public static GLTextureCube FromDDS(DDS dds, bool flipY = false, bool isBGRA = false)
{
int size = (int)dds.Width;
GLTextureCube texture = new GLTextureCube();
texture.Width = size; texture.Height = size;
texture.Bind();
InternalFormat format = InternalFormat.CompressedRgbaS3tcDxt5Ext;
if (dds.Platform.OutputFormat == TexFormat.BC6H_UF16)
{
format = InternalFormat.CompressedRgbBptcUnsignedFloat;
}
if (dds.Platform.OutputFormat == TexFormat.BC6H_SF16)
{
format = InternalFormat.CompressedRgbBptcSignedFloat;
}
if (dds.Platform.OutputFormat == TexFormat.RGBA8_UNORM)
{
format = InternalFormat.Rgba8;
}
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < dds.MipCount; j++)
{
int mipWidth = CalculateMipDimension(texture.Width, j);
int mipHeight = CalculateMipDimension(texture.Height, j);
int imageSize = GLFormatHelper.CalculateImageSize(mipWidth, mipHeight, format);
var surface = dds.GetDeswizzledSurface(i, j);
if (dds.Parameters.UseSoftwareDecoder || flipY)
{
surface = dds.GetDecodedSurface(i, j);
format = InternalFormat.Rgba8;
}
if (flipY)
{
surface = FlipVertical(mipWidth, mipHeight, surface);
}
if (format == InternalFormat.Rgba8)
{
GL.TexImage2D(TextureTarget.TextureCubeMapPositiveX + i, j,
PixelInternalFormat.Rgba,
mipWidth, mipHeight, 0, PixelFormat.Rgba, PixelType.UnsignedByte,
surface);
}
else
{
GL.CompressedTexImage2D(TextureTarget.TextureCubeMapPositiveX + i, j,
format,
mipWidth, mipHeight,
0, imageSize, surface);
}
}
}
texture.Unbind();
return(texture);
}
