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Use Qt::transparent to resolve graphical artifacts with images with transparent background. 

We need to use QImage::Format_ARGB32_Premultiplied on Windows to preserve a text hinting and antialiasing. Using the function `qRgba()` leads to wrong pixel values on a target image. Since, `QImage::fill(uint pixel)` doesn't handle the QImage::Format_ARGB32_Premultiplied format, so we need to use the another overload `QImage::fill(const QColor &color)`

Issues:
https://github.com/ariya/phantomjs/issues/11276
https://github.com/ariya/phantomjs/issues/11007
https://github.com/ariya/phantomjs/issues/11366
1.x
Vitaliy Slobodin 2013-06-23 13:17:12 +04:00
parent b1cb3a00bd
commit 1a25383307
1 changed files with 2 additions and 2 deletions
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4
src/webpage.cpp
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@ -990,7 +990,7 @@ QImage WebPage::renderImage()
#endif
QImage buffer(frameRect.size(), format);
buffer.fill(qRgba(255, 255, 255, 0));
buffer.fill(Qt::transparent);
QPainter painter;
@ -1004,7 +1004,7 @@ QImage WebPage::renderImage()
for (int y = 0; y < vtiles; ++y) {
QImage tileBuffer(tileSize, tileSize, format);
tileBuffer.fill(qRgba(255, 255, 255, 0));
tileBuffer.fill(Qt::transparent);
// Render the web page onto the small tile first
painter.begin(&tileBuffer);