120 lines
4.6 KiB
Python
120 lines
4.6 KiB
Python
from .Exporter import Exporter
|
|
from ..parametertree import Parameter
|
|
from ..Qt import QtGui, QtCore, QtSvg, QT_LIB
|
|
from .. import functions as fn
|
|
import numpy as np
|
|
|
|
translate = QtCore.QCoreApplication.translate
|
|
__all__ = ['ImageExporter']
|
|
|
|
class ImageExporter(Exporter):
|
|
Name = "Image File (PNG, TIF, JPG, ...)"
|
|
allowCopy = True
|
|
|
|
def __init__(self, item):
|
|
Exporter.__init__(self, item)
|
|
tr = self.getTargetRect()
|
|
if isinstance(item, QtGui.QGraphicsItem):
|
|
scene = item.scene()
|
|
else:
|
|
scene = item
|
|
bgbrush = scene.views()[0].backgroundBrush()
|
|
bg = bgbrush.color()
|
|
if bgbrush.style() == QtCore.Qt.BrushStyle.NoBrush:
|
|
bg.setAlpha(0)
|
|
|
|
self.params = Parameter(name='params', type='group', children=[
|
|
{'name': 'width', 'title': translate("Exporter", 'width'), 'type': 'int', 'value': int(tr.width()),
|
|
'limits': (0, None)},
|
|
{'name': 'height', 'title': translate("Exporter", 'height'), 'type': 'int', 'value': int(tr.height()),
|
|
'limits': (0, None)},
|
|
{'name': 'antialias', 'title': translate("Exporter", 'antialias'), 'type': 'bool', 'value': True},
|
|
{'name': 'background', 'title': translate("Exporter", 'background'), 'type': 'color', 'value': bg},
|
|
{'name': 'invertValue', 'title': translate("Exporter", 'invertValue'), 'type': 'bool', 'value': False}
|
|
])
|
|
self.params.param('width').sigValueChanged.connect(self.widthChanged)
|
|
self.params.param('height').sigValueChanged.connect(self.heightChanged)
|
|
|
|
def widthChanged(self):
|
|
sr = self.getSourceRect()
|
|
ar = float(sr.height()) / sr.width()
|
|
self.params.param('height').setValue(int(self.params['width'] * ar), blockSignal=self.heightChanged)
|
|
|
|
def heightChanged(self):
|
|
sr = self.getSourceRect()
|
|
ar = float(sr.width()) / sr.height()
|
|
self.params.param('width').setValue(int(self.params['height'] * ar), blockSignal=self.widthChanged)
|
|
|
|
def parameters(self):
|
|
return self.params
|
|
|
|
@staticmethod
|
|
def getSupportedImageFormats():
|
|
filter = ["*."+f.data().decode('utf-8') for f in QtGui.QImageWriter.supportedImageFormats()]
|
|
preferred = ['*.png', '*.tif', '*.jpg']
|
|
for p in preferred[::-1]:
|
|
if p in filter:
|
|
filter.remove(p)
|
|
filter.insert(0, p)
|
|
return filter
|
|
|
|
def export(self, fileName=None, toBytes=False, copy=False):
|
|
if fileName is None and not toBytes and not copy:
|
|
filter = self.getSupportedImageFormats()
|
|
self.fileSaveDialog(filter=filter)
|
|
return
|
|
|
|
w = int(self.params['width'])
|
|
h = int(self.params['height'])
|
|
if w == 0 or h == 0:
|
|
raise Exception("Cannot export image with size=0 (requested "
|
|
"export size is %dx%d)" % (w, h))
|
|
|
|
targetRect = QtCore.QRect(0, 0, w, h)
|
|
sourceRect = self.getSourceRect()
|
|
|
|
bg = np.empty((h, w, 4), dtype=np.ubyte)
|
|
color = self.params['background']
|
|
bg[:,:,0] = color.blue()
|
|
bg[:,:,1] = color.green()
|
|
bg[:,:,2] = color.red()
|
|
bg[:,:,3] = color.alpha()
|
|
|
|
self.png = fn.makeQImage(bg, alpha=True, copy=False, transpose=False)
|
|
self.bg = bg
|
|
|
|
## set resolution of image:
|
|
origTargetRect = self.getTargetRect()
|
|
resolutionScale = targetRect.width() / origTargetRect.width()
|
|
#self.png.setDotsPerMeterX(self.png.dotsPerMeterX() * resolutionScale)
|
|
#self.png.setDotsPerMeterY(self.png.dotsPerMeterY() * resolutionScale)
|
|
|
|
painter = QtGui.QPainter(self.png)
|
|
#dtr = painter.deviceTransform()
|
|
try:
|
|
self.setExportMode(True, {
|
|
'antialias': self.params['antialias'],
|
|
'background': self.params['background'],
|
|
'painter': painter,
|
|
'resolutionScale': resolutionScale})
|
|
painter.setRenderHint(QtGui.QPainter.RenderHint.Antialiasing, self.params['antialias'])
|
|
self.getScene().render(painter, QtCore.QRectF(targetRect), QtCore.QRectF(sourceRect))
|
|
finally:
|
|
self.setExportMode(False)
|
|
painter.end()
|
|
|
|
if self.params['invertValue']:
|
|
mn = bg[...,:3].min(axis=2)
|
|
mx = bg[...,:3].max(axis=2)
|
|
d = (255 - mx) - mn
|
|
bg[...,:3] += d[...,np.newaxis]
|
|
|
|
if copy:
|
|
QtGui.QApplication.clipboard().setImage(self.png)
|
|
elif toBytes:
|
|
return self.png
|
|
else:
|
|
return self.png.save(fileName)
|
|
|
|
ImageExporter.register()
|