PDGL_API void pdglGetFloatv( GLenum pname, GLfloat *params )
{
if(pglGetFloatv)
{ pglGetFloatv(pname, params); return; }
pglGetFloatv=pdglGetProcAddress("glGetFloatv");
pglGetFloatv(pname, params);
}
// set depth buffer range
static void ogl_DepthRange( FLOAT fMin, FLOAT fMax)
{
// check consistency
ASSERT( _pGfx->gl_eCurrentAPI==GAT_OGL);
#ifndef NDEBUG
GLfloat fDepths[2];
pglGetFloatv( GL_DEPTH_RANGE, fDepths);
OGL_CHECKERROR;
ASSERT( fDepths[0]==GFX_fMinDepthRange && fDepths[1]==GFX_fMaxDepthRange);
#endif
// cached?
if( GFX_fMinDepthRange==fMin && GFX_fMaxDepthRange==fMax && gap_bOptimizeStateChanges) return;
GFX_fMinDepthRange = fMin;
GFX_fMaxDepthRange = fMax;
_sfStats.StartTimer(CStatForm::STI_GFXAPI);
pglDepthRange( fMin, fMax);
OGL_CHECKERROR;
_sfStats.StopTimer(CStatForm::STI_GFXAPI);
}
void GL_InitExtensions( void )
{
// initialize gl extensions
GL_CheckExtension( "OpenGL 1.1.0", opengl_110funcs, NULL, GL_OPENGL_110 );
// get our various GL strings
glConfig.vendor_string = pglGetString( GL_VENDOR );
glConfig.renderer_string = pglGetString( GL_RENDERER );
glConfig.version_string = pglGetString( GL_VERSION );
glConfig.extensions_string = pglGetString( GL_EXTENSIONS );
MsgDev( D_INFO, "Video: %s\n", glConfig.renderer_string );
// initalize until base opengl functions loaded
GL_CheckExtension( "glDrawRangeElements", drawrangeelementsfuncs, "gl_drawrangeelments", GL_DRAW_RANGEELEMENTS_EXT );
if( !GL_Support( GL_DRAW_RANGEELEMENTS_EXT ))
GL_CheckExtension( "GL_EXT_draw_range_elements", drawrangeelementsextfuncs, "gl_drawrangeelments", GL_DRAW_RANGEELEMENTS_EXT );
// multitexture
glConfig.max_texture_units = glConfig.max_texture_coords = glConfig.max_teximage_units = 1;
GL_CheckExtension( "GL_ARB_multitexture", multitexturefuncs, "gl_arb_multitexture", GL_ARB_MULTITEXTURE );
if( GL_Support( GL_ARB_MULTITEXTURE ))
{
pglGetIntegerv( GL_MAX_TEXTURE_UNITS_ARB, &glConfig.max_texture_units );
GL_CheckExtension( "GL_ARB_texture_env_combine", NULL, "gl_texture_env_combine", GL_ENV_COMBINE_EXT );
if( !GL_Support( GL_ENV_COMBINE_EXT ))
GL_CheckExtension( "GL_EXT_texture_env_combine", NULL, "gl_texture_env_combine", GL_ENV_COMBINE_EXT );
if( GL_Support( GL_ENV_COMBINE_EXT ))
GL_CheckExtension( "GL_ARB_texture_env_dot3", NULL, "gl_texture_env_dot3", GL_DOT3_ARB_EXT );
}
else
{
GL_CheckExtension( "GL_SGIS_multitexture", sgis_multitexturefuncs, "gl_sgis_multitexture", GL_ARB_MULTITEXTURE );
if( GL_Support( GL_ARB_MULTITEXTURE )) glConfig.max_texture_units = 2;
}
if( glConfig.max_texture_units == 1 )
GL_SetExtension( GL_ARB_MULTITEXTURE, false );
// 3d texture support
GL_CheckExtension( "GL_EXT_texture3D", texture3dextfuncs, "gl_texture_3d", GL_TEXTURE_3D_EXT );
if( GL_Support( GL_TEXTURE_3D_EXT ))
{
pglGetIntegerv( GL_MAX_3D_TEXTURE_SIZE, &glConfig.max_3d_texture_size );
if( glConfig.max_3d_texture_size < 32 )
{
GL_SetExtension( GL_TEXTURE_3D_EXT, false );
MsgDev( D_ERROR, "GL_EXT_texture3D reported bogus GL_MAX_3D_TEXTURE_SIZE, disabled\n" );
}
}
