def _render_offscreen(self, drawable, data, dst_x, dst_y, width, height):
# NOTE [A]
daht, dawd, depth = data.shape
self.logger.debug("data shape is %dx%dx%d" % (dawd, daht, depth))
# Get qimage for copying pixel data
qimage = self._get_qimage(data)
painter = QPainter(drawable)
painter.setWorldMatrixEnabled(True)
# fill pixmap with background color
imgwin_wd, imgwin_ht = self.get_window_size()
bgclr = self._get_color(*self.img_bg)
painter.fillRect(QtCore.QRect(0, 0, imgwin_wd, imgwin_ht), bgclr)
# draw image data from buffer to offscreen pixmap
painter.drawImage(QtCore.QRect(dst_x, dst_y, width, height), qimage,
QtCore.QRect(0, 0, width, height))
# Draw a cross in the center of the window in debug mode
if self.t_['show_pan_position']:
clr = QColor()
clr.setRgbF(1.0, 0.0, 0.0)
painter.setPen(clr)
ctr_x, ctr_y = self.get_center()
painter.drawLine(ctr_x - 10, ctr_y, ctr_x + 10, ctr_y)
painter.drawLine(ctr_x, ctr_y - 10, ctr_x, ctr_y + 10)
# render self.message
if self.message:
self._draw_message(painter, imgwin_wd, imgwin_ht, self.message)
def render_image(self, rgbobj, dst_x, dst_y):
"""Render the image represented by (rgbobj) at dst_x, dst_y
in the pixel space.
*** internal method-- do not use ***
"""
self.logger.debug("redraw surface=%s" % (self.surface))
if self.surface is None:
return
self.logger.debug("drawing to surface")
# Prepare array for rendering
# TODO: what are options for high bit depth under Qt?
data = rgbobj.get_array(self.rgb_order, dtype=np.uint8)
(height, width) = data.shape[:2]
daht, dawd, depth = data.shape
self.logger.debug("data shape is %dx%dx%d" % (dawd, daht, depth))
# Get qimage for copying pixel data
qimage = self._get_qimage(data)
drawable = self.surface
painter = QPainter(drawable)
#painter.setWorldMatrixEnabled(True)
# fill surface with background color
size = drawable.size()
sf_wd, sf_ht = size.width(), size.height()
bg = self.viewer.img_bg
bgclr = self._get_color(*bg)
painter.fillRect(QtCore.QRect(0, 0, sf_wd, sf_ht), bgclr)
# draw image data from buffer to offscreen pixmap
painter.drawImage(QtCore.QRect(dst_x, dst_y, width, height), qimage,
QtCore.QRect(0, 0, width, height))
def setup_cr(self):
cr = QPainter(self.viewer.pixmap)
pen = QPen()
pen.setWidth(getattr(self, 'linewidth', 1))
if hasattr(self, 'linestyle'):
if self.linestyle == 'dash':
pen.setDashPattern([3.0, 4.0, 6.0, 4.0])
pen.setDashOffset(5.0)
alpha = getattr(self, 'alpha', 1.0)
color = self.__get_color(self.color, alpha)
pen.setColor(color)
cr.setPen(pen)
fill = getattr(self, 'fill', False)
if fill:
if hasattr(self, 'fillcolor') and self.fillcolor:
color = self.fillcolor
else:
color = self.color
if not color:
cr.setBrush(QtCore.Qt.NoBrush)
else:
alpha = getattr(self, 'fillalpha', alpha)
color = self.__get_color(color, alpha)
cr.setBrush(color)
else:
cr.setBrush(QtCore.Qt.NoBrush)
return cr
def setup_cr(self):
cr = QPainter(self.fitsimage.pixmap)
pen = QPen()
if hasattr(self, 'linewidth'):
pen.setWidth(self.linewidth)
else:
pen.setWidth(1)
if hasattr(self, 'linestyle'):
if self.linestyle == 'dash':
pen.setDashPattern([3.0, 4.0, 6.0, 4.0])
pen.setDashOffset(5.0)
color = self.__get_color(self.color)
pen.setColor(color)
cr.setPen(pen)
if hasattr(self, 'fill') and self.fill:
if hasattr(self, 'fillcolor') and self.fillcolor:
color = self.fillcolor
else:
color = self.color
if not color:
cr.setBrush(QtCore.Qt.NoBrush)
else:
color = self.__get_color(color)
cr.setBrush(color)
else:
cr.setBrush(QtCore.Qt.NoBrush)
return cr
def repaint(self, rect):
x1, y1, x2, y2 = rect.getCoords()
width = x2 - x1
height = y2 - y1
# redraw the screen from backing pixmap
#print "copying pixmap to widget"
painter = QPainter(self)
rect = QtCore.QRect(x1, y1, width, height)
painter.drawPixmap(rect, self.pixmap, rect)
def paintEvent(self, event):
"""When an area of the window is exposed, we just copy out of the
server-side, off-screen pixmap to that area.
