Sophie: php-manual-pt_BR-5.2.4-1mdv2008.1 noarch

php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
NAME="function.imagefilter"
></A
>imagefilter</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN84730"
></A
><P
>    (PHP 5)</P
>imagefilter&nbsp;--&nbsp;Applies a filter to an image</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84733"
></A
><H2
>Descrição</H2
>bool <B
CLASS="methodname"
>imagefilter</B
> ( resource image, int filtertype [, int arg1 [, int arg2 [, int arg3]]] )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>imagefilter()</B
> applies the given filter
   <CODE
CLASS="parameter"
>filtertype</CODE
> on the <CODE
CLASS="parameter"
>image</CODE
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84757"
></A
><H2
>Parâmetros</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13; image</CODE
></DT
><DD
><P
>An image resource, returned by one of the image creation functions,
 such as <A
HREF="function.imagecreatetruecolor.html"
><B
CLASS="function"
>imagecreatetruecolor()</B
></A
>.</P
></DD
><DT
><CODE
CLASS="parameter"
>filtertype</CODE
></DT
><DD
><P
>&#13;       <CODE
CLASS="parameter"
>filtertype</CODE
> can be one of the following:
       <P
></P
><UL
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_NEGATE</B
></TT
>: Reverses all colors of
          the image.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_GRAYSCALE</B
></TT
>: Converts the image into
          grayscale.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_BRIGHTNESS</B
></TT
>: Changes the brightness
          of the image. Use <CODE
CLASS="parameter"
>arg1</CODE
> to set the level of
          brightness.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_CONTRAST</B
></TT
>: Changes the contrast of
          the image. Use <CODE
CLASS="parameter"
>arg1</CODE
> to set the level of
          contrast.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_COLORIZE</B
></TT
>: Like
          <TT
CLASS="constant"
><B
>IMG_FILTER_GRAYSCALE</B
></TT
>, except you can specify the
          color. Use <CODE
CLASS="parameter"
>arg1</CODE
>, <CODE
CLASS="parameter"
>arg2</CODE
> and
          <CODE
CLASS="parameter"
>arg3</CODE
> in the form of
          <CODE
CLASS="parameter"
>red</CODE
>, <CODE
CLASS="parameter"
>blue</CODE
>,
          <CODE
CLASS="parameter"
>green</CODE
>. The range for each color is 0 to 255.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_EDGEDETECT</B
></TT
>: Uses edge detection to
          highlight the edges in the image.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_EMBOSS</B
></TT
>: Embosses the image.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_GAUSSIAN_BLUR</B
></TT
>: Blurs the image using
          the Gaussian method.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_SELECTIVE_BLUR</B
></TT
>: Blurs the image.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_MEAN_REMOVAL</B
></TT
>: Uses mean removal to
          achieve a "sketchy" effect.
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>IMG_FILTER_SMOOTH</B
></TT
>: Makes the image smoother.
          Use <CODE
CLASS="parameter"
>arg1</CODE
> to set the level of smoothness.
         </P
></LI
></UL
>
      </P
></DD
><DT
><CODE
CLASS="parameter"
>arg1</CODE
></DT
><DD
><P
>&#13;      </P
></DD
><DT
><CODE
CLASS="parameter"
>arg2</CODE
></DT
><DD
><P
>&#13;      </P
></DD
><DT
><CODE
CLASS="parameter"
>arg3</CODE
></DT
><DD
><P
>&#13;      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84832"
></A
><H2
>Valores de retornado</H2
><P
>&#13;   Retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> em caso de sucesso ou <TT
CLASS="constant"
><B
>FALSE</B
></TT
> em falhas.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84837"
></A
><H2
>Exemplos</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN84840"
></A
><P
><B
>Exemplo 1. <B
CLASS="function"
>imagefilter()</B
> grayscale example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$im </font><font color="#007700">= </font><font color="#0000BB">imagecreatefrompng</font><font color="#007700">(</font><font color="#DD0000">'dave.png'</font><font color="#007700">);<br />if (</font><font color="#0000BB">$im </font><font color="#007700">&amp;&amp; </font><font color="#0000BB">imagefilter</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#0000BB">IMG_FILTER_GRAYSCALE</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Image converted to grayscale.'</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#DD0000">'dave.png'</font><font color="#007700">);<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Conversion to grayscale failed.'</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">imagedestroy</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN84844"
></A
><P
><B
>Exemplo 2. <B
CLASS="function"
>imagefilter()</B
> brightness example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$im </font><font color="#007700">= </font><font color="#0000BB">imagecreatefrompng</font><font color="#007700">(</font><font color="#DD0000">'sean.png'</font><font color="#007700">);<br />if (</font><font color="#0000BB">$im </font><font color="#007700">&amp;&amp; </font><font color="#0000BB">imagefilter</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#0000BB">IMG_FILTER_BRIGHTNESS</font><font color="#007700">, </font><font color="#0000BB">20</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Image brightness changed.'</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#DD0000">'sean.png'</font><font color="#007700">);<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Image brightness change failed.'</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">imagedestroy</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN84848"
></A
><P
><B
>Exemplo 3. <B
CLASS="function"
>imagefilter()</B
> colorize example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$im </font><font color="#007700">= </font><font color="#0000BB">imagecreatefrompng</font><font color="#007700">(</font><font color="#DD0000">'philip.png'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* R, G, B, so 0, 255, 0 is green */<br /></font><font color="#007700">if (</font><font color="#0000BB">$im </font><font color="#007700">&amp;&amp; </font><font color="#0000BB">imagefilter</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#0000BB">IMG_FILTER_COLORIZE</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">255</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Image successfully shaded green.'</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">, </font><font color="#DD0000">'philip.png'</font><font color="#007700">);<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">'Green shading failed.'</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">imagedestroy</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84852"
></A
><H2
>Notas</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>Esta função somente está disponível se
 o PHP estiver compilado com a versão embarcada da biblioteca GD.</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN84856"
></A
><H2
>Veja também</H2
><P
>&#13;   <P
></P
><TABLE
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><TBODY
><TR
><TD
><A
HREF="function.imageconvolution.html"
><B
CLASS="function"
>imageconvolution()</B
></A
></TD
></TR
></TBODY
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><P
></P
>
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