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2023-11-21ui/pixman-minimal.h: fix empty allocationManos Pitsidianakis
In the minimal pixman API stub that is used when the real pixman dependency is missing a NULL dereference happens when virtio-gpu-rutabaga allocates a pixman image with bits = NULL and rowstride_bytes = zero. A buffer of rowstride_bytes * height is allocated which is NULL. However, in that scenario pixman calculates a new stride value based on given width, height and format size. This commit adds a helper function that performs the same logic as pixman. Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20231121093840.2121195-1-manos.pitsidianakis@linaro.org>
2023-11-07ui: add pixman-minimal.hMarc-André Lureau
This is a tiny subset of PIXMAN API that is used pervasively in QEMU codebase to manage images and identify the underlying format. It doesn't seems worth to wrap this in a QEMU-specific API. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Thomas Huth <thuth@redhat.com>