def get_font_array(sz, chars=DEFAULT_CHARS):
from qtpy.QtGui import QFont, QPainter, QColor
font = QFont()
font.setFixedPitch(True)
font.setPixelSize(int(sz))
font.setStyleStrategy(QFont.NoAntialias)
dummy = QImage(10, 10, QImage.Format_ARGB32)
pnt = QPainter(dummy)
pnt.setFont(font)
metric = pnt.fontMetrics()
rct = metric.boundingRect(chars)
pnt.end()
h = rct.height()
w = rct.width()
img = QImage(w, h, QImage.Format_ARGB32)
paint = QPainter()
paint.begin(img)
paint.setFont(font)
paint.setBrush(QColor(255, 255, 255))
paint.setPen(QColor(255, 255, 255))
paint.drawRect(0, 0, w + 1, h + 1)
paint.setPen(QColor(0, 0, 0))
paint.setBrush(QColor(0, 0, 0))
paint.drawText(0, paint.fontMetrics().ascent(), chars)
paint.end()
try:
try:
# PyQt4 (at least until Qt 4.8)
data = img.bits().asstring(img.numBytes())
except AttributeError:
if PYSIDE2:
# PySide2
data = bytes(img.bits())
else:
# PyQt5
data = img.bits().asstring(img.byteCount())
except SystemError:
# PyQt4 (4.11.3) and PyQt5 (5.3.2) on Python 3
return
npy = np.frombuffer(data, np.uint8)
npy.shape = img.height(), int(img.bytesPerLine() / 4), 4
return npy[:, :, 0]
