The Tor Browser: gfx/skia/trunk/src/utils/SkLua.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkLua.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkLua.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkLua.h"
 #if SK_SUPPORT_GPU
 #include "GrReducedClip.h"
 #endif
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDocument.h"
 #include "SkImage.h"
 #include "SkMatrix.h"
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkPixelRef.h"
 #include "SkRRect.h"
 #include "SkString.h"
 #include "SkTypeface.h"
 extern "C" {
     #include "lua.h"
     #include "lualib.h"
     #include "lauxlib.h"
 }
 // return the metatable name for a given class
 template <typename T> const char* get_mtname();
 #define DEF_MTNAME(T)                           \
     template <> const char* get_mtname<T>() {   \
         return #T "_LuaMetaTableName";          \
     }
 DEF_MTNAME(SkCanvas)
 DEF_MTNAME(SkDocument)
 DEF_MTNAME(SkImage)
 DEF_MTNAME(SkMatrix)
 DEF_MTNAME(SkRRect)
 DEF_MTNAME(SkPath)
 DEF_MTNAME(SkPaint)
 DEF_MTNAME(SkShader)
 DEF_MTNAME(SkTypeface)
 template <typename T> T* push_new(lua_State* L) {
     T* addr = (T*)lua_newuserdata(L, sizeof(T));
     new (addr) T;
     luaL_getmetatable(L, get_mtname<T>());
     lua_setmetatable(L, -2);
     return addr;
 }
 template <typename T> void push_obj(lua_State* L, const T& obj) {
     new (lua_newuserdata(L, sizeof(T))) T(obj);
     luaL_getmetatable(L, get_mtname<T>());
     lua_setmetatable(L, -2);
 }
 template <typename T> void push_ref(lua_State* L, T* ref) {
     *(T**)lua_newuserdata(L, sizeof(T*)) = SkSafeRef(ref);
     luaL_getmetatable(L, get_mtname<T>());
     lua_setmetatable(L, -2);
 }
 template <typename T> T* get_ref(lua_State* L, int index) {
     return *(T**)luaL_checkudata(L, index, get_mtname<T>());
 }
 template <typename T> T* get_obj(lua_State* L, int index) {
     return (T*)luaL_checkudata(L, index, get_mtname<T>());
 }
 static bool lua2bool(lua_State* L, int index) {
     return !!lua_toboolean(L, index);
 }
 ///////////////////////////////////////////////////////////////////////////////
 SkLua::SkLua(const char termCode[]) : fTermCode(termCode), fWeOwnL(true) {
     fL = luaL_newstate();
     luaL_openlibs(fL);
     SkLua::Load(fL);
 }
 SkLua::SkLua(lua_State* L) : fL(L), fWeOwnL(false) {}
 SkLua::~SkLua() {
     if (fWeOwnL) {
         if (fTermCode.size() > 0) {
             lua_getglobal(fL, fTermCode.c_str());
             if (lua_pcall(fL, 0, 0, 0) != LUA_OK) {
                 SkDebugf("lua err: %s\n", lua_tostring(fL, -1));
             }
         }
         lua_close(fL);
     }
 }
 bool SkLua::runCode(const char code[]) {
     int err = luaL_loadstring(fL, code) || lua_pcall(fL, 0, 0, 0);
     if (err) {
         SkDebugf("--- lua failed: %s\n", lua_tostring(fL, -1));
         return false;
     }
     return true;
 }
 bool SkLua::runCode(const void* code, size_t size) {
     SkString str((const char*)code, size);
     return this->runCode(str.c_str());
 }
 ///////////////////////////////////////////////////////////////////////////////
 #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);
 }
 static void setfield_number(lua_State* L, const char key[], double value) {
     lua_pushnumber(L, 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));
 }
 static void setfield_function(lua_State* L,
                               const char key[], lua_CFunction value) {
     lua_pushcfunction(L, value);
     lua_setfield(L, -2, key);
 }
 static void setarray_number(lua_State* L, int index, double value) {
     lua_pushnumber(L, value);
     lua_rawseti(L, -2, index);
 }
 void SkLua::pushBool(bool value, const char key[]) {
     lua_pushboolean(fL, value);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushString(const char str[], const char key[]) {
     lua_pushstring(fL, str);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushString(const char str[], size_t length, const char key[]) {
     // TODO: how to do this w/o making a copy?