"""
if not self.pixmap:
return
rect = event.rect()
x1, y1, x2, y2 = rect.getCoords()
width = x2 - x1
height = y2 - y1
# redraw the screen from backing pixmap
painter = QPainter(self)
rect = QtCore.QRect(x1, y1, width, height)
painter.drawPixmap(rect, self.pixmap, rect)
def update_image(self):
if (not self.pixmap) or (not self.imgwin):
return
if isinstance(self.renderer.surface, QPixmap):
# optimization when Qt is used as the renderer:
# if renderer surface is already an offscreen QPixmap
# then we can update the window directly from it
#self.pixmap = self.renderer.surface
pass
else:
if isinstance(self.renderer.surface, QImage):
# optimization when Qt is used as the renderer:
# renderer surface is already a QImage
qimage = self.renderer.surface
else:
# otherwise, get the render surface as an array and
# convert to a QImage
try:
arr = self.renderer.get_surface_as_array(order='BGRA')
qimage = self._get_qimage(arr, QImage.Format_RGB32)
except Exception as e:
self.logger.error("Error from renderer: %s" % (str(e)))
return
# copy image from renderer to offscreen pixmap
painter = QPainter(self.pixmap)
#painter.setWorldMatrixEnabled(True)
# fill surface with background color
size = self.pixmap.size()
width, height = size.width(), size.height()
# draw image data from buffer to offscreen pixmap
painter.drawImage(QtCore.QRect(0, 0, width, height),
qimage,
QtCore.QRect(0, 0, width, height))
self.logger.debug("updating window from pixmap")
if hasattr(self, 'scene'):
imgwin_wd, imgwin_ht = self.get_window_size()
self.scene.invalidate(0, 0, imgwin_wd, imgwin_ht,
QtGui.QGraphicsScene.BackgroundLayer)
else:
self.imgwin.update()
def _render_offscreen(self, drawable, data, dst_x, dst_y, width, height):
# NOTE [A]
daht, dawd, depth = data.shape
self.logger.debug("data shape is %dx%dx%d" % (dawd, daht, depth))
# Get qimage for copying pixel data
qimage = self._get_qimage(data)
painter = QPainter(drawable)
painter.setWorldMatrixEnabled(True)
# fill pixmap with background color
imgwin_wd, imgwin_ht = self.get_window_size()
bgclr = self._get_color(*self.img_bg)
painter.fillRect(QtCore.QRect(0, 0, imgwin_wd, imgwin_ht), bgclr)
# draw image data from buffer to offscreen pixmap
painter.drawImage(QtCore.QRect(dst_x, dst_y, width, height), qimage,
QtCore.QRect(0, 0, width, height))
def resize(self, dims):
"""Resize our drawing area to encompass a space defined by the
given dimensions.
"""
width, height = dims[:2]
self.logger.debug("renderer reconfigured to %dx%d" % (width, height))
if self.surface_type == 'qpixmap':
self.surface = QPixmap(width, height)
else:
self.surface = QImage(width, height, self.qimg_fmt)
# fill surface with background color;
# this reduces unwanted garbage in the resizing window
painter = QPainter(self.surface)
size = self.surface.size()
sf_wd, sf_ht = size.width(), size.height()
bg = self.viewer.img_bg
bgclr = self._get_color(*bg)
painter.fillRect(QtCore.QRect(0, 0, sf_wd, sf_ht), bgclr)
def __init__(self, viewer):
self.viewer = viewer
# TODO: encapsulate this drawable
self.cr = QPainter(self.viewer.pixmap)
def __init__(self, renderer, viewer, surface):
render.RenderContextBase.__init__(self, renderer, viewer)
self.cr = QPainter(surface)
self.cr.setRenderHint(QPainter.Antialiasing)
def __init__(self, viewer):
self.viewer = viewer
# TODO: encapsulate this drawable
self.cr = QPainter(self.viewer.pixmap)
self.cr.setRenderHint(QPainter.Antialiasing)
def setup_cr(self):
cr = QPainter(self.pixmap)
pen = QPen()
pen.setWidth(1)
cr.setPen(pen)
return cr
