def requestPixmap(self, id, size, requestedSize): bytes = QByteArray(id) renderer = QSvgRenderer() renderer.load(bytes) size = renderer.defaultSize() image = QPixmap(requestedSize) painter = QPainter(image) renderer.render(painter) return image
def requestPixmap(self, id, size, requestedSize):
head = """<svg
viewBox=\"0 -1 512 2\"
xmlns=\"http://www.w3.org/2000/svg\"
xmlns:xlink=\"http://www.w3.org/1999/xlink\"
preserveAspectRatio=\"none\">\n"""
s1 = self._callback(0)
s2 = self._callback(1)
beginpoly = "<polyline points=\""
def endpoly(color):
return "\" style=\"fill:none;stroke:"+color+";stroke-width:0.03\"></polyline>"
bytes = QByteArray(head + beginpoly + s1 + endpoly("green") + beginpoly + s2 + endpoly("red") + "</svg>")
#self._iter = (self._iter + 1) % 256
#f = open('./waveforms/instantaneousWaveform%03d.svg' % self._iter, 'w')
#f.write(head + beginpoly + s1 + endpoly("green") + beginpoly + s2 + endpoly("red") + "</svg>")
#f.close()
renderer = QSvgRenderer()
worked = renderer.load(bytes)
if not worked:
print("SVG parse failed.")
size = renderer.defaultSize()
image = QPixmap(requestedSize)
image.fill(QColor(0,0,0))
painter = QPainter(image)
renderer.render(painter)
return image
def save_png (filename, sc, background = (255,255,255, 0) ) : """Create a png image from a scene :Parameters: - `filename` (str) - name to write the image - `sc` (SVGScene) - `background` (int, int, int, int) - background color as (R, G, B, alpha) 0-255 tuple """ qapp = QApplication.instance() if qapp is None : qapp = QApplication([]) r = QSvgRenderer(None) data = QByteArray(str(to_xml(sc) ) ) r.load(data) pix = QPixmap(r.defaultSize() ) pix.fill(QColor(*background) ) painter = QPainter(pix) r.render(painter) painter.end() pix.save(filename)
def save_png(filename, sc, background=(255, 255, 255, 0)):
"""Create a png image from a scene
:Parameters:
- `filename` (str) - name to write the image
- `sc` (SVGScene)
- `background` (int, int, int, int) - background color
as (R, G, B, alpha) 0-255 tuple
"""
qapp = QApplication.instance()
if qapp is None:
qapp = QApplication([])
r = QSvgRenderer(None)
data = QByteArray(str(to_xml(sc)))
r.load(data)
pix = QPixmap(r.defaultSize())
pix.fill(QColor(*background))
painter = QPainter(pix)
r.render(painter)
painter.end()
pix.save(filename)
class QLed(QWidget):
Circle = 1
Round = 2
Square = 3
Triangle = 4
Red = 1
Green = 2
Yellow = 3
Grey = 4
Orange = 5
Purple = 6
Blue = 7
shapes={
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</g>
</svg>
""",
Round:"""
<svg height="50.000000px" id="svg9493" width="100.00000px" xmlns="http://www.w3.org/2000/svg">
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}
colours={Red : (0xCF, 0x00, 0x00),
Green : (0x0f, 0x69, 0x00),
Yellow : (0xd2, 0xcd, 0x00),
Grey : (0x5a, 0x5a, 0x5a),
Orange : (0xda, 0x46, 0x15),
Purple : (0x87, 0x00, 0x83),
Blue : (0x00, 0x03, 0x9a)}
clicked=pyqtSignal()
def __init__(self, parent=None, **kwargs):
self.m_value=False
self.m_onColour=QLed.Red
self.m_offColour=QLed.Grey
self.m_shape=QLed.Circle
QWidget.__init__(self, parent, **kwargs)
self._pressed=False
self.renderer=QSvgRenderer()
def value(self): return self.m_value
def setValue(self, value):
self.m_value=value
self.update()
value=pyqtProperty(bool, value, setValue)
def onColour(self): return self.m_onColour
def setOnColour(self, newColour):
self.m_onColour=newColour
self.update()
onColour=pyqtProperty(int, onColour, setOnColour)
def offColour(self): return self.m_offColour
def setOffColour(self, newColour):
self.m_offColour=newColour
self.update()
offColour=pyqtProperty(int, offColour, setOffColour)
def shape(self): return self.m_shape
def setShape(self, newShape):
self.m_shape=newShape
self.update()
shape=pyqtProperty(int, shape, setShape)
def sizeHint(self):
if self.m_shape==QLed.Triangle: return QSize(64,48)
elif self.m_shape==QLed.Round: return QSize(96, 48)
return QSize(48,48)
def adjust(self, r, g, b):
def normalise(x): return x/255.0
def denormalise(x): return int(x*255.0)
(h,l,s)=rgb_to_hls(normalise(r),normalise(g),normalise(b))
(nr,ng,nb)=hls_to_rgb(h,l*1.5,s)
return (denormalise(nr),denormalise(ng),denormalise(nb))
def paintEvent(self, event):
option=QStyleOption()
option.initFrom(self)
h=option.rect.height()
w=option.rect.width()
if self.m_shape in (QLed.Triangle, QLed.Round):
aspect=(4/3.0) if self.m_shape==QLed.Triangle else 2.0
ah=w/aspect
aw=w
if ah>h:
ah=h
aw=h*aspect
x=abs(aw-w)/2.0
y=abs(ah-h)/2.0
bounds=QRectF(x,y,aw,ah)
else:
size=min(w,h)
x=abs(size-w)/2.0
y=abs(size-h)/2.0
bounds=QRectF(x,y,size,size)
painter=QPainter(self);
painter.setRenderHint(QPainter.Antialiasing, True);
(dark_r,dark_g,dark_b)=self.colours[self.m_onColour if self.m_value else self.m_offColour]
dark_str="rgb(%d,%d,%d)" % (dark_r,dark_g,dark_b)
light_str="rgb(%d,%d,%d)" % self.adjust(dark_r,dark_g,dark_b)
self.renderer.load(QByteArray(self.shapes[self.m_shape] % (dark_str,light_str)))
self.renderer.render(painter, bounds)
def mousePressEvent(self, event):
self._pressed=True
QWidget.mousePressEvent(self, event)
def mouseReleaseEvent(self, event):
if self._pressed:
self._pressed=False
self.clicked.emit()
QWidget.mouseReleaseEvent(self, event)
def toggleValue(self):
self.m_value=not self.m_value;
self.update()
from PyQt4.QtCore import Qt
from PyQt4.QtCore import QByteArray
from PyQt4.QtCore import QBuffer
from PyQt4.QtCore import QIODevice, QFile
from PyQt4.QtGui import QColor
from PyQt4.QtGui import QImage
from PyQt4.QtGui import QPainter
from PyQt4.QtSvg import QSvgRenderer
from PyQt4.QtGui import QApplication
import sys, os
app = QApplication(sys.argv)
svg = QSvgRenderer()
current = os.getcwd()
os.chdir(os.path.dirname(sys.argv[1]))
svg.load(os.path.basename(sys.argv[1]))
size = svg.defaultSize()
size.scale(600, 800, Qt.KeepAspectRatio)
image = QImage(size, QImage.Format_ARGB32_Premultiplied)
image.fill(QColor("white").rgb())
painter = QPainter(image)
svg.render(painter)
painter.end()
os.chdir(current)
f = QFile(sys.argv[2])
f.open(QIODevice.WriteOnly)
image.save(f, 'PNG')
