add matrix objects to the lua bindings, as well as a lua script to find the proportion of image draw commands with different kinds of matrices

git-svn-id: http://skia.googlecode.com/svn/trunk@9986 2bbb7eff-a529-9590-31e7-b0007b416f81

src/utils/SkLua.cpp

@@ -128,6 +128,11 @@ static void setfield_number(lua_State* L, const char key[], double value) {
     lua_setfield(L, -2, key);
 }
 
+static void setfield_boolean(lua_State* L, const char key[], bool value) {
+    lua_pushboolean(L, value);
+    lua_setfield(L, -2, key);
+}
+
 static void setfield_scalar(lua_State* L, const char key[], SkScalar value) {
     setfield_number(L, key, SkScalarToLua(value));
 }
@@ -648,6 +653,24 @@ static const struct luaL_Reg gSkPaint_Methods[] = {
 
 ///////////////////////////////////////////////////////////////////////////////
 
+static int lmatrix_getType(lua_State* L) {
+    SkMatrix::TypeMask mask = get_obj<SkMatrix>(L, 1)->getType();
+    
+    lua_newtable(L);
+    setfield_boolean(L, "translate",   SkToBool(mask & SkMatrix::kTranslate_Mask));
+    setfield_boolean(L, "scale",       SkToBool(mask & SkMatrix::kScale_Mask));
+    setfield_boolean(L, "affine",      SkToBool(mask & SkMatrix::kAffine_Mask));
+    setfield_boolean(L, "perspective", SkToBool(mask & SkMatrix::kPerspective_Mask));
+    return 1;
+}
+
+static const struct luaL_Reg gSkMatrix_Methods[] = {
+    { "getType", lmatrix_getType },
+    { NULL, NULL }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
 static int lpath_getBounds(lua_State* L) {
     SkLua(L).pushRect(get_obj<SkPath>(L, 1)->getBounds());
     return 1;
@@ -971,6 +994,7 @@ void SkLua::Load(lua_State* L) {
     REG_CLASS(L, SkPaint);
     REG_CLASS(L, SkRRect);
     REG_CLASS(L, SkTypeface);
+    REG_CLASS(L, SkMatrix);
 }
 
 extern "C" int luaopen_skia(lua_State* L);

tools/lua/find_rotated_bitmaps.lua

@@ -0,0 +1,71 @@
+function string.startsWith(String,Start)
+   return string.sub(String,1,string.len(Start))==Start
+end
+
+function string.endsWith(String,End)
+   return End=='' or string.sub(String,-string.len(End))==End
+end
+
+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
+
+local canvas = nil
+local num_perspective_bitmaps = 0
+local num_affine_bitmaps = 0
+local num_scaled_bitmaps = 0
+local num_translated_bitmaps = 0
+local num_identity_bitmaps = 0
+
+function sk_scrape_startcanvas(c, fileName) 
+  canvas = c
+end
+
+function sk_scrape_endcanvas(c, fileName)
+  canvas = nil
+end
+
+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()
+    if (string.startsWith(t.verb,"drawBitmap")) then
+      matrix = canvas:getTotalMatrix()
+      matrixType = matrix:getType()
+      if matrixType.perspective then
+        num_perspective_bitmaps = num_perspective_bitmaps + 1
+      elseif matrixType.affine then
+        num_affine_bitmaps = num_affine_bitmaps + 1
+      elseif matrixType.scale then 
+        num_scaled_bitmaps = num_scaled_bitmaps + 1
+      elseif matrixType.translate then
+        num_translated_bitmaps = num_translated_bitmaps + 1
+      else
+        num_identity_bitmaps = num_identity_bitmaps + 1
+      end
+    end
+end
+
+function sk_scrape_summarize()
+  io.write( "identity = ", num_identity_bitmaps,
+            ", translated = ", num_translated_bitmaps, 
+            ", scaled = ", num_scaled_bitmaps,
+            ", affine = ", num_affine_bitmaps,
+            ", perspective = ", num_perspective_bitmaps)
+end
+

tools/lua/skia.lua

@@ -1,5 +1,14 @@
 -- Experimental helpers for skia --
 
+function string.startsWith(String,Start)
+   return string.sub(String,1,string.len(Start))==Start
+end
+
+function string.endsWith(String,End)
+   return End=='' or string.sub(String,-string.len(End))==End
+end
+
+
 Sk = {}
 
 function Sk.isFinite(x)