ebiten/examples/windowsize/main.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.
package main
import (
"bytes"
"flag"
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"fmt"
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"image"
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_ "image/jpeg"
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"log"
"math"
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"math/rand"
"regexp"
"strconv"
"strings"
"sync"
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"time"
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"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
"github.com/hajimehoshi/ebiten/v2/inpututil"
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)
var (
flagFullscreen = flag.Bool("fullscreen", false, "fullscreen")
flagResizable = flag.Bool("resizable", false, "make the window resizable")
flagWindowPosition = flag.String("windowposition", "", "window position (e.g., 100,200)")
flagTransparent = flag.Bool("transparent", false, "screen transparent")
flagAutoAdjusting = flag.Bool("autoadjusting", false, "make the game screen auto-adjusting")
flagFloating = flag.Bool("floating", false, "make the window floating")
flagMaximize = flag.Bool("maximize", false, "maximize the window")
flagVsync = flag.Bool("vsync", true, "enable vsync")
flagAutoRestore = flag.Bool("autorestore", false, "restore the window automatically")
flagInitFocused = flag.Bool("initfocused", true, "whether the window is focused on start")
flagMinWindowSize = flag.String("minwindowsize", "", "minimum window size (e.g., 100x200)")
flagMaxWindowSize = flag.String("maxwindowsize", "", "maximium window size (e.g., 1920x1080)")
flagGraphicsLibrary = flag.String("graphicslibrary", "", "graphics library (e.g. opengl)")
flagRunnableOnUnfocused = flag.Bool("runnableonunfocused", true, "whether the app is runnable even on unfocused")
)
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func init() {
flag.Parse()
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rand.Seed(time.Now().UnixNano())
}
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const (
initScreenWidth = 480
initScreenHeight = 480
initScreenScale = 1
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)
var (
gophersImage *ebiten.Image
)
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func createRandomIconImage() image.Image {
const size = 32
rf := float64(rand.Intn(0x100))
gf := float64(rand.Intn(0x100))
bf := float64(rand.Intn(0x100))
img := ebiten.NewImage(size, size)
pix := make([]byte, 4*size*size)
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for j := 0; j < size; j++ {
for i := 0; i < size; i++ {
af := float64(i+j) / float64(2*size)
if af > 0 {
pix[4*(j*size+i)] = byte(rf * af)
pix[4*(j*size+i)+1] = byte(gf * af)
pix[4*(j*size+i)+2] = byte(bf * af)
pix[4*(j*size+i)+3] = byte(af * 0xff)
}
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}
}
img.WritePixels(pix)
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return img
}
type game struct {
count int
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width float64
height float64
transparent bool
logOnce sync.Once
}
func (g *game) Layout(outsideWidth, outsideHeight int) (int, int) {
// As game implements the interface LayoutFer, Layout is never called and LayoutF is called instead.
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// However, game has to implement Layout to satisfy the interface Game.
panic("windowsize: Layout must not be called")
}
func (g *game) LayoutF(outsideWidth, outsideHeight float64) (float64, float64) {
if *flagAutoAdjusting {
g.width, g.height = outsideWidth, outsideHeight
return outsideWidth, outsideHeight
}
// Ignore the outside size. This means that the offscreen is not adjusted with the outside world.
return g.width, g.height
}
func (g *game) Update() error {
g.logOnce.Do(func() {
var debug ebiten.DebugInfo
ebiten.ReadDebugInfo(&debug)
fmt.Printf("Graphics library: %s\n", debug.GraphicsLibrary)
})
var (
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screenWidth float64
screenHeight float64
screenScale float64
)
screenWidth = g.width
screenHeight = g.height
if ww, wh := ebiten.WindowSize(); ww > 0 && wh > 0 {
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screenScale = math.Min(float64(ww)/g.width, float64(wh)/g.height)
} else {
// ebiten.WindowSize can return (0, 0) on browsers or mobiles.
