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php對(duì)圖像的各種處理函數(shù)代碼總結(jié)

時(shí)間:2024-07-03 23:11:37 PHP 我要投稿
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php對(duì)圖像的各種處理函數(shù)代碼總結(jié)

  一、創(chuàng)建圖片資源

  imagecreatetruecolor(width,height);

php對(duì)圖像的各種處理函數(shù)代碼總結(jié)

  imagecreatefromgif(圖片名稱);

  imagecreatefrompng(圖片名稱);

  imagecreatefromjpeg(圖片名稱);畫出各種圖像 imagegif(圖片資源,保存路徑);

  imagepng()

  imagejpeg();

  二、獲取圖片屬性

  imagesx(res//寬度

  imagesy(res//高度

  getimagesize(文件路徑)

  返回一個(gè)具有四個(gè)單元的數(shù)組。索引 0 包含圖像寬度的像素值,索引 1 包含圖像高度的像素值。索引 2 是圖像類型的.標(biāo)記:1 = GIF,2 = JPG,3 = PNG,4 = SWF,5 = PSD,6 = BMP,7 = TIFF(intel byte order),8 = TIFF(motorola byte order),9 = JPC,10 = JP2,11 = JPX,12 = JB2,13 = SWC,14 = IFF,15 = WBMP,16 = XBM。這些標(biāo)記與 PHP 4.3.0 新加的 IMAGETYPE 常量對(duì)應(yīng)。索引 3 是文本字符串,內(nèi)容為“height="yyy" width="xxx"”,可直接用于 IMG 標(biāo)記。

  銷毀圖像資源

  imagedestroy(圖片資源);

  三、透明處理

  PNG、jpeg透明色都正常,只有g(shù)if不正常

  imagecolortransparent(resource image [,int color])//將某個(gè)顏色設(shè)置成透明色

  imagecolorstotal()

  imagecolorforindex();

  四、圖片的裁剪

  imagecopyresized()

  imagecopyresampled();

  五、加水。ㄎ淖、圖片)

  字符串編碼轉(zhuǎn)換string iconv ( string $in_charset , string $out_charset , string $str )

  六、圖片旋轉(zhuǎn)

  imagerotate();//制定角度的圖片翻轉(zhuǎn)

  七、圖片的翻轉(zhuǎn)

  沿X軸 沿Y軸翻轉(zhuǎn)

  八、銳化

  imagecolorsforindex()

  imagecolorat()

  在圖片上畫圖形 $img=imagecreatefromgif("./images/map.gif");

  復(fù)制代碼 代碼如下:

  $red= imagecolorallocate($img, 255, 0, 0);

  imageline($img, 0, 0, 100, 100, $red);

  imageellipse($img, 200, 100, 100, 100, $red);

  imagegif($img, "./images/map2.gif");

  imagedestroy($img);

  圖片普通縮放

  復(fù)制代碼 代碼如下:

  $filename="./images/hee.jpg";

  $per=0.3;

  list($width, $height)=getimagesize($filename);

  $n_w=$width*$per;

  $n_h=$width*$per;

  $new=imagecreatetruecolor($n_w, $n_h);

  $img=imagecreatefromjpeg($filename);

  //拷貝部分圖像并調(diào)整

  imagecopyresized($new, $img,0, 0,0, 0,$n_w, $n_h, $width, $height);

  //圖像輸出新圖片、另存為

  imagejpeg($new, "./images/hee2.jpg");

  imagedestroy($new);

  imagedestroy($img);

  圖片等比例縮放、沒處理透明色

  復(fù)制代碼 代碼如下:

  function thumn($background, $width, $height, $newfile) {

  list($s_w, $s_h)=getimagesize($background);//獲取原圖片高度、寬度

  if ($width && ($s_w < $s_h)) {

  $width = ($height / $s_h) * $s_w;

  } else {

  $height = ($width / $s_w) * $s_h;

  }

  $new=imagecreatetruecolor($width, $height);

  $img=imagecreatefromjpeg($background);

  imagecopyresampled($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);

  imagejpeg($new, $newfile);

  imagedestroy($new);

  imagedestroy($img);

  }

  thumn("images/hee.jpg", 200, 200, "./images/hee3.jpg");

  gif透明色處理

  復(fù)制代碼 代碼如下:

  function thumn($background, $width, $height, $newfile) {

  list($s_w, $s_h)=getimagesize($background);

  if ($width && ($s_w < $s_h)) {

  $width = ($height / $s_h) * $s_w;

  } else {

  $height = ($width / $s_w) * $s_h;

  }

  $new=imagecreatetruecolor($width, $height);

  $img=imagecreatefromgif($background);

  $otsc=imagecolortransparent($img);

  if($otsc >=0 && $otst < imagecolorstotal($img)){//判斷索引色

  $tran=imagecolorsforindex($img, $otsc);//索引顏色值

  $newt=imagecolorallocate($new, $tran["red"], $tran["green"], $tran["blue"]);

  imagefill($new, 0, 0, $newt);

  imagecolortransparent($new, $newt);

