/**
* {@inheritdoc}
*/
public function gamma($correction)
{
if (false === imagegammacorrect($this->resource, 1.0, $correction)) {
throw new RuntimeException('Failed to apply gamma correction to the image');
}
return $this;
}
function get_thumbnail($name, $xsize, $ysize)
{
$thumbname = 'thumbs/' . $name . '_thumb_' . $xsize . '_' . $ysize . '.jpg';
$fname = 'phpbb/files/' . $name;
// Ignore the race condition, should only cause unnecessary work to be done at times
if (!file_exists($thumbname)) {
// Try to open it up with GD
$image = @imagecreatefromjpeg($fname);
if (!$image) {
$image = @imagecreatefrompng($fname);
}
if (!$image) {
$image = @imagecreatefromgif($fname);
}
// If we can't do it then this will have to suffice
if (!$image) {
return 'images/screen1.jpg';
}
// imagecopyresampled assumes images are at gamma 1.0, while they probably are at 2.2 (sRGB)
// details and examples: http://www.4p8.com/eric.brasseur/gamma.html
imagegammacorrect($image, 2.2, 1.0);
$imageout = imagecreatetruecolor($xsize, $ysize);
imagecopyresampled($imageout, $image, 0, 0, 0, 0, $xsize, $ysize, imagesx($image), imagesy($image));
imagegammacorrect($imageout, 1.0, 2.2);
imagejpeg($imageout, $thumbname);
}
return $thumbname;
}
/**
* {@inheritdoc}
*/
public function gamma($correction)
{
if (false === imagegammacorrect($this->ressource, 1.0, $correction)) {
throw new RuntimeException('Gamma correction failed');
}
return $this;
}
/**
* Applies gamma correction to a given image
*
* @param \Intervention\Image\Image $image
* @return boolean
*/
public function execute($image)
{
$gamma = $this->argument(0)->type('numeric')->required()->value();
foreach ($image as $frame) {
imagegammacorrect($frame->getCore(), 1, $gamma);
}
return true;
}
/**
* Executes imagegammacorrect()
*
* @param WideImage_Image $image
* @param numeric $input_gamma
* @param numeric $output_gamma
* @return WideImage_TrueColorImage
*/
function execute($image, $input_gamma, $output_gamma)
{
$new = $image->copy();
if (!imagegammacorrect($new->getHandle(), $input_gamma, $output_gamma)) {
throw new WideImage_GDFunctionResultException("imagegammacorrect() returned false");
}
return $new;
}
function post_plot($img)
{
global $tp;
if (isset($tp['gamma'])) {
imagegammacorrect($img, 1.0, $tp['gamma']);
}
if ($tp['savealpha']) {
imagesavealpha($img, True);
}
}
public function apply($resource)
{
@(list(, $input, $output) = func_get_args());
$input = (double) $input;
$output = (double) $output;
if (!imagegammacorrect($resource, $input, $output)) {
throw new Exception("Gamma correction failed");
}
return $resource;
}
/**
* Generate a thumbnail of a given file from the phpbb directory
*
* @return string the path of the file, images/screen1.jpg on failure
*/
function get_thumbnail($name, $xsize, $ysize)
{
$thumbname = 'thumbs/' . $name . '_thumb_' . $xsize . '_' . $ysize . '.jpg';
$fname = 'phpbb/files/' . $name;
// check if we can actually read the file
if (!is_readable($fname)) {
// we can't continue if we can't read the file
return 'images/screen1.jpg';
}
// Ignore the race condition, should only cause unnecessary work to be done at times
if (!file_exists($thumbname)) {
// Try to open it up with GD
$image = @imagecreatefromjpeg($fname);
if (!$image) {
$image = @imagecreatefrompng($fname);
}
if (!$image) {
$image = @imagecreatefromgif($fname);
}
// If we can't do it then this will have to suffice
if (!$image) {
return 'images/screen1.jpg';
}
$srcw = imagesx($image);
$srch = imagesy($image);
$clipx = 0;
$clipy = 0;
$clipw = $srcw;
$cliph = $srch;
