ebiten/run.go

490 lines
16 KiB
Go
Raw Normal View History

// Copyright 2014 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.
2014-12-09 15:16:04 +01:00
2014-12-14 08:53:32 +01:00
package ebiten
2014-12-06 17:09:59 +01:00
import (
2017-09-22 21:12:02 +02:00
"image"
2016-07-03 09:18:29 +02:00
"sync/atomic"
2017-08-05 19:15:27 +02:00
"github.com/hajimehoshi/ebiten/internal/clock"
"github.com/hajimehoshi/ebiten/internal/driver"
"github.com/hajimehoshi/ebiten/internal/ui"
"github.com/hajimehoshi/ebiten/internal/web"
)
var _ = __EBITEN_REQUIRES_GO_VERSION_1_11_OR_LATER__
// TPS represents a default ticks per second, that represents how many times game updating happens in a second.
const DefaultTPS = 60
2018-07-16 17:52:50 +02:00
// FPS is deprecated as of 1.8.0-alpha: Use DefaultTPS instead.
const FPS = DefaultTPS
2016-03-26 09:50:00 +01:00
2018-07-17 19:17:06 +02:00
// CurrentFPS returns the current number of FPS (frames per second), that represents
// how many swapping buffer happens per second.
2017-09-30 18:59:34 +02:00
//
// On some environments, CurrentFPS doesn't return a reliable value since vsync doesn't work well there.
// If you want to measure the application's speed, Use CurrentTPS.
//
// CurrentFPS is concurrent-safe.
2016-03-26 09:50:00 +01:00
func CurrentFPS() float64 {
2017-08-05 19:17:26 +02:00
return clock.CurrentFPS()
2016-03-26 09:50:00 +01:00
}
2016-07-03 09:18:29 +02:00
var (
isDrawingSkipped = int32(0)
currentMaxTPS = int32(DefaultTPS)
isRunning = int32(0)
2016-07-03 09:18:29 +02:00
)
func setDrawingSkipped(skipped bool) {
2016-07-03 09:18:29 +02:00
v := int32(0)
if skipped {
2016-07-03 09:18:29 +02:00
v = 1
}
atomic.StoreInt32(&isDrawingSkipped, v)
2016-07-03 09:18:29 +02:00
}
2018-07-11 04:06:18 +02:00
// IsDrawingSkipped returns true if rendering result is not adopted.
// It is recommended to skip drawing images or screen
// when IsDrawingSkipped is true.
2016-03-26 10:46:07 +01:00
//
// The typical code with IsDrawingSkipped is this:
2018-02-02 16:55:38 +01:00
//
// func update(screen *ebiten.Image) error {
//
// // Update the state.
//
// // When IsDrawingSkipped is true, the rendered result is not adopted.
// // Skip rendering then.
// if ebiten.IsDrawingSkipped() {
2018-02-02 16:55:38 +01:00
// return nil
// }
//
// // Draw something to the screen.
//
2018-02-02 16:55:38 +01:00
// return nil
// }
//
// IsDrawingSkipped is concurrent-safe.
func IsDrawingSkipped() bool {
return atomic.LoadInt32(&isDrawingSkipped) != 0
}
// IsRunningSlowly is deprecated as of 1.8.0-alpha.
// Use IsDrawingSkipped instead.
2016-03-26 09:50:00 +01:00
func IsRunningSlowly() bool {
return IsDrawingSkipped()
2016-03-26 09:50:00 +01:00
}
var theGraphicsContext atomic.Value
func run(width, height int, scale float64, title string, g *graphicsContext, mainloop bool) error {
atomic.StoreInt32(&isRunning, 1)
// On GopherJS, run returns immediately.
if !web.IsGopherJS() {
defer atomic.StoreInt32(&isRunning, 0)
}
if err := ui.Run(width, height, scale, title, g, mainloop, driver.Graphics()); err != nil {
if err == ui.RegularTermination {
2017-08-05 13:43:49 +02:00
return nil
}
return err
}
return nil
}
2016-03-26 09:50:00 +01:00
// Run runs the game.
// f is a function which is called at every frame.
// The argument (*Image) is the render target that represents the screen.
2017-09-30 18:59:34 +02:00
// The screen size is based on the given values (width and height).
//
// A window size is based on the given values (width, height and scale).
// scale is used to enlarge the screen.
