Move driver getters to graphicsdriver/uidriver packages

This enables to add internal functions to these packages so that
the driver selector logics can be modified.

input.go

@@ -16,6 +16,7 @@ package ebiten
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
+	"github.com/hajimehoshi/ebiten/internal/uidriver"
 )
 
 // InputChars return "printable" runes read from the keyboard at the time update is called.
@@ -28,7 +29,7 @@ import (
 //
 // InputChars is concurrent-safe.
 func InputChars() []rune {
-	rb := uiDriver().Input().RuneBuffer()
+	rb := uidriver.Get().Input().RuneBuffer()
 	return append(make([]rune, 0, len(rb)), rb...)
 }
 
@@ -41,7 +42,7 @@ func InputChars() []rune {
 //
 // IsKeyPressed is concurrent-safe.
 func IsKeyPressed(key Key) bool {
-	return uiDriver().Input().IsKeyPressed(driver.Key(key))
+	return uidriver.Get().Input().IsKeyPressed(driver.Key(key))
 }
 
 // CursorPosition returns a position of a mouse cursor relative to the game screen (window). The cursor position is
@@ -49,7 +50,7 @@ func IsKeyPressed(key Key) bool {
 //
 // CursorPosition is concurrent-safe.
 func CursorPosition() (x, y int) {
-	return uiDriver().Input().CursorPosition()
+	return uidriver.Get().Input().CursorPosition()
 }
 
 // Wheel returns the x and y offset of the mouse wheel or touchpad scroll.
@@ -57,7 +58,7 @@ func CursorPosition() (x, y int) {
 //
 // Wheel is concurrent-safe.
 func Wheel() (xoff, yoff float64) {
-	return uiDriver().Input().Wheel()
+	return uidriver.Get().Input().Wheel()
 }
 
 // IsMouseButtonPressed returns a boolean indicating whether mouseButton is pressed.
@@ -67,7 +68,7 @@ func Wheel() (xoff, yoff float64) {
 // Note that touch events not longer affect IsMouseButtonPressed's result as of 1.4.0-alpha.
 // Use Touches instead.
 func IsMouseButtonPressed(mouseButton MouseButton) bool {
-	return uiDriver().Input().IsMouseButtonPressed(driver.MouseButton(mouseButton))
+	return uidriver.Get().Input().IsMouseButtonPressed(driver.MouseButton(mouseButton))
 }
 
 // GamepadIDs returns a slice indicating available gamepad IDs.
@@ -76,7 +77,7 @@ func IsMouseButtonPressed(mouseButton MouseButton) bool {
 //
 // GamepadIDs always returns an empty slice on mobiles.
 func GamepadIDs() []int {
-	return uiDriver().Input().GamepadIDs()
+	return uidriver.Get().Input().GamepadIDs()
 }
 
 // GamepadAxisNum returns the number of axes of the gamepad (id).
@@ -85,7 +86,7 @@ func GamepadIDs() []int {
 //
 // GamepadAxisNum always returns 0 on mobiles.
 func GamepadAxisNum(id int) int {
-	return uiDriver().Input().GamepadAxisNum(id)
+	return uidriver.Get().Input().GamepadAxisNum(id)
 }
 
 // GamepadAxis returns the float value [-1.0 - 1.0] of the given gamepad (id)'s axis (axis).
@@ -94,7 +95,7 @@ func GamepadAxisNum(id int) int {
 //
 // GamepadAxis always returns 0 on mobiles.
 func GamepadAxis(id int, axis int) float64 {
-	return uiDriver().Input().GamepadAxis(id, axis)
+	return uidriver.Get().Input().GamepadAxis(id, axis)
 }
 
 // GamepadButtonNum returns the number of the buttons of the given gamepad (id).
@@ -103,7 +104,7 @@ func GamepadAxis(id int, axis int) float64 {
 //
 // GamepadButtonNum always returns 0 on mobiles.
 func GamepadButtonNum(id int) int {
-	return uiDriver().Input().GamepadButtonNum(id)
+	return uidriver.Get().Input().GamepadButtonNum(id)
 }
 
