Hey, this is a great function that I spent a lot of time looking for.
What is it great for? Fading. It gives you the ability to fade any supported object (including images) totally or even specific color channels.
The project I am working on requires a series of images and backgrounds to fade into each other. As a bit of a noob, I found the doc here and it's example a little confusing.
I thought that to provide a value for a color channel would change it, but it doesn't.
To say, just change the alpha channel value, you can write it like this
<?php
$movie=new SWFMovie();
$movie->setDimension(700,150);
$movie->setBackground(0,255,255);
// image to add to movie
$img="images/example.jpg";
// add it image to movie and fade its alpha channel
$png = new SWFBitmap(fopen($img,"rb"));
$f1 = $movie->add($png);
$f1->multColor(1,1,1,0.5);
?>
This code will load the image and give it s 50% transperancy.
Similarly, one can fade a single color channel by reducing the value for that specific channel.
<?php
$ft->multColor(0.5,1,1);
?>
This makes the red channel (remember rgb) 50% transparent. You can put a 0 there to completely remove the red channel.
Hope this helps any fellow noobs trying to figure out ming out there.
SWFDisplayItem::multColor
(PHP 5 < 5.3.0, PECL ming SVN)
SWFDisplayItem::multColor — Multiplies the item's color transform
Descrição
SWFDisplayItem::multColor
( float
$red
, float $green
, float $blue
[, float $a
] ) : voidAviso
Esta função é EXPERIMENTAL. O comportamento, seu nome e documentação podem mudar sem aviso em futuras versões do PHP. Utilize por sua própria conta e risco.
swfdisplayitem::multcolor() multiplies the item's color transform by the given values.
The object may be a swfshape(), a swfbutton(), a swftext() or a swfsprite() object. It must have been added using the swfmovie::add().
Parâmetros
These parameters are floats between 0.0 and 1.0:
-
red -
Value of red component
-
green -
Value of green component
-
blue -
Value of blue component
-
a -
Value of alpha component
Valor Retornado
Não há valor retornado.
Exemplos
This simple example will modify your picture's atmosphere to Halloween (use a landscape or bright picture).
Exemplo #1 swfdisplayitem::multcolor() example
<?php
$b = new SWFBitmap(file_get_contents("backyard.jpg"));
// note use your own picture :-)
$s = new SWFShape();
$s->setRightFill($s->addFill($b));
$s->drawLine($b->getWidth(), 0);
$s->drawLine(0, $b->getHeight());
$s->drawLine(-$b->getWidth(), 0);
$s->drawLine(0, -$b->getHeight());
$m = new SWFMovie();
$m->setDimension($b->getWidth(), $b->getHeight());
$i = $m->add($s);
for ($n=0; $n<=20; ++$n) {
$i->multColor(1.0-$n/10, 1.0, 1.0);
$i->addColor(0xff*$n/20, 0, 0);
$m->nextFrame();
}
header('Content-type: application/x-shockwave-flash');
$m->output();
?>
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Anonymous ¶
15 years ago