2018-01-03 08:52:41 +01:00
// Note that the actual screen is multiplied not only by the given scale but also
// by the device scale on high-DPI display.
// If you pass inverse of the device scale,
// you can disable this automatical device scaling as a result.
// You can get the device scale by DeviceScaleFactor function.
2016-03-26 09:50:00 +01:00
//
// Run must be called on the main thread.
2017-09-30 18:59:34 +02:00
// Note that Ebiten bounds the main goroutine to the main OS thread by runtime.LockOSThread.
2016-03-26 09:50:00 +01:00
//
2019-01-13 15:25:32 +01:00
// Ebiten tries to call f 60 times a second by default. In other words,
// TPS (ticks per second) is 60 by default.
2018-07-15 21:39:05 +02:00
// This is not related to framerate (display's refresh rate).
2018-07-15 21:36:47 +02:00
//
2017-09-30 18:59:34 +02:00
// f is not called when the window is in background by default.
// This setting is configurable with SetRunnableInBackground.
//
2018-03-23 17:07:36 +01:00
// The given scale is ignored on fullscreen mode or gomobile-build mode.
2017-07-01 06:07:44 +02:00
//
// On non-GopherJS environments, Run returns error when 1) OpenGL error happens, 2) audio error happens or
// 3) f returns error. In the case of 3), Run returns the same error.
//
// On GopherJS, Run returns immediately.
2019-01-17 15:40:33 +01:00
// It is because the 'main' goroutine cannot be blocked on GopherJS due to the bug (gopherjs/gopherjs#826).
// When an error happens, this is shown as an error on the console.
2016-07-02 21:13:39 +02:00
//
// The size unit is device-independent pixel.
2017-09-30 18:59:34 +02:00
//
// Don't call Run twice or more in one process.
2016-06-18 19:59:17 +02:00
func Run(f func(*Image) error, width, height int, scale float64, title string) error {
f = (&imageDumper{f: f}).update
2016-05-06 05:23:48 +02:00
ch := make(chan error)
go func() {
2017-08-05 14:24:04 +02:00
defer close(ch)
2016-05-18 03:46:23 +02:00
g := newGraphicsContext(f)
theGraphicsContext.Store(g)
if err := run(width, height, scale, title, g, true); err != nil {
2017-08-05 14:24:04 +02:00
ch <- err
return
}
2016-05-06 05:23:48 +02:00
}()
// TODO: Use context in Go 1.7?
if err := ui.Loop(ch); err != nil {
2016-08-01 19:23:23 +02:00
return err
}
return nil
2016-05-06 05:23:48 +02:00
}
2016-05-18 18:49:57 +02:00
// RunWithoutMainLoop runs the game, but don't call the loop on the main (UI) thread.
// Different from Run, RunWithoutMainLoop returns immediately.
2016-05-18 18:49:57 +02:00
//
// Ebiten users should NOT call RunWithoutMainLoop.
2018-03-23 17:07:36 +01:00
// Instead, functions in github.com/hajimehoshi/ebiten/mobile package calls this.
2016-06-18 19:59:17 +02:00
func RunWithoutMainLoop(f func(*Image) error, width, height int, scale float64, title string) <-chan error {
f = (&imageDumper{f: f}).update
2016-05-18 18:49:57 +02:00
ch := make(chan error)
go func() {
2017-08-05 14:24:04 +02:00
defer close(ch)
2016-05-18 18:49:57 +02:00
g := newGraphicsContext(f)
theGraphicsContext.Store(g)
if err := run(width, height, scale, title, g, false); err != nil {
2016-05-18 18:49:57 +02:00
ch <- err
2017-08-05 14:24:04 +02:00
return
2016-05-18 18:49:57 +02:00
}
}()
return ch
2016-05-18 18:49:57 +02:00
}
// ScreenSizeInFullscreen returns the size in device-independent pixels when the game is fullscreen.
// The adopted monitor is the 'current' monitor which the window belongs to.
// The returned value can be given to Run or SetSize function if the perfectly fit fullscreen is needed.
2018-05-04 09:09:55 +02:00
//
// On browsers, ScreenSizeInFullscreen returns the 'window' (global object) size, not 'screen' size since an Ebiten game
2018-05-04 09:09:55 +02:00
// should not know the outside of the window object.
2018-12-03 18:23:25 +01:00
// For more details, see SetFullscreen API comment.
