def __init__(self, parent=None, **kw):
# Qt init
QLabel.__init__(self, parent)
self._signalRedisplay.connect(self.update)
self.setAutoFillBackground(False)
self.setMouseTracking(True)
# OS Mesa init
self.__dirtyPixmap = True
self.__context = mesa.OSMesaCreateContext(mesa.OSMESA_BGRA, None)
assert self.__context != 0
# OpenGL Plot backend init
OpenGLPlotCanvas.__init__(self, parent, **kw)
def resizeEvent(self, event):
width, height = self.size().width(), self.size().height()
# Update underlying pixmap
self.__dirtyPixmap = True
self.__pixmap = np.empty((height, width, 4), dtype=np.uint8)
errCode = mesa.OSMesaMakeCurrent(self.__context, self.__pixmap,
gl.GL_UNSIGNED_BYTE, width, height)
assert errCode == gl.GL_TRUE
mesa.OSMesaPixelStore(mesa.OSMESA_Y_UP, 0)
self.makeCurrent()
gl.testGL()
self.initializeGL()
self.resizeGL(width, height)
QLabel.resizeEvent(self, event)
def resizeEvent(self, event):
width, height = self.size().width(), self.size().height()
# Update underlying pixmap
self.__dirtyPixmap = True
self.__pixmap = np.empty((height, width, 4), dtype=np.uint8)
errCode = mesa.OSMesaMakeCurrent(self.__context,
self.__pixmap,
gl.GL_UNSIGNED_BYTE,
width,
height)
assert errCode == gl.GL_TRUE
mesa.OSMesaPixelStore(mesa.OSMESA_Y_UP, 0)
self.makeCurrent()
gl.testGL()
self.initializeGL()
self.resizeGL(width, height)
QLabel.resizeEvent(self, event)
def paintEvent(self, event):
# Only refresh content when paint comes from backend
if self.__dirtyPixmap:
self.__dirtyPixmap = False
height, width = self.__pixmap.shape[0:2]
assert width == self.size().width()
assert height == self.size().height()
errCode = mesa.OSMesaMakeCurrent(self.__context, self.__pixmap,
gl.GL_UNSIGNED_BYTE, width,
height)
assert errCode == gl.GL_TRUE
self.makeCurrent()
self.paintGL()
gl.glFinish()
image = QImage(self.__pixmap.data, width, height,
QImage.Format_ARGB32)
self.setPixmap(QPixmap.fromImage(image))
QLabel.paintEvent(self, event)
def paintEvent(self, event):
# Only refresh content when paint comes from backend
if self.__dirtyPixmap:
self.__dirtyPixmap = False
height, width = self.__pixmap.shape[0:2]
assert width == self.size().width()
assert height == self.size().height()
errCode = mesa.OSMesaMakeCurrent(self.__context,
self.__pixmap,
gl.GL_UNSIGNED_BYTE,
width,
height)
assert errCode == gl.GL_TRUE
self.makeCurrent()
self.paintGL()
gl.glFinish()
image = QImage(self.__pixmap.data, width, height,
QImage.Format_ARGB32)
self.setPixmap(QPixmap.fromImage(image))
QLabel.paintEvent(self, event)
def setCursor(self, cursor=CURSOR_DEFAULT):
cursor = self._CURSORS[cursor]
QLabel.setCursor(self, QCursor(cursor))
