diff --git a/sc2/ChangeLog b/sc2/ChangeLog
index db7711c6f..0562811f8 100644
--- a/sc2/ChangeLog
+++ b/sc2/ChangeLog
@@ -1,4 +1,6 @@
 Changes towards version 0.7:
+- Added TFB_Canvas_Lock(), TFB_Canvas_Unlock() and TFB_Canvas_GetStride()
+  - SvdB
 - Scaling images with respect to their hotspots: stabilizes compound
   Melee objects; re-added bilinear Melee scaler; zooming planet uses
   bilinear; fixes bug #685 - Alex
diff --git a/sc2/src/sc2code/libs/graphics/sdl/canvas.c b/sc2/src/sc2code/libs/graphics/sdl/canvas.c
index cc77b7844..6059b2265 100644
--- a/sc2/src/sc2code/libs/graphics/sdl/canvas.c
+++ b/sc2/src/sc2code/libs/graphics/sdl/canvas.c
@@ -1527,6 +1527,20 @@ TFB_DrawCanvas_Rescale_Bilinear (TFB_Canvas src_canvas, TFB_Canvas dst_canvas,
 	SDL_UnlockSurface(src);
 }
 
+void
+TFB_DrawCanvas_Lock (TFB_Canvas canvas)
+{
+	SDL_Surface *surf = (SDL_Surface *)canvas;
+	SDL_LockSurface (surf);
+}
+
+void
+TFB_DrawCanvas_Unlock (TFB_Canvas canvas)
+{
+	SDL_Surface *surf = (SDL_Surface *)canvas;
+	SDL_UnlockSurface (surf);
+}
+
 void
 TFB_DrawCanvas_GetScreenFormat (TFB_PixelFormat *fmt)
 {
@@ -1553,11 +1567,18 @@ TFB_DrawCanvas_GetScreenFormat (TFB_PixelFormat *fmt)
 	}
 }
 
+int
+TFB_DrawCanvas_GetStride (TFB_Canvas canvas)
+{
+	SDL_Surface *surf = (SDL_Surface *)canvas;
+	return surf->pitch;
+}
+
 void*
 TFB_DrawCanvas_GetLine (TFB_Canvas canvas, int line)
 {
-	SDL_Surface* surf = (SDL_Surface *)canvas;
-	return (uint8*)surf->pixels + surf->pitch * line;
+	SDL_Surface *surf = (SDL_Surface *)canvas;
+	return (uint8 *)surf->pixels + surf->pitch * line;
 }
 
 void
@@ -1618,3 +1639,4 @@ TFB_DrawCanvas_GetRotatedExtent (TFB_Canvas src_canvas, int angle, EXTENT *size)
 	size->height = dsth;
 	size->width = dstw;
 }
+
diff --git a/sc2/src/sc2code/libs/graphics/tfb_draw.h b/sc2/src/sc2code/libs/graphics/tfb_draw.h
index 55ccd65e6..d3b113c55 100644
--- a/sc2/src/sc2code/libs/graphics/tfb_draw.h
+++ b/sc2/src/sc2code/libs/graphics/tfb_draw.h
@@ -150,7 +150,10 @@ BOOLEAN TFB_DrawCanvas_GetTransparentColor (TFB_Canvas canvas, int *r, int *g, i
 void TFB_DrawCanvas_SetTransparentColor (TFB_Canvas canvas, int r, int g, int b, BOOLEAN rleaccel);
 void TFB_DrawCanvas_CopyTransparencyInfo (TFB_Canvas src, TFB_Canvas dst);
 void TFB_DrawCanvas_Initialize (void);
+void TFB_DrawCanvas_Lock (TFB_Canvas canvas);
+void TFB_DrawCanvas_Unlock (TFB_Canvas canvas);
 void TFB_DrawCanvas_GetScreenFormat (TFB_PixelFormat *fmt);
+int TFB_DrawCanvas_GetStride (TFB_Canvas canvas);
 void* TFB_DrawCanvas_GetLine (TFB_Canvas canvas, int line);
 void TFB_DrawCanvas_GetPixel (TFB_Canvas canvas, int x, int y, int *r, int *g, int *b);