<?PHP
/*
@ file:pullImageEx.php
@ explain : draw text on picture
@ author : 左鹞飞 zuo_yfATyahoo.com
@ create time: 2005/02/16
*/
class pullImageEx{
var $font_size=3;
var $origin_file_path="";
var $dest_file_path="";
var $text="testing";
var $text_color="FFFFFF";
var $bg_color="000000";
var $textlines=1;
var $line_space=4;
var $bg_rectangle_width=120;
var $bg_rectangle_height=80;
var $Opacity=50;
function pullImageEx()
{
}
function setBgRectangle($w=120,$h=80){$this->bg_rectangle_width=$w;$this->bg_rectangle_height=$h;}
function setOriginFilePath($fp=""){$this->origin_file_path=$fp;}
function setDestFilePath($fp=""){$this->dest_file_path=$fp;}
function setText($txt="testing"){$this->text=$txt;}
function setLineSpace($ls=4){$this->line_space=$ls;}
function setTextFontSize($fs=1){$this->font_size=$fs;}
function setTextColor($tc="FFFFFF"){$this->text_color=$tc;}
function setRectangleBgColor($bc="000000"){$this->bg_color=$bc;}
function setOpacity($opacities=50){$this->Opacity=$opacities;}
function colordecode($hex){
$code[r] = hexdec(substr($hex, 0 ,2));
$code[g] = hexdec(substr($hex, 2 ,2));
$code[b] = hexdec(substr($hex, 4 ,2));
return $code;
}
function drawText()
{
$im=$this->createOverlayPic($this->bg_rectangle_width,$this->bg_rectangle_height,$this->bg_color,$this->text_color,$this->font_size,$this->text,$this->line_space);
$this->mergePix($this->origin_file_path,$im,$this->dest_file_path,0,$this->Opacity);
}
function preProcessText($text)
{
}
function createOverlayPic($pic_width,$pic_height,$pic_bg_color,$txt_color,$txt_font_size,$text,$line_space)
{
$im = @imagecreate ($pic_width, $pic_height) or die ("Cannot Initialize new GD image stream");
//set backgroud canvas
$bg_color=$this->colordecode($pic_bg_color);
$background_color = imagecolorallocate ($im, $bg_color[r], $bg_color[g], $bg_color[b]);
@imagefilledrectangle ($im, 0, 0, $pic_width, $pic_height, $background_color);
$t_color=$this->colordecode($txt_color);
$text_color = imagecolorallocate ($im, $t_color[r], $t_color[g], $t_color[b]);
//get font pix size
$text_ary=explode("\r\n",$text);
$lines=sizeof($text_ary);
$val_span=ImageFontHeight($txt_font_size) + $line_space;
$text_height=$lines*$val_span;
$init_height=($pic_height/2)-($text_height/2);
for($i=0;$i<$lines;$i++)
{
$c_width = ImageFontWidth($txt_font_size) * strlen($text_ary[$i]);
$dest_x = ( $pic_width / 2 ) - ( $c_width / 2 );
$dest_y = $init_height + $val_span*$i;
imagestring ($im, $txt_font_size, $dest_x, $dest_y, $text_ary[$i], $text_color);
}
//imagepng ($im);
return $im;
}
function mergePix($canvas_png,$overlay_img, $targetfile, $pos=0,$Opacity=50)
{
//Get the resource handle of the pictures
//$overlay_img = imageCreateFromPng($overlay_png);
$canvas_img = imageCreateFromPNG($canvas_png);
//Get the sizes of both pix
$canvas_png_width=imageSX($canvas_img);
$canvas_png_height=imageSY($canvas_img);
$overlay_png_width=imageSX($overlay_img);
$overlay_png_height=imageSY($overlay_img);
//middle
if( $pos == 0 )
{
$dest_x = ( $canvas_png_width / 2 ) - ( $overlay_png_width / 2 );
$dest_y = ( $canvas_png_height / 2 ) - ( $overlay_png_height / 2 );
}
//top left
if( $pos == 1 )
{
$dest_x = 0;
$dest_y = 0;
}
//top right
if( $pos == 2 )
{
$dest_x = $canvas_png_width - $overlay_png_width;
$dest_y = 0;
}
//bottom right
if( $pos == 3 )
{
$dest_x = $canvas_png_width - $overlay_png_width;
$dest_y = $canvas_png_height - $overlay_png_height;
}
//bottom left
if( $pos == 4 )
{
$dest_x = 0;
$dest_y = $canvas_png_height - $overlay_png_height;
}
//top middle
if( $pos == 5 )
{
$dest_x = ( ( $canvas_png_width - $overlay_png_width ) / 2 );
$dest_y = 0;
}
//middle right
if( $pos == 6 )
{
$dest_x = $canvas_png_width - $overlay_png_width;
$dest_y = ( $canvas_png_height / 2 ) - ( $overlay_png_height / 2 );
}
//bottom middle
if( $pos == 7 )
{
$dest_x = ( ( $canvas_png_width - $overlay_png_width ) / 2 );
$dest_y = $canvas_png_height - $overlay_png_height;
}
//middle left
if( $pos == 8 )
{
$dest_x = 0;
$dest_y = ( $canvas_png_height / 2 ) - ( $overlay_png_height / 2 );
}
//The main thing : merge the two pix
imageCopyMerge($canvas_img, $overlay_img,$dest_x,$dest_y,0,0,$overlay_png_width,$overlay_png_height,$Opacity);
//Create a png out of the modified picture
imagepng ($canvas_img,"$targetfile");
imagedestroy($overlay_img);
imagedestroy($canvas_img);
}
}
?>
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