| 1: | <?php |
| 2: | /** |
| 3: | ##DOC-SIGNATURE## |
| 4: | |
| 5: | This file is part of WideImage. |
| 6: | |
| 7: | WideImage is free software; you can redistribute it and/or modify |
| 8: | it under the terms of the GNU Lesser General Public License as published by |
| 9: | the Free Software Foundation; either version 2.1 of the License, or |
| 10: | (at your option) any later version. |
| 11: | |
| 12: | WideImage 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 |
| 15: | GNU Lesser General Public License for more details. |
| 16: | |
| 17: | You should have received a copy of the GNU Lesser General Public License |
| 18: | along with WideImage; if not, write to the Free Software |
| 19: | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 20: | |
| 21: | * @package WideImage |
| 22: | **/ |
| 23: | |
| 24: | namespace WideImage; |
| 25: | |
| 26: | use WideImage\Font; |
| 27: | use WideImage\Exception\InvalidFontFileException; |
| 28: | use WideImage\Exception\NoFontException; |
| 29: | use WideImage\Exception\InvalidCanvasMethodException; |
| 30: | |
| 31: | /** |
| 32: | * @package WideImage |
| 33: | */ |
| 34: | class Canvas |
| 35: | { |
| 36: | protected $handle = 0; |
| 37: | protected $image = null; |
| 38: | protected $font = null; |
| 39: | |
| 40: | /** |
| 41: | * Creates a canvas object that writes to the image passed as a parameter |
| 42: | * |
| 43: | * Shouldn't be used directly, use \WideImage\Image::getCanvas() instead. |
| 44: | * |
| 45: | * @param \WideImage\Image $img Image object |
| 46: | */ |
| 47: | public function __construct($img) |
| 48: | { |
| 49: | $this->handle = $img->getHandle(); |
| 50: | $this->image = $img; |
| 51: | } |
| 52: | |
| 53: | /** |
| 54: | * Sets the active font. Can be an instance of |
| 55: | * \WideImage\Font\TTF, \WideImage\Font\PS, or \WideImage\Font\GDF. |
| 56: | * |
| 57: | * @param object $font Font object to set for writeText() |
| 58: | */ |
| 59: | public function setFont($font) |
| 60: | { |
| 61: | $this->font = $font; |
| 62: | } |
| 63: | |
| 64: | /** |
| 65: | * Creates and sets the current font |
| 66: | * |
| 67: | * The supported font types are: TTF/OTF, PS, and GDF. |
| 68: | * Font type is detected from the extension. If the $file parameter doesn't have an extension, TTF font is presumed. |
| 69: | * |
| 70: | * Note: not all parameters are supported by all fonts. |
| 71: | * |
| 72: | * @param string $file Font file name (string) |
| 73: | * @param int $size Font size (supported for TTF/OTF and PS fonts, ignored for GDF) |
| 74: | * @param int $color Text color |
| 75: | * @param int $bgcolor Background color (supported only for PS font, ignored for TTF and PS) |
| 76: | * @return mixed One of the \WideImage\Font\* objects |
| 77: | */ |
| 78: | public function useFont($file, $size = 12, $color = 0, $bgcolor = null) |
| 79: | { |
| 80: | $p = strrpos($file, '.'); |
| 81: | |
| 82: | if ($p === false || $p < strlen($file) - 4) { |
| 83: | $ext = 'ttf'; |
| 84: | } else { |
| 85: | $ext = strtolower(substr($file, $p + 1)); |
| 86: | } |
| 87: | |
| 88: | if ($ext == 'ttf' || $ext == 'otf') { |
| 89: | $font = new Font\TTF($file, $size, $color); |
| 90: | } elseif ($ext == 'ps') { |
| 91: | $font = new Font\PS($file, $size, $color, $bgcolor); |
| 92: | } elseif ($ext == 'gdf') { |
| 93: | $font = new Font\GDF($file, $color); |
| 94: | } else { |
| 95: | throw new InvalidFontFileException("'$file' appears to be an invalid font file."); |
| 96: | } |
| 97: | |
| 98: | $this->setFont($font); |
| 99: | return $font; |
| 100: | } |
| 101: | |
| 102: | /** |
| 103: | * Write text on the image at specified position |
| 104: | * |
| 105: | * You must set a font with a call to \WideImage\Canvas::setFont() prior to writing text to the image. |
| 106: | * |
| 107: | * Smart coordinates are supported for $x and $y arguments, but currently only for TTF/OTF fonts. |
| 108: | * |
| 109: | * Example: |
| 110: | * <code> |
| 111: | * $img = WideImage::load('pic.jpg'); |
| 112: | * $canvas = $img->getCanvas(); |
| 113: | * $canvas->useFont('Verdana.ttf', 16, $img->allocateColor(255, 0, 0)); |
| 114: | * $canvas->writeText('right', 'bottom', 'www.website.com'); |
| 115: | * </code> |
| 116: | * |
| 117: | * @param int $x Left |
| 118: | * @param int $y Top |
| 119: | * @param string $text Text to write |
| 120: | * @param int $angle The angle, defaults to 0 |
| 121: | */ |
| 122: | public function writeText($x, $y, $text, $angle = 0) |
| 123: | { |
| 124: | if ($this->font === null) { |
| 125: | throw new NoFontException("Can't write text without a font."); |
| 126: | } |
| 127: | |
| 128: | $angle = - floatval($angle); |
| 129: | |
| 130: | if ($angle < 0) { |
| 131: | $angle = 360 + $angle; |
| 132: | } |
| 133: | |
| 134: | $angle = $angle % 360; |
| 135: | |
| 136: | $this->font->writeText($this->image, $x, $y, $text, $angle); |
| 137: | } |
| 138: | |
| 139: | /** |
| 140: | * A magic method that allows you to call any PHP function that starts with "image". |
| 141: | * |
| 142: | * This is a shortcut to call custom functions on the image handle. |
| 143: | * |
| 144: | * Example: |
| 145: | * <code> |
| 146: | * $img = WideImage::load('pic.jpg'); |
| 147: | * $canvas = $img->getCanvas(); |
| 148: | * $canvas->filledRect(10, 10, 20, 30, $img->allocateColor(0, 0, 0)); |
| 149: | * $canvas->line(60, 80, 30, 100, $img->allocateColor(255, 0, 0)); |
| 150: | * </code> |
| 151: | */ |
| 152: | function __call($method, $params) |
| 153: | { |
| 154: | if (function_exists('image' . $method)) { |
| 155: | array_unshift($params, $this->handle); |
| 156: | call_user_func_array('image' . $method, $params); |
| 157: | } else { |
| 158: | throw new InvalidCanvasMethodException("Function doesn't exist: image{$method}."); |
| 159: | } |
| 160: | } |
| 161: | } |
| 162: |