探索順序の変更(キャッシュメモリを考慮)

Author: Mr-Ojii

AutoClipping_M.anm

@@ -42,86 +42,86 @@ if jit ~= nil then
     } Pixel;
   ]])
 
-  local function get_left(cdata, w, h)
-    for x = 0, w - 1 do for y = 0, h - 1 do
+  local function get_left(cdata, w, h, top, bottom)
+    for x = 0, w - 1 do for y = top, bottom do
       if (cdata + x + y * w).a ~= 0 then return x end
     end end
     return -1
   end
 
-  local function get_right(cdata, w, h)
-    for x = w - 1, 0, -1 do for y = 0, h - 1 do
+  local function get_right(cdata, w, h, top, bottom)
+    for x = w - 1, 0, -1 do for y = top, bottom do
       if (cdata + x + y * w).a ~= 0 then return x end
     end end
     return -1
   end
 
-  local function get_top(cdata, w, h, left, right)
-    for y = 0, h - 1 do for x = left, right do
+  local function get_top(cdata, w, h)
+    for y = 0, h - 1 do for x = 0, w - 1 do
       if (cdata + x + y * w).a ~= 0 then return y end
     end end
     return -1
   end
 
-  local function get_bottom(cdata, w, h, left, right)
-    for y = h - 1, 0, -1 do for x = left, right do
+  local function get_bottom(cdata, w, h)
+    for y = h - 1, 0, -1 do for x = 0, w - 1 do
       if (cdata + x + y * w).a ~= 0 then return y end
     end end
     return -1
   end
 
   local data, _, _ = obj.getpixeldata()
   local cdata = ffi.cast("Pixel*", data)
-  left = get_left(cdata, w, h)
-  if left == -1 then
+  top = get_top(cdata, w, h)
+  if top == -1 then
     return
   end
-  right = get_right(cdata, w, h)
-  top = get_top(cdata, w, h, left, right)
-  bottom = get_bottom(cdata, w, h, left, right)
+  bottom = get_bottom(cdata, w, h)
+  left = get_left(cdata, w, h, top, bottom)
+  right = get_right(cdata, w, h, top, bottom)
 
 else
 
   -- Lua
-  local function get_left(w, h)
-    for x = 0, w - 1 do for y = 0, h - 1 do
+  local function get_left(w, h, top, bottom)
+    for x = 0, w - 1 do for y = top, bottom do
       local col, a = obj.getpixel(x, y, "col")
       if a ~= 0 then return x end
     end end
     return -1
   end
 
-  local function get_right(w, h)
-    for x = w - 1, 0, -1 do for y = 0, h - 1 do
+  local function get_right(w, h, top, bottom)
+    for x = w - 1, 0, -1 do for y = top, bottom do
       local col, a = obj.getpixel(x, y, "col")
       if a ~= 0 then return x end
     end end
     return -1
   end
 
-  local function get_top(w, h, left, right)
-    for y = 0, h - 1 do for x = left, right do
+  local function get_top(w, h)
+    for y = 0, h - 1 do for x = 0, w - 1 do
       local col, a = obj.getpixel(x, y, "col")
       if a ~= 0 then return y end
     end end
     return -1
   end
 
-  local function get_bottom(w, h, left, right)
-    for y = h - 1, 0, -1 do for x = left, right do
+  local function get_bottom(w, h)
+    for y = h - 1, 0, -1 do for x = 0, w - 1 do
       local col, a = obj.getpixel(x, y, "col")
       if a ~= 0 then return y end
     end end
     return -1
   end
 
-  left = get_left(w, h)
-  if left == -1 then
+  top = get_top(w, h)
+  if top == -1 then
     return
   end
-  right = get_right(w, h)
-  top = get_top(w, h, left, right)
-  bottom = get_bottom(w, h, left, right)
+  bottom = get_bottom(w, h)
+  left = get_left(w, h, top, bottom)
+  right = get_right(w, h, top, bottom)
 end
 
 obj.effect("クリッピング", "上", top + crop[1], "下", h - bottom - 1 + crop[2], "左", left + crop[3], "右", w - right - 1 + crop[4], "中心の位置を変更", chk)