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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/Unix/GlxExtensions.hpp>
#include <SFML/Window/Context.hpp>
#include <cstdlib>
#include <cstring>
#include <cstddef>
static sf::GlFunctionPointer IntGetProcAddress(const char* name)
{
return sf::Context::getFunction(name);
}
int sfglx_ext_EXT_swap_control = sfglx_LOAD_FAILED;
int sfglx_ext_MESA_swap_control = sfglx_LOAD_FAILED;
int sfglx_ext_SGI_swap_control = sfglx_LOAD_FAILED;
int sfglx_ext_ARB_multisample = sfglx_LOAD_FAILED;
int sfglx_ext_ARB_create_context = sfglx_LOAD_FAILED;
int sfglx_ext_ARB_create_context_profile = sfglx_LOAD_FAILED;
void (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalEXT)(Display *, GLXDrawable, int) = NULL;
static int Load_EXT_swap_control(void)
{
int numFailed = 0;
sf_ptrc_glXSwapIntervalEXT = (void (CODEGEN_FUNCPTR *)(Display *, GLXDrawable, int))IntGetProcAddress("glXSwapIntervalEXT");
if(!sf_ptrc_glXSwapIntervalEXT) numFailed++;
return numFailed;
}
int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalMESA)(int) = NULL;
static int Load_MESA_swap_control(void)
{
int numFailed = 0;
sf_ptrc_glXSwapIntervalMESA = (int (CODEGEN_FUNCPTR *)(int))IntGetProcAddress("glXSwapIntervalMESA");
if(!sf_ptrc_glXSwapIntervalMESA) numFailed++;
return numFailed;
}
int (CODEGEN_FUNCPTR *sf_ptrc_glXSwapIntervalSGI)(int) = NULL;
static int Load_SGI_swap_control(void)
{
int numFailed = 0;
sf_ptrc_glXSwapIntervalSGI = (int (CODEGEN_FUNCPTR *)(int))IntGetProcAddress("glXSwapIntervalSGI");
if(!sf_ptrc_glXSwapIntervalSGI) numFailed++;
return numFailed;
}
GLXContext (CODEGEN_FUNCPTR *sf_ptrc_glXCreateContextAttribsARB)(Display *, GLXFBConfig, GLXContext, Bool, const int *) = NULL;
static int Load_ARB_create_context(void)
{
int numFailed = 0;
sf_ptrc_glXCreateContextAttribsARB = (GLXContext (CODEGEN_FUNCPTR *)(Display *, GLXFBConfig, GLXContext, Bool, const int *))IntGetProcAddress("glXCreateContextAttribsARB");
if(!sf_ptrc_glXCreateContextAttribsARB) numFailed++;
return numFailed;
}
typedef int (*PFN_LOADFUNCPOINTERS)(void);
typedef struct sfglx_StrToExtMap_s
{
const char *extensionName;
int *extensionVariable;
PFN_LOADFUNCPOINTERS LoadExtension;
} sfglx_StrToExtMap;
static sfglx_StrToExtMap ExtensionMap[6] = {
{"GLX_EXT_swap_control", &sfglx_ext_EXT_swap_control, Load_EXT_swap_control},
{"GLX_MESA_swap_control", &sfglx_ext_MESA_swap_control, Load_MESA_swap_control},
{"GLX_SGI_swap_control", &sfglx_ext_SGI_swap_control, Load_SGI_swap_control},
{"GLX_ARB_multisample", &sfglx_ext_ARB_multisample, NULL},
{"GLX_ARB_create_context", &sfglx_ext_ARB_create_context, Load_ARB_create_context},
{"GLX_ARB_create_context_profile", &sfglx_ext_ARB_create_context_profile, NULL},
};
static int g_extensionMapSize = 6;
static sfglx_StrToExtMap *FindExtEntry(const char *extensionName)
{
int loop;
sfglx_StrToExtMap *currLoc = ExtensionMap;
for(loop = 0; loop < g_extensionMapSize; ++loop, ++currLoc)
{
if(strcmp(extensionName, currLoc->extensionName) == 0)
return currLoc;
}
return NULL;
}
static void ClearExtensionVars(void)
{
sfglx_ext_EXT_swap_control = sfglx_LOAD_FAILED;
sfglx_ext_MESA_swap_control = sfglx_LOAD_FAILED;
sfglx_ext_SGI_swap_control = sfglx_LOAD_FAILED;
sfglx_ext_ARB_multisample = sfglx_LOAD_FAILED;
sfglx_ext_ARB_create_context = sfglx_LOAD_FAILED;
sfglx_ext_ARB_create_context_profile = sfglx_LOAD_FAILED;
}
static void LoadExtByName(const char *extensionName)
{
sfglx_StrToExtMap *entry = NULL;
entry = FindExtEntry(extensionName);
if(entry)
{
if(entry->LoadExtension)
{
int numFailed = entry->LoadExtension();
if(numFailed == 0)
{
*(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED;
}
else
{
*(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED + numFailed;
}
}
else
{
*(entry->extensionVariable) = sfglx_LOAD_SUCCEEDED;
}
}
}
static void ProcExtsFromExtString(const char *strExtList)
{
size_t iExtListLen = strlen(strExtList);
const char *strExtListEnd = strExtList + iExtListLen;
const char *strCurrPos = strExtList;
char strWorkBuff[256];
while(*strCurrPos)
{
/*Get the extension at our position.*/
int iStrLen = 0;
const char *strEndStr = strchr(strCurrPos, ' ');
int iStop = 0;
if(strEndStr == NULL)
{
strEndStr = strExtListEnd;
iStop = 1;
}
iStrLen = (int)((ptrdiff_t)strEndStr - (ptrdiff_t)strCurrPos);
if(iStrLen > 255)
return;
strncpy(strWorkBuff, strCurrPos, iStrLen);
strWorkBuff[iStrLen] = '\0';
LoadExtByName(strWorkBuff);
strCurrPos = strEndStr + 1;
if(iStop) break;
}
}
int sfglx_LoadFunctions(Display *display, int screen)
{
ClearExtensionVars();
ProcExtsFromExtString((const char *)glXQueryExtensionsString(display, screen));
return sfglx_LOAD_SUCCEEDED;
}
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