PHP phpthumb_functions::gd_is_bundled方法代码示例

 function ImageCreateFromStringReplacement(&$RawImageData, $DieOnErrors = false)
 {
     // there are serious bugs in the non-bundled versions of GD which may cause
     // PHP to segfault when calling ImageCreateFromString() - avoid if at all possible
     // when not using a bundled version of GD2
     if (!phpthumb_functions::gd_version()) {
         if ($DieOnErrors) {
             if (!headers_sent()) {
                 // base64-encoded error image in GIF format
                 $ERROR_NOGD = 'R0lGODlhIAAgALMAAAAAABQUFCQkJDY2NkZGRldXV2ZmZnJycoaGhpSUlKWlpbe3t8XFxdXV1eTk5P7+/iwAAAAAIAAgAAAE/vDJSau9WILtTAACUinDNijZtAHfCojS4W5H+qxD8xibIDE9h0OwWaRWDIljJSkUJYsN4bihMB8th3IToAKs1VtYM75cyV8sZ8vygtOE5yMKmGbO4jRdICQCjHdlZzwzNW4qZSQmKDaNjhUMBX4BBAlmMywFSRWEmAI6b5gAlhNxokGhooAIK5o/pi9vEw4Lfj4OLTAUpj6IabMtCwlSFw0DCKBoFqwAB04AjI54PyZ+yY3TD0ss2YcVmN/gvpcu4TOyFivWqYJlbAHPpOntvxNAACcmGHjZzAZqzSzcq5fNjxFmAFw9iFRunD1epU6tsIPmFCAJnWYE0FURk7wJDA0MTKpEzoWAAskiAAA7';
                 header('Content-Type: image/gif');
                 echo base64_decode($ERROR_NOGD);
             } else {
                 echo '*** ERROR: No PHP-GD support available ***';
             }
             exit;
         } else {
             $this->DebugMessage('ImageCreateFromStringReplacement() failed: gd_version says "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__);
             return false;
         }
     }
     if (phpthumb_functions::gd_is_bundled()) {
         $this->DebugMessage('ImageCreateFromStringReplacement() calling built-in ImageCreateFromString()', __FILE__, __LINE__);
         return @ImageCreateFromString($RawImageData);
     }
     if ($this->issafemode) {
         $this->DebugMessage('ImageCreateFromStringReplacement() failed: cannot create temp file in SAFE_MODE', __FILE__, __LINE__);
         return false;
     }
     switch (substr($RawImageData, 0, 3)) {
         case 'GIF':
             $ICFSreplacementFunctionName = 'ImageCreateFromGIF';
             break;
         case "ÿØÿ":
             $ICFSreplacementFunctionName = 'ImageCreateFromJPEG';
             break;
         case "‰" . 'PN':
             $ICFSreplacementFunctionName = 'ImageCreateFromPNG';
             break;
         default:
             $this->DebugMessage('ImageCreateFromStringReplacement() failed: unknown fileformat signature "' . phpthumb_functions::HexCharDisplay(substr($RawImageData, 0, 3)) . '"', __FILE__, __LINE__);
             return false;
             break;
     }
     if ($tempnam = $this->phpThumb_tempnam()) {
         if ($fp_tempnam = @fopen($tempnam, 'wb')) {
             fwrite($fp_tempnam, $RawImageData);
             fclose($fp_tempnam);
             if ($ICFSreplacementFunctionName == 'ImageCreateFromGIF' && !function_exists($ICFSreplacementFunctionName)) {
                 // Need to create from GIF file, but ImageCreateFromGIF does not exist
                 ob_start();
                 if (!@(include_once dirname(__FILE__) . '/phpthumb.gif.php')) {
                     $ErrorMessage = 'Failed to include required file "' . dirname(__FILE__) . '/phpthumb.gif.php" in ' . __FILE__ . ' on line ' . __LINE__;
                     $this->DebugMessage($ErrorMessage, __FILE__, __LINE__);
                 }
                 ob_end_clean();
                 // gif_loadFileToGDimageResource() cannot read from raw data, write to file first
                 if ($tempfilename = $this->phpThumb_tempnam()) {
                     if ($fp_tempfile = @fopen($tempfilename, 'wb')) {
                         fwrite($fp_tempfile, $RawImageData);
                         fclose($fp_tempfile);
