add image support for xbm, xpm, wbmp, and bmp image formats

diff --git a/lib/imagefile.php b/lib/imagefile.php
index 6bc8e599b3022f7aa29d9c80045157989f627293..7b047945528ec4dffa331b09849b9f2db82663fd 100644 (file)
--- a/lib/imagefile.php
+++ b/lib/imagefile.php
@@ -99,6 +99,10 @@ class ImageFile
 
         if ($info[2] !== IMAGETYPE_GIF &&
             $info[2] !== IMAGETYPE_JPEG &&
+            $info[2] !== IMAGETYPE_BMP &&
+            $info[2] !== IMAGETYPE_WBMP &&
+            $info[2] !== IMAGETYPE_XBM &&
+            $info[2] !== IMAGETYPE_XPM &&
             $info[2] !== IMAGETYPE_PNG) {
 
             @unlink($_FILES[$param]['tmp_name']);
@@ -146,6 +150,18 @@ class ImageFile
          case IMAGETYPE_PNG:
             $image_src = imagecreatefrompng($this->filepath);
             break;
+         case IMAGETYPE_BMP:
+            $image_src = imagecreatefrombmp($this->filepath);
+            break;
+         case IMAGETYPE_WBMP:
+            $image_src = imagecreatefromwbmp($this->filepath);
+            break;
+         case IMAGETYPE_XBM:
+            $image_src = imagecreatefromxbm($this->filepath);
+            break;
+         case IMAGETYPE_XPM:
+            $image_src = imagecreatefromxpm($this->filepath);
+            break;
          default:
             throw new Exception(_('Unknown file type'));
             return;
@@ -153,7 +169,7 @@ class ImageFile
 
         $image_dest = imagecreatetruecolor($size, $size);
 
-        if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG) {
+        if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG || $this->type == IMAGETYPE_BMP) {
 
             $transparent_idx = imagecolortransparent($image_src);
 
@@ -176,6 +192,24 @@ class ImageFile
 
         imagecopyresampled($image_dest, $image_src, 0, 0, $x, $y, $size, $size, $w, $h);
 
+        if($this->type == IMAGETYPE_BMP) {
+            //we don't want to save BMP... it's an inefficient, rare, antiquated format
+            //save png instead
+            $this->type = IMAGETYPE_PNG;
+        } else if($this->type == IMAGETYPE_WBMP) {
+            //we don't want to save WBMP... it's a rare format that we can't guarantee clients will support
+            //save png instead
+            $this->type = IMAGETYPE_PNG;
+        } else if($this->type == IMAGETYPE_XBM) {
+            //we don't want to save XBM... it's a rare format that we can't guarantee clients will support
+            //save png instead
+            $this->type = IMAGETYPE_PNG;
+        } else if($this->type == IMAGETYPE_XPM) {
+            //we don't want to save XPM... it's a rare format that we can't guarantee clients will support
+            //save png instead
+            $this->type = IMAGETYPE_PNG;
+        }
+
         $outname = Avatar::filename($this->id,
                                     image_type_to_extension($this->type),
                                     $size,
@@ -245,4 +279,101 @@ class ImageFile
 
         return $num;
     }
-}
\ No newline at end of file
+}
+
+//PHP doesn't (as of 2/24/2010) have an imagecreatefrombmp so conditionally define one
+if(!function_exists('imagecreatefrombmp')){
+    //taken shamelessly from http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
+    function imagecreatefrombmp($p_sFile)
+    {
+        //    Load the image into a string
+        $file    =    fopen($p_sFile,"rb");
+        $read    =    fread($file,10);
+        while(!feof($file)&&($read<>""))
+            $read    .=    fread($file,1024);
+
+        $temp    =    unpack("H*",$read);
+        $hex    =    $temp[1];
+        $header    =    substr($hex,0,108);
+
+        //    Process the header
+        //    Structure: http://www.fastgraph.com/help/bmp_header_format.html
+        if (substr($header,0,4)=="424d")
+        {
+            //    Cut it in parts of 2 bytes
+            $header_parts    =    str_split($header,2);
+
+            //    Get the width        4 bytes
+            $width            =    hexdec($header_parts[19].$header_parts[18]);
+
+            //    Get the height        4 bytes
+            $height            =    hexdec($header_parts[23].$header_parts[22]);
+
+            //    Unset the header params
+            unset($header_parts);
+        }
+
+        //    Define starting X and Y
+        $x                =    0;
+        $y                =    1;
+
+        //    Create newimage
+        $image            =    imagecreatetruecolor($width,$height);
+
+        //    Grab the body from the image
+        $body            =    substr($hex,108);
+
+        //    Calculate if padding at the end-line is needed
+        //    Divided by two to keep overview.
+        //    1 byte = 2 HEX-chars
+        $body_size        =    (strlen($body)/2);
+        $header_size    =    ($width*$height);
+
+        //    Use end-line padding? Only when needed
+        $usePadding        =    ($body_size>($header_size*3)+4);
+
+        //    Using a for-loop with index-calculation instaid of str_split to avoid large memory consumption
+        //    Calculate the next DWORD-position in the body
+        for ($i=0;$i<$body_size;$i+=3)
+        {
+            //    Calculate line-ending and padding
+            if ($x>=$width)
+            {
+                //    If padding needed, ignore image-padding
+                //    Shift i to the ending of the current 32-bit-block
+                if ($usePadding)
+                    $i    +=    $width%4;
+
+                //    Reset horizontal position
+                $x    =    0;
+
+                //    Raise the height-position (bottom-up)
+                $y++;
+
+                //    Reached the image-height? Break the for-loop
+                if ($y>$height)
+                    break;
+            }
+
+            //    Calculation of the RGB-pixel (defined as BGR in image-data)
+            //    Define $i_pos as absolute position in the body
+            $i_pos    =    $i*2;
+            $r        =    hexdec($body[$i_pos+4].$body[$i_pos+5]);
+            $g        =    hexdec($body[$i_pos+2].$body[$i_pos+3]);
+            $b        =    hexdec($body[$i_pos].$body[$i_pos+1]);
+
+            //    Calculate and draw the pixel
+            $color    =    imagecolorallocate($image,$r,$g,$b);
+            imagesetpixel($image,$x,$height-$y,$color);
+
+            //    Raise the horizontal position
+            $x++;
+        }
+
+        //    Unset the body / free the memory
+        unset($body);
+
+        //    Return image-object
+        return $image;
+    }
+}