]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - glquake.h
added indirection cube map for shadowmapping and revised filtering modes
[xonotic/darkplaces.git] / glquake.h
index a1199233a77425fec9dc88a466b733b59dbd9186..fb7a833548131ea2e19b08b570d57f9c44e69645 100644 (file)
--- a/glquake.h
+++ b/glquake.h
@@ -42,6 +42,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #endif
 
 #ifndef GL_PROJECTION
+#include <stddef.h>
+
 typedef unsigned int GLenum;
 typedef unsigned char GLboolean;
 typedef unsigned int GLbitfield;
@@ -68,6 +70,10 @@ typedef float GLclampf;
 typedef double GLdouble;
 // double precision float in [0,1]
 typedef double GLclampd;
+// int whose size is the same as a pointer (?)
+typedef ptrdiff_t GLintptrARB;
+// int whose size is the same as a pointer (?)
+typedef ptrdiff_t GLsizeiptrARB;
 
 #define GL_MODELVIEW                           0x1700
 #define GL_PROJECTION                          0x1701
@@ -77,11 +83,16 @@ typedef double GLclampd;
 #define GL_PROJECTION_MATRIX                   0x0BA7
 #define GL_TEXTURE_MATRIX                      0x0BA8
 
+#define GL_DONT_CARE                           0x1100
+#define GL_FASTEST                                     0x1101
+#define GL_NICEST                                      0x1102
+
 #define GL_DEPTH_TEST                          0x0B71
 
 #define GL_CULL_FACE                           0x0B44
 
 #define GL_BLEND                               0x0BE2
+#define GL_ALPHA_TEST                  0x0BC0
 
 #define GL_ZERO                                        0x0
 #define GL_ONE                                 0x1
@@ -109,6 +120,7 @@ typedef double GLclampd;
 #define GL_TEXTURE_BORDER_COLOR                        0x1004
 #define GL_TEXTURE_MAG_FILTER                  0x2800
 #define GL_TEXTURE_MIN_FILTER                  0x2801
+#define GL_PACK_ALIGNMENT                      0x0D05
 #define GL_UNPACK_ALIGNMENT                    0x0CF5
 #define GL_TEXTURE_BINDING_1D                   0x8068
 #define GL_TEXTURE_BINDING_2D                   0x8069
@@ -120,6 +132,9 @@ typedef double GLclampd;
 #define GL_LINEAR_MIPMAP_NEAREST               0x2701
 #define GL_LINEAR_MIPMAP_LINEAR                        0x2703
 
+#define GL_LINE                                        0x1B01
+#define GL_FILL                                        0x1B02
+
 extern int gl_support_anisotropy;
 extern int gl_max_anisotropy;
 #define GL_TEXTURE_MAX_ANISOTROPY_EXT          0x84FE
@@ -165,8 +180,20 @@ extern int gl_max_anisotropy;
 #define GL_TEXTURE_COORD_ARRAY                 0x8078
 //#define GL_EDGE_FLAG_ARRAY                   0x8079
 
+#define GL_NONE                                        0
+#define GL_FRONT_LEFT                  0x0400
+#define GL_FRONT_RIGHT                 0x0401
+#define GL_BACK_LEFT                   0x0402
+#define GL_BACK_RIGHT                  0x0403
 #define GL_FRONT                               0x0404
 #define GL_BACK                                        0x0405
+#define GL_LEFT                                        0x0406
+#define GL_RIGHT                               0x0407
+#define GL_FRONT_AND_BACK              0x0408
+#define GL_AUX0                                        0x0409
+#define GL_AUX1                                        0x040A
+#define GL_AUX2                                        0x040B
+#define GL_AUX3                                        0x040C
 
