/
ui.go
1540 lines (1341 loc) · 38.6 KB
/
ui.go
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// 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 darwin freebsd linux windows
// +build !android
// +build !ios
package glfw
import (
"fmt"
"image"
"os"
"runtime"
"sync"
"sync/atomic"
"time"
"github.com/hajimehoshi/ebiten/v2/internal/devicescale"
"github.com/hajimehoshi/ebiten/v2/internal/driver"
"github.com/hajimehoshi/ebiten/v2/internal/glfw"
"github.com/hajimehoshi/ebiten/v2/internal/hooks"
"github.com/hajimehoshi/ebiten/v2/internal/thread"
)
func driverCursorModeToGLFWCursorMode(mode driver.CursorMode) int {
switch mode {
case driver.CursorModeVisible:
return glfw.CursorNormal
case driver.CursorModeHidden:
return glfw.CursorHidden
case driver.CursorModeCaptured:
return glfw.CursorDisabled
default:
panic(fmt.Sprintf("glfw: invalid driver.CursorMode: %d", mode))
}
}
type UserInterface struct {
context driver.UIContext
title string
window *glfw.Window
// windowWidth and windowHeight represents a window size.
// The units are device-dependent pixels.
windowWidth int
windowHeight int
// The units are device-independent pixels.
minWindowWidthInDP int
minWindowHeightInDP int
maxWindowWidthInDP int
maxWindowHeightInDP int
running uint32
toChangeSize bool
origPosX int
origPosY int
runnableOnUnfocused bool
vsync bool
iconImages []image.Image
cursorShape driver.CursorShape
// setSizeCallbackEnabled must be accessed from the main thread.
setSizeCallbackEnabled bool
// err must be accessed from the main thread.
err error
lastDeviceScaleFactor float64
// These values are not changed after initialized.
// TODO: the fullscreen size should be updated when the initial window position is changed?
initMonitor *glfw.Monitor
initFullscreenWidthInDP int
initFullscreenHeightInDP int
initTitle string
initVsync bool
initFullscreen bool
initCursorMode driver.CursorMode
initWindowDecorated bool
initWindowResizable bool
initWindowPositionXInDP int
initWindowPositionYInDP int
initWindowWidthInDP int
initWindowHeightInDP int
initWindowFloating bool
initWindowMaximized bool
initScreenTransparent bool
initFocused bool
vsyncInited bool
input Input
iwindow window
t thread.Thread
m sync.RWMutex
}
const (
maxInt = int(^uint(0) >> 1)
minInt = -maxInt - 1
invalidPos = minInt
)
var (
theUI = &UserInterface{
runnableOnUnfocused: true,
minWindowWidthInDP: glfw.DontCare,
minWindowHeightInDP: glfw.DontCare,
maxWindowWidthInDP: glfw.DontCare,
maxWindowHeightInDP: glfw.DontCare,
origPosX: invalidPos,
origPosY: invalidPos,
initVsync: true,
initCursorMode: driver.CursorModeVisible,
initWindowDecorated: true,
initWindowPositionXInDP: invalidPos,
initWindowPositionYInDP: invalidPos,
initWindowWidthInDP: 640,
initWindowHeightInDP: 480,
initFocused: true,
vsync: true,
}
)
func init() {
theUI.input.ui = theUI
theUI.iwindow.ui = theUI
}
func Get() *UserInterface {
return theUI
}
func init() {
hideConsoleWindowOnWindows()
if err := initialize(); err != nil {
panic(err)
}
glfw.SetMonitorCallback(func(monitor *glfw.Monitor, event glfw.PeripheralEvent) {
cacheMonitors()
})
cacheMonitors()
}
var glfwSystemCursors = map[driver.CursorShape]*glfw.Cursor{}
func initialize() error {
if err := glfw.Init(); err != nil {
return err
}
glfw.WindowHint(glfw.Visible, glfw.False)
glfw.WindowHint(glfw.ClientAPI, glfw.NoAPI)
// Create a window to set the initial monitor.
