FGFS-4.1/OpenSceneGraph
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Added support for per context extension string.

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Note, this required adding a unsigned int context ID to the osg::isGLUExtensionSupported(,)
and osg::isGLExtensionSupported(,) functions.  This may require reimplementation
of end user code to accomodate the new calling convention.
This commit is contained in:
Robert Osfield
2005-04-26 13:15:27 +00:00
parent 59ebf86dd0
commit a1bda0dab8
35 changed files with 191 additions and 162 deletions
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83
src/osg/GLExtensions.cpp
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@@ -14,7 +14,7 @@
#include <osg/GL>
#include <osg/GLU>
#include <osg/Notify>
#include <osg/buffered_value>
#include <stdlib.h>
#include <string.h>
@@ -24,30 +24,42 @@
#include <vector>
#include <set>
bool osg::isGLExtensionSupported(const char *extension)
bool osg::isGLExtensionSupported(unsigned int contextID, const char *extension)
{
typedef std::set<std::string> ExtensionSet;
static ExtensionSet s_extensionSet;
static const char* s_extensions = NULL;
if (s_extensions==NULL)
static osg::buffered_object<ExtensionSet> s_extensionSetList;
static osg::buffered_object<std::string> s_rendererList;
static osg::buffered_value<int> s_initializedList;
ExtensionSet& extensionSet = s_extensionSetList[contextID];
std::string& rendererString = s_rendererList[contextID];
// if not already set up, initialize all the per graphic context values.
if (!s_initializedList[contextID])
{
s_initializedList[contextID] = 1;
// set up the renderer
const GLubyte* renderer = glGetString(GL_RENDERER);
rendererString = renderer ? (const char*)renderer : "";
// get the extension list from OpenGL.
s_extensions = (const char*)glGetString(GL_EXTENSIONS);
if (s_extensions==NULL) return false;
const char* extensions = (const char*)glGetString(GL_EXTENSIONS);
if (extensions==NULL) return false;
// insert the ' ' delimiated extensions words into the extensionSet.
const char *startOfWord = s_extensions;
const char *startOfWord = extensions;
const char *endOfWord;
while ((endOfWord = strchr(startOfWord,' '))!=NULL)
{
s_extensionSet.insert(std::string(startOfWord,endOfWord));
extensionSet.insert(std::string(startOfWord,endOfWord));
startOfWord = endOfWord+1;
}
if (*startOfWord!=0) s_extensionSet.insert(std::string(startOfWord));
if (*startOfWord!=0) extensionSet.insert(std::string(startOfWord));
osg::notify(INFO)<<"OpenGL extensions supported by installed OpenGL drivers are:"<<std::endl;
for(ExtensionSet::iterator itr=s_extensionSet.begin();
itr!=s_extensionSet.end();
for(ExtensionSet::iterator itr=extensionSet.begin();
itr!=extensionSet.end();
++itr)
{
osg::notify(INFO)<<" "<<*itr<<std::endl;
@@ -56,20 +68,17 @@ bool osg::isGLExtensionSupported(const char *extension)
}
// true if extension found in extensionSet.
bool result = s_extensionSet.find(extension)!=s_extensionSet.end();
bool result = extensionSet.find(extension)!=extensionSet.end();
// now see if extension is in the extension disabled list
bool extensionDisabled = false;
if (result)
{
const std::string& disableString = getGLExtensionDisableString();
if (!disableString.empty())
{
static const GLubyte* s_renderer = glGetString(GL_RENDERER);
static std::string s_rendererString(s_renderer?(const char*)s_renderer:"");
std::string::size_type pos=0;
while ( pos!=std::string::npos && (pos=disableString.find(extension,pos))!=std::string::npos )
{
@@ -103,7 +112,7 @@ bool osg::isGLExtensionSupported(const char *extension)
break;
}
if (s_rendererString.find(renderer)!=std::string::npos)
if (rendererString.find(renderer)!=std::string::npos)
{
extensionDisabled = true;
break;
@@ -141,30 +150,42 @@ std::string& osg::getGLExtensionDisableString()
}
bool osg::isGLUExtensionSupported(const char *extension)
bool osg::isGLUExtensionSupported(unsigned int contextID, const char *extension)
{
typedef std::set<std::string> ExtensionSet;
static ExtensionSet s_extensionSet;
static const char* s_extensions = NULL;
if (s_extensions==NULL)
static osg::buffered_object<ExtensionSet> s_extensionSetList;
static osg::buffered_object<std::string> s_rendererList;
static osg::buffered_value<int> s_initializedList;
ExtensionSet& extensionSet = s_extensionSetList[contextID];
std::string& rendererString = s_rendererList[contextID];
// if not already set up, initialize all the per graphic context values.
if (!s_initializedList[contextID])
{
s_initializedList[contextID] = 1;
// set up the renderer
const GLubyte* renderer = glGetString(GL_RENDERER);
rendererString = renderer ? (const char*)renderer : "";
// get the extension list from OpenGL.
s_extensions = (const char*)gluGetString(GLU_EXTENSIONS);
if (s_extensions==NULL) return false;
const char* extensions = (const char*)gluGetString(GLU_EXTENSIONS);
if (extensions==NULL) return false;
// insert the ' ' delimiated extensions words into the extensionSet.
const char *startOfWord = s_extensions;
const char *startOfWord = extensions;
const char *endOfWord;
while ((endOfWord = strchr(startOfWord,' '))!=NULL)
{
s_extensionSet.insert(std::string(startOfWord,endOfWord));
extensionSet.insert(std::string(startOfWord,endOfWord));
startOfWord = endOfWord+1;
}
if (*startOfWord!=0) s_extensionSet.insert(std::string(startOfWord));
if (*startOfWord!=0) extensionSet.insert(std::string(startOfWord));
osg::notify(INFO)<<"OpenGL extensions supported by installed OpenGL drivers are:"<<std::endl;
for(ExtensionSet::iterator itr=s_extensionSet.begin();
itr!=s_extensionSet.end();
for(ExtensionSet::iterator itr=extensionSet.begin();
itr!=extensionSet.end();
++itr)
{
osg::notify(INFO)<<" "<<*itr<<std::endl;
@@ -173,7 +194,7 @@ bool osg::isGLUExtensionSupported(const char *extension)
}
// true if extension found in extensionSet.
bool result = s_extensionSet.find(extension)!=s_extensionSet.end();
bool result = extensionSet.find(extension)!=extensionSet.end();
if (result) osg::notify(INFO)<<"OpenGL utility library extension '"<<extension<<"' is supported."<<std::endl;
else osg::notify(INFO)<<"OpenGL utility library extension '"<<extension<<"' is not supported."<<std::endl;