FGFS-4.1/OpenSceneGraph
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Added checked from the ARG version of glDraw*Instanced().

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This commit is contained in:
Robert Osfield 2009-01-08 11:19:21 +00:00
parent 8418e3cb40
commit 3b192f5119
2 changed files with 34 additions and 2 deletions
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32
include/osg/GLExtensions
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@ -78,6 +78,22 @@ inline void* getGLExtensionFuncPtr(const char *funcName,const char *fallbackFunc
return getGLExtensionFuncPtr(fallbackFuncName);
}
/** Return the address of the specified OpenGL function. If not found then
* check a second function name, if this fails then return NULL as function is
* not supported by OpenGL library. This is used for checking something
* like glActiveTexture (which is in OGL1.3) or glActiveTextureARB.
*/
inline void* getGLExtensionFuncPtr(const char *funcName1, const char *funcName2, const char *funcName3)
{
void* ptr = getGLExtensionFuncPtr(funcName1);
if (ptr) return ptr;
ptr = getGLExtensionFuncPtr(funcName2);
if (ptr) return ptr;
return getGLExtensionFuncPtr(funcName3);
}
template<typename T, typename R>
T convertPointerType(R src)
{
@ -118,6 +134,22 @@ bool setGLExtensionFuncPtr(T& t, const char* str1, const char* str2)
}
}
template<typename T>
bool setGLExtensionFuncPtr(T& t, const char* str1, const char* str2, const char* str3)
{
void* data = osg::getGLExtensionFuncPtr(str1,str2,str3);
if (data)
{
memcpy(&t, &data, sizeof(T));
return true;
}
else
{
t = 0;
return false;
}
}
/** Return true if OpenGL "extension" is supported.
* Note: Must only be called within a valid OpenGL context,

4
src/osg/State.cpp
View File

@ -756,8 +756,8 @@ void State::initializeExtensionProcs()
setGLExtensionFuncPtr(_glDisableVertexAttribArray, "glDisableVertexAttribArray","glDisableVertexAttribArrayARB");
setGLExtensionFuncPtr(_glBindBuffer, "glBindBuffer","glBindBufferARB");
setGLExtensionFuncPtr(_glDrawArraysInstanced, "glDrawArraysInstanced","glDrawArraysInstancedEXT");
setGLExtensionFuncPtr(_glDrawElementsInstanced, "glDrawElementsInstanced","glDrawElementsInstancedEXT");
setGLExtensionFuncPtr(_glDrawArraysInstanced, "glDrawArraysInstanced","glDrawArraysInstancedARB","glDrawArraysInstancedEXT");
setGLExtensionFuncPtr(_glDrawElementsInstanced, "glDrawElementsInstanced","glDrawElementsInstancedARB","glDrawElementsInstancedEXT");
if ( osg::getGLVersionNumber() >= 2.0 || osg::isGLExtensionSupported(_contextID,"GL_ARB_vertex_shader") )
{