def expose_event(event): if not window.isExposed(): return global device gl_context.makeCurrent(window) if not device: device = QOpenGLPaintDevice() gl_prepare() device.setSize(window.size()) redisplay()
def renderNow(self): if not self.isExposed(): return self.m_update_pending = False needsInitialize = False if self.m_context is None: self.m_context = QOpenGLContext(self) self.m_context.setFormat(self.requestedFormat()) self.m_context.create() needsInitialize = True self.m_context.makeCurrent(self) if needsInitialize: # Sorry, no support for higher versions for now. profile = QOpenGLVersionProfile() profile.setVersion(2, 0) self.m_gl = self.m_context.versionFunctions(profile) self.m_gl.initializeOpenGLFunctions() #print(self.m_context.hasExtension('GL_EXT_framebuffer_object')) #print(self.m_context.hasExtension('GL_ARB_texture_float')) #print(*sorted(self.m_context.extensions()), sep='\n') # Small hack. Guess noone mind? import ctypes import ctypes.util GL = ctypes.CDLL(ctypes.util.find_library('GL')) self.addGlFunctuins(GL, { 'glFramebufferTexture2D': (ctypes.c_uint, ctypes.c_uint, ctypes.c_uint, ctypes.c_uint, ctypes.c_int) }) self.logger = QOpenGLDebugLogger() self.logger.initialize() self.logger.loggedMessages() self.logger.messageLogged.connect(self.handleLoggedMassage) self.logger.startLogging() self.initialize(self.m_gl) if not self.m_device: self.m_device = QOpenGLPaintDevice() self.m_gl.glClear(self.m_gl.GL_COLOR_BUFFER_BIT | self.m_gl.GL_DEPTH_BUFFER_BIT); self.m_device.setSize(self.size()) painter = QPainter(self.m_device) painter.beginNativePainting() self.render(self.m_gl) painter.endNativePainting() self.paint(painter) self.m_context.swapBuffers(self) if self.m_animating: self.renderLater()
class OpenGLWindow(QWindow): def __init__(self, parent=None): super(OpenGLWindow, self).__init__(parent) self.m_update_pending = False self.m_animating = False self.m_context = None self.m_device = None self.m_gl = None self.logger = None self.setSurfaceType(QWindow.OpenGLSurface) def initialize(self, gl): pass def setAnimating(self, animating): self.m_animating = animating if animating: self.renderLater() def renderLater(self): if not self.m_update_pending: self.m_update_pending = True QGuiApplication.postEvent(self, QEvent(QEvent.UpdateRequest)) def paint(self, painter): pass def render(self, gl): pass def addGlFunctuins(self, GL, functions): for function, arguments in functions.items(): GL[function].restype = None GL[function].argtypes = arguments setattr(self.m_gl, function, GL[function]) @exitOnKeyboardInterrupt def renderNow(self): if not self.isExposed(): return self.m_update_pending = False needsInitialize = False if self.m_context is None: self.m_context = QOpenGLContext(self) self.m_context.setFormat(self.requestedFormat()) self.m_context.create() needsInitialize = True self.m_context.makeCurrent(self) if needsInitialize: # Sorry, no support for higher versions for now. profile = QOpenGLVersionProfile() profile.setVersion(2, 0) self.m_gl = self.m_context.versionFunctions(profile) self.m_gl.initializeOpenGLFunctions() #print(self.m_context.hasExtension('GL_EXT_framebuffer_object')) #print(self.m_context.hasExtension('GL_ARB_texture_float')) #print(*sorted(self.m_context.extensions()), sep='\n') # Small hack. Guess noone mind? import ctypes import ctypes.util GL = ctypes.CDLL(ctypes.util.find_library('GL')) self.addGlFunctuins(GL, { 'glFramebufferTexture2D': (ctypes.c_uint, ctypes.c_uint, ctypes.c_uint, ctypes.c_uint, ctypes.c_int) }) self.logger = QOpenGLDebugLogger() self.logger.initialize() self.logger.loggedMessages() self.logger.messageLogged.connect(self.handleLoggedMassage) self.logger.startLogging() self.initialize(self.m_gl) if not self.m_device: self.m_device = QOpenGLPaintDevice() self.m_gl.glClear(self.m_gl.GL_COLOR_BUFFER_BIT | self.m_gl.GL_DEPTH_BUFFER_BIT); self.m_device.setSize(self.size()) painter = QPainter(self.m_device) painter.beginNativePainting() self.render(self.m_gl) painter.endNativePainting() self.paint(painter) self.m_context.swapBuffers(self) if self.m_animating: self.renderLater() def handleLoggedMassage(self, message): # This three really annoyng and brings no useful info =\ if not (message.message().find('Use glDrawRangeElements() to avoid this.') > -1 or message.message().find('CPU mapping a busy miptree') > -1 or message.message().find('Flushing before mapping a referenced bo.') > -1 ): print(message.message().strip()) def event(self, event): if event.type() == QEvent.UpdateRequest: self.renderNow() return True return super(OpenGLWindow, self).event(event) def exposeEvent(self, event): self.renderNow() def resizeEvent(self, event): self.renderNow()