[英]Opencart 2.3.0.2 black background image PNG
我在Opencart 2.3.0.2上調整PNG圖片大小時遇到了一些問題。 我認為我的代碼不知道如何使用PNG。 這是CATALOG / MODEL / TOOL / IMAGE.php的修改代碼
<?php
class ModelToolImage extends Model {
public function resize($filename, $width, $height, $type = "f") {
if (!file_exists(DIR_IMAGE . $filename) || !is_file(DIR_IMAGE . $filename)) {
return;
}
$info = pathinfo($filename);
$extension = $info['extension'];
$old_image = $filename;
$new_image = 'cache/' . utf8_substr($filename, 0, utf8_strrpos($filename, '.')) . '-' . $width . 'x' . $height . $type .'.' . $extension;
if (!file_exists(DIR_IMAGE . $new_image) || (filemtime(DIR_IMAGE . $old_image) > filemtime(DIR_IMAGE . $new_image))) {
$path = '';
$directories = explode('/', dirname(str_replace('../', '', $new_image)));
foreach ($directories as $directory) {
$path = $path . '/' . $directory;
if (!file_exists(DIR_IMAGE . $path)) {
@mkdir(DIR_IMAGE . $path, 0777);
}
}
list($width_orig, $height_orig) = getimagesize(DIR_IMAGE . $old_image);
if ($width_orig != $width || $height_orig != $height) {
$scaleW = $width_orig/$width;
$scaleH = $height_orig/$height;
$image = new Image(DIR_IMAGE . $old_image);
if ($scaleH > $scaleW) {
$_height = $height * $scaleW;
$top_x = 0;
$top_y = ($height_orig - $_height) / 2;
$bottom_x = $width_orig;
$bottom_y = $top_y + $_height;
$image->crop($top_x, $top_y, $bottom_x, $bottom_y);
} elseif ($scaleH < $scaleW) {
$_width = $width * $scaleH;
$top_x = ($width_orig - $_width) / 2;
$top_y = 0;
$bottom_x = $top_x + $_width;
$bottom_y = $height_orig;
$image->crop($top_x, $top_y, $bottom_x, $bottom_y);
}
$image->resize($width, $height, $type);
$image->save(DIR_IMAGE . $new_image);
} else {
copy(DIR_IMAGE . $old_image, DIR_IMAGE . $new_image);
}
}
if ($this->request->server['HTTPS']) {
return $this->config->get('config_ssl') . 'image/' . $new_image;
} else {
return $this->config->get('config_url') . 'image/' . $new_image;
}
}
}
當我使用此代碼時,我的png圖像具有黑色背景。 老實說,我不明白是什么問題。 我只是在學習PHP,還不能完全理解問題所在。 這是原始代碼,其中PNG圖像還可以且透明
<?php
class ModelToolImage extends Model {
public function resize($filename, $width, $height) {
if (!is_file(DIR_IMAGE . $filename)) {
if (is_file(DIR_IMAGE . 'no_image.jpg')) {
$filename = 'no_image.jpg';
} elseif (is_file(DIR_IMAGE . 'no_image.png')) {
$filename = 'no_image.png';
} else {
return;
}
}
$extension = pathinfo($filename, PATHINFO_EXTENSION);
$image_old = $filename;
$image_new = 'cache/' . utf8_substr($filename, 0, utf8_strrpos($filename, '.')) . '-' . (int)$width . 'x' . (int)$height . '.' . $extension;
if (!is_file(DIR_IMAGE . $image_new) || (filectime(DIR_IMAGE . $image_old) > filectime(DIR_IMAGE . $image_new))) {
list($width_orig, $height_orig, $image_type) = getimagesize(DIR_IMAGE . $image_old);
if (!in_array($image_type, array(IMAGETYPE_PNG, IMAGETYPE_JPEG, IMAGETYPE_GIF))) {
return DIR_IMAGE . $image_old;
}
$path = '';
$directories = explode('/', dirname($image_new));
foreach ($directories as $directory) {
$path = $path . '/' . $directory;
if (!is_dir(DIR_IMAGE . $path)) {
@mkdir(DIR_IMAGE . $path, 0777);
}
}
if ($width_orig != $width || $height_orig != $height) {
$image = new Image(DIR_IMAGE . $image_old);
$image->resize($width, $height);
$image->save(DIR_IMAGE . $image_new);
} else {
copy(DIR_IMAGE . $image_old, DIR_IMAGE . $image_new);
}
}
$imagepath_parts = explode('/', $image_new);
$new_image = implode('/', array_map('rawurlencode', $imagepath_parts));
if (isset($this->request->server['HTTPS']) && (($this->request->server['HTTPS'] == 'on') || ($this->request->server['HTTPS'] == '1'))) {
return $this->config->get('config_ssl') . 'image/' . $new_image;
} else {
return $this->config->get('config_url') . 'image/' . $new_image;
}
}
}
只需將此代碼從功能“調整大小”復制到system / library / image.php中的“ crop”
if ($this->mime == 'image/png') {
imagealphablending($this->image, false);
imagesavealpha($this->image, true);
$background = imagecolorallocatealpha($this->image, 255, 255, 255, 127);
imagecolortransparent($this->image, $background);
} else {
$background = imagecolorallocate($this->image, 255, 255, 255);
}
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