static qboolean GLimp_CheckForVersionExtension(const char *ext, int coresince, qboolean required, cvar_t *var)
{
qboolean result = qfalse;
if ((coresince >= 0 && coresince <= glConfig2.contextCombined) || GL_CheckForExtension(ext))
{
if (var && var->integer)
{
result = qtrue;
}
else if (!var)
{
result = qtrue;
}
}
if (required && !result)
{
Ren_Fatal(MSG_ERR_OLD_VIDEO_DRIVER "\nYour GL driver is missing support for: %s\n", ext);
}
if (result)
{
Com_Printf("...found OpenGL extension - %s\n", ext);
}
else
{
if (var)
{
Com_Printf("...ignoring %s\n", ext);
}
else
{
Com_Printf("...%s not found\n", ext);
}
}
return result;
}
static void GLimp_InitExtensions( void )
{
if ( !r_allowExtensions->integer )
{
Com_Printf ("*** IGNORING OPENGL EXTENSIONS ***\n" );
g_bDynamicGlowSupported = false;
ri->Cvar_Set( "r_DynamicGlow","0" );
return;
}
Com_Printf ("Initializing OpenGL extensions\n" );
// Select our tc scheme
GLW_InitTextureCompression();
// GL_EXT_texture_env_add
glConfig.textureEnvAddAvailable = qfalse;
if ( GL_CheckForExtension( "EXT_texture_env_add" ) )
{
if ( r_ext_texture_env_add->integer )
{
glConfig.textureEnvAddAvailable = qtrue;
Com_Printf ("...using GL_EXT_texture_env_add\n" );
}
else
{
glConfig.textureEnvAddAvailable = qfalse;
Com_Printf ("...ignoring GL_EXT_texture_env_add\n" );
}
}
else
{
Com_Printf ("...GL_EXT_texture_env_add not found\n" );
}
// GL_EXT_texture_filter_anisotropic
glConfig.maxTextureFilterAnisotropy = 0;
if ( GL_CheckForExtension( "EXT_texture_filter_anisotropic" ) )
{
#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF //can't include glext.h here ... sigh
qglGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &glConfig.maxTextureFilterAnisotropy );
Com_Printf ("...GL_EXT_texture_filter_anisotropic available\n" );
if ( r_ext_texture_filter_anisotropic->integer > 1 )
{
Com_Printf ("...using GL_EXT_texture_filter_anisotropic\n" );
}
else
{
Com_Printf ("...ignoring GL_EXT_texture_filter_anisotropic\n" );
}
ri->Cvar_SetValue( "r_ext_texture_filter_anisotropic_avail", glConfig.maxTextureFilterAnisotropy );
if ( r_ext_texture_filter_anisotropic->value > glConfig.maxTextureFilterAnisotropy )
{
ri->Cvar_SetValue( "r_ext_texture_filter_anisotropic_avail", glConfig.maxTextureFilterAnisotropy );
}
}
else
{
Com_Printf ("...GL_EXT_texture_filter_anisotropic not found\n" );
ri->Cvar_Set( "r_ext_texture_filter_anisotropic_avail", "0" );
}
// GL_EXT_clamp_to_edge
glConfig.clampToEdgeAvailable = qtrue;
Com_Printf ("...using GL_EXT_texture_edge_clamp\n" );
// GL_ARB_multitexture
qglMultiTexCoord2fARB = NULL;
qglActiveTextureARB = NULL;
qglClientActiveTextureARB = NULL;
if ( GL_CheckForExtension( "GL_ARB_multitexture" ) )
{
if ( r_ext_multitexture->integer )
{
qglMultiTexCoord2fARB = ( PFNGLMULTITEXCOORD2FARBPROC ) SDL_GL_GetProcAddress( "glMultiTexCoord2fARB" );
qglActiveTextureARB = ( PFNGLACTIVETEXTUREARBPROC ) SDL_GL_GetProcAddress( "glActiveTextureARB" );