if ($xsize < $srcw * 0.5) {
$maxclip = 0.8;
$s = max($xsize / $srcw - $maxclip, 0.0) / (1.0 - $maxclip);
$scale = $maxclip + (1.0 - $maxclip) * $s;
$clipx = $srcw * (1.0 - $scale) / 2.0;
$clipw = $srcw - $clipx * 2;
}
if ($ysize < $srch * 0.5) {
$maxclip = 0.8;
$s = max($ysize / $srch - $maxclip, 0.0) / (1.0 - $maxclip);
$scale = $maxclip + (1.0 - $maxclip) * $s;
$clipy = $srch * (1.0 - $scale) / 2.0;
$cliph = $srch - $clipy * 2;
}
// imagecopyresampled assumes images are at gamma 1.0, while they probably are at 2.2 (sRGB)
// details and examples: http://www.4p8.com/eric.brasseur/gamma.html
imagegammacorrect($image, 2.2, 1.0);
$imageout = imagecreatetruecolor($xsize, $ysize);
imagecopyresampled($imageout, $image, 0, 0, $clipx, $clipy, $xsize, $ysize, $clipw, $cliph);
imagegammacorrect($imageout, 1.0, 2.2);
imagejpeg($imageout, $thumbname);
}
return $thumbname;
}
public function make_grayscale()
{
// create a copy
$dest = $this->image;
unset($this->image);
$this->load();
if (is_resource($dest)) {
// Apply grayscale filter
imagecopymergegray($dest, $this->image, 0, 0, 0, 0, $this->size['width'], $this->size['height'], 0);
imagegammacorrect($dest, 1.0, apply_filters('grayscale_gamma_correction', 0.7));
imagedestroy($this->image);
$this->image = $dest;
return true;
}
}
public function mkticket($data)
{
$this->reload_conf($data['type']);
$this->img = $this->getimg($GLOBALS['genRoot'] . 'frames/' . $this->conf['img']);
if (isset($this->conf['gamma'])) {
imagegammacorrect($this->img, 1.0, $this->conf['gamma']);
}
if (isset($data['firstname']) && $data['firstname']) {
$this->addtext($this->conf['firstname'], $data['firstname']);
} else {
$this->addblank($this->conf['firstname']);
}
if (isset($data['lastname']) && $data['lastname']) {
$this->addtext($this->conf['lastname'], $data['lastname']);
} else {
$this->addblank($this->conf['lastname']);
}
if (isset($data['ticketid'])) {
$this->addtext($this->conf['ticketid'], $data['ticketid']);
}
$this->addtext($this->conf['cb_label'], $data['barcode']);
checksum($data['barcode']);
writecode($this->img, $this->conf['codebar'], $data['barcode']);
}
/**
* Change gamma
*
*/
private function gamma() {
imagegammacorrect($this->im,1,$this->Gamma[1]);
}
<?php
$image = imagecreate(150, 150);
$grey = imagecolorallocate($image, 6, 6, 6);
$gray = imagecolorallocate($image, 15, 15, 15);
$half = imagefilledarc($image, 75, 75, 70, 70, 0, 180, $grey, IMG_ARC_PIE);
$half2 = imagefilledarc($image, 75, 75, 70, 70, 0, -180, $gray, IMG_ARC_PIE);
$gamma = imagegammacorrect($image, 1, 5);
if ($gamma) {
ob_start();
imagepng($image, null, 9);
$img = ob_get_contents();
ob_end_clean();
}
echo md5(base64_encode($img));
/**
* gamma correction
*
* @param float gamma input
* @param float gamma output
* @return ImageWriter
*/
public function gamma($inputgamma, $outputgamma)
{
if (!is_null($this->imageResource)) {
if (!imagegammacorrect($this->imageResource, (double) $inputgamma, (double) $outputgamma)) {
throw new ImageWriterException('Gamma correction failed.');
}
}
return $this;
}
public function correct_gamma($input_gamma, $output_gamma)
{
imagegammacorrect($this->gd, $input_gamma, $output_gamma);
}
/**
* Resize the image proportionally to the given width/height
*
* Note: Some code used in this method is adapted from code found in comments at php.net for the GD functions
*
* @param int $targetWidth Target width in pixels, or 0 for proportional to height
* @param int $targetHeight Target height in pixels, or 0 for proportional to width. Optional-if not specified, 0 is assumed.
