/// <summary>
/// Query OpenGL implementation extensions.
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
internal static GraphicsCapabilities Query()
{
GraphicsCapabilities graphicsCapabilities = new GraphicsCapabilities();
// OpenGL extensions
graphicsCapabilities._GlExtensions = Gl.CurrentExtensions;
// Platform OpenGL extensions
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
graphicsCapabilities._WglExtensions = Wgl.CurrentExtensions;
graphicsCapabilities._EglExtensions = Egl.CurrentExtensions;
break;
case PlatformID.Unix:
graphicsCapabilities._GlxExtensions = Glx.CurrentExtensions;
break;
case PlatformID.MacOSX:
graphicsCapabilities._EglExtensions = Egl.CurrentExtensions;
break;
}
// Query implementation limits
graphicsCapabilities._GraphicsLimits = Gl.CurrentLimits;
return(graphicsCapabilities);
}
/// <summary>
/// Construct a PlatformExtensions specifying the GraphicsCapabilities which it belongs to.
/// </summary>
/// <param name="caps"></param>
internal PlatformExtensionsCollection(GraphicsCapabilities caps)
{
if (caps == null)
{
throw new ArgumentNullException("caps");
}
_GraphicsCapabilities = caps;
}
/// <summary>
/// Clone this GraphicsCapabilities.
/// </summary>
/// <returns></returns>
public GraphicsCapabilities Clone()
{
GraphicsCapabilities clone = (GraphicsCapabilities)MemberwiseClone();
clone._GlExtensions = _GlExtensions.Clone();
clone._WglExtensions = _WglExtensions.Clone();
clone._GlxExtensions = _GlxExtensions.Clone();
return(clone);
}
/// <summary>
/// Query OpenGL implementation extensions.
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
public static GraphicsCapabilities Query(GraphicsContext ctx, IDeviceContext deviceContext)
{
GraphicsCapabilities graphicsCapabilities = new GraphicsCapabilities();
FieldInfo[] capsFields = typeof(GraphicsCapabilities).GetFields(BindingFlags.Public | BindingFlags.Instance);
#region Platform Extension Reload
// Since at this point there's a current OpenGL context, it's possible to use
// {glx|wgl}GetExtensionsString to retrieve platform specific extensions
switch (Environment.OSVersion.Platform) {
case PlatformID.Win32NT:
case PlatformID.Win32Windows:
case PlatformID.Win32S:
case PlatformID.WinCE:
Wgl.SyncDelegates();
break;
}
#endregion
// Only boolean fields are considered
FieldInfo[] extsFields = Array.FindAll<FieldInfo>(capsFields, delegate(FieldInfo info) {
return (info.FieldType == typeof(bool));
});
foreach (FieldInfo field in extsFields) {
Attribute[] graphicsExtensionAttributes = Attribute.GetCustomAttributes(field, typeof(GraphicsExtensionAttribute));
GraphicsExtensionDisabledAttribute graphicsExtensionDisabled = (GraphicsExtensionDisabledAttribute)Attribute.GetCustomAttribute(field, typeof(GraphicsExtensionDisabledAttribute));
bool implemented = false;
// Check whether at least one extension is implemented
implemented = Array.Exists(graphicsExtensionAttributes, delegate(Attribute item) {
return ((GraphicsExtensionAttribute)item).IsSupported(ctx, deviceContext);
});
// Check whether the required extensions are artifically disabled
if (graphicsExtensionDisabled != null)
implemented = false;
field.SetValue(graphicsCapabilities, implemented);
}
return (graphicsCapabilities);
}
/// <summary>
/// Query OpenGL implementation extensions.
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
public static GraphicsCapabilities Query(GraphicsContext ctx, IDeviceContext deviceContext)
{
GraphicsCapabilities graphicsCapabilities = new GraphicsCapabilities();
KhronosApi.LogComment("Query OpenGL extensions.");
#region Platform Extension Reload
// Since at this point there's a current OpenGL context, it's possible to use
// {glx|wgl}GetExtensionsString to retrieve platform specific extensions
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
case PlatformID.Win32Windows:
case PlatformID.Win32S:
case PlatformID.WinCE:
// Wgl.SyncDelegates();
break;
}
#endregion
// OpenGL extensions
graphicsCapabilities._GlExtensions.Query();
// Windows OpenGL extensions
WindowsDeviceContext windowsDeviceContext = deviceContext as WindowsDeviceContext;
if (windowsDeviceContext != null)
{
graphicsCapabilities._WglExtensions.Query(windowsDeviceContext);
}
// GLX OpenGL extensions
XServerDeviceContext xserverDeviceContext = deviceContext as XServerDeviceContext;
if (xserverDeviceContext != null)
{
graphicsCapabilities._GlxExtensions.Query(xserverDeviceContext);
}
// Query implementation limits
graphicsCapabilities._GraphicsLimits = GraphicsLimits.Query(graphicsCapabilities._GlExtensions);
return(graphicsCapabilities);
}
/// <summary>
/// Query OpenGL implementation extensions.
