mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 21:17:27 +01:00
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
// Copyright 2022 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 ui
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import (
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"sync"
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"sync/atomic"
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)
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var theGlobalState = globalState{
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isScreenClearedEveryFrame_: 1,
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graphicsLibrary_: int32(GraphicsLibraryUnknown),
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}
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// globalState represents a global state in this package.
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// This is available even before the game loop starts.
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type globalState struct {
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err_ error
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errM sync.Mutex
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fpsMode_ int32
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isScreenClearedEveryFrame_ int32
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graphicsLibrary_ int32
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}
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func (g *globalState) error() error {
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g.errM.Lock()
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defer g.errM.Unlock()
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return g.err_
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}
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func (g *globalState) setError(err error) {
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g.errM.Lock()
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defer g.errM.Unlock()
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if g.err_ == nil {
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g.err_ = err
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}
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}
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func (g *globalState) fpsMode() FPSModeType {
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return FPSModeType(atomic.LoadInt32(&g.fpsMode_))
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}
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func (g *globalState) setFPSMode(fpsMode FPSModeType) {
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atomic.StoreInt32(&g.fpsMode_, int32(fpsMode))
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}
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func (g *globalState) isScreenClearedEveryFrame() bool {
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return atomic.LoadInt32(&g.isScreenClearedEveryFrame_) != 0
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}
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func (g *globalState) setScreenClearedEveryFrame(cleared bool) {
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v := int32(0)
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if cleared {
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v = 1
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}
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atomic.StoreInt32(&g.isScreenClearedEveryFrame_, v)
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}
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func (g *globalState) setGraphicsLibrary(library GraphicsLibrary) {
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atomic.StoreInt32(&g.graphicsLibrary_, int32(library))
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}
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func (g *globalState) graphicsLibrary() GraphicsLibrary {
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return GraphicsLibrary(atomic.LoadInt32(&g.graphicsLibrary_))
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}
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func FPSMode() FPSModeType {
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return theGlobalState.fpsMode()
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}
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func SetFPSMode(fpsMode FPSModeType) {
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theGlobalState.setFPSMode(fpsMode)
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theUI.SetFPSMode(fpsMode)
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}
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func IsScreenClearedEveryFrame() bool {
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return theGlobalState.isScreenClearedEveryFrame()
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}
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func SetScreenClearedEveryFrame(cleared bool) {
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theGlobalState.setScreenClearedEveryFrame(cleared)
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}
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func GetGraphicsLibrary() GraphicsLibrary {
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return theGlobalState.graphicsLibrary()
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}
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