def drag_icon(self, cover, multiple):
cover = cover.scaledToHeight(120,
Qt.TransformationMode.SmoothTransformation)
if multiple:
base_width = cover.width()
base_height = cover.height()
base = QImage(base_width + 21, base_height + 21,
QImage.Format.Format_ARGB32_Premultiplied)
base.fill(QColor(255, 255, 255, 0).rgba())
p = QPainter(base)
rect = QRect(20, 0, base_width, base_height)
p.fillRect(rect, QColor('white'))
p.drawRect(rect)
rect.moveLeft(10)
rect.moveTop(10)
p.fillRect(rect, QColor('white'))
p.drawRect(rect)
rect.moveLeft(0)
rect.moveTop(20)
p.fillRect(rect, QColor('white'))
p.save()
p.setCompositionMode(
QPainter.CompositionMode.CompositionMode_SourceAtop)
p.drawImage(rect.topLeft(), cover)
p.restore()
p.drawRect(rect)
p.end()
cover = base
return QPixmap.fromImage(cover)
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.GlobalColor.black).rgba() and
img.colorTable().at(1) == QColor(Qt.GlobalColor.white).rgba()):
if fmt == QImage.Format.Format_MonoLSB:
image = image.convertToFormat(QImage.Format.Format_Mono)
fmt = QImage.Format.Format_Mono
else:
if (fmt != QImage.Format.Format_RGB32 and fmt != QImage.Format.Format_ARGB32):
image = image.convertToFormat(QImage.Format.Format_ARGB32)
fmt = QImage.Format.Format_ARGB32
w = image.width()
h = image.height()
d = image.depth()
if fmt == QImage.Format.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.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.Format_ARGB32_Premultiplied)
background.fill(Qt.GlobalColor.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 __call__(self, canvas):
if canvas.has_selection and canvas.selection_state.rect is not None:
pimg = self.after_image
img = self.after_image = QImage(canvas.current_image)
rect = QRectF(*get_selection_rect(img, canvas.selection_state.rect, canvas.target))
p = QPainter(img)
p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform, True)
p.drawImage(rect, pimg, QRectF(pimg.rect()))
p.end()
return self.after_image