qglClientActiveTextureARB = ( PFNGLCLIENTACTIVETEXTUREARBPROC ) SDL_GL_GetProcAddress( "glClientActiveTextureARB" );
if ( qglActiveTextureARB )
{
qglGetIntegerv( GL_MAX_ACTIVE_TEXTURES_ARB, &glConfig.maxActiveTextures );
if ( glConfig.maxActiveTextures > 1 )
{
Com_Printf ("...using GL_ARB_multitexture\n" );
}
else
{
qglMultiTexCoord2fARB = NULL;
qglActiveTextureARB = NULL;
qglClientActiveTextureARB = NULL;
Com_Printf ("...not using GL_ARB_multitexture, < 2 texture units\n" );
}
}
}
else
{
Com_Printf ("...ignoring GL_ARB_multitexture\n" );
}
}
else
{
Com_Printf ("...GL_ARB_multitexture not found\n" );
}
// GL_EXT_compiled_vertex_array
qglLockArraysEXT = NULL;
qglUnlockArraysEXT = NULL;
if ( GL_CheckForExtension( "GL_EXT_compiled_vertex_array" ) )
{
if ( r_ext_compiled_vertex_array->integer )
{
Com_Printf ("...using GL_EXT_compiled_vertex_array\n" );
qglLockArraysEXT = ( void ( APIENTRY * )( int, int ) ) SDL_GL_GetProcAddress( "glLockArraysEXT" );
qglUnlockArraysEXT = ( void ( APIENTRY * )( void ) ) SDL_GL_GetProcAddress( "glUnlockArraysEXT" );
if (!qglLockArraysEXT || !qglUnlockArraysEXT) {
Com_Error (ERR_FATAL, "bad getprocaddress");
}
}
else
{
Com_Printf ("...ignoring GL_EXT_compiled_vertex_array\n" );
}
}
else
{
Com_Printf ("...GL_EXT_compiled_vertex_array not found\n" );
}
qglPointParameterfEXT = NULL;
qglPointParameterfvEXT = NULL;
//3d textures -rww
qglTexImage3DEXT = NULL;
qglTexSubImage3DEXT = NULL;
if ( GL_CheckForExtension( "GL_EXT_point_parameters" ) )
{
if ( r_ext_compiled_vertex_array->integer )
{
Com_Printf ("...using GL_EXT_point_parameters\n" );
qglPointParameterfEXT = ( void ( APIENTRY * )( GLenum, GLfloat) ) SDL_GL_GetProcAddress( "glPointParameterfEXT" );
qglPointParameterfvEXT = ( void ( APIENTRY * )( GLenum, GLfloat *) ) SDL_GL_GetProcAddress( "glPointParameterfvEXT" );
//3d textures -rww
qglTexImage3DEXT = (void ( APIENTRY * ) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, const GLvoid *) ) SDL_GL_GetProcAddress( "glTexImage3DEXT" );
qglTexSubImage3DEXT = (void ( APIENTRY * ) (GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei, GLenum, GLenum, const GLvoid *) ) SDL_GL_GetProcAddress( "glTexSubImage3DEXT" );
if (!qglPointParameterfEXT || !qglPointParameterfvEXT)
{
Com_Error (ERR_FATAL, "bad getprocaddress");
}
}
else
{
Com_Printf ("...ignoring GL_EXT_point_parameters\n" );
}
}
else
{
Com_Printf ("...GL_EXT_point_parameters not found\n" );
}
bool bNVRegisterCombiners = false;
// Register Combiners.
if ( GL_CheckForExtension( "GL_NV_register_combiners" ) )
{
// NOTE: This extension requires multitexture support (over 2 units).
if ( glConfig.maxActiveTextures >= 2 )
{
bNVRegisterCombiners = true;
// Register Combiners function pointer address load. - AReis
// NOTE: VV guys will _definetly_ not be able to use regcoms. Pixel Shaders are just as good though :-)
// NOTE: Also, this is an nVidia specific extension (of course), so fragment shaders would serve the same purpose
// if we needed some kind of fragment/pixel manipulation support.
