mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2025-02-15 20:40:13 +01:00
114 lines
2.8 KiB
Go
114 lines
2.8 KiB
Go
// Copyright 2019 The Ebiten Authors
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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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package ebitenmobileview
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// #cgo ios LDFLAGS: -framework UIKit -framework GLKit -framework QuartzCore -framework OpenGLES
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//
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// #include <stdint.h>
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import "C"
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import (
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"math"
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"runtime"
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"sync"
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"github.com/hajimehoshi/ebiten"
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)
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var theState state
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// game is not exported since gomobile complains.
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// TODO: Report this error.
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type game interface {
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Update(*ebiten.Image) error
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Layout(viewWidth, viewHeight int) (screenWidth, screenHeight int)
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}
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type state struct {
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game game
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running bool
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// m is a mutex required for each function.
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// For example, on Android, Update can be called from a different thread:
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// https://developer.android.com/reference/android/opengl/GLSurfaceView.Renderer
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m sync.Mutex
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}
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func SetGame(game game) {
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theState.m.Lock()
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defer theState.m.Unlock()
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theState.game = game
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}
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//export ebitenLayout
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func ebitenLayout(viewWidth, viewHeight C.int, x, y, width, height *C.int) {
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theState.m.Lock()
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defer theState.m.Unlock()
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if theState.game == nil {
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panic("ebitenmobileview: SetGame must be called before ebitenLayout")
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}
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w, h := theState.game.Layout(int(viewWidth), int(viewHeight))
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scaleX := float64(viewWidth) / float64(w)
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scaleY := float64(viewHeight) / float64(h)
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scale := math.Min(scaleX, scaleY)
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*width = C.int(math.Ceil(float64(w) * scale))
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*height = C.int(math.Ceil(float64(h) * scale))
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*x = (viewWidth - *width) / 2
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*y = (viewHeight - *height) / 2
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if !theState.running {
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start(theState.game.Update, w, h, scale)
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theState.running = true
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}
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// TODO: call SetScreenSize
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}
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//export ebitenUpdate
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func ebitenUpdate() *C.char {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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theState.m.Lock()
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defer theState.m.Unlock()
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if err := update(); err != nil {
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// TODO: When to free cstr?
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cstr := C.CString(err.Error())
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return cstr
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}
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return nil
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}
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//export ebitenUpdateTouchesOnIOS
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func ebitenUpdateTouchesOnIOS(phase C.int, ptr C.uintptr_t, x, y C.int) {
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theState.m.Lock()
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defer theState.m.Unlock()
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updateTouchesOnIOSImpl(int(phase), int64(ptr), int(x), int(y))
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}
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//export ebitenUpdateTouchesOnAndroid
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func ebitenUpdateTouchesOnAndroid(action C.int, id C.int, x, y C.int) {
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theState.m.Lock()
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defer theState.m.Unlock()
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updateTouchesOnAndroid(int(action), int(id), int(x), int(y))
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}
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