* @return bool True if the resize was successful
*
* @todo this method has become too long and needs to be split into smaller dedicated parts
*
*/
public function ___resize($targetWidth, $targetHeight = 0)
{
$orientations = null;
// @horst
$needRotation = $this->autoRotation !== true ? false : ($this->checkOrientation($orientations) && (!empty($orientations[0]) || !empty($orientations[1])) ? true : false);
$needResizing = true;
// $this->isResizeNecessary($targetWidth, $targetHeight);
//if(!$needResizing && !$needRotation) return true;
$source = $this->filename;
$dest = str_replace("." . $this->extension, "_tmp." . $this->extension, $source);
$image = null;
switch ($this->imageType) {
// @teppo
case IMAGETYPE_GIF:
$image = @imagecreatefromgif($source);
break;
case IMAGETYPE_PNG:
$image = @imagecreatefrompng($source);
break;
case IMAGETYPE_JPEG:
$image = @imagecreatefromjpeg($source);
break;
}
if (!$image) {
return false;
}
if ($this->imageType != IMAGETYPE_PNG) {
// @horst: linearize gamma to 1.0 - we do not use gamma correction with png because it doesn't respect transparency
imagegammacorrect($image, 2.0, 1.0);
}
if ($needRotation) {
// @horst
$image = $this->imRotate($image, $orientations[0]);
if ($orientations[0] == 90 || $orientations[0] == 270) {
// we have to swap width & height now!
$tmp = array($targetWidth, $targetHeight);
$targetWidth = $tmp[1];
$targetHeight = $tmp[0];
$tmp = array($this->getWidth(), $this->getHeight());
$this->setImageInfo($tmp[1], $tmp[0]);
}
if ($orientations[1] > 0) {
$image = $this->imFlip($image, $orientations[1] == 2 ? true : false);
}
}
if ($needResizing) {
list($gdWidth, $gdHeight, $targetWidth, $targetHeight) = $this->getResizeDimensions($targetWidth, $targetHeight);
$thumb = imagecreatetruecolor($gdWidth, $gdHeight);
if ($this->imageType == IMAGETYPE_PNG) {
// @adamkiss PNG transparency
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
} else {
if ($this->imageType == IMAGETYPE_GIF) {
// @mrx GIF transparency
$transparentIndex = ImageColorTransparent($image);
$transparentColor = $transparentIndex != -1 ? ImageColorsForIndex($image, $transparentIndex) : 0;
if (!empty($transparentColor)) {
$transparentNew = ImageColorAllocate($thumb, $transparentColor['red'], $transparentColor['green'], $transparentColor['blue']);
$transparentNewIndex = ImageColorTransparent($thumb, $transparentNew);
ImageFill($thumb, 0, 0, $transparentNewIndex);
}
} else {
$bgcolor = imagecolorallocate($thumb, 0, 0, 0);
imagefilledrectangle($thumb, 0, 0, $gdWidth, $gdHeight, $bgcolor);
imagealphablending($thumb, false);
}
}
imagecopyresampled($thumb, $image, 0, 0, 0, 0, $gdWidth, $gdHeight, $this->image['width'], $this->image['height']);
$thumb2 = imagecreatetruecolor($targetWidth, $targetHeight);
if ($this->imageType == IMAGETYPE_PNG) {
// @adamkiss PNG transparency
imagealphablending($thumb2, false);
imagesavealpha($thumb2, true);
} else {
if ($this->imageType == IMAGETYPE_GIF) {
// @mrx GIF transparency
if (!empty($transparentColor)) {
$transparentNew = ImageColorAllocate($thumb2, $transparentColor['red'], $transparentColor['green'], $transparentColor['blue']);
$transparentNewIndex = ImageColorTransparent($thumb2, $transparentNew);
ImageFill($thumb2, 0, 0, $transparentNewIndex);
}
} else {
$bgcolor = imagecolorallocate($thumb2, 0, 0, 0);
imagefilledrectangle($thumb2, 0, 0, $targetWidth, $targetHeight, 0);
imagealphablending($thumb2, false);
}
}
$w1 = $gdWidth / 2 - $targetWidth / 2;
$h1 = $gdHeight / 2 - $targetHeight / 2;
if (is_string($this->cropping)) {
switch ($this->cropping) {
// @interrobang crop directions
case 'nw':
$w1 = 0;
$h1 = 0;
break;
case 'n':
$h1 = 0;
break;
case 'ne':
$w1 = $gdWidth - $targetWidth;
$h1 = 0;
break;
case 'w':
$w1 = 0;
break;
case 'e':
$w1 = $gdWidth - $targetWidth;
break;
case 'sw':
$w1 = 0;
$h1 = $gdHeight - $targetHeight;
break;
case 's':
$h1 = $gdHeight - $targetHeight;
