rename RageDisplay_OGL_Extensions -> RageDisplay_OGL_Helpers
This commit is contained in:
Glenn Maynard
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#include "global.h"
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#define __glext_h_
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#if defined(WIN32)
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#include <windows.h>
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#endif
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#include <set>
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#if !defined(MACOSX)
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# include <GL/gl.h>
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# include <GL/glu.h>
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#else
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# include <OpenGL/gl.h>
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# include <OpenGL/glu.h>
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#endif
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#undef __glext_h_
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#include "glext.h"
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#include "RageDisplay_OGL_Helpers.h"
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#include "RageLog.h"
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#include "RageUtil.h"
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#include "arch/LowLevelWindow/LowLevelWindow.h"
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GLExt_t GLExt;
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/* Available extensions: */
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static set<string> g_glExts;
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bool GLExt_t::HasExtension( const RString &sExt ) const
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{
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return g_glExts.find(sExt) != g_glExts.end();
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}
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#define F(n) { (void **) &GLExt.n , #n }
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struct func_t
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{
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void **p;
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const char *name;
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};
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static bool LoadAllOrNothing( struct func_t *funcs, LowLevelWindow *pWind )
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{
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bool bGotAll = true;
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for( unsigned i = 0; funcs[i].p != NULL; ++i )
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{
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*funcs[i].p = pWind->GetProcAddress( funcs[i].name );
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if( *funcs[i].p == NULL )
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{
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bGotAll = false;
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break;
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}
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}
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if( bGotAll )
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return true;
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/* If any function in the array wasn't found, clear them all. */
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for( unsigned i = 0; funcs[i].p != NULL; ++i )
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*funcs[i].p = NULL;
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return false;
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}
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static void GetGLExtensions( set<string> &ext )
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{
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const char *szBuf = (const char *) glGetString( GL_EXTENSIONS );
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vector<RString> asList;
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split( szBuf, " ", asList );
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for( unsigned i = 0; i < asList.size(); ++i )
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ext.insert( asList[i] );
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}
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void GLExt_t::Load( LowLevelWindow *pWind )
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{
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memset( this, 0, sizeof(*this) );
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GetGLExtensions( g_glExts );
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m_bARB_texture_env_combine = HasExtension("GL_ARB_texture_env_combine");
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m_bEXT_texture_env_combine = HasExtension("GL_EXT_texture_env_combine");
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m_bGL_EXT_bgra = HasExtension("GL_EXT_bgra");
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#if defined(WIN32)
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if( HasExtension("WGL_EXT_swap_control") )
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wglSwapIntervalEXT = (PWSWAPINTERVALEXTPROC) pWind->GetProcAddress("wglSwapIntervalEXT");
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#endif
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if( HasExtension("GL_EXT_paletted_texture") )
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{
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glColorTableEXT = (PFNGLCOLORTABLEPROC) pWind->GetProcAddress("glColorTableEXT");
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glGetColorTableParameterivEXT = (PFNGLCOLORTABLEPARAMETERIVPROC) pWind->GetProcAddress("glGetColorTableParameterivEXT");
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}
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if( HasExtension("GL_ARB_multitexture") )
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glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC) pWind->GetProcAddress("glActiveTextureARB");
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/*
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* Find extension functions.
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*
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* X11R6.7.0 (or possibly ATI's drivers) seem to be returning bogus values for glBindBufferARB
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* if we don't actually check for GL_ARB_vertex_buffer_object.
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* https://sf.net/tracker/download.php?group_id=37892&atid=421366&file_id=88086&aid=958820
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* https://sf.net/tracker/download.php?group_id=37892&atid=421366&file_id=85542&aid=944836
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*
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* Let's check them all, to be safe.
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*/
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if( HasExtension("GL_ARB_vertex_buffer_object") )
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{
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func_t funcs[] = {
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F( glGenBuffersARB ),
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F( glBindBufferARB ),
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F( glBufferDataARB ),
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F( glBufferSubDataARB ),
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F( glDeleteBuffersARB ),
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{ NULL, NULL },
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};
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LoadAllOrNothing( funcs, pWind );
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}
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if( HasExtension("GL_EXT_draw_range_elements") )
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GLExt.glDrawRangeElements = (PFNGLDRAWRANGEELEMENTSPROC) pWind->GetProcAddress("glDrawRangeElements");
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m_bGL_ARB_shader_objects = HasExtension("GL_ARB_shader_objects");
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if( m_bGL_ARB_shader_objects )
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{
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func_t funcs[] = {
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F( glCreateShaderObjectARB ),
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F( glCreateShaderObjectARB ),
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F( glCreateProgramObjectARB ),
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F( glShaderSourceARB ),
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F( glCompileShaderARB ),
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F( glGetObjectParameterfvARB ),
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F( glGetObjectParameterivARB ),
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F( glGetInfoLogARB ),
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F( glAttachObjectARB ),
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F( glDeleteObjectARB ),
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F( glLinkProgramARB ),
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F( glUseProgramObjectARB ),
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F( glVertexAttrib2fARB ),
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F( glVertexAttrib3fARB ),
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F( glVertexAttrib4fARB ),
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F( glEnableVertexAttribArrayARB ),
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F( glDisableVertexAttribArrayARB ),
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F( glVertexAttribPointerARB ),
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{ NULL, NULL }
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};
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if( !LoadAllOrNothing(funcs, pWind) )
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m_bGL_ARB_shader_objects = false;
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}
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m_bGL_ARB_vertex_shader = m_bGL_ARB_shader_objects && HasExtension("GL_ARB_vertex_shader");
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if( m_bGL_ARB_vertex_shader )
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{
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func_t funcs[] =
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{
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F( glBindAttribLocationARB ),
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{ NULL, NULL }
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};
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if( !LoadAllOrNothing(funcs, pWind) )
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m_bGL_ARB_vertex_shader = false;
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}
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m_bGL_ARB_shading_language_100 = HasExtension("GL_ARB_shading_language_100");
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if( m_bGL_ARB_shading_language_100 )
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{
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while( glGetError() != GL_NO_ERROR )
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;
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const char *pzVersion = (const char *) glGetString( GL_SHADING_LANGUAGE_VERSION );
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GLenum glError = glGetError();
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if( glError == GL_INVALID_ENUM )
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{
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LOG->Info( "No GL_SHADING_LANGUAGE_VERSION; assuming 1.0" );
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m_iShadingLanguageVersion = 100;
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}
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else
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{
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const float fVersion = StringToFloat( pzVersion );
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m_iShadingLanguageVersion = int(roundf(fVersion * 100));
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/* The version string may contain extra information beyond the version number. */
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LOG->Info( "OpenGL shading language: %s", pzVersion );
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}
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}
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}
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/*
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* Copyright (c) 2002-2005 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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