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썸네일 생성시 샤픈효과 적용 및 사이즈 체크 코드 수정

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This commit is contained in:
chicpro
2013-04-18 14:55:51 +09:00
parent cdad037403
commit 81a0fedb6c
1 changed files with 270 additions and 54 deletions
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324
lib/thumbnail.lib.php
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@ -158,54 +158,45 @@ function get_view_thumbnail($contents)
return $contents;
}
//function thumbnail($bo_table, $file, $width, $height, $is_create=false)
function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create, $is_crop=false)
function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create, $is_crop=false, $crop_mode='center', $is_sharpen=true, $um_value='80/0.5/3')
{
global $g4;
if ($thumb_width==0 || $thumb_height==0) return;
if(!$thumb_width && !$thumb_height)
return;
$thumb_filename = preg_replace("/\.[^\.]+$/i", "", $filename); // 확장자제거
$thumb_file = "$target_path/thumb-{$thumb_filename}_{$thumb_width}x{$thumb_height}.jpg";
$source_file = "$source_path/$filename";
if(!is_file($source_file)) // 원본 파일이 없다면
return;
$size = @getimagesize($source_file);
if($size[2] < 1 || $size[2] > 3) // gif, jpg, png 에 대해서만 적용
return;
if (!is_dir($target_path)) {
@mkdir($target_path, 0707);
@chmod($target_path, 0707);
}
$thumb_file = "$target_path/thumb-{$thumb_filename}_{$thumb_width}x{$thumb_height}.jpg";
// Animated GIF는 썸네일 생성하지 않음
if($size[2] == 1) {
if(is_animated_gif($source_file))
return;
}
$thumb_time = @filemtime($thumb_file);
$source_file = "$source_path/$filename";
$source_time = @filemtime($source_file);
if (file_exists($thumb_file)) {
if ($is_create == false && $source_time < $thumb_time) {
return basename($thumb_file);
}
}
$size = @getimagesize($source_file);
// 이미지 파일이 없거나 아님
if (!$size[0]) {
if (!$thumb_height) $thumb_height = $thumb_width;
$thumb_file = "$target_path/thumb-noimg_{$thumb_width}x{$thumb_height}.jpg";
if (!file_exists($thumb_file)) {
$target = imagecreate($thumb_width, $thumb_height);
imagecolorallocate($target, 250, 250, 250);
imagecopy($target, $target, 0, 0, 0, 0, $thumb_width, $thumb_height);
imagejpeg($target, $thumb_file, 90);
@chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
}
return basename($thumb_file);
}
// Animated GIF 체크
if($size[2] == 1) {
if(is_animated_gif($source_file))
return basename($source_file);
}
$is_imagecopyresampled = false;
$is_large = false;
// 원본파일의 GD 이미지 생성
$src = null;
if ($size[2] == 1) {
$src = imagecreatefromgif($source_file);
@ -220,46 +211,271 @@ function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_h
if(!$src)
return;
$src_width = $size[0];
$src_height = $size[1];
if($is_crop && $thumb_width && $thumb_height) {
$ratio = $thumb_height / $thumb_width;
if($src_height / $src_width >= $ratio) {
$src_height = ceil(($thumb_height * $src_width) / $thumb_width);
$is_large = true;
// width, height 설정
if($thumb_width) {
if(!$thumb_height) {
$thumb_height = round(($thumb_width * $size[1]) / $size[0]);
} else {
$src_width = ceil(($thumb_width * $src_height) / $thumb_height);
if($size[0] < $thumb_width || $size[1] < $thumb_height)
$is_large = false;
}
} else {
if($thumb_height) {
$thumb_width = round(($thumb_height * $size[0]) / $size[1]);
}
}
if ($thumb_width) {
if ($thumb_height) {
$rate = $thumb_width / $src_width;
$tmp_height = (int)($src_height * $rate);
if ($tmp_height < $thumb_height) {
$dst = imagecreatetruecolor($thumb_width, $thumb_height);
$bgcolor = imagecolorallocate($dst, 250, 250, 250); // 배경색 여기야!!!