w, err := glfw.CreateWindow(16, 16, "", nil, nil)
if err != nil {
return err
}
if w == nil {
// This can happen on Windows Remote Desktop (#903).
panic("glfw: glfw.CreateWindow must not return nil")
}
defer w.Destroy()
m := currentMonitor(w)
theUI.initMonitor = m
v := m.GetVideoMode()
scale := devicescale.GetAt(currentMonitor(w).GetPos())
theUI.initFullscreenWidthInDP = int(fromGLFWMonitorPixel(float64(v.Width), scale))
theUI.initFullscreenHeightInDP = int(fromGLFWMonitorPixel(float64(v.Height), scale))
// Create system cursors. These cursors are destroyed at glfw.Terminate().
glfwSystemCursors[driver.CursorShapeDefault] = nil
glfwSystemCursors[driver.CursorShapeText] = glfw.CreateStandardCursor(glfw.IBeamCursor)
glfwSystemCursors[driver.CursorShapeCrosshair] = glfw.CreateStandardCursor(glfw.CrosshairCursor)
glfwSystemCursors[driver.CursorShapePointer] = glfw.CreateStandardCursor(glfw.HandCursor)
glfwSystemCursors[driver.CursorShapeEWResize] = glfw.CreateStandardCursor(glfw.HResizeCursor)
glfwSystemCursors[driver.CursorShapeNSResize] = glfw.CreateStandardCursor(glfw.VResizeCursor)
return nil
}
type cachedMonitor struct {
m *glfw.Monitor
vm *glfw.VidMode
// Pos of monitor in virtual coords
x int
y int
}
// monitors is the monitor list cache for desktop glfw compile targets.
// populated by 'cacheMonitors' which is called on init and every
// monitor config change event.
//
// monitors must be manipulated on the main thread.
var monitors []*cachedMonitor
func cacheMonitors() {
monitors = nil
ms := glfw.GetMonitors()
for _, m := range ms {
x, y := m.GetPos()
monitors = append(monitors, &cachedMonitor{
m: m,
vm: m.GetVideoMode(),
x: x,
y: y,
})
}
}
// getCachedMonitor returns a monitor for the given window x/y,
// or returns nil if monitor is not found.
//
// getCachedMonitor must be called on the main thread.
func getCachedMonitor(wx, wy int) *cachedMonitor {
for _, m := range monitors {
if m.x <= wx && wx < m.x+m.vm.Width && m.y <= wy && wy < m.y+m.vm.Height {
return m
}
}
return nil
}
func (u *UserInterface) isRunning() bool {
return atomic.LoadUint32(&u.running) != 0
}
func (u *UserInterface) setRunning(running bool) {
if running {
atomic.StoreUint32(&u.running, 1)
} else {
atomic.StoreUint32(&u.running, 0)
}
}
func (u *UserInterface) getWindowSizeLimits() (minw, minh, maxw, maxh int) {
u.m.RLock()
defer u.m.RUnlock()
minw, minh, maxw, maxh = -1, -1, -1, -1
if u.minWindowWidthInDP >= 0 {
minw = int(u.toGLFWPixel(float64(u.minWindowWidthInDP)))
}
if u.minWindowHeightInDP >= 0 {
minh = int(u.toGLFWPixel(float64(u.minWindowHeightInDP)))
}
if u.maxWindowWidthInDP >= 0 {
maxw = int(u.toGLFWPixel(float64(u.maxWindowWidthInDP)))
}
if u.maxWindowHeightInDP >= 0 {
maxh = int(u.toGLFWPixel(float64(u.maxWindowHeightInDP)))
}
return
}
func (u *UserInterface) getWindowSizeLimitsInDP() (minw, minh, maxw, maxh int) {
u.m.RLock()
defer u.m.RUnlock()
return u.minWindowWidthInDP, u.minWindowHeightInDP, u.maxWindowWidthInDP, u.maxWindowHeightInDP