screenScale = 1
}
fullscreen := ebiten.IsFullscreen()
runnableOnUnfocused := ebiten.IsRunnableOnUnfocused()
cursorMode := ebiten.CursorMode()
vsyncEnabled := ebiten.IsVsyncEnabled()
tps := ebiten.TPS()
decorated := ebiten.IsWindowDecorated()
positionX, positionY := ebiten.WindowPosition()
g.transparent = ebiten.IsScreenTransparent()
floating := ebiten.IsWindowFloating()
resizingMode := ebiten.WindowResizingMode()
screenCleared := ebiten.IsScreenClearedEveryFrame()
mousePassthrough := ebiten.IsWindowMousePassthrough()
const d = 16
toUpdateWindowSize := false
toUpdateWindowPosition := false
if ebiten.IsKeyPressed(ebiten.KeyShift) {
if inpututil.IsKeyJustPressed(ebiten.KeyArrowDown) {
screenHeight += d
toUpdateWindowSize = true
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}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowUp) {
if 16 < screenHeight && d < screenHeight {
screenHeight -= d
toUpdateWindowSize = true
}
}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowLeft) {
if 16 < screenWidth && d < screenWidth {
screenWidth -= d
toUpdateWindowSize = true
}
}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowRight) {
screenWidth += d
toUpdateWindowSize = true
}
} else {
if inpututil.IsKeyJustPressed(ebiten.KeyArrowUp) {
positionY -= d
toUpdateWindowPosition = true
}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowDown) {
positionY += d
toUpdateWindowPosition = true
}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowLeft) {
positionX -= d
toUpdateWindowPosition = true
}
if inpututil.IsKeyJustPressed(ebiten.KeyArrowRight) {
positionX += d
toUpdateWindowPosition = true
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}
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}
if inpututil.IsKeyJustPressed(ebiten.KeyS) && !*flagAutoAdjusting {
switch {
case screenScale < 1:
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screenScale = 1
case screenScale < 1.5:
screenScale = 1.5
case screenScale < 2:
screenScale = 2
default:
screenScale = 0.75
}
toUpdateWindowSize = true
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}
if inpututil.IsKeyJustPressed(ebiten.KeyF) {
fullscreen = !fullscreen
}
if inpututil.IsKeyJustPressed(ebiten.KeyU) {
runnableOnUnfocused = !runnableOnUnfocused
}
if inpututil.IsKeyJustPressed(ebiten.KeyC) {
switch cursorMode {
case ebiten.CursorModeVisible:
cursorMode = ebiten.CursorModeHidden
case ebiten.CursorModeHidden:
cursorMode = ebiten.CursorModeCaptured
case ebiten.CursorModeCaptured:
cursorMode = ebiten.CursorModeVisible
}
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}
if inpututil.IsKeyJustPressed(ebiten.KeyV) {
vsyncEnabled = !vsyncEnabled
}
if inpututil.IsKeyJustPressed(ebiten.KeyT) {
switch tps {
case ebiten.SyncWithFPS:
tps = 30
case 30:
tps = 60
case 60:
tps = 120
case 120:
tps = ebiten.SyncWithFPS
default:
panic("not reached")
}
}
if inpututil.IsKeyJustPressed(ebiten.KeyD) {
decorated = !decorated
}
if inpututil.IsKeyJustPressed(ebiten.KeyL) {
floating = !floating
}
if inpututil.IsKeyJustPressed(ebiten.KeyR) {
switch resizingMode {
case ebiten.WindowResizingModeDisabled:
resizingMode = ebiten.WindowResizingModeOnlyFullscreenEnabled
case ebiten.WindowResizingModeOnlyFullscreenEnabled:
resizingMode = ebiten.WindowResizingModeEnabled
case ebiten.WindowResizingModeEnabled:
resizingMode = ebiten.WindowResizingModeDisabled
default:
panic("not reached")
}
}
if inpututil.IsKeyJustPressed(ebiten.KeyW) {
screenCleared = !screenCleared
}
maximize := inpututil.IsKeyJustPressed(ebiten.KeyM)
minimize := inpututil.IsKeyJustPressed(ebiten.KeyN)
restore := false
if ebiten.IsWindowMaximized() || ebiten.IsWindowMinimized() {
if *flagAutoRestore {
restore = g.count%ebiten.TPS() == 0
} else {
restore = inpututil.IsKeyJustPressed(ebiten.KeyE)
}
}
if inpututil.IsKeyJustPressed(ebiten.KeyP) {
mousePassthrough = !mousePassthrough
}
if toUpdateWindowSize {
g.width = screenWidth
g.height = screenHeight
ebiten.SetWindowSize(int(float64(screenWidth)*screenScale), int(float64(screenHeight)*screenScale))
}
ebiten.SetFullscreen(fullscreen)
ebiten.SetRunnableOnUnfocused(runnableOnUnfocused)
ebiten.SetCursorMode(cursorMode)
// Set FPS mode enabled only when this is needed.
