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Broken OpenGL image part drawing workaround

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This commit is contained in:
Martin Tůma 2018-08-22 00:14:07 +02:00
parent 3b2d4dcd31
commit d4b46a4bb6
2 changed files with 14 additions and 5 deletions
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11
src/map/geotiffmap.cpp
View File

@ -79,7 +79,12 @@ void GeoTIFFMap::draw(QPainter *painter, const QRectF &rect, bool block)
{
Q_UNUSED(block)
if (_img && !_img->isNull())
painter->drawImage(rect.topLeft(), *_img, QRectF(rect.topLeft()
* _ratio, rect.size() * _ratio));
if (_img && !_img->isNull()) {
/* Drawing directly a sub-rectangle without an image copy does not work
for big images under OpenGL. The image is most probably loaded as
whole which exceeds the texture size limit. */
QRectF sr(rect.topLeft() * _ratio, rect.size() * _ratio);
QImage img(_img->copy(sr.toRect()));
painter->drawImage(rect.topLeft(), img);
}
}

8
src/map/ozimap.cpp
View File

@ -302,8 +302,12 @@ void OziMap::drawOZF(QPainter *painter, const QRectF &rect) const
void OziMap::drawImage(QPainter *painter, const QRectF &rect) const
{
painter->drawImage(rect.topLeft(), *_img, QRectF(rect.topLeft() * _ratio,
rect.size() * _ratio));
/* Drawing directly a sub-rectangle without an image copy does not work
for big images under OpenGL. The image is most probably loaded as
whole which exceeds the texture size limit. */
QRectF sr(rect.topLeft() * _ratio, rect.size() * _ratio);
QImage img(_img->copy(sr.toRect()));
painter->drawImage(rect.topLeft(), img);
}
void OziMap::draw(QPainter *painter, const QRectF &rect, bool block)