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Mathias Frhlich:

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just a few split out patches from my zoo of local work ...

The patch to simgear-glxproc.diff changes dlopen to not open a specific library.
If it is used with a NULL argument, we just get a handle to the current running
binary including all loaded libraries. This has the advantage that we do not
rely on the name of libGL on the specific platform.
Also a user can link with his own different named libGL or with a static libGL.a

Then the render texture again ...

glxQueryVersion turns out to return the  minimum of the client libraries glx
version and the servers glx version. *All* Xorg servers return 1.2 here.
So we never get the glxPBuffer functions  which are the only ones working with
ati's drivers ...
Reverted back to checking the required functions and just use them if they are
there. Still prefering the glx standard variants since they work on ati's
drivers ...
This commit is contained in:
ehofman
2005-09-05 09:02:56 +00:00
parent 9c54603726
commit 669d9a89ca
2 changed files with 21 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
simgear/screen/RenderTexture.cpp
View File

@@ -1821,29 +1821,21 @@ bool RenderTexture::_VerifyExtensions()
#elif defined( __APPLE__ )
#else
int minor, major;
_pDisplay = glXGetCurrentDisplay();
if (!glXQueryVersion(_pDisplay, &major, &minor))
return false;
// First try the glX version 1.3 functions.
glXChooseFBConfigPtr = (glXChooseFBConfigProc)SGLookupFunction("glXChooseFBConfig");
glXCreateGLXPbufferPtr = (glXCreateGLXPbufferProc)SGLookupFunction("glXCreatePbuffer");
glXGetVisualFromFBConfigPtr = (glXGetVisualFromFBConfigProc)SGLookupFunction("glXGetVisualFromFBConfig");
glXCreateContextPtr = (glXCreateContextProc)SGLookupFunction("glXCreateContext");
glXDestroyPbufferPtr = (glXDestroyPbufferProc)SGLookupFunction("glXDestroyPbuffer");
glXQueryDrawablePtr = (glXQueryDrawableProc)SGLookupFunction("glXQueryDrawable");
glXVersion1_3Present = major >= 1 && minor >= 3;
if (glXVersion1_3Present)
{
glXChooseFBConfigPtr = (glXChooseFBConfigProc)SGLookupFunction("glXChooseFBConfig");
glXCreateGLXPbufferPtr = (glXCreateGLXPbufferProc)SGLookupFunction("glXCreatePbuffer");
glXGetVisualFromFBConfigPtr = (glXGetVisualFromFBConfigProc)SGLookupFunction("glXGetVisualFromFBConfig");
glXCreateContextPtr = (glXCreateContextProc)SGLookupFunction("glXCreateContext");
glXDestroyPbufferPtr = (glXDestroyPbufferProc)SGLookupFunction("glXDestroyPbuffer");
glXQueryDrawablePtr = (glXQueryDrawableProc)SGLookupFunction("glXQueryDrawable");
if (!glXChooseFBConfigPtr ||
!glXCreateGLXPbufferPtr ||
!glXGetVisualFromFBConfigPtr ||
!glXCreateContextPtr ||
!glXDestroyPbufferPtr ||
!glXQueryDrawablePtr)
return false;
}
if (glXChooseFBConfigPtr &&
glXCreateGLXPbufferPtr &&
glXGetVisualFromFBConfigPtr &&
glXCreateContextPtr &&
glXDestroyPbufferPtr &&
glXQueryDrawablePtr)
glXVersion1_3Present = true;
else
{
glXChooseFBConfigPtr = (glXChooseFBConfigProc)SGLookupFunction("glXChooseFBConfigSGIX");
@@ -1863,16 +1855,6 @@ bool RenderTexture::_VerifyExtensions()
return false;
}
// if (!GLX_SGIX_pbuffer)
// {
// PrintExtensionError("GL_SGIX_pbuffer");
// return false;
// }
// if (!GLX_SGIX_fbconfig)
// {
// PrintExtensionError("GLX_SGIX_fbconfig");
// return false;
// }
if (_bIsDepthTexture && !GL_ARB_depth_texture)
{
PrintExtensionError("GL_ARB_depth_texture");

11
simgear/screen/extensions.cxx
View File

@@ -107,11 +107,14 @@ void *SGGetGLProcAddress(const char *func) {
*/
dlerror();
/*
* Since libGL must be linked to the binary we run on, this is the
* right handle. That 'current binary' handle also avoids conflicts which
* arise from linking with a different libGL at link time an than later
* use the standard libGL at runtime ...
*/
if (libHandle == NULL)
libHandle = dlopen("libGL.so", RTLD_LAZY);
if (libHandle == NULL)
libHandle = dlopen("libGL.so.1", RTLD_LAZY);
libHandle = dlopen(NULL, RTLD_LAZY);
if (libHandle != NULL) {
fptr = dlsym(libHandle, func);