def __init__(self, display: Union[str, int], qml_view: QUrl,
gl_context: QOpenGLContext):
super().__init__()
self.qml_view = qml_view
self.display = display
self.wl_display = Display(display)
self.wl_compositor = None
self.wl_shm = None
self.wl_embedder = None
self.views = {}
self.fd_notifier = None
self.engine = Engine()
self.component = None
self.qml_view = qml_view
self.connected = False
self.gl_context = gl_context
assert gl_context.isOpenGLES()
surface = QOffscreenSurface()
surface.setFormat(gl_context.format())
surface.create()
gl_context.makeCurrent(surface)
class RenderWindow(QWindow):
def __init__(self, format):
super(RenderWindow, self).__init__()
self.setSurfaceType(QWindow.OpenGLSurface)
self.setFormat(format)
self.context = QOpenGLContext(self)
self.context.setFormat(self.requestedFormat())
if not self.context.create():
raise Exception("Unable to create GL context")
self.program = None
self.timer = None
self.angle = 0
def initGl(self):
self.program = QOpenGLShaderProgram(self)
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer()
format = self.context.format()
useNewStyleShader = format.profile() == QSurfaceFormat.CoreProfile
# Try to handle 3.0 & 3.1 that do not have the core/compatibility profile
# concept 3.2+ has. This may still fail since version 150 (3.2) is
# specified in the sources but it's worth a try.
if (format.renderableType() == QSurfaceFormat.OpenGL and format.majorVersion() == 3
and format.minorVersion() <= 1):
useNewStyleShader = not format.testOption(QSurfaceFormat.DeprecatedFunctions)
vertexShader = vertexShaderSource if useNewStyleShader else vertexShaderSource110
fragmentShader = fragmentShaderSource if useNewStyleShader else fragmentShaderSource110
if not self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, vertexShader):
raise Exception("Vertex shader could not be added: {} ({})".format(self.program.log(), vertexShader))
if not self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, fragmentShader):
raise Exception("Fragment shader could not be added: {} ({})".format(self.program.log(), fragmentShader))
if not self.program.link():
raise Exception("Could not link shaders: {}".format(self.program.log()))
self.posAttr = self.program.attributeLocation("posAttr")
self.colAttr = self.program.attributeLocation("colAttr")
self.matrixUniform = self.program.uniformLocation("matrix")
self.vbo.create()
self.vbo.bind()
self.verticesData = vertices.tobytes()
self.colorsData = colors.tobytes()
verticesSize = 4 * vertices.size
colorsSize = 4 * colors.size
self.vbo.allocate(VoidPtr(self.verticesData), verticesSize + colorsSize)
self.vbo.write(verticesSize, VoidPtr(self.colorsData), colorsSize)
self.vbo.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
if self.vao.isCreated(): # have VAO support, use it
self.setupVertexAttribs()
def setupVertexAttribs(self):
self.vbo.bind()
self.program.setAttributeBuffer(self.posAttr, GL.GL_FLOAT, 0, 2)
self.program.setAttributeBuffer(self.colAttr, GL.GL_FLOAT, 4 * vertices.size, 3)
self.program.enableAttributeArray(self.posAttr)
self.program.enableAttributeArray(self.colAttr)
self.vbo.release()
def exposeEvent(self, event):
if self.isExposed():
self.render()
if self.timer is None:
self.timer = QTimer(self)
self.timer.timeout.connect(self.slotTimer)
if not self.timer.isActive():
self.timer.start(10)
else:
if self.timer and self.timer.isActive():
self.timer.stop()
def render(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
if self.program is None:
functions.glEnable(GL.GL_DEPTH_TEST)
functions.glClearColor(0, 0, 0, 1)
self.initGl()
retinaScale = self.devicePixelRatio()
functions.glViewport(0, 0, self.width() * retinaScale,
self.height() * retinaScale)
functions.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.program.bind()
matrix = QMatrix4x4()
matrix.perspective(60, 4 / 3, 0.1, 100)
matrix.translate(0, 0, -2)
matrix.rotate(self.angle, 0, 1, 0)
self.program.setUniformValue(self.matrixUniform, matrix)
if self.vao.isCreated():
self.vao.bind()
else: # no VAO support, set the vertex attribute arrays now
self.setupVertexAttribs()
functions.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
self.vao.release()
self.program.release()
