Method WarpPerspectiveBackwardMat

src/opr/impl/imgproc.cpp:349–366

MGB_DYN_TYPE_OBJ_FINAL_IMPL(WarpPerspectiveBackwardMat);

WarpPerspectiveBackwardMat::WarpPerspectiveBackwardMat(
        VarNode* src, VarNode* mat, VarNode* mat_idx, VarNode* out_diff,
        const Param& param, const OperatorNodeConfig& config)
        : Super(
                  OperatorNodeBaseCtorParam{
                          src->owner_graph(),
                          config,
                          "warp_perspective_bwd_mat",
                          {src, mat, mat_idx}},
                  1, true) {
    init_megdnn_opr(*this, param);
    if (mat_idx) {
        add_input({src, mat, mat_idx, out_diff});
    } else {
        add_input({src, mat, out_diff});
    }
    intl::MegDNNOprInitPostCtor<WarpPerspectiveBackwardMat>::apply(*this);
}

void WarpPerspectiveBackwardMat::scn_do_execute() {
    if (input().size() == 3) {