internal/uidriver/cbackend: add a new file

internal/uidriver/cbackend/gamepad.go

@@ -0,0 +1,210 @@
+// Copyright 2022 The Ebiten Authors
+//
+// 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 ebitencbackend
+// +build ebitencbackend
+
+package cbackend
+
+import (
+	"time"
+
+	"github.com/hajimehoshi/ebiten/v2/internal/cbackend"
+	"github.com/hajimehoshi/ebiten/v2/internal/driver"
+)
+
+func (i *Input) updateGamepads() {
+	i.gamepads = i.gamepads[:0]
+	i.gamepads = cbackend.AppendGamepads(i.gamepads)
+}
+
+func (i *Input) AppendGamepadIDs(gamepadIDs []driver.GamepadID) []driver.GamepadID {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		gamepadIDs = append(gamepadIDs, g.ID)
+	}
+	return gamepadIDs
+}
+
+func (i *Input) GamepadSDLID(id driver.GamepadID) string {
+	return ""
+}
+
+func (i *Input) GamepadName(id driver.GamepadID) string {
+	return ""
+}
+
+func (i *Input) GamepadAxisValue(id driver.GamepadID, axis int) float64 {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		if axis < 0 {
+			return 0
+		}
+		if g.AxisNum <= axis {
+			return 0
+		}
+		if len(g.AxisValues) <= axis {
+			return 0
+		}
+		return g.AxisValues[axis]
+	}
+	return 0
+}
+
+func (i *Input) GamepadAxisNum(id driver.GamepadID) int {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		return g.AxisNum
+	}
+	return 0
+}
+
+func (i *Input) GamepadButtonNum(id driver.GamepadID) int {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		return g.ButtonNum
+	}
+	return 0
+}
+
+func (i *Input) IsGamepadButtonPressed(id driver.GamepadID, button driver.GamepadButton) bool {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		if button < 0 {
+			return false
+		}
+		if g.ButtonNum <= int(button) {
+			return false
+		}
+		if len(g.ButtonPressed) <= int(button) {
+			return false
+		}
+		return g.ButtonPressed[button]
+	}
+	return false
+}
+
+func (i *Input) IsStandardGamepadButtonPressed(id driver.GamepadID, button driver.StandardGamepadButton) bool {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		if !g.Standard {
+			return false
+		}
+		if button < 0 {
+			return false
+		}
+		if g.ButtonNum <= int(button) {
+			return false
+		}
+		if len(g.ButtonPressed) <= int(button) {
+			return false
+		}
+		return g.ButtonPressed[button]
+	}
+	return false
+}
+
+func (i *Input) IsStandardGamepadLayoutAvailable(id driver.GamepadID) bool {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		return g.Standard
+	}
+	return false
+}
+
+func (i *Input) StandardGamepadAxisValue(id driver.GamepadID, axis driver.StandardGamepadAxis) float64 {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		if !g.Standard {
+			return 0
+		}
+		if axis < 0 {
+			return 0
+		}
+		if g.AxisNum <= int(axis) {
+			return 0
+		}
+		if len(g.AxisValues) <= int(axis) {
+			return 0
+		}
+		return g.AxisValues[axis]
+	}
+	return 0
+}
+
+func (i *Input) StandardGamepadButtonValue(id driver.GamepadID, button driver.StandardGamepadButton) float64 {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	for _, g := range i.gamepads {
+		if g.ID != id {
+			continue
+		}
+		if !g.Standard {
+			return 0
+		}
+		if button < 0 {
+			return 0
+		}
+		if g.ButtonNum <= int(button) {
+			return 0
+		}
+		if len(g.ButtonValues) <= int(button) {
+			return 0
+		}
+		return g.ButtonValues[button]
+	}
+	return 0
+}
+
+func (i *Input) VibrateGamepad(id driver.GamepadID, duration time.Duration, strongMagnitude float64, weakMagnitude float64) {
+	cbackend.VibrateGamepad(id, duration, strongMagnitude, weakMagnitude)
+}