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diff --git a/engines/sword25/util/glsprites/internal/core.h b/engines/sword25/util/glsprites/internal/core.h
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+/******************************************************************************/
+/* This file is part of Broken Sword 2.5 */
+/* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdörfer */
+/* */
+/* Broken Sword 2.5 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. */
+/* */
+/* Broken Sword 2.5 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 Broken Sword 2.5; if not, write to the Free Software */
+/* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+/******************************************************************************/
+
+#ifndef GLS_CORE_H
+#define GLS_CORE_H
+
+#include "../glsprites.h"
+
+/* GL_ARB_texture_rectangle / GL_EXT_texture_rectangle / GL_NV_texture_rectangle */
+#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE_ARB 0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE_ARB 0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
+
+typedef struct
+{
+ GLS_UInt32 maxTextureSize;
+ GLS_Bool textureRectanglesSupported;
+ GLS_UInt32 maxTextureRectangleSize;
+} GLS_OGLCaps;
+
+extern GLS_OGLCaps GLS_TheOGLCaps;
+
+#endif