[host] nvfbc: make the downsampleParser available outside of NvFBC

host/include/downsample_parser.h

@@ -0,0 +1,48 @@
+/**
+ * looking glass
+ * copyright © 2017-2023 the looking glass authors
+ * https://looking-glass.io
+ *
+ * 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 2 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, write to the free software foundation, inc., 59
+ * temple place, suite 330, boston, ma 02111-1307 usa
+ */
+
+#include <stdbool.h>
+#include "common/option.h"
+#include "common/vector.h"
+
+typedef struct
+{
+  unsigned int id;
+  bool         greater;
+  unsigned int x;
+  unsigned int y;
+  unsigned int targetX;
+  unsigned int targetY;
+}
+DownsampleRule;
+
+extern Vector downsampleRules;
+
+bool downsampleParser(struct Option * opt, const char * str);
+
+#define DOWNSAMPLE_PARSER(moduleName) \
+{ \
+  .module         = moduleName, \
+  .name           = "downsample", \
+  .description    = "Downsample rules, format: [>](width)x(height):(toWidth)x(toHeight)", \
+  .type           = OPTION_TYPE_STRING, \
+  .value.x_string = NULL, \
+  .parser         = downsampleParser \
+}