     SkString s(str, length);
     lua_pushstring(fL, s.c_str());
     CHECK_SETFIELD(key);
 }
 void SkLua::pushString(const SkString& str, const char key[]) {
     lua_pushstring(fL, str.c_str());
     CHECK_SETFIELD(key);
 }
 void SkLua::pushColor(SkColor color, const char key[]) {
     lua_newtable(fL);
     setfield_number(fL, "a", SkColorGetA(color) / 255.0);
     setfield_number(fL, "r", SkColorGetR(color) / 255.0);
     setfield_number(fL, "g", SkColorGetG(color) / 255.0);
     setfield_number(fL, "b", SkColorGetB(color) / 255.0);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushU32(uint32_t value, const char key[]) {
     lua_pushnumber(fL, (double)value);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushScalar(SkScalar value, const char key[]) {
     lua_pushnumber(fL, SkScalarToLua(value));
     CHECK_SETFIELD(key);
 }
 void SkLua::pushArrayU16(const uint16_t array[], int count, const char key[]) {
     lua_newtable(fL);
     for (int i = 0; i < count; ++i) {
         // make it base-1 to match lua convention
         setarray_number(fL, i + 1, (double)array[i]);
     }
     CHECK_SETFIELD(key);
 }
 void SkLua::pushRect(const SkRect& r, const char key[]) {
     lua_newtable(fL);
     setfield_scalar(fL, "left", r.fLeft);
     setfield_scalar(fL, "top", r.fTop);
     setfield_scalar(fL, "right", r.fRight);
     setfield_scalar(fL, "bottom", r.fBottom);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushRRect(const SkRRect& rr, const char key[]) {
     push_obj(fL, rr);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushMatrix(const SkMatrix& matrix, const char key[]) {
     push_obj(fL, matrix);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushPaint(const SkPaint& paint, const char key[]) {
     push_obj(fL, paint);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushPath(const SkPath& path, const char key[]) {
     push_obj(fL, path);
     CHECK_SETFIELD(key);
 }
 void SkLua::pushCanvas(SkCanvas* canvas, const char key[]) {
     push_ref(fL, canvas);
     CHECK_SETFIELD(key);
 }
 static const char* element_type(SkClipStack::Element::Type type) {
     switch (type) {
         case SkClipStack::Element::kEmpty_Type:
             return "empty";
         case SkClipStack::Element::kRect_Type:
             return "rect";
         case SkClipStack::Element::kRRect_Type:
             return "rrect";
         case SkClipStack::Element::kPath_Type:
             return "path";
     }
     return "unknown";
 }
 static const char* region_op(SkRegion::Op op) {
     switch (op) {
         case SkRegion::kDifference_Op:
             return "difference";
         case SkRegion::kIntersect_Op:
             return "intersect";
         case SkRegion::kUnion_Op:
             return "union";
         case SkRegion::kXOR_Op:
             return "xor";
         case SkRegion::kReverseDifference_Op:
             return "reverse-difference";
         case SkRegion::kReplace_Op:
             return "replace";
     }
     return "unknown";
 }
 void SkLua::pushClipStack(const SkClipStack& stack, const char* key) {
     lua_newtable(fL);
     SkClipStack::B2TIter iter(stack);
     const SkClipStack::Element* element;
     int i = 0;
     while (NULL != (element = iter.next())) {
         this->pushClipStackElement(*element);
         lua_rawseti(fL, -2, ++i);
     }
     CHECK_SETFIELD(key);
 }
 void SkLua::pushClipStackElement(const SkClipStack::Element& element, const char* key) {
     lua_newtable(fL);
     SkClipStack::Element::Type type = element.getType();
     this->pushString(element_type(type), "type");
     switch (type) {
         case SkClipStack::Element::kEmpty_Type:
             break;
         case SkClipStack::Element::kRect_Type:
             this->pushRect(element.getRect(), "rect");
             break;
         case SkClipStack::Element::kRRect_Type:
             this->pushRRect(element.getRRect(), "rrect");
             break;
         case SkClipStack::Element::kPath_Type:
             this->pushPath(element.getPath(), "path");
             break;
