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