mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
398 lines
10 KiB
Go
398 lines
10 KiB
Go
// Copyright 2015 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 js
|
|
|
|
package ui
|
|
|
|
import (
|
|
"image"
|
|
"strconv"
|
|
"unicode"
|
|
|
|
"github.com/gopherjs/gopherjs/js"
|
|
|
|
"github.com/hajimehoshi/ebiten/internal/devicescale"
|
|
"github.com/hajimehoshi/ebiten/internal/opengl"
|
|
)
|
|
|
|
var canvas *js.Object
|
|
|
|
type userInterface struct {
|
|
width int
|
|
height int
|
|
scale float64
|
|
fullscreen bool
|
|
runnableInBackground bool
|
|
|
|
deviceScale float64
|
|
sizeChanged bool
|
|
windowFocus bool
|
|
}
|
|
|
|
var currentUI = &userInterface{
|
|
sizeChanged: true,
|
|
windowFocus: true,
|
|
}
|
|
|
|
func SetScreenSize(width, height int) bool {
|
|
return currentUI.setScreenSize(width, height, currentUI.scale, currentUI.fullscreen)
|
|
}
|
|
|
|
func SetScreenScale(scale float64) bool {
|
|
return currentUI.setScreenSize(currentUI.width, currentUI.height, scale, currentUI.fullscreen)
|
|
}
|
|
|
|
func ScreenScale() float64 {
|
|
return currentUI.scale
|
|
}
|
|
|
|
func SetFullscreen(fullscreen bool) {
|
|
currentUI.setScreenSize(currentUI.width, currentUI.height, currentUI.scale, fullscreen)
|
|
}
|
|
|
|
func IsFullscreen() bool {
|
|
return currentUI.fullscreen
|
|
}
|
|
|
|
func SetRunnableInBackground(runnableInBackground bool) {
|
|
currentUI.runnableInBackground = runnableInBackground
|
|
}
|
|
|
|
func IsRunnableInBackground() bool {
|
|
return currentUI.runnableInBackground
|
|
}
|
|
|
|
func ScreenOffset() (float64, float64) {
|
|
return 0, 0
|
|
}
|
|
|
|
func adjustCursorPosition(x, y int) (int, int) {
|
|
return x, y
|
|
}
|
|
|
|
func IsCursorVisible() bool {
|
|
// The initial value is an empty string, so don't compare with "auto" here.
|
|
return canvas.Get("style").Get("cursor").String() != "none"
|
|
}
|
|
|
|
func SetCursorVisibility(visibility bool) {
|
|
if visibility {
|
|
canvas.Get("style").Set("cursor", "auto")
|
|
} else {
|
|
canvas.Get("style").Set("cursor", "none")
|
|
}
|
|
}
|
|
|
|
func SetWindowIcon(iconImages []image.Image) {
|
|
// Do nothing
|
|
}
|
|
|
|
func (u *userInterface) getScale() float64 {
|
|
if !u.fullscreen {
|
|
return u.scale
|
|
}
|
|
doc := js.Global.Get("document")
|
|
body := doc.Get("body")
|
|
bw := body.Get("clientWidth").Float()
|
|
bh := body.Get("clientHeight").Float()
|
|
sw := bw / float64(u.width)
|
|
sh := bh / float64(u.height)
|
|
if sw > sh {
|
|
return sh
|
|
}
|
|
return sw
|
|
}
|
|
|
|
func (u *userInterface) actualScreenScale() float64 {
|
|
return u.getScale() * u.deviceScale
|
|
}
|
|
|
|
func (u *userInterface) update(g GraphicsContext) error {
|
|
if !u.runnableInBackground && !u.windowFocus {
|
|
return nil
|
|
}
|
|
if opengl.GetContext().IsContextLost() {
|
|
opengl.GetContext().RestoreContext()
|
|
g.Invalidate()
|
|
}
|
|
currentInput.updateGamepads()
|
|
if u.sizeChanged {
|
|
u.sizeChanged = false
|
|
g.SetSize(u.width, u.height, u.actualScreenScale())
|
|
return nil
|
|
}
|
|
if err := g.Update(func() {
|
|
currentInput.runeBuffer = nil
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (u *userInterface) loop(g GraphicsContext) error {
|
|
ch := make(chan error)
|
|
var f func()
|
|
f = func() {
|
|
go func() {
|
|
if err := u.update(g); err != nil {
|
|
ch <- err
|
|
close(ch)
|
|
return
|
|
}
|
|
js.Global.Get("window").Call("requestAnimationFrame", f)
|
|
}()
|
|
}
|
|
f()
|
|
return <-ch
|
|
}
|
|
|
|
func touchEventToTouches(e *js.Object) []touch {
|
|
scale := currentUI.getScale()
|
|
j := e.Get("targetTouches")
|
|
rect := canvas.Call("getBoundingClientRect")
|
|
left, top := rect.Get("left").Int(), rect.Get("top").Int()
|
|
t := make([]touch, j.Get("length").Int())
|
|
for i := 0; i < len(t); i++ {
|
|
jj := j.Call("item", i)
|
|
t[i].id = jj.Get("identifier").Int()
|
|
t[i].x = int(float64(jj.Get("clientX").Int()-left) / scale)
|
|
t[i].y = int(float64(jj.Get("clientY").Int()-top) / scale)
|
|
}
|
|
return t
|
|
}
|
|
|
|
func init() {
|
|
if err := initialize(); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
func initialize() error {
|
|
// Do nothing in node.js.
