PHP에서 imageaffinematrixget 기능을 사용하는 방법은 무엇입니까? 기본 사용 및 자세한 소개

gitbox 2025-09-19

2. 기본 사용 예제

2.1 이미지를 번역하십시오

 <span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-variable">$image</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imagecreatefromjpeg</span></span><span>(</span><span><span class="hljs-string">'example.jpg'</span></span><span>);

</span><span><span class="hljs-comment">// 번역 매트릭스를 얻으십시오</span></span><span>
</span><span><span class="hljs-variable">$matrix</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixget</span></span><span>(IMG_AFFINE_TRANSLATE, [</span><span><span class="hljs-string">'x'</span></span><span> =&gt; </span><span><span class="hljs-number">50</span></span><span>, </span><span><span class="hljs-string">'y'</span></span><span> =&gt; </span><span><span class="hljs-number">30</span></span><span>]);

</span><span><span class="hljs-comment">// 이미지에 행렬을 적용하십시오</span></span><span>
</span><span><span class="hljs-variable">$translated</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffine</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>, </span><span><span class="hljs-variable">$matrix</span></span><span>);

</span><span><span class="hljs-comment">// 출력 결과</span></span><span>
</span><span><span class="hljs-title function_ invoke__">header</span></span><span>(</span><span><span class="hljs-string">'Content-Type: image/jpeg'</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagejpeg</span></span><span>(</span><span><span class="hljs-variable">$translated</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$translated</span></span><span>);
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>

위의 코드는 이미지 50 픽셀을 오른쪽으로, 30 픽셀을 아래쪽으로 이동합니다.

2.2 이미지를 확대하십시오

 <span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-variable">$image</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imagecreatefromjpeg</span></span><span>(</span><span><span class="hljs-string">'example.jpg'</span></span><span>);

</span><span><span class="hljs-comment">// 스케일링 매트릭스를 얻으십시오</span></span><span>
</span><span><span class="hljs-variable">$matrix</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixget</span></span><span>(IMG_AFFINE_SCALE, [</span><span><span class="hljs-string">'x'</span></span><span> =&gt; </span><span><span class="hljs-number">1.5</span></span><span>, </span><span><span class="hljs-string">'y'</span></span><span> =&gt; </span><span><span class="hljs-number">0.8</span></span><span>]);

</span><span><span class="hljs-comment">// 이미지에 행렬을 적용하십시오</span></span><span>
</span><span><span class="hljs-variable">$scaled</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffine</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>, </span><span><span class="hljs-variable">$matrix</span></span><span>);

</span><span><span class="hljs-title function_ invoke__">header</span></span><span>(</span><span><span class="hljs-string">'Content-Type: image/jpeg'</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagejpeg</span></span><span>(</span><span><span class="hljs-variable">$scaled</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$scaled</span></span><span>);
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>

이 코드는 이미지를 수평으로 1.5 배 증가시키고 수직으로 0.8 배로 줄어 듭니다.

2.3 이미지를 회전시킵니다

 <span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-variable">$image</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imagecreatefromjpeg</span></span><span>(</span><span><span class="hljs-string">'example.jpg'</span></span><span>);

</span><span><span class="hljs-comment">// 회전 매트릭스를 얻으십시오</span></span><span>
</span><span><span class="hljs-variable">$matrix</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixget</span></span><span>(IMG_AFFINE_ROTATE, [</span><span><span class="hljs-string">'angle'</span></span><span> =&gt; </span><span><span class="hljs-number">45</span></span><span>]);

</span><span><span class="hljs-variable">$rotated</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffine</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>, </span><span><span class="hljs-variable">$matrix</span></span><span>);

</span><span><span class="hljs-title function_ invoke__">header</span></span><span>(</span><span><span class="hljs-string">'Content-Type: image/jpeg'</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagejpeg</span></span><span>(</span><span><span class="hljs-variable">$rotated</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">imagedestroy</span></span><span>(</span><span><span class="hljs-variable">$rotated</span></span><span>);
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>

여기서 이미지는 시계 방향으로 45도 회전합니다.

3. 고급 사용

3.1 매트릭스 조합

때로는 이미지를 동시에 스케일링하고 회전해야하며 imageAffinematrixconcat을 사용하여 행렬을 결합 할 수 있습니다.

 <span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-variable">$scale</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixget</span></span><span>(IMG_AFFINE_SCALE, [</span><span><span class="hljs-string">'x'</span></span><span> =&gt; </span><span><span class="hljs-number">2.0</span></span><span>, </span><span><span class="hljs-string">'y'</span></span><span> =&gt; </span><span><span class="hljs-number">2.0</span></span><span>]);
</span><span><span class="hljs-variable">$rotate</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixget</span></span><span>(IMG_AFFINE_ROTATE, [</span><span><span class="hljs-string">'angle'</span></span><span> =&gt; </span><span><span class="hljs-number">30</span></span><span>]);

</span><span><span class="hljs-variable">$combined</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffinematrixconcat</span></span><span>(</span><span><span class="hljs-variable">$scale</span></span><span>, </span><span><span class="hljs-variable">$rotate</span></span><span>);

</span><span><span class="hljs-variable">$transformed</span></span><span> = </span><span><span class="hljs-title function_ invoke__">imageaffine</span></span><span>(</span><span><span class="hljs-variable">$image</span></span><span>, </span><span><span class="hljs-variable">$combined</span></span><span>);
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>

3.2 참고

매트릭스의 적용은 이미지 가장자리 자르기를 유발할 수 있으며 imageaffine 의 $ 클립 매개 변수를 사용하여 출력 크기를 조정할 수 있습니다.
ImageAffinematrixGet 에서 반환 한 행렬은 부동 소수점 번호를 사용해야합니다. 그렇지 않으면 예상치 못한 결과가 발생할 수 있습니다.
매트릭스의 순서는 매우 중요합니다. 먼저 스케일링 한 다음 먼저 회전 한 다음 스케일링이 다릅니다.