/// <overloads>
/// <summary>
/// Initializes a new instance of the <see cref="Image"/> class.
/// </summary>
/// </overloads>
///
/// <summary>
/// Initializes a new, empty instance of the <see cref="Image"/> class.
/// </summary>
/// <param name="width">The width in pixels.</param>
/// <param name="height">The height in pixels.</param>
/// <param name="format">The texture format.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="width"/> or <paramref name="height"/> is 0 or negative.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="format"/> is invalid.
/// </exception>
public Image(int width, int height, DataFormat format)
{
if (width <= 0)
{
throw new ArgumentOutOfRangeException("width", "Image size must not be negative or 0.");
}
if (height <= 0)
{
throw new ArgumentOutOfRangeException("height", "Image size must not be negative or 0.");
}
if (!TextureHelper.IsValid(format))
{
throw new ArgumentException("Invalid texture format.", "format");
}
int rowPitch, slicePitch;
TextureHelper.ComputePitch(format, width, height, out rowPitch, out slicePitch);
Width = width;
Height = height;
Format = format;
RowPitch = rowPitch;
_data = new byte[slicePitch];
}
/// <summary>
/// Initializes a new instance of the <see cref="Image"/> class with the specified data.
/// </summary>
/// <param name="width">The width in pixels.</param>
/// <param name="height">The height in pixels.</param>
/// <param name="format">The texture format.</param>
/// <param name="data">The contents of the image.</param>
/// <exception cref="ArgumentException">
/// <paramref name="format"/> is invalid, or <paramref name="data"/> has wrong size.
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="data"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="width"/> or <paramref name="height"/>is 0 or negative.
/// </exception>
public Image(int width, int height, DataFormat format, byte[] data)
{
if (width <= 0)
{
throw new ArgumentOutOfRangeException("width", "Image size must not be negative or 0.");
}
if (height <= 0)
{
throw new ArgumentOutOfRangeException("height", "Image size must not be negative or 0.");
}
if (!TextureHelper.IsValid(format))
{
throw new ArgumentException("Invalid texture format.", "format");
}
if (data == null)
{
throw new ArgumentNullException("data");
}
int rowPitch, slicePitch;
TextureHelper.ComputePitch(format, width, height, out rowPitch, out slicePitch);
if (data.Length != slicePitch)
{
throw new ArgumentException(string.Format("Buffer has invalid size. Expected size: {0} bytes; Actual size: {1}", slicePitch, data.Length));
}
Width = width;
Height = height;
Format = format;
RowPitch = rowPitch;
_data = data;
}
/// <summary>
/// Validates the texture.
/// </summary>
/// <param name="description">The texture description.</param>
/// <exception cref="ArgumentException">
/// The <paramref name="description"/> is invalid.
/// </exception>
/// <exception cref="NotSupportedException">
/// The specified format is not supported.
/// </exception>
private static void ValidateTexture(TextureDescription description)
{
if (!TextureHelper.IsValid(description.Format))
throw new ArgumentException("The specified texture format is not supported.", "description");
if (TextureHelper.IsPalettized(description.Format))
throw new ArgumentException("Palettized texture formats are not supported.", "description");
switch (description.Dimension)
{
case TextureDimension.Texture1D:
if (description.Width <= 0 || description.Height != 1 || description.Depth != 1 || description.ArraySize <= 0)
throw new ArgumentException("Invalid texture description.", "description");
//if (TextureHelper.IsVideo(description.Format))
// throw new NotSupportedException("Video formats are not supported.");
if (!TextureHelper.ValidateMipLevels(description.Width, 1, description.MipLevels))
throw new ArgumentException("Invalid number of mipmap levels.", "description");
break;
case TextureDimension.Texture2D:
case TextureDimension.TextureCube:
if (description.Width <= 0 || description.Height <= 0 || description.Depth != 1 || description.ArraySize <= 0)
throw new ArgumentException("Invalid texture description.", "description");
if (description.Dimension == TextureDimension.TextureCube)
{
if ((description.ArraySize % 6) != 0)
throw new ArgumentException("All six faces need to be specified for cube maps.", "description");
//if (TextureHelper.IsVideo(description.Format))
// throw new NotSupportedException("Video formats are not supported.");
}
if (!TextureHelper.ValidateMipLevels(description.Width, description.Height, description.MipLevels))
throw new ArgumentException("Invalid number of mipmaps levels.", "description");
break;
case TextureDimension.Texture3D:
if (description.Width <= 0 || description.Height <= 0 || description.Depth <= 0 || description.ArraySize != 1)
throw new ArgumentException("Invalid texture description.", "description");
//if (TextureHelper.IsVideo(description.Format) || TextureHelper.IsPlanar(description.Format)
// || TextureHelper.IsDepthStencil(description.Format))
// throw new NotSupportedException("The specified texture format is not supported.");
if (!TextureHelper.ValidateMipLevels(description.Width, description.Height, description.Depth, description.MipLevels))
throw new ArgumentException("Invalid number of mipmaps levels.", "description");
break;
default:
throw new NotSupportedException("The specified texture dimension is not supported.");
}
}