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* Standard freebsd-unix-linux split

marco 25 éve
szülő
commit
d3462d12a4

+ 2065 - 0
packages/opengl/unix/gl.pp

@@ -0,0 +1,2065 @@
+{
+  $Id$
+
+  Translation of the Mesa GL headers for FreePascal
+  Copyright (C) 1999 Sebastian Guenther
+
+
+  Mesa 3-D graphics library
+  Version:  3.0
+  Copyright (C) 1995-1998  Brian Paul
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  This library 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
+  Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public
+  License along with this library; if not, write to the Free
+  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+}
+
+{$MODE delphi}  // objfpc would not work because of direct proc var assignments
+
+{You have to enable Macros (compiler switch "-Sm") for compiling this unit!
+ This is necessary for supporting different platforms with different calling
+ conventions via a single unit.}
+
+unit GL;
+
+interface
+
+{$DEFINE GL1_0}
+{$DEFINE GL1_1}
+{$DEFINE GL1_2}
+{$DEFINE MESA}                 {enable if you want to use some special mesa extensions}
+{$DEFINE EXTENSIONS}           {enable if you need one/all of extensions}
+{$DEFINE SGI_EXTENSIONS}       {enable if you need one/all of extensions}
+
+{$MACRO ON}
+
+{$IFDEF Linux}
+  {$LINKLIB c}
+{$ELSE}
+  {$MESSAGE Unsupported platform.}
+{$ENDIF}
+
+
+// =======================================================
+//   Unit specific extensions
+// =======================================================
+
+function InitGLFromLibrary(libname: PChar): Boolean;
+
+// determines automatically which libraries to use:
+function InitGL: Boolean;
+
+
+var
+  GLDumpUnresolvedFunctions,
+  GLInitialized: Boolean;
+
+
+// =======================================================
+//   GL consts, types and functions
+// =======================================================
+
+
+// -------------------------------------------------------
+//   GL types
+// -------------------------------------------------------
+
+type
+  PSingle   = ^Single;
+  PDouble   = ^Double;
+
+  GLvoid    = Pointer;
+  GLboolean = Byte;
+
+  GLbyte    = ShortInt; // 1-byte signed
+  GLshort   = Integer;  // 2-byte signed
+  GLint     = LongInt;  // 4-byte signed
+
+  GLubyte   = Byte;     // 1-byte unsigned
+  GLushort  = Word;     // 2-byte unsigned
+  GLuint    = DWord;    // 4-byte signed
+
+  GLsizei   = LongInt;  // 4-byte signed
+
+  GLfloat   = Single;   // single precision float
+  GLclampf  = Single;   // single precision float in [0,1]
+  GLdouble  = Double;   // double precision float
+  GLclampd  = Double;   // double precision float in [0,1]
+
+  GLenum    = DWord;
+
+  PGLBoolean = ^GLBoolean;
+  PGLFloat   = ^GLfloat;
+  PGLDouble  = ^GLDouble;
+
+type
+  GLbitfield = DWord;  { was an enum - no corresponding thing in pascal }
+const
+  GL_CURRENT_BIT        = $00000001;
+  GL_POINT_BIT          = $00000002;
+  GL_LINE_BIT           = $00000004;
+  GL_POLYGON_BIT        = $00000008;
+  GL_POLYGON_STIPPLE_BIT= $00000010;
+  GL_PIXEL_MODE_BIT     = $00000020;
+  GL_LIGHTING_BIT       = $00000040;
+  GL_FOG_BIT            = $00000080;
+  GL_DEPTH_BUFFER_BIT   = $00000100;
+  GL_ACCUM_BUFFER_BIT   = $00000200;
+  GL_STENCIL_BUFFER_BIT = $00000400;
+  GL_VIEWPORT_BIT       = $00000800;
+  GL_TRANSFORM_BIT      = $00001000;
+  GL_ENABLE_BIT         = $00002000;
+  GL_COLOR_BUFFER_BIT   = $00004000;
+  GL_HINT_BIT           = $00008000;
+  GL_EVAL_BIT           = $00010000;
+  GL_LIST_BIT           = $00020000;
+  GL_TEXTURE_BIT        = $00040000;
+  GL_SCISSOR_BIT        = $00080000;
+  GL_ALL_ATTRIB_BITS    = $000fffff;
+
+
+// -------------------------------------------------------
+//   GL constants
+// -------------------------------------------------------
+
+{$IFDEF GL1_0}
+
+const
+  GL_NO_ERROR                           = 0;
+
+  // Boolean values
+  GL_FALSE                              = 0;
+  GL_TRUE                               = 1;
+
+  // Data types
+  GL_BYTE                               = $1400;
+  GL_UNSIGNED_BYTE                      = $1401;
+  GL_SHORT                              = $1402;
+  GL_UNSIGNED_SHORT                     = $1403;
+  GL_INT                                = $1404;
+  GL_UNSIGNED_INT                       = $1405;
+  GL_FLOAT                              = $1406;
+  GL_DOUBLE                             = $140A;
+  GL_2_BYTES                            = $1407;
+  GL_3_BYTES                            = $1408;
+  GL_4_BYTES                            = $1409;
+
+  // Primitives
+  GL_LINES                              = $0001;
+  GL_POINTS                             = $0000;
+  GL_LINE_STRIP                         = $0003;
+  GL_LINE_LOOP                          = $0002;
+  GL_TRIANGLES                          = $0004;
+  GL_TRIANGLE_STRIP                     = $0005;
+  GL_TRIANGLE_FAN                       = $0006;
+  GL_QUADS                              = $0007;
+  GL_QUAD_STRIP                         = $0008;
+  GL_POLYGON                            = $0009;
+  GL_EDGE_FLAG                          = $0B43;
+
+  // Vertex arrays
+  GL_VERTEX_ARRAY                       = $8074;
+  GL_NORMAL_ARRAY                       = $8075;
+  GL_COLOR_ARRAY                        = $8076;
+  GL_INDEX_ARRAY                        = $8077;
+  GL_TEXTURE_COORD_ARRAY                = $8078;
+  GL_EDGE_FLAG_ARRAY                    = $8079;
+  GL_VERTEX_ARRAY_SIZE                  = $807A;
+  GL_VERTEX_ARRAY_TYPE                  = $807B;
+  GL_VERTEX_ARRAY_STRIDE                = $807C;
+  GL_NORMAL_ARRAY_TYPE                  = $807E;
+  GL_NORMAL_ARRAY_STRIDE                = $807F;
+  GL_COLOR_ARRAY_SIZE                   = $8081;
+  GL_COLOR_ARRAY_TYPE                   = $8082;
+  GL_COLOR_ARRAY_STRIDE                 = $8083;
+  GL_INDEX_ARRAY_TYPE                   = $8085;
+  GL_INDEX_ARRAY_STRIDE                 = $8086;
+  GL_TEXTURE_COORD_ARRAY_SIZE           = $8088;
+  GL_TEXTURE_COORD_ARRAY_TYPE           = $8089;
+  GL_TEXTURE_COORD_ARRAY_STRIDE         = $808A;
+  GL_EDGE_FLAG_ARRAY_STRIDE             = $808C;
+  GL_VERTEX_ARRAY_POINTER               = $808E;
+  GL_NORMAL_ARRAY_POINTER               = $808F;
+  GL_COLOR_ARRAY_POINTER                = $8090;
+  GL_INDEX_ARRAY_POINTER                = $8091;
+  GL_TEXTURE_COORD_ARRAY_POINTER        = $8092;
+  GL_EDGE_FLAG_ARRAY_POINTER            = $8093;
+  GL_V2F                                = $2A20;
+  GL_V3F                                = $2A21;
+  GL_C4UB_V2F                           = $2A22;
+  GL_C4UB_V3F                           = $2A23;
+  GL_C3F_V3F                            = $2A24;
+  GL_N3F_V3F                            = $2A25;
+  GL_C4F_N3F_V3F                        = $2A26;
+  GL_T2F_V3F                            = $2A27;
+  GL_T4F_V4F                            = $2A28;
+  GL_T2F_C4UB_V3F                       = $2A29;
+  GL_T2F_C3F_V3F                        = $2A2A;
+  GL_T2F_N3F_V3F                        = $2A2B;
+  GL_T2F_C4F_N3F_V3F                    = $2A2C;
+  GL_T4F_C4F_N3F_V4F                    = $2A2D;
+
+  // Matrix Mode
+  GL_MATRIX_MODE                        = $0BA0;
+  GL_MODELVIEW                          = $1700;
+  GL_PROJECTION                         = $1701;
+  GL_TEXTURE                            = $1702;
+
+  // Points
+  GL_POINT_SMOOTH                       = $0B10;
+  GL_POINT_SIZE                         = $0B11;
+  GL_POINT_SIZE_GRANULARITY             = $0B13;
+  GL_POINT_SIZE_RANGE                   = $0B12;
+
+  // Lines
+  GL_LINE_SMOOTH                        = $0B20;
+  GL_LINE_STIPPLE                       = $0B24;
+  GL_LINE_STIPPLE_PATTERN               = $0B25;
+  GL_LINE_STIPPLE_REPEAT                = $0B26;
+  GL_LINE_WIDTH                         = $0B21;
+  GL_LINE_WIDTH_GRANULARITY             = $0B23;
+  GL_LINE_WIDTH_RANGE                   = $0B22;
+
+  // Polygons
+  GL_POINT                              = $1B00;
+  GL_LINE                               = $1B01;
+  GL_FILL                               = $1B02;
+  GL_CCW                                = $0901;
+  GL_CW                                 = $0900;
+  GL_FRONT                              = $0404;
+  GL_BACK                               = $0405;
+  GL_CULL_FACE                          = $0B44;
+  GL_CULL_FACE_MODE                     = $0B45;
+  GL_POLYGON_SMOOTH                     = $0B41;
+  GL_POLYGON_STIPPLE                    = $0B42;
+  GL_FRONT_FACE                         = $0B46;
+  GL_POLYGON_MODE                       = $0B40;
+  GL_POLYGON_OFFSET_FACTOR              = $8038;
+  GL_POLYGON_OFFSET_UNITS               = $2A00;
+  GL_POLYGON_OFFSET_POINT               = $2A01;
+  GL_POLYGON_OFFSET_LINE                = $2A02;
+  GL_POLYGON_OFFSET_FILL                = $8037;
+
+  // Display lists
+  GL_COMPILE                            = $1300;
+  GL_COMPILE_AND_EXECUTE                = $1301;
+  GL_LIST_BASE                          = $0B32;
+  GL_LIST_INDEX                         = $0B33;
+  GL_LIST_MODE                          = $0B30;
+
+  // Depth buffer
+  GL_NEVER                              = $0200;
+  GL_LESS                               = $0201;
+  GL_GEQUAL                             = $0206;
+  GL_LEQUAL                             = $0203;
+  GL_GREATER                            = $0204;
+  GL_NOTEQUAL                           = $0205;
+  GL_EQUAL                              = $0202;
+  GL_ALWAYS                             = $0207;
+  GL_DEPTH_TEST                         = $0B71;
+  GL_DEPTH_BITS                         = $0D56;
+  GL_DEPTH_CLEAR_VALUE                  = $0B73;
+  GL_DEPTH_FUNC                         = $0B74;
+  GL_DEPTH_RANGE                        = $0B70;
+  GL_DEPTH_WRITEMASK                    = $0B72;
+  GL_DEPTH_COMPONENT                    = $1902;
+
+  // Lighting
+  GL_LIGHTING                           = $0B50;
+  GL_LIGHT0                             = $4000;
+  GL_LIGHT1                             = $4001;
+  GL_LIGHT2                             = $4002;
+  GL_LIGHT3                             = $4003;
+  GL_LIGHT4                             = $4004;
+  GL_LIGHT5                             = $4005;
+  GL_LIGHT6                             = $4006;
+  GL_LIGHT7                             = $4007;
+  GL_SPOT_EXPONENT                      = $1205;
+  GL_SPOT_CUTOFF                        = $1206;
+  GL_CONSTANT_ATTENUATION               = $1207;
+  GL_LINEAR_ATTENUATION                 = $1208;
+  GL_QUADRATIC_ATTENUATION              = $1209;
+  GL_AMBIENT                            = $1200;
+  GL_DIFFUSE                            = $1201;
+  GL_SPECULAR                           = $1202;
+  GL_SHININESS                          = $1601;
+  GL_EMISSION                           = $1600;
+  GL_POSITION                           = $1203;
+  GL_SPOT_DIRECTION                     = $1204;
+  GL_AMBIENT_AND_DIFFUSE                = $1602;
+  GL_COLOR_INDEXES                      = $1603;
+  GL_LIGHT_MODEL_TWO_SIDE               = $0B52;
+  GL_LIGHT_MODEL_LOCAL_VIEWER           = $0B51;
+  GL_LIGHT_MODEL_AMBIENT                = $0B53;
+  GL_FRONT_AND_BACK                     = $0408;
+  GL_SHADE_MODEL                        = $0B54;
+  GL_FLAT                               = $1D00;
+  GL_SMOOTH                             = $1D01;
+  GL_COLOR_MATERIAL                     = $0B57;
+  GL_COLOR_MATERIAL_FACE                = $0B55;
+  GL_COLOR_MATERIAL_PARAMETER           = $0B56;
+  GL_NORMALIZE                          = $0BA1;
+
+  // User clipping planes
+  GL_CLIP_PLANE0                        = $3000;
+  GL_CLIP_PLANE1                        = $3001;
+  GL_CLIP_PLANE2                        = $3002;
+  GL_CLIP_PLANE3                        = $3003;
+  GL_CLIP_PLANE4                        = $3004;
+  GL_CLIP_PLANE5                        = $3005;
+
+  // Accumulation buffer
+  GL_ACCUM_RED_BITS                     = $0D58;
+  GL_ACCUM_GREEN_BITS                   = $0D59;
+  GL_ACCUM_BLUE_BITS                    = $0D5A;
+  GL_ACCUM_ALPHA_BITS                   = $0D5B;
+  GL_ACCUM_CLEAR_VALUE                  = $0B80;
+  GL_ACCUM                              = $0100;
+  GL_ADD                                = $0104;
+  GL_LOAD                               = $0101;
+  GL_MULT                               = $0103;
+  GL_RETURN                             = $0102;
+
+  // Alpha testing
+  GL_ALPHA_TEST                         = $0BC0;
+  GL_ALPHA_TEST_REF                     = $0BC2;
+  GL_ALPHA_TEST_FUNC                    = $0BC1;
+
+  // Blending
+  GL_BLEND                              = $0BE2;
+  GL_BLEND_SRC                          = $0BE1;
+  GL_BLEND_DST                          = $0BE0;
+  GL_ZERO                               = 0;
+  GL_ONE                                = 1;
+  GL_SRC_COLOR                          = $0300;
+  GL_ONE_MINUS_SRC_COLOR                = $0301;
+  GL_DST_COLOR                          = $0306;
+  GL_ONE_MINUS_DST_COLOR                = $0307;
+  GL_SRC_ALPHA                          = $0302;
+  GL_ONE_MINUS_SRC_ALPHA                = $0303;
+  GL_DST_ALPHA                          = $0304;
+  GL_ONE_MINUS_DST_ALPHA                = $0305;
+  GL_SRC_ALPHA_SATURATE                 = $0308;
+  GL_CONSTANT_COLOR                     = $8001;
+  GL_ONE_MINUS_CONSTANT_COLOR           = $8002;
+  GL_CONSTANT_ALPHA                     = $8003;
+  GL_ONE_MINUS_CONSTANT_ALPHA           = $8004;
+
+  // Render mode
+  GL_FEEDBACK                           = $1C01;
+  GL_RENDER                             = $1C00;
+  GL_SELECT                             = $1C02;
+
+  // Feedback
+  GL_2D                                 = $0600;
+  GL_3D                                 = $0601;
+  GL_3D_COLOR                           = $0602;
+  GL_3D_COLOR_TEXTURE                   = $0603;
+  GL_4D_COLOR_TEXTURE                   = $0604;
+  GL_POINT_TOKEN                        = $0701;
+  GL_LINE_TOKEN                         = $0702;
+  GL_LINE_RESET_TOKEN                   = $0707;
+  GL_POLYGON_TOKEN                      = $0703;
+  GL_BITMAP_TOKEN                       = $0704;
+  GL_DRAW_PIXEL_TOKEN                   = $0705;
+  GL_COPY_PIXEL_TOKEN                   = $0706;
+  GL_PASS_THROUGH_TOKEN                 = $0700;
+  GL_FEEDBACK_BUFFER_POINTER            = $0DF0;
+  GL_FEEDBACK_BUFFER_SIZE               = $0DF1;
+  GL_FEEDBACK_BUFFER_TYPE               = $0DF2;
+
+  // Selection
+  GL_SELECTION_BUFFER_POINTER           = $0DF3;
+  GL_SELECTION_BUFFER_SIZE              = $0DF4;
+
+  // Fog
+  GL_FOG                                = $0B60;
+  GL_FOG_MODE                           = $0B65;
+  GL_FOG_DENSITY                        = $0B62;
+  GL_FOG_COLOR                          = $0B66;
+  GL_FOG_INDEX                          = $0B61;
+  GL_FOG_START                          = $0B63;
+  GL_FOG_END                            = $0B64;
+  GL_LINEAR                             = $2601;
+  GL_EXP                                = $0800;
+  GL_EXP2                               = $0801;
+
+  // Logic ops
+  GL_LOGIC_OP                           = $0BF1;
+  GL_INDEX_LOGIC_OP                     = $0BF1;
+  GL_COLOR_LOGIC_OP                     = $0BF2;
+  GL_LOGIC_OP_MODE                      = $0BF0;
+  GL_CLEAR                              = $1500;
+  GL_SET                                = $150F;
+  GL_COPY                               = $1503;
+  GL_COPY_INVERTED                      = $150C;
+  GL_NOOP                               = $1505;
+  GL_INVERT                             = $150A;
+  GL_AND                                = $1501;
+  GL_NAND                               = $150E;
+  GL_OR                                 = $1507;
+  GL_NOR                                = $1508;
+  GL_XOR                                = $1506;
+  GL_EQUIV                              = $1509;
+  GL_AND_REVERSE                        = $1502;
+  GL_AND_INVERTED                       = $1504;
+  GL_OR_REVERSE                         = $150B;
+  GL_OR_INVERTED                        = $150D;
+
+  // Stencil
+  GL_STENCIL_TEST                       = $0B90;
+  GL_STENCIL_WRITEMASK                  = $0B98;
+  GL_STENCIL_BITS                       = $0D57;
+  GL_STENCIL_FUNC                       = $0B92;
+  GL_STENCIL_VALUE_MASK                 = $0B93;
+  GL_STENCIL_REF                        = $0B97;
+  GL_STENCIL_FAIL                       = $0B94;
+  GL_STENCIL_PASS_DEPTH_PASS            = $0B96;
+  GL_STENCIL_PASS_DEPTH_FAIL            = $0B95;
+  GL_STENCIL_CLEAR_VALUE                = $0B91;
+  GL_STENCIL_INDEX                      = $1901;
+  GL_KEEP                               = $1E00;
+  GL_REPLACE                            = $1E01;
+  GL_INCR                               = $1E02;
+  GL_DECR                               = $1E03;
+
+  // Buffers, Pixel Drawing/Reading
+  GL_NONE                               = 0;
+  GL_LEFT                               = $0406;
+  GL_RIGHT                              = $0407;
+  //GL_FRONT                            = $0404;
+  //GL_BACK                             = $0405;
+  //GL_FRONT_AND_BACK                   = $0408;
+  GL_FRONT_LEFT                         = $0400;
+  GL_FRONT_RIGHT                        = $0401;
+  GL_BACK_LEFT                          = $0402;
+  GL_BACK_RIGHT                         = $0403;
+  GL_AUX0                               = $0409;
+  GL_AUX1                               = $040A;
+  GL_AUX2                               = $040B;
