一、类文档说明
class Image_Tool{
/**
* 构造Image_Tool对象
* @param string|array $img_data
* $img_data可以为图片的路径
*/
function __construct($img_data="");
/**
* 添加文字注解，或用于文字水印
* @access public
* @param string $txt UTF8编码的文本
* @param float $opacity 设置透明度
* @param constant $gravity
* 设置文字摆放位置:
* NorthWest,North,NorthEast,West, Center,East,SouthWest,South,SouthEast,Static
* @param array $font 字体数组可以设置如下属性:
* name,常量,字体名称，如果需要添加中文注解，请使用中文字体，否则中文会显示乱码。
* 支持的字体：SimSun(宋体,默认)、SimKai(楷体)、SimHei(正黑)、MicroHei(微米黑)、Arial
* weight,字体宽度,int
* size，字体大小,int
* color,字体颜色,例如："blue", "#0000ff", "rgb(0,0,255)"等，默认为"black";
* @return boolean
*/
function annotate($txt, $opacity, $gravity, array $font);
/**
* 将对象的数据重新初始化,用于多次重用一个Image_Tool对象
* @access public
* @return void
*/
function clean();
*
* 图片合成，可以进行多张图片的合成，也可以做图片水印用
* @access public
* @param int $src_img 合成的目标图片，可以为ImageTool对象或图片二进制数据
* @param int $x 合成在画布的X坐标
* @param string $y 合成在画布的Y坐标
* @return boolean
*
function composite($src_img, $x, $y);
/**
* 返回错误信息
* @access public
* @return string
*/
function errmsg();
/**
* 返回错误编号
* @access public
* @return int
*/
function errcode();
/**
* 进行图片处理操作
* @access public
* @param string $format
* @param boolean $display
* @return boolean|string 若设置$display为true，返回void，否则返回图片二进制数据。失败时返回false
*/
function exec($format, $display=false);
/**
* 水平翻转
* @access public
* @return boolean
*/
function flipH();
/**
* 垂直翻转
* @access public
* @return boolean
*/
function flipV();
/**
* 取得图片属性
* @access public
* @return array|boolean 错误返回false
*/
function getImageAttr();
/**
* 去噪点,改善图片质量，通常用于exec之前
* @access public
* @return boolean
*/
function improve();
/**
* 缩放图片,只指定width或者height时,将进行等比缩放
* @access public
* @param int $width
* @param int $height
* @param boolean $thumbnail 是否清除图片附加信息
* @return boolean
*/
function resize($width, $height, $thumbnail=true);
/**
* 按比例缩放.1为原大小
* @access public
* @param float $ratio
* @param boolean $thumbnail 是否清除图片附加信息
* @return boolean
*/
function resizeRatio($ratio, $thumbnail=true);
/**
* 顺时针旋转图片
* @access public
* @param int $degree 旋转度数（0 - 360）
* @return boolean
*/
function rotate($degree=90);
/**
* 设置要处理的图片二进制数据
* @access public
* @param string $img_blob
* @return boolean
*/
function setData($img_blob);
}
三、扩展实现
1.php_fetch_url.h
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifndef PHP_IMAGE_TOOL_H
#define PHP_IMAGE_TOOL_H
extern zend_module_entry image_tool_module_entry;
#define phpext_image_tool_ptr &image_tool_module_entry
#ifdef PHP_WIN32
# define PHP_IMAGE_TOOL_API __declspec(dllexport)
#elif defined(__GNUC__) && __GNUC__ >= 4
# define PHP_IMAGE_TOOL_API __attribute__ ((visibility("default")))
#else
# define PHP_IMAGE_TOOL_API
#endif
#ifdef ZTS
#include "TSRM.h"
#endif
#define FETCH_THIS Z_OBJCE_P(getThis()), getThis()
#define IMAGETOOL_MAGICKWAND_RSRC_NAME "MagickWand"
#define IMAGETOOL_PIXELWAND_RSRC_NAME "PixelWand"
#define IMAGETOOL_NORTHWEST 1
#define IMAGETOOL_NORTH 2
#define IMAGETOOL_NORTHEAST 3
#define IMAGETOOL_WEST 4
#define IMAGETOOL_CENTER 5
#define IMAGETOOL_EAST 6
#define IMAGETOOL_SOUTHWEST 7
#define IMAGETOOL_SOUTH 8
#define IMAGETOOL_SOUTHEAST 9
#define IMAGETOOL_STATIC 10
#define IMAGETOOL_TOP_LEFT 1
#define IMAGETOOL_TOP_CENTER 2
#define IMAGETOOL_TOP_RIGHT 3
#define IMAGETOOL_CENTER_LEFT 4
#define IMAGETOOL_CENTER_CENTER 5
#define IMAGETOOL_CENTER_RIGHT 6
#define IMAGETOOL_BOTTOM_LEFT 7
#define IMAGETOOL_BOTTOM_CENTER 8
#define IMAGETOOL_BOTTOM_RIGHT 9
#define GET_MAGICK_WAND(zval, magick_wand) zval = zend_read_property(FETCH_THIS, ZEND_STRL("magick_wand"), 0 TSRMLS_CC);\
ZEND_FETCH_RESOURCE_NO_RETURN(magick_wand, MagickWand*, &zval, -1, IMAGETOOL_MAGICKWAND_RSRC_NAME, le_image_wand);
PHP_MINIT_FUNCTION(image_tool);
PHP_MSHUTDOWN_FUNCTION(image_tool);
PHP_RINIT_FUNCTION(image_tool);
PHP_RSHUTDOWN_FUNCTION(image_tool);
PHP_MINFO_FUNCTION(image_tool);
#ifdef ZTS
#define IMAGE_TOOL_G(v) TSRMG(image_tool_globals_id, zend_image_tool_globals *, v)
#else
#define IMAGE_TOOL_G(v) (image_tool_globals.v)
#endif
#endif /* PHP_IMAGE_TOOL_H */