WEB-INF/lib/libchart/classes/view/text/Text.php

   1 <?php
   2         /* Libchart - PHP chart library
   3          * Copyright (C) 2005-2008 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
   4          *
   5          * This program is free software: you can redistribute it and/or modify
   6          * it under the terms of the GNU General Public License as published by
   7          * the Free Software Foundation, either version 3 of the License, or
   8          * (at your option) any later version.
   9          *
  10          * This program is distributed in the hope that it will be useful,
  11          * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12          * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13          * GNU General Public License for more details.
  14          *
  15          * You should have received a copy of the GNU General Public License
  16          * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17          *
  18          */
  19
  20         /**
  21          * Text drawing helper
  22          *
  23          * @author Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
  24          */
  25         class Text {
  26                 public $HORIZONTAL_LEFT_ALIGN = 1;
  27                 public $HORIZONTAL_CENTER_ALIGN = 2;
  28                 public $HORIZONTAL_RIGHT_ALIGN = 4;
  29                 public $VERTICAL_TOP_ALIGN = 8;
  30                 public $VERTICAL_CENTER_ALIGN = 16;
  31                 public $VERTICAL_BOTTOM_ALIGN = 32;
  32
  33                 /**
  34                  * Creates a new text drawing helper.
  35                  */
  36                 public function Text() {
  37                         $baseDir = dirname(__FILE__) . "/../../../";
  38
  39                         // Free low-res fonts based on Bitstream Vera <http://dejavu.sourceforge.net/wiki/>
  40                         $this->fontCondensed = $baseDir . "fonts/DejaVuSansCondensed.ttf";
  41                         $this->fontCondensedBold = $baseDir . "fonts/DejaVuSansCondensed-Bold.ttf";
  42                 }
  43
  44                 /**
  45                  * Print text.
  46                  *
  47                  * @param Image GD image
  48                  * @param integer text coordinate (x)
  49                  * @param integer text coordinate (y)
  50                  * @param Color text color
  51                  * @param string text value
  52                  * @param string font file name
  53                  * @param bitfield text alignment
  54                  */
  55                 public function printText($img, $px, $py, $color, $text, $fontFileName, $align = 0) {
  56                         if (!($align & $this->HORIZONTAL_CENTER_ALIGN) && !($align & $this->HORIZONTAL_RIGHT_ALIGN)) {
  57                                 $align |= $this->HORIZONTAL_LEFT_ALIGN;
  58                         }
  59
  60                         if (!($align & $this->VERTICAL_CENTER_ALIGN) && !($align & $this->VERTICAL_BOTTOM_ALIGN)) {
  61                                 $align |= $this->VERTICAL_TOP_ALIGN;
  62                         }
  63
  64                         $fontSize = 8;
  65                         $lineSpacing = 1;
  66
  67                         list ($llx, $lly, $lrx, $lry, $urx, $ury, $ulx, $uly) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));
  68
  69                         $textWidth = $lrx - $llx;
  70                         $textHeight = $lry - $ury;
  71
  72                         $angle = 0;
  73
  74                         if ($align & $this->HORIZONTAL_CENTER_ALIGN) {
  75                                 $px -= $textWidth / 2;
  76                         }
  77
  78                         if ($align & $this->HORIZONTAL_RIGHT_ALIGN) {
  79                                 $px -= $textWidth;
  80                         }
  81
  82                         if ($align & $this->VERTICAL_CENTER_ALIGN) {
  83                                 $py += $textHeight / 2;
  84                         }
  85
  86                         if ($align & $this->VERTICAL_TOP_ALIGN) {
  87                                 $py += $textHeight;
  88                         }
  89
  90                         imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
  91                 }
  92
  93                 /**
  94                  * Print text centered horizontally on the image.
  95                  *
  96                  * @param Image GD image
  97                  * @param integer text coordinate (y)
  98                  * @param Color text color
  99                  * @param string text value
 100                  * @param string font file name
 101                  */
 102                 public function printCentered($img, $py, $color, $text, $fontFileName) {
 103                         $this->printText($img, imagesx($img) / 2, $py, $color, $text, $fontFileName, $this->HORIZONTAL_CENTER_ALIGN | $this->VERTICAL_CENTER_ALIGN);
 104                 }
 105
 106                 /**
 107                  * Print text in diagonal.
 108                  *
 109                  * @param Image GD image
 110                  * @param integer text coordinate (x)
 111                  * @param integer text coordinate (y)
 112                  * @param Color text color
 113                  * @param string text value
 114                  */
 115                 public function printDiagonal($img, $px, $py, $color, $text) {
 116                         $fontSize = 8;
 117                         $fontFileName = $this->fontCondensed;
 118
 119                         $lineSpacing = 1;
 120
 121                         list ($lx, $ly, $rx, $ry) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));
 122                         $textWidth = $rx - $lx;
 123
 124                         $angle = -45;
 125
 126                         imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
 127                 }
 128         }
 129 ?>