Viewing file:  Wmf.php (7.09 KB) -rw-r--r--
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<?php
namespace Mpdf\Image;
use Mpdf\Color\ColorConverter;
use Mpdf\Mpdf;
class Wmf
{
/**
* @var \Mpdf\Mpdf
*/
private $mpdf;
/**
* @var \Mpdf\Color\ColorConverter
*/
private $colorConverter;
/**
* @var array
*/
private $gdiObjectArray;
public function __construct(Mpdf $mpdf, ColorConverter $colorConverter)
{
$this->mpdf = $mpdf;
$this->colorConverter = $colorConverter;
}
function _getWMFimage($data)
{
$k = Mpdf::SCALE;
$this->gdiObjectArray = [];
$a = unpack('stest', "\1\0");
if ($a['test'] != 1) {
return [0, 'Error parsing WMF image - Big-endian architecture not supported'];
}
// check for Aldus placeable metafile header
$key = unpack('Lmagic', substr($data, 0, 4));
$p = 18; // WMF header
if ($key['magic'] == (int) 0x9AC6CDD7) {
$p +=22;
} // Aldus header
// define some state variables
$wo = null; // window origin
$we = null; // window extent
$polyFillMode = 0;
$nullPen = false;
$nullBrush = false;
$endRecord = false;
$wmfdata = '';
while ($p < strlen($data) && !$endRecord) {
$recordInfo = unpack('Lsize/Sfunc', substr($data, $p, 6));
$p += 6;
// size of record given in WORDs (= 2 bytes)
$size = $recordInfo['size'];
// func is number of GDI function
$func = $recordInfo['func'];
if ($size > 3) {
$parms = substr($data, $p, 2 * ($size - 3));
$p += 2 * ($size - 3);
}
switch ($func) {
case 0x020b: // SetWindowOrg
// do not allow window origin to be changed
// after drawing has begun
if (!$wmfdata) {
$wo = array_reverse(unpack('s2', $parms));
}
break;
case 0x020c: // SetWindowExt
// do not allow window extent to be changed
// after drawing has begun
if (!$wmfdata) {
$we = array_reverse(unpack('s2', $parms));
}
break;
case 0x02fc: // CreateBrushIndirect
$brush = unpack('sstyle/Cr/Cg/Cb/Ca/Shatch', $parms);
$brush['type'] = 'B';
$this->_AddGDIObject($brush);
break;
case 0x02fa: // CreatePenIndirect
$pen = unpack('Sstyle/swidth/sdummy/Cr/Cg/Cb/Ca', $parms);
// convert width from twips to user unit
$pen['width'] /= (20 * $k);
$pen['type'] = 'P';
$this->_AddGDIObject($pen);
break;
// MUST create other GDI objects even if we don't handle them
case 0x06fe: // CreateBitmap
case 0x02fd: // CreateBitmapIndirect
case 0x00f8: // CreateBrush
case 0x02fb: // CreateFontIndirect
case 0x00f7: // CreatePalette
case 0x01f9: // CreatePatternBrush
case 0x06ff: // CreateRegion
case 0x0142: // DibCreatePatternBrush
$dummyObject = ['type' => 'D'];
$this->_AddGDIObject($dummyObject);
break;
case 0x0106: // SetPolyFillMode
$polyFillMode = unpack('smode', $parms);
$polyFillMode = $polyFillMode['mode'];
break;
case 0x01f0: // DeleteObject
$idx = unpack('Sidx', $parms);
$idx = $idx['idx'];
$this->_DeleteGDIObject($idx);
break;
case 0x012d: // SelectObject
$idx = unpack('Sidx', $parms);
$idx = $idx['idx'];
$obj = $this->_GetGDIObject($idx);
switch ($obj['type']) {
case 'B':
$nullBrush = false;
if ($obj['style'] == 1) {
$nullBrush = true;
} else {
$wmfdata .= $this->mpdf->SetFColor($this->colorConverter->convert('rgb(' . $obj['r'] . ',' . $obj['g'] . ',' . $obj['b'] . ')', $this->mpdf->PDFAXwarnings), true) . "\n";
