private MeshTexture TextureFromFile(string filename, string directory, string typeName)
{
string resPath = directory + @"\" + filename;
MeshTexture texture = new MeshTexture
{
Type = typeName,
Path = filename
};
// load texture file with StbImage
var io = new System.IO.FileStream(resPath, System.IO.FileMode.Open);
var resLoad = ImageResult.FromStream(io);
int width = resLoad.Width, height = resLoad.Height;
ColorComponents nrComponents = resLoad.SourceComp;
if (resLoad != null)
{
PixelInternalFormat format = 0;
if (nrComponents == ColorComponents.Grey)
{
format = PixelInternalFormat.CompressedRed;
}
else if (nrComponents == ColorComponents.RedGreenBlue)
{
format = PixelInternalFormat.Rgb;
}
else if (nrComponents == ColorComponents.RedGreenBlueAlpha)
{
format = PixelInternalFormat.Rgba;
}
// send necessary actions to dispatcher
Dispatcher.ActionsQueue.Enqueue(() =>
{
// load and generate the texture
GL.GenTextures(1, out texture.ID);
GL.BindTexture(TextureTarget.Texture2D, texture.ID);
GL.TexImage2D(TextureTarget.Texture2D, 0, format, width, height, 0, (PixelFormat)format, PixelType.UnsignedByte, resLoad.Data);
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
// set the texture wrapping/filtering options (on the currently bound texture object)
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)OpenTK.Graphics.OpenGL4.TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)OpenTK.Graphics.OpenGL4.TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
});
}
else
{
// TODO: throw new exception, although not necessarily - it's already implemented in ImageResult.FromResult
}
// explicitly destroy I/O stream object
io.Dispose();
return(texture);
}
private List <MeshTexture> LoadMaterialTextures(Material mat, TextureType type, string typeName)
{
var textures = new List <MeshTexture>();
for (int i = 0; i < mat.GetMaterialTextureCount(type); i++)
{
mat.GetMaterialTexture(type, i, out TextureSlot slot);
var texLoaded = TexturesLoaded.Find((t) => { return(t.Path == slot.FilePath); });
if (texLoaded == null)
{
MeshTexture texture = TextureFromFile(slot.FilePath, Directory, typeName);
textures.Add(texture);
TexturesLoaded.Add(texture); // add to loaded textures
}
else
{
textures.Add(texLoaded);
}
}
return(textures);
}