 // IsGamepadButtonPressed returns the boolean indicating the given button of the gamepad (id) is pressed or not.
@@ -115,7 +116,7 @@ func GamepadButtonNum(id int) int {
 //
 // IsGamepadButtonPressed always returns false on mobiles.
 func IsGamepadButtonPressed(id int, button GamepadButton) bool {
-	return uiDriver().Input().IsGamepadButtonPressed(id, driver.GamepadButton(button))
+	return uidriver.Get().Input().IsGamepadButtonPressed(id, driver.GamepadButton(button))
 }
 
 // TouchIDs returns the current touch states.
@@ -125,7 +126,7 @@ func IsGamepadButtonPressed(id int, button GamepadButton) bool {
 //
 // TouchIDs is concurrent-safe.
 func TouchIDs() []int {
-	return uiDriver().Input().TouchIDs()
+	return uidriver.Get().Input().TouchIDs()
 }
 
 // TouchPosition returns the position for the touch of the specified ID.
@@ -135,7 +136,7 @@ func TouchIDs() []int {
 // TouchPosition is cuncurrent-safe.
 func TouchPosition(id int) (int, int) {
 	found := false
-	for _, i := range uiDriver().Input().TouchIDs() {
+	for _, i := range uidriver.Get().Input().TouchIDs() {
 		if id == i {
 			found = true
 			break
@@ -145,7 +146,7 @@ func TouchPosition(id int) (int, int) {
 		return 0, 0
 	}
 
-	return uiDriver().Input().TouchPosition(id)
+	return uidriver.Get().Input().TouchPosition(id)
 }
 
 // Touch is deprecated as of 1.7.0. Use TouchPosition instead.

internal/graphicsdriver/graphicsdriver_mac.go

@@ -15,7 +15,7 @@
 // +build darwin,!ios
 // +build !js
 
-package ebiten
+package graphicsdriver
 
 // #cgo CFLAGS: -x objective-c
 // #cgo LDFLAGS: -framework Foundation
@@ -47,7 +47,7 @@ var (
 	isMetalSupportedOnce sync.Once
 )
 
-func graphicsDriver() driver.Graphics {
+func Get() driver.Graphics {
 	isMetalSupportedOnce.Do(func() {
 		// On old mac devices like iMac 2011, Metal is not supported (#779).
 		if _, err := mtl.CreateSystemDefaultDevice(); err != nil {

internal/graphicsdriver/graphicsdriver_opengl.go

@@ -16,13 +16,13 @@
 
 // As the Go playground tries to compile this with CGO_ENABLED=0 and GOOS=linux, check Cgo on build tags.
 
-package ebiten
+package graphicsdriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/opengl"
 )
 
-func graphicsDriver() driver.Graphics {
+func Get() driver.Graphics {
 	return opengl.Get()
 }

internal/graphicsdriver/graphicsdriver_playground.go

@@ -20,13 +20,13 @@
 // +build !linux,cgo !cgo
 // +build !windows
 
-package ebiten
+package graphicsdriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 )
 
-func graphicsDriver() driver.Graphics {
+func Get() driver.Graphics {
 	if !isPlayground {
 		panic("ebiten: a graphics driver is not implemented on this environment")
 	}

internal/uidriver/uidriver_glfw.go

@@ -17,13 +17,13 @@
 // +build !ios
 // +build !js
 
-package ebiten
+package uidriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 	"github.com/hajimehoshi/ebiten/internal/uidriver/glfw"
 )
 
-func uiDriver() driver.UI {
+func Get() driver.UI {
 	return glfw.Get()
 }

internal/uidriver/uidriver_js.go

@@ -14,13 +14,13 @@
 
 // +build js
 
-package ebiten
+package uidriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 	"github.com/hajimehoshi/ebiten/internal/uidriver/js"
 )
 