 #define GL_VENDOR                              0x1F00
 #define GL_RENDERER                            0x1F01
@@ -222,6 +249,39 @@ extern int gl_max_anisotropy;
 #define GL_POINT_SMOOTH                         0x0B10
 #define GL_LINE_SMOOTH                          0x0B20
 #define GL_POLYGON_SMOOTH                       0x0B41
+
+#define GL_POLYGON_STIPPLE                0x0B42
+
+#define GL_CLIP_PLANE0                    0x3000
+#define GL_CLIP_PLANE1                    0x3001
+#define GL_CLIP_PLANE2                    0x3002
+#define GL_CLIP_PLANE3                    0x3003
+#define GL_CLIP_PLANE4                    0x3004
+#define GL_CLIP_PLANE5                    0x3005
+
+#define GL_DEPTH_COMPONENT                0x1902
+#define GL_VIEWPORT                       0x0BA2
+#define GL_DRAW_BUFFER                    0x0C01
+#define GL_READ_BUFFER                    0x0C02
+#define GL_LUMINANCE                      0x1909
+#define GL_INTENSITY                      0x8049
+
+#endif
+
+// GL_ARB_depth_texture
+#ifndef GL_DEPTH_COMPOENNT32_ARB
+#define GL_DEPTH_COMPONENT16_ARB          0x81A5
+#define GL_DEPTH_COMPONENT24_ARB          0x81A6
+#define GL_DEPTH_COMPONENT32_ARB          0x81A7
+#define GL_TEXTURE_DEPTH_SIZE_ARB         0x884A
+#define GL_DEPTH_TEXTURE_MODE_ARB         0x884B
+#endif
+
+// GL_ARB_shadow
+#ifndef GL_TEXTURE_COMPARE_MODE_ARB
+#define GL_TEXTURE_COMPARE_MODE_ARB       0x884C
+#define GL_TEXTURE_COMPARE_FUNC_ARB       0x884D
+#define GL_COMPARE_R_TO_TEXTURE_ARB       0x884E
 #endif
 
 extern int gl_max_texture_size;
@@ -347,6 +407,27 @@ extern int gl_max_cube_map_texture_size;
 #define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB               0x851C
 #endif
 
+extern int gl_texturerectangle;
+extern int gl_max_rectangle_texture_size;
+#ifndef GL_TEXTURE_RECTANGLE_ARB
+#define GL_TEXTURE_RECTANGLE_ARB            0x84F5
+#define GL_TEXTURE_BINDING_RECTANGLE_ARB    0x84F6
+#define GL_PROXY_TEXTURE_RECTANGLE_ARB      0x84F7
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB   0x84F8
+#define GL_SAMPLER_2D_RECT_ARB              0x8B63
+#define GL_SAMPLER_2D_RECT_SHADOW_ARB       0x8B64
+#endif
+
+extern int gl_depthtexture;
+#ifndef GL_DEPTH_COMPONENT16_ARB
+#define GL_DEPTH_COMPONENT16_ARB       0x81A5
+#define GL_DEPTH_COMPONENT24_ARB       0x81A6
+#define GL_DEPTH_COMPONENT32_ARB       0x81A7
+#define GL_TEXTURE_DEPTH_SIZE_ARB      0x884A
+#define GL_DEPTH_TEXTURE_MODE_ARB      0x884B
+#endif
+
+
 extern int gl_dot3arb;
 #ifndef GL_DOT3_RGB_ARB
 #define GL_DOT3_RGB_ARB                                0x86AE
@@ -373,12 +454,160 @@ extern int gl_support_clamptoedge;
 #define GL_CLAMP_TO_EDGE 0x812F
 #endif
 
+//GL_ATI_separate_stencil
+extern int gl_support_separatestencil;
+#ifndef GL_STENCIL_BACK_FUNC
+#define GL_STENCIL_BACK_FUNC              0x8800
+#define GL_STENCIL_BACK_FAIL              0x8801
+#define GL_STENCIL_BACK_PASS_DEPTH_FAIL   0x8802
+#define GL_STENCIL_BACK_PASS_DEPTH_PASS   0x8803
+#endif
+extern void (GLAPIENTRY *qglStencilOpSeparate)(GLenum, GLenum, GLenum, GLenum);
+extern void (GLAPIENTRY *qglStencilFuncSeparate)(GLenum, GLenum, GLint, GLuint);
+
 //GL_EXT_stencil_two_side
 #define GL_STENCIL_TEST_TWO_SIDE_EXT      0x8910
 #define GL_ACTIVE_STENCIL_FACE_EXT        0x8911
 extern void (GLAPIENTRY *qglActiveStencilFaceEXT)(GLenum);
 extern int gl_support_stenciltwoside;
 
