mirror of https://github.com/odrling/Aegisub
Fix really stupid parameter-related bug in box blur, and update documentation.
Originally committed to SVN as r1480.
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@ -143,11 +143,9 @@ raster.gaussian_blur(surface, sigma)
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Applies a strength sigma gaussian blur on the surface.
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raster.box3(surface, repetitions)
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raster.box5(sutface, repetitions)
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raster.box15(surface, repetitions)
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raster.box(surface, size, repetitions)
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Applies a box filter (blur) of various sizes to the surface as many times as
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Applies a box filter (blur) of variable size to the surface as many times as
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specified. Please note that no specific optimisation is done for applying
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box filters over more general filters and using box blur over gaussian blur
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is probably no faster and might even be slower.
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@ -329,9 +329,9 @@ static int gaussian_blur(lua_State *L)
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static int box_blur(lua_State *L)
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{
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LuaCairoSurface *surfobj = LuaCairoSurface::GetObjPointer(L, 1);
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int width = luaL_checkint(L, 1);
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int width = luaL_checkint(L, 2);
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if (width <= 0) { luaL_error(L, "Width of box kernel for raster.box must be larger than zero, specified to %d.", width); return 0; }
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int applications = luaL_optint(L, 1, 1);
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int applications = luaL_optint(L, 3, 1);
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int *kernel = new int[width];
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for (int i = 0; i < width; i++)
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kernel[i] = 1;
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