+  GL_AUX3                               = $040C;
+  GL_COLOR_INDEX                        = $1900;
+  GL_RED                                = $1903;
+  GL_GREEN                              = $1904;
+  GL_BLUE                               = $1905;
+  GL_ALPHA                              = $1906;
+  GL_LUMINANCE                          = $1909;
+  GL_LUMINANCE_ALPHA                    = $190A;
+  GL_ALPHA_BITS                         = $0D55;
+  GL_RED_BITS                           = $0D52;
+  GL_GREEN_BITS                         = $0D53;
+  GL_BLUE_BITS                          = $0D54;
+  GL_INDEX_BITS                         = $0D51;
+  GL_SUBPIXEL_BITS                      = $0D50;
+  GL_AUX_BUFFERS                        = $0C00;
+  GL_READ_BUFFER                        = $0C02;
+  GL_DRAW_BUFFER                        = $0C01;
+  GL_DOUBLEBUFFER                       = $0C32;
+  GL_STEREO                             = $0C33;
+  GL_BITMAP                             = $1A00;
+  GL_COLOR                              = $1800;
+  GL_DEPTH                              = $1801;
+  GL_STENCIL                            = $1802;
+  GL_DITHER                             = $0BD0;
+  GL_RGB                                = $1907;
+  GL_RGBA                               = $1908;
+
+  // Implementation limits
+  GL_MAX_LIST_NESTING                   = $0B31;
+  GL_MAX_ATTRIB_STACK_DEPTH             = $0D35;
+  GL_MAX_MODELVIEW_STACK_DEPTH          = $0D36;
+  GL_MAX_NAME_STACK_DEPTH               = $0D37;
+  GL_MAX_PROJECTION_STACK_DEPTH         = $0D38;
+  GL_MAX_TEXTURE_STACK_DEPTH            = $0D39;
+  GL_MAX_EVAL_ORDER                     = $0D30;
+  GL_MAX_LIGHTS                         = $0D31;
+  GL_MAX_CLIP_PLANES                    = $0D32;
+  GL_MAX_TEXTURE_SIZE                   = $0D33;
+  GL_MAX_PIXEL_MAP_TABLE                = $0D34;
+  GL_MAX_VIEWPORT_DIMS                  = $0D3A;
+  GL_MAX_CLIENT_ATTRIB_STACK_DEPTH      = $0D3B;
+
+  // Gets
+  GL_ATTRIB_STACK_DEPTH                 = $0BB0;
+  GL_CLIENT_ATTRIB_STACK_DEPTH          = $0BB1;
+  GL_COLOR_CLEAR_VALUE                  = $0C22;
+  GL_COLOR_WRITEMASK                    = $0C23;
+  GL_CURRENT_INDEX                      = $0B01;
+  GL_CURRENT_COLOR                      = $0B00;
+  GL_CURRENT_NORMAL                     = $0B02;
+  GL_CURRENT_RASTER_COLOR               = $0B04;
+  GL_CURRENT_RASTER_DISTANCE            = $0B09;
+  GL_CURRENT_RASTER_INDEX               = $0B05;
+  GL_CURRENT_RASTER_POSITION            = $0B07;
+  GL_CURRENT_RASTER_TEXTURE_COORDS      = $0B06;
+  GL_CURRENT_RASTER_POSITION_VALID      = $0B08;
+  GL_CURRENT_TEXTURE_COORDS             = $0B03;
+  GL_INDEX_CLEAR_VALUE                  = $0C20;
+  GL_INDEX_MODE                         = $0C30;
+  GL_INDEX_WRITEMASK                    = $0C21;
+  GL_MODELVIEW_MATRIX                   = $0BA6;
+  GL_MODELVIEW_STACK_DEPTH              = $0BA3;
+  GL_NAME_STACK_DEPTH                   = $0D70;
+  GL_PROJECTION_MATRIX                  = $0BA7;
+  GL_PROJECTION_STACK_DEPTH             = $0BA4;
+  GL_RENDER_MODE                        = $0C40;
+  GL_RGBA_MODE                          = $0C31;
+  GL_TEXTURE_MATRIX                     = $0BA8;
+  GL_TEXTURE_STACK_DEPTH                = $0BA5;
+  GL_VIEWPORT                           = $0BA2;
+
+  // Evaluators
+  GL_AUTO_NORMAL                        = $0D80;
+  GL_MAP1_COLOR_4                       = $0D90;
+  GL_MAP1_GRID_DOMAIN                   = $0DD0;
+  GL_MAP1_GRID_SEGMENTS                 = $0DD1;
+  GL_MAP1_INDEX                         = $0D91;
+  GL_MAP1_NORMAL                        = $0D92;
+  GL_MAP1_TEXTURE_COORD_1               = $0D93;
+  GL_MAP1_TEXTURE_COORD_2               = $0D94;
+  GL_MAP1_TEXTURE_COORD_3               = $0D95;
+  GL_MAP1_TEXTURE_COORD_4               = $0D96;
+  GL_MAP1_VERTEX_3                      = $0D97;
+  GL_MAP1_VERTEX_4                      = $0D98;
+  GL_MAP2_COLOR_4                       = $0DB0;
+  GL_MAP2_GRID_DOMAIN                   = $0DD2;
+  GL_MAP2_GRID_SEGMENTS                 = $0DD3;
+  GL_MAP2_INDEX                         = $0DB1;
+  GL_MAP2_NORMAL                        = $0DB2;
+  GL_MAP2_TEXTURE_COORD_1               = $0DB3;
+  GL_MAP2_TEXTURE_COORD_2               = $0DB4;
+  GL_MAP2_TEXTURE_COORD_3               = $0DB5;
+  GL_MAP2_TEXTURE_COORD_4               = $0DB6;
+  GL_MAP2_VERTEX_3                      = $0DB7;
+  GL_MAP2_VERTEX_4                      = $0DB8;
+  GL_COEFF                              = $0A00;
+  GL_DOMAIN                             = $0A02;
+  GL_ORDER                              = $0A01;
+
+  // Hints
+  GL_FOG_HINT                           = $0C54;
+  GL_LINE_SMOOTH_HINT                   = $0C52;
+  GL_PERSPECTIVE_CORRECTION_HINT        = $0C50;
+  GL_POINT_SMOOTH_HINT                  = $0C51;
+  GL_POLYGON_SMOOTH_HINT                = $0C53;
+  GL_DONT_CARE                          = $1100;
+  GL_FASTEST                            = $1101;
+  GL_NICEST                             = $1102;
+
+  // Scissor box
+  GL_SCISSOR_TEST                       = $0C11;
+  GL_SCISSOR_BOX                        = $0C10;
+
+  // Pixel Mode / Transfer
+  GL_MAP_COLOR                          = $0D10;
+  GL_MAP_STENCIL                        = $0D11;
+  GL_INDEX_SHIFT                        = $0D12;
+  GL_INDEX_OFFSET                       = $0D13;
+  GL_RED_SCALE                          = $0D14;
+  GL_RED_BIAS                           = $0D15;
+  GL_GREEN_SCALE                        = $0D18;
+  GL_GREEN_BIAS                         = $0D19;
+  GL_BLUE_SCALE                         = $0D1A;
+  GL_BLUE_BIAS                          = $0D1B;
+  GL_ALPHA_SCALE                        = $0D1C;
+  GL_ALPHA_BIAS                         = $0D1D;
+  GL_DEPTH_SCALE                        = $0D1E;
+  GL_DEPTH_BIAS                         = $0D1F;
+  GL_PIXEL_MAP_S_TO_S_SIZE              = $0CB1;
+  GL_PIXEL_MAP_I_TO_I_SIZE              = $0CB0;
+  GL_PIXEL_MAP_I_TO_R_SIZE              = $0CB2;
+  GL_PIXEL_MAP_I_TO_G_SIZE              = $0CB3;
+  GL_PIXEL_MAP_I_TO_B_SIZE              = $0CB4;
+  GL_PIXEL_MAP_I_TO_A_SIZE              = $0CB5;
+  GL_PIXEL_MAP_R_TO_R_SIZE              = $0CB6;
+  GL_PIXEL_MAP_G_TO_G_SIZE              = $0CB7;
+  GL_PIXEL_MAP_B_TO_B_SIZE              = $0CB8;
+  GL_PIXEL_MAP_A_TO_A_SIZE              = $0CB9;
+  GL_PIXEL_MAP_S_TO_S                   = $0C71;
+  GL_PIXEL_MAP_I_TO_I                   = $0C70;
+  GL_PIXEL_MAP_I_TO_R                   = $0C72;
+  GL_PIXEL_MAP_I_TO_G                   = $0C73;
+  GL_PIXEL_MAP_I_TO_B                   = $0C74;
+  GL_PIXEL_MAP_I_TO_A                   = $0C75;
+  GL_PIXEL_MAP_R_TO_R                   = $0C76;
+  GL_PIXEL_MAP_G_TO_G                   = $0C77;
+  GL_PIXEL_MAP_B_TO_B                   = $0C78;
+  GL_PIXEL_MAP_A_TO_A                   = $0C79;
+  GL_PACK_ALIGNMENT                     = $0D05;
+  GL_PACK_LSB_FIRST                     = $0D01;
+  GL_PACK_ROW_LENGTH                    = $0D02;
+  GL_PACK_SKIP_PIXELS                   = $0D04;
+  GL_PACK_SKIP_ROWS                     = $0D03;
+  GL_PACK_SWAP_BYTES                    = $0D00;
+  GL_UNPACK_ALIGNMENT                   = $0CF5;
+  GL_UNPACK_LSB_FIRST                   = $0CF1;
+  GL_UNPACK_ROW_LENGTH                  = $0CF2;
+  GL_UNPACK_SKIP_PIXELS                 = $0CF4;
+  GL_UNPACK_SKIP_ROWS                   = $0CF3;
+  GL_UNPACK_SWAP_BYTES                  = $0CF0;
+  GL_ZOOM_X                             = $0D16;
+  GL_ZOOM_Y                             = $0D17;
+
+  // Texture mapping
+  GL_TEXTURE_ENV                        = $2300;
+  GL_TEXTURE_ENV_MODE                   = $2200;
+  GL_TEXTURE_1D                         = $0DE0;
+  GL_TEXTURE_2D                         = $0DE1;
+  GL_TEXTURE_WRAP_S                     = $2802;
+  GL_TEXTURE_WRAP_T                     = $2803;
+  GL_TEXTURE_MAG_FILTER                 = $2800;
+  GL_TEXTURE_MIN_FILTER                 = $2801;
+  GL_TEXTURE_ENV_COLOR                  = $2201;
+  GL_TEXTURE_GEN_S                      = $0C60;
+  GL_TEXTURE_GEN_T                      = $0C61;
+  GL_TEXTURE_GEN_MODE                   = $2500;
+  GL_TEXTURE_BORDER_COLOR               = $1004;
+  GL_TEXTURE_WIDTH                      = $1000;
+  GL_TEXTURE_HEIGHT                     = $1001;
+  GL_TEXTURE_BORDER                     = $1005;
+  GL_TEXTURE_COMPONENTS                 = $1003;
+  GL_TEXTURE_RED_SIZE                   = $805C;
+  GL_TEXTURE_GREEN_SIZE                 = $805D;
+  GL_TEXTURE_BLUE_SIZE                  = $805E;
+  GL_TEXTURE_ALPHA_SIZE                 = $805F;
+  GL_TEXTURE_LUMINANCE_SIZE             = $8060;
+  GL_TEXTURE_INTENSITY_SIZE             = $8061;
+  GL_NEAREST_MIPMAP_NEAREST             = $2700;
+  GL_NEAREST_MIPMAP_LINEAR              = $2702;
+  GL_LINEAR_MIPMAP_NEAREST              = $2701;
+  GL_LINEAR_MIPMAP_LINEAR               = $2703;
+  GL_OBJECT_LINEAR                      = $2401;
+  GL_OBJECT_PLANE                       = $2501;
+  GL_EYE_LINEAR                         = $2400;
+  GL_EYE_PLANE                          = $2502;
+  GL_SPHERE_MAP                         = $2402;
+  GL_DECAL                              = $2101;
+  GL_MODULATE                           = $2100;
+  GL_NEAREST                            = $2600;
+  GL_REPEAT                             = $2901;
+  GL_CLAMP                              = $2900;
+  GL_S                                  = $2000;
+  GL_T                                  = $2001;
+  GL_R                                  = $2002;
+  GL_Q                                  = $2003;
+  GL_TEXTURE_GEN_R                      = $0C62;
+  GL_TEXTURE_GEN_Q                      = $0C63;
+{$ENDIF GL1_0}
+
+{$IFDEF GL1_1}
+
+const
+  // GL 1.1 texturing
+  GL_PROXY_TEXTURE_1D                   = $8063;
+  GL_PROXY_TEXTURE_2D                   = $8064;
+  GL_TEXTURE_PRIORITY                   = $8066;
+  GL_TEXTURE_RESIDENT                   = $8067;
+  GL_TEXTURE_BINDING_1D                 = $8068;
+  GL_TEXTURE_BINDING_2D                 = $8069;
+  GL_TEXTURE_INTERNAL_FORMAT            = $1003;
+
+  // Internal texture formats (GL 1.1)
+  GL_ALPHA4                             = $803B;
+  GL_ALPHA8                             = $803C;
+  GL_ALPHA12                            = $803D;
+  GL_ALPHA16                            = $803E;
+  GL_LUMINANCE4                         = $803F;
+  GL_LUMINANCE8                         = $8040;
+  GL_LUMINANCE12                        = $8041;
+  GL_LUMINANCE16                        = $8042;
+  GL_LUMINANCE4_ALPHA4                  = $8043;
+  GL_LUMINANCE6_ALPHA2                  = $8044;
+  GL_LUMINANCE8_ALPHA8                  = $8045;
+  GL_LUMINANCE12_ALPHA4                 = $8046;
+  GL_LUMINANCE12_ALPHA12                = $8047;
+  GL_LUMINANCE16_ALPHA16                = $8048;
+  GL_INTENSITY                          = $8049;
+  GL_INTENSITY4                         = $804A;
+  GL_INTENSITY8                         = $804B;
+  GL_INTENSITY12                        = $804C;
+  GL_INTENSITY16                        = $804D;
+  GL_R3_G3_B2                           = $2A10;
+  GL_RGB4                               = $804F;
+  GL_RGB5                               = $8050;
+  GL_RGB8                               = $8051;
+  GL_RGB10                              = $8052;
+  GL_RGB12                              = $8053;
+  GL_RGB16                              = $8054;
+  GL_RGBA2                              = $8055;
+  GL_RGBA4                              = $8056;
+  GL_RGB5_A1                            = $8057;
+  GL_RGBA8                              = $8058;
+  GL_RGB10_A2                           = $8059;
+  GL_RGBA12                             = $805A;
+  GL_RGBA16                             = $805B;
+
+{$ENDIF GL1_1}
+
+{$IFDEF GL1_2}
+
+const
+  // GL 1.2 texturing
+  GL_PACK_SKIP_IMAGES                   = $806B;
+  GL_PACK_IMAGE_HEIGHT                  = $806C;
+  GL_UNPACK_SKIP_IMAGES                 = $806D;
+  GL_UNPACK_IMAGE_HEIGHT                = $806E;
+  GL_TEXTURE_3D                         = $806F;
+  GL_PROXY_TEXTURE_3D                   = $8070;
+  GL_TEXTURE_DEPTH                      = $8071;
+  GL_TEXTURE_WRAP_R                     = $8072;
+  GL_MAX_3D_TEXTURE_SIZE                = $8073;
+  GL_TEXTURE_BINDING_3D                 = $806A;
+
+const
+  GL_RESCALE_NORMAL                     = $803A;
+  GL_CLAMP_TO_EDGE                      = $812F;
+  GL_MAX_ELEMENTS_VERTICES              = $F0E8;
+  GL_MAX_ELEMENTS_INDICES               = $F0E9;
+  GL_BGR                                = $80E0;
+  GL_BGRA                               = $80E1;
+  GL_UNSIGNED_BYTE_3_3_2                = $8032;
+  GL_UNSIGNED_BYTE_2_3_3_REV            = $8362;
+  GL_UNSIGNED_SHORT_5_6_5               = $8363;
+  GL_UNSIGNED_SHORT_5_6_5_REV           = $8364;
+  GL_UNSIGNED_SHORT_4_4_4_4             = $8033;
+  GL_UNSIGNED_SHORT_4_4_4_4_REV         = $8365;
+  GL_UNSIGNED_SHORT_5_5_5_1             = $8034;
+  GL_UNSIGNED_SHORT_1_5_5_5_REV         = $8366;
+  GL_UNSIGNED_INT_8_8_8_8               = $8035;
+  GL_UNSIGNED_INT_8_8_8_8_REV           = $8367;
+  GL_UNSIGNED_INT_10_10_10_2            = $8036;
+  GL_UNSIGNED_INT_2_10_10_10_REV        = $8368;
+  GL_LIGHT_MODEL_COLOR_CONTROL          = $81F8;
+  GL_SINGLE_COLOR                       = $81F9;
+  GL_SEPARATE_SPECULAR_COLOR            = $81FA;
+  GL_TEXTURE_MIN_LOD                    = $813A;
+  GL_TEXTURE_MAX_LOD                    = $813B;
+  GL_TEXTURE_BASE_LEVEL                 = $813C;
+  GL_TEXTURE_MAX_LEVEL                  = $813D;
+
+{$ENDIF GL1_2}
+
+const
+  // Utility
+  GL_VENDOR                             = $1F00;
+  GL_RENDERER                           = $1F01;
+  GL_VERSION                            = $1F02;
+  GL_EXTENSIONS                         = $1F03;
+
+  // Errors
+  GL_INVALID_VALUE                      = $0501;
+  GL_INVALID_ENUM                       = $0500;
+  GL_INVALID_OPERATION                  = $0502;
+  GL_STACK_OVERFLOW                     = $0503;
+  GL_STACK_UNDERFLOW                    = $0504;
+  GL_OUT_OF_MEMORY                      = $0505;
+
+
+// -------------------------------------------------------
+//   GL extensions constants
+// -------------------------------------------------------
+
+{$IFDEF EXTENSIONS}
+
+const
+  // GL_EXT_blend_minmax and GL_EXT_blend_color
+  GL_CONSTANT_COLOR_EXT                 = $8001;
+  GL_ONE_MINUS_CONSTANT_COLOR_EXT       = $8002;
+  GL_CONSTANT_ALPHA_EXT                 = $8003;
+  GL_ONE_MINUS_CONSTANT_ALPHA_EXT       = $8004;
+  GL_BLEND_EQUATION_EXT                 = $8009;
+  GL_MIN_EXT                            = $8007;
+  GL_MAX_EXT                            = $8008;
+  GL_FUNC_ADD_EXT                       = $8006;
+  GL_FUNC_SUBTRACT_EXT                  = $800A;
+  GL_FUNC_REVERSE_SUBTRACT_EXT          = $800B;
+  GL_BLEND_COLOR_EXT                    = $8005;
+
+  // GL_EXT_polygon_offset
+  GL_POLYGON_OFFSET_EXT                 = $8037;
+  GL_POLYGON_OFFSET_FACTOR_EXT          = $8038;
+  GL_POLYGON_OFFSET_BIAS_EXT            = $8039;
+
+  // GL_EXT_vertex_array
+  GL_VERTEX_ARRAY_EXT                   = $8074;
+  GL_NORMAL_ARRAY_EXT                   = $8075;
+  GL_COLOR_ARRAY_EXT                    = $8076;
+  GL_INDEX_ARRAY_EXT                    = $8077;
+  GL_TEXTURE_COORD_ARRAY_EXT            = $8078;
+  GL_EDGE_FLAG_ARRAY_EXT                = $8079;
+  GL_VERTEX_ARRAY_SIZE_EXT              = $807A;
+  GL_VERTEX_ARRAY_TYPE_EXT              = $807B;
+  GL_VERTEX_ARRAY_STRIDE_EXT            = $807C;
+  GL_VERTEX_ARRAY_COUNT_EXT             = $807D;
+  GL_NORMAL_ARRAY_TYPE_EXT              = $807E;
+  GL_NORMAL_ARRAY_STRIDE_EXT            = $807F;
+  GL_NORMAL_ARRAY_COUNT_EXT             = $8080;
+  GL_COLOR_ARRAY_SIZE_EXT               = $8081;
+  GL_COLOR_ARRAY_TYPE_EXT               = $8082;
+  GL_COLOR_ARRAY_STRIDE_EXT             = $8083;
+  GL_COLOR_ARRAY_COUNT_EXT              = $8084;
+  GL_INDEX_ARRAY_TYPE_EXT               = $8085;
+  GL_INDEX_ARRAY_STRIDE_EXT             = $8086;
+  GL_INDEX_ARRAY_COUNT_EXT              = $8087;
+  GL_TEXTURE_COORD_ARRAY_SIZE_EXT       = $8088;
+  GL_TEXTURE_COORD_ARRAY_TYPE_EXT       = $8089;
+  GL_TEXTURE_COORD_ARRAY_STRIDE_EXT     = $808A;
+  GL_TEXTURE_COORD_ARRAY_COUNT_EXT      = $808B;
+  GL_EDGE_FLAG_ARRAY_STRIDE_EXT         = $808C;
+  GL_EDGE_FLAG_ARRAY_COUNT_EXT          = $808D;
+  GL_VERTEX_ARRAY_POINTER_EXT           = $808E;
+  GL_NORMAL_ARRAY_POINTER_EXT           = $808F;
+  GL_COLOR_ARRAY_POINTER_EXT            = $8090;
+  GL_INDEX_ARRAY_POINTER_EXT            = $8091;
+  GL_TEXTURE_COORD_ARRAY_POINTER_EXT    = $8092;
+  GL_EDGE_FLAG_ARRAY_POINTER_EXT        = $8093;
+
+  // GL_EXT_texture_object
+  GL_TEXTURE_PRIORITY_EXT               = $8066;
+  GL_TEXTURE_RESIDENT_EXT               = $8067;
+  GL_TEXTURE_1D_BINDING_EXT             = $8068;
+  GL_TEXTURE_2D_BINDING_EXT             = $8069;
+
+  // GL_EXT_texture3D
+  GL_PACK_SKIP_IMAGES_EXT               = $806B;
+  GL_PACK_IMAGE_HEIGHT_EXT              = $806C;
+  GL_UNPACK_SKIP_IMAGES_EXT             = $806D;
+  GL_UNPACK_IMAGE_HEIGHT_EXT            = $806E;
+  GL_TEXTURE_3D_EXT                     = $806F;
+  GL_PROXY_TEXTURE_3D_EXT               = $8070;
+  GL_TEXTURE_DEPTH_EXT                  = $8071;
+  GL_TEXTURE_WRAP_R_EXT                 = $8072;
+  GL_MAX_3D_TEXTURE_SIZE_EXT            = $8073;
+  GL_TEXTURE_3D_BINDING_EXT             = $806A;
