271 lines
8.8 KiB
PHP
271 lines
8.8 KiB
PHP
<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2015 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version ##VERSION##, ##DATE##
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*/
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/**
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* PHPExcel_Shared_Drawing
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_Shared_Drawing
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{
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/**
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* Convert pixels to EMU
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*
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* @param int $pValue Value in pixels
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* @return int Value in EMU
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*/
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public static function pixelsToEMU($pValue = 0)
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{
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return round($pValue * 9525);
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}
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/**
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* Convert EMU to pixels
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*
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* @param int $pValue Value in EMU
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* @return int Value in pixels
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*/
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public static function EMUToPixels($pValue = 0)
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{
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if ($pValue != 0) {
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return round($pValue / 9525);
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} else {
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return 0;
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}
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}
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/**
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* Convert pixels to column width. Exact algorithm not known.
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* By inspection of a real Excel file using Calibri 11, one finds 1000px ~ 142.85546875
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* This gives a conversion factor of 7. Also, we assume that pixels and font size are proportional.
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*
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* @param int $pValue Value in pixels
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* @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook
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* @return int Value in cell dimension
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*/
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public static function pixelsToCellDimension($pValue = 0, PHPExcel_Style_Font $pDefaultFont)
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{
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// Font name and size
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$name = $pDefaultFont->getName();
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$size = $pDefaultFont->getSize();
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if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) {
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// Exact width can be determined
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$colWidth = $pValue * PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width'] / PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px'];
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} else {
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// We don't have data for this particular font and size, use approximation by
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// extrapolating from Calibri 11
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$colWidth = $pValue * 11 * PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width'] / PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px'] / $size;
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}
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return $colWidth;
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}
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/**
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* Convert column width from (intrinsic) Excel units to pixels
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*
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* @param float $pValue Value in cell dimension
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* @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook
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* @return int Value in pixels
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*/
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public static function cellDimensionToPixels($pValue = 0, PHPExcel_Style_Font $pDefaultFont)
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{
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// Font name and size
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$name = $pDefaultFont->getName();
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$size = $pDefaultFont->getSize();
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if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) {
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// Exact width can be determined
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$colWidth = $pValue * PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px'] / PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width'];
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} else {
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// We don't have data for this particular font and size, use approximation by
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// extrapolating from Calibri 11
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$colWidth = $pValue * $size * PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px'] / PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width'] / 11;
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}
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// Round pixels to closest integer
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$colWidth = (int) round($colWidth);
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return $colWidth;
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}
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/**
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* Convert pixels to points
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*
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* @param int $pValue Value in pixels
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* @return int Value in points
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*/
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public static function pixelsToPoints($pValue = 0)
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{
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return $pValue * 0.67777777;
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}
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/**
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* Convert points to pixels
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*
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* @param int $pValue Value in points
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* @return int Value in pixels
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*/
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public static function pointsToPixels($pValue = 0)
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{
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if ($pValue != 0) {
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return (int) ceil($pValue * 1.333333333);
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} else {
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return 0;
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}
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}
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/**
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* Convert degrees to angle
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*
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* @param int $pValue Degrees
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* @return int Angle
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*/
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public static function degreesToAngle($pValue = 0)
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{
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return (int)round($pValue * 60000);
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}
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/**
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* Convert angle to degrees
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*
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* @param int $pValue Angle
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* @return int Degrees
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*/
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public static function angleToDegrees($pValue = 0)
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{
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if ($pValue != 0) {
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return round($pValue / 60000);
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} else {
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return 0;
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}
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}
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/**
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* Create a new image from file. By alexander at alexauto dot nl
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*
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* @link http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
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* @param string $filename Path to Windows DIB (BMP) image
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* @return resource
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*/
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public static function imagecreatefrombmp($p_sFile)
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{
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// Load the image into a string
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$file = fopen($p_sFile, "rb");
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$read = fread($file, 10);
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while (!feof($file) && ($read<>"")) {
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$read .= fread($file, 1024);
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}
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$temp = unpack("H*", $read);
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$hex = $temp[1];
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$header = substr($hex, 0, 108);
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// Process the header
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// Structure: http://www.fastgraph.com/help/bmp_header_format.html
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if (substr($header, 0, 4)=="424d") {
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// Cut it in parts of 2 bytes
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$header_parts = str_split($header, 2);
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// Get the width 4 bytes
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$width = hexdec($header_parts[19].$header_parts[18]);
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// Get the height 4 bytes
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$height = hexdec($header_parts[23].$header_parts[22]);
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// Unset the header params
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unset($header_parts);
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}
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// Define starting X and Y
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$x = 0;
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$y = 1;
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// Create newimage
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$image = imagecreatetruecolor($width, $height);
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// Grab the body from the image
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$body = substr($hex, 108);
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// Calculate if padding at the end-line is needed
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// Divided by two to keep overview.
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// 1 byte = 2 HEX-chars
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$body_size = (strlen($body)/2);
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$header_size = ($width*$height);
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// Use end-line padding? Only when needed
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$usePadding = ($body_size>($header_size*3)+4);
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// Using a for-loop with index-calculation instaid of str_split to avoid large memory consumption
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// Calculate the next DWORD-position in the body
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for ($i = 0; $i < $body_size; $i += 3) {
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// Calculate line-ending and padding
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if ($x >= $width) {
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// If padding needed, ignore image-padding
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// Shift i to the ending of the current 32-bit-block
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if ($usePadding) {
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$i += $width%4;
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}
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// Reset horizontal position
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$x = 0;
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// Raise the height-position (bottom-up)
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$y++;
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// Reached the image-height? Break the for-loop
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if ($y > $height) {
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break;
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}
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}
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// Calculation of the RGB-pixel (defined as BGR in image-data)
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// Define $i_pos as absolute position in the body
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$i_pos = $i * 2;
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$r = hexdec($body[$i_pos+4].$body[$i_pos+5]);
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$g = hexdec($body[$i_pos+2].$body[$i_pos+3]);
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$b = hexdec($body[$i_pos].$body[$i_pos+1]);
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// Calculate and draw the pixel
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$color = imagecolorallocate($image, $r, $g, $b);
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imagesetpixel($image, $x, $height-$y, $color);
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// Raise the horizontal position
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$x++;
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}
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// Unset the body / free the memory
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unset($body);
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// Return image-object
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return $image;
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}
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}
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