Modify PHP code to change background color - php

Question

I have this PHP code
if (!isset($_POST["imageSource"])) {
$_POST["imageSource"] = "test.jpg";
}
list($width, $height) = getimagesize($_POST["imageSource"]);
$viewPortW = $_POST["viewPortW"];
$viewPortH = $_POST["viewPortH"];
$pWidth = $_POST["imageW"];
$pHeight = $_POST["imageH"];
$ext = end(explode(".",$_POST["imageSource"]));
$function = returnCorrectFunction($ext);
$image = $function($_POST["imageSource"]);
$width = imagesx($image);
$height = imagesy($image);
// Resample
$image_p = imagecreatetruecolor($pWidth, $pHeight);
setTransparency($image,$image_p,$ext);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $pWidth, $pHeight, $width, $height);
imagedestroy($image);
$widthR = imagesx($image_p);
$hegihtR = imagesy($image_p);
$selectorX = $_POST["selectorX"];
$selectorY = $_POST["selectorY"];
if($_POST["imageRotate"]){
$angle = 360 - $_POST["imageRotate"];
$image_p = imagerotate($image_p,$angle,0);
$pWidth = imagesx($image_p);
$pHeight = imagesy($image_p);
//print $pWidth."---".$pHeight;
$diffW = abs($pWidth - $widthR) / 2;
$diffH = abs($pHeight - $hegihtR) / 2;
$_POST["imageX"] = ($pWidth > $widthR ? $_POST["imageX"] - $diffW : $_POST["imageX"] + $diffW);
$_POST["imageY"] = ($pHeight > $hegihtR ? $_POST["imageY"] - $diffH : $_POST["imageY"] + $diffH);
}
$dst_x = $src_x = $dst_y = $src_y = 0;
if($_POST["imageX"] > 0){
$dst_x = abs($_POST["imageX"]);
}else{
$src_x = abs($_POST["imageX"]);
}
if($_POST["imageY"] > 0){
$dst_y = abs($_POST["imageY"]);
}else{
$src_y = abs($_POST["imageY"]);
}
$viewport = imagecreatetruecolor($_POST["viewPortW"],$_POST["viewPortH"]);
setTransparency($image_p,$viewport,$ext);
imagecopy($viewport, $image_p, $dst_x, $dst_y, $src_x, $src_y, $pWidth, $pHeight);
imagedestroy($image_p);
$selector = imagecreatetruecolor($_POST["selectorW"], $_POST["selectorH"]);
setTransparency($viewport,$selector,$ext);
imagecopy($selector, $viewport, 0, 0, $selectorX, $selectorY, $_POST["viewPortW"], $_POST["viewPortH"]);
if (isset($_GET["destino"]) && !empty($_GET["destino"])) {
$file = "../../".$_GET["destino"];
} else {
$file = "test".time().".".$ext;
}
parseImage($ext,$selector,$file);
imagedestroy($viewport);
//Return value
echo $file;
/* Functions */
function determineImageScale($sourceWidth, $sourceHeight, $targetWidth, $targetHeight) {
$scalex = $targetWidth / $sourceWidth;
$scaley = $targetHeight / $sourceHeight;
return min($scalex, $scaley);
}
function returnCorrectFunction($ext){
$function = "";
switch($ext){
case "png":
$function = "imagecreatefrompng";
break;
case "jpeg":
$function = "imagecreatefromjpeg";
break;
case "jpg":
$function = "imagecreatefromjpeg";
break;
case "gif":
$function = "imagecreatefromgif";
break;
}
return $function;
}
function parseImage($ext,$img,$file = null){
switch($ext){
case "png":
imagepng($img,($file != null ? $file : ''));
break;
case "jpeg":
imagejpeg($img,($file ? $file : ''),100);
break;
case "jpg":
imagejpeg($img,($file ? $file : ''),100);
break;
case "gif":
imagegif($img,($file ? $file : ''));
break;
}
}
function setTransparency($imgSrc,$imgDest,$ext){
if($ext == "png" || $ext == "gif"){
$trnprt_indx = imagecolortransparent($imgSrc);
// If we have a specific transparent color
if ($trnprt_indx >= 0) {
// Get the original image's transparent color's RGB values
$trnprt_color = imagecolorsforindex($imgSrc, $trnprt_indx);
// Allocate the same color in the new image resource
$trnprt_indx = imagecolorallocate($imgDest, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $trnprt_indx);
// Set the background color for new image to transparent
imagecolortransparent($imgDest, $trnprt_indx);
}
// Always make a transparent background color for PNGs that don't have one allocated already
elseif ($ext == "png") {
// Turn off transparency blending (temporarily)
imagealphablending($imgDest, true);
// Create a new transparent color for image
$color = imagecolorallocatealpha($imgDest, 0, 0, 0, 127);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $color);
// Restore transparency blending
imagesavealpha($imgDest, true);
}
}
}
Comes Cropzoom tool
Currently I generated JPG images with black background color.
I need to modify it so you can change (from the code) background color of the generated image in JPG format
All other things are working properly.