imagefill($dst, 0, 0, $bgcolor);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $src_width, $src_height);
} else {
$dst = imagecreatetruecolor($thumb_width, $thumb_height);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $src_width, $src_height);
$dst_x = 0;
$dst_y = 0;
$src_x = 0;
$src_y = 0;
$dst_w = $thumb_width;
$dst_h = $thumb_height;
$src_w = $size[0];
$src_h = $size[1];
$ratio = $dst_h / $dst_w;
if($is_large) {
// 크롭처리
if($is_crop) {
switch($crop_mode)
{
case 'center':
if($size[1] / $size[0] >= $ratio) {
$src_h = round($src_w * $ratio);
$src_y = round(($size[1] - $src_h) / 2);
} else {
$src_w = round($size[1] / $ratio);
$src_x = round(($size[0] - $src_w) / 2);
}
break;
default:
if($size[1] / $size[0] >= $ratio) {
$src_h = round($src_w * $ratio);
} else {
$src_w = round($size[1] / $ratio);
}
break;
}
} else {
$rate = $thumb_width / $src_width;
$tmp_height = (int)($src_height * $rate);
$dst = imagecreatetruecolor($thumb_width, $tmp_height);
imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $tmp_height, $src_width, $src_height);
if($size[1] / $size[0] >= $ratio) {
$src_h = round($src_w * $ratio);
} else {
$src_w = round($size[1] / $ratio);
}
}
$dst = imagecreatetruecolor($dst_w, $dst_h);
} else {
$dst = imagecreatetruecolor($dst_w, $dst_h);
if($src_w < $dst_w) {
if($src_h >= $dst_h) {
$dst_x = round(($dst_w - $src_w) / 2);
$src_h = $dst_h;
} else {
$dst_x = round(($dst_w - $src_w) / 2);
$dst_y = round(($dst_h - $src_h) / 2);
$dst_w = $src_w;
$dst_h = $src_h;
}
} else {
if($src_h < $dst_h) {
$dst_y = round(($dst_h - $src_h) / 2);
$dst_h = $src_h;
$src_w = $dst_w;
}
}
$bgcolor = imagecolorallocate($dst, 255, 255, 255); // 배경색
imagefill($dst, 0, 0, $bgcolor);
}
imagecopyresampled($dst, $src, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
// sharpen 적용
if($is_sharpen && $is_large) {
$val = explode('/', $um_value);
UnsharpMask($dst, $val[0], $val[1], $val[2]);
}
//imagepng($dst, $thumb_file, 9); // 0 (no compression) ~ 9
imagejpeg($dst, $thumb_file, 90);
chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
imagedestroy($dst);
return basename($thumb_file);
}
function UnsharpMask($img, $amount, $radius, $threshold) {
/*
출처 : http://vikjavev.no/computing/ump.php
New:
- In version 2.1 (February 26 2007) Tom Bishop has done some important speed enhancements.
- From version 2 (July 17 2006) the script uses the imageconvolution function in PHP
version >= 5.1, which improves the performance considerably.
Unsharp masking is a traditional darkroom technique that has proven very suitable for
digital imaging. The principle of unsharp masking is to create a blurred copy of the image
and compare it to the underlying original. The difference in colour values
between the two images is greatest for the pixels near sharp edges. When this
difference is subtracted from the original image, the edges will be
accentuated.
The Amount parameter simply says how much of the effect you want. 100 is 'normal'.
Radius is the radius of the blurring circle of the mask. 'Threshold' is the least
difference in colour values that is allowed between the original and the mask. In practice
this means that low-contrast areas of the picture are left unrendered whereas edges
are treated normally. This is good for pictures of e.g. skin or blue skies.
Any suggenstions for improvement of the algorithm, expecially regarding the speed
and the roundoff errors in the Gaussian blur process, are welcome.
*/
////////////////////////////////////////////////////////////////////////////////////////////////
////
//// Unsharp Mask for PHP - version 2.1.1
////
//// Unsharp mask algorithm by Torstein Hønsi 2003-07.
//// thoensi_at_netcom_dot_no.
//// Please leave this notice.
////
///////////////////////////////////////////////////////////////////////////////////////////////
// $img is an image that is already created within php using
// imgcreatetruecolor. No url! $img must be a truecolor image.
