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check for Mesa to indicate software rendering

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This commit is contained in:
David Rose 2004-12-30 18:44:40 +00:00
parent 81ea39486f
commit d9c06fb116
1 changed files with 45 additions and 1 deletions
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46
panda/src/glxdisplay/glxGraphicsPipe.cxx
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@ -184,6 +184,51 @@ make_gsg(const FrameBufferProperties &properties,
share_context = share_gsg->_context;
}
int frame_buffer_mode = properties.get_frame_buffer_mode();
bool hardware = ((frame_buffer_mode & FrameBufferProperties::FM_hardware) != 0);
bool software = ((frame_buffer_mode & FrameBufferProperties::FM_software) != 0);
// If the user specified neither hardware nor software frame buffer,
// he gets either one.
if (!hardware && !software) {
hardware = true;
software = true;
}
// There's no interface in GLX to query whether we have a software
// or a hardware rendering context. Fortunately, there seems to be
// only one likely software GLX context, and that's Mesa; we will
// assume that any Mesa GLX context is software-based, and any other
// context is hardware-based.
// To determine whether we are using Mesa, we should strictly create
// a GL context, bind it to a window, and then examine the
// GL_RENDERER string, but as a cheesy shortcut to all of that hard
// work, we'll just check the X server's GLX_VERSION string to see
// if it contains "Mesa".
const char *glx_version = glXQueryServerString(_display, _screen, GLX_VERSION);
if (glx_version != NULL) {
if (strstr(glx_version, "Mesa") != NULL) {
// It's Mesa, therefore probably a software context.
if (!software) {
glxdisplay_cat.error()
<< "Using GLX version " << glx_version << "; it is probably a software renderer.\n";
glxdisplay_cat.error()
<< "To allow use of this display add FM_software to your frame buffer mode.\n";
return NULL;
}
} else {
// It's some other server, therefore probably a hardware context.
if (!hardware) {
glxdisplay_cat.error()
<< "Using GLX version " << glx_version << "; it is probably hardware-accelerated.\n";
glxdisplay_cat.error()
<< "To allow use of this display add FM_hardware to your frame buffer mode.\n";
return NULL;
}
}
}
FrameBufferProperties new_properties = properties;
GLXContext context = NULL;
XVisualInfo *visual = NULL;
@ -285,7 +330,6 @@ make_buffer(GraphicsStateGuardian *gsg, const string &name,
GLXFBConfig glxGraphicsPipe::
choose_fbconfig(FrameBufferProperties &properties) const {
int frame_buffer_mode = 0;
if (properties.has_frame_buffer_mode()) {
frame_buffer_mode = properties.get_frame_buffer_mode();
}