background: Optimize texture uploading by only calling glTexImage2D once #44
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Before, we were uploading a texture twice: once when it's picked and once after it switches to fade out. This makes it so the old texture id is reused when fading to a new image, and avoids a call to glTexImage2D.
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Before, we were uploading a texture twice: once when it's picked and once after it switches to fade out. This makes it so the old texture id is reused when fading to a new image, and avoids a call to glTexImage2D.