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//========= Copyright Valve Corporation, All rights reserved. ============//
// TOGL CODE LICENSE
//
// Copyright 2011-2014 Valve Corporation
// All Rights Reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// glentrypoints.cpp
//
//=============================================================================//
// Immediately include gl.h, etc. here to avoid compilation warnings.
# include "togl/rendermechanism.h"
# include "appframework/AppFramework.h"
# include "appframework/IAppSystemGroup.h"
# include "tier0/dbg.h"
# include "tier0/icommandline.h"
# include "tier0/platform.h"
# include "interface.h"
# include "filesystem.h"
# include "filesystem_init.h"
# include "tier1/convar.h"
# include "vstdlib/cvar.h"
# include "inputsystem/ButtonCode.h"
# include "tier1.h"
# include "tier2/tier2.h"
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# ifdef _LINUX
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# include <GL/glx.h>
# endif
// NOTE: This has to be the last file included!
# include "tier0/memdbgon.h"
# if !defined(DX_TO_GL_ABSTRACTION)
# error
# endif
# if defined(OSX) || defined(LINUX) || (defined (WIN32) && defined( DX_TO_GL_ABSTRACTION ))
# include "appframework/ilaunchermgr.h"
ILauncherMgr * g_pLauncherMgr = NULL ;
# endif
# define DEBUG_ALL_GLCALLS 0
# if DEBUG_ALL_GLCALLS
bool g_bDebugOpenGLCalls = true ;
bool g_bPrintOpenGLCalls = false ;
# define GL_EXT(x,glmajor,glminor)
# define GL_FUNC(ext,req,ret,fn,arg,call) \
static ret ( * fn # # _gldebugptr ) arg = NULL ; \
static ret fn # # _gldebug arg { \
if ( ! g_bDebugOpenGLCalls ) { return fn # # _gldebugptr call ; } \
if ( g_bPrintOpenGLCalls ) { \
printf ( " Calling %s ... " , # fn ) ; \
fflush ( stdout ) ; \
} \
ret retval = fn # # _gldebugptr call ; \
if ( g_bPrintOpenGLCalls ) { \
printf ( " %s returned! \n " , # fn ) ; \
fflush ( stdout ) ; \
} \
const GLenum err = glGetError_gldebugptr ( ) ; \
if ( err = = GL_INVALID_FRAMEBUFFER_OPERATION_EXT ) { \
const GLenum fberr = gGL - > glCheckFramebufferStatus ( GL_FRAMEBUFFER_EXT ) ; \
printf ( " %s triggered error GL_INVALID_FRAMEBUFFER_OPERATION_EXT! (0x%X) \n \n \n " , # fn , ( int ) fberr ) ; \
fflush ( stdout ) ; \
__asm__ __volatile__ ( " int $3 \n \t " ) ; \
} else if ( err ! = GL_NO_ERROR ) { \
printf ( " %s triggered error 0x%X! \n \n \n " , # fn , ( int ) err ) ; \
fflush ( stdout ) ; \
__asm__ __volatile__ ( " int $3 \n \t " ) ; \
} \
return retval ; \
}
# define GL_FUNC_VOID(ext,req,fn,arg,call) \
static void ( * fn # # _gldebugptr ) arg = NULL ; \
static void fn # # _gldebug arg { \
if ( ! g_bDebugOpenGLCalls ) { fn # # _gldebugptr call ; return ; } \
if ( g_bPrintOpenGLCalls ) { \
printf ( " Calling %s ... " , # fn ) ; \
fflush ( stdout ) ; \
} \
fn # # _gldebugptr call ; \
if ( g_bPrintOpenGLCalls ) { \
printf ( " %s returned! \n " , # fn ) ; \
fflush ( stdout ) ; \
} \
const GLenum err = glGetError_gldebugptr ( ) ; \
if ( err = = GL_INVALID_FRAMEBUFFER_OPERATION_EXT ) { \
const GLenum fberr = gGL - > glCheckFramebufferStatus ( GL_FRAMEBUFFER_EXT ) ; \
printf ( " %s triggered error GL_INVALID_FRAMEBUFFER_OPERATION_EXT! (0x%X) \n \n \n " , # fn , ( int ) fberr ) ; \
fflush ( stdout ) ; \
__asm__ __volatile__ ( " int $3 \n \t " ) ; \
} else if ( err ! = GL_NO_ERROR ) { \
printf ( " %s triggered error 0x%X! \n \n \n " , # fn , ( int ) err ) ; \
fflush ( stdout ) ; \
__asm__ __volatile__ ( " int $3 \n \t " ) ; \
} \
}
# include "togl/glfuncs.inl"
# undef GL_FUNC_VOID
# undef GL_FUNC
# undef GL_EXT
# endif
COpenGLEntryPoints * gGL = NULL ;
GL_GetProcAddressCallbackFunc_t gGL_GetProcAddressCallback = NULL ;
void * VoidFnPtrLookup_GlMgr ( const char * fn , bool & okay , const bool bRequired , void * fallback )
{
void * retval = NULL ;
if ( ( ! okay ) & & ( ! bRequired ) ) // always look up if required (so we get a complete list of crucial missing symbols).
