func (state *renderState) init(eglState *platform.EGLState) error {
state.eglState = eglState
display := eglState.Display
surface := eglState.Surface
context := eglState.Context
width := eglState.SurfaceWidth
height := eglState.SurfaceHeight
if ok := egl.MakeCurrent(display, surface, surface, context); !ok {
return egl.NewError(egl.GetError())
}
// Create and setup the 3D world
state.world = cubelib.NewWorld(width, height)
state.world.SetCamera(0.0, 0.0, 5.0)
state.cube = cubelib.NewCube()
if err := state.cube.AttachTextureFromFile(TEXTURE_PNG); err != nil {
return err
}
state.world.Attach(state.cube)
state.angle = 0.0
return nil
}
// MakeContextCurrent bind the OpenGL context to the current thread.
func (win *window) MakeContextCurrent() {
if ok := egl.MakeCurrent(
win.eglState.Display,
win.eglState.Surface,
win.eglState.Surface,
win.eglState.Context); !ok {
Fatalf("%s", egl.NewError(egl.GetError()))
}
}
func (m *mainLoop) loop(init chan<- struct{}) {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
looper := C.ALooper_prepare(C.ALOOPER_PREPARE_ALLOW_NON_CALLBACKS)
if looper == nil {
panic("ALooper_prepare returned nil")
}
m.looper = looper
init <- struct{}{}
for {
select {
case <-m.quit:
if m.renderState != nil && m.renderState.ctx != egl.Context(unsafe.Pointer(nil)) {
if !egl.MakeCurrent(m.renderState.disp, egl.Surface(unsafe.Pointer(nil)), egl.Surface(unsafe.Pointer(nil)), egl.Context(unsafe.Pointer(nil))) {
panic("Error: eglMakeCurrent() failed\n")
}
}
m.ack <- struct{}{}
break
case <-m.resume:
m.running = true
m.ack <- struct{}{}
case <-m.pause:
m.running = false
m.width, m.height = 0, 0
m.ack <- struct{}{}
case m.focused = <-m.focus:
m.width, m.height = 0, 0
m.ack <- struct{}{}
case m.renderState = <-m.render:
m.ack <- struct{}{}
case inputQ := <-m.input:
if inputQ != nil {
C.AInputQueue_attachLooper(inputQ, m.looper, LOOPER_ID_INPUT, nil, nil)
} else {
C.AInputQueue_detachLooper(m.inputQ)
}
m.inputQ = inputQ
m.ack <- struct{}{}
default:
m.frame()
}
}
}
func (t *testCreateEGLContextSuite) TestMakeCurrent() {
egl.BindAPI(egl.OPENGL_ES_API)
context := egl.CreateContext(
t.display,
t.config,
egl.NO_CONTEXT,
&contextAttr[0])
surface := egl.CreateWindowSurface(
t.display,
t.config,
testWin,
nil)
t.True(egl.MakeCurrent(
t.display,
surface,
surface,
context,
))
}
func (m *mainLoop) frame() {
var timeout C.int = 0
if !m.isRunning() {
timeout = -1
}
ident := C.ALooper_pollAll(timeout, nil, nil, nil)
switch ident {
case LOOPER_ID_INPUT:
if m.inputQ != nil {
m.processInput(m.inputQ)
}
case C.ALOOPER_POLL_ERROR:
log.Fatalf("ALooper_pollAll returned ALOOPER_POLL_ERROR\n")
}
if m.isRunning() {
m.checkSize()
createCtx := m.renderState.ctx == egl.Context(unsafe.Pointer(nil))
if createCtx {
log.Printf("Creating context\n")
ctx_attribs := [...]int32{
egl.CONTEXT_CLIENT_VERSION, 2,
egl.NONE,
}
m.renderState.ctx = egl.CreateContext(m.renderState.disp, m.renderState.conf, egl.NO_CONTEXT, &ctx_attribs[0])
if m.renderState.ctx == egl.Context(unsafe.Pointer(nil)) {
panic("Error: eglCreateContext failed\n")
}
}
if !egl.MakeCurrent(m.renderState.disp, m.renderState.surf, m.renderState.surf, m.renderState.ctx) {
panic("Error: eglMakeCurrent() failed\n")
}
if createCtx {
m.game.initGL()
}
m.game.drawFrame()
egl.SwapBuffers(m.renderState.disp, m.renderState.surf)
}
}
