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Digg imagecolorclosest
Get the index of the closest color to the specified color
(PHP 4, PHP 5)
Returns the index of the color in the palette of the image which is "closest" to the specified RGB value. The "distance" between the desired color and each color in the palette is calculated as if the RGB values represented points in three-dimensional space. If you created the image from a file, only colors used in the image are resolved. Colors present only in the pallete are not resolved. Parameters
The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. Return ValuesReturns the index of the closest color, in the palette of the image, to the specified one
See Also
Code Examples / Notes » imagecolorclosestvikrant korde
This functuion is useful when you are dealing with previously present images like .png, .jpg, etc. You can use this function for writing a text on the image. For me the function imagecolorallocate() was returning the -1 value. after lot of RnD and site search i found a function use of imagecolorclosest(). This solved my problem of writing the text on the image with customised color. Actually previously it was writing on the image but the color was not distinct. It was using the same color as of that background image. The following code segment was fine with me. header ("Content-type: image/jpeg"); $im = imagecreatefromjpeg("BlankButton.jpg"); $white = imageColorClosest($im, 255,255,255); // this is for TTF fonts imagettftext ($im, 20, 0, 16, 30, $white, "/usr/X11R6/lib/X11/fonts/TTF/luximb.ttf", "Vikrant"); //this is for notmal font imagestring($im, 4, 0,0,"Korde", $white); imagejpeg($im,"",150); imagedestroy ($im); magicaltux
A way to get each time an answer : <?php function imagegetcolor($im, $r, $g, $b) { $c=imagecolorexact($im, $r, $g, $b); if ($c!=-1) return $c; $c=imagecolorallocate($im, $r, $g, $b); if ($c!=-1) return $c; return imagecolorclosest($im, $r, $g, $b); } ?> If the *exact* color is found in the image, it will be returned. If we don't have the exact color, we try to allocate it. If we can't allocate it, we return the closest color in the image. |
Change Language
gd_info getimagesize image_type_to_extension image_type_to_mime_type image2wbmp imagealphablending imageantialias imagearc imagechar imagecharup imagecolorallocate imagecolorallocatealpha imagecolorat imagecolorclosest imagecolorclosestalpha imagecolorclosesthwb imagecolordeallocate imagecolorexact imagecolorexactalpha imagecolormatch imagecolorresolve imagecolorresolvealpha imagecolorset imagecolorsforindex imagecolorstotal imagecolortransparent imageconvolution imagecopy imagecopymerge imagecopymergegray imagecopyresampled imagecopyresized imagecreate imagecreatefromgd2 imagecreatefromgd2part imagecreatefromgd imagecreatefromgif imagecreatefromjpeg imagecreatefrompng imagecreatefromstring imagecreatefromwbmp imagecreatefromxbm imagecreatefromxpm imagecreatetruecolor imagedashedline imagedestroy imageellipse imagefill imagefilledarc imagefilledellipse imagefilledpolygon imagefilledrectangle imagefilltoborder imagefilter imagefontheight imagefontwidth imageftbbox imagefttext imagegammacorrect imagegd2 imagegd imagegif imagegrabscreen imagegrabwindow imageinterlace imageistruecolor imagejpeg imagelayereffect imageline imageloadfont imagepalettecopy imagepng imagepolygon imagepsbbox imagepsencodefont imagepsextendfont imagepsfreefont imagepsloadfont imagepsslantfont imagepstext imagerectangle imagerotate imagesavealpha imagesetbrush imagesetpixel imagesetstyle imagesetthickness imagesettile imagestring imagestringup imagesx imagesy imagetruecolortopalette imagettfbbox imagettftext imagetypes imagewbmp imagexbm iptcembed iptcparse jpeg2wbmp png2wbmp |
