mirror of
https://github.com/hajimehoshi/ebiten.git
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d4a522d9da
Go's int can be 64bit or 32bit, while C's int is always 32bit on Windows in Ebiten usage. For C's int argument, do not pass Go's int pointer or broken values are set. Related to #829
405 lines
9.4 KiB
Go
405 lines
9.4 KiB
Go
// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package glfw
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import (
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"image"
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"image/draw"
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"runtime"
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"sync"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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type glfwVidMode struct {
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width int32
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height int32
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redBits int32
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greenBits int32
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blueBits int32
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refreshRate int32
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}
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type glfwImage struct {
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width int32
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height int32
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pixels uintptr
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}
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type glfwWindows map[uintptr]*Window
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var (
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theGLFWWindows = glfwWindows{}
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glfwWindowsM sync.Mutex
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)
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func (w glfwWindows) add(win uintptr) *Window {
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if win == 0 {
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return nil
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}
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ww := &Window{win}
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glfwWindowsM.Lock()
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w[win] = ww
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glfwWindowsM.Unlock()
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return ww
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}
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func (w glfwWindows) remove(win uintptr) {
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glfwWindowsM.Lock()
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delete(w, win)
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glfwWindowsM.Unlock()
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}
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func (w glfwWindows) get(win uintptr) *Window {
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if win == 0 {
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return nil
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}
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glfwWindowsM.Lock()
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ww := w[win]
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glfwWindowsM.Unlock()
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return ww
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}
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type Monitor struct {
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m uintptr
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}
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func (m *Monitor) GetPos() (int, int) {
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var x, y int32
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glfwDLL.call("glfwGetMonitorPos", m.m, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
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panicError()
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return int(x), int(y)
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}
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func (m *Monitor) GetVideoMode() *VidMode {
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v := glfwDLL.call("glfwGetVideoMode", m.m)
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panicError()
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vv := (*glfwVidMode)(unsafe.Pointer(v))
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return &VidMode{
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Width: int(vv.width),
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Height: int(vv.height),
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RedBits: int(vv.redBits),
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GreenBits: int(vv.greenBits),
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RefreshRate: int(vv.refreshRate),
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}
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}
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type Window struct {
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w uintptr
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}
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func (w *Window) Destroy() {
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glfwDLL.call("glfwDestroyWindow", w.w)
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panicError()
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theGLFWWindows.remove(w.w)
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}
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func (w *Window) GetAttrib(attrib Hint) int {
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r := glfwDLL.call("glfwGetWindowAttrib", w.w, uintptr(attrib))
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panicError()
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return int(r)
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}
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func (w *Window) GetCursorPos() (x, y float64) {
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glfwDLL.call("glfwGetCursorPos", w.w, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
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panicError()
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return
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}
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func (w *Window) GetInputMode(mode InputMode) int {
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r := glfwDLL.call("glfwGetInputMode", w.w, uintptr(mode))
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panicError()
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return int(r)
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}
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func (w *Window) GetKey(key Key) Action {
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r := glfwDLL.call("glfwGetKey", w.w, uintptr(key))
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panicError()
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return Action(r)
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}
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func (w *Window) GetMonitor() *Monitor {
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m := glfwDLL.call("glfwGetWindowMonitor", w.w)
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panicError()
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if m == 0 {
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return nil
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}
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return &Monitor{m}
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}
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func (w *Window) GetMouseButton(button MouseButton) Action {
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r := glfwDLL.call("glfwGetMouseButton", w.w, uintptr(button))
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panicError()
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return Action(r)
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}
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func (w *Window) GetPos() (int, int) {
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var x, y int32
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glfwDLL.call("glfwGetWindowPos", w.w, uintptr(unsafe.Pointer(&x)), uintptr(unsafe.Pointer(&y)))
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panicError()
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return int(x), int(y)
