note 20742 added to function.imagecopyresampled

The post with the bicubic transform was very helpful - however it also suffers from ignoring the src_x and src_y parameters - the following script is a modified version that takes them into account. I also commented out the color allocation (because I'm working with truecolor images) function ImageCopyResampleBicubic ($dst_img, $src_img, $dst_x, $dst_y,$src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) { /* for ($i = 0; $i < imagecolorstotal($src_img); $i++) { $colors = ImageColorsForIndex ($src_img, $i); ImageColorAllocate ($dst_img, $colors['red'],$colors['green'], $colors['blue']); } */ $scaleX = ($src_w - 1) / $dst_w; $scaleY = ($src_h - 1) / $dst_h; $scaleX2 = $scaleX / 2.0; $scaleY2 = $scaleY / 2.0; for ($j = $src_y; $j < $src_y + $dst_h; $j++) { $sY = $j * $scaleY; for ($i = $src_x; $i < $src_x + $dst_w; $i++) { $sX = $i * $scaleX; $c1 = ImageColorsForIndex ($src_img, ImageColorAt($src_img, (int) $sX, (int) $sY + $scaleY2)); $c2 = ImageColorsForIndex ($src_img, ImageColorAt($src_img, (int) $sX, (int) $sY)); $c3 = ImageColorsForIndex ($src_img, ImageColorAt($src_img, (int) $sX + $scaleX2, (int) $sY + $scaleY2)); $c4 = ImageColorsForIndex ($src_img, ImageColorAt($src_img, (int) $sX + $scaleX2, (int) $sY)); $red = (int) (($c1['red'] + $c2['red'] + $c3['red'] + $c4['red']) / 4); $green = (int) (($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) / 4); $blue = (int) (($c1['blue'] + $c2['blue'] + $c3['blue'] + $c4['blue']) / 4); $color = ImageColorClosest ($dst_img, $red, $green,$blue); ImageSetPixel ($dst_img, $dst_x + $i - $src_x, $dst_y + $j - $src_y,$color); } } } -- http://www.php.net/manual/en/function.imagecopyresampled.php http://master.php.net/manage/user-notes.php?action=edit+20742 http://master.php.net/manage/user-notes.php?action=delete+20742 http://master.php.net/manage/user-notes.php?action=reject+20742