public function _IMagickLuminanceSource($image, $width, $height)
{
parent::__construct($width, $height);
$this->dataWidth = $width;
$this->dataHeight = $height;
$this->left = 0;
$this->top = 0;
$this->image = $image;
// In order to measure pure decoding speed, we convert the entire image to a greyscale array
// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
$this->luminances = array();
$image->setImageColorspace(\Imagick::COLORSPACE_GRAY);
// $image->newPseudoImage(0, 0, "magick:rose");
$pixels = $image->exportImagePixels(1, 1, $width, $height, "RGB", \Imagick::COLORSPACE_RGB);
$array = array();
$rgb = array();
for ($i = 0; $i < count($pixels); $i += 3) {
$r = $pixels[$i] & 0xff;
$g = $pixels[$i + 1] & 0xff;
$b = $pixels[$i + 2] & 0xff;
if ($r == $g && $g == $b) {
// Image is already greyscale, so pick any channel.
$this->luminances[] = $r;
//(($r + 128) % 256) - 128;
} else {
// Calculate luminance cheaply, favoring green.
$this->luminances[] = ($r + 2 * $g + $b) / 4;
//(((($r + 2 * $g + $b) / 4) + 128) % 256) - 128;
}
}
}
public function GDLuminanceSource($gdImage, $width, $height)
{
parent::__construct($width, $height);
$this->dataWidth = $width;
$this->dataHeight = $height;
$this->left = 0;
$this->top = 0;
$this->{$gdImage} = $gdImage;
// In order to measure pure decoding speed, we convert the entire image to a greyscale array
// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
$this->luminances = array();
//$this->luminances = $this->grayScaleToBitmap($this->grayscale());
$array = array();
$rgb = array();
for ($j = 0; $j < $height; $j++) {
for ($i = 0; $i < $width; $i++) {
$argb = imagecolorat($this->{$gdImage}, $i, $j);
$pixel = imagecolorsforindex($this->{$gdImage}, $argb);
$r = $pixel['red'];
$g = $pixel['green'];
$b = $pixel['blue'];
if ($r == $g && $g == $b) {
// Image is already greyscale, so pick any channel.
$this->luminances[] = $r;
//(($r + 128) % 256) - 128;
} else {
// Calculate luminance cheaply, favoring green.
$this->luminances[] = ($r + 2 * $g + $b) / 4;
//(((($r + 2 * $g + $b) / 4) + 128) % 256) - 128;
}
}
}
/*
for ($y = 0; $y < $height; $y++) {
$offset = $y * $width;
for ($x = 0; $x < $width; $x++) {
$pixel = $pixels[$offset + $x];
$r = ($pixel >> 16) & 0xff;
$g = ($pixel >> 8) & 0xff;
$b = $pixel & 0xff;
if ($r == $g && $g == $b) {
// Image is already greyscale, so pick any channel.
$this->luminances[intval($offset + $x)] = (($r+128) % 256) - 128;
} else {
// Calculate luminance cheaply, favoring green.
$this->luminances[intval($offset + $x)] = (((($r + 2 * $g + $b) / 4)+128)%256) - 128;
}
}
*/
//}
// $this->luminances = $this->grayScaleToBitmap($this->luminances);
}
public function __construct($yuvData, $dataWidth, $dataHeight, $left, $top, $width, $height, $reverseHorizontal)
{
parent::__construct($width, $height);
if ($left + $width > $dataWidth || $top + $height > $dataHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}
$this->yuvData = $yuvData;
$this->dataWidth = $dataWidth;
$this->dataHeight = $dataHeight;
$this->left = $left;
$this->top = $top;
if ($reverseHorizontal) {
$this->reverseHorizontal($width, $height);
}
}
public function RGBLuminanceSource_($width, $height, $pixels)
{
parent::__construct($width, $height);
$this->dataWidth = $width;
$this->dataHeight = $height;
$this->left = 0;
$this->top = 0;
$this->pixels = $pixels;
// In order to measure pure decoding speed, we convert the entire image to a greyscale array
// up front, which is the same as the Y channel of the YUVLuminanceSource in the real app.
$this->luminances = array();
//$this->luminances = $this->grayScaleToBitmap($this->grayscale());
foreach ($pixels as $key => $pixel) {
$r = $pixel['red'];
$g = $pixel['green'];
$b = $pixel['blue'];
/* if (($pixel & 0xFF000000) == 0) {
$pixel = 0xFFFFFFFF; // = white
}
// .229R + 0.587G + 0.114B (YUV/YIQ for PAL and NTSC)
$this->luminances[$key] =
(306 * (($pixel >> 16) & 0xFF) +
601 * (($pixel >> 8) & 0xFF) +
117 * ($pixel & 0xFF) +
0x200) >> 10;
*/
//$r = ($pixel >> 16) & 0xff;
//$g = ($pixel >> 8) & 0xff;
//$b = $pixel & 0xff;
if ($r == $g && $g == $b) {
// Image is already greyscale, so pick any channel.
$this->luminances[$key] = $r;
//(($r + 128) % 256) - 128;
} else {
// Calculate luminance cheaply, favoring green.
$this->luminances[$key] = ($r + 2 * $g + $b) / 4;
//(((($r + 2 * $g + $b) / 4) + 128) % 256) - 128;
}
}
/*
for ($y = 0; $y < $height; $y++) {
$offset = $y * $width;
for ($x = 0; $x < $width; $x++) {
$pixel = $pixels[$offset + $x];
$r = ($pixel >> 16) & 0xff;
$g = ($pixel >> 8) & 0xff;
$b = $pixel & 0xff;
if ($r == $g && $g == $b) {
// Image is already greyscale, so pick any channel.
$this->luminances[intval($offset + $x)] = (($r+128) % 256) - 128;
} else {
// Calculate luminance cheaply, favoring green.
$this->luminances[intval($offset + $x)] = (((($r + 2 * $g + $b) / 4)+128)%256) - 128;
}
}
*/
//}
// $this->luminances = $this->grayScaleToBitmap($this->luminances);
}