+
+  // GL_EXT_paletted_texture
+  GL_TABLE_TOO_LARGE_EXT                = $8031;
+  GL_COLOR_TABLE_FORMAT_EXT             = $80D8;
+  GL_COLOR_TABLE_WIDTH_EXT              = $80D9;
+  GL_COLOR_TABLE_RED_SIZE_EXT           = $80DA;
+  GL_COLOR_TABLE_GREEN_SIZE_EXT         = $80DB;
+  GL_COLOR_TABLE_BLUE_SIZE_EXT          = $80DC;
+  GL_COLOR_TABLE_ALPHA_SIZE_EXT         = $80DD;
+  GL_COLOR_TABLE_LUMINANCE_SIZE_EXT     = $80DE;
+  GL_COLOR_TABLE_INTENSITY_SIZE_EXT     = $80DF;
+  GL_TEXTURE_INDEX_SIZE_EXT             = $80ED;
+  GL_COLOR_INDEX1_EXT                   = $80E2;
+  GL_COLOR_INDEX2_EXT                   = $80E3;
+  GL_COLOR_INDEX4_EXT                   = $80E4;
+  GL_COLOR_INDEX8_EXT                   = $80E5;
+  GL_COLOR_INDEX12_EXT                  = $80E6;
+  GL_COLOR_INDEX16_EXT                  = $80E7;
+
+  // GL_EXT_shared_texture_palette
+  GL_SHARED_TEXTURE_PALETTE_EXT         = $81FB;
+
+  // GL_EXT_point_parameters
+  GL_POINT_SIZE_MIN_EXT                 = $8126;
+  GL_POINT_SIZE_MAX_EXT                 = $8127;
+  GL_POINT_FADE_THRESHOLD_SIZE_EXT      = $8128;
+  GL_DISTANCE_ATTENUATION_EXT           = $8129;
+
+  // GL_EXT_rescale_normal
+  GL_RESCALE_NORMAL_EXT                 = $803A;
+
+  // GL_EXT_abgr
+  GL_ABGR_EXT                           = $8000;
+
+const
+  // GL_EXT_multitexture
+  GL_SELECTED_TEXTURE_EXT               = $83C0;
+  GL_SELECTED_TEXTURE_COORD_SET_EXT     = $83C1;
+  GL_SELECTED_TEXTURE_TRANSFORM_EXT     = $83C2;
+  GL_MAX_TEXTURES_EXT                   = $83C3;
+  GL_MAX_TEXTURE_COORD_SETS_EXT         = $83C4;
+  GL_TEXTURE_ENV_COORD_SET_EXT          = $83C5;
+  GL_TEXTURE0_EXT                       = $83C6;
+  GL_TEXTURE1_EXT                       = $83C7;
+  GL_TEXTURE2_EXT                       = $83C8;
+  GL_TEXTURE3_EXT                       = $83C9;
+
+{$ENDIF EXTENSIONS}
+
+{$IFDEF SGI_EXTENSIONS}
+
+const
+  // GL_SGIS_multitexture
+  GL_SELECTED_TEXTURE_SGIS              = $835C;
+  GL_SELECTED_TEXTURE_COORD_SET_SGIS    = $835D;
+  GL_MAX_TEXTURES_SGIS                  = $835E;
+  GL_TEXTURE0_SGIS                      = $835F;
+  GL_TEXTURE1_SGIS                      = $8360;
+  GL_TEXTURE2_SGIS                      = $8361;
+  GL_TEXTURE3_SGIS                      = $8362;
+  GL_TEXTURE_COORD_SET_SOURCE_SGIS      = $8363;
+
+const
+  // GL_SGIS_texture_edge_clamp
+  GL_CLAMP_TO_EDGE_SGIS                 = $812F;
+
+{$ENDIF SGI_EXTENSIONS}
+
+{$IFDEF MESA}
+{$ENDIF MESA}
+
+
+// -------------------------------------------------------
+//   GL procedures and functions
+// -------------------------------------------------------
+
+{$IFDEF GL1_0}
+var
+// Miscellaneous
+glClearIndex: procedure(c: Single); cdecl;
+glClearColor: procedure(red, green, blue, alpha: GLclampf); cdecl;
+glClear: procedure(mask: GLbitfield); cdecl;
+glIndexMask: procedure(mask: LongWord); cdecl;
+glColorMask: procedure(red, green, blue, alpha: GLboolean); cdecl;
+glAlphaFunc: procedure(func: GLenum; ref: GLclampf); cdecl;
+glBlendFunc: procedure(sfactor, dfactor: GLenum); cdecl;
+glLogicOp: procedure(opcode: GLenum); cdecl;
+glCullFace: procedure(mode: GLenum); cdecl;
+glFrontFace: procedure(mode: GLenum); cdecl;
+glPointSize: procedure(size: Single); cdecl;
+glLineWidth: procedure(width: Single); cdecl;
+glLineStipple: procedure(factor: LongInt; pattern: Word); cdecl;
+glPolygonMode: procedure(face, mode: GLenum); cdecl;
+glPolygonOffset: procedure(factor, units: Single); cdecl;
+glPolygonStipple: procedure(var mask: Byte); cdecl;
+glGetPolygonStipple: procedure(var mask: Byte); cdecl;
+glEdgeFlag: procedure(flag: GLBoolean); cdecl;
+glEdgeFlagv: procedure(var flag: GLBoolean); cdecl;
+glScissor: procedure(x, y, width, height: LongInt); cdecl;
+glClipPlane: procedure(plane: GLenum; var equation: Double); cdecl;
+glGetClipPlane: procedure(plane: GLenum; var equation: Double); cdecl;
+glDrawBuffer: procedure(mode: GLenum); cdecl;
+glReadBuffer: procedure(mode: GLenum); cdecl;
+glEnable: procedure(cap: LongInt); cdecl;
+glDisable: procedure(cap: LongInt); cdecl;
+glIsEnabled: function(cap: GLenum): GLBoolean; cdecl;
+glGetBooleanv: procedure(pname: GLenum; params : PGLBoolean); cdecl;
+glGetDoublev: procedure(pname: GLenum; params : PDouble); cdecl;
+glGetFloatv: procedure(pname: GLenum; params : PSingle); cdecl;
+glGetIntegerv: procedure(pname: GLenum; params : PLongInt); cdecl;
+glPushAttrib: procedure(mask: GLbitfield); cdecl;
+glPopAttrib: procedure; cdecl;
+glRenderMode: function(mode: GLenum): LongInt; cdecl;
+glGetError: function: GLenum; cdecl;
+glGetString: function(name: GLenum): PChar; cdecl;
+glFinish: procedure; cdecl;
+glFlush: procedure; cdecl;
+glHint: procedure(target, mode: GLenum); cdecl;
+
+// Depth Buffer
+glClearDepth: procedure(depth: GLclampd); cdecl;
+glDepthFunc: procedure(func: LongInt); cdecl;
+glDepthMask: procedure(flag: GLBoolean); cdecl;
+glDepthRange: procedure(near_val, far_val: GLclampd); cdecl;
+
+// Accumulation Buffer
+glClearAccum: procedure(red, green, blue, alpha: Single); cdecl;
+glAccum: procedure(op: GLenum; value: Single); cdecl;
+
+// Tranformation
+glMatrixMode: procedure(mode: GLenum); cdecl;
+glOrtho: procedure(left, right, bottom, top, near_val, far_val: Double); cdecl;
+glFrustum: procedure(left, right, bottom, top, near_val, far_val: Double); cdecl;
+glViewport: procedure(x, y, width, height: LongInt); cdecl;
+glPushMatrix: procedure; cdecl;
+glPopMatrix: procedure; cdecl;
+glLoadIdentity: procedure; cdecl;
+glLoadMatrixd: procedure(var m: Double); cdecl;
+glLoadMatrixf: procedure(var m: PSingle); cdecl;
+glMultMatrixd: procedure(var m: Double); cdecl;
+glMultMatrixf: procedure(var m: Single); cdecl;
+glRotated: procedure(angle, x, y, z: Double); cdecl;
+glRotatef: procedure(angle, x, y, z: Single); cdecl;
+glScaled: procedure(x, y, z: Double); cdecl;
+glScalef: procedure(x, y, z: Single); cdecl;
+glTranslated: procedure(x, y, z: Double); cdecl;
+glTranslatef: procedure(x, y, z: Single); cdecl;
+
+// Display Lists
+glIsList: function(list: LongWord): GLBoolean; cdecl;
+glDeleteLists: procedure(list: LongWord; range: LongInt); cdecl;
+glGenLists: function(range: LongInt): LongWord; cdecl;
+glNewList: procedure(list: LongWord; mode: GLenum); cdecl;
+glEndList: procedure; cdecl;
+glCallList: procedure(list: LongWord); cdecl;
+glCallLists: procedure(n: LongInt; AType: GLenum; var lists); cdecl;
+glListBase: procedure(base: LongWord); cdecl;
+
+// Drawing Functions
+glBegin: procedure(mode: GLenum); cdecl;
+glEnd: procedure; cdecl;
+glVertex2d: procedure(x, y: Double); cdecl;
+glVertex2f: procedure(x, y: Single); cdecl;
+glVertex2i: procedure(x, y: LongInt); cdecl;
+glVertex2s: procedure(x, y: SmallInt); cdecl;
+glVertex3d: procedure(x, y, z: Double); cdecl;
+glVertex3f: procedure(x, y, z: Single); cdecl;
+glVertex3i: procedure(x, y, z: LongInt); cdecl;
+glVertex3s: procedure(x, y, z: SmallInt); cdecl;
+glVertex4d: procedure(x, y, z, w: Double); cdecl;
+glVertex4f: procedure(x, y, z, w: Single); cdecl;
+glVertex4i: procedure(x, y, z, w: LongInt); cdecl;
+glVertex4s: procedure(x, y, z, w: SmallInt); cdecl;
+glVertex2dv: procedure(var v: Double); cdecl;
+glVertex2fv: procedure(var v: Single); cdecl;
+glVertex2iv: procedure(var v: LongInt); cdecl;
+glVertex2sv: procedure(var v: SmallInt); cdecl;
+glVertex3dv: procedure(var v: Double); cdecl;
+glVertex3fv: procedure(var v: Single); cdecl;
+glVertex3iv: procedure(var v: LongInt); cdecl;
+glVertex3sv: procedure(var v: SmallInt); cdecl;
+glVertex4dv: procedure(var v: Double); cdecl;
+glVertex4fv: procedure(var v: Single); cdecl;
+glVertex4iv: procedure(var v: LongInt); cdecl;
+glVertex4sv: procedure(var v: SmallInt); cdecl;
+glNormal3b: procedure(nx, ny, nz: Byte); cdecl;
+glNormal3d: procedure(nx, ny, nz: Double); cdecl;
+glNormal3f: procedure(nx, ny, nz: Single); cdecl;
+glNormal3i: procedure(nx, ny, nz: LongInt); cdecl;
+glNormal3s: procedure(nx, ny, nz: SmallInt); cdecl;
+glNormal3bv: procedure(var v: ShortInt); cdecl;
+glNormal3dv: procedure(var v: Double); cdecl;
+glNormal3fv: procedure(var v: Single); cdecl;
+glNormal3iv: procedure(var v: LongInt); cdecl;
+glNormal3sv: procedure(var v: SmallInt); cdecl;
+glIndexd: procedure(c: Double); cdecl;
+glIndexf: procedure(c: Single); cdecl;
+glIndexi: procedure(c: LongInt); cdecl;
+glIndexs: procedure(c: SmallInt); cdecl;
+glIndexdv: procedure(var c: Double); cdecl;
+glIndexfv: procedure(var c: Single); cdecl;
+glIndexiv: procedure(var c: LongInt); cdecl;
+glIndexsv: procedure(var c: SmallInt); cdecl;
+glColor3b: procedure (red, green, blue: ShortInt); cdecl;
+glColor3d: procedure (red, green, blue: Double); cdecl;
+glColor3f: procedure (red, green, blue: Single); cdecl;
+glColor3i: procedure (red, green, blue: LongInt); cdecl;
+glColor3s: procedure (red, green, blue: SmallInt); cdecl;
+glColor3ub: procedure(red, green, blue: Byte); cdecl;
+glColor3ui: procedure(red, green, blue: LongWord); cdecl;
+glColor3us: procedure(red, green, blue: Word); cdecl;
+glColor4b: procedure (red, green, blue, alpha: ShortInt); cdecl;
+glColor4d: procedure (red, green, blue, alpha: Double); cdecl;
+glColor4f: procedure (red, green, blue, alpha: Single); cdecl;
+glColor4i: procedure (red, green, blue, alpha: LongInt); cdecl;
+glColor4s: procedure (red, green, blue, alpha: SmallInt); cdecl;
+glColor4ub: procedure(red, green, blue, alpha: Byte); cdecl;
+glColor4ui: procedure(red, green, blue, alpha: LongWord); cdecl;
+glColor4us: procedure(red, green, blue, alpha: Word); cdecl;
+glColor3bv: procedure (var v: ShortInt); cdecl;
+glColor3dv: procedure (var v: Double); cdecl;
+glColor3fv: procedure (var v: Single); cdecl;
+glColor3iv: procedure (var v: LongInt); cdecl;
+glColor3sv: procedure (var v: SmallInt); cdecl;
+glColor3ubv: procedure(var v: Byte); cdecl;
+glColor3uiv: procedure(var v: LongWord); cdecl;
+glColor3usv: procedure(var v: Word); cdecl;
+glColor4bv: procedure (var v: ShortInt); cdecl;
+glColor4dv: procedure (var v: Double); cdecl;
+glColor4fv: procedure (var v: Single); cdecl;
+glColor4iv: procedure (var v: LongInt); cdecl;
+glColor4sv: procedure (var v: SmallInt); cdecl;
+glColor4ubv: procedure(var v: Byte); cdecl;
+glColor4uiv: procedure(var v: LongWord); cdecl;
+glColor4usv: procedure(var v: Word); cdecl;
+glTexCoord1d: procedure(s: Double); cdecl;
+glTexCoord1f: procedure(s: Single); cdecl;
+glTexCoord1i: procedure(s: LongInt); cdecl;
+glTexCoord1s: procedure(s: SmallInt); cdecl;
+glTexCoord2d: procedure(s, t: Double); cdecl;
+glTexCoord2f: procedure(s, t: Single); cdecl;
+glTexCoord2i: procedure(s, t: LongInt); cdecl;
+glTexCoord2s: procedure(s, t: SmallInt); cdecl;
+glTexCoord3d: procedure(s, t, r: Double); cdecl;
+glTexCoord3f: procedure(s, t, r: Single); cdecl;
+glTexCoord3i: procedure(s, t, r: LongInt); cdecl;
+glTexCoord3s: procedure(s, t, r: SmallInt); cdecl;
+glTexCoord4d: procedure(s, t, r, q: Double); cdecl;
+glTexCoord4f: procedure(s, t, r, q: Single); cdecl;
+glTexCoord4i: procedure(s, t, r, q: LongInt); cdecl;
+glTexCoord4s: procedure(s, t, r, q: SmallInt); cdecl;
+glTexCoord1dv: procedure(var v: Double); cdecl;
+glTexCoord1fv: procedure(var v: Single); cdecl;
+glTexCoord1iv: procedure(var v: LongInt); cdecl;
+glTexCoord1sv: procedure(var v: SmallInt); cdecl;
+glTexCoord2dv: procedure(var v: Double); cdecl;
+glTexCoord2fv: procedure(var v: Single); cdecl;
+glTexCoord2iv: procedure(var v: LongInt); cdecl;
+glTexCoord2sv: procedure(var v: SmallInt); cdecl;
+glTexCoord3dv: procedure(var v: Double); cdecl;
+glTexCoord3fv: procedure(var v: Single); cdecl;
+glTexCoord3iv: procedure(var v: LongInt); cdecl;
+glTexCoord3sv: procedure(var v: SmallInt); cdecl;
+glTexCoord4dv: procedure(var v: Double); cdecl;
+glTexCoord4fv: procedure(var v: Single); cdecl;
+glTexCoord4iv: procedure(var v: LongInt); cdecl;
+glTexCoord4sv: procedure(var v: SmallInt); cdecl;
+glRasterPos2d: procedure(x, y: Double); cdecl;
+glRasterPos2f: procedure(x, y: Single); cdecl;
+glRasterPos2i: procedure(x, y: LongInt); cdecl;
+glRasterPos2s: procedure(x, y: SmallInt); cdecl;
+glRasterPos3d: procedure(x, y, z: Double); cdecl;
+glRasterPos3f: procedure(x, y, z: Single); cdecl;
+glRasterPos3i: procedure(x, y, z: LongInt); cdecl;
+glRasterPos3s: procedure(x, y, z: SmallInt); cdecl;
+glRasterPos4d: procedure(x, y, z, w: Double); cdecl;
+glRasterPos4f: procedure(x, y, z, w: Single); cdecl;
+glRasterPos4i: procedure(x, y, z, w: LongInt); cdecl;
+glRasterPos4s: procedure(x, y, z, w: SmallInt); cdecl;
+glRasterPos2dv: procedure(var v: Double); cdecl;
+glRasterPos2fv: procedure(var v: Single); cdecl;
+glRasterPos2iv: procedure(var v: LongInt); cdecl;
+glRasterPos2sv: procedure(var v: SmallInt); cdecl;
+glRasterPos3dv: procedure(var v: Double); cdecl;
+glRasterPos3fv: procedure(var v: Single); cdecl;
+glRasterPos3iv: procedure(var v: LongInt); cdecl;
+glRasterPos3sv: procedure(var v: SmallInt); cdecl;
+glRasterPos4dv: procedure(var v: Double); cdecl;
+glRasterPos4fv: procedure(var v: Single); cdecl;
+glRasterPos4iv: procedure(var v: LongInt); cdecl;
+glRasterPos4sv: procedure(var v: SmallInt); cdecl;
+glRectd: procedure(x1, y1, x2, y2: Double); cdecl;
+glRectf: procedure(x1, y1, x2, y2: Single); cdecl;
+glRecti: procedure(x1, y1, x2, y2: LongInt); cdecl;
+glRects: procedure(x1, y1, x2, y2: SmallInt); cdecl;
+glRectdv: procedure(var v1, v2: Double); cdecl;
+glRectfv: procedure(var v1, v2: Single); cdecl;
+glRectiv: procedure(var v1, v2: LongInt); cdecl;
+glRectsv: procedure(var v1, v2: SmallInt); cdecl;
+
+// Lighting
+glShadeModel: procedure(mode: GLenum); cdecl;
+glLightf: procedure(light, pname: GLenum; param: Single); cdecl;
+glLighti: procedure(light, pname: GLenum; param: LongInt); cdecl;
+glLightfv: procedure(light, pname: GLenum; params : PSingle); cdecl;
+glLightiv: procedure(light, pname: GLenum; params : PLongInt); cdecl;
+glGetLightfv: procedure(light, pname: GLenum; params : PSingle); cdecl;
+glGetLightiv: procedure(light, pname: GLenum; params : PLongInt); cdecl;
+glLightModelf: procedure(pname: GLenum; param: Single); cdecl;
+glLightModeli: procedure(pname: GLenum; param: LongInt); cdecl;
+glLightModelfv: procedure(pname: GLenum; params : PSingle); cdecl;
+glLightModeliv: procedure(pname: GLenum; params : PLongInt); cdecl;
+glMaterialf: procedure(face, pname: GLenum; param: Single); cdecl;
+glMateriali: procedure(face, pname: GLenum; param: LongInt); cdecl;
+glMaterialfv: procedure(face, pname: GLenum; params : PSingle); cdecl;
+glMaterialiv: procedure(face, pname: GLenum; params : PLongInt); cdecl;
+glGetMaterialfv: procedure(face, pname: GLenum; params : PSingle); cdecl;
+glGetMaterialiv: procedure(face, pname: GLenum; params : PLongInt); cdecl;
+glColorMaterial: procedure(face, mode: GLenum); cdecl;
+
+// Raster Functions
+glPixelZoom: procedure(xfactor, yfactor: Single); cdecl;
+glPixelStoref: procedure(pname: GLenum; param: Single); cdecl;
+glPixelStorei: procedure(pname: GLenum; param: LongInt); cdecl;
+glPixelTransferf: procedure(pname: GLenum; param: Single); cdecl;
+glPixelTransferi: procedure(pname: GLenum; param: LongInt); cdecl;
+glPixelMapfv: procedure(map: GLenum; mapsize: LongInt; var values: Single); cdecl;
+glPixelMapuiv: procedure(map: GLenum; mapsize: LongInt; var values: LongWord); cdecl;
+glPixelMapusv: procedure(map: GLenum; mapsize: LongInt; var values: Word); cdecl;
+glGetPixelMapfv: procedure(map: GLenum; var values: Single); cdecl;
+glGetPixelMapuiv: procedure(map: GLenum; var values: LongWord); cdecl;
+glGetPixelMapusv: procedure(map: GLenum; var values: Word); cdecl;
+glBitmap: procedure(width, height: LongInt; xorig, yorig, xmove, ymove: Single; var bitmap); cdecl;
+glReadPixels: procedure(x, y, width, height: LongInt; format, AType: GLenum; var pixels); cdecl;
+glDrawPixels: procedure(width, height: LongInt; format, AType: GLenum; var pixels); cdecl;
+glCopyPixels: procedure(x, y, width, height: LongInt; AType: GLenum); cdecl;
+
+// Stenciling
+glStencilFunc: procedure(func: GLenum; ref: LongInt; mask: LongWord); cdecl;
+glStencilMask: procedure(mask: LongWord); cdecl;
+glStencilOp: procedure(fail, zfail, zpass: GLenum); cdecl;
+glClearStencil: procedure(s: LongInt); cdecl;
+
+// Texture Mapping
+glTexGend: procedure(cord, pname: GLenum; param: Double); cdecl;
+glTexGenf: procedure(cord, pname: GLenum; param: Single); cdecl;
+glTexGeni: procedure(cord, pname: GLenum; param: LongInt); cdecl;
+glTexGendv: procedure(cord, pname: GLenum; params : PDouble); cdecl;
+glTexGenfv: procedure(cord, pname: GLenum; params : PSingle); cdecl;
+glTexGeniv: procedure(cord, pname: GLenum; params : PLongInt); cdecl;
+glGetTexGendv: procedure(cord, pname: GLenum; params : PDouble); cdecl;
+glGetTexGenfv: procedure(cord, pname: GLenum; params : PSingle); cdecl;
+glGetTexGeniv: procedure(cord, pname: GLenum; params : PLongInt); cdecl;
+glTexEnvf: procedure(target, pname: GLenum; param: Single); cdecl;
+glTexEnvi: procedure(target, pname: GLenum; param: LongInt); cdecl;
+glTexEnvfv: procedure(target, pname: GLenum; params : PSingle); cdecl;
+glTexEnviv: procedure(target, pname: GLenum; params : PLongInt); cdecl;
+glGetTexEnvfv: procedure(target, pname: GLenum; params : PSingle); cdecl;
+glGetTexEnviv: procedure(target, pname: GLenum; params : PLongInt); cdecl;
+glTexParameterf: procedure(target, pname: GLenum; param: Single); cdecl;
+glTexParameteri: procedure(target, pname: GLenum; param: LongInt); cdecl;
+glTexParameterfv: procedure(target, pname: GLenum; params : PSingle); cdecl;
+glTexParameteriv: procedure(target, pname: GLenum; params : PLongInt); cdecl;
+glGetTexParameterfv: procedure(target, pname: GLenum; params : PSingle); cdecl;
