Adapter/Common.php
protected function _trimColor($background = 'transparent')
    {
        $width = $this->width();
        $height = $this->height();

        $b_top = 0;
        $b_lft = 0;
        $b_btm = $height - 1;
        $b_rt = $width - 1;

        //top
        for (; $b_top < $height; ++$b_top) {
            for ($x = 0; $x < $width; ++$x) {
                if ($this->getColor($x, $b_top) != $background) {
                    break 2;
                }
            }
        }

        // bottom
        for (; $b_btm >= 0; --$b_btm) {
            for ($x = 0; $x < $width; ++$x) {
                if ($this->getColor($x, $b_btm) != $background) {
                    break 2;
                }
            }
        }

        // left
        for (; $b_lft < $width; ++$b_lft) {
            for ($y = $b_top; $y <= $b_btm; ++$y) {
                if ($this->getColor($b_lft, $y) != $background) {
                    break 2;
                }
            }
        }

        // right
        for (; $b_rt >= 0; --$b_rt) {
            for ($y = $b_top; $y <= $b_btm; ++$y) {
                if ($this->getColor($b_rt, $y) != $background) {
                    break 2;
                }
            }
        }

        ++$b_btm;
        ++$b_rt;

        $this->crop($b_lft, $b_top, $b_rt - $b_lft, $b_btm - $b_top);
    }
protected function _trimColor($background = 'transparent')
    {
        $width = $this->width();
        $height = $this->height();

        $b_top = 0;
        $b_lft = 0;
        $b_btm = $height - 1;
        $b_rt = $width - 1;

        //top
        for (; $b_top < $height; ++$b_top) {
            for ($x = 0; $x < $width; ++$x) {
                if ($this->getColor($x, $b_top) != $background) {
                    break 2;
                }
            }
        }

        // bottom
        for (; $b_btm >= 0; --$b_btm) {
            for ($x = 0; $x < $width; ++$x) {
                if ($this->getColor($x, $b_btm) != $background) {
                    break 2;
                }
            }
        }

        // left
        for (; $b_lft < $width; ++$b_lft) {
            for ($y = $b_top; $y <= $b_btm; ++$y) {
                if ($this->getColor($b_lft, $y) != $background) {
                    break 2;
                }
            }
        }

        // right
        for (; $b_rt >= 0; --$b_rt) {
            for ($y = $b_top; $y <= $b_btm; ++$y) {
                if ($this->getColor($b_rt, $y) != $background) {
                    break 2;
                }
            }
        }

        ++$b_btm;
        ++$b_rt;

        $this->crop($b_lft, $b_top, $b_rt - $b_lft, $b_btm - $b_top);
    }
protected function _trimColor ( $ background = 'transparent' ) { $ width = $ this -> width ( ) ; $ height = $ this -> height ( ) ; $ b_top = 0 ; $ b_lft = 0 ; $ b_btm = $ height - 1 ; $ b_rt = $ width - 1 ; //top for ( ; $ b_top < $ height ; ++ $ b_top ) { for ( $ x = 0 ; $ x < $ width ; ++ $ x ) { if ( $ this -> getColor ( $ x , $ b_top ) != $ background ) { break 2 ; } } } // bottom for ( ; $ b_btm >= 0 ; -- $ b_btm ) { for ( $ x = 0 ; $ x < $ width ; ++ $ x ) { if ( $ this -> getColor ( $ x , $ b_btm ) != $ background ) { break 2 ; } } } // left for ( ; $ b_lft < $ width ; ++ $ b_lft ) { for ( $ y = $ b_top ; $ y <= $ b_btm ; ++ $ y ) { if ( $ this -> getColor ( $ b_lft , $ y ) != $ background ) { break 2 ; } } } // right for ( ; $ b_rt >= 0 ; -- $ b_rt ) { for ( $ y = $ b_top ; $ y <= $ b_btm ; ++ $ y ) { if ( $ this -> getColor ( $ b_rt , $ y ) != $ background ) { break 2 ; } } } ++ $ b_btm ; ++ $ b_rt ; $ this -> crop ( $ b_lft , $ b_top , $ b_rt - $ b_lft , $ b_btm - $ b_top ) ; }
Trim background color arround the image.

@param int $bg the background
Trim background color arround the image .