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Fix hidpi image rendering in the diff viewer

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This commit is contained in:
Kovid Goyal 2016-08-26 14:59:20 +05:30
parent c2c39fa044
commit 65bcc48822
1 changed files with 13 additions and 3 deletions
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16
src/calibre/gui2/tweak_book/diff/view.py
View File

@ -331,6 +331,7 @@ class TextBrowser(PlainTextEdit): # {{{
w = self.viewport().rect().width()
painter = QPainter(self.viewport())
painter.setClipRect(event.rect())
painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
floor = event.rect().bottom()
ceiling = event.rect().top()
fv = self.firstVisibleBlock().blockNumber()
@ -370,8 +371,7 @@ class TextBrowser(PlainTextEdit): # {{{
if bot > top + 1 and not img.isNull():
y_top = self.blockBoundingGeometry(doc.findBlockByNumber(top+1)).translated(origin).y() + 3
y_bot -= 3
scaled, imgw, imgh = fit_image(img.width(), img.height(), w - 3, y_bot - y_top)
painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
scaled, imgw, imgh = fit_image(int(img.width()/img.devicePixelRatio()), int(img.height()/img.devicePixelRatio()), w - 3, y_bot - y_top)
painter.drawPixmap(QRect(3, y_top, imgw, imgh), img)
painter.end()
@ -559,7 +559,12 @@ class DiffSplit(QSplitter): # {{{
@property
def failed_img(self):
if self._failed_img is None:
try:
dpr = self.devicePixelRatioF()
except AttributeError:
dpr = self.devicePixelRatio()
i = QImage(200, 150, QImage.Format_ARGB32)
i.setDevicePixelRatio(dpr)
i.fill(Qt.white)
p = QPainter(i)
r = i.rect().adjusted(10, 10, -10, -10)
@ -580,6 +585,11 @@ class DiffSplit(QSplitter): # {{{
def load(data):
p = QPixmap()
p.loadFromData(bytes(data))
try:
dpr = self.devicePixelRatioF()
except AttributeError:
dpr = self.devicePixelRatio()
p.setDevicePixelRatio(dpr)
if data and p.isNull():
p = self.failed_img
return p
@ -647,7 +657,7 @@ class DiffSplit(QSplitter): # {{{
def get_lines_for_image(self, img, view):
if img.isNull():
return 0, 0
w, h = img.width(), img.height()
w, h = int(img.width()/img.devicePixelRatio()), int(img.height()/img.devicePixelRatio())
scaled, w, h = fit_image(w, h, view.available_width() - 3, int(0.9 * view.height()))
line_height = view.blockBoundingRect(view.document().begin()).height()
return int(ceil(h / line_height)) + 1, w