/// <summary>
/// Calculates the number of miplevels for a Texture 2D.
/// </summary>
/// <param name="width">The width of the texture.</param>
/// <param name="height">The height of the texture.</param>
/// <param name="depth">The depth of the texture.</param>
/// <param name="mipLevels">A <see cref="MipMapCount"/>, set to true to calculates all mipmaps, to false to calculate only 1 miplevel, or > 1 to calculate a specific amount of levels.</param>
/// <returns>The number of miplevels.</returns>
public static int CalculateMipLevels(int width, int height, int depth, MipMapCount mipLevels)
{
if (mipLevels > 1)
{
if (!IsPow2(width) || !IsPow2(height) || !IsPow2(depth))
{
throw new InvalidOperationException("Width/Height/Depth must be power of 2");
}
int maxMips = CountMips(width, height, depth);
if (mipLevels > maxMips)
{
throw new InvalidOperationException(String.Format("MipLevels must be <= {0}", maxMips));
}
}
else if (mipLevels == 0)
{
if (!IsPow2(width) || !IsPow2(height) || !IsPow2(depth))
{
throw new InvalidOperationException("Width/Height/Depth must be power of 2");
}
mipLevels = CountMips(width, height, depth);
}
else
{
mipLevels = 1;
}
return(mipLevels);
}
/// <summary>
/// Calculates the number of miplevels for a Texture 2D.
/// </summary>
/// <param name="width">The width of the texture.</param>
/// <param name="height">The height of the texture.</param>
/// <param name="mipLevels">A <see cref="MipMapCount"/>, set to true to calculates all mipmaps, to false to calculate only 1 miplevel, or > 1 to calculate a specific amount of levels.</param>
/// <returns>The number of miplevels.</returns>
public static int CalculateMipLevels(int width, int height, MipMapCount mipLevels)
{
if (mipLevels > 1)
{
int maxMips = CountMips(width, height);
if (mipLevels > maxMips)
{
throw new InvalidOperationException(String.Format("MipLevels must be <= {0}", maxMips));
}
}
else if (mipLevels == 0)
{
mipLevels = CountMips(width, height);
}
else
{
mipLevels = 1;
}
return(mipLevels);
}
/// <summary>
/// Creates a new instance of a 3D <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="depth">The depth.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <param name="dataPointer">Pointer to an existing buffer.</param>
/// <returns>A new image.</returns>
public static Image New3D(int width, int height, int depth, MipMapCount mipMapCount, PixelFormat format, IntPtr dataPointer)
{
return(new Image(CreateDescription(TextureDimension.Texture3D, width, width, depth, mipMapCount, format, 1), dataPointer, 0, null, false));
}
private static ImageDescription CreateDescription(TextureDimension dimension, int width, int height, int depth, MipMapCount mipMapCount, PixelFormat format, int arraySize)
{
return(new ImageDescription()
{
Width = width,
Height = height,
Depth = depth,
ArraySize = arraySize,
Dimension = dimension,
Format = format,
MipLevels = mipMapCount,
});
}
/// <summary>
/// Creates a new instance of a Cube <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <param name="dataPointer">Pointer to an existing buffer.</param>
/// <returns>A new image.</returns>
public static Image NewCube(int width, MipMapCount mipMapCount, PixelFormat format, IntPtr dataPointer)
{
return(new Image(CreateDescription(TextureDimension.TextureCube, width, width, 1, mipMapCount, format, 6), dataPointer, 0, null, false));
}
/// <summary>
/// Creates a new instance of a 2D <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <param name="arraySize">Size of the array.</param>
/// <param name="dataPointer">Pointer to an existing buffer.</param>
/// <returns>A new image.</returns>
public static Image New2D(int width, int height, MipMapCount mipMapCount, PixelFormat format, int arraySize, IntPtr dataPointer)
{
return(new Image(CreateDescription(TextureDimension.Texture2D, width, height, 1, mipMapCount, format, arraySize), dataPointer, 0, null, false));
}
/// <summary>
/// Creates a new instance of a 3D <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="depth">The depth.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <returns>A new image.</returns>
public static Image New3D(int width, int height, int depth, MipMapCount mipMapCount, PixelFormat format)
{
return(New3D(width, height, depth, mipMapCount, format, IntPtr.Zero));
}
/// <summary>
/// Creates a new instance of a Cube <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <returns>A new image.</returns>
public static Image NewCube(int width, MipMapCount mipMapCount, PixelFormat format)
{
return(NewCube(width, mipMapCount, format, IntPtr.Zero));
}
/// <summary>
/// Creates a new instance of a 2D <see cref="Image"/>.
/// </summary>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="mipMapCount">The mip map count.</param>
/// <param name="format">The format.</param>
/// <param name="arraySize">Size of the array.</param>
/// <returns>A new image.</returns>
public static Image New2D(int width, int height, MipMapCount mipMapCount, PixelFormat format, int arraySize = 1)
{
return(New2D(width, height, mipMapCount, format, arraySize, IntPtr.Zero));
}