qglCombinerParameterfvNV = (PFNGLCOMBINERPARAMETERFVNVPROC)SDL_GL_GetProcAddress( "glCombinerParameterfvNV" );
qglCombinerParameterivNV = (PFNGLCOMBINERPARAMETERIVNVPROC)SDL_GL_GetProcAddress( "glCombinerParameterivNV" );
qglCombinerParameterfNV = (PFNGLCOMBINERPARAMETERFNVPROC)SDL_GL_GetProcAddress( "glCombinerParameterfNV" );
qglCombinerParameteriNV = (PFNGLCOMBINERPARAMETERINVPROC)SDL_GL_GetProcAddress( "glCombinerParameteriNV" );
qglCombinerInputNV = (PFNGLCOMBINERINPUTNVPROC)SDL_GL_GetProcAddress( "glCombinerInputNV" );
qglCombinerOutputNV = (PFNGLCOMBINEROUTPUTNVPROC)SDL_GL_GetProcAddress( "glCombinerOutputNV" );
qglFinalCombinerInputNV = (PFNGLFINALCOMBINERINPUTNVPROC)SDL_GL_GetProcAddress( "glFinalCombinerInputNV" );
qglGetCombinerInputParameterfvNV = (PFNGLGETCOMBINERINPUTPARAMETERFVNVPROC)SDL_GL_GetProcAddress( "glGetCombinerInputParameterfvNV" );
qglGetCombinerInputParameterivNV = (PFNGLGETCOMBINERINPUTPARAMETERIVNVPROC)SDL_GL_GetProcAddress( "glGetCombinerInputParameterivNV" );
qglGetCombinerOutputParameterfvNV = (PFNGLGETCOMBINEROUTPUTPARAMETERFVNVPROC)SDL_GL_GetProcAddress( "glGetCombinerOutputParameterfvNV" );
qglGetCombinerOutputParameterivNV = (PFNGLGETCOMBINEROUTPUTPARAMETERIVNVPROC)SDL_GL_GetProcAddress( "glGetCombinerOutputParameterivNV" );
qglGetFinalCombinerInputParameterfvNV = (PFNGLGETFINALCOMBINERINPUTPARAMETERFVNVPROC)SDL_GL_GetProcAddress( "glGetFinalCombinerInputParameterfvNV" );
qglGetFinalCombinerInputParameterivNV = (PFNGLGETFINALCOMBINERINPUTPARAMETERIVNVPROC)SDL_GL_GetProcAddress( "glGetFinalCombinerInputParameterivNV" );
// Validate the functions we need.
if ( !qglCombinerParameterfvNV || !qglCombinerParameterivNV || !qglCombinerParameterfNV || !qglCombinerParameteriNV || !qglCombinerInputNV ||
!qglCombinerOutputNV || !qglFinalCombinerInputNV || !qglGetCombinerInputParameterfvNV || !qglGetCombinerInputParameterivNV ||
!qglGetCombinerOutputParameterfvNV || !qglGetCombinerOutputParameterivNV || !qglGetFinalCombinerInputParameterfvNV || !qglGetFinalCombinerInputParameterivNV )
{
bNVRegisterCombiners = false;
qglCombinerParameterfvNV = NULL;
qglCombinerParameteriNV = NULL;
Com_Printf ("...GL_NV_register_combiners failed\n" );
}
}
else
{
bNVRegisterCombiners = false;
Com_Printf ("...ignoring GL_NV_register_combiners\n" );
}
}
else
{
bNVRegisterCombiners = false;
Com_Printf ("...GL_NV_register_combiners not found\n" );
}
// NOTE: Vertex and Fragment Programs are very dependant on each other - this is actually a
// good thing! So, just check to see which we support (one or the other) and load the shared
// function pointers. ARB rocks!
// Vertex Programs.
bool bARBVertexProgram = false;
if ( GL_CheckForExtension( "GL_ARB_vertex_program" ) )
{
bARBVertexProgram = true;
}
else
{
bARBVertexProgram = false;
Com_Printf ("...GL_ARB_vertex_program not found\n" );
}
// Fragment Programs.
bool bARBFragmentProgram = false;
if ( GL_CheckForExtension( "GL_ARB_fragment_program" ) )
{
bARBFragmentProgram = true;
}
else
{
bARBFragmentProgram = false;
Com_Printf ("...GL_ARB_fragment_program not found\n" );
}
// If we support one or the other, load the shared function pointers.
