ebiten/internal/glfw/glfw_windows.go
Hajime Hoshi 3c2d562967 internal/glfw: Bug fix: NewCallbackCDecl objects were leaked
Callbacks created by NewCallbackCDecl were never released and then
they are leaked, especially when the window size was changed by
SetWindowSize on Windows.

This change defines new callback ID types with uintptr, and reuse
the callbacks.

Closes #1672
2021-06-13 22:23:01 +09:00

454 lines
10 KiB
Go

// Copyright 2018 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.
package glfw
import (
"image"
"image/draw"
"math/bits"
"reflect"
"runtime"
"sync"
"unsafe"
"golang.org/x/sys/windows"
)
type glfwImage struct {
width int32
height int32
pixels uintptr
}
type glfwWindows map[uintptr]*Window
var (
theGLFWWindows = glfwWindows{}
glfwWindowsM sync.Mutex
)
func (w glfwWindows) add(win uintptr) *Window {
if win == 0 {
return nil
}
ww := &Window{w: win}
glfwWindowsM.Lock()
w[win] = ww
glfwWindowsM.Unlock()
return ww
}
func (w glfwWindows) remove(win uintptr) {
glfwWindowsM.Lock()
delete(w, win)
glfwWindowsM.Unlock()
}
func (w glfwWindows) get(win uintptr) *Window {
if win == 0 {
return nil
}
glfwWindowsM.Lock()
ww := w[win]
glfwWindowsM.Unlock()
return ww
}
type Cursor struct {
c uintptr
}
func CreateStandardCursor(shape StandardCursor) *Cursor {
c := glfwDLL.call("glfwCreateStandardCursor", uintptr(shape))
panicError()
return &Cursor{c: c}
}
type Monitor struct {
m uintptr
}
func (m *Monitor) GetPos() (int, int) {
var x, y int32
glfwDLL.call("glfwGetMonitorPos", m.m, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
panicError()
return int(x), int(y)
}
func (m *Monitor) GetVideoMode() *VidMode {
v := glfwDLL.call("glfwGetVideoMode", m.m)
panicError()
var vals []int32
h := (*reflect.SliceHeader)(unsafe.Pointer(&vals))
h.Data = v
h.Len = 6
h.Cap = 6
return &VidMode{
Width: int(vals[0]),
Height: int(vals[1]),
RedBits: int(vals[2]),
GreenBits: int(vals[3]),
BlueBits: int(vals[4]),
RefreshRate: int(vals[5]),
}
}
type Window struct {
w uintptr
prevSizeCallback SizeCallback
}
func (w *Window) Destroy() {
glfwDLL.call("glfwDestroyWindow", w.w)
panicError()
theGLFWWindows.remove(w.w)
}
func (w *Window) GetAttrib(attrib Hint) int {
r := glfwDLL.call("glfwGetWindowAttrib", w.w, uintptr(attrib))
panicError()
return int(r)
}
func (w *Window) SetAttrib(attrib Hint, value int) {
glfwDLL.call("glfwSetWindowAttrib", w.w, uintptr(attrib), uintptr(value))
panicError()
}
func (w *Window) GetCursorPos() (x, y float64) {
glfwDLL.call("glfwGetCursorPos", w.w, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
panicError()
return
}
func (w *Window) GetInputMode(mode InputMode) int {
r := glfwDLL.call("glfwGetInputMode", w.w, uintptr(mode))
panicError()
return int(r)
}
func (w *Window) GetKey(key Key) Action {
r := glfwDLL.call("glfwGetKey", w.w, uintptr(key))
panicError()
return Action(r)
}
func (w *Window) GetMonitor() *Monitor {
m := glfwDLL.call("glfwGetWindowMonitor", w.w)
panicError()
if m == 0 {
return nil
}
return &Monitor{m}
}
func (w *Window) GetMouseButton(button MouseButton) Action {
r := glfwDLL.call("glfwGetMouseButton", w.w, uintptr(button))
panicError()
return Action(r)
}
func (w *Window) GetPos() (int, int) {
var x, y int32
glfwDLL.call("glfwGetWindowPos", w.w, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
