Add a new separate module for grid transfers/interpolation.

1 files changed, 58 insertions, 0 deletions

diff --git a/transfer.h b/transfer.h
new file mode 100644
index 0000000..f9d0870
--- /dev/null
+++ b/transfer.h
@@ -0,0 +1,58 @@
+/*
+ * Grid transfer operators
+ * Copyright 2018 Anton Khirnov <anton@khirnov.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MG2D_TRANSFER_H
+#define MG2D_TRANSFER_H
+
+#include <stddef.h>
+#include <threadpool.h>
+
+#include "ndarray.h"
+
+enum GridTransferOperator {
+    GRID_TRANSFER_LAGRANGE_1,
+    GRID_TRANSFER_LAGRANGE_3,
+    GRID_TRANSFER_FW_1,
+};
+
+typedef struct RegularGrid2D {
+    size_t size[2];
+    double step[2];
+} RegularGrid2D;
+
+typedef struct GridTransferContext {
+    void *priv;
+
+    TPContext *tp;
+    int cpuflags;
+
+    enum GridTransferOperator op;
+
+    RegularGrid2D src;
+    RegularGrid2D dst;
+} GridTransferContext;
+
+GridTransferContext *mg2di_gt_alloc(enum GridTransferOperator op);
+int mg2di_gt_init(GridTransferContext *ctx);
+
+void mg2di_gt_free(GridTransferContext **ctx);
+
+int mg2di_gt_transfer(GridTransferContext *ctx,
+                      NDArray *dst, const NDArray *src);
+
+#endif // MG2D_TRANSFER_H