1
1
mirror of https://github.com/OpenDiablo2/OpenDiablo2 synced 2024-06-12 18:50:42 +00:00
OpenDiablo2/d2core/d2gui/d2gui.go
2020-02-09 14:12:04 -05:00

73 lines
1.1 KiB
Go

package d2gui
import (
"errors"
"github.com/OpenDiablo2/OpenDiablo2/d2core/d2render"
)
var (
ErrWasInit = errors.New("gui system is already initialized")
ErrNotInit = errors.New("gui system is not initialized")
)
var singleton *guiManager
func Initialize() error {
verifyNotInit()
var err error
if singleton, err = createGuiManager(); err != nil {
return err
}
return nil
}
func Render(target d2render.Surface) error {
verifyWasInit()
return singleton.render(target)
}
func Advance(elapsed float64) error {
verifyWasInit()
return singleton.advance(elapsed)
}
func Clear() {
verifyWasInit()
singleton.clear()
}
func ShowLoadScreen(progress float64) {
verifyWasInit()
singleton.showLoadScreen(progress)
}
func HideLoadScreen() {
verifyWasInit()
singleton.hideLoadScreen()
}
func ShowCursor() {
verifyWasInit()
singleton.showCursor()
}
func HideCursor() {
verifyWasInit()
singleton.hideCursor()
}
func verifyWasInit() {
if singleton == nil {
panic(ErrNotInit)
}
}
func verifyNotInit() {
if singleton != nil {
panic(ErrWasInit)
}
}