def add_image(self, img, cache_key):
ref = self.get_image(cache_key)
if ref is not None:
return ref
fmt = img.format()
image = QImage(img)
if (image.depth() == 1 and img.colorTable().size() == 2 and
img.colorTable().at(0) == QColor(Qt.black).rgba() and
img.colorTable().at(1) == QColor(Qt.white).rgba()):
if fmt == QImage.Format_MonoLSB:
image = image.convertToFormat(QImage.Format_Mono)
fmt = QImage.Format_Mono
else:
if (fmt != QImage.Format_RGB32 and fmt != QImage.Format_ARGB32):
image = image.convertToFormat(QImage.Format_ARGB32)
fmt = QImage.Format_ARGB32
w = image.width()
h = image.height()
d = image.depth()
if fmt == QImage.Format_Mono:
bytes_per_line = (w + 7) >> 3
data = image.constBits().asstring(bytes_per_line * h)
return self.write_image(data, w, h, d, cache_key=cache_key)
has_alpha = False
soft_mask = None
if fmt == QImage.Format_ARGB32:
tmask = image.constBits().asstring(4*w*h)[self.alpha_bit::4]
sdata = bytearray(tmask)
vals = set(sdata)
vals.discard(255) # discard opaque pixels
has_alpha = bool(vals)
if has_alpha:
# Blend image onto a white background as otherwise Qt will render
# transparent pixels as black
background = QImage(image.size(), QImage.Format_ARGB32_Premultiplied)
background.fill(Qt.white)
painter = QPainter(background)
painter.drawImage(0, 0, image)
painter.end()
image = background
ba = QByteArray()
buf = QBuffer(ba)
image.save(buf, 'jpeg', 94)
data = ba.data()
if has_alpha:
soft_mask = self.write_image(tmask, w, h, 8)
return self.write_image(data, w, h, 32, dct=True,
soft_mask=soft_mask, cache_key=cache_key)
def add_image(self, img, cache_key):
ref = self.get_image(cache_key)
if ref is not None:
return ref
fmt = img.format()
image = QImage(img)
if (image.depth() == 1 and img.colorTable().size() == 2 and
img.colorTable().at(0) == QColor(Qt.black).rgba() and
img.colorTable().at(1) == QColor(Qt.white).rgba()):
if fmt == QImage.Format_MonoLSB:
image = image.convertToFormat(QImage.Format_Mono)
fmt = QImage.Format_Mono
else:
if (fmt != QImage.Format_RGB32 and fmt != QImage.Format_ARGB32):
image = image.convertToFormat(QImage.Format_ARGB32)
fmt = QImage.Format_ARGB32
w = image.width()
h = image.height()
d = image.depth()
if fmt == QImage.Format_Mono:
bytes_per_line = (w + 7) >> 3
data = image.constBits().asstring(bytes_per_line * h)
return self.write_image(data, w, h, d, cache_key=cache_key)
has_alpha = False
soft_mask = None
if fmt == QImage.Format_ARGB32:
tmask = image.constBits().asstring(4*w*h)[self.alpha_bit::4]
sdata = bytearray(tmask)
vals = set(sdata)
vals.discard(255) # discard opaque pixels
has_alpha = bool(vals)
if has_alpha:
# Blend image onto a white background as otherwise Qt will render
# transparent pixels as black
background = QImage(image.size(), QImage.Format_ARGB32_Premultiplied)
background.fill(Qt.white)
painter = QPainter(background)
painter.drawImage(0, 0, image)
painter.end()
image = background
ba = QByteArray()
buf = QBuffer(ba)
image.save(buf, 'jpeg', 94)
data = bytes(ba.data())
if has_alpha:
soft_mask = self.write_image(tmask, w, h, 8)
return self.write_image(data, w, h, 32, dct=True,
soft_mask=soft_mask, cache_key=cache_key)
