diff --git a/glwidget.cpp b/glwidget.cpp
index 422ebc1..ee419eb 100644
--- a/glwidget.cpp
+++ b/glwidget.cpp
@@ -126,3 +126,18 @@ bool CheckProgramLink(GLuint program)
     return false;
 }
 
+opengl_texture initialize_texture(int w, int h, unsigned char *pixels)
+{
+    GLuint tex;
+
+    glGenTextures(1, &tex);
+    glBindTexture(GL_TEXTURE_2D, tex);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    CheckOpenGL(__FILE__, __LINE__);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, pixels);
+    CheckOpenGL(__FILE__, __LINE__);
+    return {w, h, tex};
+}
+
diff --git a/glwidget.h b/glwidget.h
index d36611d..87d58a8 100644
--- a/glwidget.h
+++ b/glwidget.h
@@ -90,4 +90,14 @@ struct render_target
     }
 };
 
+struct opengl_texture
+{
+    int w;
+    int h;
+    GLuint t;
+    operator GLuint() const { return t; }
+};
+
+opengl_texture initialize_texture(int w, int h, unsigned char *pixels = NULL);
+
 #endif /* __GLWIDGET_H__ */
diff --git a/interface.cpp b/interface.cpp
index b95e64c..c83bd8b 100644
--- a/interface.cpp
+++ b/interface.cpp
@@ -90,29 +90,6 @@ event dequeue_event()
         return {NONE, 0};
 }
 
-struct opengl_texture
-{
-    int w;
-    int h;
-    GLuint t;
-    operator GLuint() const { return t; }
-};
-
-opengl_texture initialize_texture(int w, int h, unsigned char *pixels = NULL)
-{
-    GLuint tex;
-
-    glGenTextures(1, &tex);
-    glBindTexture(GL_TEXTURE_2D, tex);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-    CheckOpenGL(__FILE__, __LINE__);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, pixels);
-    CheckOpenGL(__FILE__, __LINE__);
-    return {w, h, tex};
-}
-
 opengl_texture font_texture;
 const int fonttexture_w = 7;
 const int fonttexture_h = 8 * 96;