Answer 1

I have solved the problem.
I used this to give background color on all parts that I considered necessary
$backgroundColor = "FF0000"; // Red, for example
$backgroundColor= '0x'.$backgroundColor;
imagefilledrectangle($FinalImage, 0 , 0 , $width , $height , ($backgroundColor*1));
The full code
// Set the Background color
$background_color = "FFFFFF";
$background_color = "0x".$background_color;
if (!isset($_POST["imageSource"])) {
$_POST["imageSource"] = "test.jpg";
}
list($width, $height) = getimagesize($_POST["imageSource"]);
$viewPortW = $_POST["viewPortW"];
$viewPortH = $_POST["viewPortH"];
$pWidth = $_POST["imageW"];
$pHeight = $_POST["imageH"];
$ext = end(explode(".",$_POST["imageSource"]));
$function = returnCorrectFunction($ext);
$image = $function($_POST["imageSource"]);
$width = imagesx($image);
$height = imagesy($image);
// Modified to set background color
$image_p = imagecreatetruecolor($pWidth, $pHeight);
// ****************************************************************
// ********** NEXT LINE IS NEW TO SET BACKGROUND COLOR **************
// ****************************************************************
imagefilledrectangle($viewport, 0, 0, $pWidth, $pHeight, ($background_color * 1));
setTransparency($image,$image_p,$ext);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $pWidth, $pHeight, $width, $height);
imagedestroy($image);
$widthR = imagesx($image_p);
$hegihtR = imagesy($image_p);
$selectorX = $_POST["selectorX"];
$selectorY = $_POST["selectorY"];
if($_POST["imageRotate"]){
$angle = 360 - $_POST["imageRotate"];
$image_p = imagerotate($image_p,$angle,0);
$pWidth = imagesx($image_p);
$pHeight = imagesy($image_p);
//print $pWidth."---".$pHeight;
$diffW = abs($pWidth - $widthR) / 2;
$diffH = abs($pHeight - $hegihtR) / 2;
$_POST["imageX"] = ($pWidth > $widthR ? $_POST["imageX"] - $diffW : $_POST["imageX"] + $diffW);
$_POST["imageY"] = ($pHeight > $hegihtR ? $_POST["imageY"] - $diffH : $_POST["imageY"] + $diffH);
}
$dst_x = $src_x = $dst_y = $src_y = 0;
if($_POST["imageX"] > 0){
$dst_x = abs($_POST["imageX"]);
}else{
$src_x = abs($_POST["imageX"]);
}
if($_POST["imageY"] > 0){
$dst_y = abs($_POST["imageY"]);
}else{
$src_y = abs($_POST["imageY"]);
}
$viewport = imagecreatetruecolor($_POST["viewPortW"],$_POST["viewPortH"]);
// ****************************************************************
// ********** NEXT LINE IS NEW TO SET BACKGROUND COLOR **************
// ****************************************************************
imagefilledrectangle($viewport, 0, 0, $_POST["viewPortW"], $_POST["viewPortH"], ($background_color * 1));
setTransparency($image_p,$viewport,$ext);
imagecopy($viewport, $image_p, $dst_x, $dst_y, $src_x, $src_y, $pWidth, $pHeight);
imagedestroy($image_p);
$selector = imagecreatetruecolor($_POST["selectorW"], $_POST["selectorH"]);
setTransparency($viewport,$selector,$ext);
imagecopy($selector, $viewport, 0, 0, $selectorX, $selectorY, $_POST["viewPortW"], $_POST["viewPortH"]);
if (isset($_GET["destino"]) && !empty($_GET["destino"])) {
$file = "../../".$_GET["destino"];
} else {
$file = "test".time().".".$ext;
}
parseImage($ext,$selector,$file);
imagedestroy($viewport);
//Return value
echo $file;
/* Functions */
function determineImageScale($sourceWidth, $sourceHeight, $targetWidth, $targetHeight) {
$scalex = $targetWidth / $sourceWidth;
$scaley = $targetHeight / $sourceHeight;
return min($scalex, $scaley);
}
function returnCorrectFunction($ext){
$function = "";
switch($ext){
case "png":
$function = "imagecreatefrompng";
break;
case "jpeg":
$function = "imagecreatefromjpeg";
break;
case "jpg":
$function = "imagecreatefromjpeg";
break;
case "gif":
$function = "imagecreatefromgif";
break;
}
return $function;
}
function parseImage($ext,$img,$file = null){
switch($ext){
case "png":
imagepng($img,($file != null ? $file : ''));
break;
case "jpeg":
imagejpeg($img,($file ? $file : ''),100);
break;
case "jpg":
imagejpeg($img,($file ? $file : ''),100);
break;
case "gif":
imagegif($img,($file ? $file : ''));
break;
}
}
function setTransparency($imgSrc,$imgDest,$ext){
if($ext == "png" || $ext == "gif"){
$trnprt_indx = imagecolortransparent($imgSrc);
// If we have a specific transparent color
if ($trnprt_indx >= 0) {
// Get the original image's transparent color's RGB values
$trnprt_color = imagecolorsforindex($imgSrc, $trnprt_indx);
// Allocate the same color in the new image resource
$trnprt_indx = imagecolorallocate($imgDest, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $trnprt_indx);
// Set the background color for new image to transparent
imagecolortransparent($imgDest, $trnprt_indx);
}
// Always make a transparent background color for PNGs that don't have one allocated already
elseif ($ext == "png") {
// Turn off transparency blending (temporarily)
imagealphablending($imgDest, true);
// Create a new transparent color for image
$color = imagecolorallocatealpha($imgDest, 0, 0, 0, 127);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $color);
// Restore transparency blending
imagesavealpha($imgDest, true);
}
}
}
It is modified after "NEXT LINE IS NEW TO SET BACKGROUND COLOR" and all the tests I've done, it works correctly