End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
OpenGL 기초 8: 텍스처(비트맵, 픽셀맵), 폴리곤 스티플, 텍스처 매핑, 축소된 서브셋(ES) http://yoonbumtae.com/?p=989