Файл: outs/wideimage/Canvas.php
Строк: 203
<?php
/**
* @author Gasper Kozak
* @copyright 2007-2011
This file is part of WideImage.
WideImage is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
WideImage is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with WideImage; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* @package WideImage
**/
/**
* @package Exceptions
*/
class WideImage_NoFontException extends WideImage_Exception {}
/**
* @package Exceptions
*/
class WideImage_InvalidFontFileException extends WideImage_Exception {}
/**
* @package Exceptions
*/
class WideImage_InvalidCanvasMethodException extends WideImage_Exception {}
/**
* @package WideImage
*/
class WideImage_Canvas
{
protected $handle = 0;
protected $image = null;
protected $font = null;
/**
* Creates a canvas object that writes to the image passed as a parameter
*
* Shouldn't be used directly, use WideImage_Image::getCanvas() instead.
*
* @param WideImage_Image $img Image object
*/
function __construct($img)
{
$this->handle = $img->getHandle();
$this->image = $img;
}
/**
* Sets the active font. Can be an instance of
* WideImage_Font_TTF, WideImage_Font_PS, or WideImage_Font_GDF.
*
*
*
*
* @param object $font Font object to set for writeText()
*/
function setFont($font)
{
$this->font = $font;
}
/**
* Creates and sets the current font
*
* The supported font types are: TTF/OTF, PS, and GDF.
* Font type is detected from the extension. If the $file parameter doesn't have an extension, TTF font is presumed.
*
* Note: not all parameters are supported by all fonts.
*
* @param string $file Font file name (string)
* @param int $size Font size (supported for TTF/OTF and PS fonts, ignored for GDF)
* @param int $color Text color
* @param int $bgcolor Background color (supported only for PS font, ignored for TTF and PS)
* @return mixed One of the WideImage_Font_* objects
*/
function useFont($file, $size = 12, $color = 0, $bgcolor = null)
{
$p = strrpos($file, '.');
if ($p === false || $p < strlen($file) - 4)
$ext = 'ttf';
else
$ext = strtolower(substr($file, $p + 1));
if ($ext == 'ttf' || $ext == 'otf')
$font = new WideImage_Font_TTF($file, $size, $color);
elseif ($ext == 'ps')
$font = new WideImage_Font_PS($file, $size, $color, $bgcolor);
elseif ($ext == 'gdf')
$font = new WideImage_Font_GDF($file, $color);
else
throw new WideImage_InvalidFontFileException("'$file' appears to be an invalid font file.");
$this->setFont($font);
return $font;
}
/**
* Write text on the image at specified position
*
* You must set a font with a call to WideImage_Canvas::setFont() prior to writing text to the image.
*
* Smart coordinates are supported for $x and $y arguments, but currently only for TTF/OTF fonts.
*
* Example:
* <code>
* $img = WideImage::load('pic.jpg');
* $canvas = $img->getCanvas();
* $canvas->useFont('Verdana.ttf', 16, $img->allocateColor(255, 0, 0));
* $canvas->writeText('right', 'bottom', 'www.website.com');
* </code>
*
* @param int $x Left
* @param int $y Top
* @param string $text Text to write
* @param int $angle The angle, defaults to 0
*/
function writeText($x, $y, $text, $angle = 0)
{
if ($this->font === null)
throw new WideImage_NoFontException("Can't write text without a font.");
$angle = - floatval($angle);
if ($angle < 0)
$angle = 360 + $angle;
$angle = $angle % 360;
$this->font->writeText($this->image, $x, $y, $text, $angle);
}
/**
* A magic method that allows you to call any PHP function that starts with "image".
*
* This is a shortcut to call custom functions on the image handle.
*
* Example:
* <code>
* $img = WideImage::load('pic.jpg');
* $canvas = $img->getCanvas();
* $canvas->filledRect(10, 10, 20, 30, $img->allocateColor(0, 0, 0));
* $canvas->line(60, 80, 30, 100, $img->allocateColor(255, 0, 0));
* </code>
*/
function __call($method, $params)
{
if (function_exists('image' . $method))
{
array_unshift($params, $this->handle);
call_user_func_array('image' . $method, $params);
}
else
throw new WideImage_InvalidCanvasMethodException("Function doesn't exist: image{$method}.");
}
}