mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
126 lines
2.7 KiB
Go
126 lines
2.7 KiB
Go
// Copyright 2016 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build android ios darwin,arm darwin,arm64
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package ui
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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/hajimehoshi/ebiten/internal/graphics/opengl"
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)
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func RunMainThreadLoop(ch <-chan error) error {
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return errors.New("ui: don't call this: use RunWithoutMainLoop instead of Run")
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}
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func Render(chError <-chan error) error {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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if chError == nil {
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return errors.New("ui: chError must not be nil")
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}
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// TODO: Check this is called on the rendering thread
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select {
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case chRender <- struct{}{}:
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return glContext.DoWork(chError, chRenderEnd)
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case <-time.After(500 * time.Millisecond):
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// This function must not be blocked. We need to break for timeout.
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return nil
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}
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}
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type userInterface struct {
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width int
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height int
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scale float64
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sizeChanged bool
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}
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var (
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chRender = make(chan struct{})
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chRenderEnd = make(chan struct{})
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currentUI = &userInterface{
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sizeChanged: true,
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}
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)
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func Run(width, height int, scale float64, title string, g GraphicsContext) error {
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u := currentUI
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u.width = width
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u.height = height
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u.scale = scale
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// title is ignored?
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var err error
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glContext, err = opengl.NewContext()
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if err != nil {
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return err
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}
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for {
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if err := u.update(g); err != nil {
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return err
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}
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}
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}
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func (u *userInterface) update(g GraphicsContext) error {
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<-chRender
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defer func() {
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chRenderEnd <- struct{}{}
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}()
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if u.sizeChanged {
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// Sizing also calls GL functions
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u.sizeChanged = false
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if err := g.SetSize(u.width, u.height, u.actualScreenScale()); err != nil {
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return err
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}
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return nil
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}
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if err := g.Update(); err != nil {
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return err
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}
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return nil
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}
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func SetScreenSize(width, height int) (bool, error) {
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// TODO: Implement
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return false, nil
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}
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func SetScreenScale(scale float64) (bool, error) {
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// TODO: Implement
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return false, nil
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}
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func ScreenScale() float64 {
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return currentUI.scale
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}
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func SetCursorVisibility(visibility bool) {
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// Do nothing
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}
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func (u *userInterface) actualScreenScale() float64 {
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return u.scale * deviceScale()
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}
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func UpdateTouches(touches []Touch) {
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currentInput.updateTouches(touches)
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}
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