|
|
#region License
|
|
|
/* FNA - XNA4 Reimplementation for Desktop Platforms
|
|
|
* Copyright 2009-2020 Ethan Lee and the MonoGame Team
|
|
|
*
|
|
|
* Released under the Microsoft Public License.
|
|
|
* See LICENSE for details.
|
|
|
*/
|
|
|
#endregion
|
|
|
|
|
|
#region Using Statements
|
|
|
using System;
|
|
|
#endregion
|
|
|
|
|
|
namespace Microsoft.Xna.Framework.Graphics
|
|
|
{
|
|
|
public abstract class Texture : GraphicsResource
|
|
|
{
|
|
|
#region Public Properties
|
|
|
|
|
|
public SurfaceFormat Format
|
|
|
{
|
|
|
get;
|
|
|
protected set;
|
|
|
}
|
|
|
|
|
|
public int LevelCount
|
|
|
{
|
|
|
get;
|
|
|
protected set;
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Internal Variables
|
|
|
|
|
|
internal IGLTexture texture;
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Protected Dispose Method
|
|
|
|
|
|
protected override void Dispose(bool disposing)
|
|
|
{
|
|
|
if (!IsDisposed)
|
|
|
{
|
|
|
GraphicsDevice.GLDevice.AddDisposeTexture(texture);
|
|
|
}
|
|
|
base.Dispose(disposing);
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Internal Context Reset Method
|
|
|
|
|
|
internal protected override void GraphicsDeviceResetting()
|
|
|
{
|
|
|
// FIXME: Do we even want to bother with DeviceResetting for GL? -flibit
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Static SurfaceFormat Size Method
|
|
|
|
|
|
internal static int GetFormatSize(SurfaceFormat format)
|
|
|
{
|
|
|
switch (format)
|
|
|
{
|
|
|
case SurfaceFormat.Dxt1:
|
|
|
return 8;
|
|
|
case SurfaceFormat.Dxt3:
|
|
|
case SurfaceFormat.Dxt5:
|
|
|
return 16;
|
|
|
case SurfaceFormat.Alpha8:
|
|
|
return 1;
|
|
|
case SurfaceFormat.Bgr565:
|
|
|
case SurfaceFormat.Bgra4444:
|
|
|
case SurfaceFormat.Bgra5551:
|
|
|
case SurfaceFormat.HalfSingle:
|
|
|
case SurfaceFormat.NormalizedByte2:
|
|
|
return 2;
|
|
|
case SurfaceFormat.Color:
|
|
|
case SurfaceFormat.Single:
|
|
|
case SurfaceFormat.Rg32:
|
|
|
case SurfaceFormat.HalfVector2:
|
|
|
case SurfaceFormat.NormalizedByte4:
|
|
|
case SurfaceFormat.Rgba1010102:
|
|
|
case SurfaceFormat.ColorBgraEXT:
|
|
|
return 4;
|
|
|
case SurfaceFormat.HalfVector4:
|
|
|
case SurfaceFormat.Rgba64:
|
|
|
case SurfaceFormat.Vector2:
|
|
|
return 8;
|
|
|
case SurfaceFormat.Vector4:
|
|
|
return 16;
|
|
|
default:
|
|
|
throw new ArgumentException("Should be a value defined in SurfaceFormat", "Format");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
internal static int GetPixelStoreAlignment(SurfaceFormat format)
|
|
|
{
|
|
|
/*
|
|
|
* https://github.com/FNA-XNA/FNA/pull/238
|
|
|
* https://www.khronos.org/registry/OpenGL/specs/gl/glspec21.pdf
|
|
|
* OpenGL 2.1 Specification, section 3.6.1, table 3.1 specifies that the pixelstorei alignment cannot exceed 8
|
|
|
*/
|
|
|
return Math.Min(8, GetFormatSize(format));
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Static Mipmap Level Calculator
|
|
|
|
|
|
internal static int CalculateMipLevels(
|
|
|
int width,
|
|
|
int height = 0,
|
|
|
int depth = 0
|
|
|
) {
|
|
|
int levels = 1;
|
|
|
for (
|
|
|
int size = Math.Max(Math.Max(width, height), depth);
|
|
|
size > 1;
|
|
|
levels += 1
|
|
|
) {
|
|
|
size /= 2;
|
|
|
}
|
|
|
return levels;
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
}
|
|
|
}
|
|
|
|
