mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
98 lines
1.7 KiB
Go
98 lines
1.7 KiB
Go
package main
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// #cgo LDFLAGS: -framework GLUT -framework OpenGL
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//
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// #include <stdlib.h>
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// #include <GLUT/glut.h>
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//
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// void display(void);
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// void idle(void);
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//
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// static void setGlutFuncs(void) {
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// glutDisplayFunc(display);
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// glutIdleFunc(idle);
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// }
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//
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import "C"
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import (
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"image/color"
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"os"
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"time"
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"unsafe"
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"github.com/hajimehoshi/go-ebiten/graphics"
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)
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var device *graphics.Device
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type DemoGame struct {
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}
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func (game *DemoGame) Update() {
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}
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func (game *DemoGame) Draw(g *graphics.GraphicsContext, offscreen *graphics.Texture) {
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g.Fill(&color.RGBA{R: 128, G: 128, B: 255, A: 255})
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}
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//export display
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func display() {
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device.Update()
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C.glutSwapBuffers()
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}
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//export idle
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func idle() {
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C.glutPostRedisplay()
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}
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func main() {
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cargs := []*C.char{}
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for _, arg := range os.Args {
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cargs = append(cargs, C.CString(arg))
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}
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defer func() {
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for _, carg := range cargs {
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C.free(unsafe.Pointer(carg))
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}
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}()
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cargc := C.int(len(cargs))
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screenWidth := 256
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screenHeight := 240
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screenScale := 2
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C.glutInit(&cargc, &cargs[0])
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C.glutInitDisplayMode(C.GLUT_RGBA);
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C.glutInitWindowSize(C.int(screenWidth * screenScale),
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C.int(screenHeight * screenScale))
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title := C.CString("Ebiten Demo")
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defer C.free(unsafe.Pointer(title))
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C.glutCreateWindow(title)
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C.setGlutFuncs()
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ch := make(chan bool, 1)
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game := &DemoGame{}
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device = graphics.NewDevice(screenWidth, screenHeight, screenScale,
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func(g *graphics.GraphicsContext, offscreen *graphics.Texture) {
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ticket := <-ch
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game.Draw(g, offscreen)
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ch<- ticket
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})
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go func() {
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const frameTime = time.Second / 60
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tick := time.Tick(frameTime)
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for {
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<-tick
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ticket := <-ch
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game.Update()
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ch<- ticket
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}
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}()
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ch<- true
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C.glutMainLoop()
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}
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