}
func (u *UserInterface) setWindowSizeLimitsInDP(minw, minh, maxw, maxh int) bool {
u.m.RLock()
defer u.m.RUnlock()
if u.minWindowWidthInDP == minw && u.minWindowHeightInDP == minh && u.maxWindowWidthInDP == maxw && u.maxWindowHeightInDP == maxh {
return false
}
u.minWindowWidthInDP = minw
u.minWindowHeightInDP = minh
u.maxWindowWidthInDP = maxw
u.maxWindowHeightInDP = maxh
return true
}
func (u *UserInterface) getInitTitle() string {
u.m.RLock()
v := u.initTitle
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitTitle(title string) {
u.m.RLock()
u.initTitle = title
u.m.RUnlock()
}
func (u *UserInterface) isInitVsyncEnabled() bool {
u.m.RLock()
v := u.initVsync
u.m.RUnlock()
return v
}
func (u *UserInterface) isInitFullscreen() bool {
u.m.RLock()
v := u.initFullscreen
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitFullscreen(initFullscreen bool) {
u.m.Lock()
u.initFullscreen = initFullscreen
u.m.Unlock()
}
func (u *UserInterface) getInitCursorMode() driver.CursorMode {
u.m.RLock()
v := u.initCursorMode
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitCursorMode(mode driver.CursorMode) {
u.m.Lock()
u.initCursorMode = mode
u.m.Unlock()
}
func (u *UserInterface) getCursorShape() driver.CursorShape {
u.m.RLock()
v := u.cursorShape
u.m.RUnlock()
return v
}
func (u *UserInterface) setCursorShape(shape driver.CursorShape) driver.CursorShape {
u.m.Lock()
old := u.cursorShape
u.cursorShape = shape
u.m.Unlock()
return old
}
func (u *UserInterface) isInitWindowDecorated() bool {
u.m.RLock()
v := u.initWindowDecorated
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitWindowDecorated(decorated bool) {
u.m.Lock()
u.initWindowDecorated = decorated
u.m.Unlock()
}
func (u *UserInterface) isRunnableOnUnfocused() bool {
u.m.RLock()
v := u.runnableOnUnfocused
u.m.RUnlock()
return v
}
func (u *UserInterface) setRunnableOnUnfocused(runnableOnUnfocused bool) {
u.m.Lock()
u.runnableOnUnfocused = runnableOnUnfocused
u.m.Unlock()
}
func (u *UserInterface) isInitWindowResizable() bool {
u.m.RLock()
v := u.initWindowResizable
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitWindowResizable(resizable bool) {
u.m.Lock()
u.initWindowResizable = resizable
u.m.Unlock()
}
func (u *UserInterface) isInitScreenTransparent() bool {
u.m.RLock()
v := u.initScreenTransparent
u.m.RUnlock()
return v
}
func (u *UserInterface) setInitScreenTransparent(transparent bool) {
u.m.RLock()
u.initScreenTransparent = transparent
u.m.RUnlock()
}
func (u *UserInterface) getIconImages() []image.Image {
u.m.RLock()
i := u.iconImages
u.m.RUnlock()
return i
}
func (u *UserInterface) setIconImages(iconImages []image.Image) {
u.m.Lock()
u.iconImages = iconImages
u.m.Unlock()
}
func (u *UserInterface) getInitWindowPosition() (int, int) {
u.m.RLock()
defer u.m.RUnlock()
if u.initWindowPositionXInDP != invalidPos && u.initWindowPositionYInDP != invalidPos {