// Attempt to calibrate the parameters to Photoshop:
if ($amount > 500) $amount = 500;
$amount = $amount * 0.016;
if ($radius > 50) $radius = 50;
$radius = $radius * 2;
if ($threshold > 255) $threshold = 255;
$radius = abs(round($radius)); // Only integers make sense.
if ($radius == 0) {
return $img; imagedestroy($img); break; }
$w = imagesx($img); $h = imagesy($img);
$imgCanvas = imagecreatetruecolor($w, $h);
$imgBlur = imagecreatetruecolor($w, $h);
// Gaussian blur matrix:
//
// 1 2 1
// 2 4 2
// 1 2 1
//
//////////////////////////////////////////////////
if (function_exists('imageconvolution')) { // PHP >= 5.1
$matrix = array(
array( 1, 2, 1 ),
array( 2, 4, 2 ),
array( 1, 2, 1 )
);
$divisor = array_sum(array_map('array_sum', $matrix));
$offset = 0;
imagecopy ($imgBlur, $img, 0, 0, 0, 0, $w, $h);
imageconvolution($imgBlur, $matrix, $divisor, $offset);
}
else {
// Move copies of the image around one pixel at the time and merge them with weight
// according to the matrix. The same matrix is simply repeated for higher radii.
for ($i = 0; $i < $radius; $i++) {
imagecopy ($imgBlur, $img, 0, 0, 1, 0, $w - 1, $h); // left
imagecopymerge ($imgBlur, $img, 1, 0, 0, 0, $w, $h, 50); // right
imagecopymerge ($imgBlur, $img, 0, 0, 0, 0, $w, $h, 50); // center
imagecopy ($imgCanvas, $imgBlur, 0, 0, 0, 0, $w, $h);
imagecopymerge ($imgBlur, $imgCanvas, 0, 0, 0, 1, $w, $h - 1, 33.33333 ); // up
imagecopymerge ($imgBlur, $imgCanvas, 0, 1, 0, 0, $w, $h, 25); // down
}
}
if($threshold>0){
// Calculate the difference between the blurred pixels and the original
// and set the pixels
for ($x = 0; $x < $w-1; $x++) { // each row
for ($y = 0; $y < $h; $y++) { // each pixel
$rgbOrig = ImageColorAt($img, $x, $y);
$rOrig = (($rgbOrig >> 16) & 0xFF);
$gOrig = (($rgbOrig >> 8) & 0xFF);
$bOrig = ($rgbOrig & 0xFF);
$rgbBlur = ImageColorAt($imgBlur, $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;
$gNew = (abs($gOrig - $gBlur) >= $threshold)
? max(0, min(255, ($amount * ($gOrig - $gBlur)) + $gOrig))
: $gOrig;
$bNew = (abs($bOrig - $bBlur) >= $threshold)
? max(0, min(255, ($amount * ($bOrig - $bBlur)) + $bOrig))
: $bOrig;
if (($rOrig != $rNew) || ($gOrig != $gNew) || ($bOrig != $bNew)) {
$pixCol = ImageColorAllocate($img, $rNew, $gNew, $bNew);
ImageSetPixel($img, $x, $y, $pixCol);
}
}
}
}
else{
for ($x = 0; $x < $w; $x++) { // each row
for ($y = 0; $y < $h; $y++) { // each pixel
$rgbOrig = ImageColorAt($img, $x, $y);
$rOrig = (($rgbOrig >> 16) & 0xFF);
$gOrig = (($rgbOrig >> 8) & 0xFF);
$bOrig = ($rgbOrig & 0xFF);
$rgbBlur = ImageColorAt($imgBlur, $x, $y);
$rBlur = (($rgbBlur >> 16) & 0xFF);
$gBlur = (($rgbBlur >> 8) & 0xFF);
$bBlur = ($rgbBlur & 0xFF);
$rNew = ($amount * ($rOrig - $rBlur)) + $rOrig;
if($rNew>255){$rNew=255;}
elseif($rNew<0){$rNew=0;}
$gNew = ($amount * ($gOrig - $gBlur)) + $gOrig;
if($gNew>255){$gNew=255;}
elseif($gNew<0){$gNew=0;}
$bNew = ($amount * ($bOrig - $bBlur)) + $bOrig;
if($bNew>255){$bNew=255;}
elseif($bNew<0){$bNew=0;}
$rgbNew = ($rNew << 16) + ($gNew <<8) + $bNew;
ImageSetPixel($img, $x, $y, $rgbNew);
}
}
}
imagedestroy($imgCanvas);
imagedestroy($imgBlur);
return true;
}
function is_animated_gif($filename) {
if(!($fh = @fopen($filename, 'rb')))
return false;