<HTML> <HEAD> <TITLE>cgSetBufferSubData</TITLE> <STYLE TYPE="text/css" MEDIA=screen> <!-- BODY { font-family: Arial,Helvetica; } BLOCKQUOTE { margin: 10pt; } H1,A { color: #336699; } /*** Top menu style ****/ .mmenuon { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ff6600; font-size: 10pt; } .mmenuoff { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: 10pt; } .cpyright { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .cpyrightText { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .sections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 11pt; } .dsections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 12pt; } .slink { font-family: Arial,Helvetica; font-weight: normal; text-decoration: none; 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</PRE> <H1><A NAME="PARAMETERS"><A NAME="3">PARAMETERS </A></A></H1> <DL> <DT><STRONG>buffer </STRONG></DT> <DD> <P> Buffer being updated. </P> <DT><STRONG>offset </STRONG></DT> <DD> <P> Buffer offset in bytes of the beginning of the partial update. </P> <DT><STRONG>size </STRONG></DT> <DD> <P> Number of buffer bytes to be updated. Zero means no update. </P> <DT><STRONG>data </STRONG></DT> <DD> <P> Pointer to the start of the data being copied into the buffer. </P> </DD></DL> <H1><A NAME="RETURN_VALUES"><A NAME="4">RETURN VALUES </A></A></H1> <P> None. </P> <H1><A NAME="DESCRIPTION"><A NAME="5">DESCRIPTION </A></A></H1> <P> <B>cgSetBufferSubData</B> resizes and partially updates an existing buffer object. </P> <P> A buffer which has been mapped into an applications address space with <A HREF="cgMapBuffer.html">cgMapBuffer</A> must be unmapped using <A HREF="cgUnmapBuffer.html">cgUnmapBuffer</A> before it can be updated with <B>cgSetBufferSubData</B>. </P> <H1><A NAME="EXAMPLES"><A NAME="6">EXAMPLES </A></A></H1> <P> cgSetBufferSubData( myBuffer, 16, sizeof( myData ), myData ); </P> <H1><A NAME="ERRORS"><A NAME="7">ERRORS </A></A></H1> <P> <B>CG_INVALID_BUFFER_HANDLE_ERROR</B> is generated if <B>buffer</B> is not a valid buffer. </P> <P> <B>CG_BUFFER_UPDATE_NOT_ALLOWED_ERROR</B> is generated if <B>buffer</B> is currently mapped. </P> <P> <B>CG_BUFFER_INDEX_OUT_OF_RANGE_ERROR</B> is generated if <B>offset</B> or <B>size</B> is out of range. </P> <H1><A NAME="HISTORY"><A NAME="8">HISTORY </A></A></H1> <P> <B>cgSetBufferSubData</B> was introduced in Cg 2.0. </P> <H1><A NAME="SEE_ALSO"><A NAME="9">SEE ALSO </A></A></H1> <P> <A HREF="cgCreateBuffer.html">cgCreateBuffer</A>, <A HREF="cgGLCreateBuffer.html">cgGLCreateBuffer</A>, <A HREF="cgSetBufferData.html">cgSetBufferData</A>, <A HREF="cgMapBuffer.html">cgMapBuffer</A>, <A HREF="cgUnmapBuffer.html">cgUnmapBuffer</A> </P> </BLOCKQUOTE> </BODY>