visualizer / vendor / phpoffice / phpexcel / Classes / PHPExcel / Shared / Drawing.php

Drawing.php in Visualizer – Tables & Charts Manager with Built-in AI Generator 3.0.3, at vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/Drawing.php

273 lines 8.3 KB

Raw Download Zip

1	<?php
2	/**
3	* PHPExcel
4	*
5	* Copyright (c) 2006 - 2014 PHPExcel
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*
21	* @category PHPExcel
22	* @package PHPExcel_Shared
23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25	* @version ##VERSION##, ##DATE##
26	*/
27
28
29	/**
30	* PHPExcel_Shared_Drawing
31	*
32	* @category PHPExcel
33	* @package PHPExcel_Shared
34	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35	*/
36	class PHPExcel_Shared_Drawing
37	{
38	/**
39	* Convert pixels to EMU
40	*
41	* @param int $pValue Value in pixels
42	* @return int Value in EMU
43	*/
44	public static function pixelsToEMU($pValue = 0) {
45	return round($pValue * 9525);
46	}
47
48	/**
49	* Convert EMU to pixels
50	*
51	* @param int $pValue Value in EMU
52	* @return int Value in pixels
53	*/
54	public static function EMUToPixels($pValue = 0) {
55	if ($pValue != 0) {
56	return round($pValue / 9525);
57	} else {
58	return 0;
59	}
60	}
61
62	/**
63	* Convert pixels to column width. Exact algorithm not known.
64	* By inspection of a real Excel file using Calibri 11, one finds 1000px ~ 142.85546875
65	* This gives a conversion factor of 7. Also, we assume that pixels and font size are proportional.
66	*
67	* @param int $pValue Value in pixels
68	* @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook
69	* @return int Value in cell dimension
70	*/
71	public static function pixelsToCellDimension($pValue = 0, PHPExcel_Style_Font $pDefaultFont) {
72	// Font name and size
73	$name = $pDefaultFont->getName();
74	$size = $pDefaultFont->getSize();
75
76	if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) {
77	// Exact width can be determined
78	$colWidth = $pValue
79	* PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width']
80	/ PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px'];
81	} else {
82	// We don't have data for this particular font and size, use approximation by
83	// extrapolating from Calibri 11
84	$colWidth = $pValue * 11
85	* PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width']
86	/ PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px'] / $size;
87	}
88
89	return $colWidth;
90	}
91
92	/**
93	* Convert column width from (intrinsic) Excel units to pixels
94	*
95	* @param float $pValue Value in cell dimension
96	* @param PHPExcel_Style_Font $pDefaultFont Default font of the workbook
97	* @return int Value in pixels
98	*/
99	public static function cellDimensionToPixels($pValue = 0, PHPExcel_Style_Font $pDefaultFont) {
100	// Font name and size
101	$name = $pDefaultFont->getName();
102	$size = $pDefaultFont->getSize();
103
104	if (isset(PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size])) {
105	// Exact width can be determined
106	$colWidth = $pValue
107	* PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['px']
108	/ PHPExcel_Shared_Font::$defaultColumnWidths[$name][$size]['width'];
109
110	} else {
111	// We don't have data for this particular font and size, use approximation by
112	// extrapolating from Calibri 11
113	$colWidth = $pValue * $size
114	* PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['px']
115	/ PHPExcel_Shared_Font::$defaultColumnWidths['Calibri'][11]['width'] / 11;
116	}
117
118	// Round pixels to closest integer
119	$colWidth = (int) round($colWidth);
120
121	return $colWidth;
122	}
123
124	/**
125	* Convert pixels to points
126	*
127	* @param int $pValue Value in pixels