     }
     this->pushString(region_op(element.getOp()), "op");
     this->pushBool(element.isAA(), "aa");
     CHECK_SETFIELD(key);
 }
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 static SkScalar lua2scalar(lua_State* L, int index) {
     SkASSERT(lua_isnumber(L, index));
     return SkLuaToScalar(lua_tonumber(L, index));
 }
 static SkScalar lua2scalar_def(lua_State* L, int index, SkScalar defaultValue) {
     if (lua_isnumber(L, index)) {
         return SkLuaToScalar(lua_tonumber(L, index));
     } else {
         return defaultValue;
     }
 }
 static SkScalar getfield_scalar(lua_State* L, int index, const char key[]) {
     SkASSERT(lua_istable(L, index));
     lua_pushstring(L, key);
     lua_gettable(L, index);
     SkScalar value = lua2scalar(L, -1);
     lua_pop(L, 1);
     return value;
 }
 static SkScalar getfield_scalar_default(lua_State* L, int index, const char key[], SkScalar def) {
     SkASSERT(lua_istable(L, index));
     lua_pushstring(L, key);
     lua_gettable(L, index);
     SkScalar value;
     if (lua_isnil(L, -1)) {
         value = def;
     } else {
         value = lua2scalar(L, -1);
     }
     lua_pop(L, 1);
     return value;
 }
 static U8CPU unit2byte(SkScalar x) {
     if (x <= 0) {
         return 0;
     } else if (x >= 1) {
         return 255;
     } else {
         return SkScalarRoundToInt(x * 255);
     }
 }
 static SkColor lua2color(lua_State* L, int index) {
     return SkColorSetARGB(unit2byte(getfield_scalar(L, index, "a")),
                           unit2byte(getfield_scalar(L, index, "r")),
                           unit2byte(getfield_scalar(L, index, "g")),
                           unit2byte(getfield_scalar(L, index, "b")));
 }
 static SkRect* lua2rect(lua_State* L, int index, SkRect* rect) {
     rect->set(getfield_scalar_default(L, index, "left", 0),
               getfield_scalar_default(L, index, "top", 0),
               getfield_scalar(L, index, "right"),
               getfield_scalar(L, index, "bottom"));
     return rect;
 }
 static int lcanvas_drawColor(lua_State* L) {
     get_ref<SkCanvas>(L, 1)->drawColor(lua2color(L, 2));
     return 0;
 }
 static int lcanvas_drawRect(lua_State* L) {
     SkRect rect;
     get_ref<SkCanvas>(L, 1)->drawRect(*lua2rect(L, 2, &rect),
                                       *get_obj<SkPaint>(L, 3));
     return 0;
 }
 static int lcanvas_drawOval(lua_State* L) {
     SkRect rect;
     get_ref<SkCanvas>(L, 1)->drawOval(*lua2rect(L, 2, &rect),
                                       *get_obj<SkPaint>(L, 3));
     return 0;
 }
 static int lcanvas_drawCircle(lua_State* L) {
     get_ref<SkCanvas>(L, 1)->drawCircle(lua2scalar(L, 2),
                                         lua2scalar(L, 3),
                                         lua2scalar(L, 4),
                                         *get_obj<SkPaint>(L, 5));
     return 0;
 }
 static int lcanvas_drawImage(lua_State* L) {
     SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
     SkImage* image = get_ref<SkImage>(L, 2);
     if (NULL == image) {
         return 0;
     }
     SkScalar x = lua2scalar(L, 3);
     SkScalar y = lua2scalar(L, 4);
     SkPaint paint;
     const SkPaint* paintPtr = NULL;
     if (lua_isnumber(L, 5)) {
         paint.setAlpha(SkScalarRoundToInt(lua2scalar(L, 5) * 255));
         paintPtr = &paint;
     }
     image->draw(canvas, x, y, paintPtr);
     return 0;
 }
 static int lcanvas_drawPath(lua_State* L) {
     get_ref<SkCanvas>(L, 1)->drawPath(*get_obj<SkPath>(L, 2),
                                       *get_obj<SkPaint>(L, 3));
     return 0;
 }
 static int lcanvas_drawText(lua_State* L) {
     if (lua_gettop(L) < 5) {
         return 0;
     }
     if (lua_isstring(L, 2) && lua_isnumber(L, 3) && lua_isnumber(L, 4)) {
         size_t len;
         const char* text = lua_tolstring(L, 2, &len);
         get_ref<SkCanvas>(L, 1)->drawText(text, len,
                                           lua2scalar(L, 3), lua2scalar(L, 4),
                                           *get_obj<SkPaint>(L, 5));
     }
