ebiten/run.go

/*
Copyright 2014 Hajime Hoshi

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package ebiten

// Run runs the game.
// f is a function which is called at every frame.
// The argument (*Image) is the render target that represents the screen.
//
// This function must be called from the main thread.
func Run(f func(*Image) error, width, height, scale int, title string) error {
	err := startUI(width, height, scale, title)
	if err != nil {
		return err
	}
	ui := currentUI
	defer ui.terminate()

	currentUI = ui
	defer func() {
		currentUI = nil
	}()

	for {
		ui.doEvents()
		if ui.isClosed() {
			return nil
		}
		if err := ui.draw(f); err != nil {
			return err
		}
	}
}