glXQueryDrawable — returns an attribute assoicated with a GLX drawable
int glXQueryDrawable( | Display * | dpy, |
| GLXDrawable | draw, | |
| int | attribute, | |
| unsigned int * | value); |
dpySpecifies the connection to the X server.
drawSpecifies the GLX drawable to be queried.
attribute
Specifies the attribute to be returned. Must be one of
GLX_WIDTH,
GLX_HEIGHT,
GLX_PRESERVED_CONTENTS,
GLX_LARGEST_PBUFFER, or
GLX_FBCONFIG_ID.
value
Contains the return value for
attribute.
glXQueryDrawable sets
value to the value of
attribute with respect to the GLXDrawable
draw.
attribute may be one of the following:
GLX_WIDTH
Returns the width of ctx.
GLX_HEIGHT
Returns the height of ctx.
GLX_PRESERVED_CONTENTS
Returns True if the contents
of a GLXPbuffer are preserved when a resource
conflict occurs; False otherwise.
GLX_LARGEST_PBUFFER
Returns the value set when
glXCreatePbuffer was called to
create the GLXPbuffer. If
False is returned, then the
call to glXCreatePbuffer will
fail to create a GLXPbuffer if the requested size
is larger than the implementation maximum or
available resources. If True
is returned, a GLXPbuffer of the maximum availble
size (if less than the requested width and height)
is created.
GLX_FBCONFIG_ID
Returns the XID for draw.
If draw is a GLXWindow or GLXPixmap and
attribute is set to
GLX_PRESERVED_CONTENTS or
GLX_LARGETST_PBUFFER, the contents of
value are undefined. If
attribute is not one of the attributes
listed above, the contents of value are
unedfined.
glXCreateWindow, glXCreatePixmap, glXCreatePbuffer, glXGetFBConfigAttrib, glXChooseFBConfig
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