diff options
Diffstat (limited to 'lib/imagefile.php')
| -rw-r--r-- | lib/imagefile.php | 146 |
1 files changed, 135 insertions, 11 deletions
diff --git a/lib/imagefile.php b/lib/imagefile.php index 6bc8e599b..e47287741 100644 --- a/lib/imagefile.php +++ b/lib/imagefile.php @@ -60,6 +60,19 @@ class ImageFile $this->filepath = $filepath; $info = @getimagesize($this->filepath); + + if (!( + ($info[2] == IMAGETYPE_GIF && function_exists('imagecreatefromgif')) || + ($info[2] == IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) || + $info[2] == IMAGETYPE_BMP || + ($info[2] == IMAGETYPE_WBMP && function_exists('imagecreatefromwbmp')) || + ($info[2] == IMAGETYPE_XBM && function_exists('imagecreatefromxbm')) || + ($info[2] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')))) { + + throw new Exception(_('Unsupported image file format.')); + return; + } + $this->type = ($info) ? $info[2]:$type; $this->width = ($info) ? $info[0]:$width; $this->height = ($info) ? $info[1]:$height; @@ -97,15 +110,6 @@ class ImageFile return; } - if ($info[2] !== IMAGETYPE_GIF && - $info[2] !== IMAGETYPE_JPEG && - $info[2] !== IMAGETYPE_PNG) { - - @unlink($_FILES[$param]['tmp_name']); - throw new Exception(_('Unsupported image file format.')); - return; - } - return new ImageFile(null, $_FILES[$param]['tmp_name']); } @@ -146,6 +150,15 @@ 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; default: throw new Exception(_('Unknown file type')); return; @@ -153,7 +166,7 @@ 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 +189,20 @@ 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; + } + $outname = Avatar::filename($this->id, image_type_to_extension($this->type), $size, @@ -245,4 +272,101 @@ 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; + } +} |