glXQueryDrawable.3G man page

glXQueryDrawable — returns an attribute assoicated with a GLX drawable

C Specification

int glXQueryDrawable(Display * dpy, GLXDrawable draw, int attribute, unsigned int * value);

Parameters

dpy

Specifies the connection to the X server.

draw

Specifies 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.

Description

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.

Errors

A GLXBadDrawable is generated if draw is not a valid GLXDrawable.

See Also

glXCreateWindow(), glXCreatePixmap(), glXCreatePbuffer(), glXGetFBConfigAttrib(), glXChooseFBConfig()

Authors

opengl.org

Info

02/04/2016 opengl.org OpenGL Manual