+//GL_EXT_blend_minmax
+extern int gl_support_ext_blend_minmax;
+#ifndef GL_FUNC_ADD_EXT
+#define GL_FUNC_ADD_EXT                   0x8006 // also supplied by GL_EXT_blend_subtract
+#define GL_MIN_EXT                        0x8007
+#define GL_MAX_EXT                        0x8008
+#define GL_BLEND_EQUATION_EXT             0x8009 // also supplied by GL_EXT_blend_subtract
+extern void (GLAPIENTRY *qglBlendEquationEXT)(GLenum); // also supplied by GL_EXT_blend_subtract
+#endif
+
+//GL_EXT_blend_subtract
+extern int gl_support_ext_blend_subtract;
+#ifndef GL_FUNC_SUBTRACT_EXT
+#define GL_FUNC_SUBTRACT_EXT              0x800A
+#define GL_FUNC_REVERSE_SUBTRACT_EXT      0x800B
+#endif
+
+//GL_ARB_texture_non_power_of_two
+extern int gl_support_arb_texture_non_power_of_two;
+
+//GL_ARB_vertex_buffer_object
+extern int gl_support_arb_vertex_buffer_object;
+#ifndef GL_ARRAY_BUFFER_ARB
+#define GL_ARRAY_BUFFER_ARB               0x8892
+#define GL_ELEMENT_ARRAY_BUFFER_ARB       0x8893
+#define GL_ARRAY_BUFFER_BINDING_ARB       0x8894
+#define GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB 0x8895
+#define GL_VERTEX_ARRAY_BUFFER_BINDING_ARB 0x8896
+#define GL_NORMAL_ARRAY_BUFFER_BINDING_ARB 0x8897
+#define GL_COLOR_ARRAY_BUFFER_BINDING_ARB 0x8898
+#define GL_INDEX_ARRAY_BUFFER_BINDING_ARB 0x8899
+#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB 0x889A
+#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB 0x889B
+#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB 0x889C
+#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB 0x889D
+#define GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB 0x889E
+#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB 0x889F
+#define GL_STREAM_DRAW_ARB                0x88E0
+#define GL_STREAM_READ_ARB                0x88E1
+#define GL_STREAM_COPY_ARB                0x88E2
+#define GL_STATIC_DRAW_ARB                0x88E4
+#define GL_STATIC_READ_ARB                0x88E5
+#define GL_STATIC_COPY_ARB                0x88E6
+#define GL_DYNAMIC_DRAW_ARB               0x88E8
+#define GL_DYNAMIC_READ_ARB               0x88E9
+#define GL_DYNAMIC_COPY_ARB               0x88EA
+#define GL_READ_ONLY_ARB                  0x88B8
+#define GL_WRITE_ONLY_ARB                 0x88B9
+#define GL_READ_WRITE_ARB                 0x88BA
+#define GL_BUFFER_SIZE_ARB                0x8764
+#define GL_BUFFER_USAGE_ARB               0x8765
+#define GL_BUFFER_ACCESS_ARB              0x88BB
+#define GL_BUFFER_MAPPED_ARB              0x88BC
+#define GL_BUFFER_MAP_POINTER_ARB         0x88BD
+#endif
+extern void (GLAPIENTRY *qglBindBufferARB) (GLenum target, GLuint buffer);
+extern void (GLAPIENTRY *qglDeleteBuffersARB) (GLsizei n, const GLuint *buffers);
+extern void (GLAPIENTRY *qglGenBuffersARB) (GLsizei n, GLuint *buffers);
+extern GLboolean (GLAPIENTRY *qglIsBufferARB) (GLuint buffer);
+extern GLvoid* (GLAPIENTRY *qglMapBufferARB) (GLenum target, GLenum access);
+extern GLboolean (GLAPIENTRY *qglUnmapBufferARB) (GLenum target);
+extern void (GLAPIENTRY *qglBufferDataARB) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
+extern void (GLAPIENTRY *qglBufferSubDataARB) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
+
+//GL_EXT_framebuffer_object
+extern int gl_support_ext_framebuffer_object;
+#ifndef GL_FRAMEBUFFER_EXT
+#define GL_FRAMEBUFFER_EXT                                   0x8D40
+#define GL_RENDERBUFFER_EXT                                  0x8D41
+#define GL_STENCIL_INDEX1_EXT                                0x8D46
+#define GL_STENCIL_INDEX4_EXT                                0x8D47
+#define GL_STENCIL_INDEX8_EXT                                0x8D48
+#define GL_STENCIL_INDEX16_EXT                               0x8D49
+#define GL_RENDERBUFFER_WIDTH_EXT                            0x8D42
+#define GL_RENDERBUFFER_HEIGHT_EXT                           0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT                  0x8D44
+#define GL_RENDERBUFFER_RED_SIZE_EXT                         0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE_EXT                       0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE_EXT                        0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE_EXT                       0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE_EXT                       0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT                     0x8D55