// This makes a bug around FPS mode initialization more explicit (#1364).
if vsyncEnabled != ebiten.IsVsyncEnabled() {
ebiten.SetVsyncEnabled(vsyncEnabled)
}
ebiten.SetTPS(tps)
ebiten.SetWindowDecorated(decorated)
if toUpdateWindowPosition {
ebiten.SetWindowPosition(positionX, positionY)
}
ebiten.SetWindowFloating(floating)
ebiten.SetScreenClearedEveryFrame(screenCleared)
if maximize && ebiten.WindowResizingMode() == ebiten.WindowResizingModeEnabled {
ebiten.MaximizeWindow()
}
if minimize {
ebiten.MinimizeWindow()
}
if restore {
ebiten.RestoreWindow()
}
ebiten.SetWindowResizingMode(resizingMode)
if inpututil.IsKeyJustPressed(ebiten.KeyI) {
ebiten.SetWindowIcon([]image.Image{createRandomIconImage()})
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}
if inpututil.IsKeyJustPressed(ebiten.KeyJ) {
ebiten.SetWindowIcon(nil)
}
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ebiten.SetWindowMousePassthrough(mousePassthrough)
g.count++
return nil
}
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func (g *game) Draw(screen *ebiten.Image) {
w, h := gophersImage.Bounds().Dx(), gophersImage.Bounds().Dy()
w2, h2 := screen.Bounds().Dx(), screen.Bounds().Dy()
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op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(-w+w2)/2, float64(-h+h2)/2)
dx := math.Cos(2*math.Pi*float64(g.count)/360) * 20
dy := math.Sin(2*math.Pi*float64(g.count)/360) * 20
op.GeoM.Translate(dx, dy)
screen.DrawImage(gophersImage, op)
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wx, wy := ebiten.WindowPosition()
ww, wh := ebiten.WindowSize()
minw, minh, maxw, maxh := ebiten.WindowSizeLimits()
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cx, cy := ebiten.CursorPosition()
tpsStr := "Sync with FPS"
if t := ebiten.TPS(); t != ebiten.SyncWithFPS {
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tpsStr = fmt.Sprintf("%d", t)
}
var lines []string
if !ebiten.IsWindowMaximized() && ebiten.WindowResizingMode() == ebiten.WindowResizingModeEnabled {
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lines = append(lines, "[M] Maximize the window (only for desktops)")
}
if !ebiten.IsWindowMinimized() {
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lines = append(lines, "[N] Minimize the window (only for desktops)")
}
if ebiten.IsWindowMaximized() || ebiten.IsWindowMinimized() {
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lines = append(lines, "[E] Restore the window from maximized/minimized state (only for desktops)")
}
msgM := strings.Join(lines, "\n")
msgR := "[R] Switch the window resizing mode (only for desktops)\n"
fg := "Yes"
if !ebiten.IsFocused() {
fg = "No"
}
msg := fmt.Sprintf(`[Arrow keys] Move the window
[Shift + Arrow keys] Change the window size
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%s
[F] Switch the fullscreen state
[U] Switch the runnable-on-unfocused state
[C] Switch the cursor mode (visible, hidden, or captured)
[I] Change the window icon (only for desktops)
[J] Reset the window icon (only for desktops)
[V] Switch the vsync
[T] Switch TPS (ticks per second)
[D] Switch the window decoration (only for desktops)
[L] Switch the window floating state (only for desktops)
[W] Switch whether to skip clearing the screen
[P] Switch whether a mouse cursor passthroughs the window (only for desktops)
%s
IsFocused?: %s
Window Position: (%d, %d)
Window Size: (%d, %d)
Window size limitation: (%d, %d) - (%d, %d)
