PHP 5.6.0 released

SWFDisplayItem::multColor

(PHP 4 >= 4.0.5)

SWFDisplayItem::multColorMultiplies the item's color transform

Descrizione

void SWFDisplayItem::multColor ( float $red , float $green , float $blue [, float $a ] )
Avviso

Questa funzione è SPERIMENTALE. Ovvero, il comportamento di questa funzione, il nome di questa funzione, in definitiva tutto ciò che è documentato qui può cambiare nei futuri rilasci del PHP senza preavviso. Siete avvisati, l'uso di questa funzione è a vostro rischio.

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().

Elenco dei parametri

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

Valori restituiti

Nessun valore viene restituito.

Esempi

This simple example will modify your picture's atmosphere to Halloween (use a landscape or bright picture).

Example #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/101.01.0);
  
$i->addColor(0xff*$n/2000);
  
$m->nextFrame();
}

header('Content-type: application/x-shockwave-flash');
$m->output();
?>

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Anonymous
5 years ago
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.
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