📄 fglpushclientattrib.html
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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>fglPushClientAttrib,</STRONG> <STRONG>fglPopClientAttrib</STRONG> - push and pop the client attribute stack <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG> SUBROUTINE <STRONG>fglPushClientAttrib</STRONG>( INTEGER*4 <EM>mask</EM> ) <STRONG>PARAMETERS</STRONG> <EM>mask</EM> Specifies a mask that indicates which attributes to save. Values for <EM>mask</EM> are listed below. <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG> SUBROUTINE <STRONG>fglPopClientAttrib</STRONG>( ) <STRONG>DESCRIPTION</STRONG> <STRONG>fglPushClientAttrib</STRONG> takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. <EM>mask</EM> is typically constructed by OR'ing several of these constants together. The special mask <STRONG>GL_CLIENT_ALL_ATTRIB_BITS</STRONG> can be used to save all stackable client state. The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved): <STRONG>GL_CLIENT_PIXEL_STORE_BIT</STRONG> Pixel storage modes <STRONG>GL_CLIENT_VERTEX_ARRAY_BIT</STRONG> Vertex arrays (and enables) <STRONG>fglPopClientAttrib</STRONG> restores the values of the client-state variables saved with the last <STRONG>fglPushClientAttrib</STRONG>. Those not saved are left unchanged. It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state. Initially, the client attribute stack is empty. <STRONG>NOTES</STRONG> <STRONG>fglPushClientAttrib</STRONG> is available only if the GL version is 1.1 or greater. Not all values for GL client state can be saved on the attribute stack. For example, select and feedback state cannot be saved. The depth of the attribute stack depends on the implementation, but it must be at least 16. Use <STRONG>fglPushAttrib</STRONG> and <STRONG>fglPopAttrib</STRONG> to push and restore state which is kept on the server. Only pixel storage modes and vertex array state may be pushed and popped with <STRONG>fglPushClientAttrib</STRONG> and <STRONG>fglPopClientAttrib</STRONG>. <STRONG>ERRORS</STRONG> <STRONG>GL_STACK_OVERFLOW</STRONG> is generated if <STRONG>fglPushClientAttrib</STRONG> is called while the attribute stack is full. <STRONG>GL_STACK_UNDERFLOW</STRONG> is generated if <STRONG>fglPopClientAttrib</STRONG> is called while the attribute stack is empty. <STRONG>ASSOCIATED</STRONG> <STRONG>GETS</STRONG> <STRONG>fglGet</STRONG> with argument <STRONG>GL_ATTRIB_STACK_DEPTH</STRONG> <STRONG>fglGet</STRONG> with argument <STRONG>GL_MAX_CLIENT_ATTRIB_STACK_DEPTH</STRONG> <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>fglColorPointer</STRONG>, <STRONG>fglDisableClientState</STRONG>, <STRONG>fglEdgeFlagPointer</STRONG>, <STRONG>fglEnableClientState</STRONG>, <STRONG>fglGet</STRONG>, <STRONG>fglGetError</STRONG>, <STRONG>fglIndexPointer</STRONG>, <STRONG>fglNormalPointer</STRONG>, <STRONG>fglNewList</STRONG>, <STRONG>fglPixelStore</STRONG>, <STRONG>fglPushAttrib</STRONG>, <STRONG>fglTexCoordPointer</STRONG>, <STRONG>fglVertexPointer</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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