                         $gdimg_source = gif_loadFileToGDimageResource($tempfilename);
                         $this->DebugMessage('gif_loadFileToGDimageResource(' . $tempfilename . ') completed', __FILE__, __LINE__);
                         $this->DebugMessage('deleting "' . $tempfilename . '"', __FILE__, __LINE__);
                         unlink($tempfilename);
                         return $gdimg_source;
                         //							break;
                     } else {
                         $ErrorMessage = 'Failed to open tempfile in ' . __FILE__ . ' on line ' . __LINE__;
                         $this->DebugMessage($ErrorMessage, __FILE__, __LINE__);
                     }
                 } else {
                     $ErrorMessage = 'Failed to open generate tempfile name in ' . __FILE__ . ' on line ' . __LINE__;
                     $this->DebugMessage($ErrorMessage, __FILE__, __LINE__);
                 }
             } elseif (function_exists($ICFSreplacementFunctionName) && ($gdimg_source = @$ICFSreplacementFunctionName($tempnam))) {
                 // great
                 $this->DebugMessage($ICFSreplacementFunctionName . '(' . $tempnam . ') succeeded', __FILE__, __LINE__);
                 $this->DebugMessage('deleting "' . $tempnam . '"', __FILE__, __LINE__);
                 unlink($tempnam);
                 return $gdimg_source;
             } else {
                 // GD functions not available, or failed to create image
                 $this->DebugMessage($ICFSreplacementFunctionName . '(' . $tempnam . ') ' . (function_exists($ICFSreplacementFunctionName) ? 'failed' : 'does not exist'), __FILE__, __LINE__);
                 if (isset($_GET['phpThumbDebug'])) {
                     $this->phpThumbDebug();
                 }
             }
         } else {
             $ErrorMessage = 'Failed to fopen(' . $tempnam . ', "wb") in ' . __FILE__ . ' on line ' . __LINE__ . "\n" . 'You may need to set $PHPTHUMB_CONFIG[temp_directory] in phpThumb.config.php';
             if ($this->issafemode) {
                 $ErrorMessage = 'ImageCreateFromStringReplacement() failed in ' . __FILE__ . ' on line ' . __LINE__ . ': cannot create temp file in SAFE_MODE';
             }
             $this->DebugMessage($ErrorMessage, __FILE__, __LINE__);
         }
         $this->DebugMessage('deleting "' . $tempnam . '"', __FILE__, __LINE__);
         @unlink($tempnam);
     } else {
         $ErrorMessage = 'Failed to generate phpThumb_tempnam() in ' . __FILE__ . ' on line ' . __LINE__ . "\n" . 'You may need to set $PHPTHUMB_CONFIG[temp_directory] in phpThumb.config.php';
         if ($this->issafemode) {
//.........这里部分代码省略.........

 public function Smooth(&$gdimg, $amount = 6)
 {
     $amount = min(25, max(0, $amount));
     if ($amount == 0) {
         return true;
     }
     if (phpthumb_functions::version_compare_replacement(phpversion(), '5.0.0', '>=') && phpthumb_functions::gd_is_bundled()) {
         if (ImageFilter($gdimg, IMG_FILTER_SMOOTH, $amount)) {
             return true;
         }
         $this->DebugMessage('FAILED: ImageFilter($gdimg, IMG_FILTER_SMOOTH, ' . $amount . ')', __FILE__, __LINE__);
         // fall through and try it the hard way
     }
     // currently not implemented "the hard way"
     $this->DebugMessage('FAILED: phpthumb_filters::Smooth($gdimg, ' . $amount . ') [function not implemented]', __FILE__, __LINE__);
     return false;
 }

 function applyUnsharpMask(&$img, $amount, $radius, $threshold)
 {
     // $img is an image that is already created within php using
     // imgcreatetruecolor. No url! $img must be a truecolor image.
