-Fixed brush factory : it was unable to draw on the picture !

-Added a script that do a convolution of the image with a matrix. Not sure it works perfect yet.


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1252 416bcca6-2ee7-4201-b75f-2eb2f807beb1

factory.c

@@ -87,8 +87,10 @@ int L_GetPictureSize(lua_State* L)
 
 int L_PutPicturePixel(lua_State* L)
 {
-	Pixel_in_current_layer(lua_tonumber(L, 1), lua_tonumber(L, 2),
+  int x = lua_tonumber(L,1);
-		lua_tonumber(L, 3));
+  int y = lua_tonumber(L,2);
+  int c = lua_tonumber(L,3);
+	Pixel_figure_permanent(x, y, c);
 	return 0; // no values returned for lua
 }
 
@@ -232,7 +234,7 @@ void Button_Brush_Factory(void)
       if(message)
 			  Verbose_error_message(message);
       else
-        Warning_message("Unknown error loading script!");
+        Warning_message("Unknown error running script!");
     }
 
 		lua_close(L);

scripts/aafilter.lua

@@ -0,0 +1,25 @@
+-- Get the picture size
+w, h = getpicturesize();
+
+-- Here is the filtering matrix
+ matrix = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
+
+-- Loop trough all the pixels
+-- To make this script simpler we don't handle the picture borders
+-- (the matrix would get pixels outside the picture space)
+-- for var = start_value, end_value, step do ...
+for y = 1, h - 2, 1 do
+	for x = 1, w - 2, 1 do
+		filtered =
+			matrix[1][1] * getpicturepixel(x - 1, y - 1) +
+			matrix[1][2] * getpicturepixel(x    , y - 1) +
+			matrix[1][3] * getpicturepixel(x + 1, y - 1) +
+			matrix[2][1] * getpicturepixel(x - 1, y    ) +
+			matrix[2][2] * getpicturepixel(x    , y    ) +
+			matrix[2][3] * getpicturepixel(x + 1, y    ) +
+			matrix[3][1] * getpicturepixel(x - 1, y + 1) +
+			matrix[3][2] * getpicturepixel(x    , y + 1) +
+			matrix[3][3] * getpicturepixel(x + 1, y + 1);
+		putpicturepixel(x,y,filtered);
+	end
+end