panicError()
return int(x), int(y)
}
func (w *Window) GetSize() (int, int) {
var width, height int32
glfwDLL.call("glfwGetWindowSize", w.w, uintptr(unsafe.Pointer(&width)), uintptr(unsafe.Pointer(&height)))
panicError()
return int(width), int(height)
}
func (w *Window) Iconify() {
glfwDLL.call("glfwIconifyWindow", w.w)
panicError()
}
func (w *Window) MakeContextCurrent() {
glfwDLL.call("glfwMakeContextCurrent", w.w)
panicError()
}
func (w *Window) Maximize() {
glfwDLL.call("glfwMaximizeWindow", w.w)
panicError()
}
func (w *Window) Restore() {
glfwDLL.call("glfwRestoreWindow", w.w)
panicError()
}
func (w *Window) SetCharModsCallback(cbfun CharModsCallback) (previous CharModsCallback) {
glfwDLL.call("glfwSetCharModsCallback", w.w, uintptr(cbfun))
panicError()
return ToCharModsCallback(nil) // TODO
}
func (w *Window) SetCursor(cursor *Cursor) {
var c uintptr
if cursor != nil {
c = cursor.c
}
glfwDLL.call("glfwSetCursor", w.w, c)
}
func (w *Window) SetFramebufferSizeCallback(cbfun FramebufferSizeCallback) (previous FramebufferSizeCallback) {
glfwDLL.call("glfwSetFramebufferSizeCallback", w.w, uintptr(cbfun))
panicError()
return ToFramebufferSizeCallback(nil) // TODO
}
func (w *Window) SetScrollCallback(cbfun ScrollCallback) (previous ScrollCallback) {
glfwDLL.call("glfwSetScrollCallback", w.w, uintptr(cbfun))
panicError()
return ToScrollCallback(nil) // TODO
}
func (w *Window) SetSizeCallback(cbfun SizeCallback) (previous SizeCallback) {
glfwDLL.call("glfwSetWindowSizeCallback", w.w, uintptr(cbfun))
panicError()
prev := w.prevSizeCallback
w.prevSizeCallback = cbfun
return prev
}
func (w *Window) SetSizeLimits(minw, minh, maxw, maxh int) {
glfwDLL.call("glfwSetWindowSizeLimits", w.w, uintptr(minw), uintptr(minh), uintptr(maxw), uintptr(maxh))
panicError()
}
func (w *Window) SetIcon(images []image.Image) {
gimgs := make([]glfwImage, len(images))
defer runtime.KeepAlive(gimgs)
for i, img := range images {
b := img.Bounds()
m := image.NewNRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(m, m.Bounds(), img, b.Min, draw.Src)
gimgs[i].width = int32(b.Dx())
gimgs[i].height = int32(b.Dy())
gimgs[i].pixels = uintptr(unsafe.Pointer(&m.Pix[0]))
}
glfwDLL.call("glfwSetWindowIcon", w.w, uintptr(len(gimgs)), uintptr(unsafe.Pointer(&gimgs[0])))
panicError()
}
func (w *Window) SetInputMode(mode InputMode, value int) {
glfwDLL.call("glfwSetInputMode", w.w, uintptr(mode), uintptr(value))
panicError()
}
func (w *Window) SetMonitor(monitor *Monitor, xpos, ypos, width, height, refreshRate int) {
var m uintptr
if monitor != nil {
m = monitor.m
}
glfwDLL.call("glfwSetWindowMonitor", w.w, m, uintptr(xpos), uintptr(ypos), uintptr(width), uintptr(height), uintptr(refreshRate))
panicError()
}
func (w *Window) SetPos(xpos, ypos int) {
glfwDLL.call("glfwSetWindowPos", w.w, uintptr(xpos), uintptr(ypos))
panicError()
}
func (w *Window) SetSize(width, height int) {
glfwDLL.call("glfwSetWindowSize", w.w, uintptr(width), uintptr(height))
panicError()
}
func (w *Window) SetTitle(title string) {
s := []byte(title)
s = append(s, 0)
defer runtime.KeepAlive(s)
glfwDLL.call("glfwSetWindowTitle", w.w, uintptr(unsafe.Pointer(&s[0])))
panicError()
}
func (w *Window) ShouldClose() bool {
r := glfwDLL.call("glfwWindowShouldClose", w.w)
