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Fix high DPI rendering of column icons

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This commit is contained in:
Kovid Goyal 2016-08-25 09:20:13 +05:30
parent e7a8940f28
commit fba492a425
1 changed files with 8 additions and 10 deletions
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18
src/calibre/gui2/library/models.py
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@ -91,6 +91,7 @@ class ColumnIcon(object): # {{{
self.mi = None
self.formatter = formatter
self.model = model
self.dpr = QApplication.instance().devicePixelRatio()
def __call__(self, id_, fmts, cache_index, db, icon_cache, icon_bitmap_cache,
template_cache):
@ -121,33 +122,30 @@ class ColumnIcon(object): # {{{
icon_bitmaps = []
total_width = 0
rh = max(2, self.model.row_height - 4)
dim = int(self.dpr * rh)
for icon in icons:
d = os.path.join(config_dir, 'cc_icons', icon)
if (os.path.exists(d)):
bm = QPixmap(d)
bm = bm.scaled(128, 128, aspectRatioMode=Qt.KeepAspectRatio,
transformMode=Qt.SmoothTransformation)
bm = bm.scaled(dim, dim, aspectRatioMode=Qt.KeepAspectRatio, transformMode=Qt.SmoothTransformation)
bm.setDevicePixelRatio(self.dpr)
icon_bitmaps.append(bm)
total_width += bm.width()
if len(icon_bitmaps) > 1:
i = len(icon_bitmaps)
result = QPixmap((i * 128) + ((i-1)*2), 128)
result = QPixmap((i * dim) + ((i-1)*2), dim)
result.setDevicePixelRatio(self.dpr)
result.fill(Qt.transparent)
painter = QPainter(result)
x = 0
for bm in icon_bitmaps:
painter.drawPixmap(x, 0, bm)
x += bm.width() + 2
x += int(bm.width() / self.dpr) + 2
painter.end()
else:
result = icon_bitmaps[0]
# If the image height is less than the row height, leave it alone
# The -4 allows for a margin above and below. Also ensure that
# it is always a bit positive
rh = max(2, self.model.row_height - 4)
if result.height() > rh:
result = result.scaledToHeight(rh, mode=Qt.SmoothTransformation)
icon_cache[id_][cache_index] = result
icon_bitmap_cache[icon_string] = result
self.mi = None