-func uiDriver() driver.UI {
+func Get() driver.UI {
 	return js.Get()
 }

internal/uidriver/uidriver_mobile.go

@@ -14,13 +14,13 @@
 
 // +build android ios
 
-package ebiten
+package uidriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 	"github.com/hajimehoshi/ebiten/internal/uidriver/mobile"
 )
 
-func uiDriver() driver.UI {
+func Get() driver.UI {
 	return mobile.Get()
 }

internal/uidriver/uidriver_playground.go

@@ -20,13 +20,13 @@
 // +build !linux,cgo !cgo
 // +build !windows
 
-package ebiten
+package uidriver
 
 import (
 	"github.com/hajimehoshi/ebiten/internal/driver"
 )
 
-func uiDriver() driver.UI {
+func Get() driver.UI {
 	if !isPlayground {
 		panic("ebiten: a UI driver is not implemented on this environment")
 	}

run.go

@@ -21,6 +21,8 @@ import (
 
 	"github.com/hajimehoshi/ebiten/internal/clock"
 	"github.com/hajimehoshi/ebiten/internal/driver"
+	"github.com/hajimehoshi/ebiten/internal/graphicsdriver"
+	"github.com/hajimehoshi/ebiten/internal/uidriver"
 	"github.com/hajimehoshi/ebiten/internal/web"
 )
 
@@ -142,7 +144,7 @@ func Run(f func(*Image) error, width, height int, scale float64, title string) e
 		defer atomic.StoreInt32(&isRunning, 0)
 	}
 
-	if err := uiDriver().Run(width, height, scale, title, c, graphicsDriver()); err != nil {
+	if err := uidriver.Get().Run(width, height, scale, title, c, graphicsdriver.Get()); err != nil {
 		if err == driver.RegularTermination {
 			return nil
 		}
@@ -164,7 +166,7 @@ func RunWithoutMainLoop(f func(*Image) error, width, height int, scale float64,
 	theUIContext.Store(c)
 
 	atomic.StoreInt32(&isRunning, 1)
-	return uiDriver().RunWithoutMainLoop(width, height, scale, title, c, graphicsDriver())
+	return uidriver.Get().RunWithoutMainLoop(width, height, scale, title, c, graphicsdriver.Get())
 }
 
 // ScreenSizeInFullscreen returns the size in device-independent pixels when the game is fullscreen.
@@ -196,7 +198,7 @@ func RunWithoutMainLoop(f func(*Image) error, width, height int, scale float64,
 //
 // ScreenSizeInFullscreen must be called on the main thread before ebiten.Run, and is concurrent-safe after ebiten.Run.
 func ScreenSizeInFullscreen() (int, int) {
-	return uiDriver().ScreenSizeInFullscreen()
+	return uidriver.Get().ScreenSizeInFullscreen()
 }
 
 // MonitorSize is deprecated as of 1.8.0-alpha. Use ScreenSizeInFullscreen instead.
@@ -214,7 +216,7 @@ func SetScreenSize(width, height int) {
 	if width <= 0 || height <= 0 {
 		panic("ebiten: width and height must be positive")
 	}
-	uiDriver().SetScreenSize(width, height)
+	uidriver.Get().SetScreenSize(width, height)
 }
 
 // SetScreenScale changes the scale of the screen.
@@ -230,7 +232,7 @@ func SetScreenScale(scale float64) {
 	if scale <= 0 {
 		panic("ebiten: scale must be positive")
 	}
-	uiDriver().SetScreenScale(scale)
+	uidriver.Get().SetScreenScale(scale)
 }
 
 // ScreenScale returns the current screen scale.
@@ -239,7 +241,7 @@ func SetScreenScale(scale float64) {
 //
 // ScreenScale is concurrent-safe.
 func ScreenScale() float64 {
-	return uiDriver().ScreenScale()
+	return uidriver.Get().ScreenScale()
 }
 