+glGetTexParameteriv: procedure(target, pname: GLenum; params : PLongInt); cdecl;
+glGetTexLevelParameterfv: procedure(target: GLenum; level: LongInt; pname: GLenum; params : PSingle); cdecl;
+glGetTexLevelParameteriv: procedure(target: GLenum; level: LongInt; pname: GLenum; params : PLongInt); cdecl;
+glTexImage1D: procedure(target: GLenum; level, internalFormat, width, border: LongInt; format, AType: GLenum; var pixels); cdecl;
+glTexImage2D: procedure(target: GLenum; level, internalFormat, width, height, border: LongInt; format, AType: GLenum; var pixels); cdecl;
+glGetTexImage: procedure(target: GLenum; level: LongInt; format, AType: GLenum; var pixels); cdecl;
+
+// Evaluators
+glMap1d: procedure(target: GLenum; u1, u2: Double; stride, order: LongInt; var points: Double); cdecl;
+glMap1f: procedure(target: GLenum; u1, u2: Single; stride, order: LongInt; var points: Single); cdecl;
+glMap2d: procedure(target: GLenum; u1, u2: Double; ustride, uorder: LongInt; v1, v2: Double; vstride, vorder: LongInt; var points: Double); cdecl;
+glMap2f: procedure(target: GLenum; u1, u2: Single; ustride, uorder: LongInt; v1, v2: Single; vstride, vorder: LongInt; var points: Single); cdecl;
+glGetMapdv: procedure(target, query: GLenum; var v: Double); cdecl;
+glGetMapfv: procedure(target, query: GLenum; var v: Single); cdecl;
+glGetMapiv: procedure(target, query: GLenum; var v: LongInt); cdecl;
+glEvalCoord1d: procedure(u: Double); cdecl;
+glEvalCoord1f: procedure(u: Single); cdecl;
+glEvalCoord1dv: procedure(var u: Double); cdecl;
+glEvalCoord1fv: procedure(var u: Single); cdecl;
+glEvalCoord2d: procedure(u, v: Double); cdecl;
+glEvalCoord2f: procedure(u, v: Single); cdecl;
+glEvalCoord2dv: procedure(var u, v: Double); cdecl;
+glEvalCoord2fv: procedure(var u, v: Single); cdecl;
+glMapGrid1d: procedure(un: LongInt; u1, u2: Double); cdecl;
+glMapGrid1f: procedure(un: LongInt; u1, u2: Single); cdecl;
+glMapGrid2d: procedure(un: LongInt; u1, u2: Double; vn: LongInt; v1, v2: Double); cdecl;
+glMapGrid2f: procedure(un: LongInt; u1, u2: Single; vn: LongInt; v1, v2: Single); cdecl;
+glEvalPoint1: procedure(i: LongInt); cdecl;
+glEvalPoint2: procedure(i, j: LongInt); cdecl;
+glEvalMesh1: procedure(mode: GLenum; i1, i2: LongInt); cdecl;
+glEvalMesh2: procedure(mode: GLenum; i1, i2, j1, j2: LongInt); cdecl;
+
+// Fog
+glFogf: procedure(pname: GLenum; param: Single); cdecl;
+glFogi: procedure(pname: GLenum; param: LongInt); cdecl;
+glFogfv: procedure(pname: GLenum; params : PSingle); cdecl;
+glFogiv: procedure(pname: GLenum; params : PLongInt); cdecl;
+
+// Selection and Feedback
+glFeedbackBuffer: procedure(size: LongInt; AType: GLenum; var buffer: Single); cdecl;
+glPassThrough: procedure(token: Single); cdecl;
+glSelectBuffer: procedure(size: LongInt; var buffer: LongWord); cdecl;
+glInitNames: procedure; cdecl;
+glLoadName: procedure(name: LongWord); cdecl;
+glPushName: procedure(name: LongWord); cdecl;
+glPopName: procedure; cdecl;
+
+{$ENDIF GL1_0}
+
+{$IFDEF GL1_1}
+var
+
+// Miscellaneous
+glEnableClientState: procedure(cap: GLenum); cdecl;
+glDisableClientState: procedure(cap: GLenum); cdecl;
+glPushClientAttrib: procedure(mask: GLbitfield); cdecl;
+glPopClientAttrib: procedure; cdecl;
+
+// Drawing Functions
+glIndexub: procedure(c: Byte); cdecl;
+glIndexubv: procedure(var c: Byte); cdecl;
+
+// Vertex Arrays
+glVertexPointer: procedure(size: LongInt; AType: GLenum; stride: LongInt; var ptr); cdecl;
+glNormalPointer: procedure(AType: GLenum; stride: LongInt; var ptr); cdecl;
+glColorPointer: procedure(size: LongInt; AType: GLenum; stride: LongInt; var ptr); cdecl;
+glIndexPointer: procedure(AType: GLenum; stride: LongInt; var ptr); cdecl;
+glTexCoordPointer: procedure(size: LongInt; AType: GLenum; stride: LongInt; var ptr); cdecl;
+glEdgeFlagPointer: procedure(stride: LongInt; var ptr); cdecl;
+glGetPointerv: procedure(pname: GLenum; var params: Pointer); cdecl;
+glArrayElement: procedure(i: LongInt); cdecl;
+glDrawArrays: procedure(mode: GLenum; first, count: LongInt); cdecl;
+glDrawElements: procedure(mode: GLenum; count: Integer; AType: GLenum; var indices); cdecl;
+glInterleavedArrays: procedure(format: GLenum; stride: LongInt; var pointer); cdecl;
+
+// Texture Mapping
+glGenTextures: procedure(n: LongInt; var textures: LongWord); cdecl;
+glDeleteTextures: procedure(n: LongInt; var textures: LongWord); cdecl;
+glBindTexture: procedure(target: GLenum; texture: LongWord); cdecl;
+glPrioritizeTextures: procedure(n: LongInt; var textures: LongWord; var priorities: GLclampf); cdecl;
+glAreTexturesResident: function(n: LongInt; var textures: LongWord; var residences: Boolean): Boolean; cdecl;
+glIsTexture: function(texture: LongWord): Boolean; cdecl;
+glTexSubImage1D: procedure(target: GLenum; level, xoffset, width: LongInt; format, AType: GLenum; var pixels); cdecl;
+glTexSubImage2D: procedure(target: GLenum; level, xoffset, yoffset, width, height: LongInt; format, AType: GLenum; var pixels); cdecl;
+glCopyTexImage1D: procedure(target: GLenum; level: LongInt; format: GLenum; x, y, width, border: LongInt); cdecl;
+glCopyTexImage2D: procedure(target: GLenum; level: LongInt; format: GLenum; x, y, width, height, border: LongInt); cdecl;
+glCopyTexSubImage1D: procedure(target: GLenum; level, xoffset, x, y, width: LongInt); cdecl;
+glCopyTexSubImage2D: procedure(target: GLenum; level, xoffset, yoffset, x, y, width, height: LongInt); cdecl;
+
+{$ENDIF GL1_1}
+
+{$IFDEF GL1_2}
+var
+glDrawRangeElements: procedure(mode: GLenum; AStart, AEnd: LongWord; count: LongInt; AType: GLenum; var indices); cdecl;
+glTexImage3D: procedure(target: GLenum; level: LongInt; internalFormat: GLenum; width, height, depth, border: LongInt; format, AType: GLEnum; var pixels); cdecl;
+glTexSubImage3D: procedure(target: GLenum; level: LongInt; xoffset, yoffset, zoffset, width, height, depth: LongInt; format, AType: GLEnum; var pixels); cdecl;
+glCopyTexSubImage3D: procedure(target: GLenum; level: LongInt; xoffset, yoffset, zoffset, x, y, width, height: LongInt); cdecl;
+{$ENDIF GL1_2}
+
+
+// -------------------------------------------------------
+//   GL Extensions
+// -------------------------------------------------------
+
+{$IFDEF EXTENSIONS}
+var
+
+// === 1.0 Extensions ===
+
+// GL_EXT_blend_minmax
+glBlendEquationEXT: procedure(mode: GLenum); cdecl;
+
+// GL_EXT_blend_color
+glBlendColorEXT: procedure(red, green, blue, alpha: GLclampf); cdecl;
+
+// GL_EXT_polygon_offset
+glPolygonOffsetEXT: procedure(factor, bias: Single); cdecl;
+
+// GL_EXT_vertex_array
+glVertexPointerEXT: procedure(size: LongInt; AType: GLenum; stride, count: LongInt; var ptr); cdecl;
+glNormalPointerEXT: procedure(AType: GLenum; stride, count: LongInt; var ptr); cdecl;
+glColorPointerEXT: procedure(size: LongInt; AType: GLenum; stride, count: LongInt; var ptr); cdecl;
+glIndexPointerEXT: procedure(AType: GLenum; stride, count: LongInt; var ptr); cdecl;
+glTexCoordPointerEXT: procedure(size: LongInt; AType: GLenum; stride, count: LongInt; var ptr); cdecl;
+glEdgeFlagPointerEXT: procedure(stride, count: LongInt; var ptr: Boolean); cdecl;
+glGetPointervEXT: procedure(pname: GLenum; var params: Pointer); cdecl;
+glArrayElementEXT: procedure(i: LongInt); cdecl;
+glDrawArraysEXT: procedure(mode: GLEnum; first, count: LongInt); cdecl;
+
+// GL_EXT_texture_object
+glGenTexturesEXT: procedure(n: LongInt; var textures: LongWord); cdecl;
+glDeleteTexturesEXT: procedure(n: LongInt; var textures: LongWord); cdecl;
+glBindTextureEXT: procedure(target: GLenum; texture: LongWord); cdecl;
+glPrioritizeTexturesEXT: procedure(n: LongInt; var textures: LongWord; var priorities: GLClampf); cdecl;
+glAreTexturesResidentEXT: function(n: LongInt; var textures: LongWord; var residences: Boolean): Boolean; cdecl;
+glIsTextureEXT: function(texture: LongWord): Boolean; cdecl;
+
+// GL_EXT_texture3D
+glTexImage3DEXT: procedure(target: GLenum; level: LongInt; internalFormat: GLenum; width, height, depth, border: LongInt; format, AType: GLenum; var pixels); cdecl;
+glTexSubImage3DEXT: procedure(target: GLenum; level, xoffset, yoffset, zoffset, width, height, depth: LongInt; format, AType: GLenum; var pixels); cdecl;
+glCopyTexSubImage3DEXT: procedure(target: GLenum; level, xoffset, yoffset, zoffset, x, y, width, height: LongInt); cdecl;
+
+// GL_EXT_color_table
+glColorTableEXT: procedure(target, internalformat: GLenum; width: LongInt; format, AType: GLenum; var table); cdecl;
+glColorSubTableEXT: procedure(target: GLenum; start, count: LongInt; format, AType: GLEnum; var data); cdecl;
+glGetColorTableEXT: procedure(target, format, AType: GLenum; var table); cdecl;
+glGetColorTableParameterfvEXT: procedure(target, pname: GLenum; var params: Single); cdecl;
+glGetColorTableParameterivEXT: procedure(target, pname: GLenum; var params: LongInt); cdecl;
+
+{$ENDIF EXTENSIONS}
+
+// library dependent extensions
+
+{$IFDEF SGI_EXTENSIONS}
+var
+
+// GL_SGIS_multitexture
+glMultiTexCoord1dSGIS: procedure(target: GLenum; s: Double); cdecl;
+glMultiTexCoord1dvSGIS: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord1fSGIS: procedure(target: GLenum; s: Single); cdecl;
+glMultiTexCoord1fvSGIS: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord1iSGIS: procedure(target: GLenum; s: LongInt); cdecl;
+glMultiTexCoord1ivSGIS: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord1sSGIS: procedure(target: GLenum; s: ShortInt); cdecl;
+glMultiTexCoord1svSGIS: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord2dSGIS: procedure(target: GLenum; s, t: Double); cdecl;
+glMultiTexCoord2dvSGIS: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord2fSGIS: procedure(target: GLenum; s, t: Single); cdecl;
+glMultiTexCoord2fvSGIS: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord2iSGIS: procedure(target: GLenum; s, t: LongInt); cdecl;
+glMultiTexCoord2ivSGIS: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord2sSGIS: procedure(target: GLenum; s, t: ShortInt); cdecl;
+glMultiTexCoord2svSGIS: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord3dSGIS: procedure(target: GLenum; s, t, r: Double); cdecl;
+glMultiTexCoord3dvSGIS: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord3fSGIS: procedure(target: GLenum; s, t, r: Single); cdecl;
+glMultiTexCoord3fvSGIS: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord3iSGIS: procedure(target: GLenum; s, t, r: LongInt); cdecl;
+glMultiTexCoord3ivSGIS: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord3sSGIS: procedure(target: GLenum; s, t, r: ShortInt); cdecl;
+glMultiTexCoord3svSGIS: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord4dSGIS: procedure(target: GLenum; s, t, r, q: Double); cdecl;
+glMultiTexCoord4dvSGIS: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord4fSGIS: procedure(target: GLenum; s, t, r, q: Single); cdecl;
+glMultiTexCoord4fvSGIS: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord4iSGIS: procedure(target: GLenum; s, t, r, q: LongInt); cdecl;
+glMultiTexCoord4ivSGIS: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord4sSGIS: procedure(target: GLenum; s, t, r, q: ShortInt); cdecl;
+glMultiTexCoord4svSGIS: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoordPointerSGIS: procedure(target: GLenum; size: LongInt; AType: GLEnum; stride: LongInt; var APointer); cdecl;
+glSelectTextureSGIS: procedure(target: GLenum); cdecl;
+glSelectTextureCoordSetSGIS: procedure(target: GLenum); cdecl;
+
+// GL_EXT_multitexture
+glMultiTexCoord1dEXT: procedure(target: GLenum; s: Double); cdecl;
+glMultiTexCoord1dvEXT: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord1fEXT: procedure(target: GLenum; s: Single); cdecl;
+glMultiTexCoord1fvEXT: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord1iEXT: procedure(target: GLenum; s: LongInt); cdecl;
+glMultiTexCoord1ivEXT: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord1sEXT: procedure(target: GLenum; s: ShortInt); cdecl;
+glMultiTexCoord1svEXT: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord2dEXT: procedure(target: GLenum; s, t: Double); cdecl;
+glMultiTexCoord2dvEXT: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord2fEXT: procedure(target: GLenum; s, t: Single); cdecl;
+glMultiTexCoord2fvEXT: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord2iEXT: procedure(target: GLenum; s, t: LongInt); cdecl;
+glMultiTexCoord2ivEXT: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord2sEXT: procedure(target: GLenum; s, t: ShortInt); cdecl;
+glMultiTexCoord2svEXT: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord3dEXT: procedure(target: GLenum; s, t, r: Double); cdecl;
+glMultiTexCoord3dvEXT: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord3fEXT: procedure(target: GLenum; s, t, r: Single); cdecl;
+glMultiTexCoord3fvEXT: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord3iEXT: procedure(target: GLenum; s, t, r: LongInt); cdecl;
+glMultiTexCoord3ivEXT: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord3sEXT: procedure(target: GLenum; s, t, r: ShortInt); cdecl;
+glMultiTexCoord3svEXT: procedure(target: GLenum; var v: ShortInt); cdecl;
+glMultiTexCoord4dEXT: procedure(target: GLenum; s, t, r, q: Double); cdecl;
+glMultiTexCoord4dvEXT: procedure(target: GLenum; var v: Double); cdecl;
+glMultiTexCoord4fEXT: procedure(target: GLenum; s, t, r, q: Single); cdecl;
+glMultiTexCoord4fvEXT: procedure(target: GLenum; var v: Single); cdecl;
+glMultiTexCoord4iEXT: procedure(target: GLenum; s, t, r, q: LongInt); cdecl;
+glMultiTexCoord4ivEXT: procedure(target: GLenum; var v: LongInt); cdecl;
+glMultiTexCoord4sEXT: procedure(target: GLenum; s, t, r, q: ShortInt); cdecl;
+glMultiTexCoord4svEXT: procedure(target: GLenum; var v: ShortInt); cdecl;
+glInterleavedTextureCoordSetsEXT: procedure(factor: LongInt); cdecl;
+glSelectTextureEXT: procedure(target: GLenum); cdecl;
+glSelectTextureCoordSetEXT: procedure(target: GLenum); cdecl;
+glSelectTextureTransformEXT: procedure(target: GLenum); cdecl;
+
+// GL_EXT_point_parameters
+glPointParameterfEXT: procedure(pname: GLenum; param: Single); cdecl;
+glPointParameterfvEXT: procedure(pname: GLenum; var params: Single); cdecl;
+
+{$ENDIF SGI_EXTENSIONS}
+
+{$ifdef MESA}
+var
+// GL_MESA_window_pos
+glWindowPos2iMESA: procedure(x, y: LongInt); cdecl;
+glWindowPos2sMESA: procedure(x, y: ShortInt); cdecl;
+glWindowPos2fMESA: procedure(x, y: Single); cdecl;
+glWindowPos2dMESA: procedure(x, y: Double); cdecl;
+glWindowPos2ivMESA: procedure(var p: LongInt); cdecl;
+glWindowPos2svMESA: procedure(var p: ShortInt); cdecl;
+glWindowPos2fvMESA: procedure(var p: Single); cdecl;
+glWindowPos2dvMESA: procedure(var p: Double); cdecl;
+glWindowPos3iMESA: procedure(x, y, z: LongInt); cdecl;
+glWindowPos3sMESA: procedure(x, y, z: ShortInt); cdecl;
+glWindowPos3fMESA: procedure(x, y, z: Single); cdecl;
+glWindowPos3dMESA: procedure(x, y, z: Double); cdecl;
+glWindowPos3ivMESA: procedure(var p: LongInt); cdecl;
+glWindowPos3svMESA: procedure(var p: ShortInt); cdecl;
+glWindowPos3fvMESA: procedure(var p: Single); cdecl;
+glWindowPos3dvMESA: procedure(var p: Double); cdecl;
+glWindowPos4iMESA: procedure(x, y, z, w: LongInt); cdecl;
+glWindowPos4sMESA: procedure(x, y, z, w: ShortInt); cdecl;
+glWindowPos4fMESA: procedure(x, y, z, w: Single); cdecl;
+glWindowPos4dMESA: procedure(x, y, z, w: Double); cdecl;
+glWindowPos4ivMESA: procedure(var p: LongInt); cdecl;
+glWindowPos4svMESA: procedure(var p: ShortInt); cdecl;
+glWindowPos4fvMESA: procedure(var p: Single); cdecl;
+glWindowPos4dvMESA: procedure(var p: Double); cdecl;
+
+// GL_MESA_resize_buffers
+glResizeBuffersMESA: procedure; cdecl;
+{$endif MESA}
+
+
+// =======================================================
+// =======================================================
+
+implementation
+
+
+{$LINKLIB m}
+
+function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl';
+function dlclose(handle: Pointer): LongInt; external 'dl';
+function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl';
+
+function LoadLibrary(name: PChar): Pointer;
+begin
+  Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY});
+end;
+
+function GetProc(handle: Pointer; name: PChar): Pointer;
+begin
+  Result := dlsym(handle, name);
+  if (Result = nil) and  GLDumpUnresolvedFunctions then
+    WriteLn('Unresolved: ', name);
+end;
+
+var
+  libGL : Pointer;
+
+function InitGLFromLibrary(libname: PChar): Boolean;
+begin
+  Result := False;
+  libGL := LoadLibrary(libname);
+  if not Assigned(libGL) then exit;
+
+{$ifdef GL1_0}
+// Miscellaneous
+  glClearIndex := GetProc(libgl, 'glClearIndex');
+  glClearColor := GetProc(libgl, 'glClearColor');
+  glClear := GetProc(libgl, 'glClear');
+  glIndexMask := GetProc(libgl, 'glIndexMask');
+  glColorMask := GetProc(libgl, 'glColorMask');
+  glAlphaFunc := GetProc(libgl, 'glAlphaFunc');
+  glBlendFunc := GetProc(libgl, 'glBlendFunc');
+  glLogicOp := GetProc(libgl, 'glLogicOp');
+  glCullFace := GetProc(libgl, 'glCullFace');
+  glFrontFace := GetProc(libgl, 'glFrontFace');
+  glPointSize := GetProc(libgl, 'glPointSize');
+  glLineWidth := GetProc(libgl, 'glLineWidth');
+  glLineStipple := GetProc(libgl, 'glLineStipple');
+  glPolygonMode := GetProc(libgl, 'glPolygonMode');
+  glPolygonOffset := GetProc(libgl, 'glPolygonOffset');
+  glPolygonStipple := GetProc(libgl, 'glPolygonStipple');
+  glGetPolygonStipple := GetProc(libgl, 'glGetPolygonStipple');
+  glEdgeFlag := GetProc(libgl, 'glEdgeFlag');
+  glEdgeFlagv := GetProc(libgl, 'glEdgeFlagv');
+  glScissor := GetProc(libgl, 'glScissor');
+  glClipPlane := GetProc(libgl, 'glClipPlane');
+  glGetClipPlane := GetProc(libgl, 'glGetClipPlane');
+  glDrawBuffer := GetProc(libgl, 'glDrawBuffer');