     return 0;
 }
 static int lcanvas_getSaveCount(lua_State* L) {
     lua_pushnumber(L, get_ref<SkCanvas>(L, 1)->getSaveCount());
     return 1;
 }
 static int lcanvas_getTotalMatrix(lua_State* L) {
     SkLua(L).pushMatrix(get_ref<SkCanvas>(L, 1)->getTotalMatrix());
     return 1;
 }
 static int lcanvas_getClipStack(lua_State* L) {
     SkLua(L).pushClipStack(*get_ref<SkCanvas>(L, 1)->getClipStack());
     return 1;
 }
 int SkLua::lcanvas_getReducedClipStack(lua_State* L) {
 #if SK_SUPPORT_GPU
     const SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
     SkISize layerSize = canvas->getTopLayerSize();
     SkIPoint layerOrigin = canvas->getTopLayerOrigin();
     SkIRect queryBounds = SkIRect::MakeXYWH(layerOrigin.fX, layerOrigin.fY,
                                             layerSize.fWidth, layerSize.fHeight);
     GrReducedClip::ElementList elements;
     GrReducedClip::InitialState initialState;
     int32_t genID;
     SkIRect resultBounds;
     const SkClipStack& stack = *canvas->getClipStack();
     GrReducedClip::ReduceClipStack(stack,
                                    queryBounds,
                                    &elements,
                                    &genID,
                                    &initialState,
                                    &resultBounds,
                                    NULL);
     GrReducedClip::ElementList::Iter iter(elements);
     int i = 0;
     lua_newtable(L);
     while(NULL != iter.get()) {
         SkLua(L).pushClipStackElement(*iter.get());
         iter.next();
         lua_rawseti(L, -2, ++i);
     }
     // Currently this only returns the element list to lua, not the initial state or result bounds.
     // It could return these as additional items on the lua stack.
     return 1;
 #else
     return 0;
 #endif
 }
 static int lcanvas_save(lua_State* L) {
     lua_pushinteger(L, get_ref<SkCanvas>(L, 1)->save());
     return 1;
 }
 static int lcanvas_restore(lua_State* L) {
     get_ref<SkCanvas>(L, 1)->restore();
     return 0;
 }
 static int lcanvas_scale(lua_State* L) {
     SkScalar sx = lua2scalar_def(L, 2, 1);
     SkScalar sy = lua2scalar_def(L, 3, sx);
     get_ref<SkCanvas>(L, 1)->scale(sx, sy);
     return 0;
 }
 static int lcanvas_translate(lua_State* L) {
     SkScalar tx = lua2scalar_def(L, 2, 0);
     SkScalar ty = lua2scalar_def(L, 3, 0);
     get_ref<SkCanvas>(L, 1)->translate(tx, ty);
     return 0;
 }
 static int lcanvas_rotate(lua_State* L) {
     SkScalar degrees = lua2scalar_def(L, 2, 0);
     get_ref<SkCanvas>(L, 1)->rotate(degrees);
     return 0;
 }
 static int lcanvas_gc(lua_State* L) {
     get_ref<SkCanvas>(L, 1)->unref();
     return 0;
 }
 const struct luaL_Reg gSkCanvas_Methods[] = {
     { "drawColor", lcanvas_drawColor },
     { "drawRect", lcanvas_drawRect },
     { "drawOval", lcanvas_drawOval },
     { "drawCircle", lcanvas_drawCircle },
     { "drawImage", lcanvas_drawImage },
     { "drawPath", lcanvas_drawPath },
     { "drawText", lcanvas_drawText },
     { "getSaveCount", lcanvas_getSaveCount },
     { "getTotalMatrix", lcanvas_getTotalMatrix },
     { "getClipStack", lcanvas_getClipStack },
 #if SK_SUPPORT_GPU
     { "getReducedClipStack", SkLua::lcanvas_getReducedClipStack },
 #endif
     { "save", lcanvas_save },
     { "restore", lcanvas_restore },
     { "scale", lcanvas_scale },
     { "translate", lcanvas_translate },
     { "rotate", lcanvas_rotate },
     { "__gc", lcanvas_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static int ldocument_beginPage(lua_State* L) {
     const SkRect* contentPtr = NULL;
     push_ref(L, get_ref<SkDocument>(L, 1)->beginPage(lua2scalar(L, 2),
                                                      lua2scalar(L, 3),
                                                      contentPtr));
     return 1;
 }
 static int ldocument_endPage(lua_State* L) {
     get_ref<SkDocument>(L, 1)->endPage();
     return 0;
 }
 static int ldocument_close(lua_State* L) {
     get_ref<SkDocument>(L, 1)->close();
     return 0;
 }
 static int ldocument_gc(lua_State* L) {
