mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 03:08:54 +01:00
157 lines
3.7 KiB
Go
157 lines
3.7 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 (
|
|
"github.com/gopherjs/gopherjs/js"
|
|
"github.com/gopherjs/webgl"
|
|
"github.com/hajimehoshi/ebiten/internal/opengl"
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
var canvas js.Object
|
|
var context *opengl.Context
|
|
|
|
func Use(f func(*opengl.Context)) {
|
|
f(context)
|
|
}
|
|
|
|
func DoEvents() {
|
|
time.Sleep(0)
|
|
}
|
|
|
|
func Terminate() {
|
|
// Do nothing.
|
|
}
|
|
|
|
func IsClosed() bool {
|
|
return false
|
|
}
|
|
|
|
func SwapBuffers() {
|
|
// Do nothing.
|
|
}
|
|
|
|
func init() {
|
|
ch := make(chan struct{})
|
|
js.Global.Get("window").Set("onload", func() {
|
|
close(ch)
|
|
})
|
|
<-ch
|
|
|
|
doc := js.Global.Get("document")
|
|
doc.Set("onkeydown", func(e js.Object) bool {
|
|
code := e.Get("keyCode").Int()
|
|
// Backspace
|
|
if code == 8 {
|
|
return false
|
|
}
|
|
// Functions
|
|
if 112 <= code && code <= 123 {
|
|
return false
|
|
}
|
|
// Alt and arrows
|
|
if code == 37 && code == 39 {
|
|
// Don't need to check Alt.
|
|
return false
|
|
}
|
|
return true
|
|
})
|
|
|
|
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")
|
|
doc.Get("body").Set("onclick", func() {
|
|
canvas.Call("focus")
|
|
})
|
|
|
|
canvasStyle := canvas.Get("style")
|
|
canvasStyle.Set("position", "absolute")
|
|
|
|
webglContext, err := webgl.NewContext(canvas, &webgl.ContextAttributes{
|
|
Alpha: true,
|
|
PremultipliedAlpha: true,
|
|
})
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
context = opengl.NewContext(webglContext)
|
|
|
|
// Make the canvas focusable.
|
|
canvas.Call("setAttribute", "tabindex", 1)
|
|
canvas.Get("style").Set("outline", "none")
|
|
|
|
canvas.Set("onkeydown", func(e js.Object) bool {
|
|
code := e.Get("keyCode").Int()
|
|
currentInput.keyDown(code)
|
|
return false
|
|
})
|
|
canvas.Set("onkeyup", func(e js.Object) bool {
|
|
code := e.Get("keyCode").Int()
|
|
currentInput.keyUp(code)
|
|
return false
|
|
})
|
|
canvas.Set("onmousedown", func(e js.Object) bool {
|
|
button := e.Get("button").Int()
|
|
currentInput.mouseDown(button)
|
|
return false
|
|
})
|
|
canvas.Set("onmouseup", func(e js.Object) bool {
|
|
button := e.Get("button").Int()
|
|
currentInput.mouseUp(button)
|
|
return false
|
|
})
|
|
canvas.Set("oncontextmenu", func(e js.Object) bool {
|
|
return false
|
|
})
|
|
}
|
|
|
|
func Start(width, height, scale int, title string) (actualScale int, err error) {
|
|
doc := js.Global.Get("document")
|
|
doc.Set("title", title)
|
|
canvas.Set("width", width*scale)
|
|
canvas.Set("height", height*scale)
|
|
canvasStyle := canvas.Get("style")
|
|
canvasStyle.Set("left", "calc(50% - "+strconv.Itoa(width*scale/2)+"px)")
|
|
canvasStyle.Set("top", "calc(50% - "+strconv.Itoa(height*scale/2)+"px)")
|
|
|
|
canvas.Set("onmousemove", func(e js.Object) {
|
|
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.mouseMove(x/scale, y/scale)
|
|
})
|
|
canvas.Call("focus")
|
|
|
|
return scale, nil
|
|
}
|