 // IsCursorVisible returns a boolean value indicating whether
@@ -249,7 +251,7 @@ func ScreenScale() float64 {
 //
 // IsCursorVisible is concurrent-safe.
 func IsCursorVisible() bool {
-	return uiDriver().IsCursorVisible()
+	return uidriver.Get().IsCursorVisible()
 }
 
 // SetCursorVisible changes the state of cursor visiblity.
@@ -258,7 +260,7 @@ func IsCursorVisible() bool {
 //
 // SetCursorVisible is concurrent-safe.
 func SetCursorVisible(visible bool) {
-	uiDriver().SetCursorVisible(visible)
+	uidriver.Get().SetCursorVisible(visible)
 }
 
 // SetCursorVisibility is deprecated as of 1.6.0-alpha. Use SetCursorVisible instead.
@@ -273,7 +275,7 @@ func SetCursorVisibility(visible bool) {
 //
 // IsFullscreen is concurrent-safe.
 func IsFullscreen() bool {
-	return uiDriver().IsFullscreen()
+	return uidriver.Get().IsFullscreen()
 }
 
 // SetFullscreen changes the current mode to fullscreen or not.
@@ -294,7 +296,7 @@ func IsFullscreen() bool {
 //
 // SetFullscreen is concurrent-safe.
 func SetFullscreen(fullscreen bool) {
-	uiDriver().SetFullscreen(fullscreen)
+	uidriver.Get().SetFullscreen(fullscreen)
 }
 
 // IsRunnableInBackground returns a boolean value indicating whether
@@ -302,7 +304,7 @@ func SetFullscreen(fullscreen bool) {
 //
 // IsRunnableInBackground is concurrent-safe.
 func IsRunnableInBackground() bool {
-	return uiDriver().IsRunnableInBackground()
+	return uidriver.Get().IsRunnableInBackground()
 }
 
 // SetWindowDecorated sets the state if the window is decorated.
@@ -316,14 +318,14 @@ func IsRunnableInBackground() bool {
 //
 // SetWindowDecorated is concurrent-safe.
 func SetWindowDecorated(decorated bool) {
-	uiDriver().SetWindowDecorated(decorated)
+	uidriver.Get().SetWindowDecorated(decorated)
 }
 
 // IsWindowDecorated reports whether the window is decorated.
 //
 // IsWindowDecorated is concurrent-safe.
 func IsWindowDecorated() bool {
-	return uiDriver().IsWindowDecorated()
+	return uidriver.Get().IsWindowDecorated()
 }
 
 // setWindowResizable is unexported until specification is determined (#320)
@@ -341,14 +343,14 @@ func IsWindowDecorated() bool {
 //
 // setWindowResizable is concurrent-safe.
 func setWindowResizable(resizable bool) {
-	uiDriver().SetWindowResizable(resizable)
+	uidriver.Get().SetWindowResizable(resizable)
 }
 
 // IsWindowResizable reports whether the window is resizable.
 //
 // IsWindowResizable is concurrent-safe.
 func IsWindowResizable() bool {
-	return uiDriver().IsWindowResizable()
+	return uidriver.Get().IsWindowResizable()
 }
 
 // SetRunnableInBackground sets the state if the game runs even in background.
@@ -363,7 +365,7 @@ func IsWindowResizable() bool {
 //
 // SetRunnableInBackground is concurrent-safe.
 func SetRunnableInBackground(runnableInBackground bool) {
-	uiDriver().SetRunnableInBackground(runnableInBackground)
+	uidriver.Get().SetRunnableInBackground(runnableInBackground)
 }
 
 // SetWindowTitle sets the title of the window.
@@ -372,7 +374,7 @@ func SetRunnableInBackground(runnableInBackground bool) {
 //
 // SetWindowTitle is concurrent-safe.
 func SetWindowTitle(title string) {
-	uiDriver().SetWindowTitle(title)
+	uidriver.Get().SetWindowTitle(title)
 }
 
