ebiten/internal/buffered/command.go

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// Copyright 2019 The Ebiten Authors
//
// 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.
package buffered
import (
"sync"
)
type command struct {
f func()
}
var (
delayedCommandsFlushable bool
// delayedCommands represents a queue for image operations that are ordered before the game starts
// (BeginFrame). Before the game starts, the package shareable doesn't determine the minimum/maximum texture
// sizes (#879).
//
// TODO: Flush the commands only when necessary (#921).
delayedCommands []*command
delayedCommandsM sync.Mutex
)
func makeDelayedCommandFlushable() {
delayedCommandsM.Lock()
delayedCommandsFlushable = true
delayedCommandsM.Unlock()
}
func enqueueDelayedCommand(f func()) {
delayedCommandsM.Lock()
delayedCommands = append(delayedCommands, &command{
f: f,
})
delayedCommandsM.Unlock()
}
func flushDelayedCommands() bool {
delayedCommandsM.Lock()
defer delayedCommandsM.Unlock()
if !delayedCommandsFlushable {
return false
}
for _, c := range delayedCommands {
c.f()
}
delayedCommands = nil
return true
}