return u.initWindowPositionXInDP, u.initWindowPositionYInDP
}
return invalidPos, invalidPos
}
func (u *UserInterface) setInitWindowPosition(x, y int) {
u.m.Lock()
defer u.m.Unlock()
u.initWindowPositionXInDP = x
u.initWindowPositionYInDP = y
}
func (u *UserInterface) getInitWindowSize() (int, int) {
u.m.Lock()
w, h := u.initWindowWidthInDP, u.initWindowHeightInDP
u.m.Unlock()
return w, h
}
func (u *UserInterface) setInitWindowSize(width, height int) {
u.m.Lock()
u.initWindowWidthInDP, u.initWindowHeightInDP = width, height
u.m.Unlock()
}
func (u *UserInterface) isInitWindowFloating() bool {
u.m.Lock()
f := u.initWindowFloating
u.m.Unlock()
return f
}
func (u *UserInterface) setInitWindowFloating(floating bool) {
u.m.Lock()
u.initWindowFloating = floating
u.m.Unlock()
}
func (u *UserInterface) isInitWindowMaximized() bool {
u.m.Lock()
f := u.initWindowMaximized
u.m.Unlock()
return f
}
func (u *UserInterface) setInitWindowMaximized(floating bool) {
u.m.Lock()
u.initWindowMaximized = floating
u.m.Unlock()
}
func (u *UserInterface) isInitFocused() bool {
u.m.Lock()
v := u.initFocused
u.m.Unlock()
return v
}
func (u *UserInterface) setInitFocused(focused bool) {
u.m.Lock()
u.initFocused = focused
u.m.Unlock()
}
func (u *UserInterface) ScreenSizeInFullscreen() (int, int) {
if !u.isRunning() {
return u.initFullscreenWidthInDP, u.initFullscreenHeightInDP
}
var w, h int
_ = u.t.Call(func() error {
v := currentMonitor(u.window).GetVideoMode()
s := u.deviceScaleFactor()
w = int(fromGLFWMonitorPixel(float64(v.Width), s))
h = int(fromGLFWMonitorPixel(float64(v.Height), s))
return nil
})
return w, h
}
// isFullscreen must be called from the main thread.
func (u *UserInterface) isFullscreen() bool {
if !u.isRunning() {
panic("glfw: isFullscreen can't be called before the main loop starts")
}
return u.window.GetMonitor() != nil
}
func (u *UserInterface) IsFullscreen() bool {
if !u.isRunning() {
return u.isInitFullscreen()
}
b := false
_ = u.t.Call(func() error {
b = u.isFullscreen()
return nil
})
return b
}
func (u *UserInterface) SetFullscreen(fullscreen bool) {
if !u.isRunning() {
u.setInitFullscreen(fullscreen)
return
}
var update bool
_ = u.t.Call(func() error {
update = u.isFullscreen() != fullscreen
return nil
})
if !update {
return
}
_ = u.t.Call(func() error {
if u.isNativeFullscreen() {
return nil
}
w, h := u.windowWidth, u.windowHeight
u.setWindowSize(w, h, fullscreen)
return nil
})
}
func (u *UserInterface) IsFocused() bool {
if !u.isRunning() {
return false
}
var focused bool
_ = u.t.Call(func() error {
focused = u.window.GetAttrib(glfw.Focused) == glfw.True
return nil
})
return focused
}
func (u *UserInterface) SetRunnableOnUnfocused(runnableOnUnfocused bool) {
u.setRunnableOnUnfocused(runnableOnUnfocused)
}
func (u *UserInterface) IsRunnableOnUnfocused() bool {
return u.isRunnableOnUnfocused()
}
func (u *UserInterface) SetVsyncEnabled(enabled bool) {
if !u.isRunning() {
// In general, m is used for locking init* values.
