Initial support for intensity-tinted alpha watermark

common/rfb/Watermark.h

@@ -0,0 +1,43 @@
+/* Copyright (C) 2023 Kasm
+ *
+ * This 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 software 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 software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef WATERMARK_H
+#define WATERMARK_H
+
+#include <stdint.h>
+#include <rfb/Region.h>
+
+struct watermarkInfo_t {
+	uint8_t *src;
+	uint16_t w, h;
+
+	int16_t x, y;
+	uint16_t repeat;
+
+	uint8_t r, g, b, a;
+};
+
+extern watermarkInfo_t watermarkInfo;
+
+bool watermarkInit();
+void packWatermark(const rfb::Region &changed); // filter and pack the watermark for sending
+
+extern uint8_t *watermarkData;
+extern uint32_t watermarkDataLen;
+
+#endif