PHP根据图片色阶确定位置打水印

直接分享源码

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<li class="alt"><span><span><?php     </span></span></span></li>
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<span>    </span><span class="keyword">function</span><span> add_wm(</span><span class="vars">$nmw_water</span><span>, </span><span class="vars">$src_file</span><span>, </span><span class="vars">$output_file</span><span>, </span><span class="vars">$x</span><span>, </span><span class="vars">$y</span><span>) {    </span>
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<span>        </span><span class="keyword">if</span><span>(</span><span class="func">file_exists</span><span>(</span><span class="vars">$output_file</span><span>))    </span>
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<span>            </span><span class="keyword">return</span><span>;    </span>
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<li class="alt"><span>    </span></li>
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<span>        </span><span class="vars">$w1</span><span> = MagickGetImageWidth(</span><span class="vars">$nmw_water</span><span>);    </span>
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<span>        </span><span class="vars">$h1</span><span> = MagickGetImageHeight(</span><span class="vars">$nmw_water</span><span>);    </span>
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<li><span>    </span></li>
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<span>        </span><span class="vars">$nmw</span><span> =NewMagickWand();    </span>
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<span>        MagickReadImage(</span><span class="vars">$nmw</span><span>, </span><span class="vars">$src_file</span><span>);    </span>
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<li class="alt"><span>    </span></li>
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<span>        </span><span class="comment">// 默认的加水印位置调整   </span><span> </span>
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<span>        </span><span class="vars">$lt_w</span><span> = 50;    </span>
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<span>        </span><span class="vars">$lt_h</span><span> = 50;    </span>
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<li class="alt"><span>    </span></li>
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<span>        </span><span class="keyword">if</span><span>(</span><span class="vars">$x</span><span> == 0){    </span>
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<span>            </span><span class="vars">$w</span><span> = MagickGetImageWidth(</span><span class="vars">$nmw</span><span>);    </span>
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<span>            </span><span class="vars">$h</span><span> = MagickGetImageHeight(</span><span class="vars">$nmw</span><span>);    </span>
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<span>            </span><span class="vars">$x</span><span> = </span><span class="vars">$w</span><span>;    </span>
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<span>            </span><span class="vars">$y</span><span> = </span><span class="vars">$h</span><span>;    </span>
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<span>        }</span><span class="keyword">else</span><span>{    </span>
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<span>            </span><span class="comment">// 根据具体情况调整   </span><span> </span>
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<span>            </span><span class="vars">$lt_w</span><span> = 30;    </span>
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<span>            </span><span class="vars">$lt_h</span><span> = 40;    </span>
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<li><span>        }    </span></li>
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<span>        MagickCompositeImage(</span><span class="vars">$nmw</span><span>, </span><span class="vars">$nmw_water</span><span>, MW_OverCompositeOp, </span><span class="vars">$x</span><span> - </span><span class="vars">$w1</span><span> - </span><span class="vars">$lt_w</span><span>, </span><span class="vars">$y</span><span> - </span><span class="vars">$h1</span><span> - </span><span class="vars">$lt_h</span><span>);    </span>
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<span>        MagickWriteImage(</span><span class="vars">$nmw</span><span>, </span><span class="vars">$output_file</span><span>);    </span>
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<li><span>    </span></li>
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<span>        DestroyMagickWand(</span><span class="vars">$nmw</span><span>);            </span>
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<li><span>    }    </span></li>
<li class="alt"><span>    </span></li>
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<span>    </span><span class="comment">// 还是groovy的eachFileRecurse好用啊   </span><span> </span>
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<span>    </span><span class="keyword">function</span><span> add_wm_recurse(</span><span class="vars">$nmw_water</span><span>, </span><span class="vars">$to_dir</span><span>, </span><span class="vars">$output_dir</span><span>, </span><span class="vars">$arr</span><span>) {    </span>
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<span>        </span><span class="vars">$dp</span><span> = dir(</span><span class="vars">$to_dir</span><span>);    </span>
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<span>        </span><span class="keyword">while</span><span>(</span><span class="vars">$file</span><span>=</span><span class="vars">$dp</span><span>->read()){    </span>
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<span>            </span><span class="keyword">if</span><span>(</span><span class="vars">$file</span><span> != </span><span class="string">.</span><span> && </span><span class="vars">$file</span><span> != </span><span class="string">..</span><span>){    </span>
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<span>                </span><span class="keyword">if</span><span>(</span><span class="func">is_dir</span><span>(</span><span class="vars">$to_dir</span><span> . </span><span class="string">/</span><span> . </span><span class="vars">$file</span><span>)){    </span>
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<span>                    </span><span class="func">mkdir</span><span>(</span><span class="vars">$output_dir</span><span> . </span><span class="string">/</span><span> . </span><span class="vars">$file</span><span>);    </span>
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<span>                    add_wm_recurse(</span><span class="vars">$nmw_water</span><span>, </span><span class="vars">$to_dir</span><span> . </span><span class="string">/</span><span> . </span><span c>
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