break;
case 'se':
$w1 = $gdWidth - $targetWidth;
$h1 = $gdHeight - $targetHeight;
break;
default:
// center or false, we do nothing
}
} else {
if (is_array($this->cropping)) {
// @interrobang + @u-nikos
if (strpos($this->cropping[0], '%') === false) {
$pointX = (int) $this->cropping[0];
} else {
$pointX = $gdWidth * ((int) $this->cropping[0] / 100);
}
if (strpos($this->cropping[1], '%') === false) {
$pointY = (int) $this->cropping[1];
} else {
$pointY = $gdHeight * ((int) $this->cropping[1] / 100);
}
if ($pointX < $targetWidth / 2) {
$w1 = 0;
} else {
if ($pointX > $gdWidth - $targetWidth / 2) {
$w1 = $gdWidth - $targetWidth;
} else {
$w1 = $pointX - $targetWidth / 2;
}
}
if ($pointY < $targetHeight / 2) {
$h1 = 0;
} else {
if ($pointY > $gdHeight - $targetHeight / 2) {
$h1 = $gdHeight - $targetHeight;
} else {
$h1 = $pointY - $targetHeight / 2;
}
}
}
}
imagecopyresampled($thumb2, $thumb, 0, 0, $w1, $h1, $targetWidth, $targetHeight, $targetWidth, $targetHeight);
if ($this->sharpening && $this->sharpening != 'none') {
$image = $this->imSharpen($thumb2, $this->sharpening);
}
// @horst
}
// write to file
$result = false;
switch ($this->imageType) {
case IMAGETYPE_GIF:
// correct gamma from linearized 1.0 back to 2.0
imagegammacorrect($thumb2, 1.0, 2.0);
$result = imagegif($thumb2, $dest);
break;
case IMAGETYPE_PNG:
// convert 1-100 (worst-best) scale to 0-9 (best-worst) scale for PNG
$quality = round(abs(($this->quality - 100) / 11.111111));
$result = imagepng($thumb2, $dest, $quality);
break;
case IMAGETYPE_JPEG:
// correct gamma from linearized 1.0 back to 2.0
imagegammacorrect($thumb2, 1.0, 2.0);
$result = imagejpeg($thumb2, $dest, $this->quality);
break;
}
@imagedestroy($image);
// @horst
if (isset($thumb) && is_resource($thumb)) {
@imagedestroy($thumb);
}
// @horst
if (isset($thumb2) && is_resource($thumb2)) {
@imagedestroy($thumb2);
}
// @horst
if ($result === false) {
if (is_file($dest)) {
@unlink($dest);
}
return false;
}
unlink($source);
rename($dest, $source);
// @horst: if we've retrieved IPTC-Metadata from sourcefile, we write it back now
if ($this->iptcRaw) {
$content = iptcembed($this->iptcPrepareData(), $this->filename);
if ($content !== false) {
$dest = preg_replace('/\\.' . $this->extension . '$/', '_tmp.' . $this->extension, $this->filename);
if (strlen($content) == @file_put_contents($dest, $content, LOCK_EX)) {
// on success we replace the file
unlink($this->filename);
rename($dest, $this->filename);
} else {
// it was created a temp diskfile but not with all data in it
if (file_exists($dest)) {
@unlink($dest);
}
}
}
}
$this->loadImageInfo($this->filename);
$this->modified = true;
return true;
}
function tweak_wm_preview_images($ref, $rotateangle, $gamma, $extension = "jpg")
{
$ps = sql_query("select * from preview_size where (internal=1 or allow_preview=1)");
for ($n = 0; $n < count($ps); $n++) {
$wm_file = get_resource_path($ref, true, $ps[$n]["id"], false, $extension, -1, 1, true);
if (!file_exists($wm_file)) {
return false;
}
list($sw, $sh) = @getimagesize($wm_file);
$wm_source = imagecreatefromjpeg($wm_file);
# Apply tweaks
if ($rotateangle != 0) {
# Use built-in function if available, else use function in this file
if (function_exists("imagerotate")) {
$wm_source = imagerotate($wm_source, $rotateangle, 0);
} else {
$wm_source = AltImageRotate($wm_source, $rotateangle);
}
}
if ($gamma != 0) {
imagegammacorrect($wm_source, 1.0, $gamma);
}
imagejpeg($wm_source, $wm_file, 95);
list($tw, $th) = @getimagesize($wm_file);
if ($rotateangle != 0) {
$temp = $sw;
$sw = $sh;
$sh = $temp;
}
# Rescale image
$wm_target = imagecreatetruecolor($sw, $sh);
imagecopyresampled($wm_target, $wm_source, 0, 0, 0, 0, $sw, $sh, $tw, $th);
imagejpeg($wm_target, $wm_file, 95);
}
}
/**
* Applies gamma correction to a given image
*
* @param \Intervention\Image\Image $image
* @return boolean
*/
