Php png to animated gif

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mrhid6
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Php png to animated gif

Post by mrhid6 »

ok so i need some help, so i have 3 images "up1.png" "up2.png" and "up3.png" i want to make it animate and then save it as a animated gif i have tried Gifencoder.class.php and that made the animation have a white background and i want a Transparent background.

Thanks in advance Mrhid6
mikeashfield
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Re: Php png to animated gif

Post by mikeashfield »

You've considered the fact that if up1.png, up2.png and up3.png have white backgrounds, then that's going to be the resulting background in your animation right?
mrhid6
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Re: Php png to animated gif

Post by mrhid6 »

Yea the png have transparent background
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requinix
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Re: Php png to animated gif

Post by requinix »

Since PHP's GD doesn't do animated GIFs I assume the Gifencoder thing deals with the image byte by byte. Which isn't hard, just tedious. However GD doesn't do well with palette images, and alpha transparency in PNGs doesn't quite map to the all-or-nothing transparency that GIFs require...

What's the source of Gifencoder.class.php? According to phpclasses.org it's freeware but I'm not going to register just to look at one darn file.
mrhid6
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Re: Php png to animated gif

Post by mrhid6 »

Code: Select all

<?php
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
::	GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
::
::	This class is a rewritten 'GifMerge.class.php' version.
::
::  Modification:
::   - Simplified and easy code,
::   - Ultra fast encoding,
::   - Built-in errors,
::   - Stable working
::
::
::	Updated at 2007. 02. 13. '00.05.AM'
::
::
::
::  Try on-line GIFBuilder Form demo based on GIFEncoder.
::
::  http://gifs.hu/phpclasses/demos/GifBuilder/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/

Class GIFEncoder {
	var $GIF = "GIF89a";		/* GIF header 6 bytes	*/
	var $VER = "GIFEncoder V2.05";	/* Encoder version		*/

	var $BUF = Array ( );
	var $LOP =  0;
	var $DIS =  2;
	var $COL = -1;
	var $IMG = -1;

	var $ERR = Array (
		ERR00=>"Does not supported function for only one image!",
		ERR01=>"Source is not a GIF image!",
		ERR02=>"Unintelligible flag ",
		ERR03=>"Does not make animation from animated GIF source",
	);

	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFEncoder...
	::
	*/
	function GIFEncoder	(
							$GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,
							$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod
						) {
		if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_tim ) ) {
			printf	( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
			exit	( 0 );
		}
		$this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
		$this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2;
		$this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ?
						( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1;

		for ( $i = 0; $i < count ( $GIF_src ); $i++ ) {
			if ( strToLower ( $GIF_mod ) == "url" ) {
				$this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
			}
			else if ( strToLower ( $GIF_mod ) == "bin" ) {
				$this->BUF [ ] = $GIF_src [ $i ];
			}
			else {
				printf	( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
				exit	( 0 );
			}
			if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != "GIF89a" ) {
				printf	( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] );
				exit	( 0 );
			}
			for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) {
				switch ( $this->BUF [ $i ] { $j } ) {
					case "!":
						if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
							printf	( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
							exit	( 0 );
						}
						break;
					case ";":
						$k = FALSE;
						break;
				}
			}
		}
		GIFEncoder::GIFAddHeader ( );
		for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
			GIFEncoder::GIFAddFrames ( $i, $GIF_dly [ $i ] );
		}
		GIFEncoder::GIFAddFooter ( );
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFAddHeader...
	::
	*/
	function GIFAddHeader ( ) {
		$cmap = 0;

		if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) {
			$cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) );

			$this->GIF .= substr ( $this->BUF [ 0 ], 6, 7		);
			$this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap	);
			$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . GIFEncoder::GIFWord ( $this->LOP ) . "\0";
		}
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFAddFrames...
	::
	*/
	function GIFAddFrames ( $i, $d ) {

		$Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) );

		$Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1;
		$Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end );

		$Global_len = 2 << ( ord ( $this->BUF [ 0  ] { 10 } ) & 0x07 );
		$Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );

		$Global_rgb = substr ( $this->BUF [ 0  ], 13,
							3 * ( 2 << ( ord ( $this->BUF [ 0  ] { 10 } ) & 0x07 ) ) );
		$Locals_rgb = substr ( $this->BUF [ $i ], 13,
							3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) );

		$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 0 ) .
						chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0";

		if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) {
			for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) {
				if	(
						ord ( $Locals_rgb { 3 * $j + 0 } ) == ( ( $this->COL >> 16 ) & 0xFF ) &&
						ord ( $Locals_rgb { 3 * $j + 1 } ) == ( ( $this->COL >>  8 ) & 0xFF ) &&
						ord ( $Locals_rgb { 3 * $j + 2 } ) == ( ( $this->COL >>  0 ) & 0xFF )
					) {
					$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 1 ) .
									chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . chr ( $j ) . "\x0";
					break;
				}
			}
		}
		switch ( $Locals_tmp { 0 } ) {
			case "!":
				$Locals_img = substr ( $Locals_tmp, 8, 10 );
				$Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
				break;
			case ",":
				$Locals_img = substr ( $Locals_tmp, 0, 10 );
				$Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
				break;
		}
		if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) {
			if ( $Global_len == $Locals_len ) {
				if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
					$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
				}
				else {
					$byte  = ord ( $Locals_img { 9 } );
					$byte |= 0x80;
					$byte &= 0xF8;
					$byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
					$Locals_img { 9 } = chr ( $byte );
					$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
				}
			}
			else {
				$byte  = ord ( $Locals_img { 9 } );
				$byte |= 0x80;
				$byte &= 0xF8;
				$byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
				$Locals_img { 9 } = chr ( $byte );
				$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
			}
		}
		else {
			$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
		}
		$this->IMG  = 1;
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFAddFooter...
	::
	*/
	function GIFAddFooter ( ) {
		$this->GIF .= ";";
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFBlockCompare...
	::
	*/
	function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {

		for ( $i = 0; $i < $Len; $i++ ) {
			if	(
					$GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
					$GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
					$GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
				) {
					return ( 0 );
			}
		}

		return ( 1 );
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GIFWord...
	::
	*/
	function GIFWord ( $int ) {

		return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
	}
	/*
	:::::::::::::::::::::::::::::::::::::::::::::::::::
	::
	::	GetAnimation...
	::
	*/
	function GetAnimation ( ) {
		return ( $this->GIF );
	}
}
?>
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requinix
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Re: Php png to animated gif

Post by requinix »

Ugh. Cryptic. I can't tell if it handles transparency because it's so obfuscated, but if not then it'll be a chore to add it to that code.

If I were you I'd just drop the whole thing and use ImageMagick instead.
mrhid6
Forum Newbie
Posts: 5
Joined: Mon Nov 07, 2011 5:36 pm

Re: Php png to animated gif

Post by mrhid6 »

ok so what is ImageMagick and how i get/use it?
mikeashfield
Forum Contributor
Posts: 159
Joined: Sat Oct 22, 2011 10:50 am

Re: Php png to animated gif

Post by mikeashfield »

Don't you know about Google? It's this clever thing called a search engine. Say for example if you type ImageMagick in the search box, it searches the internet for possible matches! Look what I found using it!: http://php.net/manual/en/book.imagick.php :banghead:
mrhid6
Forum Newbie
Posts: 5
Joined: Mon Nov 07, 2011 5:36 pm

Re: Php png to animated gif

Post by mrhid6 »

Orite i know google, google is my friend ... but how does this solve my problem, i have look at imagemagick but dont know how to install it?
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