2018-05-04 09:09:55 +02:00
//
// On mobiles, ScreenSizeInFullscreen returns (0, 0) so far.
2018-05-04 09:09:55 +02:00
//
// If you use this for screen size with SetFullscreen(true), you can get the fullscreen mode
// which size is well adjusted with the monitor.
//
// w, h := ScreenSizeInFullscreen()
2018-05-04 09:09:55 +02:00
// ebiten.SetFullscreen(true)
// ebiten.Run(update, w, h, 1, "title")
//
// Furthermore, you can use them with DeviceScaleFactor(), you can get the finest
// fullscreen mode.
//
// s := ebiten.DeviceScaleFactor()
// w, h := ScreenSizeInFullscreen()
2018-05-04 09:09:55 +02:00
// ebiten.SetFullscreen(true)
// ebiten.Run(update, int(float64(w) * s), int(float64(h) * s), 1/s, "title")
//
// For actual example, see examples/fullscreen
//
// ScreenSizeInFullscreen must be called on the main thread before ebiten.Run, and is concurrent-safe after ebiten.Run.
func ScreenSizeInFullscreen() (int, int) {
return ui.ScreenSizeInFullscreen()
2018-05-04 09:09:55 +02:00
}
2018-10-11 03:29:57 +02:00
// MonitorSize is deprecated as of 1.8.0-alpha. Use ScreenSizeInFullscreen instead.
func MonitorSize() (int, int) {
return ScreenSizeInFullscreen()
}
2016-03-26 09:50:00 +01:00
// SetScreenSize changes the (logical) size of the screen.
// This doesn't affect the current scale of the screen.
2016-03-26 10:46:07 +01:00
//
2016-07-02 21:13:39 +02:00
// Unit is device-independent pixel.
//
// SetScreenSize is concurrent-safe.
2016-03-26 09:50:00 +01:00
func SetScreenSize(width, height int) {
if width <= 0 || height <= 0 {
panic("ebiten: width and height must be positive")
2016-04-10 18:45:13 +02:00
}
ui.SetScreenSize(width, height)
2016-03-26 09:50:00 +01:00
}
// SetScreenScale changes the scale of the screen.
2016-03-26 10:46:07 +01:00
//
2018-01-03 08:52:41 +01:00
// Note that the actual screen is multiplied not only by the given scale but also
// by the device scale on high-DPI display.
// If you pass inverse of the device scale,
// you can disable this automatical device scaling as a result.
// You can get the device scale by DeviceScaleFactor function.
2018-01-03 08:52:41 +01:00
//
// SetScreenScale is concurrent-safe.
2016-06-18 19:59:17 +02:00
func SetScreenScale(scale float64) {
if scale <= 0 {
panic("ebiten: scale must be positive")
2016-04-10 18:45:13 +02:00
}
ui.SetScreenScale(scale)
2015-02-09 16:10:50 +01:00
}
2016-03-22 16:44:16 +01:00
// ScreenScale returns the current screen scale.
2016-03-26 10:46:07 +01:00
//
2016-09-03 14:14:06 +02:00
// If Run is not called, this returns 0.
//
// ScreenScale is concurrent-safe.
2016-06-18 19:59:17 +02:00
func ScreenScale() float64 {
2016-09-02 16:38:02 +02:00
return ui.ScreenScale()
2016-03-22 16:44:16 +01:00
}
2016-09-03 10:17:54 +02:00
2017-08-12 08:39:41 +02:00
// IsCursorVisible returns a boolean value indicating whether
// the cursor is visible or not.
//
// IsCursorVisible always returns false on mobiles.
//
// IsCursorVisible is concurrent-safe.
2017-08-12 08:39:41 +02:00
func IsCursorVisible() bool {
return ui.IsCursorVisible()
}
// SetCursorVisible changes the state of cursor visiblity.
2016-09-03 10:17:54 +02:00
//
// SetCursorVisible does nothing on mobiles.
2017-08-12 08:39:41 +02:00
//
// SetCursorVisible is concurrent-safe.
func SetCursorVisible(visible bool) {
ui.SetCursorVisible(visible)
}
// SetCursorVisibility is deprecated as of 1.6.0-alpha. Use SetCursorVisible instead.