return NULL ;
// SDL does the right thing, so we never need to use tier0 in this case.
retval = ( * gGL_GetProcAddressCallback ) ( fn , okay , bRequired , fallback ) ;
//printf("CDynamicFunctionOpenGL: SDL_GL_GetProcAddress(\"%s\") returned %p\n", fn, retval);
if ( ( retval = = NULL ) & & ( fallback ! = NULL ) )
{
//printf("CDynamicFunctionOpenGL: Using fallback %p for \"%s\"\n", fallback, fn);
retval = fallback ;
}
// Note that a non-NULL response doesn't mean it's safe to call the function!
// You always have to check that the extension is supported;
// an implementation MAY return NULL in this case, but it doesn't have to (and doesn't, with the DRI drivers).
okay = ( okay & & ( retval ! = NULL ) ) ;
if ( bRequired & & ! okay )
fprintf ( stderr , " Could not find required OpenGL entry point '%s'! \n " , fn ) ;
return retval ;
}
COpenGLEntryPoints * GetOpenGLEntryPoints ( GL_GetProcAddressCallbackFunc_t callback )
{
if ( gGL = = NULL )
{
gGL_GetProcAddressCallback = callback ;
gGL = new COpenGLEntryPoints ( ) ;
if ( ! gGL - > m_bHave_OpenGL )
Error ( " Missing basic required OpenGL functionality. " ) ;
}
return gGL ;
}
void ClearOpenGLEntryPoints ( )
{
if ( gGL )
{
gGL - > ClearEntryPoints ( ) ;
}
}
COpenGLEntryPoints * ToGLConnectLibraries ( CreateInterfaceFn factory )
{
ConnectTier1Libraries ( & factory , 1 ) ;
ConVar_Register ( ) ;
ConnectTier2Libraries ( & factory , 1 ) ;
if ( ! g_pFullFileSystem )
{
Warning ( " ToGL was unable to access the required interfaces! \n " ) ;
}
// NOTE! : Overbright is 1.0 so that Hammer will work properly with the white bumped and unbumped lightmaps.