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}
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func (w *Window) GetSize() (int, int) {
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var width, height int32
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glfwDLL.call("glfwGetWindowSize", w.w, uintptr(unsafe.Pointer(&width)), uintptr(unsafe.Pointer(&height)))
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panicError()
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return int(width), int(height)
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}
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func (w *Window) MakeContextCurrent() {
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glfwDLL.call("glfwMakeContextCurrent", w.w)
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panicError()
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}
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func (w *Window) SetCharModsCallback(cbfun CharModsCallback) (previous CharModsCallback) {
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var gcb uintptr
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if cbfun != nil {
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gcb = windows.NewCallbackCDecl(func(window uintptr, char rune, mods ModifierKey) uintptr {
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cbfun(theGLFWWindows.get(window), char, mods)
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return 0
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})
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}
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glfwDLL.call("glfwSetCharModsCallback", w.w, gcb)
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panicError()
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return nil // TODO
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}
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func (w *Window) SetFramebufferSizeCallback(cbfun FramebufferSizeCallback) (previous FramebufferSizeCallback) {
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var gcb uintptr
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if cbfun != nil {
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gcb = windows.NewCallbackCDecl(func(window uintptr, width int, height int) uintptr {
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cbfun(theGLFWWindows.get(window), width, height)
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return 0
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})
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}
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glfwDLL.call("glfwSetFramebufferSizeCallback", w.w, gcb)
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panicError()
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return nil // TODO
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}
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func (w *Window) SetScrollCallback(cbfun ScrollCallback) (previous ScrollCallback) {
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var gcb uintptr
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if cbfun != nil {
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gcb = windows.NewCallbackCDecl(func(window uintptr, xoff *float64, yoff *float64) uintptr {
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// xoff and yoff were originally float64, but there is no good way to pass them on 32bit
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// machines via NewCallback. We've fixed GLFW side to use pointer values.
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cbfun(theGLFWWindows.get(window), *xoff, *yoff)
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return 0
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})
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}
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glfwDLL.call("glfwSetScrollCallback", w.w, gcb)
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panicError()
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return nil // TODO
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}
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func (w *Window) SetSizeCallback(cbfun SizeCallback) (previous FramebufferSizeCallback) {
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var gcb uintptr
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if cbfun != nil {
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gcb = windows.NewCallbackCDecl(func(window uintptr, width int, height int) uintptr {
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cbfun(theGLFWWindows.get(window), width, height)
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return 0
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})
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}
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glfwDLL.call("glfwSetWindowSizeCallback", w.w, gcb)
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panicError()
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return nil // TODO
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}
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func (w *Window) SetIcon(images []image.Image) {
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gimgs := make([]glfwImage, len(images))
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defer runtime.KeepAlive(gimgs)
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for i, img := range images {
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b := img.Bounds()
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m := image.NewNRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
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draw.Draw(m, m.Bounds(), img, b.Min, draw.Src)
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gimgs[i].width = int32(b.Dx())
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gimgs[i].height = int32(b.Dy())
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gimgs[i].pixels = uintptr(unsafe.Pointer(&m.Pix[0]))
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}
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glfwDLL.call("glfwSetWindowIcon", w.w, uintptr(len(gimgs)), uintptr(unsafe.Pointer(&gimgs[0])))
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panicError()
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}
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func (w *Window) SetInputMode(mode InputMode, value int) {
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glfwDLL.call("glfwSetInputMode", w.w, uintptr(mode), uintptr(value))
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panicError()
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}
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func (w *Window) SetMonitor(monitor *Monitor, xpos, ypos, width, height, refreshRate int) {
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var m uintptr
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if monitor != nil {
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m = monitor.m
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}
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glfwDLL.call("glfwSetWindowMonitor", w.w, m, uintptr(xpos), uintptr(ypos), uintptr(width), uintptr(height), uintptr(refreshRate))
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panicError()
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}
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func (w *Window) SetPos(xpos, ypos int) {
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glfwDLL.call("glfwSetWindowPos", w.w, uintptr(xpos), uintptr(ypos))
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panicError()
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}
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func (w *Window) SetSize(width, height int) {
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glfwDLL.call("glfwSetWindowSize", w.w, uintptr(width), uintptr(height))
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panicError()
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}
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func (w *Window) SetTitle(title string) {
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s := []byte(title)
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s = append(s, 0)
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defer runtime.KeepAlive(s)
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glfwDLL.call("glfwSetWindowTitle", w.w, uintptr(unsafe.Pointer(&s[0])))
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panicError()
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}
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func (w *Window) ShouldClose() bool {
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r := glfwDLL.call("glfwWindowShouldClose", w.w)
