/// <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);
PixelFormat format = Pixel.GetGlFormat(_PixelFormat);
// Define empty texture
Gl.TexImage3D(_Target, 0, internalFormat, (int)_Width, (int)_Height, (int)_Layers, 0, format, /* Unused */ PixelType.UnsignedByte, IntPtr.Zero);
// Define texture properties
_TextureArray2d.DefineExtents(_PixelFormat, _Width, _Height, 1, 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)
{
int internalFormat = Pixel.GetGlInternalFormat(_PixelFormat, ctx);
// Define texture storage, if required
if (_ResetLayers)
{
Gl.TexImage3D(_Target, 0, internalFormat, (int)_Images[0].Width, (int)_Images[0].Height, _Images.Length, 0, /* Unused */ OpenGL.PixelFormat.Rgb, /* Unused */ PixelType.UnsignedByte, IntPtr.Zero);
}
// Define array layers
uint width = 0, height = 0;
for (int layer = 0; layer < _Images.Length; layer++)
{
// Allow partial definition
if (_Images[layer] == null)
{
continue;
}
PixelFormat format = Pixel.GetGlFormat(_Images[layer].PixelLayout);
PixelType type = Pixel.GetPixelType(_Images[layer].PixelLayout);
// Set pixel transfer
foreach (int alignment in new int[] { 8, 4, 2, 1 })
{
if ((_Images[layer].Stride % alignment) != 0)
{
continue;
}
Gl.PixelStore(PixelStoreParameter.UnpackAlignment, alignment);
break;
}
width = _Images[layer].Width;
height = _Images[layer].Height;
// Upload texture contents
Gl.TexSubImage3D(_Target, 0, 0, 0, layer, (int)_Images[layer].Width, (int)_Images[layer].Height, 1, format, type, _Images[layer].ImageBuffer);
}
// Define texture properties
if (_ResetLayers)
{
_TextureArray2d.DefineExtents(_PixelFormat, _Images[0].Width, _Images[0].Height, 1, 0);
}
}