# swapInterval is 1 by default which means that swapBuffers() will (hopefully) block
# and wait for vsync.
self.context.swapBuffers(self)
self.context.doneCurrent()
def slotTimer(self):
self.render()
self.angle += 1
def glInfo(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
text = """Vendor: {}\nRenderer: {}\nVersion: {}\nShading language: {}
\nContext Format: {}\n\nSurface Format: {}""".format(
functions.glGetString(GL.GL_VENDOR), functions.glGetString(GL.GL_RENDERER),
functions.glGetString(GL.GL_VERSION),
functions.glGetString(GL.GL_SHADING_LANGUAGE_VERSION),
print_surface_format(self.context.format()),
print_surface_format(self.format()))
self.context.doneCurrent()
return text
class RenderWindow(QWindow):
def __init__(self, format):
super(RenderWindow, self).__init__()
self.setSurfaceType(QWindow.OpenGLSurface)
self.setFormat(format)
self.context = QOpenGLContext(self)
self.context.setFormat(self.requestedFormat())
if not self.context.create():
raise Exception("Unable to create GL context")
self.program = None
self.timer = None
self.angle = 0
def initGl(self):
self.program = QOpenGLShaderProgram(self)
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer()
format = self.context.format()
useNewStyleShader = format.profile() == QSurfaceFormat.CoreProfile
# Try to handle 3.0 & 3.1 that do not have the core/compatibility profile
# concept 3.2+ has. This may still fail since version 150 (3.2) is
# specified in the sources but it's worth a try.
if (format.renderableType() == QSurfaceFormat.OpenGL and format.majorVersion() == 3
and format.minorVersion() <= 1):
useNewStyleShader = not format.testOption(QSurfaceFormat.DeprecatedFunctions)
vertexShader = vertexShaderSource if useNewStyleShader else vertexShaderSource110
fragmentShader = fragmentShaderSource if useNewStyleShader else fragmentShaderSource110
if not self.program.addShaderFromSourceCode(QOpenGLShader.Vertex, vertexShader):
raise Exception("Vertex shader could not be added: {} ({})".format(self.program.log(), vertexShader))
if not self.program.addShaderFromSourceCode(QOpenGLShader.Fragment, fragmentShader):
raise Exception("Fragment shader could not be added: {} ({})".format(self.program.log(), fragmentShader))
if not self.program.link():
raise Exception("Could not link shaders: {}".format(self.program.log()))
self.posAttr = self.program.attributeLocation("posAttr")
self.colAttr = self.program.attributeLocation("colAttr")
self.matrixUniform = self.program.uniformLocation("matrix")
self.vbo.create()
self.vbo.bind()
self.verticesData = vertices.tobytes()
self.colorsData = colors.tobytes()
verticesSize = 4 * vertices.size
colorsSize = 4 * colors.size
self.vbo.allocate(VoidPtr(self.verticesData), verticesSize + colorsSize)
self.vbo.write(verticesSize, VoidPtr(self.colorsData), colorsSize)
self.vbo.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
if self.vao.isCreated(): # have VAO support, use it
self.setupVertexAttribs()
def setupVertexAttribs(self):
self.vbo.bind()
self.program.setAttributeBuffer(self.posAttr, GL.GL_FLOAT, 0, 2)
self.program.setAttributeBuffer(self.colAttr, GL.GL_FLOAT, 4 * vertices.size, 3)
self.program.enableAttributeArray(self.posAttr)
self.program.enableAttributeArray(self.colAttr)
self.vbo.release()
def exposeEvent(self, event):
if self.isExposed():
self.render()
if self.timer is None:
self.timer = QTimer(self)
self.timer.timeout.connect(self.slotTimer)
self.timer.start(10)
def render(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
if self.program is None:
functions.glEnable(GL.GL_DEPTH_TEST)
functions.glClearColor(0, 0, 0, 1)
self.initGl()
functions.glViewport(0, 0, self.width(), self.height())
functions.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
self.program.bind()
matrix = QMatrix4x4()
matrix.perspective(60, 4 / 3, 0.1, 100)
matrix.translate(0, 0, -2)
matrix.rotate(self.angle, 0, 1, 0)
self.program.setUniformValue(self.matrixUniform, matrix)
if self.vao.isCreated():
self.vao.bind()
else: # no VAO support, set the vertex attribute arrays now
self.setupVertexAttribs()
functions.glDrawArrays(GL.GL_TRIANGLES, 0, 3)
self.vao.release()
self.program.release()
# swapInterval is 1 by default which means that swapBuffers() will (hopefully) block
# and wait for vsync.
self.context.swapBuffers(self)
self.context.doneCurrent()
def slotTimer(self):
self.render()
self.angle += 1
def glInfo(self):
if not self.context.makeCurrent(self):
raise Exception("makeCurrent() failed")
functions = self.context.functions()
text = "Vendor: {}\nRenderer: {}\nVersion: {}\nShading language: {}".format(
functions.glGetString(GL.GL_VENDOR), functions.glGetString(GL.GL_RENDERER),
functions.glGetString(GL.GL_VERSION),
functions.glGetString(GL.GL_SHADING_LANGUAGE_VERSION))
self.context.doneCurrent()
return text
def initialize(self, size: QSize, shareContext: QOpenGLContext) -> None:
"""
Initialize offscreen renderer.