MathLib_Init ( 2.2f , 2.2f , 0.0f , 2.0f ) ;
# if defined( USE_SDL )
g_pLauncherMgr = ( ILauncherMgr * ) factory ( SDLMGR_INTERFACE_VERSION , NULL ) ;
# endif
return gGL ;
}
void ToGLDisconnectLibraries ( )
{
DisconnectTier2Libraries ( ) ;
ConVar_Unregister ( ) ;
DisconnectTier1Libraries ( ) ;
}
# define GLVERNUM(Major, Minor, Patch) (((Major) * 100000) + ((Minor) * 1000) + (Patch))
static void GetOpenGLVersion ( int * major , int * minor , int * patch )
{
* major = * minor = * patch = 0 ;
static CDynamicFunctionOpenGL < true , const GLubyte * ( APIENTRY * ) ( GLenum name ) , const GLubyte * > glGetString ( " glGetString " ) ;
if ( glGetString )
{
const char * version = ( const char * ) glGetString ( GL_VERSION ) ;
if ( version )
{
sscanf ( version , " %d.%d.%d " , major , minor , patch ) ;
}
}
}
static int GetOpenGLVersionMajor ( )
{
int major , minor , patch ;
GetOpenGLVersion ( & major , & minor , & patch ) ;
return major ;
}
static int GetOpenGLVersionMinor ( )
{
int major , minor , patch ;
GetOpenGLVersion ( & major , & minor , & patch ) ;
return minor ;
}
static int GetOpenGLVersionPatch ( )
{
int major , minor , patch ;
GetOpenGLVersion ( & major , & minor , & patch ) ;
return patch ;
}
static bool CheckBaseOpenGLVersion ( )
{
const int NEED_MAJOR = 2 ;
const int NEED_MINOR = 0 ;
const int NEED_PATCH = 0 ;
int major , minor , patch ;
GetOpenGLVersion ( & major , & minor , & patch ) ;
const int need = GLVERNUM ( NEED_MAJOR , NEED_MINOR , NEED_PATCH ) ;
const int have = GLVERNUM ( major , minor , patch ) ;
if ( have < need )
{
fprintf ( stderr , " PROBLEM: You appear to have OpenGL %d.%d.%d, but we need at least %d.%d.%d! \n " ,
major , minor , patch , NEED_MAJOR , NEED_MINOR , NEED_PATCH ) ;
return false ;
}
return true ;
}
static bool CheckOpenGLExtension_internal ( const char * ext , const int coremajor , const int coreminor )
{
if ( ( coremajor > = 0 ) & & ( coreminor > = 0 ) ) // we know that this extension is part of the base spec as of GL_VERSION coremajor.coreminor.
{
int major , minor , patch ;
GetOpenGLVersion ( & major , & minor , & patch ) ;
const int need = GLVERNUM ( coremajor , coreminor , 0 ) ;
const int have = GLVERNUM ( major , minor , patch ) ;
if ( have > = need )
return true ; // we definitely have access to this "extension," as it is part of this version of the GL's core functionality.
}
// okay, see if the GL_EXTENSIONS string reports it.
static CDynamicFunctionOpenGL < true , const GLubyte * ( APIENTRY * ) ( GLenum name ) , const GLubyte * > glGetString ( " glGetString " ) ;
if ( ! glGetString )
return false ;
// hacky scanning of this string, because I don't want to spend time breaking it into a vector like I should have.
const char * extensions = ( const char * ) glGetString ( GL_EXTENSIONS ) ;
const size_t extlen = strlen ( ext ) ;
while ( ( extensions ) & & ( * extensions ) )
{
const char * ptr = strstr ( extensions , ext ) ;
# if _WIN32
if ( ! ptr )
{
static CDynamicFunctionOpenGL < true , const char * ( APIENTRY * ) ( ) , const char * > wglGetExtensionsStringEXT ( " wglGetExtensionsStringEXT " ) ;
if ( wglGetExtensionsStringEXT )
{
extensions = wglGetExtensionsStringEXT ( ) ;
ptr = strstr ( extensions , ext ) ;
}
if ( ! ptr )
{
return false ;
}
}
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# elif !defined ( OSX )
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if ( ! ptr )
{
static CDynamicFunctionOpenGL < true , Display * ( APIENTRY * ) ( ) , Display * > glXGetCurrentDisplay ( " glXGetCurrentDisplay " ) ;
static CDynamicFunctionOpenGL < true , const char * ( APIENTRY * ) ( Display * , int ) , const char * > glXQueryExtensionsString ( " glXQueryExtensionsString " ) ;
if ( glXQueryExtensionsString & & glXGetCurrentDisplay )
{
extensions = glXQueryExtensionsString ( glXGetCurrentDisplay ( ) , 0 ) ;
ptr = strstr ( extensions , ext ) ;
}
}
# endif
if ( ! ptr )
return false ;
// make sure this matches the entire string, and isn't a substring match of some other extension.
