The SWFGradient class

(PHP 5 <= 5.3.0, PECL ming SVN)

Introduction

SWFGradient.

Class synopsis

SWFGradient {

/* Methods */

void addEntry ( float $ratio , int $red , int $green , int $blue [, int $alpha = 255 ] )

__construct ( void )

}

SWFGradient::addEntry — Adds an entry to the gradient list
SWFGradient::__construct — Creates a gradient object

Коментарии

Mar 13

Автор: mabuzzer at hotmail dot com


Gradient fills are implemented in SWF as a color ramp, mapped onto a square from (-16384, -16384) to (16384, 16384) TWIPS.



The following code creates a movie, displaying a square with a gradient fill, correctly scaled to the size of the shape.



<?php



//Set the scale to TWIPS rather than PIXELS

ming_setscale(1.0);



//Create the movie

$m = new SWFMovie();

$m->setRate(12.0);

$m->setDimension(400,400);

$m->setBackground(0xff, 0xff, 0xff);



//Width and height of rectangle

$sx = 300;

$sy = 300;



//Create rectangle

$s = new SWFShape();



//Gradient file stuff here...

$g = new SWFGradient();

$g->addEntry(0.0, 0x00, 0x00, 0xff);    // Start off Blue

$g->addEntry(1.0, 0xff, 0xff, 0x00);    // Finish off Yellow



// Add gradient fill to the shape

$f = $s->addFill($g);



//Centre the gradient fill against the rectangle

$f->moveTo($sx/2, $sy/2);

//Scale it to the shape, so that the entire gradient fits inside the shape

$f->scaleTo($sx/32768, 1);



// Set the shapes fill to be the added gradient fill

$s->setRightFill($f);



//Draw the rectangle

$s->drawLine($sx, 0);

$s->drawLine(0, $sy);

$s->drawLine(-$sx, 0);

$s->drawLine(0, -$sy);



//Add the shape to the movie

$sh = $m->add($s);

$sh->moveTo(50, 50);



// Output the movie

header("Content-type: application/x-shockwave-flash");

$m->output();



?>



More info about this can be obtained from 

http://www.openswf.org/spec/SWFfilereference.html#h4FillTypes