GL_CheckExtension( "GL_SGIS_generate_mipmap", NULL, "gl_sgis_generate_mipmaps", GL_SGIS_MIPMAPS_EXT );
// hardware cubemaps
GL_CheckExtension( "GL_ARB_texture_cube_map", NULL, "gl_texture_cubemap", GL_TEXTURECUBEMAP_EXT );
if( GL_Support( GL_TEXTURECUBEMAP_EXT ))
{
pglGetIntegerv( GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB, &glConfig.max_cubemap_size );
// check for seamless cubemaps too
GL_CheckExtension( "GL_ARB_seamless_cube_map", NULL, "gl_seamless_cubemap", GL_ARB_SEAMLESS_CUBEMAP );
}
// point particles extension
GL_CheckExtension( "GL_EXT_point_parameters", pointparametersfunc, NULL, GL_EXT_POINTPARAMETERS );
GL_CheckExtension( "GL_ARB_texture_non_power_of_two", NULL, "gl_texture_npot", GL_ARB_TEXTURE_NPOT_EXT );
GL_CheckExtension( "GL_ARB_texture_compression", texturecompressionfuncs, "gl_dds_hardware_support", GL_TEXTURE_COMPRESSION_EXT );
GL_CheckExtension( "GL_EXT_compiled_vertex_array", compiledvertexarrayfuncs, "gl_cva_support", GL_CUSTOM_VERTEX_ARRAY_EXT );
if( !GL_Support( GL_CUSTOM_VERTEX_ARRAY_EXT ))
GL_CheckExtension( "GL_SGI_compiled_vertex_array", compiledvertexarrayfuncs, "gl_cva_support", GL_CUSTOM_VERTEX_ARRAY_EXT );
GL_CheckExtension( "GL_EXT_texture_edge_clamp", NULL, "gl_clamp_to_edge", GL_CLAMPTOEDGE_EXT );
if( !GL_Support( GL_CLAMPTOEDGE_EXT ))
GL_CheckExtension("GL_SGIS_texture_edge_clamp", NULL, "gl_clamp_to_edge", GL_CLAMPTOEDGE_EXT );
glConfig.max_texture_anisotropy = 0.0f;
GL_CheckExtension( "GL_EXT_texture_filter_anisotropic", NULL, "gl_ext_anisotropic_filter", GL_ANISOTROPY_EXT );
if( GL_Support( GL_ANISOTROPY_EXT ))
pglGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &glConfig.max_texture_anisotropy );
GL_CheckExtension( "GL_EXT_texture_lod_bias", NULL, "gl_ext_texture_lodbias", GL_TEXTURE_LODBIAS );
if( GL_Support( GL_TEXTURE_LODBIAS ))
pglGetFloatv( GL_MAX_TEXTURE_LOD_BIAS_EXT, &glConfig.max_texture_lodbias );
GL_CheckExtension( "GL_ARB_texture_border_clamp", NULL, "gl_ext_texborder_clamp", GL_CLAMP_TEXBORDER_EXT );
GL_CheckExtension( "GL_EXT_blend_minmax", blendequationfuncs, "gl_ext_customblend", GL_BLEND_MINMAX_EXT );
GL_CheckExtension( "GL_EXT_blend_subtract", blendequationfuncs, "gl_ext_customblend", GL_BLEND_SUBTRACT_EXT );
GL_CheckExtension( "glStencilOpSeparate", gl2separatestencilfuncs, "gl_separate_stencil", GL_SEPARATESTENCIL_EXT );
if( !GL_Support( GL_SEPARATESTENCIL_EXT ))
GL_CheckExtension("GL_ATI_separate_stencil", atiseparatestencilfuncs, "gl_separate_stencil", GL_SEPARATESTENCIL_EXT );
GL_CheckExtension( "GL_EXT_stencil_two_side", stenciltwosidefuncs, "gl_stenciltwoside", GL_STENCILTWOSIDE_EXT );
GL_CheckExtension( "GL_ARB_vertex_buffer_object", vbofuncs, "gl_vertex_buffer_object", GL_ARB_VERTEX_BUFFER_OBJECT_EXT );
// we don't care if it's an extension or not, they are identical functions, so keep it simple in the rendering code
#ifndef __ANDROID__
if( pglDrawRangeElementsEXT == NULL ) pglDrawRangeElementsEXT = pglDrawRangeElements;
#endif