// m is not used for updating vsync in setWindowSize so far, but
// it should be OK since any goroutines can't reach here when
// the game already starts and setWindowSize can be called.
u.m.Lock()
u.initVsync = enabled
u.m.Unlock()
return
}
_ = u.t.Call(func() error {
if !u.vsyncInited {
u.m.Lock()
u.initVsync = enabled
u.m.Unlock()
return nil
}
u.vsync = enabled
u.updateVsync()
return nil
})
}
func (u *UserInterface) IsVsyncEnabled() bool {
if !u.isRunning() {
return u.isInitVsyncEnabled()
}
var v bool
_ = u.t.Call(func() error {
if !u.vsyncInited {
v = u.isInitVsyncEnabled()
return nil
}
v = u.vsync
return nil
})
return v
}
func (u *UserInterface) CursorMode() driver.CursorMode {
if !u.isRunning() {
return u.getInitCursorMode()
}
var v driver.CursorMode
_ = u.t.Call(func() error {
mode := u.window.GetInputMode(glfw.CursorMode)
switch mode {
case glfw.CursorNormal:
v = driver.CursorModeVisible
case glfw.CursorHidden:
v = driver.CursorModeHidden
case glfw.CursorDisabled:
v = driver.CursorModeCaptured
default:
panic(fmt.Sprintf("glfw: invalid GLFW cursor mode: %d", mode))
}
return nil
})
return v
}
func (u *UserInterface) SetCursorMode(mode driver.CursorMode) {
if !u.isRunning() {
u.setInitCursorMode(mode)
return
}
_ = u.t.Call(func() error {
u.window.SetInputMode(glfw.CursorMode, driverCursorModeToGLFWCursorMode(mode))
return nil
})
}
func (u *UserInterface) CursorShape() driver.CursorShape {
return u.getCursorShape()
}
func (u *UserInterface) SetCursorShape(shape driver.CursorShape) {
old := u.setCursorShape(shape)
if old == shape {
return
}
if !u.isRunning() {
return
}
_ = u.t.Call(func() error {
u.setNativeCursor(shape)
return nil
})
}
func (u *UserInterface) DeviceScaleFactor() float64 {
if !u.isRunning() {
// TODO: Use the initWindowPosition. This requires to convert the units correctly (#1575).
return devicescale.GetAt(u.initMonitor.GetPos())
}
f := 0.0
_ = u.t.Call(func() error {
f = u.deviceScaleFactor()
return nil
})
return f
}
// deviceScaleFactor must be called from the main thread.
func (u *UserInterface) deviceScaleFactor() float64 {
m := u.initMonitor
if u.window != nil {
m = currentMonitor(u.window)
}
return devicescale.GetAt(m.GetPos())
}
func init() {
// Lock the main thread.
runtime.LockOSThread()
}
func (u *UserInterface) RunWithoutMainLoop(context driver.UIContext) {
panic("glfw: RunWithoutMainLoop is not implemented")
}
// createWindow creates a GLFW window.
//
// createWindow must be called from the main thread.
//
// createWindow does not set the position or size so far.
func (u *UserInterface) createWindow() error {
if u.window != nil {
panic("glfw: u.window must not exist at createWindow")
}
// As a start, create a window with temporary size to create OpenGL context thread.
window, err := glfw.CreateWindow(16, 16, "", nil, nil)
if err != nil {
return err
}
u.window = window
if u.Graphics().IsGL() {
u.window.MakeContextCurrent()
}
u.window.SetInputMode(glfw.StickyMouseButtonsMode, glfw.True)
u.window.SetInputMode(glfw.StickyKeysMode, glfw.True)
u.window.SetInputMode(glfw.CursorMode, driverCursorModeToGLFWCursorMode(u.getInitCursorMode()))
u.window.SetCursor(glfwSystemCursors[u.getCursorShape()])
u.window.SetTitle(u.title)
// TODO: Set icons
u.registerWindowSetSizeCallback()
return nil
}
// registerWindowSetSizeCallback must be called from the main thread.
