daily uodate on 20231208 by nitload youmu, preparation for multi thread rendering

源代码/StgSharp/Graphics/GL/glApiManager.cs

@@ -22,9 +22,17 @@ namespace StgSharp.Graphics
 
         private static string glExtensionList;
 
-
-        public static unsafe void LoadGLapi(Form form, GLfuncLoader loader)
+        /// <summary>
+        /// Load all aupportable OpenGL APIs and bind them to given <see cref="Form"/> context.
+        /// </summary>
+        /// <param name="form">The <see cref="Form"/> used as current OpenGL context</param>
+        /// <param name="loader">A delegate that can get o</param>
+        public static unsafe void LoadGLapi(this Form form, GLfuncLoader loader)
         {
+            if (loader == null)
+            {
+                loader = LoadGLfunc;
+            }
             if (form.contextID->GetString != IntPtr.Zero)
             {
                 return;
@@ -775,14 +783,14 @@ namespace StgSharp.Graphics
 
         }
 
-        internal unsafe static string GetExtensions()
+        internal unsafe static string GetExtensions(this Form form)
         {
-            if (GL.gl == null)
+            if (form.glContext == null)
             {
                 return "";
             }
             return Marshal.PtrToStringAnsi(
-                GL.gl.GetString(glExtension));
+                form.glContext.GetString(glExtension));
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]