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Last updated: Fri, 26 Jan 2007

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# imagepstext

(PHP 3 >= 3.0.9, PHP 4, PHP 5)

imagepstext -- Draws a text over an image using PostScript Type1 fonts

## Описание

array imagepstext ( resource image, string text, resource font, int size, int foreground, int background, int x, int y [, int space [, int tightness [, float angle [, int antialias_steps]]]] )

Draws a text on an image using PostScript Type1 fonts.

Refer to PostScript documentation about fonts and their measuring system if you have trouble understanding how this works.

## Список параметров

`image`

  An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

`text`

  The text to be written.

`font`

  Can be 1, 2, 3, 4, 5 for built-in fonts (where higher numbers corresponding to larger fonts) or any of your own font identifiers registered with imageloadfont().

`size`

  `size` is expressed in pixels.

`foreground`

  The color in which the text will be painted.

`background`

  The color to which the text will try to fade in with antialiasing. No pixels with the color `background` are actually painted, so the background image does not need to be of solid color.

`x`

  x-coordinate for the lower-left corner of the first character

`y`

  y-coordinate for the lower-left corner of the first character

`space`

  Allows you to change the default value of a space in a font. This amount is added to the normal value and can also be negative. Expressed in character space units, where 1 unit is 1/1000th of an em-square.

`tightness`

  `tightness` allows you to control the amount of white space between characters. This amount is added to the normal character width and can also be negative. Expressed in character space units, where 1 unit is 1/1000th of an em-square.

`angle`

  `angle` is in degrees.

`antialias_steps`

  Allows you to control the number of colours used for antialiasing text. Allowed values are 4 and 16. The higher value is recommended for text sizes lower than 20, where the effect in text quality is quite visible. With bigger sizes, use 4. It's less computationally intensive.

## Возвращаемые значения

This function returns an array containing the following elements:

0 | lower left x-coordinate
1 | lower left y-coordinate
2 | upper right x-coordinate
3 | upper right y-coordinate

## Примечания

> Замечание: Эта функция доступна только в том случае, если PHP был скомпилирован с опцией `--enable-t1lib`.

## Смотрите также

imagepsbbox()

add a note User Contributed Notes
imagepstext
honza dot bartos at gmail dot com
24-Oct-2006 04:38
`The coordinates given by x, y represent actually a starting point of the text baseline. They represent the lower left corner of the first character only in case that any part of the character doesn't lie below baseline (it works for "Hello" but for "Howdy" it does not - because of letter y). There may be some small differences according to the font and size chosen.`
heckp at uni-trier.de
10-Jul-2003 05:11
`It is important so make shure that the "text" really is a string.
imagepstext ($im, $text, $font, $textsize, $black, $white, 10, 10);
won't work if $text is undefined, so PHP will quit with an error.
so always write it like this:
imagepstext ($im, "$text", $font, $textsize, $black, $white, 10, 10);`
m.confalonieri(at)mclink.it
04-Jun-2003 06:00
`I found a way to let imagepstext understand 32-bit colors (RGBA) by replacing in gd.c:PHP_FUNCTION(imagepstext)
int _fg, _bg, x, y, size, space = 0, aa_steps = 4, width = 0;
with
unsigned int _fg, _bg, x, y, size, space = 0, aa_steps = 4, width = 0;`
Jeroen dot Straahof at newego dot nl
06-Feb-2003 06:12
`I made a function that makes it easy to align text to the right
of an image. Below you can find the code because for me it
works great. You can also use it to center text as well, if you
like to have that simply remove the -10 and split the result
of $imgwidth and $texwidth
function AlignRight($string, $font, $imgwidth, $fontsize) {
list($lx,$ly,$rx,$ry) = imagepsbbox($string,$font,$fontsize,0,0,0);
$textwidth = $rx - $lx;
$imw = ($imgwidth-10-$textwidth);
return $imw;
}`
johan (at) 1way2print.net
06-Nov-2002 02:17
`If you use fonts with special chars, remeber to read in the encoded file *.enc with imagepsencodefont ... etc. for Danish, Swedish, German.....`
a at url dot de
18-Feb-2002 06:16
`a note on kernnig:
t1lib tries to load a corresponding afm file in the directory of the font file.
it does this by replacing the extension (.PFB .pfb) with ".afm". note that this has to be a lowercase afm! usually windows-ps-fonts have file names in all-uppercase, so try renaming the *.AFM file to *.afm.
i also noticed that sometimes this gives an error -2. it seems like t1lib chokes on windows-linebreaks in the afm file.
try 'recode dos..lat1 fontfile.afm' and check again.
if it all works, combinations like "Ta" or "Te" should show the second letter slightly moved to the capital T (on normal fonts like Times anyway).`
npdavis at hotmail dot com
24-May-2001 09:09
`If you have a programming error in your code, using ImagePsText, sometimes t1lib crashes with an unrecoverable error. Because of this, httpd needs to be restarted.
This problem only occurs if there is a programming error, but can drive you crazy when debugging, if you don't know about it. By killing the parent process(httpd) you "reset" t1lib. When debugging, if you get an error then make a code change, restart httpd before testing it again. This will save hours of frustration. Make it a habit to just restart httpd after every error, and you will be much happier.
Also, to see debugging messages, (if you are rendering x's) comment the jpeg header, and the ImageJpeg statement. You will get beautiful error messages. When you get a blank page, your ImagePsText code is working correctly. Uncomment the Header() and ImageJpeg() and see what you have. You might be passing parameters that render a white image with no text, but the code is working!
Numeric t1lib error messages can be decoded using the t1lib_doc.pdf file that comes with t1lib. PHP simply relays these errors from t1lib to the page. Please don't ask the PHP people about these errors... t1lib has beautiful documentation.... use it: )
thx,
Neil`
npdavis at hotmail dot com
24-May-2001 08:56
`One other thing... variables. It is important to convert variables to the proper type before they hit this function. In this respect, ImageTtfText is easier to work with. IE, if you pass a font size from one page to the next, via GPC, it becomes a string type. Sooo... use IntVal() to convert it to an integer type that ImagePsText can digest. In addition you must convert HTML special characters or use chr() to represent special characters. ImagePsFont will not decode &nbsp; to represent a space, use Chr(32) or a space:
$fontsize=IntVal($fontsize);
$font=ImagePsLoadFont("fonts/IntR.pfb");
ImagePsText($im, $textstring, $font, $fontsize, $textcolor, $background, 0, $fontsize,'','','',16); //note antialias is set
ImagePsFreeFont($font);
thx,
Neil`
npdavis at hotmail dot com
22-May-2001 05:54
`with a font included in t1lib:
<?PHP
Header ("Content-type: image/jpeg");
$im = ImageCreate (350, 45);
$black = ImageColorAllocate ($im, 0, 0, 0);
$white = ImageColorAllocate ($im, 255, 255, 255);
$font=ImagePsLoadFont("bchbi.pfb");
ImagePsText($im, "Testing... It worked!",
$font, 32, $white, $black, 32, 32);
ImagePsFreeFont($font);
ImageJpeg($im, "", 100);//for best quality... your mileage may vary
ImageDestroy ($im);
?>
Better than using freetype, but with freetype2, the difference is marginal. To flip backround and foreground colors, alternate the order of ImageColorAllocate statements.
If you get outlines (the antialiasing produces these) reverse the $black and $white color identifiers in the ImagePsText function.
Happy PostScripting!
thx,
Neil`
add a note
imagerectangle imagepsslantfont

Last updated: Fri, 26 Jan 2007
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