}
break;
case 'P':
$nullPen = false;
$dashArray = [];
// dash parameters are custom
switch ($obj['style']) {
case 0: // PS_SOLID
break;
case 1: // PS_DASH
$dashArray = [3, 1];
break;
case 2: // PS_DOT
$dashArray = [0.5, 0.5];
break;
case 3: // PS_DASHDOT
$dashArray = [2, 1, 0.5, 1];
break;
case 4: // PS_DASHDOTDOT
$dashArray = [2, 1, 0.5, 1, 0.5, 1];
break;
case 5: // PS_NULL
$nullPen = true;
break;
}
if (!$nullPen) {
$wmfdata .= $this->mpdf->SetDColor($this->colorConverter->convert('rgb(' . $obj['r'] . ',' . $obj['g'] . ',' . $obj['b'] . ')', $this->mpdf->PDFAXwarnings), true) . "\n";
$wmfdata .= sprintf("%.3F w\n", $obj['width'] * $k);
}
if (!empty($dashArray)) {
$s = '[';
for ($i = 0; $i < count($dashArray); $i++) {
$s .= $dashArray[$i] * $k;
if ($i != count($dashArray) - 1) {
$s .= ' ';
}
}
$s .= '] 0 d';
$wmfdata .= $s . "\n";
}
break;
}
break;
case 0x0325: // Polyline
case 0x0324: // Polygon
$coords = unpack('s' . ($size - 3), $parms);
$numpoints = $coords[1];
for ($i = $numpoints; $i > 0; $i--) {
$px = $coords[2 * $i];
$py = $coords[2 * $i + 1];
if ($i < $numpoints) {
$wmfdata .= $this->_LineTo($px, $py);
} else {
$wmfdata .= $this->_MoveTo($px, $py);
}
}
if ($func == 0x0325) {
$op = 's';
} elseif ($func == 0x0324) {
if ($nullPen) {
if ($nullBrush) {
$op = 'n';
} // no op
else {
$op = 'f';
} // fill
} else {
if ($nullBrush) {
$op = 's';
} // stroke
else {
$op = 'b';
} // stroke and fill
}
if ($polyFillMode == 1 && ($op == 'b' || $op == 'f')) {
$op .= '*';
} // use even-odd fill rule
}
$wmfdata .= $op . "\n";
break;
case 0x0538: // PolyPolygon
$coords = unpack('s' . ($size - 3), $parms);
$numpolygons = $coords[1];
$adjustment = $numpolygons;
for ($j = 1; $j <= $numpolygons; $j++) {
$numpoints = $coords[$j + 1];
for ($i = $numpoints; $i > 0; $i--) {
$px = $coords[2 * $i + $adjustment];
$py = $coords[2 * $i + 1 + $adjustment];
if ($i == $numpoints) {
$wmfdata .= $this->_MoveTo($px, $py);
} else {
$wmfdata .= $this->_LineTo($px, $py);
}
}
$adjustment += $numpoints * 2;
}
if ($nullPen) {
if ($nullBrush) {
$op = 'n';
} // no op
else {
$op = 'f';
} // fill
} else {
if ($nullBrush) {
$op = 's';
} // stroke
else {
$op = 'b';
} // stroke and fill
}
if ($polyFillMode == 1 && ($op == 'b' || $op == 'f')) {
$op .= '*';
} // use even-odd fill rule
$wmfdata .= $op . "\n";
break;
case 0x0000:
$endRecord = true;
break;
}
}
return [1, $wmfdata, $wo, $we];
}
function _MoveTo($x, $y)
{
return "$x $y m\n";
}
// a line must have been started using _MoveTo() first
function _LineTo($x, $y)
{
return "$x $y l\n";
}
function _AddGDIObject($obj)
{
// find next available slot
$idx = 0;
if (!empty($this->gdiObjectArray)) {
$empty = false;
$i = 0;
while (!$empty) {
$empty = !isset($this->gdiObjectArray[$i]);
$i++;
}
$idx = $i - 1;
}
$this->gdiObjectArray[$idx] = $obj;
}
function _GetGDIObject($idx)
{
return $this->gdiObjectArray[$idx];
}
function _DeleteGDIObject($idx)
{
unset($this->gdiObjectArray[$idx]);
}
}
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