) {
+	var m milkDropWindow
+	var err error
+
+	m.window, err = sdl.CreateWindow("milkbucket", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, width, height, sdl.WINDOW_OPENGL|sdl.WINDOW_RESIZABLE)
+	if err != nil {
+		return &m, err
+	}
+
+	m.context, err = m.window.GLCreateContext()
+	if err != nil {
+		return &m, err
+	}
+
+	m.handle = C.projectm_create()
+	if m.handle == nil {
+		return &m, errors.New("error creating projectM instance")
+	}
+
+	C.projectm_set_window_size(m.handle, C.ulong(width), C.ulong(height))
+
+	return &m, nil
+}
+
+func (m *milkDropWindow) destroy() {
+	C.projectm_destroy(m.handle)
+	sdl.GLDeleteContext(m.context)
+	m.window.Destroy()
+}
+
+func (m *milkDropWindow) loadPreset(preset string) {
+	cPreset := C.CString("/usr/share/projectM/presets/presets_stock/Zylot - Wisps.milk")
+	defer C.free(unsafe.Pointer(cPreset))
+	C.projectm_load_preset_file(m.handle, cPreset, false)
+}
+
+func (m *milkDropWindow) render() (bool, error) {
+	var audioData [bufSize]int16
+
+	err := binary.Read(os.Stdin, binary.LittleEndian, &audioData)
+	if err == io.ErrUnexpectedEOF {
+		return false, nil
+	} else if err != nil {
+		return true, err
+	}
+
+	C.projectm_pcm_add_int16(m.handle, (*C.int16_t)(&audioData[0]), C.uint(bufSize), C.PROJECTM_STEREO)
+
+	C.projectm_opengl_render_frame(m.handle)
+	m.window.GLSwap()
+
+	return true, nil
+}