func (u *UserInterface) registerWindowSetSizeCallback() {
u.window.SetSizeCallback(func(_ *glfw.Window, width, height int) {
if !u.setSizeCallbackEnabled {
return
}
if u.window.GetAttrib(glfw.Resizable) == glfw.False {
return
}
if u.isFullscreen() {
return
}
if err := u.runOnAnotherThreadFromMainThread(func() error {
var outsideWidth, outsideHeight float64
var outsideSizeChanged bool
_ = u.t.Call(func() error {
if width != 0 || height != 0 {
u.setWindowSize(width, height, u.isFullscreen())
}
outsideWidth, outsideHeight, outsideSizeChanged = u.updateSize()
return nil
})
if outsideSizeChanged {
u.context.Layout(outsideWidth, outsideHeight)
}
if err := u.context.ForceUpdate(); err != nil {
return err
}
if u.Graphics().IsGL() {
_ = u.t.Call(func() error {
u.swapBuffers()
return nil
})
}
return nil
}); err != nil {
u.err = err
}
})
}
func (u *UserInterface) init() error {
if u.Graphics().IsGL() {
glfw.WindowHint(glfw.ClientAPI, glfw.OpenGLAPI)
glfw.WindowHint(glfw.ContextVersionMajor, 2)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
} else {
glfw.WindowHint(glfw.ClientAPI, glfw.NoAPI)
}
decorated := glfw.False
if u.isInitWindowDecorated() {
decorated = glfw.True
}
glfw.WindowHint(glfw.Decorated, decorated)
transparent := glfw.False
if u.isInitScreenTransparent() {
transparent = glfw.True
}
glfw.WindowHint(glfw.TransparentFramebuffer, transparent)
u.Graphics().SetTransparent(u.isInitScreenTransparent())
resizable := glfw.False
if u.isInitWindowResizable() {
resizable = glfw.True
}
glfw.WindowHint(glfw.Resizable, resizable)
floating := glfw.False
if u.isInitWindowFloating() {
floating = glfw.True
}
glfw.WindowHint(glfw.Floating, floating)
focused := glfw.False
if u.isInitFocused() {
focused = glfw.True
}
glfw.WindowHint(glfw.FocusOnShow, focused)
// Set the window visible explicitly or the application freezes on Wayland (#974).
if os.Getenv("WAYLAND_DISPLAY") != "" {
glfw.WindowHint(glfw.Visible, glfw.True)
}
if err := u.createWindow(); err != nil {
return err
}
u.setSizeCallbackEnabled = true
setSize := func() {
ww, wh := u.getInitWindowSize()
ww = int(u.toGLFWPixel(float64(ww)))
wh = int(u.toGLFWPixel(float64(wh)))
u.setWindowSize(ww, wh, u.isFullscreen())
}
// Set the window size and the window position in this order on Linux or other UNIX using X (#1118),
// but this should be inverted on Windows. This is very tricky, but there is no obvious way to solve
// this. This doesn't matter on macOS.
if runtime.GOOS == "windows" {
u.setWindowPosition(u.getInitWindowPosition())
setSize()
} else {
setSize()
u.setWindowPosition(u.getInitWindowPosition())
}
u.updateWindowSizeLimits()
// Maximizing a window requires a proper size and position. Call Maximize here (#1117).
if u.isInitWindowMaximized() {
u.window.Maximize()
}
u.title = u.getInitTitle()
u.window.SetTitle(u.title)
u.window.Show()
if g, ok := u.Graphics().(interface{ SetWindow(uintptr) }); ok {
g.SetWindow(u.nativeWindow())
}
return nil
}
func (u *UserInterface) updateSize() (float64, float64, bool) {
ww, wh := u.windowWidth, u.windowHeight
u.setWindowSize(ww, wh, u.isFullscreen())
if !u.toChangeSize {
return 0, 0, false
}
u.toChangeSize = false
var w, h float64
if u.isFullscreen() {
v := currentMonitor(u.window).GetVideoMode()
ww, wh := v.Width, v.Height
s := u.deviceScaleFactor()
w = fromGLFWMonitorPixel(float64(ww), s)
h = fromGLFWMonitorPixel(float64(wh), s)
} else {
// Instead of u.windowWidth and u.windowHeight, use the actual window size here.