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT            0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT            0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT          0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT  0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT     0x8CD4
+#define GL_COLOR_ATTACHMENT0_EXT                             0x8CE0
+#define GL_COLOR_ATTACHMENT1_EXT                             0x8CE1
+#define GL_COLOR_ATTACHMENT2_EXT                             0x8CE2
+#define GL_COLOR_ATTACHMENT3_EXT                             0x8CE3
+#define GL_COLOR_ATTACHMENT4_EXT                             0x8CE4
+#define GL_COLOR_ATTACHMENT5_EXT                             0x8CE5
+#define GL_COLOR_ATTACHMENT6_EXT                             0x8CE6
+#define GL_COLOR_ATTACHMENT7_EXT                             0x8CE7
+#define GL_COLOR_ATTACHMENT8_EXT                             0x8CE8
+#define GL_COLOR_ATTACHMENT9_EXT                             0x8CE9
+#define GL_COLOR_ATTACHMENT10_EXT                            0x8CEA
+#define GL_COLOR_ATTACHMENT11_EXT                            0x8CEB
+#define GL_COLOR_ATTACHMENT12_EXT                            0x8CEC
+#define GL_COLOR_ATTACHMENT13_EXT                            0x8CED
+#define GL_COLOR_ATTACHMENT14_EXT                            0x8CEE
+#define GL_COLOR_ATTACHMENT15_EXT                            0x8CEF
+#define GL_DEPTH_ATTACHMENT_EXT                              0x8D00
+#define GL_STENCIL_ATTACHMENT_EXT                            0x8D20
+#define GL_FRAMEBUFFER_COMPLETE_EXT                          0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT             0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT     0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT             0x8CD9
+#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT                0x8CDA
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT            0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT            0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED_EXT                       0x8CDD
+#define GL_FRAMEBUFFER_BINDING_EXT                           0x8CA6
+#define GL_RENDERBUFFER_BINDING_EXT                          0x8CA7
+#define GL_MAX_COLOR_ATTACHMENTS_EXT                         0x8CDF
+#define GL_MAX_RENDERBUFFER_SIZE_EXT                         0x84E8
+#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT                 0x0506
+#endif
+extern GLboolean (GLAPIENTRY *qglIsRenderbufferEXT)(GLuint renderbuffer);
+extern void (GLAPIENTRY *qglBindRenderbufferEXT)(GLenum target, GLuint renderbuffer);
+extern void (GLAPIENTRY *qglDeleteRenderbuffersEXT)(GLsizei n, const GLuint *renderbuffers);
+extern void (GLAPIENTRY *qglGenRenderbuffersEXT)(GLsizei n, GLuint *renderbuffers);
+extern void (GLAPIENTRY *qglRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+extern void (GLAPIENTRY *qglGetRenderbufferParameterivEXT)(GLenum target, GLenum pname, GLint *params);
+extern GLboolean (GLAPIENTRY *qglIsFramebufferEXT)(GLuint framebuffer);
+extern void (GLAPIENTRY *qglBindFramebufferEXT)(GLenum target, GLuint framebuffer);
+extern void (GLAPIENTRY *qglDeleteFramebuffersEXT)(GLsizei n, const GLuint *framebuffers);
+extern void (GLAPIENTRY *qglGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers);
+extern GLenum (GLAPIENTRY *qglCheckFramebufferStatusEXT)(GLenum target);
+extern void (GLAPIENTRY *qglFramebufferTexture1DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+extern void (GLAPIENTRY *qglFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+extern void (GLAPIENTRY *qglFramebufferTexture3DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+extern void (GLAPIENTRY *qglFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+extern void (GLAPIENTRY *qglGetFramebufferAttachmentParameterivEXT)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
+extern void (GLAPIENTRY *qglGenerateMipmapEXT)(GLenum target);
+
 extern void (GLAPIENTRY *qglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
 
