Merge "libgui: Fix surface damage on rotated buffers"

        // the origin being in the bottom-left corner. Here we flip to the

        // convention that the rest of the system uses (top-left corner) by

        // subtracting all top/bottom coordinates from the buffer height.

        int height = buffer->height;

        if ((mTransform ^ mStickyTransform) & NATIVE_WINDOW_TRANSFORM_ROT_90) {

            height = buffer->width;

        }

        Region flippedRegion;

        for (auto rect : mDirtyRegion) {

            auto top = buffer->height - rect.bottom;

            auto bottom = buffer->height - rect.top;

            auto top = height - rect.bottom;

            auto bottom = height - rect.top;

            Rect flippedRect{rect.left, top, rect.right, bottom};

            flippedRegion.orSelf(flippedRect);

        }