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panicError()
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return r == True
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}
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func (w *Window) Show() {
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glfwDLL.call("glfwShowWindow", w.w)
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panicError()
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}
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func (w *Window) SwapBuffers() {
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glfwDLL.call("glfwSwapBuffers", w.w)
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panicError()
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}
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func CreateWindow(width, height int, title string, monitor *Monitor, share *Window) (*Window, error) {
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s := []byte(title)
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s = append(s, 0)
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defer runtime.KeepAlive(s)
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var gm uintptr
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if monitor != nil {
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gm = monitor.m
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}
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var gw uintptr
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if share != nil {
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gw = share.w
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}
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w := glfwDLL.call("glfwCreateWindow", uintptr(width), uintptr(height), uintptr(unsafe.Pointer(&s[0])), gm, gw)
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if w == 0 {
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return nil, acceptError(APIUnavailable, VersionUnavailable)
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}
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return theGLFWWindows.add(w), nil
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}
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func GetJoystickAxes(joy Joystick) []float32 {
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var l int32
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ptr := glfwDLL.call("glfwGetJoystickAxes", uintptr(joy), uintptr(unsafe.Pointer(&l)))
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panicError()
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as := make([]float32, l)
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for i := int32(0); i < l; i++ {
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as[i] = *(*float32)(unsafe.Pointer(ptr))
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ptr += unsafe.Sizeof(float32(0))
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}
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return as
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}
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func GetJoystickButtons(joy Joystick) []byte {
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var l int32
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ptr := glfwDLL.call("glfwGetJoystickButtons", uintptr(joy), uintptr(unsafe.Pointer(&l)))
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panicError()
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bs := make([]byte, l)
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for i := int32(0); i < l; i++ {
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bs[i] = *(*byte)(unsafe.Pointer(ptr))
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ptr++
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}
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return bs
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}
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func GetMonitors() []*Monitor {
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var l int32
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ptr := glfwDLL.call("glfwGetMonitors", uintptr(unsafe.Pointer(&l)))
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panicError()
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ms := make([]*Monitor, l)
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for i := int32(0); i < l; i++ {
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m := *(*unsafe.Pointer)(unsafe.Pointer(ptr))
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if m != nil {
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ms[i] = &Monitor{uintptr(m)}
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}
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ptr += unsafe.Sizeof(unsafe.Pointer(uintptr(0)))
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}
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return ms
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}
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func GetPrimaryMonitor() *Monitor {
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m := glfwDLL.call("glfwGetPrimaryMonitor")
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panicError()
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if m == 0 {
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return nil
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}
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return &Monitor{m}
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}
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func Init() error {
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glfwDLL.call("glfwInit")
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return acceptError(APIUnavailable)
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}
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func JoystickPresent(joy Joystick) bool {
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r := glfwDLL.call("glfwJoystickPresent", uintptr(joy))
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panicError()
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return r == True
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}
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func PollEvents() {
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glfwDLL.call("glfwPollEvents")
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panicError()
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}
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func SetMonitorCallback(cbfun func(monitor *Monitor, event MonitorEvent)) {
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var gcb uintptr
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if cbfun != nil {
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gcb = windows.NewCallbackCDecl(func(monitor uintptr, event MonitorEvent) uintptr {
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var m *Monitor
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if monitor != 0 {
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m = &Monitor{monitor}
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}
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cbfun(m, event)
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return 0
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})
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}
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glfwDLL.call("glfwSetMonitorCallback", gcb)
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panicError()
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}
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func SwapInterval(interval int) {
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glfwDLL.call("glfwSwapInterval", uintptr(interval))
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panicError()
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}
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func Terminate() {
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flushErrors()
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glfwDLL.call("glfwTerminate")
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if err := glfwDLL.unload(); err != nil {
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panic(err)
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}
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}
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func WindowHint(target Hint, hint int) {
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glfwDLL.call("glfwWindowHint", uintptr(target), uintptr(hint))
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panicError()
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}
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