php gd - Mask over image -


i want replace transparent pixels of image mask, i'm using function keep getting errors.

when try:

<?php  function image_mask($src, $mask) {   imagesavealpha($src, true); imagealphablending($src, false); // scan image pixels // imagesx = image width ($x = 0; $x < imagesx($src); $x++) {     // imagesy = image height     ($y = 0; $y < imagesy($src); $y++) {         $mask_pix = imagecolorat($mask,$x,$y);         //return r,g,b,alpha         $mask_pix_color = imagecolorsforindex($mask, $mask_pix);         if ($mask_pix_color['alpha'] < 127) {             $src_pix = imagecolorat($src,$x,$y);             $src_pix_array = imagecolorsforindex($src, $src_pix);             imagesetpixel($src, $x, $y, imagecolorallocatealpha($src, $src_pix_array['red'], $src_pix_array['green'], $src_pix_array['blue'], 127 - $mask_pix_color['alpha']));         }     } }  } image_mask('source.png', 'mask.png');  ?>

i following errors:

warning: imagesavealpha() expects parameter 1 resource, string given in ... on line 7  warning: imagealphablending() expects parameter 1 resource, string given in ... on line 8  warning: imagesx() expects parameter 1 resource, string given in ... on line 11

i tried adding imagecreatefrompng , header('content-type: image/png'); images empty page.

i don`t know result want , , feel page show wrong . can try run program

<?php  header('content-type: image/png');  function image_mask(&$src, &$mask) {      imagesavealpha($src, true);     imagealphablending($src, false);     // scan image pixels     // imagesx = image width     ($x = 0; $x < imagesx($src); $x++) {         // imagesy = image height         ($y = 0; $y < imagesy($src); $y++) {             $mask_pix = imagecolorat($mask,$x,$y);             //return r,g,b,alpha             $mask_pix_color = imagecolorsforindex($mask, $mask_pix);             if ($mask_pix_color['alpha'] < 127) {                 $src_pix = imagecolorat($src,$x,$y);                 $src_pix_array = imagecolorsforindex($src, $src_pix);                 imagesetpixel($src, $x, $y, imagecolorallocatealpha($src, $src_pix_array['red'], $src_pix_array['green'], $src_pix_array['blue'], 127 - $mask_pix_color['alpha']));             }         }     }  }  $src = imagecreatefrompng('source.png'); $mask = imagecreatefrompng('mask.png');  image_mask($src, $mask);  imagepng($src);  imagedestroy($src); imagedestroy($mask);    ?>

Comments

Post a Comment

Popular posts from this blog

javascript - Google App Script ContentService downloadAsFile not working -

i have web app developed using google app script htmlservice , html form, populating excel sheet in google drive using spreadsheetapp . , 1 section calling contentservice download data excel file. function doget(e) { // read excel sheet //getappfile(); // render application html template return htmlservice.createtemplatefromfile('index').evaluate() .settitle('go smart') .setsandboxmode(htmlservice.sandboxmode.iframe); } function downloaddoublequatecsvfile() { var sheetid = propertiesservice.getscriptproperties().getproperty('sheetid'); var ss = spreadsheetapp.openbyid(sheetid).getactivesheet(); //var ss = spreadsheetapp.getactivespreadsheet().getactivesheet(); var maxcolumn = ss.getlastcolumn(); var maxrow = ss.getlastrow(); var data = ss.getrange(1, 1, maxrow, maxcolumn).getvalues(); if (data.length > 1) { var csv = ""; (var row = 0; row < data.length; row++) { (var c...
Read more

javascript - Function overwritting -

is there way overwrite function or event handling in function? using addeventlistener, can have many event handlers on element want var test=document.getelementbyid("div"); test.addeventlistener("click",function(){alert("im first");},false); test.addeventlistener("click",function(){alert("im second");},false); // alerts "im first" , after "im second" but if want overwrite function/event example based on client width example this function one() { alert("first"); } function two() { alert("second"); } window.onresize = function() { var test = document.getelementbyid("div"); if (window.innerwidth > 500) { test.onclick = 1 } else { test.onclick = two; } } is possible in javascript? in case use effective little known approach. addeventlistener can accept object property handleevent event handler. in case it's easy overwr...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more