// if ( ( (string is at start of extension list) or (the char before the string is a space) ) and
// (the next char after the string is a space or a null terminator) )
if ( ( ( ptr = = extensions ) | | ( ptr [ - 1 ] = = ' ' ) ) & &
( ( ptr [ extlen ] = = ' ' ) | | ( ptr [ extlen ] = = ' \0 ' ) ) )
return true ; // found it!
extensions = ptr + extlen ; // skip ahead, search again.
}
return false ;
}
static bool CheckOpenGLExtension ( const char * ext , const int coremajor , const int coreminor )
{
const bool retval = CheckOpenGLExtension_internal ( ext , coremajor , coreminor ) ;
printf ( " This system %s the OpenGL extension %s. \n " , retval ? " supports " : " DOES NOT support " , ext ) ;
return retval ;
}
// The GL context you want entry points for must be current when you hit this constructor!
COpenGLEntryPoints : : COpenGLEntryPoints ( )
: m_nTotalGLCycles ( 0 )
, m_nTotalGLCalls ( 0 )
, m_nOpenGLVersionMajor ( GetOpenGLVersionMajor ( ) )
, m_nOpenGLVersionMinor ( GetOpenGLVersionMinor ( ) )
, m_nOpenGLVersionPatch ( GetOpenGLVersionPatch ( ) )
, m_bHave_OpenGL ( CheckBaseOpenGLVersion ( ) ) // may reset to false as these lookups happen.
# define GL_EXT(x,glmajor,glminor) , m_bHave_##x(CheckOpenGLExtension(#x, glmajor, glminor))
# define GL_FUNC(ext,req,ret,fn,arg,call) , fn(#fn, m_bHave_##ext)
# define GL_FUNC_VOID(ext,req,fn,arg,call) , fn(#fn, m_bHave_##ext)
# include "togl/glfuncs.inl"
# undef GL_FUNC_VOID
# undef GL_FUNC
# undef GL_EXT
{
// Locally cache the copy of the GL device strings, to avoid needing to call these glGet's (which can be extremely slow) more than once.
const char * pszString = ( const char * ) glGetString ( GL_VENDOR ) ;
m_pGLDriverStrings [ cGLVendorString ] = strdup ( pszString ? pszString : " " ) ;
m_nDriverProvider = cGLDriverProviderUnknown ;
if ( V_stristr ( m_pGLDriverStrings [ cGLVendorString ] , " nvidia " ) )
m_nDriverProvider = cGLDriverProviderNVIDIA ;
else if ( V_stristr ( m_pGLDriverStrings [ cGLVendorString ] , " amd " ) | | V_stristr ( m_pGLDriverStrings [ cGLVendorString ] , " ati " ) )
m_nDriverProvider = cGLDriverProviderAMD ;
else if ( V_stristr ( m_pGLDriverStrings [ cGLVendorString ] , " intel " ) )
m_nDriverProvider = cGLDriverProviderIntelOpenSource ;
else if ( V_stristr ( m_pGLDriverStrings [ cGLVendorString ] , " apple " ) )
m_nDriverProvider = cGLDriverProviderApple ;
pszString = ( const char * ) glGetString ( GL_RENDERER ) ;
m_pGLDriverStrings [ cGLRendererString ] = strdup ( pszString ? pszString : " " ) ;
pszString = ( const char * ) glGetString ( GL_VERSION ) ;
m_pGLDriverStrings [ cGLVersionString ] = strdup ( pszString ? pszString : " " ) ;
pszString = ( const char * ) glGetString ( GL_EXTENSIONS ) ;
m_pGLDriverStrings [ cGLExtensionsString ] = strdup ( pszString ? pszString : " " ) ;
printf ( " OpenGL: %s %s (%d.%d.%d) \n " , m_pGLDriverStrings [ cGLRendererString ] , m_pGLDriverStrings [ cGLVersionString ] ,
m_nOpenGLVersionMajor , m_nOpenGLVersionMinor , m_nOpenGLVersionPatch ) ;
// !!! FIXME: Alfred says the original GL_APPLE_fence code only exists to
// !!! FIXME: hint Apple's drivers and not because we rely on the
// !!! FIXME: functionality. If so, just remove this check (and the
// !!! FIXME: GL_NV_fence code entirely).
