本文整理汇总了PHP中ImageFilter函数的典型用法代码示例。如果您正苦于以下问题：PHP ImageFilter函数的具体用法？PHP ImageFilter怎么用？PHP ImageFilter使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了ImageFilter函数的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的PHP代码示例。
示例1: Smooth
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, ' . $amount . ') [function not implemented]', __FILE__, __LINE__);
return false;
}示例2: applyUnsharpMask
function applyUnsharpMask(&$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.........
示例3: brightness_gd
/**
* increase or decrease the brightness of an image useing GD library;
* @param string $filename to the source file
* @param string $direction increase or decrease;
* @return nothing;
* @access private
*/
function brightness_gd($filename, $direction)
{
if (substr(PHP_VERSION, 0, 1) < 5) {
return false;
}
if (!function_exists('imagefilter')) {
return false;
}
if (!$this->gdInfo >= 1 || !$this->checkGdFileType($filename)) {
return false;
}
$srcImage =& $this->getImg($filename);
if ($this->hasError()) {
return false;
}
if (strtolower($direction) == 'decrease') {
$arg = -6;
} else {
$arg = 6;
}
ImageFilter($srcImage, IMG_FILTER_BRIGHTNESS, $arg);
$this->createNewImg($srcImage, $filename, $this->qualityLevel);
return true;
}示例4: ApplyFilters
//.........这里部分代码省略.........
break;
case 'fram':
// Frame
@(list($frame_width, $edge_width, $color_frame, $color1, $color2) = explode('|', $parameter, 5));
$phpthumbFilters->Frame($this->gdimg_output, $frame_width, $edge_width, $color_frame, $color1, $color2);
break;
case 'drop':
// DropShadow
if (phpthumb_functions::gd_version() < 2) {
$this->DebugMessage('Skipping DropShadow() because gd_version is "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__);
return false;
}
$this->is_alpha = true;
@(list($distance, $width, $color, $angle, $fade) = explode('|', $parameter, 5));
$phpthumbFilters->DropShadow($this->gdimg_output, $distance, $width, $color, $angle, $fade);
break;
case 'mask':
// Mask cropping
if (phpthumb_functions::gd_version() < 2) {
$this->DebugMessage('Skipping Mask() because gd_version is "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__);
return false;
}
@(list($mask_filename, $invert) = explode('|', $parameter, 2));
$mask_filename = $this->ResolveFilenameToAbsolute($mask_filename);
if (@is_readable($mask_filename) && ($fp_mask = @fopen($mask_filename, 'rb'))) {
$MaskImageData = '';
do {
$buffer = fread($fp_mask, 8192);
$MaskImageData .= $buffer;
} while (strlen($buffer) > 0);
fclose($fp_mask);
if ($gdimg_mask = $this->ImageCreateFromStringReplacement($MaskImageData)) {
if ($invert && phpthumb_functions::version_compare_replacement(phpversion(), '5.0.0', '>=') && phpthumb_functions::gd_is_bundled()) {
ImageFilter($gdimg_mask, IMG_FILTER_NEGATE);
}
$this->is_alpha = true;
$phpthumbFilters->ApplyMask($gdimg_mask, $this->gdimg_output);
ImageDestroy($gdimg_mask);
} else {
$this->DebugMessage('ImageCreateFromStringReplacement() failed for "' . $mask_filename . '"', __FILE__, __LINE__);
}
} else {
$this->DebugMessage('Cannot open mask file "' . $mask_filename . '"', __FILE__, __LINE__);
}
break;
case 'elip':
// Elipse cropping
if (phpthumb_functions::gd_version() < 2) {
$this->DebugMessage('Skipping Elipse() because gd_version is "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__);
return false;
}
$this->is_alpha = true;
$phpthumbFilters->Elipse($this->gdimg_output);
break;
case 'ric':
// RoundedImageCorners
if (phpthumb_functions::gd_version() < 2) {
$this->DebugMessage('Skipping RoundedImageCorners() because gd_version is "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__);
return false;
}
@(list($radius_x, $radius_y) = explode('|', $parameter, 2));
if ($radius_x < 1 || $radius_y < 1) {
$this->DebugMessage('Skipping RoundedImageCorners(' . $radius_x . ', ' . $radius_y . ') because x/y radius is less than 1', __FILE__, __LINE__);
break;
}
$this->is_alpha = true;示例5: Negate_Image
function Negate_Image()
{
if (!ImageFilter($this->image, IMG_FILTER_NEGATE)) {
return False;
} else {
return True;
}
}