128	* @return int Value in points
129	*/
130	public static function pixelsToPoints($pValue = 0) {
131	return $pValue * 0.67777777;
132	}
133
134	/**
135	* Convert points to pixels
136	*
137	* @param int $pValue Value in points
138	* @return int Value in pixels
139	*/
140	public static function pointsToPixels($pValue = 0) {
141	if ($pValue != 0) {
142	return (int) ceil($pValue * 1.333333333);
143	} else {
144	return 0;
145	}
146	}
147
148	/**
149	* Convert degrees to angle
150	*
151	* @param int $pValue Degrees
152	* @return int Angle
153	*/
154	public static function degreesToAngle($pValue = 0) {
155	return (int)round($pValue * 60000);
156	}
157
158	/**
159	* Convert angle to degrees
160	*
161	* @param int $pValue Angle
162	* @return int Degrees
163	*/
164	public static function angleToDegrees($pValue = 0) {
165	if ($pValue != 0) {
166	return round($pValue / 60000);
167	} else {
168	return 0;
169	}
170	}
171
172	/**
173	* Create a new image from file. By alexander at alexauto dot nl
174	*
175	* @link http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
176	* @param string $filename Path to Windows DIB (BMP) image
177	* @return resource
178	*/
179	public static function imagecreatefrombmp($p_sFile)
180	{
181	// Load the image into a string
182	$file = fopen($p_sFile,"rb");
183	$read = fread($file,10);
184	while(!feof($file)&&($read<>""))
185	$read .= fread($file,1024);
186
187	$temp = unpack("H*",$read);
188	$hex = $temp[1];
189	$header = substr($hex,0,108);
190
191	// Process the header
192	// Structure: http://www.fastgraph.com/help/bmp_header_format.html
193	if (substr($header,0,4)=="424d")
194	{
195	// Cut it in parts of 2 bytes
196	$header_parts = str_split($header,2);
197
198	// Get the width 4 bytes
199	$width = hexdec($header_parts[19].$header_parts[18]);
200
201	// Get the height 4 bytes
202	$height = hexdec($header_parts[23].$header_parts[22]);
203
204	// Unset the header params
205	unset($header_parts);
206	}
207
208	// Define starting X and Y
209	$x = 0;
210	$y = 1;
211
212	// Create newimage
213	$image = imagecreatetruecolor($width,$height);
214
215	// Grab the body from the image
216	$body = substr($hex,108);
217
218	// Calculate if padding at the end-line is needed
219	// Divided by two to keep overview.
220	// 1 byte = 2 HEX-chars
221	$body_size = (strlen($body)/2);
222	$header_size = ($width*$height);
223
224	// Use end-line padding? Only when needed
225	$usePadding = ($body_size>($header_size*3)+4);
226
227	// Using a for-loop with index-calculation instaid of str_split to avoid large memory consumption
228	// Calculate the next DWORD-position in the body
229	for ($i=0;$i<$body_size;$i+=3)
230	{
231	// Calculate line-ending and padding
232	if ($x>=$width)
233	{
234	// If padding needed, ignore image-padding
235	// Shift i to the ending of the current 32-bit-block
236	if ($usePadding)
237	$i += $width%4;
238
239	// Reset horizontal position
240	$x = 0;
241
242	// Raise the height-position (bottom-up)
243	$y++;
244
245	// Reached the image-height? Break the for-loop
246	if ($y>$height)
247	break;
248	}
249
250	// Calculation of the RGB-pixel (defined as BGR in image-data)
251	// Define $i_pos as absolute position in the body
252	$i_pos = $i*2;
253	$r = hexdec($body[$i_pos+4].$body[$i_pos+5]);
254	$g = hexdec($body[$i_pos+2].$body[$i_pos+3]);
255	$b = hexdec($body[$i_pos].$body[$i_pos+1]);
256
257	// Calculate and draw the pixel
258	$color = imagecolorallocate($image,$r,$g,$b);
259	imagesetpixel($image,$x,$height-$y,$color);
260
261	// Raise the horizontal position
262	$x++;
263	}
264
265	// Unset the body / free the memory
266	unset($body);
267
268	// Return image-object
269	return $image;
270	}
271
272	}
273