I need to change the color of the background of the ImageCreateTrueColor to white and then put an image on it
elseif(($height>50)&&($width<50))
{
$img_r = imagecreatefromjpeg($new_img_path);
$source = ImageCreateTrueColor(50, 50);
imagetruecolortopalette($source, FALSE, 2);
$bg = imagecolorat($source, 0, 0);
imagecolorset($source, $bg, 0, 0, 255);
// $white = imagecolorallocate($source,255,255,255);
// imagefilledrectangle($source, 0, 0, 50, 50, $white);
imagecopy($source, $img_r,0,0,0,0,$width,50);
header('Content-type: image/jpeg');
imagejpeg($source, $small_new_img_path);
here is the blue, but it doesn't matter, it doesn't put the image on the blue background
You want to create a png not a JPEG. Use imagepng and imagesavealpha.
See full example.
Related
I need to combine two images in PHP. Master picture is in PNG, secondary in JPG.
First picture:
(source: grafikstudio-m.com)
Secondary picture:
(source: grafikstudio-m.com)
Test:
http://happywin.konektor.grafikstudio-m.com/imageMerge/
<?php
$dest = imagecreatefrompng('muster.png');
$src = imagecreatefromjpeg("test.jpg");
imagecolortransparent($src);
imagesavealpha($dest, false);
imagealphablending($src, true);
imagesavealpha($src, true);
imagecopymerge($dest, $src, 0, 0, 0, -100, 2000, 1300, 50);
header('Content-Type: image/png');
imagepng($dest);
imagedestroy($dest);
imagedestroy($src);
I need the pictures to be connected and with a white background
Create a canvas image with same size as muster.png and fill it with white color.
$muster = imagecreatefrompng('muster.png');
$canvas = imagecreatetruecolor(imagesx($muster), imagesy($muster));
$white = imagecolorallocate($canvas, 255, 255, 255);
imagefill($canvas, 0, 0, $white);
Open test.jpg and use the top-left pixel color as the transparent color.
$test = imagecreatefromjpeg('test.jpg');
imagecolortransparent($test, imagecolorallocate($test, 255, 255, 255));
Copy the 2 images to the canvas, the order is optional, notice that copy muster.png (truecolor) with imagecopy but copy test.jpg (pallete) with imagecopymerge.
imagecopy($canvas, $muster, 0, 0, 0, 0, imagesx($muster), imagesy($muster));
imagecopymerge($canvas, $test, 0, 100, 0, 0, imagesx($test), imagesy($test), 100);
header('Content-Type: image/png');
imagepng($canvas);
// ...destroy
I've tried a few times but I can't seem to get 2 centered lines of text at the bottom of this image on the transparent background
Any suggestions?
<?php
$filePath = "adopt.png"; //full path to your png, including filename and extension
$img = #imagecreatefrompng($filePath);
$width = imagesx($img);
$height = imagesy($img);
//create new image and fill with background color
$backgroundImg = #imagecreatetruecolor($width, $height);
imagecopy($backgroundImg, $img, 0, 0, 0, 0, 100, 130);
$color = imagecolorallocatealpha($backgroundImg, 0, 0, 0, 127); //fill transparent back
imagefill($backgroundImg, 0, 0, $color);
//save as png
header( "Content-type: image/png" );
imagepng( $backgroundImg );
imagedestroy( $backgroundImg );
?>
This process works. Without your code I can only regurgitate the example from the manual to you. http://php.net/manual/en/function.imagestring.php. But it works, I have used the imagestring function. It accepts co-ordinates for the text so I can not see why it would not work for you.
<?php
// Create a 100*30 image
$im = imagecreate(100, 30);
// White background and blue text
$bg = imagecolorallocate($im, 255, 255, 255);
$textcolor = imagecolorallocate($im, 0, 0, 255);
// Write the string at the top left
imagestring($im, 5, 0, 0, 'Hello world!', $textcolor);
// Output the image
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>
First: I want to create a PNG image and draw a shape inside it.
Second: Overlap the first PNG on another image (for example a jpg image)
The problem is: When I create the first PNG with a shape inside (the background is not transparent and is dark) so this make a black overlap on second image.
How can I fix it?
I don’t work so much with images function so I got trouble.
Notes: I need to create the first transparent PNG and then overlap it on second image. I don’t want to create shape directly on second image.
