<HTML> <HEAD> <TITLE>vs_3_0</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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See: </P> <PRE> <A HREF="http://msdn.microsoft.com/en-us/library/bb172930.aspx">msdn.microsoft.com/en-us/library/bb172930.aspx</A> </PRE><P> Data-dependent loops <I>are</I> allowed with a limit of 256 iterations maximum. Four levels of nesting are allowed. </P> <P> Conditional expressions <I>can be</I> supported with data-dependent branching. </P> <P> Relative indexing of uniform arrays is not supported; use texture accesses instead. </P> <H1><A NAME="3D_API_DEPENDENCIES"><A NAME="4">3D API DEPENDENCIES </A></A></H1> <P> Requires Direct3D 9 support. </P> <H1><A NAME="PROFILE_OPTIONS"><A NAME="5">PROFILE OPTIONS </A></A></H1> <P> None. </P> <H1><A NAME="DATA_TYPES"><A NAME="6">DATA TYPES </A></A></H1> <DL> <DT><STRONG>half </STRONG></DT> <DD> <P> The <B>half</B> data type makes use of the Partial Precision instruction modifier to request less precision. </P> <P> NVIDIA GPUs may use half-precision floating-point when the Partial Precision instruction modifier is specified. Half-precision floating-point is encoded with a sign bit, 10 mantissa bits, and 5 exponent bits (biased by 16), sometimes called <I>s10e5</I>. </P> <DT><STRONG>float </STRONG></DT> <DD> <P> <B>float</B> values in <B>vs_3_0</B> require standard IEEE 754 single-precision floating-point encoding with a sign bit, 23 mantissa bits, and 8 exponent bits (biased by 128), sometimes called <I>s10e5</I>. </P> <DT><STRONG>fixed </STRONG></DT> <DD> <P> The <B>fixed</B> data type is treated like <B>half</B>. </P> </DD></DL> <H1><A NAME="SEMANTICS"><A NAME="7">SEMANTICS </A></A></H1> <H2><A NAME="INPUT_SEMANTICS"><A NAME="8">INPUT SEMANTICS </A></A></H2> <PRE> Binding Semantics Name Corresponding Data COLOR Input primary color COLOR0 COL COL0 COLOR1 Input secondary color COL1 TEX0 Input texture coordinate sets 0 TEXCOORD0 TEX1 Input texture coordinate sets 1 TEXCOORD1 TEX2 Input texture coordinate sets 2 TEXCOORD2 TEX3 Input texture coordinate sets 3 TEXCOORD3 TEX4 Input texture coordinate sets 4 TEXCOORD4 TEX5 Input texture coordinate sets 5 TEXCOORD5 TEX6 Input texture coordinate sets 6 TEXCOORD6 TEX7 Input texture coordinate sets 7 TEXCOORD7 FOGP Input fog color (XYZ) and factor (W) FOG </PRE> <H2><A NAME="UNIFORM_INPUT_SEMANTICS"><A NAME="9">UNIFORM INPUT SEMANTICS </A></A></H2> <P> Eight texture units are supported: </P> <PRE> Binding Semantic Name Corresponding Data TEXUNIT0 Texture unit 0 TEXUNIT1 Texture unit 1 ... TEXUNIT7 Texture unit 7 </PRE> <H2><A NAME="OUTPUT_SEMANTICS"><A NAME="10">OUTPUT SEMANTICS </A></A></H2> <PRE> Binding Semantics Name Corresponding Data POSITION, HPOS Output position PSIZE, PSIZ Output point size FOG, FOGC Output fog coordinate COLOR0, COL0 Output primary color COLOR1, COL1 Output secondary color BCOL0 Output backface primary color BCOL1 Output backface secondary color TEXCOORD0-TEXCOORD7, Output texture coordinates TEX0-TEX7 CLP0-CL5 Output Clip distances </PRE> <H1><A NAME="STANDARD_LIBRARY_ISSUES"><A NAME="11">STANDARD LIBRARY ISSUES </A></A></H1> <P> This profile may have limits on the number of dependent texture fetches. </P> <H1><A NAME="SEE_ALSO"><A NAME="12">SEE ALSO </A></A></H1> <P> <A HREF="ps_3_0.html">ps_3_0</A> </P> </BLOCKQUOTE> </BODY>