 extern void (GLAPIENTRY *qglClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
@@ -463,6 +692,7 @@ extern void (GLAPIENTRY *qglTexEnvi)(GLenum target, GLenum pname, GLint param);
 extern void (GLAPIENTRY *qglTexParameterf)(GLenum target, GLenum pname, GLfloat param);
 extern void (GLAPIENTRY *qglTexParameterfv)(GLenum target, GLenum pname, GLfloat *params);
 extern void (GLAPIENTRY *qglTexParameteri)(GLenum target, GLenum pname, GLint param);
+extern void (GLAPIENTRY *qglHint)(GLenum target, GLenum mode);
 
 extern void (GLAPIENTRY *qglGenTextures)(GLsizei n, GLuint *textures);
 extern void (GLAPIENTRY *qglDeleteTextures)(GLsizei n, const GLuint *textures);
@@ -483,6 +713,10 @@ extern void (GLAPIENTRY *qglCopyTexSubImage1D)(GLenum target, GLint level, GLint
 extern void (GLAPIENTRY *qglCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 
 extern void (GLAPIENTRY *qglPolygonOffset)(GLfloat factor, GLfloat units);
+extern void (GLAPIENTRY *qglPolygonMode)(GLenum face, GLenum mode);
+
+extern void (GLAPIENTRY *qglClipPlane)(GLenum plane, const GLdouble *equation);
+extern void (GLAPIENTRY *qglGetClipPlane)(GLenum plane, GLdouble *equation);
 
 //[515]: added on 29.07.2005
 extern void (GLAPIENTRY *qglLineWidth)(GLfloat width);
@@ -494,7 +728,7 @@ extern int gl_support_shader_objects;
 // 1-byte character string
 typedef char GLcharARB;
 // 4-byte integer handle to a shader object or program object
-typedef int GLhandleARB;
+typedef unsigned int GLhandleARB;
 #endif
 extern void (GLAPIENTRY *qglDeleteObjectARB)(GLhandleARB obj);
 extern GLhandleARB (GLAPIENTRY *qglGetHandleARB)(GLenum pname);
@@ -535,6 +769,7 @@ extern void (GLAPIENTRY *qglGetActiveUniformARB)(GLhandleARB programObj, GLuint
 extern void (GLAPIENTRY *qglGetUniformfvARB)(GLhandleARB programObj, GLint location, GLfloat *params);
 extern void (GLAPIENTRY *qglGetUniformivARB)(GLhandleARB programObj, GLint location, GLint *params);
 extern void (GLAPIENTRY *qglGetShaderSourceARB)(GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
+extern void (GLAPIENTRY *qglPolygonStipple)(const GLubyte *mask);
 #ifndef GL_PROGRAM_OBJECT_ARB
 #define GL_PROGRAM_OBJECT_ARB                                  0x8B40
 #define GL_OBJECT_TYPE_ARB                                             0x8B4E
@@ -667,20 +902,61 @@ extern int gl_support_shading_language_100;
 #define GL_SHADING_LANGUAGE_VERSION_ARB                                0x8B8C
 #endif
 