+  glReadBuffer := GetProc(libgl, 'glReadBuffer');
+  glEnable := GetProc(libgl, 'glEnable');
+  glDisable := GetProc(libgl, 'glDisable');
+  glIsEnabled := GetProc(libgl, 'glIsEnabled');
+  glGetBooleanv := GetProc(libgl, 'glGetBooleanv');
+  glGetDoublev := GetProc(libgl, 'glGetDoublev');
+  glGetFloatv := GetProc(libgl, 'glGetFloatv');
+  glGetIntegerv := GetProc(libgl, 'glGetIntegerv');
+  glPushAttrib := GetProc(libgl, 'glPushAttrib');
+  glPopAttrib := GetProc(libgl, 'glPopAttrib');
+  glRenderMode := GetProc(libgl, 'glRenderMode');
+  glGetError := GetProc(libgl, 'glGetError');
+  glGetString := GetProc(libgl, 'glGetString');
+  glFinish := GetProc(libgl, 'glFinish');
+  glFlush := GetProc(libgl, 'glFlush');
+  glHint := GetProc(libgl, 'glHint');
+// Depth Buffer
+  glClearDepth := GetProc(libgl, 'glClearDepth');
+  glDepthFunc := GetProc(libgl, 'glDepthFunc');
+  glDepthMask := GetProc(libgl, 'glDepthMask');
+  glDepthRange := GetProc(libgl, 'glDepthRange');
+// Accumulation Buffer
+  glClearAccum := GetProc(libgl, 'glClearAccum');
+  glAccum := GetProc(libgl, 'glAccum');
+// Tranformation
+  glMatrixMode := GetProc(libgl, 'glMatrixMode');
+  glOrtho := GetProc(libgl, 'glOrtho');
+  glFrustum := GetProc(libgl, 'glFrustum');
+  glViewport := GetProc(libgl, 'glViewport');
+  glPushMatrix := GetProc(libgl, 'glPushMatrix');
+  glPopMatrix := GetProc(libgl, 'glPopMatrix');
+  glLoadIdentity := GetProc(libgl, 'glLoadIdentity');
+  glLoadMatrixd := GetProc(libgl, 'glLoadMatrixd');
+  glLoadMatrixf := GetProc(libgl, 'glLoadMatrixf');
+  glMultMatrixd := GetProc(libgl, 'glMultMatrixd');
+  glMultMatrixf := GetProc(libgl, 'glMultMatrixf');
+  glRotated := GetProc(libgl, 'glRotated');
+  glRotatef := GetProc(libgl, 'glRotatef');
+  glScaled := GetProc(libgl, 'glScaled');
+  glScalef := GetProc(libgl, 'glScalef');
+  glTranslated := GetProc(libgl, 'glTranslated');
+  glTranslatef := GetProc(libgl, 'glTranslatef');
+// Display Lists
+  glIsList := GetProc(libgl, 'glIsList');
+  glDeleteLists := GetProc(libgl, 'glDeleteLists');
+  glGenLists := GetProc(libgl, 'glGenLists');
+  glNewList := GetProc(libgl, 'glNewList');
+  glEndList := GetProc(libgl, 'glEndList');
+  glCallList := GetProc(libgl, 'glCallList');
+  glCallLists := GetProc(libgl, 'glCallLists');
+  glListBase := GetProc(libgl, 'glListBase');
+// Drawing Functions
+  glBegin := GetProc(libgl, 'glBegin');
+  glEnd := GetProc(libgl, 'glEnd');
+  glVertex2d := GetProc(libgl, 'glVertex2d');
+  glVertex2f := GetProc(libgl, 'glVertex2f');
+  glVertex2i := GetProc(libgl, 'glVertex2i');
+  glVertex2s := GetProc(libgl, 'glVertex2s');
+  glVertex3d := GetProc(libgl, 'glVertex3d');
+  glVertex3f := GetProc(libgl, 'glVertex3f');
+  glVertex3i := GetProc(libgl, 'glVertex3i');
+  glVertex3s := GetProc(libgl, 'glVertex3s');
+  glVertex4d := GetProc(libgl, 'glVertex4d');
+  glVertex4f := GetProc(libgl, 'glVertex4f');
+  glVertex4i := GetProc(libgl, 'glVertex4i');
+  glVertex4s := GetProc(libgl, 'glVertex4s');
+  glVertex2dv := GetProc(libgl, 'glVertex2dv');
+  glVertex2fv := GetProc(libgl, 'glVertex2fv');
+  glVertex2iv := GetProc(libgl, 'glVertex2iv');
+  glVertex2sv := GetProc(libgl, 'glVertex2sv');
+  glVertex3dv := GetProc(libgl, 'glVertex3dv');
+  glVertex3fv := GetProc(libgl, 'glVertex3fv');
+  glVertex3iv := GetProc(libgl, 'glVertex3iv');
+  glVertex3sv := GetProc(libgl, 'glVertex3sv');
+  glVertex4dv := GetProc(libgl, 'glVertex4dv');
+  glVertex4fv := GetProc(libgl, 'glVertex4fv');
+  glVertex4iv := GetProc(libgl, 'glVertex4iv');
+  glVertex4sv := GetProc(libgl, 'glVertex4sv');
+  glNormal3b := GetProc(libgl, 'glNormal3b');
+  glNormal3d := GetProc(libgl, 'glNormal3d');
+  glNormal3f := GetProc(libgl, 'glNormal3f');
+  glNormal3i := GetProc(libgl, 'glNormal3i');
+  glNormal3s := GetProc(libgl, 'glNormal3s');
+  glNormal3bv := GetProc(libgl, 'glNormal3bv');
+  glNormal3dv := GetProc(libgl, 'glNormal3dv');
+  glNormal3fv := GetProc(libgl, 'glNormal3fv');
+  glNormal3iv := GetProc(libgl, 'glNormal3iv');
+  glNormal3sv := GetProc(libgl, 'glNormal3sv');
+  glIndexd := GetProc(libgl, 'glIndexd');
+  glIndexf := GetProc(libgl, 'glIndexf');
+  glIndexi := GetProc(libgl, 'glIndexi');
+  glIndexs := GetProc(libgl, 'glIndexs');
+  glIndexdv := GetProc(libgl, 'glIndexdv');
+  glIndexfv := GetProc(libgl, 'glIndexfv');
+  glIndexiv := GetProc(libgl, 'glIndexiv');
+  glIndexsv := GetProc(libgl, 'glIndexsv');
+  glColor3b := GetProc(libgl, 'glColor3b');
+  glColor3d := GetProc(libgl, 'glColor3d');
+  glColor3f := GetProc(libgl, 'glColor3f');
+  glColor3i := GetProc(libgl, 'glColor3i');
+  glColor3s := GetProc(libgl, 'glColor3s');
+  glColor3ub := GetProc(libgl, 'glColor3ub');
+  glColor3ui := GetProc(libgl, 'glColor3ui');
+  glColor3us := GetProc(libgl, 'glColor3us');
+  glColor4b := GetProc(libgl, 'glColor4b');
+  glColor4d := GetProc(libgl, 'glColor4d');
+  glColor4f := GetProc(libgl, 'glColor4f');
+  glColor4i := GetProc(libgl, 'glColor4i');
+  glColor4s := GetProc(libgl, 'glColor4s');
+  glColor4ub := GetProc(libgl, 'glColor4ub');
+  glColor4ui := GetProc(libgl, 'glColor4ui');
+  glColor4us := GetProc(libgl, 'glColor4us');
+  glColor3bv := GetProc(libgl, 'glColor3bv');
+  glColor3dv := GetProc(libgl, 'glColor3dv');
+  glColor3fv := GetProc(libgl, 'glColor3fv');
+  glColor3iv := GetProc(libgl, 'glColor3iv');
+  glColor3sv := GetProc(libgl, 'glColor3sv');
+  glColor3ubv := GetProc(libgl, 'glColor3ubv');
+  glColor3uiv := GetProc(libgl, 'glColor3uiv');
+  glColor3usv := GetProc(libgl, 'glColor3usv');
+  glColor4bv := GetProc(libgl, 'glColor4bv');
+  glColor4dv := GetProc(libgl, 'glColor4dv');
+  glColor4fv := GetProc(libgl, 'glColor4fv');
+  glColor4iv := GetProc(libgl, 'glColor4iv');
+  glColor4sv := GetProc(libgl, 'glColor4sv');
+  glColor4ubv := GetProc(libgl, 'glColor4ubv');
+  glColor4uiv := GetProc(libgl, 'glColor4uiv');
+  glColor4usv := GetProc(libgl, 'glColor4usv');
+  glTexCoord1d := GetProc(libgl, 'glTexCoord1d');
+  glTexCoord1f := GetProc(libgl, 'glTexCoord1f');
+  glTexCoord1i := GetProc(libgl, 'glTexCoord1i');
+  glTexCoord1s := GetProc(libgl, 'glTexCoord1s');
+  glTexCoord2d := GetProc(libgl, 'glTexCoord2d');
+  glTexCoord2f := GetProc(libgl, 'glTexCoord2f');
+  glTexCoord2i := GetProc(libgl, 'glTexCoord2i');
+  glTexCoord2s := GetProc(libgl, 'glTexCoord2s');
+  glTexCoord3d := GetProc(libgl, 'glTexCoord3d');
+  glTexCoord3f := GetProc(libgl, 'glTexCoord3f');
+  glTexCoord3i := GetProc(libgl, 'glTexCoord3i');
+  glTexCoord3s := GetProc(libgl, 'glTexCoord3s');
+  glTexCoord4d := GetProc(libgl, 'glTexCoord4d');
+  glTexCoord4f := GetProc(libgl, 'glTexCoord4f');
+  glTexCoord4i := GetProc(libgl, 'glTexCoord4i');
+  glTexCoord4s := GetProc(libgl, 'glTexCoord4s');
+  glTexCoord1dv := GetProc(libgl, 'glTexCoord1dv');
+  glTexCoord1fv := GetProc(libgl, 'glTexCoord1fv');
+  glTexCoord1iv := GetProc(libgl, 'glTexCoord1iv');
+  glTexCoord1sv := GetProc(libgl, 'glTexCoord1sv');
+  glTexCoord2dv := GetProc(libgl, 'glTexCoord2dv');
+  glTexCoord2fv := GetProc(libgl, 'glTexCoord2fv');
+  glTexCoord2iv := GetProc(libgl, 'glTexCoord2iv');
+  glTexCoord2sv := GetProc(libgl, 'glTexCoord2sv');
+  glTexCoord3dv := GetProc(libgl, 'glTexCoord3dv');
+  glTexCoord3fv := GetProc(libgl, 'glTexCoord3fv');
+  glTexCoord3iv := GetProc(libgl, 'glTexCoord3iv');
+  glTexCoord3sv := GetProc(libgl, 'glTexCoord3sv');
+  glTexCoord4dv := GetProc(libgl, 'glTexCoord4dv');
+  glTexCoord4fv := GetProc(libgl, 'glTexCoord4fv');
+  glTexCoord4iv := GetProc(libgl, 'glTexCoord4iv');
+  glTexCoord4sv := GetProc(libgl, 'glTexCoord4sv');
+  glRasterPos2d := GetProc(libgl, 'glRasterPos2d');
+  glRasterPos2f := GetProc(libgl, 'glRasterPos2f');
+  glRasterPos2i := GetProc(libgl, 'glRasterPos2i');
+  glRasterPos2s := GetProc(libgl, 'glRasterPos2s');
+  glRasterPos3d := GetProc(libgl, 'glRasterPos3d');
+  glRasterPos3f := GetProc(libgl, 'glRasterPos3f');
+  glRasterPos3i := GetProc(libgl, 'glRasterPos3i');
+  glRasterPos3s := GetProc(libgl, 'glRasterPos3s');
+  glRasterPos4d := GetProc(libgl, 'glRasterPos4d');
+  glRasterPos4f := GetProc(libgl, 'glRasterPos4f');
+  glRasterPos4i := GetProc(libgl, 'glRasterPos4i');
+  glRasterPos4s := GetProc(libgl, 'glRasterPos4s');
+  glRasterPos2dv := GetProc(libgl, 'glRasterPos2dv');
+  glRasterPos2fv := GetProc(libgl, 'glRasterPos2fv');
+  glRasterPos2iv := GetProc(libgl, 'glRasterPos2iv');
+  glRasterPos2sv := GetProc(libgl, 'glRasterPos2sv');
+  glRasterPos3dv := GetProc(libgl, 'glRasterPos3dv');
+  glRasterPos3fv := GetProc(libgl, 'glRasterPos3fv');
+  glRasterPos3iv := GetProc(libgl, 'glRasterPos3iv');
+  glRasterPos3sv := GetProc(libgl, 'glRasterPos3sv');
+  glRasterPos4dv := GetProc(libgl, 'glRasterPos4dv');
+  glRasterPos4fv := GetProc(libgl, 'glRasterPos4fv');
+  glRasterPos4iv := GetProc(libgl, 'glRasterPos4iv');
+  glRasterPos4sv := GetProc(libgl, 'glRasterPos4sv');
+  glRectd := GetProc(libgl, 'glRectd');
+  glRectf := GetProc(libgl, 'glRectf');
+  glRecti := GetProc(libgl, 'glRecti');
+  glRects := GetProc(libgl, 'glRects');
+  glRectdv := GetProc(libgl, 'glRectdv');
+  glRectfv := GetProc(libgl, 'glRectfv');
+  glRectiv := GetProc(libgl, 'glRectiv');
+  glRectsv := GetProc(libgl, 'glRectsv');
+// Lighting
+  glShadeModel := GetProc(libgl, 'glShadeModel');
+  glLightf := GetProc(libgl, 'glLightf');
+  glLighti := GetProc(libgl, 'glLighti');
+  glLightfv := GetProc(libgl, 'glLightfv');
+  glLightiv := GetProc(libgl, 'glLightiv');
+  glGetLightfv := GetProc(libgl, 'glGetLightfv');
+  glGetLightiv := GetProc(libgl, 'glGetLightiv');
+  glLightModelf := GetProc(libgl, 'glLightModelf');
+  glLightModeli := GetProc(libgl, 'glLightModeli');
+  glLightModelfv := GetProc(libgl, 'glLightModelfv');
+  glLightModeliv := GetProc(libgl, 'glLightModeliv');
+  glMaterialf := GetProc(libgl, 'glMaterialf');
+  glMateriali := GetProc(libgl, 'glMateriali');
+  glMaterialfv := GetProc(libgl, 'glMaterialfv');
+  glMaterialiv := GetProc(libgl, 'glMaterialiv');
+  glGetMaterialfv := GetProc(libgl, 'glGetMaterialfv');
+  glGetMaterialiv := GetProc(libgl, 'glGetMaterialiv');
+  glColorMaterial := GetProc(libgl, 'glColorMaterial');
+// Raster Functions
+  glPixelZoom := GetProc(libgl, 'glPixelZoom');
+  glPixelStoref := GetProc(libgl, 'glPixelStoref');
+  glPixelStorei := GetProc(libgl, 'glPixelStorei');
+  glPixelTransferf := GetProc(libgl, 'glPixelTransferf');
+  glPixelTransferi := GetProc(libgl, 'glPixelTransferi');
+  glPixelMapfv := GetProc(libgl, 'glPixelMapfv');
+  glPixelMapuiv := GetProc(libgl, 'glPixelMapuiv');
+  glPixelMapusv := GetProc(libgl, 'glPixelMapusv');
+  glGetPixelMapfv := GetProc(libgl, 'glGetPixelMapfv');
+  glGetPixelMapuiv := GetProc(libgl, 'glGetPixelMapuiv');
+  glGetPixelMapusv := GetProc(libgl, 'glGetPixelMapusv');
+  glBitmap := GetProc(libgl, 'glBitmap');
+  glReadPixels := GetProc(libgl, 'glReadPixels');
+  glDrawPixels := GetProc(libgl, 'glDrawPixels');
+  glCopyPixels := GetProc(libgl, 'glCopyPixels');
+// Stenciling
+  glStencilFunc := GetProc(libgl, 'glStencilFunc');
+  glStencilMask := GetProc(libgl, 'glStencilMask');
+  glStencilOp := GetProc(libgl, 'glStencilOp');
+  glClearStencil := GetProc(libgl, 'glClearStencil');
+// Texture Mapping
+  glTexGend := GetProc(libgl, 'glTexGend');
+  glTexGenf := GetProc(libgl, 'glTexGenf');
+  glTexGeni := GetProc(libgl, 'glTexGeni');
+  glTexGendv := GetProc(libgl, 'glTexGendv');
+  glTexGenfv := GetProc(libgl, 'glTexGenfv');
+  glTexGeniv := GetProc(libgl, 'glTexGeniv');
+  glGetTexGendv := GetProc(libgl, 'glGetTexGendv');
+  glGetTexGenfv := GetProc(libgl, 'glGetTexGenfv');
+  glGetTexGeniv := GetProc(libgl, 'glGetTexGeniv');
+  glTexEnvf := GetProc(libgl, 'glTexEnvf');
+  glTexEnvi := GetProc(libgl, 'glTexEnvi');
+  glTexEnvfv := GetProc(libgl, 'glTexEnvfv');
+  glTexEnviv := GetProc(libgl, 'glTexEnviv');
+  glGetTexEnvfv := GetProc(libgl, 'glGetTexEnvfv');
+  glGetTexEnviv := GetProc(libgl, 'glGetTexEnviv');
+  glTexParameterf := GetProc(libgl, 'glTexParameterf');
+  glTexParameteri := GetProc(libgl, 'glTexParameteri');
+  glTexParameterfv := GetProc(libgl, 'glTexParameterfv');
+  glTexParameteriv := GetProc(libgl, 'glTexParameteriv');
+  glGetTexParameterfv := GetProc(libgl, 'glGetTexParameterfv');
+  glGetTexParameteriv := GetProc(libgl, 'glGetTexParameteriv');
+  glGetTexLevelParameterfv := GetProc(libgl, 'glGetTexLevelParameterfv');
+  glGetTexLevelParameteriv := GetProc(libgl, 'glGetTexLevelParameteriv');
+  glTexImage1D := GetProc(libgl, 'glTexImage1D');
+  glTexImage2D := GetProc(libgl, 'glTexImage2D');
+  glGetTexImage := GetProc(libgl, 'glGetTexImage');
+// Evaluators
+  glMap1d := GetProc(libgl, 'glMap1d');
+  glMap1f := GetProc(libgl, 'glMap1f');
+  glMap2d := GetProc(libgl, 'glMap2d');
+  glMap2f := GetProc(libgl, 'glMap2f');
+  glGetMapdv := GetProc(libgl, 'glGetMapdv');
+  glGetMapfv := GetProc(libgl, 'glGetMapfv');
+  glGetMapiv := GetProc(libgl, 'glGetMapiv');
+  glEvalCoord1d := GetProc(libgl, 'glEvalCoord1d');
+  glEvalCoord1f := GetProc(libgl, 'glEvalCoord1f');
+  glEvalCoord1dv := GetProc(libgl, 'glEvalCoord1dv');
+  glEvalCoord1fv := GetProc(libgl, 'glEvalCoord1fv');
+  glEvalCoord2d := GetProc(libgl, 'glEvalCoord2d');
+  glEvalCoord2f := GetProc(libgl, 'glEvalCoord2f');
+  glEvalCoord2dv := GetProc(libgl, 'glEvalCoord2dv');
+  glEvalCoord2fv := GetProc(libgl, 'glEvalCoord2fv');
+  glMapGrid1d := GetProc(libgl, 'glMapGrid1d');
+  glMapGrid1f := GetProc(libgl, 'glMapGrid1f');
+  glMapGrid2d := GetProc(libgl, 'glMapGrid2d');
+  glMapGrid2f := GetProc(libgl, 'glMapGrid2f');
+  glEvalPoint1 := GetProc(libgl, 'glEvalPoint1');
+  glEvalPoint2 := GetProc(libgl, 'glEvalPoint2');
+  glEvalMesh1 := GetProc(libgl, 'glEvalMesh1');
+  glEvalMesh2 := GetProc(libgl, 'glEvalMesh2');
+// Fog
+  glFogf := GetProc(libgl, 'glFogf');
+  glFogi := GetProc(libgl, 'glFogi');
+  glFogfv := GetProc(libgl, 'glFogfv');
+  glFogiv := GetProc(libgl, 'glFogiv');
+// Selection and Feedback
+  glFeedbackBuffer := GetProc(libgl, 'glFeedbackBuffer');
+  glPassThrough := GetProc(libgl, 'glPassThrough');
+  glSelectBuffer := GetProc(libgl, 'glSelectBuffer');
+  glInitNames := GetProc(libgl, 'glInitNames');
+  glLoadName := GetProc(libgl, 'glLoadName');
+  glPushName := GetProc(libgl, 'glPushName');
+  glPopName := GetProc(libgl, 'glPopName');
+{$endif GL1_0}
+
+{$ifdef GL1_1}
+// Miscellaneous
+  glEnableClientState := GetProc(libgl, 'glEnableClientState');
+  glDisableClientState := GetProc(libgl, 'glDisableClientState');
+  glPushClientAttrib := GetProc(libgl, 'glPushClientAttrib');
+  glPopClientAttrib := GetProc(libgl, 'glPopClientAttrib');
+// Drawing Functions
+  glIndexub := GetProc(libgl, 'glIndexub');
+  glIndexubv := GetProc(libgl, 'glIndexubv');
+// Vertex Arrays
+  glVertexPointer := GetProc(libgl, 'glVertexPointer');
+  glNormalPointer := GetProc(libgl, 'glNormalPointer');
+  glColorPointer := GetProc(libgl, 'glColorPointer');
+  glIndexPointer := GetProc(libgl, 'glIndexPointer');
+  glTexCoordPointer := GetProc(libgl, 'glTexCoordPointer');
+  glEdgeFlagPointer := GetProc(libgl, 'glEdgeFlagPointer');
+  glGetPointerv := GetProc(libgl, 'glGetPointerv');
+  glArrayElement := GetProc(libgl, 'glArrayElement');
+  glDrawArrays := GetProc(libgl, 'glDrawArrays');
+  glDrawElements := GetProc(libgl, 'glDrawElements');
+  glInterleavedArrays := GetProc(libgl, 'glInterleavedArrays');
+// Texture Mapping
+  glGenTextures := GetProc(libgl, 'glGenTextures');
+  glDeleteTextures := GetProc(libgl, 'glDeleteTextures');
+  glBindTexture := GetProc(libgl, 'glBindTexture');
+  glPrioritizeTextures := GetProc(libgl, 'glPrioritizeTextures');
+  glAreTexturesResident := GetProc(libgl, 'glAreTexturesResident');
+  glIsTexture := GetProc(libgl, 'glIsTexture');
+  glTexSubImage1D := GetProc(libgl, 'glTexSubImage1D');
+  glTexSubImage2D := GetProc(libgl, 'glTexSubImage2D');
+  glCopyTexImage1D := GetProc(libgl, 'glCopyTexImage1D');
+  glCopyTexImage2D := GetProc(libgl, 'glCopyTexImage2D');
+  glCopyTexSubImage1D := GetProc(libgl, 'glCopyTexSubImage1D');
+  glCopyTexSubImage2D := GetProc(libgl, 'glCopyTexSubImage2D');
+{$endif GL1_1}
+
+{$ifdef GL1_2}
+  glDrawRangeElements := GetProc(libgl, 'glDrawRangeElements');
+  glTexImage3D := GetProc(libgl, 'glTexImage3D');
+  glTexSubImage3D := GetProc(libgl, 'glTexSubImage3D');
+  glCopyTexSubImage3D := GetProc(libgl, 'glCopyTexSubImage3D');
+{$endif GL1_2}
+
+{$ifdef EXTENSIONS}
+// === 1.0 Extensions ===
+// GL_EXT_blend_minmax
+  glBlendEquationEXT := GetProc(libgl, 'glBlendEquationEXT');
+// GL_EXT_blend_color
+  glBlendColorEXT := GetProc(libgl, 'glBlendColorEXT');
+// GL_EXT_polygon_offset
+  glPolygonOffsetEXT := GetProc(libgl, 'glPolygonOffsetEXT');
+// GL_EXT_vertex_array
+  glVertexPointerEXT := GetProc(libgl, 'glVertexPointerEXT');
+  glNormalPointerEXT := GetProc(libgl, 'glNormalPointerEXT');
+  glColorPointerEXT := GetProc(libgl, 'glColorPointerEXT');
+  glIndexPointerEXT := GetProc(libgl, 'glIndexPointerEXT');
+  glTexCoordPointerEXT := GetProc(libgl, 'glTexCoordPointerEXT');
+  glEdgeFlagPointerEXT := GetProc(libgl, 'glEdgeFlagPointerEXT');
+  glGetPointervEXT := GetProc(libgl, 'glGetPointervEXT');
+  glArrayElementEXT := GetProc(libgl, 'glArrayElementEXT');
+  glDrawArraysEXT := GetProc(libgl, 'glDrawArraysEXT');
+// GL_EXT_texture_object
+  glGenTexturesEXT := GetProc(libgl, 'glGenTexturesEXT');
+  glDeleteTexturesEXT := GetProc(libgl, 'glDeleteTexturesEXT');
+  glBindTextureEXT := GetProc(libgl, 'glBindTextureEXT');
+  glPrioritizeTexturesEXT := GetProc(libgl, 'glPrioritizeTexturesEXT');
+  glAreTexturesResidentEXT := GetProc(libgl, 'glAreTexturesResidentEXT');
+  glIsTextureEXT := GetProc(libgl, 'glIsTextureEXT');