  }

  imagecopyresized($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);

  imagegif($new, $newfile);

  imagedestroy($new);

  imagedestroy($img);

  }

  thumn("images/map.gif", 200, 200, "./images/map3.gif");

  圖片裁剪

  復(fù)制代碼 代碼如下:

  function cut($background, $cut_x, $cut_y, $cut_width, $cut_height, $location){

  $back=imagecreatefromjpeg($background);

  $new=imagecreatetruecolor($cut_width, $cut_height);

  imagecopyresampled($new, $back, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height,$cut_width,$cut_height);

  imagejpeg($new, $location);

  imagedestroy($new);

  imagedestroy($back);

  }

  cut("./images/hee.jpg", 440, 140, 117, 112, "./images/hee5.jpg");

  圖片加水印

  文字水印

  復(fù)制代碼 代碼如下:

  function mark_text($background, $text, $x, $y){

  $back=imagecreatefromjpeg($background);

  $color=imagecolorallocate($back, 0, 255, 0);

  imagettftext($back, 20, 0, $x, $y, $color, "simkai.ttf", $text);

  imagejpeg($back, "./images/hee7.jpg");

  imagedestroy($back);

  }

  mark_text("./images/hee.jpg", "細(xì)說PHP", 150, 250);

  //圖片水印

  function mark_pic($background, $waterpic, $x, $y){

  $back=imagecreatefromjpeg($background);

  $water=imagecreatefromgif($waterpic);

  $w_w=imagesx($water);

  $w_h=imagesy($water);

  imagecopy($back, $water, $x, $y, 0, 0, $w_w, $w_h);

  imagejpeg($back,"./images/hee8.jpg");

  imagedestroy($back);

  imagedestroy($water);

  }

  mark_pic("./images/hee.jpg", "./images/gaolf.gif", 50, 200);

  圖片旋轉(zhuǎn)

  復(fù)制代碼 代碼如下:

  $back=imagecreatefromjpeg("./images/hee.jpg");

  $new=imagerotate($back, 45, 0);

  imagejpeg($new, "./images/hee9.jpg");

  圖片水平翻轉(zhuǎn)垂直翻轉(zhuǎn)

  復(fù)制代碼 代碼如下:

  function turn_y($background, $newfile){

  $back=imagecreatefromjpeg($background);

  $width=imagesx($back);

  $height=imagesy($back);

  $new=imagecreatetruecolor($width, $height);

  for($x=0; $x < $width; $x++){

  imagecopy($new, $back, $width-$x-1, 0, $x, 0, 1, $height);

  }

  imagejpeg($new, $newfile);

  imagedestroy($back);

  imagedestroy($new);

  }

  function turn_x($background, $newfile){

  $back=imagecreatefromjpeg($background);

  $width=imagesx($back);

  $height=imagesy($back);

  $new=imagecreatetruecolor($width, $height);

  for($y=0; $y < $height; $y++){

  imagecopy($new, $back,0, $height-$y-1, 0, $y, $width, 1);

  }

  imagejpeg($new, $newfile);

  imagedestroy($back);

  imagedestroy($new);

  }

  turn_y("./images/hee.jpg", "./images/hee11.jpg");

  turn_x("./images/hee.jpg", "./images/hee12.jpg");

  圖片銳化

  復(fù)制代碼 代碼如下:

  function sharp($background, $degree, $save){

  $back=imagecreatefromjpeg($background);

  $b_x=imagesx($back);

  $b_y=imagesy($back);

  $dst=imagecreatefromjpeg($background);

  for($i=0; $i<$b_x; $i++){

  for($j=0; $j<$b_y; $j++){

  $b_clr1=imagecolorsforindex($back, imagecolorat($back, $i-1, $j-1));前一個(gè)像素顏色數(shù)組

  $b_clr2=imagecolorsforindex($back, imagecolorat($back, $i, $j));取出當(dāng)前顏色數(shù)組

  $r=intval($b_clr2["red"]+$degree*($b_clr2["red"]-$b_clr1["red"]));加深

  $g=intval($b_clr2["green"]+$degree*($b_clr2["green"]-$b_clr1["green"]));

  $b=intval($b_clr2["blue"]+$degree*($b_clr2["blue"]-$b_clr1["blue"]));

  $r=min(255, max($r, 0));//限制r范圍在0-255之間

  $g=min(255, max($g, 0));

  $b=min(255, max($b, 0));

  if(($d_clr=imagecolorexact($dst, $r, $g, $b))==-1){//等于1不在顏色范圍內(nèi)

  $d_clr=Imagecolorallocate($dst, $r, $g, $b);//創(chuàng)建一個(gè)顏色

  }

  imagesetpixel($dst, $i, $j, $d_clr);

  }

  }

  imagejpeg($dst, $save);

  imagedestroy($back);

  imagedestroy($dst);

  }

  sharp("./images/hee.jpg", 20, "./images/hee13.jpg");

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