     // Attempt to calibrate the parameters to Photoshop:
     $amount = min($amount, 500);
     $amount = $amount * 0.016;
     if ($amount == 0) {
         return true;
     }
     $radius = min($radius, 50);
     $radius = $radius * 2;
     $threshold = min($threshold, 255);
     $radius = abs(round($radius));
     // Only integers make sense.
     if ($radius == 0) {
         return true;
     }
     $w = ImageSX($img);
     $h = ImageSY($img);
     $imgCanvas = ImageCreateTrueColor($w, $h);
     $imgCanvas2 = ImageCreateTrueColor($w, $h);
     ImageCopy($imgCanvas, $img, 0, 0, 0, 0, $w, $h);
     ImageCopy($imgCanvas2, $img, 0, 0, 0, 0, $w, $h);
     $builtinFilterSucceeded = false;
     if ($radius == 1) {
         if (phpthumb_functions::version_compare_replacement(phpversion(), '5.0.0', '>=') && phpthumb_functions::gd_is_bundled()) {
             if (ImageFilter($imgCanvas, IMG_FILTER_GAUSSIAN_BLUR) && ImageFilter($imgCanvas2, IMG_FILTER_GAUSSIAN_BLUR)) {
                 $builtinFilterSucceeded = true;
             }
         }
     }
     if (!$builtinFilterSucceeded) {
         $imgBlur = ImageCreateTrueColor($w, $h);
         $imgBlur2 = ImageCreateTrueColor($w, $h);
         ///////////////////////////
         //
         // Gaussian blur matrix:
         //	1  2  1
         //	2  4  2
         //	1  2  1
         //
         ///////////////////////////
         // Move copies of the image around one pixel at the time and merge them with weight
         // according to the matrix. The same matrix is simply repeated for higher radii.
         for ($i = 0; $i < $radius; $i++) {
             ImageCopy($imgBlur, $imgCanvas, 0, 0, 1, 1, $w - 1, $h - 1);
             // up left
             ImageCopyMerge($imgBlur, $imgCanvas, 1, 1, 0, 0, $w, $h, 50);
             // down right
             ImageCopyMerge($imgBlur, $imgCanvas, 0, 1, 1, 0, $w - 1, $h, 33.33333);
             // down left
             ImageCopyMerge($imgBlur, $imgCanvas, 1, 0, 0, 1, $w, $h - 1, 25);
             // up right
             ImageCopyMerge($imgBlur, $imgCanvas, 0, 0, 1, 0, $w - 1, $h, 33.33333);
             // left
             ImageCopyMerge($imgBlur, $imgCanvas, 1, 0, 0, 0, $w, $h, 25);
             // right
             ImageCopyMerge($imgBlur, $imgCanvas, 0, 0, 0, 1, $w, $h - 1, 20);
             // up
             ImageCopyMerge($imgBlur, $imgCanvas, 0, 1, 0, 0, $w, $h, 16.666667);
             // down
             ImageCopyMerge($imgBlur, $imgCanvas, 0, 0, 0, 0, $w, $h, 50);
             // center
             ImageCopy($imgCanvas, $imgBlur, 0, 0, 0, 0, $w, $h);
             // During the loop above the blurred copy darkens, possibly due to a roundoff
             // error. Therefore the sharp picture has to go through the same loop to
             // produce a similar image for comparison. This is not a good thing, as processing
             // time increases heavily.
             ImageCopy($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 50);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 33.33333);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 25);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 33.33333);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 25);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 20);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 16.666667);
             ImageCopyMerge($imgBlur2, $imgCanvas2, 0, 0, 0, 0, $w, $h, 50);
             ImageCopy($imgCanvas2, $imgBlur2, 0, 0, 0, 0, $w, $h);
         }
         ImageDestroy($imgBlur);
         ImageDestroy($imgBlur2);
     }
     // Calculate the difference between the blurred pixels and the original
     // and set the pixels
     for ($x = 0; $x < $w; $x++) {
         // each row
         for ($y = 0; $y < $h; $y++) {
             // each pixel
             $rgbOrig = ImageColorAt($imgCanvas2, $x, $y);
             $rOrig = $rgbOrig >> 16 & 0xff;
             $gOrig = $rgbOrig >> 8 & 0xff;
             $bOrig = $rgbOrig & 0xff;
             $rgbBlur = ImageColorAt($imgCanvas, $x, $y);
             $rBlur = $rgbBlur >> 16 & 0xff;
             $gBlur = $rgbBlur >> 8 & 0xff;
             $bBlur = $rgbBlur & 0xff;
             // When the masked pixels differ less from the original
             // than the threshold specifies, they are set to their original value.
             $rNew = abs($rOrig - $rBlur) >= $threshold ? max(0, min(255, $amount * ($rOrig - $rBlur) + $rOrig)) : $rOrig;
//.........这里部分代码省略.........