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https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 06:15:29 +00:00
Updated documentation and renamed Imports.import to Imports.FunctionMap for clarity.
This commit is contained in:
the_fiddler
parent
58d5b7838a
commit
62a15f3f9c
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@ -29,31 +29,21 @@ namespace OpenTK.OpenGL
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/// </summary>
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/// <remarks>
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/// <para>
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/// OpenTK.OpenGL.GL contains all OpenGL enums and functions defined in the 2.1 specification.
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/// This class contains all OpenGL enums and functions defined in the 2.1 specification.
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/// The official .spec files can be found at: http://opengl.org/registry/.
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/// </para>
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/// <para>
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/// OpenTK.OpenGL.GL relies on static initialization to obtain the entry points for OpenGL functions.
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/// Please ensure that a valid OpenGL context has been made current in the pertinent thread <b>before</b>
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/// any OpenGL functions are called (toolkits like GLUT, SDL or GLFW will automatically take care of
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/// the context initialization process). Without a valid OpenGL context, OpenTK.OpenGL.GL will only be able
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/// to retrieve statically exported entry points (typically corresponding to OpenGL version 1.1 under Windows,
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/// 1.3 under Linux and 1.4 under Windows Vista), and extension methods will need to be loaded manually.
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/// A valid OpenGL context must be created before calling any OpenGL function.
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/// </para>
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/// <para>
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/// If you prefer not to rely on static initialisation for the Gl class, you can use the
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/// ReloadFunctions or ReloadFunction methods to manually force the initialisation of OpenGL entry points.
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/// The ReloadFunctions method should be called whenever you change an existing visual or pixelformat. This
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/// generally happens when you change the color/stencil/depth buffer associated with a window (but probably
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/// not the resolution). This may or may not be necessary under Linux/MacOS, but is generally required for
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/// Windows.
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/// </para>
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/// Use the GL.Load and GL.LoadAll methods to prepare function entry points prior to use. To maintain
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/// cross-platform compatibility, this must be done for both core and extension functions. The GameWindow
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/// and the GLControl class will take care of this automatically.
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/// <para>
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/// You can use the Gl.IsExtensionSupported method to check whether any given category of extension functions
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/// exists in the current OpenGL context. The results can be cached to speed up future searches.
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/// Keep in mind that different OpenGL contexts may support different extensions, and under different entry
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/// points. Always check if all required extensions are still supported when changing visuals or pixel
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/// formats.
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/// You can use the GL.SupportsExtension method to check whether any given category of extension functions
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/// exists in the current OpenGL context. Keep in mind that different OpenGL contexts may support different
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/// extensions, and under different entry points. Always check if all required extensions are still supported
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/// when changing visuals or pixel formats.
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/// </para>
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/// <para>
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/// You may retrieve the entry point for an OpenGL function using the GL.GetDelegate method.
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@ -68,47 +58,54 @@ namespace OpenTK.OpenGL
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/// </remarks>
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public static partial class GL
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{
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static StringBuilder sb = new StringBuilder();
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static object gl_lock = new object();
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static GL()
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{
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assembly = Assembly.GetExecutingAssembly();//Assembly.Load("OpenTK.OpenGL");
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glClass = assembly.GetType("OpenTK.OpenGL.GL");
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delegatesClass = glClass.GetNestedType("Delegates", BindingFlags.Static | BindingFlags.NonPublic);
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importsClass = glClass.GetNestedType("Imports", BindingFlags.Static | BindingFlags.NonPublic);
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}
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internal static partial class Imports
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{
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internal static SortedList<string, MethodInfo> import; // This is faster than either Dictionary or SortedDictionary
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static Imports()
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{
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MethodInfo[] methods = importsClass.GetMethods(BindingFlags.Static | BindingFlags.NonPublic);
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import = new SortedList<string, MethodInfo>(methods.Length);
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foreach (MethodInfo m in methods)
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{
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import.Add(m.Name, m);
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}
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}
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}
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#region --- Fields ---
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internal const string Library = "opengl32.dll";
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//private static Dictionary<string, bool> AvailableExtensions = new Dictionary<string, bool>();
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static StringBuilder sb = new StringBuilder();
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static object gl_lock = new object();
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private static SortedList<string, bool> AvailableExtensions = new SortedList<string, bool>();
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private static bool rebuildExtensionList;
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private static Assembly assembly;
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private static Type glClass;
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private static Type delegatesClass;
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private static Type importsClass;
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private static FieldInfo[] delegates;
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#endregion
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#region --- Constructor ---
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static GL()
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{
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glClass = typeof(GL);
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delegatesClass = glClass.GetNestedType("Delegates", BindingFlags.Static | BindingFlags.NonPublic);
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importsClass = glClass.GetNestedType("Imports", BindingFlags.Static | BindingFlags.NonPublic);
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}
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#endregion
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#region --- Imports ---
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internal static partial class Imports
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{
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internal static SortedList<string, MethodInfo> FunctionMap; // This is faster than either Dictionary or SortedDictionary
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static Imports()
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{
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MethodInfo[] methods = importsClass.GetMethods(BindingFlags.Static | BindingFlags.NonPublic);
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FunctionMap = new SortedList<string, MethodInfo>(methods.Length);
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foreach (MethodInfo m in methods)
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{
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FunctionMap.Add(m.Name, m);
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}
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}
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}
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#endregion
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#region --- Methods ---
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#region public static bool SupportsExtension(string name)
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/// <summary>
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@ -136,105 +133,6 @@ namespace OpenTK.OpenGL
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#endregion
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#region private static void BuildExtensionList()
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/// <summary>
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/// Builds a cache of the supported extensions to speed up searches.
