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<?php
namespace PhpOffice\PhpSpreadsheet\Shared;
use GdImage;
use PhpOffice\PhpSpreadsheet\Reader\Exception as ReaderException;
use SimpleXMLElement;
class Drawing
{
/**
* Convert pixels to EMU.
*
* @param int $pixelValue Value in pixels
*
* @return int Value in EMU
*/
public static function pixelsToEMU($pixelValue)
{
return $pixelValue * 9525;
}
/**
* Convert EMU to pixels.
*
* @param int|SimpleXMLElement $emuValue Value in EMU
*
* @return int Value in pixels
*/
public static function EMUToPixels($emuValue)
{
$emuValue = (int) $emuValue;
if ($emuValue != 0) {
return (int) round($emuValue / 9525);
}
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 $pixelValue Value in pixels
*
* @return float|int Value in cell dimension
*/
public static function pixelsToCellDimension($pixelValue, \PhpOffice\PhpSpreadsheet\Style\Font $defaultFont)
{
// Font name and size
$name = $defaultFont->getName();
$size = $defaultFont->getSize();
if (isset(Font::$defaultColumnWidths[$name][$size])) {
// Exact width can be determined
return $pixelValue * Font::$defaultColumnWidths[$name][$size]['width']
/ Font::$defaultColumnWidths[$name][$size]['px'];
}
// We don't have data for this particular font and size, use approximation by
// extrapolating from Calibri 11
return $pixelValue * 11 * Font::$defaultColumnWidths['Calibri'][11]['width']
/ Font::$defaultColumnWidths['Calibri'][11]['px'] / $size;
}
/**
* Convert column width from (intrinsic) Excel units to pixels.
*
* @param float $cellWidth Value in cell dimension
* @param \PhpOffice\PhpSpreadsheet\Style\Font $defaultFont Default font of the workbook
*
* @return int Value in pixels
*/
public static function cellDimensionToPixels($cellWidth, \PhpOffice\PhpSpreadsheet\Style\Font $defaultFont)
{
// Font name and size
$name = $defaultFont->getName();
$size = $defaultFont->getSize();
if (isset(Font::$defaultColumnWidths[$name][$size])) {
// Exact width can be determined
$colWidth = $cellWidth * Font::$defaultColumnWidths[$name][$size]['px']
/ 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 = $cellWidth * $size * Font::$defaultColumnWidths['Calibri'][11]['px']
/ Font::$defaultColumnWidths['Calibri'][11]['width'] / 11;
}
// Round pixels to closest integer
$colWidth = (int) round($colWidth);
return $colWidth;
}
/**
* Convert pixels to points.
*
* @param int $pixelValue Value in pixels
*
* @return float Value in points
*/
public static function pixelsToPoints($pixelValue)
{
return $pixelValue * 0.75;
}
/**
* Convert points to pixels.
*
* @param int $pointValue Value in points
*
* @return int Value in pixels
*/
public static function pointsToPixels($pointValue)
{
if ($pointValue != 0) {
return (int) ceil($pointValue / 0.75);
}
return 0;
}
/**
* Convert degrees to angle.
*
* @param int $degrees Degrees
*
* @return int Angle
*/
public static function degreesToAngle($degrees)
{
return (int) round($degrees * 60000);
}
/**
* Convert angle to degrees.
*
* @param int|SimpleXMLElement $angle Angle
*
* @return int Degrees
*/
public static function angleToDegrees($angle)
{
$angle = (int) $angle;
if ($angle != 0) {
return (int) round($angle / 60000);
}
return 0;
}
/**
* Create a new image from file. By alexander at alexauto dot nl.
*
* @see http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
*
* @param string $bmpFilename Path to Windows DIB (BMP) image
*
* @return GdImage|resource
*
* @deprecated 1.26 use Php function imagecreatefrombmp instead
*
* @codeCoverageIgnore
*/
public static function imagecreatefrombmp($bmpFilename)
{
$retVal = @imagecreatefrombmp($bmpFilename);
if ($retVal === false) {
throw new ReaderException("Unable to create image from $bmpFilename");
}
return $retVal;
}
}
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