     get_ref<SkDocument>(L, 1)->unref();
     return 0;
 }
 static const struct luaL_Reg gSkDocument_Methods[] = {
     { "beginPage", ldocument_beginPage },
     { "endPage", ldocument_endPage },
     { "close", ldocument_close },
     { "__gc", ldocument_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static int lpaint_isAntiAlias(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isAntiAlias());
     return 1;
 }
 static int lpaint_setAntiAlias(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setAntiAlias(lua2bool(L, 2));
     return 0;
 }
 static int lpaint_isDither(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isDither());
     return 1;
 }
 static int lpaint_isUnderlineText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isUnderlineText());
     return 1;
 }
 static int lpaint_isStrikeThruText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isStrikeThruText());
     return 1;
 }
 static int lpaint_isFakeBoldText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isFakeBoldText());
     return 1;
 }
 static int lpaint_isLinearText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isLinearText());
     return 1;
 }
 static int lpaint_isSubpixelText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isSubpixelText());
     return 1;
 }
 static int lpaint_isDevKernText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isDevKernText());
     return 1;
 }
 static int lpaint_isLCDRenderText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isLCDRenderText());
     return 1;
 }
 static int lpaint_isEmbeddedBitmapText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isEmbeddedBitmapText());
     return 1;
 }
 static int lpaint_isAutohinted(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isAutohinted());
     return 1;
 }
 static int lpaint_isVerticalText(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isVerticalText());
     return 1;
 }
 static int lpaint_getColor(lua_State* L) {
     SkLua(L).pushColor(get_obj<SkPaint>(L, 1)->getColor());
     return 1;
 }
 static int lpaint_setColor(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setColor(lua2color(L, 2));
     return 0;
 }
 static int lpaint_getTextSize(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextSize());
     return 1;
 }
 static int lpaint_getTextScaleX(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextScaleX());
     return 1;
 }
 static int lpaint_getTextSkewX(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextSkewX());
     return 1;
 }
 static int lpaint_setTextSize(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setTextSize(lua2scalar(L, 2));
     return 0;
 }
 static int lpaint_getTypeface(lua_State* L) {
     push_ref(L, get_obj<SkPaint>(L, 1)->getTypeface());
     return 1;
 }
 static int lpaint_setTypeface(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setTypeface(get_ref<SkTypeface>(L, 2));
     return 0;
 }
 static int lpaint_getHinting(lua_State* L) {
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getHinting());
     return 1;
 }
 static int lpaint_getFontID(lua_State* L) {
     SkTypeface* face = get_obj<SkPaint>(L, 1)->getTypeface();
     SkLua(L).pushU32(SkTypeface::UniqueID(face));
     return 1;
 }
 static const struct {
     const char*     fLabel;
     SkPaint::Align  fAlign;
 } gAlignRec[] = {
     { "left",   SkPaint::kLeft_Align },
     { "center", SkPaint::kCenter_Align },
     { "right",  SkPaint::kRight_Align },
 };
 static int lpaint_getTextAlign(lua_State* L) {
     SkPaint::Align align = get_obj<SkPaint>(L, 1)->getTextAlign();
     for (size_t i = 0; i < SK_ARRAY_COUNT(gAlignRec); ++i) {
         if (gAlignRec[i].fAlign == align) {
             lua_pushstring(L, gAlignRec[i].fLabel);
             return 1;
         }
     }
     return 0;
 }
 static int lpaint_setTextAlign(lua_State* L) {
     if (lua_isstring(L, 2)) {
         size_t len;
         const char* label = lua_tolstring(L, 2, &len);
         for (size_t i = 0; i < SK_ARRAY_COUNT(gAlignRec); ++i) {
             if (!strcmp(gAlignRec[i].fLabel, label)) {