|
|
if js.Global.Get("require") != js.Undefined {
|
|
return nil
|
|
}
|
|
|
|
doc := js.Global.Get("document")
|
|
window := js.Global.Get("window")
|
|
if doc.Get("body") == nil {
|
|
ch := make(chan struct{})
|
|
window.Call("addEventListener", "load", func() {
|
|
close(ch)
|
|
})
|
|
<-ch
|
|
}
|
|
window.Call("addEventListener", "focus", func() {
|
|
currentUI.windowFocus = true
|
|
})
|
|
window.Call("addEventListener", "blur", func() {
|
|
currentUI.windowFocus = false
|
|
})
|
|
window.Call("addEventListener", "resize", func() {
|
|
currentUI.updateScreenSize()
|
|
})
|
|
|
|
// Adjust the initial scale to 1.
|
|
// https://developer.mozilla.org/en/docs/Mozilla/Mobile/Viewport_meta_tag
|
|
meta := doc.Call("createElement", "meta")
|
|
meta.Set("name", "viewport")
|
|
meta.Set("content", "width=device-width, initial-scale=1")
|
|
doc.Get("head").Call("appendChild", meta)
|
|
|
|
canvas = doc.Call("createElement", "canvas")
|
|
canvas.Set("width", 16)
|
|
canvas.Set("height", 16)
|
|
doc.Get("body").Call("appendChild", canvas)
|
|
|
|
htmlStyle := doc.Get("documentElement").Get("style")
|
|
htmlStyle.Set("height", "100%")
|
|
htmlStyle.Set("margin", "0")
|
|
htmlStyle.Set("padding", "0")
|
|
|
|
bodyStyle := doc.Get("body").Get("style")
|
|
bodyStyle.Set("backgroundColor", "#000")
|
|
bodyStyle.Set("position", "relative")
|
|
bodyStyle.Set("height", "100%")
|
|
bodyStyle.Set("margin", "0")
|
|
bodyStyle.Set("padding", "0")
|
|
// TODO: This is OK as long as the game is in an independent iframe.
|
|
// What if the canvas is embedded in a HTML directly?
|
|
doc.Get("body").Call("addEventListener", "click", func() {
|
|
canvas.Call("focus")
|
|
})
|
|
|
|
canvasStyle := canvas.Get("style")
|
|
canvasStyle.Set("position", "absolute")
|
|
|
|
// Make the canvas focusable.
|
|
canvas.Call("setAttribute", "tabindex", 1)
|
|
canvas.Get("style").Set("outline", "none")
|
|
|
|
// Keyboard
|
|
canvas.Call("addEventListener", "keydown", func(e *js.Object) {
|
|
c := e.Get("code")
|
|
if c == js.Undefined {
|
|
code := e.Get("keyCode").Int()
|
|
if keyCodeToKeyEdge[code] == KeyUp ||
|
|
keyCodeToKeyEdge[code] == KeyDown ||
|
|
keyCodeToKeyEdge[code] == KeyLeft ||
|
|
keyCodeToKeyEdge[code] == KeyRight ||
|
|
keyCodeToKeyEdge[code] == KeyBackspace ||
|
|
keyCodeToKeyEdge[code] == KeyTab {
|
|
e.Call("preventDefault")
|
|
}
|
|
currentInput.keyDownEdge(code)
|
|
return
|
|
}
|
|
cs := c.String()
|
|
if cs == keyToCodes[KeyUp][0] ||
|
|
cs == keyToCodes[KeyDown][0] ||
|
|
cs == keyToCodes[KeyLeft][0] ||
|
|
cs == keyToCodes[KeyRight][0] ||
|
|
cs == keyToCodes[KeyBackspace][0] ||
|
|
cs == keyToCodes[KeyTab][0] {
|
|
e.Call("preventDefault")
|
|
}
|
|
currentInput.keyDown(cs)
|
|
})
|
|
canvas.Call("addEventListener", "keypress", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
if r := rune(e.Get("charCode").Int()); unicode.IsPrint(r) {
|
|
currentInput.runeBuffer = append(currentInput.runeBuffer, r)
|
|
}
|
|
})
|
|
canvas.Call("addEventListener", "keyup", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
if e.Get("code") == js.Undefined {
|
|
// Assume that UA is Edge.
