/// <summary>
/// Function to retrieve a texture view.
/// </summary>
/// <param name="format">Format of the view.</param>
/// <param name="firstMip">First mip level for the view.</param>
/// <param name="mipCount">Number of mip levels to view.</param>
/// <param name="arrayIndex">First array index for the view.</param>
/// <param name="arrayCount">Number of array indices to view.</param>
/// <returns>The cached texture shader view.</returns>
public GorgonTextureShaderView GetTextureView(BufferFormat format,
int firstMip,
int mipCount,
int arrayIndex,
int arrayCount)
{
var buffer = (GorgonTexture)_resource;
var key = new ViewKey(format,
firstMip,
mipCount,
buffer.ResourceType != ResourceType.Texture3D ? arrayIndex : -1,
buffer.ResourceType != ResourceType.Texture3D ? arrayCount : -1,
buffer.Settings.IsTextureCube);
lock (_syncLock)
{
GorgonTextureShaderView result;
if (_textureViews.TryGetValue(key, out result))
{
return(result);
}
result = new GorgonTextureShaderView(buffer,
format,
firstMip,
mipCount,
buffer.ResourceType != ResourceType.Texture3D ? arrayIndex : -1,
buffer.ResourceType != ResourceType.Texture3D ? arrayCount : -1);
result.Initialize();
_textureViews.Add(key, result);
return(result);
}
}
/// <summary>
/// Function to convert this view into its attached 3D texture.
/// </summary>
/// <param name="view">View to convert.</param>
/// <returns>The texture attached to the view.</returns>
/// <exception cref="System.InvalidCastException">Thrown when the view is not attached to a 3D texture.</exception>
public static GorgonTexture3D ToTexture3D(GorgonTextureShaderView view)
{
if (view._texture3D == null)
{
throw new InvalidCastException(string.Format(Resources.GORGFX_VIEW_RESOURCE_NOT_TEXTURE, "3D"));
}
return(view._texture3D);
}