2016-09-03 10:17:54 +02:00
func SetCursorVisibility(visible bool) {
SetCursorVisible(visible)
2016-09-03 10:17:54 +02:00
}
2017-08-12 06:38:59 +02:00
// IsFullscreen returns a boolean value indicating whether
2017-07-01 06:07:44 +02:00
// the current mode is fullscreen or not.
//
2017-09-30 18:59:34 +02:00
// IsFullscreen always returns false on mobiles.
//
// IsFullscreen is concurrent-safe.
func IsFullscreen() bool {
return ui.IsFullscreen()
}
2017-07-01 06:07:44 +02:00
// SetFullscreen changes the current mode to fullscreen or not.
//
// On fullscreen mode, the game screen is automatically enlarged
// to fit with the monitor. The current scale value is ignored.
//
2017-07-21 19:15:09 +02:00
// On desktops, Ebiten uses 'windowed' fullscreen mode, which doesn't change
2017-07-01 06:07:44 +02:00
// your monitor's resolution.
//
2017-07-21 19:15:09 +02:00
// On browsers, the game screen is resized to fit with the body element (client) size.
// Additionally, the game screen is automatically resized when the body element is resized.
2018-05-04 09:09:55 +02:00
// Note that this has nothing to do with 'screen' which is outside of 'window'.
// It is recommended to put Ebiten game in an iframe, and if you want to make the game 'fullscreen'
// on browsers with Fullscreen API, you can do this by applying the API to the iframe.
2017-07-21 19:15:09 +02:00
//
2017-08-12 08:39:41 +02:00
// SetFullscreen does nothing on mobiles.
2017-07-21 19:15:09 +02:00
//
// SetFullscreen is concurrent-safe.
func SetFullscreen(fullscreen bool) {
ui.SetFullscreen(fullscreen)
}
// IsRunnableInBackground returns a boolean value indicating whether
// the game runs even in background.
//
// IsRunnableInBackground is concurrent-safe.
func IsRunnableInBackground() bool {
return ui.IsRunnableInBackground()
}
// SetWindowDecorated sets the state if the window is decorated.
//
// The window is decorated by default.
//
// SetWindowDecorated works only on desktops.
// SetWindowDecorated does nothing on other platforms.
//
// SetWindowDecorated panics if SetWindowDecorated is called after Run.
//
// SetWindowDecorated is concurrent-safe.
func SetWindowDecorated(decorated bool) {
ui.SetWindowDecorated(decorated)
}
// IsWindowDecorated reports whether the window is decorated.
//
// IsWindowDecorated is concurrent-safe.
func IsWindowDecorated() bool {
return ui.IsWindowDecorated()
}
2019-02-24 18:16:25 +01:00
// setWindowResizable is unexported until specification is determined (#320)
//
// setWindowResizable sets the state if the window is resizable.
//
// The window is not resizable by default.
//
// When the window is resizable, the image size given via the update function can be changed by resizing.
//
2019-02-24 18:16:25 +01:00
// setWindowResizable works only on desktops.
// setWindowResizable does nothing on other platforms.
//
2019-02-24 18:16:25 +01:00
// setWindowResizable panics if setWindowResizable is called after Run.
//
2019-02-24 18:16:25 +01:00
// setWindowResizable is concurrent-safe.
func setWindowResizable(resizable bool) {
ui.SetWindowResizable(resizable)
}
// IsWindowResizable reports whether the window is resizable.
//
// IsWindowResizable is concurrent-safe.
func IsWindowResizable() bool {
return ui.IsWindowResizable()
}
// SetRunnableInBackground sets the state if the game runs even in background.
//
// If the given value is true, the game runs in background e.g. when losing focus.
// The initial state is false.
//
// Known issue: On browsers, even if the state is on, the game doesn't run in background tabs.
// This is because browsers throttles background tabs not to often update.
//
2017-08-12 08:39:41 +02:00
// SetRunnableInBackground does nothing on mobiles so far.
//
// SetRunnableInBackground is concurrent-safe.
func SetRunnableInBackground(runnableInBackground bool) {
ui.SetRunnableInBackground(runnableInBackground)
}
2017-09-22 21:12:02 +02:00
2018-05-02 12:09:03 +02:00
// SetWindowTitle sets the title of the window.
//
// SetWindowTitle does nothing on mobiles.
//
// SetWindowTitle is concurrent-safe.
func SetWindowTitle(title string) {
ui.SetWindowTitle(title)
}
// SetWindowIcon sets the icon of the game window.
