ebiten/internal/ui/ui_glfw_unix.go

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// Copyright 2016 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.
//go:build !android && !darwin && !js && !windows && !ebitenginecbackend && !ebitencbackend
// +build !android,!darwin,!js,!windows,!ebitenginecbackend,!ebitencbackend
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package ui
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import (
"fmt"
"math"
"runtime"
"github.com/jezek/xgb"
"github.com/jezek/xgb/randr"
"github.com/jezek/xgb/xproto"
"github.com/hajimehoshi/ebiten/v2/internal/glfw"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl"
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)
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type graphicsDriverCreatorImpl struct {
transparent bool
}
func (g *graphicsDriverCreatorImpl) newAuto() (graphicsdriver.Graphics, error) {
return g.newOpenGL()
}
func (*graphicsDriverCreatorImpl) newOpenGL() (graphicsdriver.Graphics, error) {
return opengl.NewGraphics()
}
func (*graphicsDriverCreatorImpl) newDirectX() (graphicsdriver.Graphics, error) {
return nil, nil
}
func (*graphicsDriverCreatorImpl) newMetal() (graphicsdriver.Graphics, error) {
return nil, nil
}
type videoModeScaleCacheKey struct{ X, Y int }
var videoModeScaleCache = map[videoModeScaleCacheKey]float64{}
// clearVideoModeScaleCache must be called from the main thread.
func clearVideoModeScaleCache() {
for k := range videoModeScaleCache {
delete(videoModeScaleCache, k)
}
}
// videoModeScale must be called from the main thread.
func videoModeScale(m *glfw.Monitor) float64 {
if m == nil {
return 1
}
// Caching wrapper for videoModeScaleUncached as
// videoModeScaleUncached may be expensive (uses blocking calls on X connection)
// and public ScreenSizeInFullscreen API needs the videoModeScale.
monitorX, monitorY := m.GetPos()
cacheKey := videoModeScaleCacheKey{X: monitorX, Y: monitorY}
if cached, ok := videoModeScaleCache[cacheKey]; ok {
return cached
}
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scale := videoModeScaleUncached(m)
videoModeScaleCache[cacheKey] = scale
return scale
}
// videoModeScaleUncached must be called from the main thread.
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func videoModeScaleUncached(m *glfw.Monitor) float64 {
// TODO: if glfw/glfw#1961 gets fixed, this function may need revising.
// In case GLFW decides to switch to returning logical pixels, we can just return 1.
// Note: GLFW currently returns physical pixel sizes,
// but we need to predict the window system-side size of the fullscreen window
// for Ebiten's `ScreenSizeInFullscreen` public API.
// Also at the moment we need this prior to switching to fullscreen, but that might be replacable.
// So this function computes the ratio of physical per logical pixels.
xconn, err := xgb.NewConn()
if err != nil {
// No X11 connection?
// Assume we're on pure Wayland then.
// GLFW/Wayland shouldn't be having this issue.
return 1
}
defer xconn.Close()
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if err := randr.Init(xconn); err != nil {
// No RANDR extension? No problem.
return 1
}
root := xproto.Setup(xconn).DefaultScreen(xconn).Root
res, err := randr.GetScreenResourcesCurrent(xconn, root).Reply()
if err != nil {
// Likely means RANDR is not working. No problem.
return 1
}
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monitorX, monitorY := m.GetPos()
for _, crtc := range res.Crtcs[:res.NumCrtcs] {
info, err := randr.GetCrtcInfo(xconn, crtc, res.ConfigTimestamp).Reply()
if err != nil {
// This Crtc is bad. Maybe just got disconnected?
continue
}
if info.NumOutputs == 0 {
// This Crtc is not connected to any output.
// In other words, a disabled monitor.
continue
}
if int(info.X) == monitorX && int(info.Y) == monitorY {
xWidth, xHeight := info.Width, info.Height
vm := m.GetVideoMode()
physWidth, physHeight := vm.Width, vm.Height
// Return one scale, even though there may be separate X and Y scales.
// Return the _larger_ scale, as this would yield a letterboxed display on mismatch, rather than a cut-off one.
scale := math.Max(float64(physWidth)/float64(xWidth), float64(physHeight)/float64(xHeight))
return scale
}
}
// Monitor not known to XRandR. Weird.
return 1
}
// dipFromGLFWMonitorPixel must be called from the main thread.
func (u *userInterfaceImpl) dipFromGLFWMonitorPixel(x float64, monitor *glfw.Monitor) float64 {
return x / (videoModeScale(monitor) * u.deviceScaleFactor(monitor))
}
// dipFromGLFWPixel must be called from the main thread.
func (u *userInterfaceImpl) dipFromGLFWPixel(x float64, monitor *glfw.Monitor) float64 {
return x / u.deviceScaleFactor(monitor)
}
// dipToGLFWPixel must be called from the main thread.
func (u *userInterfaceImpl) dipToGLFWPixel(x float64, monitor *glfw.Monitor) float64 {
return x * u.deviceScaleFactor(monitor)
}
func (u *userInterfaceImpl) adjustWindowPosition(x, y int, monitor *glfw.Monitor) (int, int) {
return x, y
}
func initialMonitorByOS() (*glfw.Monitor, error) {
xconn, err := xgb.NewConn()
if err != nil {
// Assume we're on pure Wayland then.
return nil, nil
}
defer xconn.Close()
root := xproto.Setup(xconn).DefaultScreen(xconn).Root
rep, err := xproto.QueryPointer(xconn, root).Reply()
if err != nil {
return nil, err
}
x, y := int(rep.RootX), int(rep.RootY)
// Find the monitor including the cursor.
for _, m := range ensureMonitors() {
w, h := m.vm.Width, m.vm.Height
if x >= m.x && x < m.x+w && y >= m.y && y < m.y+h {
return m.m, nil
}
}
return nil, nil
}
func monitorFromWindowByOS(_ *glfw.Window) *glfw.Monitor {
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// TODO: Implement this correctly. (#1119).
return nil
}
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func (u *userInterfaceImpl) nativeWindow() uintptr {
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// TODO: Implement this.
return 0
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}
func (u *userInterfaceImpl) isNativeFullscreen() bool {
return false
}
func (u *userInterfaceImpl) setNativeCursor(shape CursorShape) {
// TODO: Use native API in the future (#1571)
u.window.SetCursor(glfwSystemCursors[shape])
}
func (u *userInterfaceImpl) isNativeFullscreenAvailable() bool {
return false
}
func (u *userInterfaceImpl) setNativeFullscreen(fullscreen bool) {
panic(fmt.Sprintf("ui: setNativeFullscreen is not implemented in this environment: %s", runtime.GOOS))
}
func (u *userInterfaceImpl) adjustViewSize() {
}
func (u *userInterfaceImpl) setWindowResizingModeForOS(mode WindowResizingMode) {
}
func initializeWindowAfterCreation(w *glfw.Window) {
// Show the window once before getting the position of the window.
// On Linux/Unix, the window position is not reliable before showing.
w.Show()
// Hiding the window makes the position unreliable again. Do not call w.Hide() here (#1829)
// Calling Hide is problematic especially on XWayland and/or Sway.
// Apparently the window state is inconsistent just after the window is created, but we are not sure.
// For more details, see the discussion in #1829.
}
func (u *userInterfaceImpl) origWindowPosByOS() (int, int, bool) {
return 0, 0, false
}
func (u *userInterfaceImpl) setOrigWindowPosByOS(x, y int) bool {
return false
}