+// GL_EXT_texture3D
+  glTexImage3DEXT := GetProc(libgl, 'glTexImage3DEXT');
+  glTexSubImage3DEXT := GetProc(libgl, 'glTexSubImage3DEXT');
+  glCopyTexSubImage3DEXT := GetProc(libgl, 'glCopyTexSubImage3DEXT');
+// GL_EXT_color_table
+  glColorTableEXT := GetProc(libgl, 'glColorTableEXT');
+  glColorSubTableEXT := GetProc(libgl, 'glColorSubTableEXT');
+  glGetColorTableEXT := GetProc(libgl, 'glGetColorTableEXT');
+  glGetColorTableParameterfvEXT := GetProc(libgl, 'glGetColorTableParameterfvEXT');
+  glGetColorTableParameterivEXT := GetProc(libgl, 'glGetColorTableParameterivEXT');
+{$endif EXTENSIONS}
+
+{$ifdef SGI_EXTENSIONS}
+// GL_SGIS_multitexture
+  glMultiTexCoord1dSGIS := GetProc(libgl, 'glMultiTexCoord1dSGIS');
+  glMultiTexCoord1dvSGIS := GetProc(libgl, 'glMultiTexCoord1dvSGIS');
+  glMultiTexCoord1fSGIS := GetProc(libgl, 'glMultiTexCoord1fSGIS');
+  glMultiTexCoord1fvSGIS := GetProc(libgl, 'glMultiTexCoord1fvSGIS');
+  glMultiTexCoord1iSGIS := GetProc(libgl, 'glMultiTexCoord1iSGIS');
+  glMultiTexCoord1ivSGIS := GetProc(libgl, 'glMultiTexCoord1ivSGIS');
+  glMultiTexCoord1sSGIS := GetProc(libgl, 'glMultiTexCoord1sSGIS');
+  glMultiTexCoord1svSGIS := GetProc(libgl, 'glMultiTexCoord1svSGIS');
+  glMultiTexCoord2dSGIS := GetProc(libgl, 'glMultiTexCoord2dSGIS');
+  glMultiTexCoord2dvSGIS := GetProc(libgl, 'glMultiTexCoord2dvSGIS');
+  glMultiTexCoord2fSGIS := GetProc(libgl, 'glMultiTexCoord2fSGIS');
+  glMultiTexCoord2fvSGIS := GetProc(libgl, 'glMultiTexCoord2fvSGIS');
+  glMultiTexCoord2iSGIS := GetProc(libgl, 'glMultiTexCoord2iSGIS');
+  glMultiTexCoord2ivSGIS := GetProc(libgl, 'glMultiTexCoord2ivSGIS');
+  glMultiTexCoord2sSGIS := GetProc(libgl, 'glMultiTexCoord2sSGIS');
+  glMultiTexCoord2svSGIS := GetProc(libgl, 'glMultiTexCoord2svSGIS');
+  glMultiTexCoord3dSGIS := GetProc(libgl, 'glMultiTexCoord3dSGIS');
+  glMultiTexCoord3dvSGIS := GetProc(libgl, 'glMultiTexCoord3dvSGIS');
+  glMultiTexCoord3fSGIS := GetProc(libgl, 'glMultiTexCoord3fSGIS');
+  glMultiTexCoord3fvSGIS := GetProc(libgl, 'glMultiTexCoord3fvSGIS');
+  glMultiTexCoord3iSGIS := GetProc(libgl, 'glMultiTexCoord3iSGIS');
+  glMultiTexCoord3ivSGIS := GetProc(libgl, 'glMultiTexCoord3ivSGIS');
+  glMultiTexCoord3sSGIS := GetProc(libgl, 'glMultiTexCoord3sSGIS');
+  glMultiTexCoord3svSGIS := GetProc(libgl, 'glMultiTexCoord3svSGIS');
+  glMultiTexCoord4dSGIS := GetProc(libgl, 'glMultiTexCoord4dSGIS');
+  glMultiTexCoord4dvSGIS := GetProc(libgl, 'glMultiTexCoord4dvSGIS');
+  glMultiTexCoord4fSGIS := GetProc(libgl, 'glMultiTexCoord4fSGIS');
+  glMultiTexCoord4fvSGIS := GetProc(libgl, 'glMultiTexCoord4fvSGIS');
+  glMultiTexCoord4iSGIS := GetProc(libgl, 'glMultiTexCoord4iSGIS');
+  glMultiTexCoord4ivSGIS := GetProc(libgl, 'glMultiTexCoord4ivSGIS');
+  glMultiTexCoord4sSGIS := GetProc(libgl, 'glMultiTexCoord4sSGIS');
+  glMultiTexCoord4svSGIS := GetProc(libgl, 'glMultiTexCoord4svSGIS');
+  glMultiTexCoordPointerSGIS := GetProc(libgl, 'glMultiTexCoordPointerSGIS');
+  glSelectTextureSGIS := GetProc(libgl, 'glSelectTextureSGIS');
+  glSelectTextureCoordSetSGIS := GetProc(libgl, 'glSelectTextureCoordSetSGIS');
+// GL_EXT_multitexture
+  glMultiTexCoord1dEXT := GetProc(libgl, 'glMultiTexCoord1dEXT');
+  glMultiTexCoord1dvEXT := GetProc(libgl, 'glMultiTexCoord1dvEXT');
+  glMultiTexCoord1fEXT := GetProc(libgl, 'glMultiTexCoord1fEXT');
+  glMultiTexCoord1fvEXT := GetProc(libgl, 'glMultiTexCoord1fvEXT');
+  glMultiTexCoord1iEXT := GetProc(libgl, 'glMultiTexCoord1iEXT');
+  glMultiTexCoord1ivEXT := GetProc(libgl, 'glMultiTexCoord1ivEXT');
+  glMultiTexCoord1sEXT := GetProc(libgl, 'glMultiTexCoord1sEXT');
+  glMultiTexCoord1svEXT := GetProc(libgl, 'glMultiTexCoord1svEXT');
+  glMultiTexCoord2dEXT := GetProc(libgl, 'glMultiTexCoord2dEXT');
+  glMultiTexCoord2dvEXT := GetProc(libgl, 'glMultiTexCoord2dvEXT');
+  glMultiTexCoord2fEXT := GetProc(libgl, 'glMultiTexCoord2fEXT');
+  glMultiTexCoord2fvEXT := GetProc(libgl, 'glMultiTexCoord2fvEXT');
+  glMultiTexCoord2iEXT := GetProc(libgl, 'glMultiTexCoord2iEXT');
+  glMultiTexCoord2ivEXT := GetProc(libgl, 'glMultiTexCoord2ivEXT');
+  glMultiTexCoord2sEXT := GetProc(libgl, 'glMultiTexCoord2sEXT');
+  glMultiTexCoord2svEXT := GetProc(libgl, 'glMultiTexCoord2svEXT');
+  glMultiTexCoord3dEXT := GetProc(libgl, 'glMultiTexCoord3dEXT');
+  glMultiTexCoord3dvEXT := GetProc(libgl, 'glMultiTexCoord3dvEXT');
+  glMultiTexCoord3fEXT := GetProc(libgl, 'glMultiTexCoord3fEXT');
+  glMultiTexCoord3fvEXT := GetProc(libgl, 'glMultiTexCoord3fvEXT');
+  glMultiTexCoord3iEXT := GetProc(libgl, 'glMultiTexCoord3iEXT');
+  glMultiTexCoord3ivEXT := GetProc(libgl, 'glMultiTexCoord3ivEXT');
+  glMultiTexCoord3sEXT := GetProc(libgl, 'glMultiTexCoord3sEXT');
+  glMultiTexCoord3svEXT := GetProc(libgl, 'glMultiTexCoord3svEXT');
+  glMultiTexCoord4dEXT := GetProc(libgl, 'glMultiTexCoord4dEXT');
+  glMultiTexCoord4dvEXT := GetProc(libgl, 'glMultiTexCoord4dvEXT');
+  glMultiTexCoord4fEXT := GetProc(libgl, 'glMultiTexCoord4fEXT');
+  glMultiTexCoord4fvEXT := GetProc(libgl, 'glMultiTexCoord4fvEXT');
+  glMultiTexCoord4iEXT := GetProc(libgl, 'glMultiTexCoord4iEXT');
+  glMultiTexCoord4ivEXT := GetProc(libgl, 'glMultiTexCoord4ivEXT');
+  glMultiTexCoord4sEXT := GetProc(libgl, 'glMultiTexCoord4sEXT');
+  glMultiTexCoord4svEXT := GetProc(libgl, 'glMultiTexCoord4svEXT');
+  glInterleavedTextureCoordSetsEXT := GetProc(libgl, 'glInterleavedTextureCoordSetsEXT');
+  glSelectTextureEXT := GetProc(libgl, 'glSelectTextureEXT');
+  glSelectTextureCoordSetEXT := GetProc(libgl, 'glSelectTextureCoordSetEXT');
+  glSelectTextureTransformEXT := GetProc(libgl, 'glSelectTextureTransformEXT');
+// GL_EXT_point_parameters
+  glPointParameterfEXT := GetProc(libgl, 'glPointParameterfEXT');
+  glPointParameterfvEXT := GetProc(libgl, 'glPointParameterfvEXT');
+{$endif SGI_EXTENSIONS}
+
+{$ifdef MESA}
+// GL_MESA_window_pos
+  glWindowPos2iMESA := GetProc(libgl, 'glWindowPos2iMESA');
+  glWindowPos2sMESA := GetProc(libgl, 'glWindowPos2sMESA');
+  glWindowPos2fMESA := GetProc(libgl, 'glWindowPos2fMESA');
+  glWindowPos2dMESA := GetProc(libgl, 'glWindowPos2dMESA');
+  glWindowPos2ivMESA := GetProc(libgl, 'glWindowPos2ivMESA');
+  glWindowPos2svMESA := GetProc(libgl, 'glWindowPos2svMESA');
+  glWindowPos2fvMESA := GetProc(libgl, 'glWindowPos2fvMESA');
+  glWindowPos2dvMESA := GetProc(libgl, 'glWindowPos2dvMESA');
+  glWindowPos3iMESA := GetProc(libgl, 'glWindowPos3iMESA');
+  glWindowPos3sMESA := GetProc(libgl, 'glWindowPos3sMESA');
+  glWindowPos3fMESA := GetProc(libgl, 'glWindowPos3fMESA');
+  glWindowPos3dMESA := GetProc(libgl, 'glWindowPos3dMESA');
+  glWindowPos3ivMESA := GetProc(libgl, 'glWindowPos3ivMESA');
+  glWindowPos3svMESA := GetProc(libgl, 'glWindowPos3svMESA');
+  glWindowPos3fvMESA := GetProc(libgl, 'glWindowPos3fvMESA');
+  glWindowPos3dvMESA := GetProc(libgl, 'glWindowPos3dvMESA');
+  glWindowPos4iMESA := GetProc(libgl, 'glWindowPos4iMESA');
+  glWindowPos4sMESA := GetProc(libgl, 'glWindowPos4sMESA');
+  glWindowPos4fMESA := GetProc(libgl, 'glWindowPos4fMESA');
+  glWindowPos4dMESA := GetProc(libgl, 'glWindowPos4dMESA');
+  glWindowPos4ivMESA := GetProc(libgl, 'glWindowPos4ivMESA');
+  glWindowPos4svMESA := GetProc(libgl, 'glWindowPos4svMESA');
+  glWindowPos4fvMESA := GetProc(libgl, 'glWindowPos4fvMESA');
+  glWindowPos4dvMESA := GetProc(libgl, 'glWindowPos4dvMESA');
+// GL_MESA_resize_buffers
+  glResizeBuffersMESA := GetProc(libgl, 'glResizeBuffersMESA');
+{$endif MESA}
+
+  GLInitialized := True;
+  Result := True;
+end;
+
+function InitGL: Boolean;
+begin
+  Result := InitGLFromLibrary('libGL.so') or
+            InitGLFromLibrary('libGL.so.1') or
+            InitGLFromLibrary('libMesaGL.so') or
+            InitGLFromLibrary('libMesaGL.so.3');
+end;
+
+initialization
+  InitGL;
+finalization
+  if Assigned(libGL)  then dlclose(libGL);
+end.
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:39  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.4.2.1  2000/10/01 22:12:27  peter
+    * new demo
+
+  Revision 1.1  2000/07/13 06:34:17  michael
+  + Initial import
+
+  Revision 1.2  2000/05/31 00:34:28  alex
+  made templates work
+
+}
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:39  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.4.2.1  2000/10/01 22:12:27  peter
+    * new demo
+
+}

+ 385 - 0
packages/opengl/unix/glu.pp

@@ -0,0 +1,385 @@
+{
+  $Id$
+
+  Translation of the Mesa GLU headers for FreePascal
+  Copyright (C) 1999 Sebastian Guenther
+
+
+  Mesa 3-D graphics library
+  Version:  3.0
+  Copyright (C) 1995-1998  Brian Paul
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  This library 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
+  Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public
+  License along with this library; if not, write to the Free
+  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+}
+
+{$MODE delphi}  // objfpc would not work because of direct proc var assignments
+
+{You have to enable Macros (compiler switch "-Sm") for compiling this unit!
+ This is necessary for supporting different platforms with different calling
+ conventions via a single unit.}
+
+unit GLU;
+
+interface
+
+{$MACRO ON}
+
+{$IFDEF Linux}
+  uses GL;
+{$ELSE}
+  {$MESSAGE Unsupported platform.}
+{$ENDIF}
+
+
+// =======================================================
+//   Unit specific extensions
+// =======================================================
+
+function InitGLUFromLibrary(libname: PChar): Boolean;
+
+
+// determines automatically which libraries to use:
+function InitGLU: Boolean;
+
+
+var
+  GLUDumpUnresolvedFunctions,
+  GLUInitialized: Boolean;
+
+
+// =======================================================
+//   GLU consts, types and functions
+// =======================================================
+
+const
+  GLU_TRUE                              = GL_TRUE;
+  GLU_FALSE                             = GL_FALSE;
+
+  // Normal vectors
+  GLU_SMOOTH                            = 100000;
+  GLU_FLAT                              = 100001;
+  GLU_NONE                              = 100002;
+
+  // Quadric draw styles
+  GLU_POINT                             = 100010;
+  GLU_LINE                              = 100011;
+  GLU_FILL                              = 100012;
+  GLU_SILHOUETTE                        = 100013;
+
+  // Quadric orientation
+  GLU_OUTSIDE                           = 100020;
+  GLU_INSIDE                            = 100021;
+
+  // Tesselator
+  GLU_BEGIN                             = 100100;
+  GLU_VERTEX                            = 100101;
+  GLU_END                               = 100102;
+  GLU_ERROR                             = 100103;
+  GLU_EDGE_FLAG                         = 100104;
+
+  // Contour types
+  GLU_CW                                = 100120;
+  GLU_CCW                               = 100121;
+  GLU_INTERIOR                          = 100122;
+  GLU_EXTERIOR                          = 100123;
+  GLU_UNKNOWN                           = 100124;
+
+  // Tesselation errors
+  GLU_TESS_ERROR1                       = 100151;  // missing gluEndPolygon
+  GLU_TESS_ERROR2                       = 100152;  // missing gluBeginPolygon
+  GLU_TESS_ERROR3                       = 100153;  // misoriented contour
+  GLU_TESS_ERROR4                       = 100154;  // vertex/edge intersection
+  GLU_TESS_ERROR5                       = 100155;  // misoriented or self-intersecting loops
+  GLU_TESS_ERROR6                       = 100156;  // coincident vertices
+  GLU_TESS_ERROR7                       = 100157;  // all vertices collinear
+  GLU_TESS_ERROR8                       = 100158;  // intersecting edges
+  GLU_TESS_ERROR9                       = 100159;  // not coplanar contours
+
+  // NURBS
+  GLU_AUTO_LOAD_MATRIX                  = 100200;
+  GLU_CULLING                           = 100201;
+  GLU_PARAMETRIC_TOLERANCE              = 100202;
+  GLU_SAMPLING_TOLERANCE                = 100203;
+  GLU_DISPLAY_MODE                      = 100204;
+  GLU_SAMPLING_METHOD                   = 100205;
+  GLU_U_STEP                            = 100206;
+  GLU_V_STEP                            = 100207;
+
+  GLU_PATH_LENGTH                       = 100215;
+  GLU_PARAMETRIC_ERROR                  = 100216;
+  GLU_DOMAIN_DISTANCE                   = 100217;
+
+  GLU_MAP1_TRIM_2                       = 100210;
+  GLU_MAP1_TRIM_3                       = 100211;
+
+  GLU_OUTLINE_POLYGON                   = 100240;
+  GLU_OUTLINE_PATCH                     = 100241;
+
+  GLU_NURBS_ERROR1                      = 100251;   // spline order un-supported
+  GLU_NURBS_ERROR2                      = 100252;   // too few knots
+  GLU_NURBS_ERROR3                      = 100253;   // valid knot range is empty
+  GLU_NURBS_ERROR4                      = 100254;   // decreasing knot sequence
+  GLU_NURBS_ERROR5                      = 100255;   // knot multiplicity > spline order
+  GLU_NURBS_ERROR6                      = 100256;   // endcurve() must follow bgncurve()
+  GLU_NURBS_ERROR7                      = 100257;   // bgncurve() must precede endcurve()
+  GLU_NURBS_ERROR8                      = 100258;   // ctrlarray or knot vector is NULL
+  GLU_NURBS_ERROR9                      = 100259;   // cannot draw pwlcurves
+  GLU_NURBS_ERROR10                     = 100260;   // missing gluNurbsCurve()
+  GLU_NURBS_ERROR11                     = 100261;   // missing gluNurbsSurface()
+  GLU_NURBS_ERROR12                     = 100262;   // endtrim() must precede endsurface()
+  GLU_NURBS_ERROR13                     = 100263;   // bgnsurface() must precede endsurface()
+  GLU_NURBS_ERROR14                     = 100264;   // curve of improper type passed as trim curve
+  GLU_NURBS_ERROR15                     = 100265;   // bgnsurface() must precede bgntrim()
+  GLU_NURBS_ERROR16                     = 100266;   // endtrim() must follow bgntrim()
+  GLU_NURBS_ERROR17                     = 100267;   // bgntrim() must precede endtrim()*/
+  GLU_NURBS_ERROR18                     = 100268;   // invalid or missing trim curve*/
+  GLU_NURBS_ERROR19                     = 100269;   // bgntrim() must precede pwlcurve()
+  GLU_NURBS_ERROR20                     = 100270;   // pwlcurve referenced twice*/
+  GLU_NURBS_ERROR21                     = 100271;   // pwlcurve and nurbscurve mixed
+  GLU_NURBS_ERROR22                     = 100272;   // improper usage of trim data type
+  GLU_NURBS_ERROR23                     = 100273;   // nurbscurve referenced twice
+  GLU_NURBS_ERROR24                     = 100274;   // nurbscurve and pwlcurve mixed
+  GLU_NURBS_ERROR25                     = 100275;   // nurbssurface referenced twice
+  GLU_NURBS_ERROR26                     = 100276;   // invalid property
+  GLU_NURBS_ERROR27                     = 100277;   // endsurface() must follow bgnsurface()
+  GLU_NURBS_ERROR28                     = 100278;   // intersecting or misoriented trim curves
+  GLU_NURBS_ERROR29                     = 100279;   // intersecting trim curves
+  GLU_NURBS_ERROR30                     = 100280;   // UNUSED
+  GLU_NURBS_ERROR31                     = 100281;   // unconnected trim curves
+  GLU_NURBS_ERROR32                     = 100282;   // unknown knot error
+  GLU_NURBS_ERROR33                     = 100283;   // negative vertex count encountered
+  GLU_NURBS_ERROR34                     = 100284;   // negative byte-stride
+  GLU_NURBS_ERROR35                     = 100285;   // unknown type descriptor
+  GLU_NURBS_ERROR36                     = 100286;   // null control point reference
+  GLU_NURBS_ERROR37                     = 100287;   // duplicate point on pwlcurve
+
+  // Errors
+  GLU_INVALID_ENUM                      = 100900;
+  GLU_INVALID_VALUE                     = 100901;
+  GLU_OUT_OF_MEMORY                     = 100902;
+  GLU_INCOMPATIBLE_GL_VERSION           = 100903;
+
+  // New in GLU 1.1
+  GLU_VERSION                           = 100800;
+  GLU_EXTENSIONS                        = 100801;
+
+type
+  PGLUquadricObj = ^TGLUquadricObj;
+  TGLUquadricObj = record end;
+  PGLUtriangulatorObj = ^TGLUtriangulatorObj;
+  TGLUtriangulatorObj = record end;
+  PGLUnurbsObj = ^TGLUnurbsObj;
+  TGLUnurbsObj = record end;
+
+  TGLUQuadricCallback = procedure; cdecl;
+  TGLUNurbsCallback = procedure; cdecl;
+  TGLUTessCallback = procedure; cdecl;
+
+  TGLUViewport = array[0..3] of LongInt;
+  TGLUMatrixd = array[0..15] of Double;
+  TGLUMatrixf = array[0..15] of Single;
+  TGLUVectord = array[0..2] of Double;
+
+
+var
+  // Miscellaneous functions
+  gluLookAt: procedure(eye, eyey, eyez, centerx, centery, centerz, upx, upy, upz: Double); cdecl;
+  gluOrtho2D: procedure(left, right, bottom, top: Double); cdecl;
+  gluPerspective: procedure(fovy, aspect, zNear, zFar: Double); cdecl;
+  gluPickMatrix: procedure(x, y, width, height: Double; const viewport: TGLUViewport); cdecl;
+  gluProject: procedure(objx, objy, objz: Double; const modelMatrix, projMatrix: TGLUMatrixd; const viewport: TGLUViewport; winx, winy, winz: Double); cdecl;
+  gluUnProject: procedure(winx, winy, winz: Double; const modelMatrix, projMatrix: TGLUMatrixd; const viewport: TGLUViewport; objx, objy, objz: Double); cdecl;
+  gluErrorString: procedure(errorCode: GLenum); cdecl;
+
+  // Mipmapping and image scaling
+  gluScaleImage: procedure(format: GLenum; within, heightin: LongInt; typein: GLenum; var datain; widthout, heightout: LongInt; typeout: GLenum; var dataout); cdecl;
+  gluBuild1DMipmaps: procedure(target: GLenum; components, width: LongInt; format, AType: GLEnum; var data); cdecl;
