public function WatermarkOverlay(&$gdimg_dest, &$img_watermark, $alignment = '*', $opacity = 50, $margin_x = 5, $margin_y = null)
{
if (is_resource($gdimg_dest) && is_resource($img_watermark)) {
$watermark_source_x = 0;
$watermark_source_y = 0;
$img_source_width = ImageSX($gdimg_dest);
$img_source_height = ImageSY($gdimg_dest);
$watermark_source_width = ImageSX($img_watermark);
$watermark_source_height = ImageSY($img_watermark);
$watermark_opacity_percent = max(0, min(100, $opacity));
$margin_y = is_null($margin_y) ? $margin_x : $margin_y;
$watermark_margin_x = $margin_x > 0 && $margin_x < 1 ? round((1 - $margin_x) * $img_source_width) : $margin_x;
$watermark_margin_y = $margin_y > 0 && $margin_y < 1 ? round((1 - $margin_y) * $img_source_height) : $margin_y;
if (preg_match('#^([0-9\\.\\-]*)x([0-9\\.\\-]*)$#i', $alignment, $matches)) {
$watermark_destination_x = intval($matches[1]);
$watermark_destination_y = intval($matches[2]);
} else {
switch ($alignment) {
case '*':
if ($gdimg_tiledwatermark = phpthumb_functions::ImageCreateFunction($img_source_width, $img_source_height)) {
ImageAlphaBlending($gdimg_tiledwatermark, false);
ImageSaveAlpha($gdimg_tiledwatermark, true);
$text_color_transparent = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg_tiledwatermark, 255, 0, 255, 127);
ImageFill($gdimg_tiledwatermark, 0, 0, $text_color_transparent);
// set the tiled image transparent color to whatever the untiled image transparency index is
// ImageColorTransparent($gdimg_tiledwatermark, ImageColorTransparent($img_watermark));
// a "cleaner" way of doing it, but can't handle the margin feature :(
// ImageSetTile($gdimg_tiledwatermark, $img_watermark);
// ImageFill($gdimg_tiledwatermark, 0, 0, IMG_COLOR_TILED);
// break;
// ImageFill($gdimg_tiledwatermark, 0, 0, ImageColorTransparent($gdimg_tiledwatermark));
// tile the image as many times as can fit
for ($x = $watermark_margin_x; $x < $img_source_width + $watermark_source_width; $x += $watermark_source_width + $watermark_margin_x) {
for ($y = $watermark_margin_y; $y < $img_source_height + $watermark_source_height; $y += $watermark_source_height + $watermark_margin_y) {
ImageCopy($gdimg_tiledwatermark, $img_watermark, $x, $y, 0, 0, min($watermark_source_width, $img_source_width - $x - $watermark_margin_x), min($watermark_source_height, $img_source_height - $y - $watermark_margin_y));
}
}
$watermark_source_width = ImageSX($gdimg_tiledwatermark);
$watermark_source_height = ImageSY($gdimg_tiledwatermark);
$watermark_destination_x = 0;
$watermark_destination_y = 0;
ImageDestroy($img_watermark);
$img_watermark = $gdimg_tiledwatermark;
}
break;
case 'T':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2 + $watermark_margin_x);
$watermark_destination_y = $watermark_margin_y;
break;
case 'B':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2 + $watermark_margin_x);
$watermark_destination_y = $img_source_height - $watermark_source_height - $watermark_margin_y;
break;
case 'L':
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2 + $watermark_margin_y);
break;
case 'R':
$watermark_destination_x = $img_source_width - $watermark_source_width - $watermark_margin_x;
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2 + $watermark_margin_y);
break;
case 'C':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2);
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2);
break;
case 'TL':
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = $watermark_margin_y;
break;
case 'TR':
$watermark_destination_x = $img_source_width - $watermark_source_width - $watermark_margin_x;
$watermark_destination_y = $watermark_margin_y;
break;
case 'BL':
//echo '<pre>';
////var_dump($watermark_destination_x);
////var_dump($watermark_destination_y);
//var_dump($watermark_margin_x);
//var_dump($img_source_height);
//var_dump($watermark_source_height);
//var_dump($watermark_margin_y);
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = $img_source_height - $watermark_source_height - $watermark_margin_y;
break;
case 'BR':
default:
$watermark_destination_x = $img_source_width - $watermark_source_width - $watermark_margin_x;
$watermark_destination_y = $img_source_height - $watermark_source_height - $watermark_margin_y;
break;
}
}
ImageAlphaBlending($gdimg_dest, false);
ImageSaveAlpha($gdimg_dest, true);
ImageSaveAlpha($img_watermark, true);
phpthumb_functions::ImageCopyRespectAlpha($gdimg_dest, $img_watermark, $watermark_destination_x, $watermark_destination_y, 0, 0, $watermark_source_width, $watermark_source_height, $watermark_opacity_percent);