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Cursor: (%d, %d)
TPS: Current: %0.2f / Max: %s
FPS: %0.2f
Device Scale Factor: %0.2f`, msgM, msgR, fg, wx, wy, ww, wh, minw, minh, maxw, maxh, cx, cy, ebiten.ActualTPS(), tpsStr, ebiten.ActualFPS(), ebiten.Monitor().DeviceScaleFactor())
ebitenutil.DebugPrint(screen, msg)
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}
func parseWindowPosition() (int, int, bool) {
if *flagWindowPosition == "" {
return 0, 0, false
}
tokens := strings.Split(*flagWindowPosition, ",")
if len(tokens) != 2 {
return 0, 0, false
}
x, err := strconv.Atoi(tokens[0])
if err != nil {
return 0, 0, false
}
y, err := strconv.Atoi(tokens[1])
if err != nil {
return 0, 0, false
}
return x, y, true
}
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func main() {
fmt.Printf("Device scale factor: %0.2f\n", ebiten.Monitor().DeviceScaleFactor())
w, h := ebiten.ScreenSizeInFullscreen()
fmt.Printf("Screen size in fullscreen: %d, %d\n", w, h)
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// Decode an image from the image file's byte slice.
img, _, err := image.Decode(bytes.NewReader(images.Gophers_jpg))
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if err != nil {
log.Fatal(err)
}
gophersImage = ebiten.NewImageFromImage(img)
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ebiten.SetWindowIcon([]image.Image{createRandomIconImage()})
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if x, y, ok := parseWindowPosition(); ok {
ebiten.SetWindowPosition(x, y)
}
g := &game{
width: initScreenWidth,
height: initScreenHeight,
}
if *flagFullscreen {
ebiten.SetFullscreen(true)
}
if *flagResizable {
ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
}
if *flagFloating {
ebiten.SetWindowFloating(true)
}
if *flagMaximize {
ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
ebiten.MaximizeWindow()
}
if !*flagVsync {
ebiten.SetVsyncEnabled(false)
}
if *flagAutoAdjusting {
ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
}
if !*flagRunnableOnUnfocused {
ebiten.SetRunnableOnUnfocused(false)
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}
minw, minh, maxw, maxh := -1, -1, -1, -1
reSize := regexp.MustCompile(`^(\d+)x(\d+)$`)
if m := reSize.FindStringSubmatch(*flagMinWindowSize); m != nil {
minw, _ = strconv.Atoi(m[1])
minh, _ = strconv.Atoi(m[2])
}
if m := reSize.FindStringSubmatch(*flagMaxWindowSize); m != nil {
maxw, _ = strconv.Atoi(m[1])
maxh, _ = strconv.Atoi(m[2])
}
if minw >= 0 || minh >= 0 || maxw >= 0 || maxh >= 0 {
ebiten.SetWindowSizeLimits(minw, minh, maxw, maxh)
ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
}
op := &ebiten.RunGameOptions{}
switch *flagGraphicsLibrary {
case "":
op.GraphicsLibrary = ebiten.GraphicsLibraryAuto
case "opengl":
op.GraphicsLibrary = ebiten.GraphicsLibraryOpenGL
case "directx":
op.GraphicsLibrary = ebiten.GraphicsLibraryDirectX
case "metal":
op.GraphicsLibrary = ebiten.GraphicsLibraryMetal
default:
log.Fatalf("unexpected graphics library: %s", *flagGraphicsLibrary)
}
op.InitUnfocused = !*flagInitFocused
op.ScreenTransparent = *flagTransparent
op.X11ClassName = "Window-Size"
op.X11InstanceName = "window-size"
const title = "Window Size (Ebitengine Demo)"
ww := int(float64(g.width) * initScreenScale)
wh := int(float64(g.height) * initScreenScale)
ebiten.SetWindowSize(ww, wh)
ebiten.SetWindowTitle(title)
if err := ebiten.RunGameWithOptions(g, op); err != nil {
log.Fatal(err)
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}
}