+  gluBuild2DMipmaps: procedure(target: GLenum; components, width, height: LongInt; format, AType: GLEnum; var data); cdecl;
+
+  // Quadrics
+  gluNewQuadric: function: PGLUquadricObj; cdecl;
+  gluDeleteQuadric: procedure(state: PGLUquadricObj); cdecl;
+  gluQuadricDrawStyle: procedure(quadObject: PGLUquadricObj; drawStyle: GLenum); cdecl;
+  gluQuadricOrientation: procedure(quadObject: PGLUquadricObj; orientation: GLenum); cdecl;
+  gluQuadricNormals: procedure(quadObject: PGLUquadricObj; normals: GLenum); cdecl;
+  gluQuadricTexture: procedure(quadObject: PGLUquadricObj; textureCoords: Boolean); cdecl;
+  gluQuadricCallback: procedure(quadObject: PGLUquadricObj; which: GLenum; fn: TGLUQuadricCallback); cdecl;
+  gluCylinder: procedure(qobj: PGLUquadricObj; baseRadius, topRadius, height: Double; slices, stacks: LongInt); cdecl;
+  gluSphere: procedure(qobj: PGLUquadricObj; radius: Double; slices, stacks: LongInt); cdecl;
+  gluDisk: procedure(qobj: PGLUquadricObj; innerRadius, outerRadius: Double; slices, loops: LongInt); cdecl;
+  gluPartialDisk: procedure(qobj: PGLUquadricObj; innerRadius, outerRadius: Double; slices, loops: LongInt; startAngle, sweepAngle: Double); cdecl;
+
+  // Nurbs
+  gluNewNurbsRenderer: function: PGLUnurbsObj; cdecl;
+  gluDeleteNurbsRenderer: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluLoadSamplingMatrices: procedure(nobj: PGLUnurbsObj; const modelMatrix, projMatrix: TGLUMatrixf; const viewport: TGLUViewport); cdecl;
+  gluNurbsProperty: procedure(nobj: PGLUnurbsObj; AProperty: GLenum; value: Single); cdecl;
+  gluGetNurbsProperty: procedure(nobj: PGLUnurbsObj; AProperty: GLEnum; var value: Single); cdecl;
+  gluBeginCurve: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluEndCurve: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluNurbsCurve: procedure(nobj: PGLUnurbsObj; nknots: LongInt; var know: Single; stride: LongInt; var ctlarray: Single; order: LongInt; AType: GLenum); cdecl;
+  gluBeginSurface: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluEndSurface: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluNurbsSurface: procedure(nobj: PGLUnurbsObj; sknot_count: LongInt; var sknot: Single; tknot_count: LongInt; var tknot: Single; s_stride, t_stride: LongInt; var ctlarray: Single; sorder, torder: LongInt; AType: GLenum); cdecl;
+  gluBeginTrim: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluEndTrim: procedure(nobj: PGLUnurbsObj); cdecl;
+  gluPwlCurve: procedure(nobj: PGLUnurbsObj; count: LongInt; var AArray: Single; stride: LongInt; AType: GLenum); cdecl;
+  gluNurbsCallback: procedure(nobj: PGLUnurbsObj; which: GLenum; fn: TGLUNurbsCallback); cdecl;
+
+  // Polygon tesselation
+  gluNewTess: function: PGLUtriangulatorObj; cdecl;
+  gluTessCallback: procedure(tobj: PGLUtriangulatorObj; which: GLenum; fn: TGLUTessCallback); cdecl;
+
+  gluDeleteTess: procedure(tobj: PGLUtriangulatorObj); cdecl;
+  gluBeginPolygon: procedure(tobj: PGLUtriangulatorObj); cdecl;
+  gluEndPolygon: procedure(tobj: PGLUtriangulatorObj); cdecl;
+  gluNextContour: procedure(tobj: PGLUtriangulatorObj; AType: GLenum); cdecl;
+  gluTessVertex: procedure(tobj: PGLUtriangulatorObj; v: TGLUVectord; var data); cdecl;
+
+  // New functions in GLU 1.1
+  gluGetString: function(name: GLenum): PChar; cdecl;
+
+
+// =======================================================
+//
+// =======================================================
+
+implementation
+
+{$LINKLIB m}
+
+function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl';
+function dlclose(handle: Pointer): LongInt; external 'dl';
+function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl';
+
+function LoadLibrary(name: PChar): Pointer;
+begin
+  Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY});
+end;
+
+function GetProc(handle: Pointer; name: PChar): Pointer;
+begin
+  Result := dlsym(handle, name);
+  if (Result = nil) and GLUDumpUnresolvedFunctions then
+    WriteLn('Unresolved: ', name);
+end;
+
+var
+  libGLU : Pointer;
+
+function InitGLUFromLibrary(libname: PChar): Boolean;
+begin
+  Result := False;
+  libGLU := LoadLibrary(libname);
+  if not Assigned(libGLU) then exit;
+
+  // Miscellaneous functions
+  gluLookAt := GetProc(libglu, 'gluLookAt');
+  gluOrtho2D := GetProc(libglu, 'gluOrtho2D');
+  gluPerspective := GetProc(libglu, 'gluPerspective');
+  gluPickMatrix := GetProc(libglu, 'gluPickMatrix');
+  gluProject := GetProc(libglu, 'gluProject');
+  gluUnProject := GetProc(libglu, 'gluUnProject');
+  gluErrorString := GetProc(libglu, 'gluErrorString');
+  // Mipmapping and image scaling
+  gluScaleImage := GetProc(libglu, 'gluScaleImage');
+  gluBuild1DMipmaps := GetProc(libglu, 'gluBuild1DMipmaps');
+  gluBuild2DMipmaps := GetProc(libglu, 'gluBuild2DMipmaps');
+  // Quadrics
+  gluNewQuadric := GetProc(libglu, 'gluNewQuadric');
+  gluDeleteQuadric := GetProc(libglu, 'gluDeleteQuadric');
+  gluQuadricDrawStyle := GetProc(libglu, 'gluQuadricDrawStyle');
+  gluQuadricOrientation := GetProc(libglu, 'gluQuadricOrientation');
+  gluQuadricNormals := GetProc(libglu, 'gluQuadricNormals');
+  gluQuadricTexture := GetProc(libglu, 'gluQuadricTexture');
+  gluQuadricCallback := GetProc(libglu, 'gluQuadricCallback');
+  gluCylinder := GetProc(libglu, 'gluCylinder');
+  gluSphere := GetProc(libglu, 'gluSphere');
+  gluDisk := GetProc(libglu, 'gluDisk');
+  gluPartialDisk := GetProc(libglu, 'gluPartialDisk');
+  // Nurbs
+  gluNewNurbsRenderer := GetProc(libglu, 'gluNewNurbsRenderer');
+  gluDeleteNurbsRenderer := GetProc(libglu, 'gluDeleteNurbsRenderer');
+  gluLoadSamplingMatrices := GetProc(libglu, 'gluLoadSamplingMatrices');
+  gluNurbsProperty := GetProc(libglu, 'gluNurbsProperty');
+  gluGetNurbsProperty := GetProc(libglu, 'gluGetNurbsProperty');
+  gluBeginCurve := GetProc(libglu, 'gluBeginCurve');
+  gluEndCurve := GetProc(libglu, 'gluEndCurve');
+  gluNurbsCurve := GetProc(libglu, 'gluNurbsCurve');
+  gluBeginSurface := GetProc(libglu, 'gluBeginSurface');
+  gluEndSurface := GetProc(libglu, 'gluEndSurface');
+  gluNurbsSurface := GetProc(libglu, 'gluNurbsSurface');
+  gluBeginTrim := GetProc(libglu, 'gluBeginTrim');
+  gluEndTrim := GetProc(libglu, 'gluEndTrim');
+  gluPwlCurve := GetProc(libglu, 'gluPwlCurve');
+  gluNurbsCallback := GetProc(libglu, 'gluNurbsCallback');
+  // Polygon tesselation
+  gluNewTess := GetProc(libglu, 'gluNewTess');
+  gluTessCallback := GetProc(libglu, 'gluTessCallback');
+  gluDeleteTess := GetProc(libglu, 'gluDeleteTess');
+  gluBeginPolygon := GetProc(libglu, 'gluBeginPolygon');
+  gluEndPolygon := GetProc(libglu, 'gluEndPolygon');
+  gluNextContour := GetProc(libglu, 'gluNextContour');
+  gluTessVertex := GetProc(libglu, 'gluTessVertex');
+  // New functions in GLU 1.1
+  gluGetString := GetProc(libglu, 'gluGetString');
+
+  GLUInitialized := True;
+  Result := True;
+end;
+
+
+function InitGLU: Boolean;
+begin
+  Result := InitGLUFromLibrary('libGLU.so') or
+            InitGLUFromLibrary('libGLU.so.1') or
+            InitGLUFromLibrary('libMesaGLU.so') or
+            InitGLUFromLibrary('libMesaGLU.so.3');
+end;
+
+
+initialization
+  InitGlU;
+finalization
+  if Assigned(libGLU) then dlclose(libGLU);
+end.
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:40  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.1.2.1  2000/10/01 22:12:28  peter
+    * new demo
+
+  Revision 1.1  2000/07/13 06:34:18  michael
+  + Initial import
+
+  Revision 1.1  2000/05/31 00:35:14  alex
+  added working templates
+
+}
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:40  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.1.2.1  2000/10/01 22:12:28  peter
+    * new demo
+
+}

+ 460 - 0
packages/opengl/unix/glut.pp

@@ -0,0 +1,460 @@
+{
+  $Id$
+
+  Translation of the Mesa GLUT headers for FreePascal
+  Linux Version, Copyright (C) 1999 Sebastian Guenther
+
+
+  Mesa 3-D graphics library
+  Version:  3.0
+  Copyright (C) 1995-1998  Brian Paul
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  This library 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
+  Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public
+  License along with this library; if not, write to the Free
+  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+}
+
+{$MODE delphi}
+
+unit GLUT;
+
+interface
+
+{$MACRO ON}
+
+{$IFDEF Linux}
+  {$DEFINE gldecl := cdecl;}
+  {$DEFINE extdecl := cdecl;}
+  uses GL;
+{$ELSE}
+  {$MESSAGE Unsupported platform.}
+{$ENDIF}
+
+
+function InitGLUTFromLibrary(libname: PChar): Boolean;
+
+// determines automatically which library to use:
+function InitGLUT: Boolean;
+
+
+var
+  GLUTDumpUnresolvedFunctions,
+  GLUTInitialized: Boolean;
+
+
+const
+  // Display mode bit masks
+  GLUT_RGB                      = 0;
+  GLUT_RGBA                     = GLUT_RGB;
+  GLUT_INDEX                    = 1;
+  GLUT_SINGLE                   = 0;
+  GLUT_DOUBLE                   = 2;
+  GLUT_ACCUM                    = 4;
+  GLUT_ALPHA                    = 8;
+  GLUT_DEPTH                    = 16;
+  GLUT_STENCIL                  = 32;
+  GLUT_MULTISAMPLE              = 128;
+  GLUT_STEREO                   = 256;
+  GLUT_LUMINANCE                = 512;
+
+  // Mouse buttons
+  GLUT_LEFT_BUTTON              = 0;
+  GLUT_MIDDLE_BUTTON            = 1;
+  GLUT_RIGHT_BUTTON             = 2;
+
+  // Mouse button state
+  GLUT_DOWN                     = 0;
+  GLUT_UP                       = 1;
+
+  // Keys ###
+
+  // Enter / exit state
+  GLUT_LEFT                     = 0;
+  GLUT_ENTERED                  = 1;
+
+  // Menu usage state
+  GLUT_MENU_NOT_IN_USE          = 0;
+  GLUT_MENU_IN_USE              = 1;
+
+  // Visibility state
+  GLUT_NOT_VISIBLE              = 0;
+  GLUT_VISIBLE                  = 1;
+
+  // Window status state
+  GLUT_HIDDEN                   = 0;
+  GLUT_FULLY_RETAINED           = 1;
+  GLUT_PARTIALLY_RETAINED       = 2;
+  GLUT_FULLY_COVERED            = 3;
+
+  // Color index component selection values
+  GLUT_RED                      = 0;
+  GLUT_GREEN                    = 1;
+  GLUT_BLUE                     = 2;
+
+  // Layers for use
+  GLUT_NORMAL                   = 0;
+  GLUT_OVERLAY                  = 1;
+
+  // Bitmap stuff###
+
+
+  // glutGet parameters
+  GLUT_WINDOW_X                 = 100;
+  GLUT_WINDOW_Y                 = 101;
+  GLUT_WINDOW_WIDTH             = 102;
+  GLUT_WINDOW_HEIGHT            = 103;
+  GLUT_WINDOW_BUFFER_SIZE       = 104;
+  GLUT_WINDOW_STENCIL_SIZE      = 105;
+  GLUT_WINDOW_DEPTH_SIZE        = 106;
+  GLUT_WINDOW_RED_SIZE          = 107;
+  GLUT_WINDOW_GREEN_SIZE        = 108;
+  GLUT_WINDOW_BLUE_SIZE         = 109;
+  GLUT_WINDOW_ALPHA_SIZE        = 110;
+  GLUT_WINDOW_ACCUM_RED_SIZE    = 111;
+  GLUT_WINDOW_ACCUM_GREEN_SIZE  = 112;
+  GLUT_WINDOW_ACCUM_BLUE_SIZE   = 113;
+  GLUT_WINDOW_ACCUM_ALPHA_SIZE  = 114;
+  GLUT_WINDOW_DOUBLEBUFFER      = 115;
+  GLUT_WINDOW_RGBA              = 116;
+  GLUT_WINDOW_PARENT            = 117;
+  GLUT_WINDOW_NUM_CHILDREN      = 118;
+  GLUT_WINDOW_COLORMAP_SIZE     = 119;
+  GLUT_WINDOW_NUM_SAMPLES       = 120;
+  GLUT_WINDOW_STEREO            = 121;
+  GLUT_WINDOW_CURSOR            = 122;
+  GLUT_SCREEN_WIDTH             = 200;
+  GLUT_SCREEN_HEIGHT            = 201;
+  GLUT_SCREEN_WIDTH_MM          = 202;
+  GLUT_SCREEN_HEIGHT_MM         = 203;
+  GLUT_MENU_NUM_ITEMS           = 300;
+  GLUT_DISPLAY_MODE_POSSIBLE    = 400;
+  GLUT_INIT_WINDOW_X            = 500;
+  GLUT_INIT_WINDOW_Y            = 501;
+  GLUT_INIT_WINDOW_WIDTH        = 502;
+  GLUT_INIT_WINDOW_HEIGHT       = 503;
+  GLUT_INIT_DISPLAY_MODE        = 504;
+  GLUT_ELAPSED_TIME             = 700;
+  GLUT_WINDOW_FORMAT_ID         = 123;
+
+  // glutDeviceGet parameters
+  GLUT_HAS_KEYBOARD             = 600;
+  GLUT_HAS_MOUSE                = 601;
+  GLUT_HAS_SPACEBALL            = 602;
+  GLUT_HAS_DIAL_AND_BUTTON_BOX  = 603;
+  GLUT_HAS_TABLET               = 604;
+  GLUT_NUM_MOUSE_BUTTONS        = 605;
+  GLUT_NUM_SPACEBALL_BUTTONS    = 606;
+  GLUT_NUM_BUTTON_BOX_BUTTONS   = 607;
+  GLUT_NUM_DIALS                = 608;
+  GLUT_NUM_TABLET_BUTTONS       = 609;
+  GLUT_DEVICE_IGNORE_KEY_REPEAT = 610;
+  GLUT_DEVICE_KEY_REPEAT        = 611;
+  GLUT_HAS_JOYSTICK             = 612;
+  GLUT_OWNS_JOYSTICK            = 613;
+  GLUT_JOYSTICK_BUTTONS         = 614;
+  GLUT_JOYSTICK_AXES            = 615;
+  GLUT_JOYSTICK_POLL_RATE       = 616;
+
+  // glutLayerGet parameters
+  GLUT_OVERLAY_POSSIBLE         = 800;
+  GLUT_LAYER_IN_USE             = 801;
+  GLUT_HAS_OVERLAY              = 802;
+  GLUT_TRANSPARENT_INDEX        = 803;
+  GLUT_NORMAL_DAMAGED           = 804;
+  GLUT_OVERLAY_DAMAGED          = 805;
+
+  // glutVideoResizeGet parameters
+  GLUT_VIDEO_RESIZE_POSSIBLE    = 900;
+  GLUT_VIDEO_RESIZE_IN_USE      = 901;
+  GLUT_VIDEO_RESIZE_X_DELTA     = 902;
+  GLUT_VIDEO_RESIZE_Y_DELTA     = 903;
+  GLUT_VIDEO_RESIZE_WIDTH_DELTA = 904;
+  GLUT_VIDEO_RESIZE_HEIGHT_DELTA= 905;
+  GLUT_VIDEO_RESIZE_X           = 906;
+  GLUT_VIDEO_RESIZE_Y           = 907;
+  GLUT_VIDEO_RESIZE_WIDTH       = 908;
+  GLUT_VIDEO_RESIZE_HEIGHT      = 909;
+
+  // glutGetModifiers return mask
+  GLUT_ACTIVE_SHIFT             = 1;
+  GLUT_ACTIVE_CTRL              = 2;
+  GLUT_ACTIVE_ALT               = 4;
+
+  // Cursor stuff ###
+
+// GLUT window callback sub-API
+type
+  TGlutDisplayFunc = procedure; extdecl
+  TGlutReshapeFunc = procedure(width, height: Integer); extdecl
+  TGlutTimerFunc = procedure(value: Integer); extdecl
+  TGlutKeyboardFunc = procedure(key: char;x,y:Integer); extdecl
+  TGlutIdleFunc = procedure; extdecl
+  TGlutVisibilityFunc = procedure(state:Integer); extdecl
+
+// GLUT game mode sub-API
+{$ifdef GLUT_GAME}
+// glutGameModeGet
+const
+  GLUT_GAME_MODE_ACTIVE         = 0;
+  GLUT_GAME_MODE_POSSIBLE       = 1;
+  GLUT_GAME_MODE_WIDTH          = 2;
+  GLUT_GAME_MODE_HEIGHT         = 3;
+  GLUT_GAME_MODE_PIXEL_DEPTH    = 4;
+  GLUT_GAME_MODE_REFRESH_RATE   = 5;
+  GLUT_GAME_MODE_DISPLAY_CHANGED= 6;
+{$endif GLUT_GAME}
+
+var
+// GLUT initialization sub-API
+  glutInit: procedure(argcp: PInteger; argv: PPChar); cdecl;
+  glutInitDisplayMode: procedure(mode: LongWord); cdecl;
+  glutInitDisplayString: procedure(AString: PChar); cdecl;
+  glutInitWindowPosition: procedure(x, y: Integer); cdecl;
+  glutInitWindowSize: procedure(width, height: Integer); cdecl;
+  glutMainLoop: procedure; cdecl;
+
+// GLUT window sub-API
+  glutCreateWindow: function(title: PChar): Integer; cdecl;
+  glutCreateSubWindow: function(win, x, y, width, height: Integer): Integer; cdecl;
+  glutDestroyWindow: procedure(win: Integer); cdecl;
+  glutPostRedisplay: procedure; cdecl;
+  glutPostWindowRedisplay: procedure(win: Integer); cdecl;
+  glutSwapBuffers: procedure; cdecl;
+  glutGetWindow: function: Integer; cdecl;
+  glutSetWindow: procedure(win: Integer); cdecl;
+  glutSetWindowTitle: procedure(title: PChar); cdecl;
+  glutSetIconTitle: procedure(title: PChar); cdecl;
+  glutPositionWindow: procedure(x, y: Integer); cdecl;
+  glutReshapeWindow: procedure(width, height: Integer); cdecl;
+  glutPopWindow: procedure; cdecl;
+  glutPushWindow: procedure; cdecl;
+  glutIconifyWindow: procedure; cdecl;
+  glutShowWindow: procedure; cdecl;
+  glutHideWindow: procedure; cdecl;
+  glutFullScreen: procedure; cdecl;
+  glutSetCursor: procedure(cursor: Integer); cdecl;
+  glutWarpPointer: procedure(x, y: Integer); cdecl;
+
+//overlays ###
+
+//menus ###
+
+// GLUT window callback sub-API
+  glutDisplayFunc: procedure(func: TGlutDisplayFunc); cdecl;
+  glutReshapeFunc: procedure(func: TGlutReshapeFunc); cdecl;
+
+  glutTimerFunc: procedure(millis: LongWord; func: TGlutTimerFunc; value: longint); cdecl;
+  glutKeyboardFunc : procedure(func: TGlutKeyboardFunc); cdecl;
+  glutIdleFunc : procedure(func: TGlutIdleFunc); cdecl;
+  glutVisibilityFunc : procedure(func: TGlutVisibilityFunc); cdecl;
+
+// GLUTAPI void APIENTRY glutDisplayFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutReshapeFunc(void (GLUTCALLBACK * func)(int width, int height));
+// GLUTAPI void APIENTRY glutKeyboardFunc(void (GLUTCALLBACK * func)(unsigned char key, int x, int y));
+// GLUTAPI void APIENTRY glutMouseFunc(void (GLUTCALLBACK * func)(int button, int state, int x, int y));
+// GLUTAPI void APIENTRY glutMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutPassiveMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutEntryFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutVisibilityFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutIdleFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutTimerFunc(unsigned int millis, void (GLUTCALLBACK * func)(int value), int value);
+// GLUTAPI void APIENTRY glutMenuStateFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutSpecialFunc(void (GLUTCALLBACK * func)(int key, int x, int y));
+// GLUTAPI void APIENTRY glutSpaceballMotionFunc(void (GLUTCALLBACK * func)(int x, int y, int z));
+// GLUTAPI void APIENTRY glutSpaceballRotateFunc(void (GLUTCALLBACK * func)(int x, int y, int z));
+// GLUTAPI void APIENTRY glutSpaceballButtonFunc(void (GLUTCALLBACK * func)(int button, int state));
+// GLUTAPI void APIENTRY glutButtonBoxFunc(void (GLUTCALLBACK * func)(int button, int state));
+// GLUTAPI void APIENTRY glutDialsFunc(void (GLUTCALLBACK * func)(int dial, int value));
+// GLUTAPI void APIENTRY glutTabletMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutTabletButtonFunc(void (GLUTCALLBACK * func)(int button, int state, int x, int y));
+// GLUTAPI void APIENTRY glutMenuStatusFunc(void (GLUTCALLBACK * func)(int status, int x, int y));