if ( bARBVertexProgram || bARBFragmentProgram )
{
qglProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC) SDL_GL_GetProcAddress("glProgramStringARB");
qglBindProgramARB = (PFNGLBINDPROGRAMARBPROC) SDL_GL_GetProcAddress("glBindProgramARB");
qglDeleteProgramsARB = (PFNGLDELETEPROGRAMSARBPROC) SDL_GL_GetProcAddress("glDeleteProgramsARB");
qglGenProgramsARB = (PFNGLGENPROGRAMSARBPROC) SDL_GL_GetProcAddress("glGenProgramsARB");
qglProgramEnvParameter4dARB = (PFNGLPROGRAMENVPARAMETER4DARBPROC) SDL_GL_GetProcAddress("glProgramEnvParameter4dARB");
qglProgramEnvParameter4dvARB = (PFNGLPROGRAMENVPARAMETER4DVARBPROC) SDL_GL_GetProcAddress("glProgramEnvParameter4dvARB");
qglProgramEnvParameter4fARB = (PFNGLPROGRAMENVPARAMETER4FARBPROC) SDL_GL_GetProcAddress("glProgramEnvParameter4fARB");
qglProgramEnvParameter4fvARB = (PFNGLPROGRAMENVPARAMETER4FVARBPROC) SDL_GL_GetProcAddress("glProgramEnvParameter4fvARB");
qglProgramLocalParameter4dARB = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) SDL_GL_GetProcAddress("glProgramLocalParameter4dARB");
qglProgramLocalParameter4dvARB = (PFNGLPROGRAMLOCALPARAMETER4DVARBPROC) SDL_GL_GetProcAddress("glProgramLocalParameter4dvARB");
qglProgramLocalParameter4fARB = (PFNGLPROGRAMLOCALPARAMETER4FARBPROC) SDL_GL_GetProcAddress("glProgramLocalParameter4fARB");
qglProgramLocalParameter4fvARB = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) SDL_GL_GetProcAddress("glProgramLocalParameter4fvARB");
qglGetProgramEnvParameterdvARB = (PFNGLGETPROGRAMENVPARAMETERDVARBPROC) SDL_GL_GetProcAddress("glGetProgramEnvParameterdvARB");
qglGetProgramEnvParameterfvARB = (PFNGLGETPROGRAMENVPARAMETERFVARBPROC) SDL_GL_GetProcAddress("glGetProgramEnvParameterfvARB");
qglGetProgramLocalParameterdvARB = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) SDL_GL_GetProcAddress("glGetProgramLocalParameterdvARB");
qglGetProgramLocalParameterfvARB = (PFNGLGETPROGRAMLOCALPARAMETERFVARBPROC) SDL_GL_GetProcAddress("glGetProgramLocalParameterfvARB");
qglGetProgramivARB = (PFNGLGETPROGRAMIVARBPROC) SDL_GL_GetProcAddress("glGetProgramivARB");
qglGetProgramStringARB = (PFNGLGETPROGRAMSTRINGARBPROC) SDL_GL_GetProcAddress("glGetProgramStringARB");
qglIsProgramARB = (PFNGLISPROGRAMARBPROC) SDL_GL_GetProcAddress("glIsProgramARB");
// Validate the functions we need.
if ( !qglProgramStringARB || !qglBindProgramARB || !qglDeleteProgramsARB || !qglGenProgramsARB ||
!qglProgramEnvParameter4dARB || !qglProgramEnvParameter4dvARB || !qglProgramEnvParameter4fARB ||
!qglProgramEnvParameter4fvARB || !qglProgramLocalParameter4dARB || !qglProgramLocalParameter4dvARB ||
!qglProgramLocalParameter4fARB || !qglProgramLocalParameter4fvARB || !qglGetProgramEnvParameterdvARB ||
!qglGetProgramEnvParameterfvARB || !qglGetProgramLocalParameterdvARB || !qglGetProgramLocalParameterfvARB ||
!qglGetProgramivARB || !qglGetProgramStringARB || !qglIsProgramARB )
{
bARBVertexProgram = false;
bARBFragmentProgram = false;
qglGenProgramsARB = NULL; //clear ptrs that get checked
qglProgramEnvParameter4fARB = NULL;
Com_Printf ("...ignoring GL_ARB_vertex_program\n" );
Com_Printf ("...ignoring GL_ARB_fragment_program\n" );
}
}
// Figure out which texture rectangle extension to use.
bool bTexRectSupported = false;
if ( Q_stricmpn( glConfig.vendor_string, "ATI Technologies",16 )==0
&& Q_stricmpn( glConfig.version_string, "1.3.3",5 )==0
&& glConfig.version_string[5] < '9' ) //1.3.34 and 1.3.37 and 1.3.38 are broken for sure, 1.3.39 is not
{
g_bTextureRectangleHack = true;
}
if ( GL_CheckForExtension( "GL_NV_texture_rectangle" ) || GL_CheckForExtension( "GL_EXT_texture_rectangle" ) )
{
bTexRectSupported = true;
}
// Find out how many general combiners they have.
