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IABSD.fr/xenocara/lib/fontconfig/doc/fcmatrix.fncs
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/* * $Id: fcmatrix.fncs,v 1.1.1.2 2006/12/31 14:58:00 matthieu Exp $ * * Copyright © 2003 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Keith Packard not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Keith Packard makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ @FUNC@ FcMatrixInit @PURPOSE@ initialize an FcMatrix structure @TYPE1@ FcMatrix * @ARG1@ matrix @DESC@ <function>FcMatrixInit</function> initializes <parameter>matrix</parameter> to the identity matrix. @@ @FUNC@ FcMatrixCopy @PURPOSE@ Copy a matrix @TYPE1@ const FcMatrix * @ARG1@ matrix @DESC@ <function>FcMatrixCopy</function> allocates a new FcMatrix and copies <parameter>mat</parameter> into it. @@ @FUNC@ FcMatrixEqual @PURPOSE@ Compare two matrices @TYPE1@ const FcMatrix * @ARG1@ matrix1 @TYPE2@ const FcMatrix * @ARG2@ matrix2 @DESC@ <function>FcMatrixEqual</function> compares <parameter>matrix1</parameter> and <parameter>matrix2</parameter> returning FcTrue when they are equal and FcFalse when they are not. @@ @FUNC@ FcMatrixMultiply @PURPOSE@ Multiply matrices @TYPE1@ FcMatrix * @ARG1@ result @TYPE2@ const FcMatrix * @ARG2@ matrix1 @TYPE3@ const FcMatrix * @ARG3@ matrix2 @DESC@ <function>FcMatrixMultiply</function> multiplies <parameter>matrix1</parameter> and <parameter>matrix2</parameter> storing the result in <parameter>result</parameter>. @@ @FUNC@ FcMatrixRotate @PURPOSE@ Rotate a matrix @TYPE1@ FcMatrix * @ARG1@ matrix @TYPE2@ double% @ARG2@ cos @TYPE3@ double% @ARG3@ sin @DESC@ <function>FcMatrixRotate</function> rotates <parameter>matrix</parameter> by the angle who's sine is <parameter>sin</parameter> and cosine is <parameter>cos</parameter>. This is done by multiplying by the matrix: <programlisting> cos -sin sin cos </programlisting> @@ @FUNC@ FcMatrixScale @PURPOSE@ Scale a matrix @TYPE1@ FcMatrix * @ARG1@ matrix @TYPE2@ double% @ARG2@ sx @TYPE3@ double% @ARG3@ dy @DESC@ <function>FcMatrixScale</function> multiplies <parameter>matrix</parameter> x values by <parameter>sx</parameter> and y values by <parameter>sy</parameter>. This is done by multiplying by the matrix: <programlisting> sx 0 0 sy </programlisting> @@ @FUNC@ FcMatrixShear @PURPOSE@ Shear a matrix @TYPE1@ FcMatrix * @ARG1@ matrix @TYPE2@ double% @ARG2@ sh @TYPE3@ double% @ARG3@ sv @DESC@ <function>FcMatrixShare</function> shears <parameter>matrix</parameter> horizontally by <parameter>sh</parameter> and vertically by <parameter>sv</parameter>. This is done by multiplying by the matrix: <programlisting> 1 sh sv 1 </programlisting> @@