public function __construct($map, $options = null, $isMergeImage = null, $isReplaceUri = null)
{
parent::__construct($map);
$this->isMergeImage = is_null($isMergeImage) ? C('IS_MERGE_IMAGE') : $isMergeImage;
$this->isReplaceUri = is_null($isReplaceUri) ? C('IS_REPLACE_URI') : $isReplaceUri;
if (!self::$cacheDir) {
self::$cacheDir = C('CSS_CACHE_PATH') . '/' . str_random();
}
// 如果需要合图，则导入合图配置
if ($this->isMergeImage) {
if (!file_exists(C('IMERGE_PATH'))) {
mark('您已打开合图功能，但没有生成合图配置，请先进行合图，或者关闭合图功能', 'error');
$this->isMergeImage = false;
} else {
$loader = new MergeConfigLoader(C('IMERGE_PATH'));
$this->spriteConfig = $loader->getSpriteConfig();
}
}
}
/**
* 绘制图像
* @param $type
*/
public function draw($type, $config = array())
{
if (empty($config)) {
$loader = new MergeConfigLoader($this->imergePath);
$config = $loader->getImageConfigByType($type);
}
$imgList = array();
if (!empty($config)) {
foreach ($config as $key => $value) {
try {
$imgList[$key] = new Image($this->staticRelativePath . $key, $value);
} catch (ImageException $e) {
mark("合图{$type}中，存在小图{$key}的配置文件，但该小图不存在，请到合图配置界面删除该小图", 'warn');
}
}
}
$layout = new Layout($imgList);
$spriteConfigs = array();
$spriteConfigs[$type] = array();
if ($layout->reflow($width, $height)) {
$this->sprite = imagecreatetruecolor($width, $height);
imagealphablending($this->sprite, false);
imagesavealpha($this->sprite, true);
imagefill($this->sprite, 0, 0, imagecolorallocatealpha($this->sprite, 0, 0, 0, 127));
$spriteConfigs[$type]['config'] = $this->repaint($this->sprite, $imgList, $width, $height);
// 记录sprite的属性
$spriteConfigs[$type]['attr'] = array('filename' => $type . C('SPRITE_SUFFIX') . '.png', 'width' => $width, 'height' => $height);
// $spriteConfigs[$type]['filename'] = $type.C('SPRITE_SUFFIX').'.png';
// 生成大图到imerge_sprite_dir
$path = $this->imergePath . '/' . C('IMERGE_SPRITE_DIR') . '/' . $type . C('SPRITE_SUFFIX') . '.png';
imagepng($this->sprite, $path);
// 写入配置
$writer = new MergeConfigWriter($this->imergePath);
$writer->writeSpriteConfig($spriteConfigs);
// 派发处理完成事件
trigger('DRAW_SPRITE_END', $path);
}
}