                 get_obj<SkPaint>(L, 1)->setTextAlign(gAlignRec[i].fAlign);
                 break;
             }
         }
     }
     return 0;
 }
 static int lpaint_getStroke(lua_State* L) {
     lua_pushboolean(L, SkPaint::kStroke_Style == get_obj<SkPaint>(L, 1)->getStyle());
     return 1;
 }
 static int lpaint_setStroke(lua_State* L) {
     SkPaint::Style style;
     if (lua_toboolean(L, 2)) {
         style = SkPaint::kStroke_Style;
     } else {
         style = SkPaint::kFill_Style;
     }
     get_obj<SkPaint>(L, 1)->setStyle(style);
     return 0;
 }
 static int lpaint_getStrokeCap(lua_State* L) {
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeCap());
     return 1;
 }
 static int lpaint_getStrokeJoin(lua_State* L) {
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeJoin());
     return 1;
 }
 static int lpaint_getTextEncoding(lua_State* L) {
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getTextEncoding());
     return 1;
 }
 static int lpaint_getStrokeWidth(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getStrokeWidth());
     return 1;
 }
 static int lpaint_setStrokeWidth(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setStrokeWidth(lua2scalar(L, 2));
     return 0;
 }
 static int lpaint_getStrokeMiter(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getStrokeMiter());
     return 1;
 }
 static int lpaint_measureText(lua_State* L) {
     if (lua_isstring(L, 2)) {
         size_t len;
         const char* text = lua_tolstring(L, 2, &len);
         SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->measureText(text, len));
         return 1;
     }
     return 0;
 }
 struct FontMetrics {
     SkScalar    fTop;       //!< The greatest distance above the baseline for any glyph (will be <= 0)
     SkScalar    fAscent;    //!< The recommended distance above the baseline (will be <= 0)
     SkScalar    fDescent;   //!< The recommended distance below the baseline (will be >= 0)
     SkScalar    fBottom;    //!< The greatest distance below the baseline for any glyph (will be >= 0)
     SkScalar    fLeading;   //!< The recommended distance to add between lines of text (will be >= 0)
     SkScalar    fAvgCharWidth;  //!< the average charactor width (>= 0)
     SkScalar    fXMin;      //!< The minimum bounding box x value for all glyphs
     SkScalar    fXMax;      //!< The maximum bounding box x value for all glyphs
     SkScalar    fXHeight;   //!< the height of an 'x' in px, or 0 if no 'x' in face
 };
 static int lpaint_getFontMetrics(lua_State* L) {
     SkPaint::FontMetrics fm;
     SkScalar height = get_obj<SkPaint>(L, 1)->getFontMetrics(&fm);
     lua_newtable(L);
     setfield_scalar(L, "top", fm.fTop);
     setfield_scalar(L, "ascent", fm.fAscent);
     setfield_scalar(L, "descent", fm.fDescent);
     setfield_scalar(L, "bottom", fm.fBottom);
     setfield_scalar(L, "leading", fm.fLeading);
     SkLua(L).pushScalar(height);
     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_getShader(lua_State* L) {
     const SkPaint* paint = get_obj<SkPaint>(L, 1);
     SkShader* shader = paint->getShader();
     if (shader) {
         push_ref(L, shader);
         return 1;
     }
     return 0;
 }
 static int lpaint_gc(lua_State* L) {
     get_obj<SkPaint>(L, 1)->~SkPaint();
     return 0;
 }
 static const struct luaL_Reg gSkPaint_Methods[] = {
     { "isAntiAlias", lpaint_isAntiAlias },
     { "setAntiAlias", lpaint_setAntiAlias },
     { "isDither", lpaint_isDither },
     { "isUnderlineText", lpaint_isUnderlineText },
     { "isStrikeThruText", lpaint_isStrikeThruText },
     { "isFakeBoldText", lpaint_isFakeBoldText },
     { "isLinearText", lpaint_isLinearText },
     { "isSubpixelText", lpaint_isSubpixelText },
     { "isDevKernText", lpaint_isDevKernText },
     { "isLCDRenderText", lpaint_isLCDRenderText },
     { "isEmbeddedBitmapText", lpaint_isEmbeddedBitmapText },
     { "isAutohinted", lpaint_isAutohinted },
     { "isVerticalText", lpaint_isVerticalText },
     { "getColor", lpaint_getColor },
