ebiten/internal/ui/ui_mobile.go
2016-09-03 18:54:21 +09:00

126 lines
2.7 KiB
Go

// Copyright 2016 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.
// +build android ios darwin,arm darwin,arm64
package ui
import (
"errors"
"runtime"
"time"
"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
)
func RunMainThreadLoop(ch <-chan error) error {
return errors.New("ui: don't call this: use RunWithoutMainLoop instead of Run")
}
func Render(chError <-chan error) error {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
if chError == nil {
return errors.New("ui: chError must not be nil")
}
// TODO: Check this is called on the rendering thread
select {
case chRender <- struct{}{}:
return glContext.DoWork(chError, chRenderEnd)
case <-time.After(500 * time.Millisecond):
// This function must not be blocked. We need to break for timeout.
return nil
}
}
type userInterface struct {
width int
height int
scale float64
sizeChanged bool
}
var (
chRender = make(chan struct{})
chRenderEnd = make(chan struct{})
currentUI = &userInterface{
sizeChanged: true,
}
)
func Run(width, height int, scale float64, title string, g GraphicsContext) error {
u := currentUI
u.width = width
u.height = height
u.scale = scale
// title is ignored?
var err error
glContext, err = opengl.NewContext()
if err != nil {
return err
}
for {
if err := u.update(g); err != nil {
return err
}
}
}
func (u *userInterface) update(g GraphicsContext) error {
<-chRender
defer func() {
chRenderEnd <- struct{}{}
}()
if u.sizeChanged {
// Sizing also calls GL functions
u.sizeChanged = false
if err := g.SetSize(u.width, u.height, u.actualScreenScale()); err != nil {
return err
}
return nil
}
if err := g.Update(); err != nil {
return err
}
return nil
}
func SetScreenSize(width, height int) (bool, error) {
// TODO: Implement
return false, nil
}
func SetScreenScale(scale float64) (bool, error) {
// TODO: Implement
return false, nil
}
func ScreenScale() float64 {
return currentUI.scale
}
func SetCursorVisibility(visibility bool) {
// Do nothing
}
func (u *userInterface) actualScreenScale() float64 {
return u.scale * deviceScale()
}
func UpdateTouches(touches []Touch) {
currentInput.updateTouches(touches)
}