2017-09-22 21:12:02 +02:00
//
// If len(iconImages) is 0, SetWindowIcon reverts the icon to the default one.
2017-09-22 21:12:02 +02:00
//
// For desktops, see the document of glfwSetWindowIcon of GLFW 3.2:
//
// This function sets the icon of the specified window.
// If passed an array of candidate images, those of or closest to the sizes
// desired by the system are selected.
// If no images are specified, the window reverts to its default icon.
//
// The desired image sizes varies depending on platform and system settings.
// The selected images will be rescaled as needed.
// Good sizes include 16x16, 32x32 and 48x48.
2017-09-22 21:12:02 +02:00
//
// As macOS windows don't have icons, SetWindowIcon doesn't work on macOS.
2017-09-22 21:12:02 +02:00
//
// SetWindowIcon doesn't work on browsers or mobiles.
2017-09-22 21:12:02 +02:00
//
// SetWindowIcon is concurrent-safe.
func SetWindowIcon(iconImages []image.Image) {
ui.SetWindowIcon(iconImages)
2017-09-22 21:12:02 +02:00
}
2018-01-02 21:25:22 +01:00
// DeviceScaleFactor returns a device scale factor value of the current monitor which the window belongs to.
2018-01-03 08:52:41 +01:00
//
// DeviceScaleFactor returns a meaningful value on high-DPI display environment,
// otherwise DeviceScaleFactor returns 1.
2018-01-03 08:52:41 +01:00
//
// DeviceScaleFactor might panic on init function on some devices like Android.
// Then, it is not recommended to call DeviceScaleFactor from init functions.
//
// DeviceScaleFactor must be called on the main thread before ebiten.Run, and is concurrent-safe after ebiten.Run.
func DeviceScaleFactor() float64 {
return ui.DeviceScaleFactor()
2018-01-02 21:25:22 +01:00
}
// IsVsyncEnabled returns a boolean value indicating whether
// the game uses the display's vsync.
//
// IsVsyncEnabled is concurrent-safe.
func IsVsyncEnabled() bool {
return ui.IsVsyncEnabled()
}
// SetVsyncEnabled sets a boolean value indicating whether
// the game uses the display's vsync.
//
// If the given value is true, the game tries to sync the display's refresh rate.
// If false, the game ignores the display's refresh rate.
// The initial value is true.
// By disabling vsync, the game works more efficiently but consumes more CPU.
//
2018-12-03 18:23:25 +01:00
// Note that the state doesn't affect TPS (ticks per second, i.e. how many the run function is
2018-07-15 21:57:15 +02:00
// updated per second).
//
2018-07-15 21:57:15 +02:00
// SetVsyncEnabled does nothing on mobiles so far.
//
// SetVsyncEnabled is concurrent-safe.
func SetVsyncEnabled(enabled bool) {
ui.SetVsyncEnabled(enabled)
}
2018-07-17 15:41:27 +02:00
// MaxTPS returns the current maximum TPS.
//
2018-07-17 15:41:27 +02:00
// MaxTPS is concurrent-safe.
func MaxTPS() int {
return int(atomic.LoadInt32(&currentMaxTPS))
}
2018-07-17 19:11:00 +02:00
// CurrentTPS returns the current TPS (ticks per second),
// that represents how many update function is called in a second.
2018-07-17 19:17:06 +02:00
//
// CurrentTPS is concurrent-safe.
2018-07-17 19:11:00 +02:00
func CurrentTPS() float64 {
return clock.CurrentTPS()
}
// UncappedTPS is a special TPS value that means the game doesn't have limitation on TPS.
2018-07-17 19:11:00 +02:00
const UncappedTPS = clock.UncappedTPS
// SetMaxTPS sets the maximum TPS (ticks per second),
// that represents how many updating function is called per second.
// The initial value is 60.
//
// If tps is UncappedTPS, TPS is uncapped and the game is updated per frame.
// If tps is negative but not UncappedTPS, SetMaxTPS panics.
//
// SetMaxTPS is concurrent-safe.
func SetMaxTPS(tps int) {
if tps < 0 && tps != UncappedTPS {
panic("ebiten: tps must be >= 0 or UncappedTPS")
}
2018-07-17 15:41:27 +02:00
atomic.StoreInt32(&currentMaxTPS, int32(tps))
}