如何在PHP GD中调整大小和颜色变化png图像

Question

<?php
createImage(50,50, 0,0, 255);
function createImage($width, $height, $nR, $nG, $nB)
{
$image = imagecreatefrompng("source.png");
imagealphablending($image, false);  
imagesavealpha($image, true);       

      //resize the image
      $new_image = imagecreatetruecolor($width, $height);
      imagealphablending($new_image, false); 
      imagesavealpha($new_image, true);
      imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, imagesx($image), imagesx($image));

    //colorize the image
        $nrgb = str_pad(dechex($nR), 2, '0', STR_PAD_LEFT). str_pad(dechex($nG), 2, '0', STR_PAD_LEFT). str_pad(dechex($nB), 2, '0', STR_PAD_LEFT);              

       $newColor = $nrgb;

        $c2 = sscanf($newColor ,"%2x%2x%2x");

        for($i=0;$i<$width;$i++)
        {
            for($j=0;$j<$height;$j++)
            {
             $cIndex = imagecolorat($new_image,$i,$j);

             imagecolorset($new_image,$cIndex,$c2[0],$c2[1],$c2[2]);
            }
        }

        header("Content-Type: image/png");

        imagepng($new_image,"test.png");
}
?>

Answer 1

这里没有专家...经过一个月的研究和努力研究，到目前为止，我找到了上述解决方案的答案...就在几分钟前...我们必须使用imagecreate funciton代替imagecreatetruecolor ... coz trucolor函数生成32位png图像...我们无法使用imagecolorset函数对32位图像进行着色..它多么棘手..大声笑..感谢蜡笔的支持...