PHPExcel_Shared

# Source for file Drawing.php Documentation is available at Drawing.php <?php /** * PHPExcel * * Copyright (c) 2006 - 2011 PHPExcel * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * @category PHPExcel * @package PHPExcel_Shared * @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL * @version 1.7.6, 2011-02-27 */ /** * PHPExcel_Shared_Drawing * * @category PHPExcel * @package PHPExcel_Shared * @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel) */ class PHPExcel_Shared_Drawing { /** * Convert pixels to EMU * * @param int $pValue Value in pixels * @return int Value in EMU */ public static function pixelsToEMU($pValue = 0) { return round($pValue * 9525); } /** * Convert EMU to pixels * * @param int $pValue Value in EMU * @return int Value in pixels */ public static function EMUToPixels($pValue = 0) { if ($pValue != 0) { return round($pValue / 9525); } else { return 0; } } /** * Convert pixels to column width. Exact algorithm not known. * By inspection of a real Excel file using Calibri 11, one finds 1000px ~ 142.85546875 * This gives a conversion factor of 7. Also, we assume that pixels and font size are proportional. * * @param int $pValue Value in pixels * @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook * @return int Value in cell dimension */ public static function pixelsToCellDimension($pValue = 0, PHPExcel_Style_Font $pDefaultFont) { // Font name and size $name = $pDefaultFont->getName(); $size = $pDefaultFont->getSize(); if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) { // Exact width can be determined $colWidth = $pValue * PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width'] / PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px']; } else { // We don't have data for this particular font and size, use approximation by // extrapolating from Calibri 11 $colWidth = $pValue * 11 * PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width'] / PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px'] / $size; } return $colWidth; } /** * Convert column width from (intrinsic) Excel units to pixels * * @param float $pValue Value in cell dimension * @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook * @return int Value in pixels */ public static function cellDimensionToPixels($pValue = 0, PHPExcel_Style_Font $pDefaultFont) { // Font name and size $name = $pDefaultFont->getName(); $size = $pDefaultFont->getSize(); if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) { // Exact width can be determined $colWidth = $pValue * PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px'] / PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width']; } else { // We don't have data for this particular font and size, use approximation by // extrapolating from Calibri 11 $colWidth = $pValue * $size * PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px'] / PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width'] / 11; } // Round pixels to closest integer $colWidth = (int) round($colWidth); return $colWidth; } /** * Convert pixels to points * * @param int $pValue Value in pixels * @return int Value in points */ public static function pixelsToPoints($pValue = 0) { return $pValue * 0.67777777; } /** * Convert points to pixels * * @param int $pValue Value in points * @return int Value in pixels */ public static function pointsToPixels($pValue = 0) { if ($pValue != 0) { return (int) ceil($pValue * 1.333333333); } else { return 0; } } /** * Convert degrees to angle * * @param int $pValue Degrees * @return int Angle */ public static function degreesToAngle($pValue = 0) { return (int)round($pValue * 60000); } /** * Convert angle to degrees * * @param int $pValue Angle * @return int Degrees */ public static function angleToDegrees($pValue = 0) { if ($pValue != 0) { return round($pValue / 60000); } else { return 0; } } /** * Create a new image from file. By alexander at alexauto dot nl * * @link http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214 * @param string $filename Path to Windows DIB (BMP) image * @return resource */ public static function imagecreatefrombmp($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; } } Documentation generated on Sun, 27 Feb 2011 16:30:19 -0800 by phpDocumentor 1.4.3