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
public static GraphicsCapabilities Query(GraphicsContext ctx, IDeviceContext deviceContext)
{
GraphicsCapabilities graphicsCapabilities = new GraphicsCapabilities();
KhronosApi.LogComment("Query OpenGL extensions.");
#region Platform Extension Reload
// Since at this point there's a current OpenGL context, it's possible to use
// {glx|wgl}GetExtensionsString to retrieve platform specific extensions
switch (Environment.OSVersion.Platform) {
case PlatformID.Win32NT:
case PlatformID.Win32Windows:
case PlatformID.Win32S:
case PlatformID.WinCE:
// Wgl.SyncDelegates();
break;
}
#endregion
// OpenGL extensions
graphicsCapabilities._GlExtensions.Query();
// Windows OpenGL extensions
WindowsDeviceContext windowsDeviceContext = deviceContext as WindowsDeviceContext;
if (windowsDeviceContext != null)
graphicsCapabilities._WglExtensions.Query(windowsDeviceContext);
// GLX OpenGL extensions
XServerDeviceContext xserverDeviceContext = deviceContext as XServerDeviceContext;
if (xserverDeviceContext != null)
graphicsCapabilities._GlxExtensions.Query(xserverDeviceContext);
// Query implementation limits
graphicsCapabilities._GraphicsLimits = GraphicsLimits.Query(graphicsCapabilities._GlExtensions);
return (graphicsCapabilities);
}
/// <summary>
/// Check whether the texture extents are compatible with context capabilities.
/// </summary>
/// <param name="caps">
/// A <see cref="GraphicsCapabilities"/> determining the underlying texture capabilities.
/// </param>
/// <param name="width">
/// A <see cref="UInt32"/> that specify the texture width.
/// </param>
/// <param name="height">
/// A <see cref="UInt32"/> that specify the texture height.
/// </param>
/// <param name="depth">
/// A <see cref="UInt32"/> that specify the texture depth.
/// </param>
/// <param name="format">
/// A <see cref="OpenGL.PixelLayout"/> that specify the texture internal format.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception throw if <paramref name="caps"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="width"/>, <paramref name="height"/> or <paramref name="depth"/> is greater than
/// the maximum allowed for the specific texture target.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if NPOT texture are not supported by <paramref name="caps"/>, and <paramref name="width"/>, <paramref name="height"/>
/// or <paramref name="depth"/> is not a power-of-two value.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="format"/> is not a supported internal format.
/// </exception>
private void CheckCapabilities(GraphicsCapabilities caps, uint width, uint height, uint depth, PixelLayout format)
{
if (caps == null)
throw new ArgumentNullException("caps");
if (caps.GlExtensions == null)
throw new ArgumentException("caps GL extensions not queried", "caps");
if (caps.Limits == null)
throw new ArgumentException("caps Limits not queried", "caps");
// Texture maximum size
switch (TextureTarget) {
case TextureTarget.Texture1d:
if (width > caps.Limits.MaxTexture2DSize)
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
break;
case TextureTarget.Texture2d:
if (width > caps.Limits.MaxTexture2DSize)
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
if (height > caps.Limits.MaxTexture2DSize)
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
break;
case TextureTarget.TextureRectangle:
if (width > caps.Limits.MaxTextureRectSize)
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTextureRectSize));
if (height > caps.Limits.MaxTextureRectSize)
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTextureRectSize));
break;
case TextureTarget.Texture3d:
if (width > caps.Limits.MaxTexture3DSize)
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
if (height > caps.Limits.MaxTexture3DSize)
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
if (depth > caps.Limits.MaxTexture3DSize)
throw new ArgumentException(String.Format("depth greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
break;
case TextureTarget.TextureCubeMap:
if (width > caps.Limits.MaxTextureCubeSize)
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTextureCubeSize));
if (height > caps.Limits.MaxTextureCubeSize)
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTextureCubeSize));
break;
default:
throw new NotImplementedException("not implemented checks on texture " + GetType());
}
// Texture not-power-of-two
if (caps.GlExtensions.TextureNonPowerOfTwo_ARB == false) {
if (IsPowerOfTwo(width) == false)
throw new ArgumentException(String.Format("NPOT texture width not supported (width is {0})", width));
if (IsPowerOfTwo(height) == false)
throw new ArgumentException(String.Format("NPOT texture height not supported (height is {0})", height));
if (IsPowerOfTwo(depth) == false)
throw new ArgumentException(String.Format("NPOT texture depth not supported (height is {0})", height));
}
// Texture internal format
if (Pixel.IsSupportedInternalFormat(format) == false)
throw new ArgumentException(String.Format("not supported texture internal format {0}", format), "format");
}
/// <summary>
/// Check whether the texture extents are compatible with context capabilities.