panicError()
return r == True
}
func (w *Window) Show() {
glfwDLL.call("glfwShowWindow", w.w)
panicError()
}
func (w *Window) SwapBuffers() {
glfwDLL.call("glfwSwapBuffers", w.w)
panicError()
}
func CreateWindow(width, height int, title string, monitor *Monitor, share *Window) (*Window, error) {
s := []byte(title)
s = append(s, 0)
defer runtime.KeepAlive(s)
var gm uintptr
if monitor != nil {
gm = monitor.m
}
var gw uintptr
if share != nil {
gw = share.w
}
w := glfwDLL.call("glfwCreateWindow", uintptr(width), uintptr(height), uintptr(unsafe.Pointer(&s[0])), gm, gw)
if w == 0 {
return nil, acceptError(APIUnavailable, VersionUnavailable)
}
return theGLFWWindows.add(w), nil
}
func (j Joystick) GetGUID() string {
ptr := glfwDLL.call("glfwGetJoystickGUID", uintptr(j))
panicError()
var backed [256]byte
as := backed[:0]
for i := int32(0); ; i++ {
b := *(*byte)(unsafe.Pointer(ptr))
ptr += unsafe.Sizeof(byte(0))
if b == 0 {
break
}
as = append(as, b)
}
r := string(as)
return r
}
func (j Joystick) GetName() string {
ptr := glfwDLL.call("glfwGetJoystickName", uintptr(j))
panicError()
var backed [256]byte
as := backed[:0]
for i := int32(0); ; i++ {
b := *(*byte)(unsafe.Pointer(ptr))
ptr += unsafe.Sizeof(byte(0))
if b == 0 {
break
}
as = append(as, b)
}
r := string(as)
return r
}
func (j Joystick) GetAxes() []float32 {
var l int32
ptr := glfwDLL.call("glfwGetJoystickAxes", uintptr(j), uintptr(unsafe.Pointer(&l)))
panicError()
as := make([]float32, l)
for i := int32(0); i < l; i++ {
as[i] = *(*float32)(unsafe.Pointer(ptr))
ptr += unsafe.Sizeof(float32(0))
}
return as
}
func (j Joystick) GetButtons() []byte {
var l int32
ptr := glfwDLL.call("glfwGetJoystickButtons", uintptr(j), uintptr(unsafe.Pointer(&l)))
panicError()
bs := make([]byte, l)
for i := int32(0); i < l; i++ {
bs[i] = *(*byte)(unsafe.Pointer(ptr))
ptr++
}
return bs
}
func GetMonitors() []*Monitor {
var l int32
ptr := glfwDLL.call("glfwGetMonitors", uintptr(unsafe.Pointer(&l)))
panicError()
ms := make([]*Monitor, l)
for i := int32(0); i < l; i++ {
m := *(*unsafe.Pointer)(unsafe.Pointer(ptr))
if m != nil {
ms[i] = &Monitor{uintptr(m)}
}
ptr += bits.UintSize / 8
}
return ms
}
func GetPrimaryMonitor() *Monitor {
m := glfwDLL.call("glfwGetPrimaryMonitor")
panicError()
if m == 0 {
return nil
}
return &Monitor{m}
}
func Init() error {
glfwDLL.call("glfwInit")
return acceptError(APIUnavailable)
}
func (j Joystick) Present() bool {
r := glfwDLL.call("glfwJoystickPresent", uintptr(j))
panicError()
return r == True
}
func PollEvents() {
glfwDLL.call("glfwPollEvents")
panicError()
}
func SetMonitorCallback(cbfun func(monitor *Monitor, event PeripheralEvent)) {
var gcb uintptr
if cbfun != nil {
gcb = windows.NewCallbackCDecl(func(monitor uintptr, event PeripheralEvent) uintptr {
var m *Monitor
if monitor != 0 {
m = &Monitor{monitor}
}
cbfun(m, event)
return 0
})
}
glfwDLL.call("glfwSetMonitorCallback", gcb)
panicError()
}
func SwapInterval(interval int) {
glfwDLL.call("glfwSwapInterval", uintptr(interval))
panicError()
}
func Terminate() {
flushErrors()
glfwDLL.call("glfwTerminate")
if err := glfwDLL.unload(); err != nil {
panic(err)
}
}
func WindowHint(target Hint, hint int) {
glfwDLL.call("glfwWindowHint", uintptr(target), uintptr(hint))
panicError()
}