// drawLoop is the primary drawing loop.
//
// After Cocoa has created an NSWindow and called prepareOpenGL,
// it starts drawLoop on a locked goroutine to handle OpenGL calls.
//
// The screen is drawn every time a paint.Event is received, which can be
// triggered either by the user or by Cocoa via drawgl (for example, when
// the window is resized).
func drawLoop(w *windowImpl, vba uintptr) {
runtime.LockOSThread()
C.makeCurrentContext(C.uintptr_t(w.ctx))
// Starting in OS X 10.11 (El Capitan), the vertex array is
// occasionally getting unbound when the context changes threads.
//
// Avoid this by binding it again.
C.glBindVertexArray(C.GLuint(vba))
if errno := C.glGetError(); errno != 0 {
panic(fmt.Sprintf("gldriver: glBindVertexArray failed: %d", errno))
}
workAvailable := w.worker.WorkAvailable()
// TODO(crawshaw): exit this goroutine on Release.
for {
select {
case <-workAvailable:
w.worker.DoWork()
case <-w.publish:
loop:
for {
select {
case <-workAvailable:
w.worker.DoWork()
default:
break loop
}
}
C.flushContext(C.uintptr_t(w.ctx))
w.publishDone <- screen.PublishResult{}
}
}
}
func GetError() (r0 Enum) {
defer func() {
errstr := errDrain()
log.Printf("gl.GetError() %v%v", r0, errstr)
}()
return Enum(C.glGetError())
}
// GetError returns error information: an error if one occurred or nil.
func GetError() error {
e := C.glGetError()
if e == C.GL_NO_ERROR {
return nil
}
return errors.New(errorStrings[e])
}
func errDrain() string {
var errs []Enum
for {
e := Enum(C.glGetError())
if e == 0 {
break
}
errs = append(errs, e)
}
if len(errs) > 0 {
return fmt.Sprintf(" error: %v", errs)
}
return ""
}
func CreateContext(win window.Window) {
dpy := win.GetHDC()
xData := (*XWinData)(dpy)
if xData == nil {
//TODO: Handle error somehow ???
return
}
//attr := make([]C.int,)
/*
attr := []C.int{
C.GLX_RGBA,
C.GLX_DEPTH_SIZE,
24,
C.GLX_DOUBLEBUFFER,
C.None,
}
*/
//vi := C.glXChooseVisual(xData.dpy, 0, (*C.int)(unsafe.Pointer(&attr)));
vi := C.Test(xData.dpy)
tmpContext := C.glXCreateContext(xData.dpy, vi, nil, C.GL_TRUE)
err := C.glGetError()
if err != C.GL_NO_ERROR {
fmt.Println("Error")
}
C.glXMakeCurrent(xData.dpy, (C.GLXDrawable)(xData.win), tmpContext)
C.glewInit()
/*
C.glXMakeCurrent(xData.dpy)
C.glewInit()
var context C.HGLRC
if C.wglewIsSupported(C.CString("WGL_ARB_create_context")) == 1 {
//TODO: Figure out how to send attr to c func so it works!!!
context = C.openglCreateContextAttribsARB(*(*C.HDC)(hdc), nil)
C.wglMakeCurrent(nil, nil)
C.wglDeleteContext(tmpContext)
C.wglMakeCurrent(*(*C.HDC)(hdc), context)
}
*/
return
}
func InitGlew() error {
C.glewExperimental = C.GL_TRUE
err := C.glewInit()
if err != C.GLEW_OK {
// fmt.Println(C.GoString(C.glewGetErrorString(glew_err)))
return errors.New("glew error")
}
// Why did I need to do this?
C.glGetError()
return nil
}
func printerr(text string) error {
_, file, line, _ := runtime.Caller(1)
_, upperfile, upperline, _ := runtime.Caller(2)
err := C.GoString(C.SDL_GetError())
errtxt := err
if len(err) > 0 {
fmt.Println("SDL error: in ", file, " line ", line, " after ", upperfile, " line ", upperline, err, text)
}
glerr := C.glGetError()
errtxt += map[int]string{0x0500: "GL_INVALID_ENUM", 0x0501: "GL_INVALID_VALUE", 0x0502: "GL_INVALID_OPERATION", 0x0505: "GL_OUT_OF_MEMORY"}[int(glerr)]
if glerr != C.GL_NO_ERROR {
fmt.Println("GL error: in ", file, " line ", line, " after ", upperfile, " line ", upperline, glerr, "("+map[int]string{0x0500: "GL_INVALID_ENUM", 0x0501: "GL_INVALID_VALUE", 0x0502: "GL_INVALID_OPERATION", 0x0505: "GL_OUT_OF_MEMORY"}[int(glerr)]+")", text)
}
if len(errtxt) > 0 {
return errors.New(errtxt)
}
return nil
}
func Init() {
if vg != nil {
panic("blendish: already initialized")
}
C.glewExperimental = C.GL_TRUE
if C.glewInit() != C.GLEW_OK {
log.Fatalln("blendish: could not init glew (GL extensions)")
}
// GLEW generates GL error because it calls
// glGetString(GL_EXTENSIONS), we'll consume it here.
C.glGetError()
vg = C.nvgCreateGL3(C.NVG_ANTIALIAS | C.NVG_STENCIL_STROKES)
fontPath := C.CString(filepath.Join(dirs[0], "DejaVuSans.ttf"))
iconsPath := C.CString(filepath.Join(dirs[0], "blender_icons16.png"))
sys := C.CString("system")
defer C.free(unsafe.Pointer(fontPath))
defer C.free(unsafe.Pointer(iconsPath))
defer C.free(unsafe.Pointer(sys))
C.bndSetFont(C.nvgCreateFont(vg, sys, fontPath))
C.bndSetIconImage(C.nvgCreateImage(vg, iconsPath, 0))
}
func GetError() Enum {
return Enum(C.glGetError())
}
func checkGLError() {
if glErr := C.glGetError(); glErr != C.GL_NO_ERROR {
panic(fmt.Errorf("C.gl error: %v", glErr))
}
}
func GetError() Error {
return Error(C.glGetError())
}
//GLenum glGetError (void)
func GetError() GLenum {
return GLenum(C.glGetError())
}
func GetError() int {
return int(C.glGetError())
}