if ( ( m_bHave_OpenGL ) & & ( ( ! m_bHave_GL_NV_fence ) & & ( ! m_bHave_GL_ARB_sync ) & & ( ! m_bHave_GL_APPLE_fence ) ) )
{
Error ( " Required OpenGL extension \" GL_NV_fence \" , \" GL_ARB_sync \" , or \" GL_APPLE_fence \" is not supported. Please upgrade your OpenGL driver. " ) ;
}
// same extension, different name.
if ( m_bHave_GL_EXT_vertex_array_bgra | | m_bHave_GL_ARB_vertex_array_bgra )
{
m_bHave_GL_EXT_vertex_array_bgra = m_bHave_GL_ARB_vertex_array_bgra = true ;
}
// GL_ARB_framebuffer_object is a superset of GL_EXT_framebuffer_object,
// (etc) but if you don't call in through the ARB entry points, you won't
// get the relaxed restrictions on mismatched attachment dimensions.
if ( m_bHave_GL_ARB_framebuffer_object )
{
m_bHave_GL_EXT_framebuffer_object = true ;
m_bHave_GL_EXT_framebuffer_blit = true ;
m_bHave_GL_EXT_framebuffer_multisample = true ;
glBindFramebufferEXT . Force ( glBindFramebuffer . Pointer ( ) ) ;
glBindRenderbufferEXT . Force ( glBindRenderbuffer . Pointer ( ) ) ;
glCheckFramebufferStatusEXT . Force ( glCheckFramebufferStatus . Pointer ( ) ) ;
glDeleteRenderbuffersEXT . Force ( glDeleteRenderbuffers . Pointer ( ) ) ;
glFramebufferRenderbufferEXT . Force ( glFramebufferRenderbuffer . Pointer ( ) ) ;
glFramebufferTexture2DEXT . Force ( glFramebufferTexture2D . Pointer ( ) ) ;
glFramebufferTexture3DEXT . Force ( glFramebufferTexture3D . Pointer ( ) ) ;
glGenFramebuffersEXT . Force ( glGenFramebuffers . Pointer ( ) ) ;
glGenRenderbuffersEXT . Force ( glGenRenderbuffers . Pointer ( ) ) ;
glDeleteFramebuffersEXT . Force ( glDeleteFramebuffers . Pointer ( ) ) ;
glBlitFramebufferEXT . Force ( glBlitFramebuffer . Pointer ( ) ) ;
glRenderbufferStorageMultisampleEXT . Force ( glRenderbufferStorageMultisample . Pointer ( ) ) ;
}
# if DEBUG_ALL_GLCALLS
// push all GL calls through the debug wrappers.
# define GL_EXT(x,glmajor,glminor)
# define GL_FUNC(ext,req,ret,fn,arg,call) \
fn # # _gldebugptr = this - > fn ; \
this - > fn . Force ( fn # # _gldebug ) ;
# define GL_FUNC_VOID(ext,req,fn,arg,call) \
fn # # _gldebugptr = this - > fn ; \
this - > fn . Force ( fn # # _gldebug ) ;
# include "togl/glfuncs.inl"
# undef GL_FUNC_VOID
# undef GL_FUNC
# undef GL_EXT
# endif
# ifdef OSX
m_bHave_GL_NV_bindless_texture = false ;
m_bHave_GL_AMD_pinned_memory = false ;
# else
if ( ( m_bHave_GL_NV_bindless_texture ) & & ( ! CommandLine ( ) - > CheckParm ( " -gl_nv_bindless_texturing " ) ) )
{
m_bHave_GL_NV_bindless_texture = false ;
glGetTextureHandleNV . Force ( NULL ) ;
glGetTextureSamplerHandleNV . Force ( NULL ) ;
glMakeTextureHandleResidentNV . Force ( NULL ) ;
glMakeTextureHandleNonResidentNV . Force ( NULL ) ;
glUniformHandleui64NV . Force ( NULL ) ;
glUniformHandleui64vNV . Force ( NULL ) ;
glProgramUniformHandleui64NV . Force ( NULL ) ;
glProgramUniformHandleui64vNV . Force ( NULL ) ;
glIsTextureHandleResidentNV . Force ( NULL ) ;
}
if ( ! CommandLine ( ) - > CheckParm ( " -gl_amd_pinned_memory " ) )
{
m_bHave_GL_AMD_pinned_memory = false ;
}
# endif // !OSX
// Getting reports of black screens, etc. with ARB_buffer_storage and AMD drivers. This type of thing:
// http://forums.steampowered.com/forums/showthread.php?t=3266806
// So disable it for now.
