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  Tutorial: PHP GD Color Transparency Using Alpha Blending

PHP GD Color Transparency Using Alpha Blending


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This example shows how to do Color Transparency Using Alpha Blending in php gd.

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PHP GD Color Transparency Using Alpha Blending

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PHP GD Color Transparency Using Alpha Blending

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PHP GD Color Transparency Using Alpha Blending
<?php define("WIDTH", 300); define("HEIGHT", 300); $img = imagecreatetruecolor(WIDTH, HEIGHT); $black = imagecolorallocate($img, 0, 0, 0); $yellow = imagecolorallocate($img, 0xFF, 0xFF, 00); $red
 
PHP GD alpha
<?php $size = 300; $image=imagecreatetruecolor($size, $size); $back = imagecolorallocate($image, 255, 255, 255); $border = imagecolorallocate($image, 0, 0, 0); imagefilledrectangle($image, 0, 0, $size - 1, $size
 
PHP GD Replace Color
<?php $image = "images.jpg"; $data = getimagesize($image... = imagecreatefromJPEG($image); $color = imagecolorallocate($im,hexdec(substr($hex,0,2...,$cloneH, $oldhex) ) imagesetpixel($im, $x, $cloneH, $color); } }  
 
php gd background color
<?php header("Content-type: image/png"); $width = 350; $height = 360; $im = ImageCreateTrueColor($width, $height); $red = ImageColorAllocate($im, 255, 0, 0); ImageFillToBorder($im, 0, 0, $red, $red
 
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. To give blending and transparency effects with graphics and images and the alpha... .style1 { margin-right: 76px; } Show Alpha Value and Alpha Rules      
 
PHP GD draw line
<?php header ("Content-type: image/jpeg"); $handle = ImageCreate (130, 50) or die ("Cannot Create image"); $bg_color = ImageColorAllocate ($handle, 255, 0, 0); $txt_color = ImageColorAllocate
 
PHP GD image negative Color
<?php function negate($image) { if(function_exists('imagefilter... = imagecolorat($image, $x, $y); $rgb = imagecolorsforindex($index); $color... - $rgb['blue']); imagesetpixel($im, $x, $y, $color); } } return(true
 
PHP GD Captcha Refersh
['blue'] == 0 && $color_tran['alpha'] == 0) ; if($captcha_ok...index.php <?php session_start(); if(isset($_POST['submit_x']) &...']; $y = $_POST['submit_y']; $rgb = imagecolorat($captcha_image, $x, $y); $color
 
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<?php echo '<pre> '; print_r(gd_info()); echo '</pre> '; ?> After running the program you will get the following output Array ( [GD Version] => bundled (2.0.34 compatible) [FreeType Support
 
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model and transparency. There is a Color Chooser in Java 2 that lets the user... to create new colors, and predefines a few color constants (see below... monitors (and TVs) to create all colors using the RGB system
 
PHP GD Colorization of image
<?php $im = imagecreatefromjpeg('images.jpg'); if($im && imagefilter($im, IMG_FILTER_COLORIZE, 0, 255, 0)) { echo 'Image successfully shaded green.'; imagejpeg($im, 'images.jpg'); imagedestroy($im); } else
 
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How to implement Captcha in PHP Form using GD Library  Hi, How to show Captcha in PHP Form. So, please suggest any online reference so that i will try myself. Thanks
 
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PHP GD captcha
initialize new GD image stream'); $background_color = imagecolorallocate($image, 255, 255, 255); $text_color = imagecolorallocate($image, 20, 40, 100... <?php session_start(); class CaptchaSecurityImages { var $font
 
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PHP GD font size
<?php header ("Content-type: image/png"); $handle = ImageCreate (130, 50) or die ("Cannot Create image"); $bg_color = ImageColorAllocate ($handle, 255, 0, 0); $txt_color = ImageColorAllocate
 
PHP GD copy of image
<?php $src = imagecreatefromjpeg('images.jpg'); $dest = imagecreatetruecolor(80, 40); imagecopy($dest, $src, 0, 0, 20, 13, 80, 40); header('Content-Type: image/jpeg'); imagejpeg($dest); imagedestroy($dest
 
php gd Wbmp
<?php $im = imagecreatetruecolor(120, 20); $text_color = imagecolorallocate($im, 225, 0, 0); imagestring($im, 1, 5, 5, 'Roseindia', $text_color); imagewbmp($im, 'simpletext.wbmp'); echo "Wbmp file created
 
PHP GD imagesetbrush() Function
<?php $php = imagecreatefromjpeg('im.jpg'); $im...); imagefilledrectangle($im, 0, 0, 299, 99, $white); imagesetbrush($im, $php); imageline($im, 50, 50, 50, 60, IMG_COLOR_BRUSHED); header('Content-type: image/jpeg
 
PHP GD Pie Chart
<?php $image = imagecreatetruecolor(300, 300); $white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); $gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0); $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90
 
PHP GD Gradient Fill
<?php $image = ImageCreate(200, 200); for($i=0; $i<255; $i++) { $background_color = ImageColorAllocate($image, $i, $i, $i); } $text_color = ImageColorAllocate($image, 255, 255, 255); $tekst = "
 
PHP GD image to text
<?php $file = imagecreatefromjpeg("image1.jpg"); $bw = 0...-family:monospace; background-color: #000000;\">"; for ($y=0;$y<...;; } echo "<span style=\"color:#".$grid[$x][$y]."\"
 
PHP GD set image title
<?php $zend = imagecreatefromjpeg('images.jpg'); $im = imagecreatetruecolor(200, 200); imagesettile($im, $zend); imagefilledrectangle($im, 0, 0, 199, 199, IMG_COLOR_TILED); header('Content-Type: image/jpeg'); imagejpeg
 