return true;
}
return false;
}
function ImageCopyRespectAlpha(&$dst_im, &$src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $opacity_pct = 100)
{
$opacipct = $opacity_pct / 100;
for ($x = $src_x; $x < $src_w; $x++) {
for ($y = $src_y; $y < $src_h; $y++) {
$RealPixel = phpthumb_functions::GetPixelColor($dst_im, $dst_x + $x, $dst_y + $y);
$OverlayPixel = phpthumb_functions::GetPixelColor($src_im, $x, $y);
$alphapct = $OverlayPixel['alpha'] / 127;
$overlaypct = (1 - $alphapct) * $opacipct;
$newcolor = phpthumb_functions::ImageColorAllocateAlphaSafe($dst_im, round($RealPixel['red'] * (1 - $overlaypct)) + $OverlayPixel['red'] * $overlaypct, round($RealPixel['green'] * (1 - $overlaypct)) + $OverlayPixel['green'] * $overlaypct, round($RealPixel['blue'] * (1 - $overlaypct)) + $OverlayPixel['blue'] * $overlaypct, 0);
ImageSetPixel($dst_im, $dst_x + $x, $dst_y + $y, $newcolor);
}
}
return true;
}
function CreateGDoutput()
{
$this->CalculateThumbnailDimensions();
// Create the GD image (either true-color or 256-color, depending on GD version)
$this->gdimg_output = phpthumb_functions::ImageCreateFunction($this->thumbnail_width, $this->thumbnail_height);
// Images that have transparency must have the background filled with the configured 'bg' color
// otherwise the transparent color will appear as black
ImageSaveAlpha($this->gdimg_output, true);
if ($this->is_alpha && phpthumb_functions::gd_version() >= 2) {
ImageAlphaBlending($this->gdimg_output, false);
$output_full_alpha = phpthumb_functions::ImageColorAllocateAlphaSafe($this->gdimg_output, 255, 255, 255, 127);
ImageFilledRectangle($this->gdimg_output, 0, 0, $this->thumbnail_width, $this->thumbnail_height, $output_full_alpha);
} else {
$current_transparent_color = ImageColorTransparent($this->gdimg_source);
if ($this->bg || @$current_transparent_color >= 0) {
$this->config_background_hexcolor = $this->bg ? $this->bg : $this->config_background_hexcolor;
if (!phpthumb_functions::IsHexColor($this->config_background_hexcolor)) {
return $this->ErrorImage('Invalid hex color string "' . $this->config_background_hexcolor . '" for parameter "bg"');
}
$background_color = phpthumb_functions::ImageHexColorAllocate($this->gdimg_output, $this->config_background_hexcolor);
ImageFilledRectangle($this->gdimg_output, 0, 0, $this->thumbnail_width, $this->thumbnail_height, $background_color);
}
}
$this->DebugMessage('CreateGDoutput() returning canvas "' . $this->thumbnail_width . 'x' . $this->thumbnail_height . '"', __FILE__, __LINE__);
return true;
}
function WatermarkOverlay(&$gdimg_dest, &$img_watermark, $alignment = '*', $opacity = 50, $margin = 5)
{
if (is_resource($gdimg_dest) && is_resource($img_watermark)) {
$watermark_source_x = 0;
$watermark_source_y = 0;
$img_source_width = ImageSX($gdimg_dest);
$img_source_height = ImageSY($gdimg_dest);
$watermark_source_width = ImageSX($img_watermark);
$watermark_source_height = ImageSY($img_watermark);
$watermark_opacity_percent = max(0, min(100, $opacity));
if ($margin < 1) {
$watermark_margin_percent = 1 - $margin;
} else {
$watermark_margin_percent = (100 - max(0, min(100, $margin))) / 100;
}
$watermark_margin_x = round((1 - $watermark_margin_percent) * $img_source_width);
$watermark_margin_y = round((1 - $watermark_margin_percent) * $img_source_height);
switch ($alignment) {
case '*':
if ($gdimg_tiledwatermark = phpthumb_functions::ImageCreateFunction($img_source_width, $img_source_height)) {
ImageAlphaBlending($gdimg_tiledwatermark, false);
if (phpthumb_functions::version_compare_replacement(phpversion(), '4.3.2', '>=')) {
ImageSaveAlpha($gdimg_tiledwatermark, true);
}
$text_color_transparent = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg_tiledwatermark, 255, 0, 255, 127);
ImageFill($gdimg_tiledwatermark, 0, 0, $text_color_transparent);
// set the tiled image transparent color to whatever the untiled image transparency index is
// ImageColorTransparent($gdimg_tiledwatermark, ImageColorTransparent($img_watermark));
// a "cleaner" way of doing it, but can't handle the margin feature :(
// ImageSetTile($gdimg_tiledwatermark, $img_watermark);
// ImageFill($gdimg_tiledwatermark, 0, 0, IMG_COLOR_TILED);
// break;
// ImageFill($gdimg_tiledwatermark, 0, 0, ImageColorTransparent($gdimg_tiledwatermark));
// tile the image as many times as can fit
for ($x = $watermark_margin_x; $x < $img_source_width + $watermark_source_width; $x += round($watermark_source_width + (1 - $watermark_margin_percent) * $img_source_width)) {