Args:
size: The size of the area available for rendering.
shareContext: OpenGL context used as a share context.
Raises:
RuntimeError: If the renderer has already been initialized.
"""
print(f'QmlOffscreenRenderer.initialize: {size}')
if self.initialized:
raise RuntimeError('Already initialized')
context = QOpenGLContext()
context.setShareContext(shareContext)
context.setFormat(get_default_format(gles=False))
context.create()
assert not context.isOpenGLES(), "We need glGetTexImage from OpenGL"
self.size = size
# Create offscreen surface with initialized format
surface = QOffscreenSurface()
surface.setFormat(context.format())
surface.create()
self.ctx = RenderContext(context, surface)
# Set up quick rendering
self._control = control = QQuickRenderControl()
self._window = window = QQuickWindow(control)
self._cursor = self._window.cursor()
# Don't polish/sync/render immediately for better performance, use a timer
self._renderTimer = renderTimer = QTimer()
renderTimer.setSingleShot(True)
renderTimer.setInterval(5)
renderTimer.timeout.connect(self._onRenderTimer)
self._syncTimer = syncTimer = QTimer()
syncTimer.setSingleShot(True)
syncTimer.setInterval(5)
syncTimer.timeout.connect(self._onSyncTimer)
syncTimer.destroyed.connect(self._onSyncTimerDestroyed)
# Request to create frame buffer
window.sceneGraphInitialized.connect(self._onSceneGraphInitialized)
# Request to release frame buffer
window.sceneGraphInvalidated.connect(self._onSceneGraphInvalidated)
# Only render is needed
control.renderRequested.connect(self._onRenderRequested)
# Polish, sync & render
control.sceneChanged.connect(self._onSceneChanged)
self.initialized = True
# Attach root item
self.rootItem.setParentItem(self._window.contentItem())
self._window.contentItem().forceActiveFocus()
self._updateSizes()
self.ctx.makeCurrent()
self._control.initialize(self.ctx.glContext)
def initialize(self, size: QSize, shareContext: QOpenGLContext) -> None:
"""
Initialize offscreen renderer.
Args:
size: The size of the area available for rendering.
shareContext: OpenGL context used as a share context.
Raises:
RuntimeError: If the renderer has already been initialized.
"""
print(f'QmlOffscreenRenderer.initialize: {size}')
if self.initialized:
raise RuntimeError('Already initialized')
format = QSurfaceFormat()
format.setDepthBufferSize(16)
format.setStencilBufferSize(8)
context = QOpenGLContext()
context.setFormat(format)
context.setShareContext(shareContext)
context.create()
self.size = size
self.context = context
# Create offscreen surface with initialized format
self._surface = surface = QOffscreenSurface()
surface.setFormat(context.format())
surface.create()
# Set up quick rendering
self._control = control = QQuickRenderControl()
self._window = window = QQuickWindow(control)
self._engine = engine = QQmlEngine()
if not engine.incubationController():
engine.setIncubationController(window.incubationController())
# Don't polish/sync/render immediately for better performance, use a timer
self._renderTimer = renderTimer = QTimer()
renderTimer.setSingleShot(True)
renderTimer.setInterval(5)
renderTimer.timeout.connect(self._onRenderTimer)
self._syncTimer = syncTimer = QTimer()
syncTimer.setSingleShot(True)
syncTimer.setInterval(5)
syncTimer.timeout.connect(self._onSyncTimer)
syncTimer.destroyed.connect(self._onSyncTimerDestroyed)
# Request to create frame buffer
window.sceneGraphInitialized.connect(self._onSceneGraphInitialized)
# Request to release frame buffer
window.sceneGraphInvalidated.connect(self._onSceneGraphInvalidated)
# Only render is needed
control.renderRequested.connect(self._onRenderRequested)
# Polish, sync & render
control.sceneChanged.connect(self._onSceneChanged)
self.initialized = True
# Load QML component
self._component = component = QQmlComponent(self._engine, self.qmlUrl)
if component.isLoading():
component.statusChanged.connect(self._onComponentStatusChanged)
else:
self._attachRootItem()