// On Windows, the specified size at SetSize and the actual window size might not
// match (#1163).
ww, wh := u.window.GetSize()
w = u.fromGLFWPixel(float64(ww))
h = u.fromGLFWPixel(float64(wh))
}
// On Linux/UNIX, further adjusting is required (#1307).
w = u.toFramebufferPixel(w)
h = u.toFramebufferPixel(h)
return w, h, true
}
// update must be called from the main thread.
func (u *UserInterface) update() (float64, float64, bool, error) {
if u.err != nil {
return 0, 0, false, u.err
}
if u.window.ShouldClose() {
return 0, 0, false, driver.RegularTermination
}
if u.isInitFullscreen() {
w, h := u.window.GetSize()
u.setWindowSize(w, h, true)
u.setInitFullscreen(false)
}
// Initialize vsync after SetMonitor is called. See the comment in updateVsync.
// Calling this inside setWindowSize didn't work (#1363).
if !u.vsyncInited {
u.vsync = u.isInitVsyncEnabled()
u.updateVsync()
u.vsyncInited = true
}
outsideWidth, outsideHeight, outsideSizeChanged := u.updateSize()
// TODO: Updating the input can be skipped when clock.Update returns 0 (#1367).
glfw.PollEvents()
u.input.update(u.window, u.context)
for !u.isRunnableOnUnfocused() && u.window.GetAttrib(glfw.Focused) == 0 && !u.window.ShouldClose() {
if err := hooks.SuspendAudio(); err != nil {
return 0, 0, false, err
}
// Wait for an arbitrary period to avoid busy loop.
time.Sleep(time.Second / 60)
glfw.PollEvents()
}
if err := hooks.ResumeAudio(); err != nil {
return 0, 0, false, err
}
return outsideWidth, outsideHeight, outsideSizeChanged, nil
}
func (u *UserInterface) loop() error {
defer func() {
_ = u.t.Call(func() error {
glfw.Terminate()
return nil
})
}()
for {
var unfocused bool
// On Windows, the focusing state might be always false (#987).
// On Windows, even if a window is in another workspace, vsync seems to work.
// Then let's assume the window is always 'focused' as a workaround.
if runtime.GOOS != "windows" {
unfocused = u.window.GetAttrib(glfw.Focused) == glfw.False
}
var t1, t2 time.Time
if unfocused {
t1 = time.Now()
}
var outsideWidth, outsideHeight float64
var outsideSizeChanged bool
if err := u.t.Call(func() error {
var err error
outsideWidth, outsideHeight, outsideSizeChanged, err = u.update()
return err
}); err != nil {
return err
}
if outsideSizeChanged {
u.context.Layout(outsideWidth, outsideHeight)
}
if err := u.context.Update(); err != nil {
return err
}
// Create icon images in a different goroutine (#1478).
// In the fullscreen mode, SetIcon fails (#1578).
if imgs := u.getIconImages(); len(imgs) > 0 && !u.isFullscreen() {
u.setIconImages(imgs[:0])
// Convert the icons in the different goroutine, as (*ebiten.Image).At cannot be invoked
// from this goroutine. At works only in between BeginFrame and EndFrame.
go func() {
newImgs := make([]image.Image, len(imgs))
for i, img := range imgs {
// TODO: If img is not *ebiten.Image, this converting is not necessary.
// However, this package cannot refer *ebiten.Image due to the package
// dependencies.
b := img.Bounds()
rgba := image.NewRGBA(b)
for j := b.Min.Y; j < b.Max.Y; j++ {
for i := b.Min.X; i < b.Max.X; i++ {
rgba.Set(i, j, img.At(i, j))
}
}
newImgs[i] = rgba
}
_ = u.t.Call(func() error {
// In the fullscreen mode, reset the icon images and try again later.
if u.isFullscreen() {