for ($y = $watermark_margin_y; $y < $img_source_height + $watermark_source_height; $y += round($watermark_source_height + (1 - $watermark_margin_percent) * $img_source_height)) {
ImageCopy($gdimg_tiledwatermark, $img_watermark, $x, $y, 0, 0, min($watermark_source_width, $img_source_width - $x - (1 - $watermark_margin_percent) * $img_source_width), min($watermark_source_height, $img_source_height - $y - (1 - $watermark_margin_percent) * $img_source_height));
}
}
$watermark_source_width = ImageSX($gdimg_tiledwatermark);
$watermark_source_height = ImageSY($gdimg_tiledwatermark);
$watermark_destination_x = 0;
$watermark_destination_y = 0;
ImageDestroy($img_watermark);
$img_watermark = $gdimg_tiledwatermark;
}
break;
case 'T':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2 + $watermark_margin_x);
$watermark_destination_y = $watermark_margin_y;
break;
case 'B':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2 + $watermark_margin_x);
$watermark_destination_y = round(($img_source_height - $watermark_source_height) * $watermark_margin_percent);
break;
case 'L':
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2 + $watermark_margin_y);
break;
case 'R':
$watermark_destination_x = round(($img_source_width - $watermark_source_width) * $watermark_margin_percent);
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2 + $watermark_margin_y);
break;
case 'C':
$watermark_destination_x = round($img_source_width / 2 - $watermark_source_width / 2);
$watermark_destination_y = round($img_source_height / 2 - $watermark_source_height / 2);
break;
case 'TL':
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = $watermark_margin_y;
break;
case 'TR':
$watermark_destination_x = round(($img_source_width - $watermark_source_width) * $watermark_margin_percent);
$watermark_destination_y = $watermark_margin_y;
break;
case 'BL':
$watermark_destination_x = $watermark_margin_x;
$watermark_destination_y = round(($img_source_height - $watermark_source_height) * $watermark_margin_percent);
break;
case 'BR':
default:
$watermark_destination_x = round(($img_source_width - $watermark_source_width) * $watermark_margin_percent);
$watermark_destination_y = round(($img_source_height - $watermark_source_height) * $watermark_margin_percent);
break;
}
ImageAlphaBlending($gdimg_dest, false);
if (phpthumb_functions::version_compare_replacement(phpversion(), '4.3.2', '>=')) {
ImageSaveAlpha($gdimg_dest, true);
ImageSaveAlpha($img_watermark, true);
}
phpthumb_functions::ImageCopyRespectAlpha($gdimg_dest, $img_watermark, $watermark_destination_x, $watermark_destination_y, 0, 0, $watermark_source_width, $watermark_source_height, $watermark_opacity_percent);
return true;
}
return false;
}
function Threshold(&$gdimg, $cutoff)
{
$cutoff = $cutoff ? $cutoff : 128;
for ($x = 0; $x < ImageSX($gdimg); $x++) {
for ($y = 0; $y < ImageSY($gdimg); $y++) {
$currentPixel = phpthumb_functions::GetPixelColor($gdimg, $x, $y);
$grayPixel = phpthumb_functions::GrayscalePixel($currentPixel);
if ($grayPixel['red'] < $cutoff) {
$newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, 0x0, 0x0, 0x0, $currentPixel['alpha']);
} else {
$newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, 0xff, 0xff, 0xff, $currentPixel['alpha']);
}
ImageSetPixel($gdimg, $x, $y, $newColor);
}
}
return true;
}
public function WhiteBalance(&$gdimg, $targetColor = '')
{
if (phpthumb_functions::IsHexColor($targetColor)) {
$targetPixel = array('red' => hexdec(substr($targetColor, 0, 2)), 'green' => hexdec(substr($targetColor, 2, 2)), 'blue' => hexdec(substr($targetColor, 4, 2)));
} else {
$Analysis = phpthumb_filters::HistogramAnalysis($gdimg, false);
$targetPixel = array('red' => max(array_keys($Analysis['red'])), 'green' => max(array_keys($Analysis['green'])), 'blue' => max(array_keys($Analysis['blue'])));
}
$grayValue = phpthumb_functions::GrayscaleValue($targetPixel['red'], $targetPixel['green'], $targetPixel['blue']);
$scaleR = $grayValue / $targetPixel['red'];
$scaleG = $grayValue / $targetPixel['green'];
$scaleB = $grayValue / $targetPixel['blue'];
for ($x = 0; $x < ImageSX($gdimg); $x++) {
for ($y = 0; $y < ImageSY($gdimg); $y++) {
$currentPixel = phpthumb_functions::GetPixelColor($gdimg, $x, $y);
$newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, max(0, min(255, round($currentPixel['red'] * $scaleR))), max(0, min(255, round($currentPixel['green'] * $scaleG))), max(0, min(255, round($currentPixel['blue'] * $scaleB))), $currentPixel['alpha']);
ImageSetPixel($gdimg, $x, $y, $newColor);
}
}
return true;
}