+// GL_ARB_texture_compression
+extern int gl_support_texture_compression;
+extern void (GLAPIENTRY *qglCompressedTexImage3DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglCompressedTexImage2DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border,  GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglCompressedTexImage1DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglCompressedTexSubImage3DARB)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglCompressedTexSubImage2DARB)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglCompressedTexSubImage1DARB)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLsizei imageSize, const void *data);
+extern void (GLAPIENTRY *qglGetCompressedTexImageARB)(GLenum target, GLint lod, void *img);
+#ifndef GL_COMPRESSED_RGB_ARB
+#define GL_COMPRESSED_ALPHA_ARB                                                0x84E9
+#define GL_COMPRESSED_LUMINANCE_ARB                                    0x84EA
+#define GL_COMPRESSED_LUMINANCE_ALPHA_ARB                      0x84EB
+#define GL_COMPRESSED_INTENSITY_ARB                                    0x84EC
+#define GL_COMPRESSED_RGB_ARB                                          0x84ED
+#define GL_COMPRESSED_RGBA_ARB                                         0x84EE
+#define GL_TEXTURE_COMPRESSION_HINT_ARB                                0x84EF
+#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB           0x86A0
+#define GL_TEXTURE_COMPRESSED_ARB                                      0x86A1
+#define GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB          0x86A2
+#define GL_COMPRESSED_TEXTURE_FORMATS_ARB                      0x86A3
+#endif
+
+// GL_ARB_occlusion_query
+extern int gl_support_arb_occlusion_query;
+extern void (GLAPIENTRY *qglGenQueriesARB)(GLsizei n, GLuint *ids);
+extern void (GLAPIENTRY *qglDeleteQueriesARB)(GLsizei n, const GLuint *ids);
+extern GLboolean (GLAPIENTRY *qglIsQueryARB)(GLuint qid);
+extern void (GLAPIENTRY *qglBeginQueryARB)(GLenum target, GLuint qid);
+extern void (GLAPIENTRY *qglEndQueryARB)(GLenum target);
+extern void (GLAPIENTRY *qglGetQueryivARB)(GLenum target, GLenum pname, GLint *params);
+extern void (GLAPIENTRY *qglGetQueryObjectivARB)(GLuint qid, GLenum pname, GLint *params);
+extern void (GLAPIENTRY *qglGetQueryObjectuivARB)(GLuint qid, GLenum pname, GLuint *params);
+#ifndef GL_SAMPLES_PASSED_ARB
+#define GL_SAMPLES_PASSED_ARB                             0x8914
+#define GL_QUERY_COUNTER_BITS_ARB                         0x8864
+#define GL_CURRENT_QUERY_ARB                              0x8865
+#define GL_QUERY_RESULT_ARB                               0x8866
+#define GL_QUERY_RESULT_AVAILABLE_ARB                     0x8867
+#endif
+
 // GL_EXT_bgr
 #define GL_BGR                                 0x80E0
 
 // GL_EXT_bgra
 #define GL_BGRA                                        0x80E1
 
-// GL_NV_half_float
-extern int gl_support_half_float;
-// note: this extension has GL_HALF stuff for feeding half floats but I don't use that
+// GL_EXT_texture
+#define GL_LUMINANCE_ALPHA                0x190A
+#define GL_LUMINANCE16_ALPHA16            0x8048
 
 #define DEBUGGL
 
 #ifdef DEBUGGL
-#define CHECKGLERROR {if (gl_printcheckerror.integer) Con_Printf("CHECKGLERROR at %s:%d\n", __FILE__, __LINE__);if (gl_paranoid.integer && (errornumber = qglGetError())) GL_PrintError(errornumber, __FILE__, __LINE__);}
+#define CHECKGLERROR {if (gl_paranoid.integer){if (gl_printcheckerror.integer) Con_Printf("CHECKGLERROR at %s:%d\n", __FILE__, __LINE__);errornumber = qglGetError();if (errornumber) GL_PrintError(errornumber, __FILE__, __LINE__);}}
 extern int errornumber;
 void GL_PrintError(int errornumber, char *filename, int linenumber);
 #else