+// GLUTAPI void APIENTRY glutOverlayDisplayFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutWindowStatusFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutKeyboardUpFunc(void (GLUTCALLBACK * func)(unsigned char key, int x, int y));
+// GLUTAPI void APIENTRY glutSpecialUpFunc(void (GLUTCALLBACK * func)(int key, int x, int y));
+// GLUTAPI void APIENTRY glutJoystickFunc(void (GLUTCALLBACK * func)(unsigned int buttonMask, int x, int y, int z), int pollInterval)
+
+// GLUT color index sub-API
+  glutSetColor: procedure(index: Integer; red, green, blue: Single); cdecl;
+  glutGetColor: function(ndx, component: Integer): Single; cdecl;
+  glutCopyColormap: procedure(win: Integer); cdecl;
+
+// GLUT state retrieval sub-API
+  glutGet: function(AType: GLEnum): Integer; cdecl;
+  glutDeviceGet: function(AType: GLEnum): Integer; cdecl;
+  glutExtensionSupported: function(name: PChar): Integer; cdecl;
+  glutGetModifiers: function: Integer; cdecl;
+  glutLayerGet: function(AType: GLEnum): Integer; cdecl;
+
+// fonts ###
+
+// pre-built models ###
+
+// video resize ###
+
+// debugging ###
+
+// device control ###
+
+
+// GLUT game mode sub-API
+{$ifdef GLUT_GAME}
+  glutGameModeString: procedure(AString: PChar); cdecl;
+  glutEnterGameMode: function: Integer; cdecl;
+  glutLeaveGameMode: procedure; cdecl;
+  glutGameModeGet: function(mode: GLEnum): Integer; cdecl;
+{$endif GLUT_GAME}
+
+
+implementation
+
+{$LINKLIB Xmu}
+
+function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl';
+function dlclose(handle: Pointer): LongInt; external 'dl';
+function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl';
+
+function LoadLibrary(name: PChar): Pointer;
+begin
+  Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY});
+end;
+
+function GetProc(handle: Pointer; name: PChar): Pointer;
+begin
+  Result := dlsym(handle, name);
+  if (Result = nil) and GLUTDumpUnresolvedFunctions then
+    WriteLn('Unresolved: ', name);
+end;
+
+var
+  libGLUT: Pointer;
+
+function InitGLUTFromLibrary(libname: PChar): Boolean;
+begin
+  Result := False;
+  libGLUT := LoadLibrary(libname);
+  if not Assigned(libGLUT) then exit;
+
+// GLUT initialization sub-API
+  glutInit := GetProc(libglut, 'glutInit');
+  glutInitDisplayMode := GetProc(libglut, 'glutInitDisplayMode');
+  glutInitDisplayString := GetProc(libglut, 'glutInitDisplayString');
+  glutInitWindowPosition := GetProc(libglut, 'glutInitWindowPosition');
+  glutInitWindowSize := GetProc(libglut, 'glutInitWindowSize');
+  glutMainLoop := GetProc(libglut, 'glutMainLoop');
+// GLUT window sub-API
+  glutCreateWindow := GetProc(libglut, 'glutCreateWindow');
+  glutCreateSubWindow := GetProc(libglut, 'glutCreateSubWindow');
+  glutDestroyWindow := GetProc(libglut, 'glutDestroyWindow');
+  glutPostRedisplay := GetProc(libglut, 'glutPostRedisplay');
+  glutPostWindowRedisplay := GetProc(libglut, 'glutPostWindowRedisplay');
+  glutSwapBuffers := GetProc(libglut, 'glutSwapBuffers');
+  glutGetWindow := GetProc(libglut, 'glutGetWindow');
+  glutSetWindow := GetProc(libglut, 'glutSetWindow');
+  glutSetWindowTitle := GetProc(libglut, 'glutSetWindowTitle');
+  glutSetIconTitle := GetProc(libglut, 'glutSetIconTitle');
+  glutPositionWindow := GetProc(libglut, 'glutPositionWindow');
+  glutReshapeWindow := GetProc(libglut, 'glutReshapeWindow');
+  glutPopWindow := GetProc(libglut, 'glutPopWindow');
+  glutPushWindow := GetProc(libglut, 'glutPushWindow');
+  glutIconifyWindow := GetProc(libglut, 'glutIconifyWindow');
+  glutShowWindow := GetProc(libglut, 'glutShowWindow');
+  glutHideWindow := GetProc(libglut, 'glutHideWindow');
+  glutFullScreen := GetProc(libglut, 'glutFullScreen');
+  glutSetCursor := GetProc(libglut, 'glutSetCursor');
+  glutWarpPointer := GetProc(libglut, 'glutWarpPointer');
+//overlays ###
+//menus ###
+// GLUT window callback sub-API
+  glutDisplayFunc := GetProc(libglut, 'glutDisplayFunc');
+  glutReshapeFunc := GetProc(libglut, 'glutReshapeFunc');
+  glutTimerFunc := GetProc(libglut, 'glutTimerFunc');
+  glutKeyboardFunc := GetProc(libglut, 'glutKeyboardFunc');
+  glutIdleFunc := GetProc(libglut, 'glutIdleFunc');
+  glutVisibilityFunc := GetProc(libglut, 'glutVisibilityFunc');
+// GLUTAPI void APIENTRY glutDisplayFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutReshapeFunc(void (GLUTCALLBACK * func)(int width, int height));
+// GLUTAPI void APIENTRY glutKeyboardFunc(void (GLUTCALLBACK * func)(unsigned char key, int x, int y));
+// GLUTAPI void APIENTRY glutMouseFunc(void (GLUTCALLBACK * func)(int button, int state, int x, int y));
+// GLUTAPI void APIENTRY glutMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutPassiveMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutEntryFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutVisibilityFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutIdleFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutTimerFunc(unsigned int millis, void (GLUTCALLBACK * func)(int value), int value);
+// GLUTAPI void APIENTRY glutMenuStateFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutSpecialFunc(void (GLUTCALLBACK * func)(int key, int x, int y));
+// GLUTAPI void APIENTRY glutSpaceballMotionFunc(void (GLUTCALLBACK * func)(int x, int y, int z));
+// GLUTAPI void APIENTRY glutSpaceballRotateFunc(void (GLUTCALLBACK * func)(int x, int y, int z));
+// GLUTAPI void APIENTRY glutSpaceballButtonFunc(void (GLUTCALLBACK * func)(int button, int state));
+// GLUTAPI void APIENTRY glutButtonBoxFunc(void (GLUTCALLBACK * func)(int button, int state));
+// GLUTAPI void APIENTRY glutDialsFunc(void (GLUTCALLBACK * func)(int dial, int value));
+// GLUTAPI void APIENTRY glutTabletMotionFunc(void (GLUTCALLBACK * func)(int x, int y));
+// GLUTAPI void APIENTRY glutTabletButtonFunc(void (GLUTCALLBACK * func)(int button, int state, int x, int y));
+// GLUTAPI void APIENTRY glutMenuStatusFunc(void (GLUTCALLBACK * func)(int status, int x, int y));
+// GLUTAPI void APIENTRY glutOverlayDisplayFunc(void (GLUTCALLBACK * func)(void));
+// GLUTAPI void APIENTRY glutWindowStatusFunc(void (GLUTCALLBACK * func)(int state));
+// GLUTAPI void APIENTRY glutKeyboardUpFunc(void (GLUTCALLBACK * func)(unsigned char key, int x, int y));
+// GLUTAPI void APIENTRY glutSpecialUpFunc(void (GLUTCALLBACK * func)(int key, int x, int y));
+// GLUTAPI void APIENTRY glutJoystickFunc(void (GLUTCALLBACK * func)(unsigned int buttonMask, int x, int y, int z), int pollInterval)
+// GLUT color index sub-API
+  glutSetColor := GetProc(libglut, 'glutSetColor');
+  glutGetColor := GetProc(libglut, 'glutGetColor');
+  glutCopyColormap := GetProc(libglut, 'glutCopyColormap');
+// GLUT state retrieval sub-API
+  glutGet := GetProc(libglut, 'glutGet');
+  glutDeviceGet := GetProc(libglut, 'glutDeviceGet');
+  glutExtensionSupported := GetProc(libglut, 'glutExtensionSupported');
+  glutGetModifiers := GetProc(libglut, 'glutGetModifiers');
+  glutLayerGet := GetProc(libglut, 'glutLayerGet');
+// fonts ###
+// pre-built models ###
+// video resize ###
+// debugging ###
+// device control ###
+// GLUT game mode sub-API
+{$ifdef GLUT_GAME}
+  glutGameModeString := GetProc(libglut, 'glutGameModeString');
+  glutEnterGameMode := GetProc(libglut, 'glutEnterGameMode');
+  glutLeaveGameMode := GetProc(libglut, 'glutLeaveGameMode');
+  glutGameModeGet := GetProc(libglut, 'glutGameModeGet');
+{$endif GLUT_GAME}
+
+  GLUTInitialized := True;
+  Result := True;
+end;
+
+
+function InitGLUT: Boolean;
+begin
+  Result := InitGLUTFromLibrary('libglut.so') or
+            InitGLUTFromLibrary('libglut.so.3');
+end;
+
+
+initialization
+  InitGLUT;
+finalization
+  if Assigned(libGLUT) then dlClose(libGLUT);
+end.
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:40  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.4.2.1  2000/10/01 22:12:28  peter
+    * new demo
+
+}

+ 272 - 0
packages/opengl/unix/glx.pp

@@ -0,0 +1,272 @@
+{
+  $Id$
+
+  Translation of the Mesa GLX headers for FreePascal
+  Copyright (C) 1999 Sebastian Guenther
+
+
+  Mesa 3-D graphics library
+  Version:  3.0
+  Copyright (C) 1995-1998  Brian Paul
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Library General Public
+  License as published by the Free Software Foundation; either
+  version 2 of the License, or (at your option) any later version.
+
+  This library 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
+  Library General Public License for more details.
+
+  You should have received a copy of the GNU Library General Public
+  License along with this library; if not, write to the Free
+  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+}
+
+{$MODE delphi}  // objfpc would not work because of direct proc var assignments
+
+{You have to enable Macros (compiler switch "-Sm") for compiling this unit!
+ This is necessary for supporting different platforms with different calling
+ conventions via a single unit.}
+
+unit GLX;
+
+interface
+
+{$MACRO ON}
+
+{$IFDEF Linux}
+  uses
+    X, XLib, XUtil;
+  {$DEFINE HasGLX}  // Activate GLX stuff
+{$ELSE}
+  {$MESSAGE Unsupported platform.}
+{$ENDIF}
+
+{$IFNDEF HasGLX}
+  {$MESSAGE GLX not present on this platform.}
+{$ENDIF}
+
+
+// =======================================================
+//   Unit specific extensions
+// =======================================================
+
+// Note: Requires that the GL library has already been initialized
+function InitGLX: Boolean;
+
+var
+  GLXDumpUnresolvedFunctions,
+  GLXInitialized: Boolean;
+
+
+// =======================================================
+//   GLX consts, types and functions
+// =======================================================
+
+// Tokens for glXChooseVisual and glXGetConfig:
+const
+  GLX_USE_GL                            = 1;
+  GLX_BUFFER_SIZE                       = 2;
+  GLX_LEVEL                             = 3;
+  GLX_RGBA                              = 4;
+  GLX_DOUBLEBUFFER                      = 5;
+  GLX_STEREO                            = 6;
+  GLX_AUX_BUFFERS                       = 7;
+  GLX_RED_SIZE                          = 8;
+  GLX_GREEN_SIZE                        = 9;
+  GLX_BLUE_SIZE                         = 10;
+  GLX_ALPHA_SIZE                        = 11;
+  GLX_DEPTH_SIZE                        = 12;
+  GLX_STENCIL_SIZE                      = 13;
+  GLX_ACCUM_RED_SIZE                    = 14;
+  GLX_ACCUM_GREEN_SIZE                  = 15;
+  GLX_ACCUM_BLUE_SIZE                   = 16;
+  GLX_ACCUM_ALPHA_SIZE                  = 17;
+
+  // GLX_EXT_visual_info extension
+  GLX_X_VISUAL_TYPE_EXT                 = $22;
+  GLX_TRANSPARENT_TYPE_EXT              = $23;
+  GLX_TRANSPARENT_INDEX_VALUE_EXT       = $24;
+  GLX_TRANSPARENT_RED_VALUE_EXT         = $25;
+  GLX_TRANSPARENT_GREEN_VALUE_EXT       = $26;
+  GLX_TRANSPARENT_BLUE_VALUE_EXT        = $27;
+  GLX_TRANSPARENT_ALPHA_VALUE_EXT       = $28;
+
+
+  // Error codes returned by glXGetConfig:
+  GLX_BAD_SCREEN                        = 1;
+  GLX_BAD_ATTRIBUTE                     = 2;
+  GLX_NO_EXTENSION                      = 3;
+  GLX_BAD_VISUAL                        = 4;
+  GLX_BAD_CONTEXT                       = 5;
+  GLX_BAD_VALUE                         = 6;
+  GLX_BAD_ENUM                          = 7;
+
+  // GLX 1.1 and later:
+  GLX_VENDOR                            = 1;
+  GLX_VERSION                           = 2;
+  GLX_EXTENSIONS                        = 3;
+
+  // GLX_visual_info extension
+  GLX_TRUE_COLOR_EXT                    = $8002;
+  GLX_DIRECT_COLOR_EXT                  = $8003;
+  GLX_PSEUDO_COLOR_EXT                  = $8004;
+  GLX_STATIC_COLOR_EXT                  = $8005;
+  GLX_GRAY_SCALE_EXT                    = $8006;
+  GLX_STATIC_GRAY_EXT                   = $8007;
+  GLX_NONE_EXT                          = $8000;
+  GLX_TRANSPARENT_RGB_EXT               = $8008;
+  GLX_TRANSPARENT_INDEX_EXT             = $8009;
+
+type
+  // From XLib:
+  XPixmap = TXID;
+  XFont = TXID;
+  XColormap = TXID;
+
+  GLXContext = Pointer;
+  GLXPixmap = TXID;
+  GLXDrawable = TXID;
+  GLXContextID = TXID;
+
+var
+  glXChooseVisual: function(dpy: PDisplay; screen: Integer; var attribList: Integer): PXVisualInfo; cdecl; cdecl;
+  glXCreateContext: function(dpy: PDisplay; vis: PXVisualInfo; shareList: GLXContext; direct: Boolean): GLXContext; cdecl; cdecl;
+  glXDestroyContext: procedure(dpy: PDisplay; ctx: GLXContext); cdecl; cdecl;
+  glXMakeCurrent: function(dpy: PDisplay; drawable: GLXDrawable; ctx: GLXContext): Boolean; cdecl; cdecl;
+  glXCopyContext: procedure(dpy: PDisplay; src, dst: GLXContext; mask: LongWord); cdecl; cdecl;
+  glXSwapBuffers: procedure(dpy: PDisplay; drawable: GLXDrawable); cdecl; cdecl;
+  glXCreateGLXPixmap: function(dpy: PDisplay; visual: PXVisualInfo; pixmap: XPixmap): GLXPixmap; cdecl; cdecl;
+  glXDestroyGLXPixmap: procedure(dpy: PDisplay; pixmap: GLXPixmap); cdecl; cdecl;
+  glXQueryExtension: function(dpy: PDisplay; var errorb, event: Integer): Boolean; cdecl; cdecl;
+  glXQueryVersion: function(dpy: PDisplay; var maj, min: Integer): Boolean; cdecl; cdecl;
+  glXIsDirect: function(dpy: PDisplay; ctx: GLXContext): Boolean; cdecl; cdecl;
+  glXGetConfig: function(dpy: PDisplay; visual: PXVisualInfo; attrib: Integer; var value: Integer): Integer; cdecl; cdecl;
+  glXGetCurrentContext: function: GLXContext; cdecl; cdecl;
+  glXGetCurrentDrawable: function: GLXDrawable; cdecl; cdecl;
+  glXWaitGL: procedure; cdecl; cdecl;
+  glXWaitX: procedure; cdecl; cdecl;
+  glXUseXFont: procedure(font: XFont; first, count, list: Integer); cdecl; cdecl;
+
+  // GLX 1.1 and later
+  glXQueryExtensionsString: function(dpy: PDisplay; screen: Integer): PChar; cdecl; cdecl;
+  glXQueryServerString: function(dpy: PDisplay; screen, name: Integer): PChar; cdecl; cdecl;
+  glXGetClientString: function(dpy: PDisplay; name: Integer): PChar; cdecl; cdecl;
+
+  // Mesa GLX Extensions
+  glXCreateGLXPixmapMESA: function(dpy: PDisplay; visual: PXVisualInfo; pixmap: XPixmap; cmap: XColormap): GLXPixmap; cdecl; cdecl;
+  glXReleaseBufferMESA: function(dpy: PDisplay; d: GLXDrawable): Boolean; cdecl; cdecl;
+  glXCopySubBufferMESA: procedure(dpy: PDisplay; drawbale: GLXDrawable; x, y, width, height: Integer); cdecl; cdecl;
+  glXGetVideoSyncSGI: function(var counter: LongWord): Integer; cdecl; cdecl;
+  glXWaitVideoSyncSGI: function(divisor, remainder: Integer; var count: LongWord): Integer; cdecl; cdecl;
+
+
+// =======================================================
+//
+// =======================================================
+
+implementation
+
+{$LINKLIB m}
+
+function dlopen(AFile: PChar; mode: LongInt): Pointer; external 'dl';
+function dlclose(handle: Pointer): LongInt; external 'dl';
+function dlsym(handle: Pointer; name: PChar): Pointer; external 'dl';
+
+function LoadLibrary(name: PChar): Pointer;
+begin
+  Result := dlopen(name, $101 {RTLD_GLOBAL or RTLD_LAZY});
+end;
+
+function GetProc(handle: Pointer; name: PChar): Pointer;
+begin
+  Result := dlsym(handle, name);
+  if (Result = nil) and GLXDumpUnresolvedFunctions then
+    WriteLn('Unresolved: ', name);
+end;
+
+var
+  libGLX: Pointer;
+
+function InitGLXFromLibrary(libname:pchar): Boolean;
+begin
+  Result := False;
+  libGLX := LoadLibrary(libname);
+  if not Assigned(libGLX) then exit;
+
+  glXChooseVisual := GetProc(libglx, 'glXChooseVisual');
+  glXCreateContext := GetProc(libglx, 'glXCreateContext');
+  glXDestroyContext := GetProc(libglx, 'glXDestroyContext');
+  glXMakeCurrent := GetProc(libglx, 'glXMakeCurrent');
+  glXCopyContext := GetProc(libglx, 'glXCopyContext');
+  glXSwapBuffers := GetProc(libglx, 'glXSwapBuffers');
+  glXCreateGLXPixmap := GetProc(libglx, 'glXCreateGLXPixmap');
+  glXDestroyGLXPixmap := GetProc(libglx, 'glXDestroyGLXPixmap');
+  glXQueryExtension := GetProc(libglx, 'glXQueryExtension');
+  glXQueryVersion := GetProc(libglx, 'glXQueryVersion');
+  glXIsDirect := GetProc(libglx, 'glXIsDirect');
+  glXGetConfig := GetProc(libglx, 'glXGetConfig');
+  glXGetCurrentContext := GetProc(libglx, 'glXGetCurrentContext');
+  glXGetCurrentDrawable := GetProc(libglx, 'glXGetCurrentDrawable');
+  glXWaitGL := GetProc(libglx, 'glXWaitGL');
+  glXWaitX := GetProc(libglx, 'glXWaitX');
+  glXUseXFont := GetProc(libglx, 'glXUseXFont');
+  // GLX 1.1 and later
+  glXQueryExtensionsString := GetProc(libglx, 'glXQueryExtensionsString');
+  glXQueryServerString := GetProc(libglx, 'glXQueryServerString');
+  glXGetClientString := GetProc(libglx, 'glXGetClientString');
+  // Mesa GLX Extensions
+  glXCreateGLXPixmapMESA := GetProc(libglx, 'glXCreateGLXPixmapMESA');
+  glXReleaseBufferMESA := GetProc(libglx, 'glXReleaseBufferMESA');
+  glXCopySubBufferMESA := GetProc(libglx, 'glXCopySubBufferMESA');
+  glXGetVideoSyncSGI := GetProc(libglx, 'glXGetVideoSyncSGI');
+  glXWaitVideoSyncSGI := GetProc(libglx, 'glXWaitVideoSyncSGI');
+
+  GLXInitialized := True;
+  Result := True;
+end;
+
+function InitGLX: Boolean;
+begin
+  Result := InitGLXFromLibrary('libGL.so') or
+            InitGLXFromLibrary('libGL.so.1') or
+            InitGLXFromLibrary('libMesaGL.so') or
+            InitGLXFromLibrary('libMesaGL.so.3');
+end;
+
+
+initialization
+  InitGLX;
+finalization
+  if Assigned(libGLX) then dlclose(libGLX);
+end.
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:40  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.1.2.1  2000/10/01 22:12:28  peter
+    * new demo
+
+  Revision 1.1  2000/07/13 06:34:18  michael
+  + Initial import
+
+  Revision 1.1  2000/05/31 00:36:08  alex
+  dummy - incomplete code.
+
+}
+
+
+{
+  $Log$
+  Revision 1.1.2.1  2000-11-06 11:35:40  marco
+   * Standard freebsd-unix-linux split
+
+  Revision 1.1.2.1  2000/10/01 22:12:28  peter
+    * new demo
+
+}