WebGLTextures: Set all pixel storage modes for CubeTexture.

[11zouzouzou]

Unable to set the correct unpackAlignment when cubeTexture is set to dataTexture. So when i set the dataTexture(dataType:RBG) to Cubetexture the system will warn me and not work.

To solve：set the correct unpackAlignment

[Mugen87]

NIT: Please move both two new lines right below the existing:

_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );

The all pixelStorei() calls in uploadCubeTexture() are grouped together.

[Mugen87]

@mrdoob Do you know if there was a specific reason for excluding the following lines when using CubeTexture?

_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );

[11zouzouzou]

The unpackAlignment is needed

[11zouzouzou]

UNPACK_PREMULTIPLY_ALPHA_WEBGL.Webgl will have default Settings. If not set it, it is the default setting

[mrdoob]

@mrdoob Do you know if there was a specific reason for excluding the following lines when using CubeTexture?

Not that I know of.

[mrdoob]

Thanks!