--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/freeglut/src/fg_gl2.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,82 @@
+/*
+ * fg_gl2.c
+ *
+ * Load OpenGL (ES) 2.0 functions used by fg_geometry
+ *
+ * Copyright (C) 2012  Sylvain Beucler
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef  FG_GL2_H
+#define  FG_GL2_H
+
+#include <GL/freeglut.h>
+#include "fg_internal.h"
+
+#ifdef GL_ES_VERSION_2_0
+/* Use existing functions on GLES 2.0 */
+
+#define FGH_ARRAY_BUFFER GL_ARRAY_BUFFER
+#define FGH_STATIC_DRAW GL_STATIC_DRAW
+#define FGH_ELEMENT_ARRAY_BUFFER GL_ELEMENT_ARRAY_BUFFER
+
+#define fghGenBuffers glGenBuffers
+#define fghDeleteBuffers glDeleteBuffers
+#define fghBindBuffer glBindBuffer
+#define fghBufferData glBufferData
+#define fghEnableVertexAttribArray glEnableVertexAttribArray
+#define fghDisableVertexAttribArray glDisableVertexAttribArray
+#define fghVertexAttribPointer glVertexAttribPointer
+
+#else
+/* Load functions dynamically, they are not defined in e.g. win32's
+   OpenGL headers */
+
+#    ifndef APIENTRY
+#        define APIENTRY
+#    endif
+
+/* extension #defines, types and entries, avoiding a dependency on additional
+   libraries like GLEW or the GL/glext.h header */
+#define FGH_ARRAY_BUFFER 0x8892
+#define FGH_STATIC_DRAW 0x88E4
+#define FGH_ELEMENT_ARRAY_BUFFER 0x8893
+
+typedef int fghGLsizeiptr;
+typedef void (APIENTRY *FGH_PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
+typedef void (APIENTRY *FGH_PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
+typedef void (APIENTRY *FGH_PFNGLBUFFERDATAPROC) (GLenum target, fghGLsizeiptr size, const GLvoid *data, GLenum usage);
+typedef void (APIENTRY *FGH_PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint* buffers);
+typedef void (APIENTRY *FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
+typedef void (APIENTRY *FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint);
+typedef void (APIENTRY *FGH_PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
+
+extern FGH_PFNGLGENBUFFERSPROC fghGenBuffers;
+extern FGH_PFNGLDELETEBUFFERSPROC fghDeleteBuffers;
+extern FGH_PFNGLBINDBUFFERPROC fghBindBuffer;
+extern FGH_PFNGLBUFFERDATAPROC fghBufferData;
+extern FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray;
+extern FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray;
+extern FGH_PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer;
+
+#    endif
+
+extern void fgInitGL2();
+
+#endif