ebiten/internal/ui/monitor_glfw.go

112 lines
2.5 KiB
Go

// Copyright 2023 The Ebitengine 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.
//go:build !android && !ios && !js && !nintendosdk
package ui
import (
"sync"
"sync/atomic"
"github.com/hajimehoshi/ebiten/v2/internal/devicescale"
"github.com/hajimehoshi/ebiten/v2/internal/glfw"
)
// Monitor is a wrapper around glfw.Monitor.
type Monitor struct {
m *glfw.Monitor
videoMode *glfw.VidMode
id int
name string
x int
y int
videoModeScale float64
}
// Name returns the monitor's name.
func (m *Monitor) Name() string {
return m.name
}
type monitors struct {
// monitors is the monitor list cache for desktop glfw compile targets.
// populated by 'updateMonitors' which is called on init and every
// monitor config change event.
monitors []*Monitor
m sync.Mutex
updateCalled int32
}
var theMonitors monitors
func (m *monitors) append(ms []*Monitor) []*Monitor {
if atomic.LoadInt32(&m.updateCalled) == 0 {
panic("ui: (*monitors).update must be called before (*monitors).append is called")
}
m.m.Lock()
defer m.m.Unlock()
return append(ms, m.monitors...)
}
func (m *monitors) monitorFromGLFWMonitor(glfwMonitor *glfw.Monitor) *Monitor {
m.m.Lock()
defer m.m.Unlock()
for _, m := range m.monitors {
if m.m == glfwMonitor {
return m
}
}
return nil
}
func (m *monitors) monitorFromID(id int) *Monitor {
m.m.Lock()
defer m.m.Unlock()
return m.monitors[id]
}
// update must be called from the main thread.
func (m *monitors) update() {
glfwMonitors := glfw.GetMonitors()
newMonitors := make([]*Monitor, 0, len(glfwMonitors))
for i, m := range glfwMonitors {
x, y := m.GetPos()
newMonitors = append(newMonitors, &Monitor{
m: m,
videoMode: m.GetVideoMode(),
id: i,
name: m.GetName(),
x: x,
y: y,
videoModeScale: videoModeScale(m),
})
}
m.m.Lock()
m.monitors = newMonitors
m.m.Unlock()
devicescale.ClearCache()
atomic.StoreInt32(&m.updateCalled, 1)
}