diff --git a/gb.opengl/src/GL.c b/gb.opengl/src/GL.c
index 5672206b4..251aa9c79 100644
--- a/gb.opengl/src/GL.c
+++ b/gb.opengl/src/GL.c
@@ -281,6 +281,8 @@ GB_DESC Cgl[] =
 	GB_STATIC_METHOD("TexEnviv", NULL, GLTEXENVIV, "(Target)i(Pname)i(Params)Integer[]"),
 	GB_STATIC_METHOD("TexImage1D", NULL, GLTEXIMAGE1D, "(Image)Image;[(Level)i(Border)i]"),
 	GB_STATIC_METHOD("TexImage2D", NULL, GLTEXIMAGE2D,"(Image)Image;[(Level)i(Border)i]"),
+	GB_STATIC_METHOD("TexSubImage1D", NULL, GLTEXSUBIMAGE2D,"(Image)Image;(XOffset)i(Width)i[(Level)i]"),
+	GB_STATIC_METHOD("TexSubImage2D", NULL, GLTEXSUBIMAGE2D,"(Image)Image;(XOffset)i(YOffset)i(Width)i(Height)i[(Level)i]"),
 	GB_STATIC_METHOD("TexParameterf", NULL, GLTEXPARAMETERF, "(Target)i(Pname)i(Param)f"),
 	GB_STATIC_METHOD("TexParameterfv", NULL, GLTEXPARAMETERFV, "(Target)i(Pname)i(Params)Float[]"),
 	GB_STATIC_METHOD("TexParameteri", NULL, GLTEXPARAMETERI, "(Target)i(Pname)i(Param)i"),
diff --git a/gb.opengl/src/GLtextureMapping.c b/gb.opengl/src/GLtextureMapping.c
index c76073c48..e548c77c1 100644
--- a/gb.opengl/src/GLtextureMapping.c
+++ b/gb.opengl/src/GLtextureMapping.c
@@ -242,7 +242,7 @@ BEGIN_METHOD(GLTEXIMAGE2D, GB_OBJECT Image; GB_INTEGER Level; GB_INTEGER Border)
 
 	GB_IMG *image;
 	int format;
-	
+
 	if (IMAGE_get(ARG(Image), &image, &format))
 		return;
 
@@ -251,6 +251,32 @@ BEGIN_METHOD(GLTEXIMAGE2D, GB_OBJECT Image; GB_INTEGER Level; GB_INTEGER Border)
 
 END_METHOD
 
+BEGIN_METHOD(GLTEXSUBIMAGE1D, GB_OBJECT Image; GB_INTEGER XOffset; GB_INTEGER Width; GB_INTEGER Level)
+
+	GB_IMG *image;
+	int format;
+
+	if (IMAGE_get(ARG(Image), &image, &format))
+		return;
+
+	glTexSubImage1D(GL_TEXTURE_1D, VARGOPT(Level, 0), VARG(XOffset), VARG(Width),
+		 format, GL_UNSIGNED_BYTE, image->data);
+
+END_METHOD
+
+BEGIN_METHOD(GLTEXSUBIMAGE2D, GB_OBJECT Image; GB_INTEGER XOffset; GB_INTEGER YOffset; GB_INTEGER Width; GB_INTEGER Height; GB_INTEGER Level)
+
+	GB_IMG *image;
+	int format;
+
+	if (IMAGE_get(ARG(Image), &image, &format))
+		return;
+
+	glTexSubImage2D(GL_TEXTURE_2D, VARGOPT(Level, 0), VARG(XOffset), VARG(YOffset), VARG(Width), VARG(Height),
+		 format, GL_UNSIGNED_BYTE, image->data);
+
+END_METHOD
+
 BEGIN_METHOD(GLTEXPARAMETERF, GB_INTEGER Target; GB_INTEGER Pname; GB_FLOAT Param)
 
 	glTexParameterf(VARG(Target), VARG(Pname), VARG(Param));
diff --git a/gb.opengl/src/GLtextureMapping.h b/gb.opengl/src/GLtextureMapping.h
index aa874f9cf..c31630077 100644
--- a/gb.opengl/src/GLtextureMapping.h
+++ b/gb.opengl/src/GLtextureMapping.h
@@ -47,6 +47,8 @@ DECLARE_METHOD(GLTEXENVI);
 DECLARE_METHOD(GLTEXENVIV);
 DECLARE_METHOD(GLTEXIMAGE1D);
 DECLARE_METHOD(GLTEXIMAGE2D);
+DECLARE_METHOD(GLTEXSUBIMAGE1D);
+DECLARE_METHOD(GLTEXSUBIMAGE2D);
 DECLARE_METHOD(GLTEXPARAMETERF);
 DECLARE_METHOD(GLTEXPARAMETERFV);
 DECLARE_METHOD(GLTEXPARAMETERI);