add paint:getEffects to return table of bools of a given effect is present on the paint

git-svn-id: http://skia.googlecode.com/svn/trunk@9978 2bbb7eff-a529-9590-31e7-b0007b416f81

src/utils/SkLua.cpp

@@ -111,6 +111,13 @@ bool SkLua::runCode(const void* code, size_t size) {
 
 #define CHECK_SETFIELD(key) do if (key) lua_setfield(fL, -2, key); while (0)
 
+static void setfield_bool_if(lua_State* L, const char key[], bool pred) {
+    if (pred) {
+        lua_pushboolean(L, true);
+        lua_setfield(L, -2, key);
+    }
+}
+
 static void setfield_string(lua_State* L, const char key[], const char value[]) {
     lua_pushstring(L, value);
     lua_setfield(L, -2, key);
@@ -596,6 +603,21 @@ static int lpaint_getFontMetrics(lua_State* L) {
     return 2;
 }
 
+static int lpaint_getEffects(lua_State* L) {
+    const SkPaint* paint = get_obj<SkPaint>(L, 1);
+    
+    lua_newtable(L);
+    setfield_bool_if(L, "looper", !!paint->getLooper());
+    setfield_bool_if(L, "pathEffect", !!paint->getPathEffect());
+    setfield_bool_if(L, "rasterizer", !!paint->getRasterizer());
+    setfield_bool_if(L, "maskFilter", !!paint->getMaskFilter());
+    setfield_bool_if(L, "shader", !!paint->getShader());
+    setfield_bool_if(L, "colorFilter", !!paint->getColorFilter());
+    setfield_bool_if(L, "imageFilter", !!paint->getImageFilter());
+    setfield_bool_if(L, "xfermode", !!paint->getXfermode());
+    return 1;
+}
+
 static int lpaint_gc(lua_State* L) {
     get_obj<SkPaint>(L, 1)->~SkPaint();
     return 0;
@@ -619,6 +641,7 @@ static const struct luaL_Reg gSkPaint_Methods[] = {
     { "setStrokeWidth", lpaint_setStrokeWidth },
     { "measureText", lpaint_measureText },
     { "getFontMetrics", lpaint_getFontMetrics },
+    { "getEffects", lpaint_getEffects },
     { "__gc", lpaint_gc },
     { NULL, NULL }
 };

tools/lua/count_effects.lua

@@ -0,0 +1,50 @@
+function tostr(t)
+    local str = ""
+    for k, v in next, t do
+        if #str > 0 then
+            str = str .. ", "
+        end
+        if type(k) == "number" then
+            str = str .. "[" .. k .. "] = "
+        else
+            str = str .. tostring(k) .. " = "
+        end
+        if type(v) == "table" then
+            str = str .. "{ " .. tostr(v) .. " }"
+        else
+            str = str .. tostring(v)
+        end
+    end
+    return str
+end
+
+function sk_scrape_startcanvas(c, fileName) end
+
+function sk_scrape_endcanvas(c, fileName) end
+
+local effects = {}
+
+function count_fields(t)
+    for k, v in next, t do
+        effects[k] = (effects[k] or 0) + 1
+    end
+end
+
+local total_paints = 0;
+
+function sk_scrape_accumulate(t)
+    -- dump the params in t, specifically showing the verb first, which we
+    -- then nil out so it doesn't appear in tostr()
+    io.write(t.verb, " ")
+    t.verb = nil
+    if (t.paint) then
+        total_paints = total_paints + 1
+        count_fields(t.paint:getEffects())
+    end
+    io.write(tostr(t), "\n")
+end
+
+function sk_scrape_summarize()
+    io.write("total paints ", total_paints, " ", tostr(effects), "\n");
+end
+