PHP GD brush style coloring
<?php define("WIDTH", 200); define("HEIGHT", 200..., HEIGHT-1, IMG_COLOR_STYLED); imageline($img, 0, HEIGHT-1, WIDTH-1, 0, IMG_COLOR..., HEIGHT-31, IMG_COLOR_STYLED); imagerectangle($img, 50, 50, WIDTH-51
 
PHP GD tilled filled colors
<?php define("WIDTH", 200); define("HEIGHT", 200); define("T_WIDTH", 20); define("T_HEIGHT",20); $img...); imagefilledrectangle($img, 1, 1, WIDTH-2, HEIGHT-2, IMG_COLOR_TILED); header
 
PHP GD Add Border to image
<?php $im = imagecreate(200, 60); $bg = imagecolorallocate($im, 225, 225, 225); $textcolor = imagecolorallocate($im, 0, 0, 255... = imagecolorallocate($im, 255, 255, 20); //Define border color Yellow $x = 0
 
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<?php $x = 200; $y = 200; $gd = imagecreatetruecolor($x, $y...; 190); $red = imagecolorallocate($gd, 255, 255, 255); for ($i = 0; $i < 100000; $i++) { imagesetpixel($gd, round($x),round($y), $red
 
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<?php $img = imagecreatetruecolor(300, 200); echo imagesy($img); ?> After running the program you will get the following output OUTPUT:200
 
PHP GD imagesx
<?php $img = imagecreatetruecolor(300, 200); echo imagesx($img); ?> After running the program you will get the following output OUTPUT :300
 
PHP GD rotate image
<?php $image = 'images.jpg'; $degrees = 180; header('Content-type: image/jpeg') ; $source = imagecreatefromjpeg($image) ; $rotate = imagerotate($source, $degrees, 0) ; imagejpeg($rotate) ; ?> After running
 
PHP GD Hue an Image
<?php $im = imagecreatefromJPEG('images.jpg'); echo 'Hue white& black:' . imagecolorclosesthwb($im, 116, 115, 152); imagedestroy($im); ?> After running the program you will get the following output OUTPUT:Hue
 
PHP GD crop image
<?php $src = imagecreatefromjpeg('image1.jpg'); $dest = imagecreatetruecolor(80, 40); imagecopy($dest, $src, 0, 0, 20, 13, 80, 40); header('Content-Type: image/jpeg'); imagegif($dest); imagedestroy($dest
 
PHP GD imagettfbox
<?php $im = imagecreatetruecolor(300, 150); $black...'; $bbox = imagettfbbox(10, 45, $font, 'PHP version ' . phpversion..., $black, $font, 'PHP version ' . phpversion()); $bbox = imagettfbbox(10
 
PHP GD Merge Image
<?php $backgroundSource = "merge.jpg"; $feedBurnerStatsSource = "images.jpg"; $outputImage = imagecreatefromjpeg($backgroundSource); $feedBurnerStats = imagecreatefromjpeg($feedBurnerStatsSource
 
PHP GD image convolution
<?php $image = imagecreatefromjpeg('images.jpg'); $emboss = array(array(2, 0, 0), array(0, -1, 0), array(0, 0, -1)); imageconvolution($image, $emboss, 1, 127); header('Content-Type: image/jpeg'); imagejpeg($image
 
PHP GD fill image
<?php $im = imagecreatetruecolor(55, 30); $white = imagecolorallocate($im, 255, 255, 255); imagefilledrectangle($im, 4, 4, 50, 25, $white); imagejpeg($im, 'imagefilledrectangle.jpg'); echo("Image filled
 
PHP GD filters
<?php try{ if(!$image=imagecreatefromjpeg('images.jpg')){ throw new Exception('Error creating image'); } if(!imagefilter($image,IMG_FILTER_COLORIZE,255,0,0)){ throw new Exception(" Can't filter image"); } header
 
PHP GD image filter
<?php $logo1 = imagecreatefromjpeg('images.jpg'); $logo2 = imagecreatefromjpeg('images.jpg'); $output = imagecreatetruecolor(imagesx($logo1) * 2, imagesy($logo1)); imagefilter($logo1, IMG_FILTER_PIXELATE, 3); imagefilter
 
PHP GD imagettftext
<?php header('Content-type: image/png'); $im = imagecreatetruecolor(400, 30); $white = imagecolorallocate($im, 255, 255, 255); $grey = imagecolorallocate($im, 128, 128, 128); $black = imagecolorallocate($im, 0, 0
 
PHP GD draw text
<?php header('Content-type: image/png'); $im = imagecreatetruecolor(400, 30); $white = imagecolorallocate($im, 255, 255, 255); $grey = imagecolorallocate($im, 128, 128, 128); $black = imagecolorallocate($im, 0, 0
 
PHP GD bold text
<?php header('Content-type: image/png'); $image = imagecreatetruecolor(400, 30); $red = imagecolorallocate($image, 255, 0, 0); $grey = imagecolorallocate($image, 128, 128, 128); $black = imagecolorallocate($image
 
PHP GD watermark an Image
<?php ini_set("display_errors", "1"); error_reporting(E_ALL); $image_src = 'images.jpg'; $watermark_src = 'watermark.jpg'; $opacity = 30; $padding = 20; $image = imagecreatefromjpeg($image_src
 
PHP GD art
<?php $width=200; $height=200; Header("Content-type: image/jpeg"); $im = imagecreate($width,$height); $white=ImageColorAllocate($im,255,255,255); $blue=ImageColorAllocate($im,1,18,250); $red=ImageColorAllocate
 
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