 // SetWindowIcon sets the icon of the game window.
@@ -396,7 +398,7 @@ func SetWindowTitle(title string) {
 //
 // SetWindowIcon is concurrent-safe.
 func SetWindowIcon(iconImages []image.Image) {
-	uiDriver().SetWindowIcon(iconImages)
+	uidriver.Get().SetWindowIcon(iconImages)
 }
 
 // DeviceScaleFactor returns a device scale factor value of the current monitor which the window belongs to.
@@ -409,7 +411,7 @@ func SetWindowIcon(iconImages []image.Image) {
 //
 // DeviceScaleFactor must be called on the main thread before ebiten.Run, and is concurrent-safe after ebiten.Run.
 func DeviceScaleFactor() float64 {
-	return uiDriver().DeviceScaleFactor()
+	return uidriver.Get().DeviceScaleFactor()
 }
 
 // IsVsyncEnabled returns a boolean value indicating whether
@@ -417,7 +419,7 @@ func DeviceScaleFactor() float64 {
 //
 // IsVsyncEnabled is concurrent-safe.
 func IsVsyncEnabled() bool {
-	return uiDriver().IsVsyncEnabled()
+	return uidriver.Get().IsVsyncEnabled()
 }
 
 // SetVsyncEnabled sets a boolean value indicating whether
@@ -435,7 +437,7 @@ func IsVsyncEnabled() bool {
 //
 // SetVsyncEnabled is concurrent-safe.
 func SetVsyncEnabled(enabled bool) {
-	uiDriver().SetVsyncEnabled(enabled)
+	uidriver.Get().SetVsyncEnabled(enabled)
 }
 
 // MaxTPS returns the current maximum TPS.

uicontext.go

@@ -21,13 +21,15 @@ import (
 	"github.com/hajimehoshi/ebiten/internal/clock"
 	"github.com/hajimehoshi/ebiten/internal/driver"
 	"github.com/hajimehoshi/ebiten/internal/graphicscommand"
+	"github.com/hajimehoshi/ebiten/internal/graphicsdriver"
 	"github.com/hajimehoshi/ebiten/internal/hooks"
 	"github.com/hajimehoshi/ebiten/internal/shareable"
+	"github.com/hajimehoshi/ebiten/internal/uidriver"
 )
 
 func init() {
-	shareable.SetGraphicsDriver(graphicsDriver())
+	shareable.SetGraphicsDriver(graphicsdriver.Get())
-	graphicscommand.SetGraphicsDriver(graphicsDriver())
+	graphicscommand.SetGraphicsDriver(graphicsdriver.Get())
 }
 
 func newUIContext(f func(*Image) error) *uiContext {
@@ -63,7 +65,7 @@ func (c *uiContext) SetSize(screenWidth, screenHeight int, screenScale float64)
 	// Round up the screensize not to cause glitches e.g. on Xperia (#622)
 	w := int(math.Ceil(float64(screenWidth) * screenScale))
 	h := int(math.Ceil(float64(screenHeight) * screenScale))
-	px0, py0, px1, py1 := uiDriver().ScreenPadding()
+	px0, py0, px1, py1 := uidriver.Get().ScreenPadding()
 	c.screen = newImageWithScreenFramebuffer(w+int(math.Ceil(px0+px1)), h+int(math.Ceil(py0+py1)))
 	c.screenWidth = w
 	c.screenHeight = h
@@ -106,7 +108,7 @@ func (c *uiContext) Update(afterFrameUpdate func()) error {
 			return err
 		}
 
-		uiDriver().Input().ResetForFrame()
+		uidriver.Get().Input().ResetForFrame()
 		afterFrameUpdate()
 	}
 
@@ -115,7 +117,7 @@ func (c *uiContext) Update(afterFrameUpdate func()) error {
 
 	op := &DrawImageOptions{}
 
-	switch vd := graphicsDriver().VDirection(); vd {
+	switch vd := graphicsdriver.Get().VDirection(); vd {
 	case driver.VDownward:
 		// c.screen is special: its Y axis is down to up,
 		// and the origin point is lower left.