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improve SymbolAtlas.getSymbolCoords and ScatterPlotItem.plot performance (#1198)

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Daniel Hrisca 2020-05-30 09:08:40 +03:00 committed by GitHub
parent 99c43613f3
commit 6194245322
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1 changed files with 25 additions and 14 deletions
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39
pyqtgraph/graphicsItems/ScatterPlotItem.py
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@ -15,6 +15,7 @@ from ..pgcollections import OrderedDict
from .. import debug
from ..python2_3 import basestring
__all__ = ['ScatterPlotItem', 'SpotItem']
@ -128,8 +129,12 @@ class SymbolAtlas(object):
sourceRecti = None
symbol_map = self.symbolMap
for i, rec in enumerate(opts.tolist()):
size, symbol, pen, brush = rec[2: 6]
symbols = opts['symbol'].tolist()
sizes = opts['size'].tolist()
pens = opts['pen'].tolist()
brushes = opts['brush'].tolist()
for symbol, size, pen, brush in zip(symbols, sizes, pens, brushes):
key = id(symbol), size, id(pen), id(brush)
if key == keyi:
@ -560,6 +565,7 @@ class ScatterPlotItem(GraphicsObject):
self.invalidate()
def updateSpots(self, dataSet=None):
if dataSet is None:
dataSet = self.data
@ -610,8 +616,6 @@ class ScatterPlotItem(GraphicsObject):
recs['brush'][np.equal(recs['brush'], None)] = fn.mkBrush(self.opts['brush'])
return recs
def measureSpotSizes(self, dataSet):
for rec in dataSet:
## keep track of the maximum spot size and pixel size
@ -630,7 +634,6 @@ class ScatterPlotItem(GraphicsObject):
self._maxSpotPxWidth = max(self._maxSpotPxWidth, pxWidth)
self.bounds = [None, None]
def clear(self):
"""Remove all spots from the scatter plot"""
#self.clearItems()
@ -757,8 +760,10 @@ class ScatterPlotItem(GraphicsObject):
if self.opts['pxMode'] is True:
p.resetTransform()
data = self.data
# Map point coordinates to device
pts = np.vstack([self.data['x'], self.data['y']])
pts = np.vstack([data['x'], data['y']])
pts = self.mapPointsToDevice(pts)
if pts is None:
return
@ -770,25 +775,31 @@ class ScatterPlotItem(GraphicsObject):
# Draw symbols from pre-rendered atlas
atlas = self.fragmentAtlas.getAtlas()
target_rect = data['targetRect']
source_rect = data['sourceRect']
widths = data['width']
# Update targetRects if necessary
updateMask = viewMask & np.equal(self.data['targetRect'], None)
updateMask = viewMask & np.equal(target_rect, None)
if np.any(updateMask):
updatePts = pts[:,updateMask]
width = self.data[updateMask]['width']*2
self.data['targetRect'][updateMask] = list(imap(QtCore.QRectF, updatePts[0,:], updatePts[1,:], width, width))
width = widths[updateMask] * 2
target_rect[updateMask] = list(imap(QtCore.QRectF, updatePts[0,:], updatePts[1,:], width, width))
data = self.data[viewMask]
if QT_LIB == 'PyQt4':
p.drawPixmapFragments(data['targetRect'].tolist(), data['sourceRect'].tolist(), atlas)
p.drawPixmapFragments(
target_rect[viewMask].tolist(),
source_rect[viewMask].tolist(),
atlas
)
else:
list(imap(p.drawPixmap, data['targetRect'], repeat(atlas), data['sourceRect']))
list(imap(p.drawPixmap, target_rect[viewMask].tolist(), repeat(atlas), source_rect[viewMask].tolist()))
else:
# render each symbol individually
p.setRenderHint(p.Antialiasing, aa)
data = self.data[viewMask]
pts = pts[:,viewMask]
for i, rec in enumerate(data):
for i, rec in enumerate(data[viewMask]):
p.resetTransform()
p.translate(pts[0,i] + rec['width']/2, pts[1,i] + rec['width']/2)
drawSymbol(p, *self.getSpotOpts(rec, scale))