bug of overflow due to IntPtr solved

源代码/StgSharp/Graphics/Graphic.cs

@@ -8,16 +8,8 @@ namespace StgSharp
     {
         internal static GraphicIOPack glIO;
         private static bool isGLSet = false;
-
-        /// <summary>
-        /// Init an instance of OpenGL program,
-        /// This method should be called before other 
-        /// graphic methods, after LoadGL method.
-        /// </summary>
-        public static void InitGL()
-        {
-            internalIO.InternalInitGL();
-        }
+        private static bool isGLADset = false;
+        private static bool isGLready = false;
 
         /// <summary>
         /// Load OpenGL API to StgSharp core programm,
@@ -27,7 +19,7 @@ namespace StgSharp
         /// <exception cref="Exception">If run this method twice, will throw exception</exception>
         public static unsafe void LoadGL()
         {
-            if (!isGLSet)
+            if (!isGLADset)
             {
                 glIO = internalIO.InternalInitGraphicApi();
             }
@@ -37,6 +29,27 @@ namespace StgSharp
             }
         }
 
+
+        /// <summary>
+        /// Init an instance of OpenGL program,
+        /// This method should be called before other 
+        /// graphic methods, after LoadGL method.
+        /// </summary>
+        public static void InitGL()
+        {
+            if (!isGLSet)
+            {
+                internalIO.InternalInitGL();
+                isGLready = isGLSet && isGLADset;
+            }
+            else
+            {
+                throw new Exception("Do not init GL twice");
+            }
+        }
+
+        
+
         /// <summary>
         /// Attach GLFW API to GLAD, 
         /// this method should be called after LoadGL 
@@ -45,32 +58,27 @@ namespace StgSharp
         /// <exception cref="Exception">The accident that program cannot attach GLFW to GLAD</exception>
         public static unsafe void InitGLAD()
         {
-            int a = internalIO.InternalInitGLAD();
-            if (a!=0)
+            
+            if (!isGLADset)
             {
-                throw new Exception("Cannot attach GLFW to GLAD!");
+                int a = internalIO.InternalInitGLAD();
+                if (a != 0)
+                {
+                    throw new Exception("Cannot attach GLFW to GLAD!");
+                }
+                else
+                {
+                    isGLready = isGLSet && isGLADset;
+                    return;
+                }
             }
             else
             {
-                return;
+                throw new Exception("Do not init GLAD twice.");
             }
         }
 
 
-        internal static byte[] loadShaderCodeStr(string str)
-        {
-            byte[] cahrStr; 
-            try
-            {
-                cahrStr = System.Text.Encoding.ASCII.GetBytes(str);
-                return cahrStr;
-            }
-            catch (Exception)
-            {
-                throw;
-            }
-        }
-