Make bytes-per-line safe for int overflow

Goes through the Qt code and make sure bytes-per-line calculations are
safe when they are too big for 32bit integers.

Change-Id: I88b2d74b3da82e91407d316aa932a4a37587c0cf
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.cpp b/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.cpp
index ca50910114..511d85a400 100644
--- a/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.cpp
+++ b/src/platformsupport/platformcompositor/qplatformbackingstoreopenglsupport.cpp
@@ -385,7 +385,7 @@ GLuint QPlatformBackingStoreOpenGLSupport::toTexture(const QRegion &dirtyRegion,
     // The image provided by the backingstore may have a stride larger than width * 4, for
     // instance on platforms that manually implement client-side decorations.
     static const int bytesPerPixel = 4;
-    const int strideInPixels = image.bytesPerLine() / bytesPerPixel;
+    const qsizetype strideInPixels = image.bytesPerLine() / bytesPerPixel;
     const bool hasUnpackRowLength = !ctx->isOpenGLES() || ctx->format().majorVersion() >= 3;
 
     QOpenGLFunctions *funcs = ctx->functions();