public function execute($image)
{
$gamma = $this->argument(0)->type('numeric')->required()->value();
return imagegammacorrect($image->getCore(), 1, $gamma);
}
/**
* Applies gamma correction
*
* @param float $input
* @param float $output
* @return Image
*/
public function gamma($input, $output)
{
imagegammacorrect($this->resource, $input, $output);
return $this;
}
public function washed()
{
imagefilter($this->image, IMG_FILTER_BRIGHTNESS, 30);
imagefilter($this->image, IMG_FILTER_NEGATE);
imagefilter($this->image, IMG_FILTER_COLORIZE, -50, 0, 20, 50);
imagefilter($this->image, IMG_FILTER_NEGATE);
imagefilter($this->image, IMG_FILTER_BRIGHTNESS, 10);
imagegammacorrect($this->image, 1, 1.2);
return $this;
}
public function effect($resource)
{
imagegammacorrect($resource, 1, 1.2);
imagefilter($resource, IMG_FILTER_CONTRAST, -1);
imagefilter($resource, IMG_FILTER_COLORIZE, 60, 20, 0, 50);
}
/**
* Applies the filter to the resource
*
* @param ImageResource $aResource
*/
public function applyFilter(ImageResource $aResource)
{
imagegammacorrect($aResource->getResource(), $this->input, $this->output);
}
<?php $image = imagecreatetruecolor(180, 30); $gamma = imagegammacorrect($image, 1, 'string');
/**
* apply GammaCorrection to an image (@horst)
*
* with mode = true it linearizes an image to 1
* with mode = false it set it back to the originating gamma value
*
* @param GD-image-resource $image
* @param boolean $mode
*
*/
protected function gammaCorrection(&$image, $mode)
{
if (-1 == $this->defaultGamma || !is_bool($mode)) {
return;
}
if ($mode) {
// linearizes to 1.0
if (imagegammacorrect($image, $this->defaultGamma, 1.0)) {
$this->gammaLinearized = true;
}
} else {
if (!isset($this->gammaLinearized) || !$this->gammaLinearized) {
return;
}
// switch back to original Gamma
if (imagegammacorrect($image, 1.0, $this->defaultGamma)) {
unset($this->gammaLinearized);
}
}
}
/**
* Apply gamma correction to this image
*
* @param float in
* @param float out
* @return bool success
*/
public function correctGamma($in, $out)
{
return imagegammacorrect($this->handle, $in, $out);
}
/**
* Adjusts the image gamma
*
* @access public
* @param float $gamma
* @return mixed True if success or a Jaws_Error on error
*/
function gamma($gamma = 1.0)
{
$res = imagegammacorrect($this->_hImage, 1.0, $gamma);
if (false === $res) {
return Jaws_Error::raiseError('Failed transformation: gamma().', __FUNCTION__);
}
return true;
}
/**
* Apply Gamma Correction for given gd resource
* @param resource $virtual_image gd resource
* @param float $level level of correction in range(0.01,4.99) where 1.00 = no change
* @return boolean true on success false otherwise
*/
public static function gamma($virtual_image, $level)
{
if (@get_resource_type($virtual_image) != TIP_RT) {
self::logger("gamma", " Not A GD Resource");
return false;
}
self::activateAlphaChannel($virtual_image);
$level = (double) $level;
$level = $level >= 0.01 && $level <= 4.99 ? $level : 1.0;
return @imagegammacorrect($virtual_image, 1.0, $level);
}
/**
* Executes imagegammacorrect()
*
* @param WideImage_Image $image
* @param numeric $input_gamma
* @param numeric $output_gamma
* @return WideImage_TrueColorImage
*/
function execute($image, $input_gamma, $output_gamma)
{
$new = $image->copy();
imagegammacorrect($new->getHandle(), $input_gamma, $output_gamma);
return $new;
}
/**
* {@inheritdoc}
*/
protected function doApply(CanvasInterface $canvas)
{
imagegammacorrect($canvas->getHandler(), 1.0, $this->getLevel());
}
/**
* Apply the transform to the sfImage object.
*
* @param sfImage
* @return sfImage
*/
protected function transform(sfImage $image)
{
$resource = $image->getAdapter()->getHolder();
imagegammacorrect($resource, $this->input_gamma, $this->output_gamma);
return $image;
}
public function gamma($level)
{
return imagegammacorrect($this->image->getResource(), 1.0, (double) $level);
}
