/// <summary>
/// Create the texture, using this technique.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public override void Create(GraphicsContext ctx)
{
int internalFormat = Pixel.GetGlInternalFormat(_PixelFormat, ctx);
uint width = _Images[0].Width, height = _Images[0].Height;
Gl.TexImage3D(_Target, 0, internalFormat, (int)width, (int)height, _Images.Length, 0, /* Unused */ OpenGL.PixelFormat.Red, /* Unused */ PixelType.UnsignedByte, IntPtr.Zero);
for (int i = 0; i < _Images.Length; i++)
{
Image image = _Images[i];
PixelFormat format = Pixel.GetGlFormat(image.PixelLayout);
PixelType type = Pixel.GetPixelType(image.PixelLayout);
// Set pixel transfer
foreach (int alignment in new int[] { 8, 4, 2, 1 })
{
if ((image.Stride % alignment) != 0)
{
continue;
}
Gl.PixelStore(PixelStoreParameter.UnpackAlignment, alignment);
break;
}
// Upload texture contents
Gl.TexSubImage3D(_Target, 0, 0, 0, i, (int)width, (int)height, 1, format, type, image.ImageBuffer);
}
// Define texture properties
_Texture3d.DefineExtents(_PixelFormat, width, height, (uint)_Images.Length, 0);
}
/// <summary>
/// Create the texture, using this technique.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public override void Create(GraphicsContext ctx)
{
PixelFormat format = Pixel.GetGlFormat(_PixelFormat);
int internalFormat = Pixel.GetGlInternalFormat(_PixelFormat, ctx);
// Define empty texture
Gl.TexImage3D(_Target, (int)_Level, internalFormat, (int)_Width, (int)_Height, (int)_Depth, 0, format, /* Unused */ PixelType.UnsignedByte, null);
// Define texture properties
_Texture3d.DefineExtents(_PixelFormat, _Width, _Height, _Depth, _Level);
}