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Fix high DPI rendering for the iamge editor widget in Edit Book

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This commit is contained in:
Kovid Goyal 2016-08-25 08:33:19 +05:30
parent c875d408a7
commit bc6e4b8813
1 changed files with 5 additions and 2 deletions
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7
src/calibre/gui2/tweak_book/editor/canvas.py
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@ -595,14 +595,17 @@ class Canvas(QWidget):
i = self.current_image
width, height = i.width(), i.height()
scaled, width, height = fit_image(width, height, pwidth, pheight)
dpr = self.devicePixelRatio()
if scaled:
i = self.current_image.scaled(width, height, transformMode=Qt.SmoothTransformation)
i = self.current_image.scaled(int(dpr * width), int(dpr * height), transformMode=Qt.SmoothTransformation)
self.current_scaled_pixmap = QPixmap.fromImage(i)
self.current_scaled_pixmap.setDevicePixelRatio(dpr)
@painter
def draw_pixmap(self, painter):
p = self.current_scaled_pixmap
width, height = p.width(), p.height()
dpr = self.devicePixelRatio()
width, height = int(p.width()/dpr), int(p.height()/dpr)
pwidth, pheight = self.last_canvas_size
x = int(abs(pwidth - width)/2.)
y = int(abs(pheight - height)/2.)