imagecolorat(3) [php man page]

IMAGECOLORAT(3) 							 1							   IMAGECOLORAT(3)

imagecolorat - Get the index of the color of a pixel

SYNOPSIS

       int imagecolorat (resource  $image, int	$x, int  $y)

DESCRIPTION

	Returns the index of the color of the pixel at the specified location in the image specified by $image.

	If  PHP is compiled against GD library 2.0 or higher and the image is a truecolor image, this function returns the RGB value of that pixel
       as integer. Use bitshifting and masking to access the distinct red, green and blue component values:

PARAMETERS

	      o $
		image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).

	      o $x
		- x-coordinate of the point.

	      o $y
		- y-coordinate of the point.

RETURN VALUES

	Returns the index of the color.

EXAMPLES

       Example #1

	      Access distinct RGB values

	      <?php
	      $im = imagecreatefrompng("php.png");
	      $rgb = imagecolorat($im, 10, 15);
	      $r = ($rgb >> 16) & 0xFF;
	      $g = ($rgb >> 8) & 0xFF;
	      $b = $rgb & 0xFF;

	      var_dump($r, $g, $b);
	      ?>

	      The above example will output something similar to:

	      int(119)
	      int(123)
	      int(180)

       Example #2

	      Human-readable RGB values using imagecolorsforindex(3)

	      <?php
	      $im = imagecreatefrompng("php.png");
	      $rgb = imagecolorat($im, 10, 15);

	      $colors = imagecolorsforindex($im, $rgb);

	      var_dump($colors);
	      ?>

	      The above example will output something similar to:

	      array(4) {
		["red"]=>
		int(119)
		["green"]=>
		int(123)
		["blue"]=>
		int(180)
		["alpha"]=>
		int(127)
	      }

SEE ALSO

       imagecolorset(3), imagecolorsforindex(3), imagesetpixel(3).

PHP Documentation Group 													   IMAGECOLORAT(3)

IMAGESETSTYLE(3)							 1							  IMAGESETSTYLE(3)

imagesetstyle - Set the style for line drawing

SYNOPSIS

       bool imagesetstyle (resource  $image, array  $style)

DESCRIPTION

       imagesetstyle(3)  sets  the style to be used by all line drawing functions (such as imageline(3) and imagepolygon(3)) when drawing with the
       special color IMG_COLOR_STYLED or lines of images with color IMG_COLOR_STYLEDBRUSHED.

PARAMETERS

	      o $
		image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).

	      o $style
		- An array of pixel colors. You can use the IMG_COLOR_TRANSPARENT constant to add a transparent pixel.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

	Following example script draws a dashed line from upper left to lower right corner of the canvas:

       Example #1

	      imagesetstyle(3) example

	      <?php
	      header("Content-type: image/jpeg");
	      $im  = imagecreatetruecolor(100, 100);
	      $w   = imagecolorallocate($im, 255, 255, 255);
	      $red = imagecolorallocate($im, 255, 0, 0);

	      /* Draw a dashed line, 5 red pixels, 5 white pixels */
	      $style = array($red, $red, $red, $red, $red, $w, $w, $w, $w, $w);
	      imagesetstyle($im, $style);
	      imageline($im, 0, 0, 100, 100, IMG_COLOR_STYLED);

	      /* Draw a line of happy faces using imagesetbrush() with imagesetstyle */
	      $style = array($w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $red);
	      imagesetstyle($im, $style);

	      $brush = imagecreatefrompng("http://www.libpng.org/pub/png/images/smile.happy.png");
	      $w2 = imagecolorallocate($brush, 255, 255, 255);
	      imagecolortransparent($brush, $w2);
	      imagesetbrush($im, $brush);
	      imageline($im, 100, 0, 0, 100, IMG_COLOR_STYLEDBRUSHED);

	      imagejpeg($im);
	      imagedestroy($im);
	      ?>

	      The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : imagesetstyle()

SEE ALSO

       imagesetbrush(3), imageline(3).

PHP Documentation Group 													  IMAGESETSTYLE(3)