Vendor raptor source files (was embedded gitlink)

Tree vendored at upstream 0019c5dd; origin + license recorded in
raptor/VENDOR.txt. Windows SDL dev packages excluded via .gitignore.

raptor/src/i_video.h

@@ -0,0 +1,55 @@
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2005-2014 Simon Howard
+//
+// 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.
+//
+// DESCRIPTION:
+//	System specific interface stuff.
+//
+#pragma once
+
+#include <stdint.h>
+
+// Screen width and height.
+
+#define SCREENWIDTH  320
+#define SCREENHEIGHT 200
+
+// Screen height used when aspect_ratio_correct=true.
+
+#define SCREENHEIGHT_4_3 240
+
+typedef uint8_t pixel_t;
+typedef bool (*grabmouse_callback_t)(void);
+
+// Screen width and height, from configuration file.
+
+extern int window_width;
+extern int window_height;
+extern int fullscreen;
+extern int txt_fullscreen;
+
+extern pixel_t *I_VideoBuffer;
+
+void I_InitGraphics(uint8_t *pal);
+void I_ShutdownGraphics(void);
+void I_FinishUpdate (void);
+void I_GetEvent(void);
+void I_SetPalette(uint8_t *doompalette, int start = 0);
+void I_GetPalette(uint8_t *pal);
+void I_GetMousePos(int *x, int *y);
+void I_SetMousePos(int x, int y);
+void I_SetGrabMouseCallback(grabmouse_callback_t func);
+void VIDEO_LoadPrefs(void);
+void closewindow(void);
+bool I_GetNeedResize(bool setonlypos);
+void I_Settextmode(bool flag);