diff --git a/SMILEBASIC/builtinfunctions.d b/SMILEBASIC/builtinfunctions.d
index 43a6af6..fbb9ca7 100644
--- a/SMILEBASIC/builtinfunctions.d
+++ b/SMILEBASIC/builtinfunctions.d
@@ -591,6 +591,79 @@ class BuiltinFunction
             throw new TypeMismatch("GSAVE", 1);
         GSAVE(p, p.graphic.useGRP, ary, flag);
     }
+    static void GLOAD(PetitComputer p, int x, int y, int w, int h, Value ary, Value flagOrPalette, int copymode)
+    {
+        if (!ary.isNumberArray)
+        {
+            throw new TypeMismatch("GLOAD", 5);
+        }
+        if (w < 0)
+            throw new OutOfRange("GLOAD", 3);
+        if (h < 0)
+            throw new OutOfRange("GLOAD", 4);
+        if (w * h > ary.length)
+        {
+            throw new SubscriptOutOfRange("GLOAD", 5);
+        }
+        if (flagOrPalette.isNumber)
+        {
+            int colorflag = flagOrPalette.castInteger;
+            if (ary.type == ValueType.IntegerArray)
+            {
+                p.graphic.gload(x, y, w, h, ary.integerArray.array, colorflag, copymode);
+            }
+            if (ary.type == ValueType.DoubleArray)
+            {
+                p.graphic.gload(x, y, w, h, ary.doubleArray.array, colorflag, copymode);
+            }
+        }
+        else if (flagOrPalette.isNumberArray)
+        {
+            if (ary.type == ValueType.IntegerArray)
+            {
+                if (flagOrPalette.type == ValueType.IntegerArray)
+                {
+                    p.graphic.gloadPalette(x, y, w, h, ary.integerArray.array, flagOrPalette.integerArray.array, copymode);
+                }
+                if (flagOrPalette.type == ValueType.DoubleArray)
+                {
+                    p.graphic.gloadPalette(x, y, w, h, ary.integerArray.array, flagOrPalette.doubleArray.array, copymode);
+                }
+            }
+            if (ary.type == ValueType.DoubleArray)
+            {
+                if (flagOrPalette.type == ValueType.IntegerArray)
+                {
+                    p.graphic.gloadPalette(x, y, w, h, ary.doubleArray.array, flagOrPalette.integerArray.array, copymode);
+                }
+                if (flagOrPalette.type == ValueType.DoubleArray)
+                {
+                    p.graphic.gloadPalette(x, y, w, h, ary.doubleArray.array, flagOrPalette.doubleArray.array, copymode);
+                }
+            }
+        }
+        else
+        {
+            throw new TypeMismatch("GLOAD", 6);
+        }
+    }
+    static void GLOAD(PetitComputer p, Value ary, Value flagOrPalette, int copymode)
+    {
+        if (!ary.isNumberArray)
+        {
+            throw new TypeMismatch("GLOAD", 1);
+        }
+        auto writeArea = p.graphic.writeArea[p.displaynum];
+        if (writeArea.w * writeArea.h > ary.length)
+        {
+            throw new SubscriptOutOfRange("GLOAD", 1);
+        }
+        if (!flagOrPalette.isNumber && !flagOrPalette.isNumberArray)
+        {
+            throw new TypeMismatch("GLOAD", 2);
+        }
+        GLOAD(p, writeArea.x, writeArea.y, writeArea.w, writeArea.h, ary, flagOrPalette, copymode);
+    }
     static void BGMPLAY(PetitComputer p, int music)
     {
     }
diff --git a/SMILEBASIC/error.d b/SMILEBASIC/error.d
index cb9fad5..e93587c 100644
--- a/SMILEBASIC/error.d
+++ b/SMILEBASIC/error.d
@@ -164,6 +164,16 @@ class SubscriptOutOfRange : SmileBasicError
         this.errnum = 31;
         super("Subscript out of range");
     }
+    this(string func)
+    {
+        this.errnum = 31;
+        super("Subscript out of range(" ~ func ~ ")");
+    }
+    this(string func, int arg)
+    {
+        this.errnum = 31;
+        super("Subscript out of range(" ~ func ~ ":" ~ arg.to!string ~ ")");
+    }
 }
 class StringTooLong : SmileBasicError
 {
diff --git a/SMILEBASIC/graphic.d b/SMILEBASIC/graphic.d
index f7a067a..3691ecb 100644
--- a/SMILEBASIC/graphic.d
+++ b/SMILEBASIC/graphic.d
@@ -590,14 +590,63 @@ class Graphic
             //ARRRRRGGGGGBBBBB
             for (int i = 0; i < array.length; i++)
             {
-                auto a = (array[i] & 0xFF000000) >> 24;
-                auto r = (array[i] & 0x00FF0000) >> 16;
-                auto g = (array[i] & 0x0000FF00) >> 8;
-                auto b = (array[i] & 0x000000FF);
-                array[i] = (a == 255) | r >> 3 << 11 | g >> 3 << 6 | b >> 3 << 1;
+                array[i] = ARGB32ToRGBA16Color(array[i]);
             }
         }
     }
+    int ARGB32ToRGBA16Color(int argb32)
+    {
+        auto a = (argb32 & 0xFF000000) >> 24;
+        auto r = (argb32 & 0x00FF0000) >> 16;
+        auto g = (argb32 & 0x0000FF00) >> 8;
+        auto b = (argb32 & 0x000000FF);
+        return (a == 255) | r >> 3 << 11 | g >> 3 << 6 | b >> 3 << 1;
+    }
+    void gload(int x, int y, int w, int h, int[] array, int flag, int copymode)
+    {
+        if (w * h > array.length)
+            return;
+        if (!copymode)
+        {
+            glEnable(GL_ALPHA_TEST);
+        }
+        glRasterPos2i(x, y);
+        //convertColor
+        if (flag)
+        {
+            //ARRRRRGGGGGBBBBB
+            for (int i = 0; i < array.length; i++)
+            {
+                paint.buffer[i] = ARGB32ToRGBA16Color(array[i]);
+            }
+            glDrawPixels(w , h , GL_BGRA , GL_UNSIGNED_BYTE , paint.buffer.ptr);
+        }
+        else
+        {
+            glDrawPixels(w , h , GL_BGRA , GL_UNSIGNED_BYTE , array.ptr);
+        }
+        if (!copymode)
+        {
+            glDisable(GL_ALPHA_TEST);
+        }
+    }
+    void gload(int x, int y, int w, int h, double[] array, int flag, int copymode)
+    {
+        for (int i = 0; i < array.length; i++)
+        {
+            paint.buffer[i] = cast(int)array[i];
+        }
+        gload(x, y, w, h, cast(int[])paint.buffer, flag, copymode);
+    }
+    void gloadPalette(T, T2)(int x, int y, int w, int h, T[] array, T2[] palette, int copymode)
+        if ((is(T == int) || is(T == double)) && (is(T2 == int) || is(T2 == double)))
+    {
+        for (int i = 0; i < array.length; i++)
+        {
+            paint.buffer[i] = cast(int)palette[cast(int)array[i]];
+        }
+        gload(x, y, w, h, cast(int[])paint.buffer, 0, copymode);
+    }
     int gprio;
     void render()
     {