Imagick 添加文字水印示例-优快云博客

本文介绍如何使用PHP的Imagick扩展来设置文本水印的位置，并提供了两个示例，展示了如何创建带有阴影效果和发光效果的文字水印。

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原文来自

http://eclecticdjs.com/mike/tutorials/php/imagemagick/examples_04/setgravity.php

描述：

bool ImagickDraw::setGravity ( int $gravity )

设置文字水印的位置

参数：

Gravity参数只能是以下常量： imagick::GRAVITY_NORTHWEST　//左下
imagick::GRAVITY_NORTH //左边居中
imagick::GRAVITY_EASNORTHT　//左顶
imagick::GRAVITY_WEST　　　　 //底部居中
imagick::GRAVITY_CENTER　　　 //居中
imagick::GRAVITY_EAST //顶部居中
imagick::GRAVITY_SOUTHWEST　//对应右下角
imagick::GRAVITY_SOUTH　　　　//右居中
imagick::GRAVITY_SOUTHEAST　　//对应右上角

示例１


<?

$text
=
"DJMike"
;

$font
=
"Bookman-DemiItalic"
;

$pointsize
=
100
;

$depth
=
4
;


#makeatransparentpallete

$pallete
=new
Imagick
;

$pallete
->
newimage
(
450
,
105
,
"transparent"
);

#setpalletformattogif

$pallete
->
setimageformat
(
"gif"
);


#makeadrawobjectwithsettings

$draw
=new
imagickdraw
();

$draw
->
setgravity
(
imagick
::
GRAVITY_CENTER
);

$draw
->
setfont
(
"
$font
"
);

$draw
->
setfontsize
(
$pointsize
);


#setfontcolorwhite

$draw
->
setfillcolor
(
"#ffffff"
);

#offsetannotate

$pallete
->
annotateImage
(
$draw
,
$depth
,-
$depth
-
3
,
0
,
$text
);

$pallete
->
annotateImage
(
$draw
,-
$depth
,-
$depth
-
3
,
0
,
$text
);


#setfontcolorblack

$draw
->
setfillcolor
(
"#000000"
);

#offsetannotate

$pallete
->
annotateImage
(
$draw
,-
$depth
,
$depth
-
2
,
0
,
$text
);

$pallete
->
annotateImage
(
$draw
,
$depth
,
$depth
-
3
,
0
,
$text
);


#setfontcolorblue

$draw
->
setfillcolor
(
"#0000ff"
);

#centerannotateontopofoffsetannotates

$pallete
->
annotateImage
(
$draw
,
0
,
0
,
0
,
$text
);


#blur

$pallete
->
gaussianBlurImage
(
2
,
1.5
);


#outputtobrowser

$pallete
->
setImageFormat
(
"gif"
);

header
(
"Content-Type:image/gif"
);

echo
$pallete
;

?>

示例２


<?

$text
=
"DJMike"
;

$font
=
"lokicola.ttf"
;

$fontsize
=
100
;

$fontcolor
=
"#aa0000"
;

$glow_radius
=
15
;

#Threeglowcolors

$glow
=array(
"#ff0000"
,
"#ff8800"
,
"#ffff00"
);


#movestextdown

$offset
=
12
;


#makeablackpallete

$pallete
=new
Imagick
;

$pallete
->
newimage
(
375
,
140
,
"#000000"
);

#setpalletformattogif

$pallete
->
setimageformat
(
"gif"
);


#makeadrawobjectwithsettings

$draw
=new
imagickdraw
();

$draw
->
setgravity
(
imagick
::
GRAVITY_CENTER
);

$draw
->
setfont
(
"
$font
"
);

$draw
->
setfontsize
(
$fontsize
);


#Loopthroughglowcolors

foreach(
$glow
as
$var
)

{

$draw
->
setfillcolor
(
"
$var
"
);

$pallete
->
annotateImage
(
$draw
,
0
,
$offset
,
0
,
$text
);

$pallete
->
annotateImage
(
$draw
,
0
,
$offset
,
0
,
$text
);

$pallete
->
BlurImage
(
$glow_radius
,
$glow_radius
);

}


#toplayer

$draw
->
setfillcolor
(
"
$fontcolor
"
);

#centerannotateontopofoffsetannotates

$pallete
->
annotateImage
(
$draw
,
0
,
$offset
,
0
,
$text
);


#outputtobrowser

$pallete
->
setImageFormat
(
"gif"
);

header
(
"Content-Type:image/gif"
);

echo
$pallete
;

?>