CodeIgniter圖像處理類的深入解析_PHP教程
Jul 21, 2016 pm 03:05 PM
image.php
class Image extends Controller {
??? function Image()
??? {
??? parent::Controller();??
??? $this->load->library('image_lib');??
??? }
??? //縮略圖
??? function index(){
??????? echo '* 調(diào)整圖像大小
??????????? * 創(chuàng)建縮略圖
??????????? * 圖像裁剪
??????????? * 圖像旋轉(zhuǎn)
??????????? * 添加圖像水印
??????? ';
??? }
??? //縮略圖
??? function resize(){
??? /*
??? 注意
??? 當(dāng)$config['create_thumb']等于FALSE并且$config['new_image']沒有指定時,會調(diào)整原圖的大小
??? 當(dāng)$config['create_thumb']等于TRUE并且$config['new_image']沒有指定時,生成文件名為(原圖名 _thumb.擴(kuò)展名)
??? 當(dāng)$config['create_thumb']等于FALSE并且$config['new_image']指定時,生成文件名為$config['new_image']的值
??? 當(dāng)$config['create_thumb']等于TRUE并且$config['new_image']指定時,生成文件名為(原圖名 _thumb.擴(kuò)展名)
??? */
??????? $config['image_library'] = 'gd2';//(必須)設(shè)置圖像庫
??????? $config['source_image'] = 'ptjsite/upload/55002.jpg';//(必須)設(shè)置原始圖像的名字/路徑
??????? $config['dynamic_output'] = FALSE;//決定新圖像的生成是要寫入硬盤還是動態(tài)的存在
??????? $config['quality'] = '90%';//設(shè)置圖像的品質(zhì)。品質(zhì)越高,圖像文件越大
??????? $config['new_image'] = 'ptjsite/upload/resize004.gif';//設(shè)置圖像的目標(biāo)名/路徑。
??????? $config['width'] = 575;//(必須)設(shè)置你想要得圖像寬度。
??????? $config['height'] = 350;//(必須)設(shè)置你想要得圖像高度
??????? $config['create_thumb'] = TRUE;//讓圖像處理函數(shù)產(chǎn)生一個預(yù)覽圖像(將_thumb插入文件擴(kuò)展名之前)
??????? $config['thumb_marker'] = '_thumb';//指定預(yù)覽圖像的標(biāo)示。它將在被插入文件擴(kuò)展名之前。例如,mypic.jpg 將會變成 mypic_thumb.jpg
??????? $config['maintain_ratio'] = TRUE;//維持比例
??????? $config['master_dim'] = 'auto';//auto, width, height 指定主軸線
??????? $this->image_lib->initialize($config);
??????? if (!$this->image_lib->resize())
??????? {
??????????? echo $this->image_lib->display_errors();
??????? }else{
??????????? echo "成功的";
??????? }
??? }
??? //圖像裁剪
??? function crop(){??
??????? $config['image_library'] = 'gd2';//設(shè)置圖像庫
??????? $config['source_image'] = 'ptjsite/upload/004.gif';//(必須)設(shè)置原始圖像的名字/路徑
??????? $config['dynamic_output'] = FALSE;//決定新圖像的生成是要寫入硬盤還是動態(tài)的存在
??????? $config['quality'] = '90%';//設(shè)置圖像的品質(zhì)。品質(zhì)越高,圖像文件越大
??????? $config['new_image'] = 'ptjsite/upload/crop004.gif';//(必須)設(shè)置圖像的目標(biāo)名/路徑。
??????? $config['width'] = 75;//(必須)設(shè)置你想要得圖像寬度。
??????? $config['height'] = 50;//(必須)設(shè)置你想要得圖像高度
??????? $config['maintain_ratio'] = TRUE;//維持比例
??????? $config['x_axis'] = '30';//(必須)從左邊取的像素值
??????? $config['y_axis'] = '40';//(必須)從頭部取的像素值
??????? $this->image_lib->initialize($config);
??????? if (!$this->image_lib->crop())
??????? {
??????????? echo $this->image_lib->display_errors();
??????? }else{
??????????? echo "成功的";
??????? }
??? }
??
??? //圖像旋轉(zhuǎn)
??? function rotate(){??
??????? $config['image_library'] = 'gd2';//(必須)設(shè)置圖像庫
??????? $config['source_image'] = 'ptjsite/upload/001.jpg';//(必須)設(shè)置原始圖像的名字/路徑
??????? $config['dynamic_output'] = FALSE;//決定新圖像的生成是要寫入硬盤還是動態(tài)的存在
??????? $config['quality'] = '90%';//設(shè)置圖像的品質(zhì)。品質(zhì)越高,圖像文件越大
??????? $config['new_image'] = 'ptjsite/upload/rotate001.jpg';//設(shè)置圖像的目標(biāo)名/路徑
??????? $config['rotation_angle'] = 'vrt';//有5個旋轉(zhuǎn)選項 逆時針90 180 270 度 vrt 豎向翻轉(zhuǎn) hor 橫向翻轉(zhuǎn)??
