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 Initialize(window egl.NativeWindowType, configAttr, contextAttr []int32) *platform.EGLState {
var (
config egl.Config
numConfig int32
visualId int32
width, height int32
)
display := egl.GetDisplay(egl.DEFAULT_DISPLAY)
if ok := egl.Initialize(display, nil, nil); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.ChooseConfig(display, configAttr, &config, 1, &numConfig); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.GetConfigAttrib(display, config, egl.NATIVE_VISUAL_ID, &visualId); !ok {
egl.LogError(egl.GetError())
}
egl.BindAPI(egl.OPENGL_ES_API)
context := egl.CreateContext(display, config, egl.NO_CONTEXT, &contextAttr[0])
surface := egl.CreateWindowSurface(display, config, window, nil)
var val int32
if ok := egl.QuerySurface(display, surface, egl.WIDTH, &width); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.QuerySurface(display, surface, egl.HEIGHT, &height); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.GetConfigAttrib(display, config, egl.SURFACE_TYPE, &val); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.GetConfigAttrib(display, config, egl.SURFACE_TYPE, &val); !ok {
egl.LogError(egl.GetError())
}
if (val & egl.WINDOW_BIT) == 0 {
panic("No WINDOW_BIT")
}
return &platform.EGLState{
Display: display,
Config: config,
Context: context,
Surface: surface,
NumConfig: numConfig,
VisualId: visualId,
ContextAttributes: contextAttr,
ConfigAttributes: configAttr,
SurfaceWidth: int(width),
SurfaceHeight: int(height),
}
}
func Initialize(configAttr, contextAttr []int32) *platform.EGLState {
var (
config egl.Config
numConfig int32
visualId int32
width, height int32
dstRect, srcRect egl.VCRect
nativeWindow egl.EGLDispmanxWindow
)
display := egl.GetDisplay(egl.DEFAULT_DISPLAY)
if ok := egl.Initialize(egl.Display, nil, nil); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.ChooseConfig(display, configAttr, &config, 1, &numConfig); !ok {
egl.LogError(egl.GetError())
}
if ok := egl.GetConfigAttrib(display, config, egl.NATIVE_VISUAL_ID, &visualId); !ok {
egl.LogError(egl.GetError())
}
egl.BindAPI(egl.OPENGL_ES_API)
context := egl.CreateContext(display, config, egl.NO_CONTEXT, &contextAttr[0])
width, height = egl.GraphicsGetDisplaySize(0)
dstRect.X = 0
dstRect.Y = 0
dstRect.Width = int32(width)
dstRect.Height = int32(height)
srcRect.X = 0
srcRect.Y = 0
srcRect.Width = int32(width << 16)
srcRect.Height = int32(height << 16)
dispman_display := egl.VCDispmanxDisplayOpen(0)
dispman_update := egl.VCDispmanxUpdateStart(0)
dispman_element := egl.VCDispmanxElementAdd(
dispman_update,
dispman_display,
0, /*layer */
&dstRect,
0, /*src */
&srcRect,
egl.DISPMANX_PROTECTION_NONE,
nil, /*alpha */
nil, /*clamp */
0 /*transform */)
nativeWindow.Element = dispman_element
nativeWindow.Width = int(width)
nativeWindow.Height = int(height)
egl.VCDispmanxUpdateSubmitSync(dispman_update)
surface := egl.CreateWindowSurface(
display,
config,
egl.NativeWindowType(unsafe.Pointer(&nativeWindow)),
nil)
if surface == egl.NO_SURFACE {
panic("Error in creating EGL surface")
}
return &platform.EGLState{
Display: display,
Config: config,
Context: context,
Surface: surface,
NumConfig: numConfig,
VisualId: visualId,
ContextAttributes: contextAttr,
ConfigAttributes: configAttr,
SurfaceWidth: int(width),
SurfaceHeight: int(height),
}
}