imagepolygon
in my code below, there is an error!
replace
$w += abs($bb[3])-abs($bb[1]); // accumulate width
with
$w += abs($bb[2])-abs($bb[0]); // accumulate width
also after
$bb = imagepsbbox($c, $font, $size); // calculate width
you can add this line because spaces make odd values...
if ($c == ' ' ) $bb = imagepsbbox('i', $font, $size);
imagepsbbox
(PHP 4, PHP 5)
imagepsbbox — Entregar la cada circundante de un rectángulo de texto usando fuentes PostScript Type1
Descripción
array imagepsbbox
( string $texto
, int $fuente
, int $tamanyo
[, int $espacio
], int $ajuste
, float $angulo
)
Entrega la caja circundante de un rectángulo de texto usando fuentes PostScript Type1.
La caja circundante es calculada usando información disponible de las métricas de caracteres, y desafortunadamente tiende a diferir un poco de los resultados conseguidos al rasterizar el texto. Si el ángulo es 0 grados, puede esperar que el texto necesite 1 pixel más en cada dirección.
Lista de parámetros
- texto
-
- font
-
Can be 1, 2, 3, 4, 5 for built-in fonts in latin2 encoding (where higher numbers corresponding to larger fonts) or any of your own font identifiers registered with imageloadfont().
- tamanyo
-
tamanyo es expresado en pixeles.
- espacio
-
Le permite modificar el valor predeterminado de un espacio en una fuente. Esta cantidad es agregada al valor normal y puede ser negativa también. Expresada en unidades de espacio de caracter, en donde 1 unidad es 1 milésimo de un cuadro em.
- ajuste
-
ajuste le permite controlar la cantidad de espacio en blanco entre caracteres. Esta cantidad es agregada al ancho normal de caracter y puede ser negativa también. Expresada en unidades de espacio de caracter, en donde 1 unidad es 1 milésimo de un cuadro em.
- angulo
-
angulo en grados.
Valores retornados
Devuelve una matriz que contiene los siguientes elementos:
| 0 | coordenada x izquierda |
| 1 | coordenada y superior |
| 2 | coordenada x derecha |
| 3 | coordenada y inferior |
Notes
Note: Esta funcion esta disponible solamente si PHP se ha compilado usando la opcion --with-t1lib[=DIR].
add a note
User Contributed Notesimagepsbbox
eikie
05-May-2008 09:32
05-May-2008 09:32
eikie
05-May-2008 08:34
05-May-2008 08:34
I have a given image width and need to render a long string on that image. By using the following function I'm, able to get an array of strings which each will fit into the images width. It might need a lot of CPU time, but it's cool:
// Function to return an Array of Strings
// Arguments: String to be wrapped, maximum width in pixels of each line, font and fontsize
function imgwordwrap($s, $maxWidth, $font, $size) {
// Make an empty ArrayList
$a = array();
$w = 0; // Accumulate width of chars
$i = 0; // Count through chars
$rememberSpace = 0; // Remember where the last space was
// As long as we are not at the end of the String
while ($i < strlen($s)) {
// Current char
$c = substr($s, $i, 1);
$bb = imagepsbbox($c, $font, $size); // calculate width
$w += abs($bb[3])-abs($bb[1]); // accumulate width
if ($c == ' ') $rememberSpace = $i; // Are we a blank space?
if ($w > $maxWidth) { // Have we reached the end of a line?
$sub = substr($s,0,$rememberSpace); // Make a substring
// Chop off space at beginning
if (substr($sub,0,1)==' ') $sub = substr($sub,1);
// Add substring to the array
$a[] = $sub;
// Reset everything
$s = substr($s,$rememberSpace);
$i = 0;
$w = 0;
}
else {
$i++; // Keep going!
}
}
// Take care of the last remaining line
trim($s);
if (substr($s,0,1)==' ') $s = substr($s,1);
$a[] = $s;
return $a;
}
honza dot bartos at gmail dot com
23-Oct-2006 02:25
23-Oct-2006 02:25
When using imagepsbbox, keep in mind, that meaning of y-coordinates is slightly different here. Y-coordinates returned by this function are related to the baseline of the text starting at point [0,0]. Positive values represent points ABOVE the baseline, negative values represent points BELOW the baseline. That is why the lower left y-coordinate is always smaller here than the upper right y-coordinate (these two coordinates are actualy values of metrics.descent and metrics.ascent - see T1Lib docs).
So when you want to place some text using coordinates of the top left corner (for example [100,100]), use this:
<?php
$x = 100;
$y = 100;
$text = "Dodge this";
$fontsize=18;
$font=imagepsloadfont("somefont.pfb");
list($lx,$ly,$rx,$ry) = imagepsbbox($text,$font,$fontsize);
imagepstext ($someimage, $text, $font, $fontsize, $somecolor, $somecolor, $x, $y + $ry);
?>
Hope it helps someone, I got stuck with this for a while.
daniel at dantec dot NO_SPAM dot nl
17-Apr-2002 09:23
17-Apr-2002 09:23
When using imagepsbbox, you are probably trying to do something like creating a button with text, so that the button is large enough for the text...
Below is a very simple example of making a black button just big enough to display white text on it.
<?php
//if text is no variable set sample text
if (!$text)
$text = "This is a sample text";
// set the font size
$fontsize=14;
// load the font to use
$font=ImagePsLoadFont("/fonts/ariam___.pfb");
//get the left lower corner and the right upper
list($lx,$ly,$rx,$ry) = imagepsbbox($text,$font,$fontsize,0,0,0);
// calculate the size of the text
$textwidth = $rx - $lx;
$textheight = $ry - $ly;
// make an image 40 pixels wider and 20 pixels higher than the text
$imh = $textheight + 20;
$imw = $textwidth + 40;
$im = imageCreate( $imw, $imh );
//define colors, first color is used as background color!
$black = ImageColorAllocate ($im, 0, 0, 0);
$white = ImageColorAllocate ($im, 255, 255, 255);
//create the text (with the same parameters as imagepsbbox!)
ImagePSText ($im, "$text", $font, $fontsize, $white, $white, 20, 20,'','','',4);
//send the header
header("Content-type: image/jpeg");
// create the image
ImageJPEG ($im,"",100);
//destroy the image & font to free memory
Imagepsfreefont ( $font );
ImageDestroy ( $im );
?>