??????? $this->image_lib->initialize($config);
??????? if ( ! $this->image_lib->rotate())
??????? {
??????????? echo $this->image_lib->display_errors();
??????? }
??? }
??? //文字水印
??? function watermark(){
??????? $config['image_library'] = 'gd2';//(必須)設(shè)置圖像庫
??????? $config['source_image'] = 'ptjsite/upload/003.jpg';//(必須)設(shè)置原圖像的名字和路徑. 路徑必須是相對或絕對路徑,但不能是URL.
??????? $config['dynamic_output'] = FALSE;//TRUE 動態(tài)的存在(直接向瀏覽器中以輸出圖像),FALSE 寫入硬盤
??????? $config['quality'] = '90%';//設(shè)置圖像的品質(zhì)。品質(zhì)越高,圖像文件越大
??????? $config['new_image'] = 'ptjsite/upload/crop004.gif';//設(shè)置圖像的目標(biāo)名/路徑。
??????? $config['wm_type'] = 'overlay';//(必須)設(shè)置想要使用的水印處理類型(text, overlay)
??????? $config['wm_padding'] = '5';//圖像相對位置(單位像素)
??????? $config['wm_vrt_alignment'] = 'middle';//豎軸位置 top, middle, bottom
??????? $config['wm_hor_alignment'] = 'center';//橫軸位置 left, center, right
??????? $config['wm_vrt_offset'] = '0';//指定一個垂直偏移量(以像素為單位)
??????? $config['wm_hor_offset'] = '0';//指定一個橫向偏移量(以像素為單位)
??????? /* 文字水印參數(shù)設(shè)置 */
??????? $config['wm_text'] = 'Copyright 2008 - John Doe';//(必須)水印的文字內(nèi)容
??????? $config['wm_font_path'] = 'ptj_system/fonts/type-ra.ttf';//字體名字和路徑
??????? $config['wm_font_size'] = '16';//(必須)文字大小
??????? $config['wm_font_color'] = 'FF0000';//(必須)文字顏色,十六進(jìn)制數(shù)
??????? $config['wm_shadow_color'] = 'FF0000';//投影顏色,十六進(jìn)制數(shù)
??????? $config['wm_shadow_distance'] = '3';//字體和投影距離(單位像素)。
??????? /* 圖像水印參數(shù)設(shè)置 */
??????? /*
??????? $config['wm_overlay_path'] = 'ptjsite/upload/overlay.png';//水印圖像的名字和路徑
??????? $config['wm_opacity'] = '50';//水印圖像的透明度
??????? $config['wm_x_transp'] = '4';//水印圖像通道
??????? $config['wm_y_transp'] = '4';//水印圖像通道
??????? */
??????? $this->image_lib->initialize($config);
??????? $this->image_lib->watermark();
??? }
??? //圖像水印
??? function watermark2(){
??????? $config['image_library'] = 'gd2';//(必須)設(shè)置圖像庫
??????? $config['source_image'] = 'ptjsite/upload/003.jpg';//(必須)設(shè)置原圖像的名字和路徑. 路徑必須是相對或絕對路徑,但不能是URL.
??????? $config['dynamic_output'] = FALSE;//TRUE 動態(tài)的存在(直接向瀏覽器中以輸出圖像),FALSE 寫入硬盤
??????? $config['quality'] = '90%';//設(shè)置圖像的品質(zhì)。品質(zhì)越高,圖像文件越大
??????? $config['new_image'] = 'ptjsite/upload/crop004.gif';//設(shè)置圖像的目標(biāo)名/路徑。
??????? $config['wm_type'] = 'overlay';//(必須)設(shè)置想要使用的水印處理類型(text, overlay)
??????? $config['wm_padding'] = '5';//圖像相對位置(單位像素)
??????? $config['wm_vrt_alignment'] = 'middle';//豎軸位置 top, middle, bottom
??????? $config['wm_hor_alignment'] = 'center';//橫軸位置 left, center, right
??????? $config['wm_vrt_offset'] = '0';//指定一個垂直偏移量(以像素為單位)
??????? $config['wm_hor_offset'] = '0';//指定一個橫向偏移量(以像素為單位)
??????? /* 文字水印參數(shù)設(shè)置 */
??????? /*
??????? $config['wm_text'] = 'Copyright 2008 - John Doe';//(必須)水印的文字內(nèi)容
??????? $config['wm_font_path'] = 'ptj_system/fonts/type-ra.ttf';//字體名字和路徑
??????? $config['wm_font_size'] = '16';//(必須)文字大小
??????? $config['wm_font_color'] = 'FF0000';//(必須)文字顏色,十六進(jìn)制數(shù)
??????? $config['wm_shadow_color'] = 'FF0000';//投影顏色,十六進(jìn)制數(shù)
??????? $config['wm_shadow_distance'] = '3';//字體和投影距離(單位像素)。
??????? */
??????? /* 圖像水印參數(shù)設(shè)置 */
??????? $config['wm_overlay_path'] = 'ptjsite/upload/overlay.png';//水印圖像的名字和路徑
??????? $config['wm_opacity'] = '50';//水印圖像的透明度
??????? $config['wm_x_transp'] = '4';//水印圖像通道
??????? $config['wm_y_transp'] = '4';//水印圖像通道
??????? $this->image_lib->initialize($config);
??????? $this->image_lib->watermark();
??? }
}
?>

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