102 lines
1.5 KiB
Go
102 lines
1.5 KiB
Go
package platform
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import (
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"errors"
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"runtime"
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"time"
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"github.com/FooSoft/lazarus/platform/imgui_backend"
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"github.com/go-gl/gl/v2.1/gl"
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"github.com/veandco/go-sdl2/sdl"
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)
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var (
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ErrAlreadyInit = errors.New("platform is already initialized")
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ErrWasNotInit = errors.New("platform was not initialized")
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)
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var state struct {
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isInit bool
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windows []Window
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}
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func Init() error {
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if state.isInit {
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return ErrAlreadyInit
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}
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runtime.LockOSThread()
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if err := sdl.Init(sdl.INIT_VIDEO); err != nil {
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return err
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}
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if err := gl.Init(); err != nil {
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return err
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}
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if err := imgui_backend.Init(); err != nil {
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return err
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}
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state.isInit = true
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return nil
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}
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func Shutdown() error {
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if !state.isInit {
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return ErrWasNotInit
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}
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for _, w := range state.windows {
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if err := w.Destroy(); err != nil {
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return err
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}
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}
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if err := imgui_backend.Shutdown(); err != nil {
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return err
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}
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state.windows = nil
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state.isInit = false
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return nil
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}
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func ProcessEvents() error {
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if !state.isInit {
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return ErrWasNotInit
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}
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var terminate bool
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for !terminate {
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for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
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switch event.(type) {
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case *sdl.QuitEvent:
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terminate = true
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break
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}
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}
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<-time.After(time.Millisecond * 25)
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}
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return nil
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}
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func CreateWindow(title string, width, height int) (Window, error) {
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if !state.isInit {
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return nil, ErrWasNotInit
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}
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window, err := newWindow(title, width, height)
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if err != nil {
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return nil, err
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}
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state.windows = append(state.windows, window)
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return window, err
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}
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