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/// </summary>
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private static void BuildExtensionList()
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{
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// Assumes there is an opengl context current.
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AvailableExtensions.Clear();
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string version_string = GL.GetString(StringName.Version);
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if (String.IsNullOrEmpty(version_string))
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{
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throw new ApplicationException("Failed to build extension list. Is there an opengl context current?");
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}
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string version;
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// Most drivers return the version in the 3 first characters of the version string,
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// (e.g. on Ati X1950 with Catalyst 7.10 -> "2.0.6956 Release"). However, Mesa seems
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// to do something strange: "1.4 (2.1 Mesa 7.0.1).".
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// We'll do some trickery to get the second number (2.1), but this may break on
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// some implementations...
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if (version_string.ToLower().Contains("mesa"))
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{
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int index = version_string.IndexOf('(');
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if (index != -1)
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version = version_string.Substring(index + 1, 3);
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else
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version = version_string.TrimStart(' ');
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}
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else
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version = version_string.TrimStart(' ');
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Debug.Print(version);
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if (version.StartsWith("1.2"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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}
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else if (version.StartsWith("1.3"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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}
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else if (version.StartsWith("1.4"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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}
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else if (version.StartsWith("1.5"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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}
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else if (version.StartsWith("2.0"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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AvailableExtensions.Add("gl_version_2_0", true);
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}
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else if (version.StartsWith("2.1"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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AvailableExtensions.Add("gl_version_2_0", true);
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AvailableExtensions.Add("gl_version_2_1", true);
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}
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string extension_string = GL.GetString(Enums.StringName.Extensions);
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if (String.IsNullOrEmpty(extension_string))
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return; // no extensions are available
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string[] extensions = extension_string.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
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foreach (string ext in extensions)
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AvailableExtensions.Add(ext.ToLower(), true);
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foreach (string s in AvailableExtensions.Keys)
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{
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Debug.Print(s);
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}
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rebuildExtensionList = false;
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}
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#endregion
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#region public static Delegate GetDelegate(string name, Type signature)
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/// <summary>
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@ -252,7 +150,7 @@ namespace OpenTK.OpenGL
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return
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GetExtensionDelegate(name, signature) ??
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/*((m = importsClass.GetMethod(name.Substring(2), BindingFlags.Static | BindingFlags.NonPublic)) != null ?*/
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(Imports.import.TryGetValue((name.Substring(2)), out m) ?
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(Imports.FunctionMap.TryGetValue((name.Substring(2)), out m) ?
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Delegate.CreateDelegate(signature, m) : null);
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}
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@ -455,6 +353,105 @@ namespace OpenTK.OpenGL
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#endregion
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#region private static void BuildExtensionList()
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/// <summary>
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/// Builds a cache of the supported extensions to speed up searches.
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/// </summary>
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private static void BuildExtensionList()
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{
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// Assumes there is an opengl context current.
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AvailableExtensions.Clear();
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string version_string = GL.GetString(StringName.Version);
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if (String.IsNullOrEmpty(version_string))
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{
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throw new ApplicationException("Failed to build extension list. Is there an opengl context current?");
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}
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string version;
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// Most drivers return the version in the 3 first characters of the version string,
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// (e.g. on Ati X1950 with Catalyst 7.10 -> "2.0.6956 Release"). However, Mesa seems
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// to do something strange: "1.4 (2.1 Mesa 7.0.1).".
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// We'll do some trickery to get the second number (2.1), but this may break on
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// some implementations...
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if (version_string.ToLower().Contains("mesa"))
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{
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int index = version_string.IndexOf('(');
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if (index != -1)
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version = version_string.Substring(index + 1, 3);
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else
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version = version_string.TrimStart(' ');
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}
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else
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version = version_string.TrimStart(' ');
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Debug.Print(version);
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if (version.StartsWith("1.2"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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}
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else if (version.StartsWith("1.3"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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}
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else if (version.StartsWith("1.4"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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}
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else if (version.StartsWith("1.5"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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}
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else if (version.StartsWith("2.0"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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AvailableExtensions.Add("gl_version_2_0", true);
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}
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else if (version.StartsWith("2.1"))
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{
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AvailableExtensions.Add("gl_version_1_1", true);
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AvailableExtensions.Add("gl_version_1_2", true);
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AvailableExtensions.Add("gl_version_1_3", true);
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AvailableExtensions.Add("gl_version_1_4", true);
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AvailableExtensions.Add("gl_version_1_5", true);
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AvailableExtensions.Add("gl_version_2_0", true);
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AvailableExtensions.Add("gl_version_2_1", true);
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}
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string extension_string = GL.GetString(Enums.StringName.Extensions);
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if (String.IsNullOrEmpty(extension_string))
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return; // no extensions are available
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string[] extensions = extension_string.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
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foreach (string ext in extensions)
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AvailableExtensions.Add(ext.ToLower(), true);
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foreach (string s in AvailableExtensions.Keys)
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Debug.Print(s);
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rebuildExtensionList = false;
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}
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#endregion
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#endregion
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#region --- GetProcAddress ---
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private static IGetProcAddress getProcAddress;
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