.appveyor.yml

@@ -1,4 +1,4 @@
-version: 12.2.{build}
+version: 12.1.{build}
 
 configuration:
   - Release

gpxsee.pro

@@ -3,7 +3,7 @@ unix:!macx:!android {
 } else {
     TARGET = GPXSee
 }
-VERSION = 12.2
+VERSION = 12.1
 
 QT += core \
     gui \

pkg/windows/gpxsee64.nsi

@@ -37,7 +37,7 @@ Unicode true
 ; The name of the installer
 Name "GPXSee"
 ; Program version
-!define VERSION "12.2"
+!define VERSION "12.1"
 
 ; The file to write
 OutFile "GPXSee-${VERSION}_x64.exe"

src/GUI/app.cpp

@@ -6,7 +6,6 @@
 #include <QNetworkAccessManager>
 #include <QLibraryInfo>
 #include <QSurfaceFormat>
-#include <QImageReader>
 #ifdef Q_OS_ANDROID
 #include <QCoreApplication>
 #include <QJniObject>
@@ -60,9 +59,6 @@ App::App(int &argc, char **argv) : QApplication(argc, argv)
 	fmt.setStencilBufferSize(8);
 	fmt.setSamples(4);
 	QSurfaceFormat::setDefaultFormat(fmt);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-	QImageReader::setAllocationLimit(0);
-#endif // QT6
 
 	loadDatums();
 	loadPCSs();

src/map/image.cpp

@@ -11,17 +11,26 @@ void Image::draw(QPainter *painter, const QRectF &rect, Map::Flags flags)
 
 	/* When OpenGL is used, big images are rendered incredibly slow or not at
 	   all using the QPainter::drawImage() function with a source rect set. So
-	   we have to tile the image ourself before it can be drawn. */
+	   we have to tile the image ourself before it can be drawn.
+
+	   We have to use a list of dynamically allocated pixmaps as QPainter
+	   rendering is broken in yet another way with OpenGL and drawPixmap() does
+	   access already deleted image instances when reusing a single pixmap. */
 	if (flags & Map::OpenGL) {
+		QList<QPixmap *> list;
+
 		for (int i = sr.left()/TILE_SIZE; i <= sr.right()/TILE_SIZE; i++) {
 			for (int j = sr.top()/TILE_SIZE; j <= sr.bottom()/TILE_SIZE; j++) {
 				QPoint tl(i * TILE_SIZE, j * TILE_SIZE);
 				QRect tile(tl, QSize(TILE_SIZE, TILE_SIZE));
-				QPixmap pm(QPixmap::fromImage(_img.copy(tile)));
+				QPixmap *pm = new QPixmap(QPixmap::fromImage(_img.copy(tile)));
-				pm.setDevicePixelRatio(ratio);
+				list.append(pm);
-				painter->drawPixmap(tl/ratio, pm);
+				pm->setDevicePixelRatio(ratio);
+				painter->drawPixmap(tl/ratio, *pm);
 			}
 		}
+
+		qDeleteAll(list);
 	} else
 		painter->drawImage(rect.topLeft(), _img, sr);
 }