--- a/pytouhou/lib/sdl.pxd
+++ b/pytouhou/lib/sdl.pxd
@@ -64,11 +64,11 @@
 
     # The following functions are there for the pure SDL backend.
     cdef bint create_renderer(self, Uint32 flags) except True
-    cdef bint render_clear(self) except True
-    cdef bint render_copy(self, Texture texture, Rect srcrect, Rect dstrect) except True
-    cdef bint render_copy_ex(self, Texture texture, Rect srcrect, Rect dstrect, double angle, bint flip) except True
-    cdef bint render_set_clip_rect(self, Rect rect) except True
-    cdef bint render_set_viewport(self, Rect rect) except True
+    cpdef bint render_clear(self) except True
+    cpdef bint render_copy(self, Texture texture, Rect srcrect, Rect dstrect) except True
+    cpdef bint render_copy_ex(self, Texture texture, Rect srcrect, Rect dstrect, double angle, bint flip) except True
+    cpdef bint render_set_clip_rect(self, Rect rect) except True
+    cpdef bint render_set_viewport(self, Rect rect) except True
     cdef Texture create_texture_from_surface(self, Surface surface)
 
 

--- a/pytouhou/lib/sdl.pyx
+++ b/pytouhou/lib/sdl.pyx
@@ -172,27 +172,27 @@
         if self.renderer == NULL:
             raise SDLError()
 
-    cdef bint render_clear(self) except True:
+    cpdef bint render_clear(self) except True:
         ret = SDL_RenderClear(self.renderer)
         if ret == -1:
             raise SDLError()
 
-    cdef bint render_copy(self, Texture texture, Rect srcrect, Rect dstrect) except True:
+    cpdef bint render_copy(self, Texture texture, Rect srcrect, Rect dstrect) except True:
         ret = SDL_RenderCopy(self.renderer, texture.texture, &srcrect.rect, &dstrect.rect)
         if ret == -1:
             raise SDLError()
 
-    cdef bint render_copy_ex(self, Texture texture, Rect srcrect, Rect dstrect, double angle, bint flip) except True:
+    cpdef bint render_copy_ex(self, Texture texture, Rect srcrect, Rect dstrect, double angle, bint flip) except True:
         ret = SDL_RenderCopyEx(self.renderer, texture.texture, &srcrect.rect, &dstrect.rect, angle, NULL, flip)
         if ret == -1:
             raise SDLError()
 
-    cdef bint render_set_clip_rect(self, Rect rect) except True:
+    cpdef bint render_set_clip_rect(self, Rect rect) except True:
         ret = SDL_RenderSetClipRect(self.renderer, &rect.rect)
         if ret == -1:
             raise SDLError()
 
-    cdef bint render_set_viewport(self, Rect rect) except True:
+    cpdef bint render_set_viewport(self, Rect rect) except True:
         ret = SDL_RenderSetViewport(self.renderer, &rect.rect)
         if ret == -1:
             raise SDLError()