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<?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;
}
}
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