#define GL_MAX_GENERAL_COMBINERS_NV 0x854D
GLint iNumGeneralCombiners = 0;
if(bNVRegisterCombiners)
qglGetIntegerv( GL_MAX_GENERAL_COMBINERS_NV, &iNumGeneralCombiners );
// Only allow dynamic glows/flares if they have the hardware
if ( bTexRectSupported && bARBVertexProgram && qglActiveTextureARB && glConfig.maxActiveTextures >= 4 &&
( ( bNVRegisterCombiners && iNumGeneralCombiners >= 2 ) || bARBFragmentProgram ) )
{
g_bDynamicGlowSupported = true;
// this would overwrite any achived setting gwg
// Cvar_Set( "r_DynamicGlow", "1" );
}
else
{
g_bDynamicGlowSupported = false;
ri->Cvar_Set( "r_DynamicGlow","0" );
}
}
static void GLW_InitTextureCompression( void )
{
bool newer_tc, old_tc;
// Check for available tc methods.
newer_tc = GL_CheckForExtension("ARB_texture_compression") && GL_CheckForExtension("EXT_texture_compression_s3tc");
old_tc = GL_CheckForExtension("GL_S3_s3tc");
if ( old_tc )
{
Com_Printf ("...GL_S3_s3tc available\n" );
}
if ( newer_tc )
{
Com_Printf ("...GL_EXT_texture_compression_s3tc available\n" );
}
if ( !r_ext_compressed_textures->value )
{
// Compressed textures are off
glConfig.textureCompression = TC_NONE;
Com_Printf ("...ignoring texture compression\n" );
}
else if ( !old_tc && !newer_tc )
{
// Requesting texture compression, but no method found
glConfig.textureCompression = TC_NONE;
Com_Printf ("...no supported texture compression method found\n" );
Com_Printf (".....ignoring texture compression\n" );
}
else
{
// some form of supported texture compression is avaiable, so see if the user has a preference
if ( r_ext_preferred_tc_method->integer == TC_NONE )
{
// No preference, so pick the best
if ( newer_tc )
{
Com_Printf ("...no tc preference specified\n" );
Com_Printf (".....using GL_EXT_texture_compression_s3tc\n" );
glConfig.textureCompression = TC_S3TC_DXT;
}
else
{
Com_Printf ("...no tc preference specified\n" );
Com_Printf (".....using GL_S3_s3tc\n" );
glConfig.textureCompression = TC_S3TC;
}
}
else
{
// User has specified a preference, now see if this request can be honored
if ( old_tc && newer_tc )
{
// both are avaiable, so we can use the desired tc method
if ( r_ext_preferred_tc_method->integer == TC_S3TC )
{
Com_Printf ("...using preferred tc method, GL_S3_s3tc\n" );
glConfig.textureCompression = TC_S3TC;
}
else
{
Com_Printf ("...using preferred tc method, GL_EXT_texture_compression_s3tc\n" );
glConfig.textureCompression = TC_S3TC_DXT;
}
}
else
{
// Both methods are not available, so this gets trickier
if ( r_ext_preferred_tc_method->integer == TC_S3TC )
{
// Preferring to user older compression
if ( old_tc )
{
Com_Printf ("...using GL_S3_s3tc\n" );
glConfig.textureCompression = TC_S3TC;
}
else
{
// Drat, preference can't be honored
Com_Printf ("...preferred tc method, GL_S3_s3tc not available\n" );
Com_Printf (".....falling back to GL_EXT_texture_compression_s3tc\n" );
glConfig.textureCompression = TC_S3TC_DXT;
}
}
else
{
// Preferring to user newer compression
if ( newer_tc )
{
Com_Printf ("...using GL_EXT_texture_compression_s3tc\n" );
glConfig.textureCompression = TC_S3TC_DXT;
}
else
{
// Drat, preference can't be honored
Com_Printf ("...preferred tc method, GL_EXT_texture_compression_s3tc not available\n" );
Com_Printf (".....falling back to GL_S3_s3tc\n" );
glConfig.textureCompression = TC_S3TC;
}
}
}
}
}
}