GL_CheckExtension( "GL_ARB_texture_env_add", NULL, "gl_texture_env_add", GL_TEXTURE_ENV_ADD_EXT );
// vp and fp shaders
GL_CheckExtension( "GL_ARB_shader_objects", shaderobjectsfuncs, "gl_shaderobjects", GL_SHADER_OBJECTS_EXT );
GL_CheckExtension( "GL_ARB_shading_language_100", NULL, "gl_glslprogram", GL_SHADER_GLSL100_EXT );
GL_CheckExtension( "GL_ARB_vertex_shader", vertexshaderfuncs, "gl_vertexshader", GL_VERTEX_SHADER_EXT );
GL_CheckExtension( "GL_ARB_fragment_shader", NULL, "gl_pixelshader", GL_FRAGMENT_SHADER_EXT );
GL_CheckExtension( "GL_ARB_depth_texture", NULL, "gl_depthtexture", GL_DEPTH_TEXTURE );
GL_CheckExtension( "GL_ARB_shadow", NULL, "gl_arb_shadow", GL_SHADOW_EXT );
GL_CheckExtension( "GL_ARB_texture_float", NULL, "gl_arb_texture_float", GL_ARB_TEXTURE_FLOAT_EXT );
GL_CheckExtension( "GL_ARB_depth_buffer_float", NULL, "gl_arb_depth_float", GL_ARB_DEPTH_FLOAT_EXT );
// occlusion queries
GL_CheckExtension( "GL_ARB_occlusion_query", occlusionfunc, "gl_occlusion_queries", GL_OCCLUSION_QUERIES_EXT );
if( GL_Support( GL_SHADER_GLSL100_EXT ))
{
pglGetIntegerv( GL_MAX_TEXTURE_COORDS_ARB, &glConfig.max_texture_coords );
pglGetIntegerv( GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &glConfig.max_teximage_units );
}
else
{
// just get from multitexturing
glConfig.max_texture_coords = glConfig.max_teximage_units = glConfig.max_texture_units;
}
// rectangle textures support
if( Q_strstr( glConfig.extensions_string, "GL_NV_texture_rectangle" ))
{
glConfig.texRectangle = GL_TEXTURE_RECTANGLE_NV;
pglGetIntegerv( GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, &glConfig.max_2d_rectangle_size );
}
#ifndef __ANDROID__
else if( Q_strstr( glConfig.extensions_string, "GL_EXT_texture_rectangle" ))
{
glConfig.texRectangle = GL_TEXTURE_RECTANGLE_EXT;
pglGetIntegerv( GL_MAX_RECTANGLE_TEXTURE_SIZE_EXT, &glConfig.max_2d_rectangle_size );
}
#endif
else glConfig.texRectangle = glConfig.max_2d_rectangle_size = 0; // no rectangle
glConfig.max_2d_texture_size = 0;
pglGetIntegerv( GL_MAX_TEXTURE_SIZE, &glConfig.max_2d_texture_size );
if( glConfig.max_2d_texture_size <= 0 ) glConfig.max_2d_texture_size = 256;
Cvar_Get( "gl_max_texture_size", "0", CVAR_INIT, "opengl texture max dims" );
Cvar_Set( "gl_max_texture_size", va( "%i", glConfig.max_2d_texture_size ));
pglGetIntegerv( GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB, &glConfig.max_vertex_uniforms );
pglGetIntegerv( GL_MAX_VERTEX_ATTRIBS_ARB, &glConfig.max_vertex_attribs );
// MCD has buffering issues
if(Q_strstr( glConfig.renderer_string, "gdi" ))
Cvar_SetFloat( "gl_finish", 1 );
Cvar_Set( "gl_anisotropy", va( "%f", bound( 0, gl_texture_anisotropy->value, glConfig.max_texture_anisotropy )));
// software mipmap generator does wrong result with NPOT textures ...
if( !GL_Support( GL_SGIS_MIPMAPS_EXT ))
GL_SetExtension( GL_ARB_TEXTURE_NPOT_EXT, false );
if( GL_Support( GL_TEXTURE_COMPRESSION_EXT ))
Image_AddCmdFlags( IL_DDS_HARDWARE );
glw_state.initialized = true;
tr.framecount = tr.visframecount = 1;
}