And The Code:
<?php
define('EXAMPLE_TMP_SERVERPATH', '');
define('EXAMPLE_TMP_URLRELPATH', '');
$tempDir = EXAMPLE_TMP_SERVERPATH;
$fileName = 'test3img.png';
$imgW = 125;
$imgH = 125;
# First
$base_image = imagecreatetruecolor($imgW, $imgH);
$black = imagecolorallocate($base_image, 0, 0, 0);
imagecolortransparent($base_image, $black);
$col[0] = imagecolortransparent($base_image, $black);
imagealphablending($base_image, true);
imagesavealpha($base_image, true);
imagefill($base_image, 0, 0, $col[0]);
imagefilledrectangle($base_image, 4, 4, 50, 25, 255);
imagepng($base_image, $tempDir.$fileName);
# First2
$target_image = imagecreatetruecolor($imgW*5, $imgH*5);
$black2 = imagecolorallocatealpha($base_image, 0, 0, 0, 127);
imagecolortransparent($target_image, $black2);
imagecopyresized($target_image, $base_image, 0, 0, 0, 0,$imgW, $imgH, $imgW, $imgH);
imagedestroy($base_image);
imagepng($target_image, $tempDir.$fileName);
imagedestroy($target_image);
# First2
# Second
$dest = imagecreatefromjpeg('../avatar.jpg');
$src = imagecreatefrompng(EXAMPLE_TMP_URLRELPATH.$fileName);
imagealphablending($dest, true);
imagesavealpha($dest, true);
imagealphablending($src, true);
imagecopyresampled(
$dest,
$src,
0,0,
0,0,
200, 200,
125, 125
);
imagepng($dest, EXAMPLE_TMP_URLRELPATH.'_m.jpeg');
imagedestroy($dest);
imagedestroy($src);
?>
Need to add the alpha channel too:
Alpha Channel
I am trying to write text onto a png, however when I do it puts a dark border around it, I am not sure why.
The original image:
The processed image:
Code:
// Load the image
$im = imagecreatefrompng("admin/public/images/map/order/wally.png");
// If there's an error, gtfo
if(!$im) {
die("");
}
$textColor = imagecolorallocate($im, 68, 68, 68);
$width = imagesx($im);
$height = imagesy($im);
$fontSize = 5;
$text = "AC";
// Calculate the left position of the text
$leftTextPos = ($width - imagefontwidth($fontSize)*strlen($text)) / 2;
// Write the string
imagestring($im, $fontSize, $leftTextPos, $height-28, $text, $textColor);
// Output the image
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
I've had this issue several times, let me find the answer...
Ok, found something:
imagesavealpha($im, true);
imagealphablending($im, true);
Write that before imagepng.
Yes, saving with alpha is important but loading it is important as well. Your PNG image might have transparency but it is good practice to account for that as well.
You'd need to create true color image, set alpha color and then draw your loaded image with text over it. So something like this:
// create true color image
$img = imagecreatetruecolor($width, $height);
$transparent_color = imagecolorallocatealpha($img, 255, 255, 255, 0);
imagealphablending($img, false);
imagefillrectangle($img, 0, 0, $width, $height, $transparent_color);
imagealphablending($img, true);
// draw previously loaded PNG image
imagecopy($img, $loaded_img, 0, 0, 0, 0, $width, $height);
// draw your text
// save the whole thing
imagesavealpha($img, true);
imagepng($img, $file);
What is the best way to replace transparent colors with white in gif and png images with php?
// get transparent color indexes
$trsp = ImageColorsForIndex($image, ImageColorTransparent($image));
// get transparent color set
$delete = imagecolorallocate($image, $trsp['red'], $trsp['green'], $trsp['blue']);
// replace
imagecolorset($image, $delete, 255, 255, 255);
does not working.
I don't really use GD all that much - I prefer ImageMagick. The following method works, but I'm not sure if it is the most efficient:
// Get the original image.
$src = imagecreatefrompng('trans.png');
// Get the width and height.
$width = imagesx($src);
$height = imagesy($src);
// Create a white background, the same size as the original.
$bg = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($bg, 255, 255, 255);
imagefill($bg, 0, 0, $white);
// Merge the two images.
imagecopyresampled(
$bg, $src,
0, 0, 0, 0,
$width, $height,
$width, $height);
// Save the finished image.
imagepng($bg, 'merged.png', 0);