|
|
code := e.Get("keyCode").Int()
|
|
currentInput.keyUpEdge(code)
|
|
}
|
|
code := e.Get("code").String()
|
|
currentInput.keyUp(code)
|
|
})
|
|
|
|
// Mouse
|
|
canvas.Call("addEventListener", "mousedown", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
button := e.Get("button").Int()
|
|
currentInput.mouseDown(button)
|
|
setMouseCursorFromEvent(e)
|
|
})
|
|
canvas.Call("addEventListener", "mouseup", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
button := e.Get("button").Int()
|
|
currentInput.mouseUp(button)
|
|
setMouseCursorFromEvent(e)
|
|
})
|
|
canvas.Call("addEventListener", "mousemove", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
setMouseCursorFromEvent(e)
|
|
})
|
|
canvas.Call("addEventListener", "contextmenu", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
})
|
|
|
|
// Touch
|
|
canvas.Call("addEventListener", "touchstart", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
currentInput.updateTouches(touchEventToTouches(e))
|
|
})
|
|
canvas.Call("addEventListener", "touchend", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
currentInput.updateTouches(touchEventToTouches(e))
|
|
})
|
|
canvas.Call("addEventListener", "touchmove", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
currentInput.updateTouches(touchEventToTouches(e))
|
|
})
|
|
|
|
// Gamepad
|
|
window.Call("addEventListener", "gamepadconnected", func(e *js.Object) {
|
|
// Do nothing.
|
|
})
|
|
|
|
canvas.Call("addEventListener", "webglcontextlost", func(e *js.Object) {
|
|
e.Call("preventDefault")
|
|
})
|
|
canvas.Call("addEventListener", "webglcontextrestored", func(e *js.Object) {
|
|
// Do nothing.
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func setMouseCursorFromEvent(e *js.Object) {
|
|
scale := currentUI.getScale()
|
|
rect := canvas.Call("getBoundingClientRect")
|
|
x, y := e.Get("clientX").Int(), e.Get("clientY").Int()
|
|
x -= rect.Get("left").Int()
|
|
y -= rect.Get("top").Int()
|
|
currentInput.setMouseCursor(int(float64(x)/scale), int(float64(y)/scale))
|
|
}
|
|
|
|
func RunMainThreadLoop(ch <-chan error) error {
|
|
return <-ch
|
|
}
|
|
|
|
func Run(width, height int, scale float64, title string, g GraphicsContext) error {
|
|
u := currentUI
|
|
doc := js.Global.Get("document")
|
|
doc.Set("title", title)
|
|
u.setScreenSize(width, height, scale, u.fullscreen)
|
|
canvas.Call("focus")
|
|
if err := opengl.Init(); err != nil {
|
|
return err
|
|
}
|
|
return u.loop(g)
|
|
}
|
|
|
|
func (u *userInterface) setScreenSize(width, height int, scale float64, fullscreen bool) bool {
|
|
if u.width == width && u.height == height &&
|
|
u.scale == scale && fullscreen == u.fullscreen {
|
|
return false
|
|
}
|
|
u.width = width
|
|
u.height = height
|
|
u.scale = scale
|
|
u.fullscreen = fullscreen
|
|
u.updateScreenSize()
|
|
return true
|
|
}
|
|
|
|
func (u *userInterface) updateScreenSize() {
|
|
// CSS imageRendering seems useful to enlarge the screen,
|
|
// but doesn't work in some cases (#306):
|
|
// * Chrome just after restoring the lost context
|
|
// * Safari
|
|
// Let's use the pixel ratio as it is here.
|
|
u.deviceScale = devicescale.DeviceScale()
|
|
|
|
canvas.Set("width", int(float64(u.width)*u.actualScreenScale()))
|
|
canvas.Set("height", int(float64(u.height)*u.actualScreenScale()))
|
|
canvasStyle := canvas.Get("style")
|
|
|
|
s := u.getScale()
|
|
cssWidth := int(float64(u.width) * s)
|
|
cssHeight := int(float64(u.height) * s)
|
|
canvasStyle.Set("width", strconv.Itoa(cssWidth)+"px")
|
|
canvasStyle.Set("height", strconv.Itoa(cssHeight)+"px")
|
|
// CSS calc requires space chars.
|
|
canvasStyle.Set("left", "calc((100% - "+strconv.Itoa(cssWidth)+"px) / 2)")
|
|
canvasStyle.Set("top", "calc((100% - "+strconv.Itoa(cssHeight)+"px) / 2)")
|
|
|
|
u.sizeChanged = true
|
|
}
|