/// </summary>
/// <param name="caps">
/// A <see cref="GraphicsCapabilities"/> determining the underlying texture capabilities.
/// </param>
/// <param name="width">
/// A <see cref="UInt32"/> that specify the texture width.
/// </param>
/// <param name="height">
/// A <see cref="UInt32"/> that specify the texture height.
/// </param>
/// <param name="depth">
/// A <see cref="UInt32"/> that specify the texture depth.
/// </param>
/// <param name="format">
/// A <see cref="OpenGL.PixelLayout"/> that specify the texture internal format.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception throw if <paramref name="caps"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="width"/>, <paramref name="height"/> or <paramref name="depth"/> is greater than
/// the maximum allowed for the specific texture target.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if NPOT texture are not supported by <paramref name="caps"/>, and <paramref name="width"/>, <paramref name="height"/>
/// or <paramref name="depth"/> is not a power-of-two value.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="format"/> is not a supported internal format.
/// </exception>
private void CheckCapabilities(GraphicsCapabilities caps, uint width, uint height, uint depth, PixelLayout format)
{
if (caps == null)
{
throw new ArgumentNullException("caps");
}
if (caps.GlExtensions == null)
{
throw new ArgumentException("caps GL extensions not queried", "caps");
}
if (caps.Limits == null)
{
throw new ArgumentException("caps Limits not queried", "caps");
}
// Texture maximum size
switch (TextureTarget)
{
case TextureTarget.Texture1d:
if (width > caps.Limits.MaxTexture2DSize)
{
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
}
break;
case TextureTarget.Texture2d:
if (width > caps.Limits.MaxTexture2DSize)
{
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
}
if (height > caps.Limits.MaxTexture2DSize)
{
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTexture2DSize));
}
break;
case TextureTarget.TextureRectangle:
if (width > caps.Limits.MaxTextureRectSize)
{
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTextureRectSize));
}
if (height > caps.Limits.MaxTextureRectSize)
{
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTextureRectSize));
}
break;
case TextureTarget.Texture3d:
if (width > caps.Limits.MaxTexture3DSize)
{
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
}
if (height > caps.Limits.MaxTexture3DSize)
{
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
}
if (depth > caps.Limits.MaxTexture3DSize)
{
throw new ArgumentException(String.Format("depth greater than maximum allowed ({0})", caps.Limits.MaxTexture3DSize));
}
break;
case TextureTarget.TextureCubeMap:
if (width > caps.Limits.MaxTextureCubeSize)
{
throw new ArgumentException(String.Format("width greater than maximum allowed ({0})", caps.Limits.MaxTextureCubeSize));
}
if (height > caps.Limits.MaxTextureCubeSize)
{
throw new ArgumentException(String.Format("height greater than maximum allowed ({0})", caps.Limits.MaxTextureCubeSize));
}
break;
default:
throw new NotImplementedException("not implemented checks on texture " + GetType());
}
// Texture not-power-of-two
if (caps.GlExtensions.TextureNonPowerOfTwo_ARB == false)
{
if (IsPowerOfTwo(width) == false)
{
throw new ArgumentException(String.Format("NPOT texture width not supported (width is {0})", width));
}
if (IsPowerOfTwo(height) == false)
{
throw new ArgumentException(String.Format("NPOT texture height not supported (height is {0})", height));
}
if (IsPowerOfTwo(depth) == false)
{
throw new ArgumentException(String.Format("NPOT texture depth not supported (height is {0})", height));
}
}
// Texture internal format
if (Pixel.IsSupportedInternalFormat(format) == false)
{
throw new ArgumentException(String.Format("not supported texture internal format {0}", format), "format");
}
}
/// <summary>
/// Construct a PlatformExtensions specifying the GraphicsCapabilities which it belongs to.
/// </summary>
/// <param name="caps"></param>
internal PlatformExtensionsCollection(GraphicsCapabilities caps)
{
if (caps == null)
throw new ArgumentNullException("caps");
_GraphicsCapabilities = caps;
}