if ( ( m_nDriverProvider = = cGLDriverProviderAMD ) | | CommandLine ( ) - > CheckParm ( " -gl_disable_arb_buffer_storage " ) )
{
m_bHave_GL_ARB_buffer_storage = false ;
}
printf ( " GL_NV_bindless_texture: %s \n " , m_bHave_GL_NV_bindless_texture ? " ENABLED " : " DISABLED " ) ;
printf ( " GL_AMD_pinned_memory: %s \n " , m_bHave_GL_AMD_pinned_memory ? " ENABLED " : " DISABLED " ) ;
printf ( " GL_ARB_buffer_storage: %s \n " , m_bHave_GL_ARB_buffer_storage ? " AVAILABLE " : " NOT AVAILABLE " ) ;
printf ( " GL_EXT_texture_sRGB_decode: %s \n " , m_bHave_GL_EXT_texture_sRGB_decode ? " AVAILABLE " : " NOT AVAILABLE " ) ;
bool bGLCanDecodeS3TCTextures = m_bHave_GL_EXT_texture_compression_s3tc | | ( m_bHave_GL_EXT_texture_compression_dxt1 & & m_bHave_GL_ANGLE_texture_compression_dxt3 & & m_bHave_GL_ANGLE_texture_compression_dxt5 ) ;
if ( ! bGLCanDecodeS3TCTextures )
{
Error ( " This application requires either the GL_EXT_texture_compression_s3tc, or the GL_EXT_texture_compression_dxt1 + GL_ANGLE_texture_compression_dxt3 + GL_ANGLE_texture_compression_dxt5 OpenGL extensions. Please install S3TC texture support. \n " ) ;
}
# ifdef OSX
if ( CommandLine ( ) - > FindParm ( " -glmnosrgbdecode " ) )
{
Msg ( " Forcing m_bHave_GL_EXT_texture_sRGB_decode off. \n " ) ;
m_bHave_GL_EXT_texture_sRGB_decode = false ;
}
# endif
# ifndef OSX
if ( ! m_bHave_GL_EXT_texture_sRGB_decode )
{
Error ( " Required OpenGL extension \" GL_EXT_texture_sRGB_decode \" is not supported. Please update your OpenGL driver. \n " ) ;
}
# endif
}
COpenGLEntryPoints : : ~ COpenGLEntryPoints ( )
{
for ( uint i = 0 ; i < cGLTotalDriverProviders ; + + i )
{
free ( m_pGLDriverStrings [ i ] ) ;
m_pGLDriverStrings [ i ] = NULL ;
}
}
void COpenGLEntryPoints : : ClearEntryPoints ( )
{
# define GL_EXT(x,glmajor,glminor)
# define GL_FUNC(ext,req,ret,fn,arg,call) fn.Force( NULL );
# define GL_FUNC_VOID(ext,req,fn,arg,call) fn.Force( NULL );
# include "togl/glfuncs.inl"
# undef GL_FUNC_VOID
# undef GL_FUNC
# undef GL_EXT
}
// Turn off memdbg macros (turned on up top) since this is included like a header
# include "tier0/memdbgoff.h"