public static int getImageSize(FTEX_Texture t)
{
switch (t.type)
{
case PixelInternalFormat.CompressedRgbaS3tcDxt1Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt1Ext:
case PixelInternalFormat.CompressedRedRgtc1:
case PixelInternalFormat.CompressedSignedRedRgtc1:
return(t.width * t.height / 2);
case PixelInternalFormat.CompressedRgbaS3tcDxt3Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt3Ext:
case PixelInternalFormat.CompressedRgbaS3tcDxt5Ext:
case PixelInternalFormat.CompressedSrgbAlphaS3tcDxt5Ext:
case PixelInternalFormat.CompressedSignedRgRgtc2:
case PixelInternalFormat.CompressedRgRgtc2:
return(t.width * t.height);
case PixelInternalFormat.Rgba:
return(t.data.Length);
default:
return(t.data.Length);
}
}
public static SFTex.Texture2D CreateTexture2D(FTEX_Texture tex, int surfaceIndex = 0)
{
bool compressedFormatWithMipMaps = SFTex.TextureFormatTools.IsCompressed(tex.pixelInternalFormat);
//Todo. Use mip maps from FTEX
if (compressedFormatWithMipMaps)
{
if (tex.mipMapData.Count > 1)
{
// Only load the first level and generate the rest.
SFTex.Texture2D texture = new SFTex.Texture2D();
texture.LoadImageData(tex.width, tex.height, tex.data, tex.mipMapData.Count,
(InternalFormat)tex.pixelInternalFormat);
return(texture);
}
else
{
// Only load the first level and generate the rest.
SFTex.Texture2D texture = new SFTex.Texture2D();
texture.LoadImageData(tex.width, tex.height, tex.data, tex.mipMapData.Count,
(InternalFormat)tex.pixelInternalFormat);
return(texture);
}
}
else
{
// Uncompressed.
SFTex.Texture2D texture = new SFTex.Texture2D();
texture.LoadImageData(tex.width, tex.height, tex.data, tex.mipMapCount,
new SFTex.TextureFormatUncompressed(tex.pixelInternalFormat, tex.pixelFormat, tex.pixelType));
return(texture);
}
}
public static int loadImage(FTEX_Texture t)
{
int texID = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texID);
if (t.type != PixelInternalFormat.Rgba)
{
GL.CompressedTexImage2D <byte>(TextureTarget.Texture2D, 0, (InternalFormat)t.type,
t.width, t.height, 0, getImageSize(t), t.data);
//Debug.WriteLine(GL.GetError());
}
else
{
GL.TexImage2D <byte>(TextureTarget.Texture2D, 0, t.type, t.width, t.height, 0,
t.utype, PixelType.UnsignedByte, t.data);
}
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
return(texID);
}