     { "setColor", lpaint_setColor },
     { "getTextSize", lpaint_getTextSize },
     { "setTextSize", lpaint_setTextSize },
     { "getTextScaleX", lpaint_getTextScaleX },
     { "getTextSkewX", lpaint_getTextSkewX },
     { "getTypeface", lpaint_getTypeface },
     { "setTypeface", lpaint_setTypeface },
     { "getHinting", lpaint_getHinting },
     { "getFontID", lpaint_getFontID },
     { "getTextAlign", lpaint_getTextAlign },
     { "setTextAlign", lpaint_setTextAlign },
     { "getStroke", lpaint_getStroke },
     { "setStroke", lpaint_setStroke },
     { "getStrokeCap", lpaint_getStrokeCap },
     { "getStrokeJoin", lpaint_getStrokeJoin },
     { "getTextEncoding", lpaint_getTextEncoding },
     { "getStrokeWidth", lpaint_getStrokeWidth },
     { "setStrokeWidth", lpaint_setStrokeWidth },
     { "getStrokeMiter", lpaint_getStrokeMiter },
     { "measureText", lpaint_measureText },
     { "getFontMetrics", lpaint_getFontMetrics },
     { "getEffects", lpaint_getEffects },
     { "getShader", lpaint_getShader },
     { "__gc", lpaint_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static const char* mode2string(SkShader::TileMode mode) {
     static const char* gNames[] = { "clamp", "repeat", "mirror" };
     SkASSERT((unsigned)mode < SK_ARRAY_COUNT(gNames));
     return gNames[mode];
 }
 static const char* gradtype2string(SkShader::GradientType t) {
     static const char* gNames[] = {
         "none", "color", "linear", "radial", "radial2", "sweep", "conical"
     };
     SkASSERT((unsigned)t < SK_ARRAY_COUNT(gNames));
     return gNames[t];
 }
 static int lshader_isOpaque(lua_State* L) {
     SkShader* shader = get_ref<SkShader>(L, 1);
     return shader && shader->isOpaque();
 }
 static int lshader_asABitmap(lua_State* L) {
     SkShader* shader = get_ref<SkShader>(L, 1);
     if (shader) {
         SkBitmap bm;
         SkMatrix matrix;
         SkShader::TileMode modes[2];
         switch (shader->asABitmap(&bm, &matrix, modes)) {
             case SkShader::kDefault_BitmapType:
                 lua_newtable(L);
                 setfield_number(L, "genID", bm.pixelRef() ? bm.pixelRef()->getGenerationID() : 0);
                 setfield_number(L, "width", bm.width());
                 setfield_number(L, "height", bm.height());
                 setfield_string(L, "tileX", mode2string(modes[0]));
                 setfield_string(L, "tileY", mode2string(modes[1]));
                 return 1;
             default:
                 break;
         }
     }
     return 0;
 }
 static int lshader_asAGradient(lua_State* L) {
     SkShader* shader = get_ref<SkShader>(L, 1);
     if (shader) {
         SkShader::GradientInfo info;
         sk_bzero(&info, sizeof(info));
         SkColor colors[3];  // hacked in for extracting info on 3 color case.
         SkScalar pos[3];
         info.fColorCount = 3;
         info.fColors = &colors[0];
         info.fColorOffsets = &pos[0];
         SkShader::GradientType t = shader->asAGradient(&info);
         if (SkShader::kNone_GradientType != t) {
             lua_newtable(L);
             setfield_string(L, "type", gradtype2string(t));
             setfield_number(L, "colorCount", info.fColorCount);
             setfield_string(L, "tile", mode2string(info.fTileMode));
             if (info.fColorCount == 3){
                 setfield_number(L, "midPos", pos[1]);
             }
             return 1;
         }
     }
     return 0;
 }
 static int lshader_gc(lua_State* L) {
     get_ref<SkShader>(L, 1)->unref();
     return 0;
 }
 static const struct luaL_Reg gSkShader_Methods[] = {
     { "isOpaque",       lshader_isOpaque },
     { "asABitmap",      lshader_asABitmap },
     { "asAGradient",    lshader_asAGradient },
     { "__gc",           lshader_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 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 int lmatrix_getScaleX(lua_State* L) {
     lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getScaleX());
     return 1;
 }
 static int lmatrix_getScaleY(lua_State* L) {
     lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getScaleY());
     return 1;
 }
 static int lmatrix_getTranslateX(lua_State* L) {
     lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getTranslateX());
     return 1;
 }
 static int lmatrix_getTranslateY(lua_State* L) {
     lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getTranslateY());
     return 1;
 }
 static const struct luaL_Reg gSkMatrix_Methods[] = {
     { "getType", lmatrix_getType },
     { "getScaleX", lmatrix_getScaleX },
     { "getScaleY", lmatrix_getScaleY },
     { "getTranslateX", lmatrix_getTranslateX },
     { "getTranslateY", lmatrix_getTranslateY },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static int lpath_getBounds(lua_State* L) {
     SkLua(L).pushRect(get_obj<SkPath>(L, 1)->getBounds());
     return 1;
 }
 static const char* fill_type_to_str(SkPath::FillType fill) {
     switch (fill) {
         case SkPath::kEvenOdd_FillType:
             return "even-odd";
         case SkPath::kWinding_FillType:
             return "winding";
         case SkPath::kInverseEvenOdd_FillType:
             return "inverse-even-odd";
         case SkPath::kInverseWinding_FillType:
             return "inverse-winding";
     }
     return "unknown";
 }
 static int lpath_getFillType(lua_State* L) {
     SkPath::FillType fill = get_obj<SkPath>(L, 1)->getFillType();
     SkLua(L).pushString(fill_type_to_str(fill));
     return 1;
 }
 static SkString segment_masks_to_str(uint32_t segmentMasks) {
     SkString result;
     bool first = true;
     if (SkPath::kLine_SegmentMask & segmentMasks) {
         result.append("line");
         first = false;
         SkDEBUGCODE(segmentMasks &= ~SkPath::kLine_SegmentMask;)
     }
     if (SkPath::kQuad_SegmentMask & segmentMasks) {
         if (!first) {
             result.append(" ");
         }
         result.append("quad");
         first = false;
         SkDEBUGCODE(segmentMasks &= ~SkPath::kQuad_SegmentMask;)
     }
     if (SkPath::kConic_SegmentMask & segmentMasks) {
         if (!first) {
             result.append(" ");
         }
         result.append("conic");
         first = false;
         SkDEBUGCODE(segmentMasks &= ~SkPath::kConic_SegmentMask;)
     }
     if (SkPath::kCubic_SegmentMask & segmentMasks) {
         if (!first) {
             result.append(" ");
         }
         result.append("cubic");
         SkDEBUGCODE(segmentMasks &= ~SkPath::kCubic_SegmentMask;)
     }
     SkASSERT(0 == segmentMasks);
     return result;
 }
 static int lpath_getSegementTypes(lua_State* L) {
     uint32_t segMasks = get_obj<SkPath>(L, 1)->getSegmentMasks();
     SkLua(L).pushString(segment_masks_to_str(segMasks));
     return 1;
 }
 static int lpath_isConvex(lua_State* L) {
     bool isConvex = SkPath::kConvex_Convexity == get_obj<SkPath>(L, 1)->getConvexity();
     SkLua(L).pushBool(isConvex);
     return 1;
 }
 static int lpath_isEmpty(lua_State* L) {
     lua_pushboolean(L, get_obj<SkPath>(L, 1)->isEmpty());
     return 1;
 }
 static int lpath_isRect(lua_State* L) {
     SkRect r;
     bool pred = get_obj<SkPath>(L, 1)->isRect(&r);
     int ret_count = 1;
     lua_pushboolean(L, pred);
     if (pred) {
         SkLua(L).pushRect(r);
         ret_count += 1;
     }
     return ret_count;
 }
 static const char* dir2string(SkPath::Direction dir) {
     static const char* gStr[] = {
         "unknown", "cw", "ccw"
     };
     SkASSERT((unsigned)dir < SK_ARRAY_COUNT(gStr));
     return gStr[dir];
 }
 static int lpath_isNestedRects(lua_State* L) {
     SkRect rects[2];
     SkPath::Direction dirs[2];
     bool pred = get_obj<SkPath>(L, 1)->isNestedRects(rects, dirs);
     int ret_count = 1;
     lua_pushboolean(L, pred);
     if (pred) {
         SkLua lua(L);
         lua.pushRect(rects[0]);
         lua.pushRect(rects[1]);
         lua_pushstring(L, dir2string(dirs[0]));
         lua_pushstring(L, dir2string(dirs[0]));
         ret_count += 4;
     }
     return ret_count;
 }
 static int lpath_countPoints(lua_State* L) {
     lua_pushinteger(L, get_obj<SkPath>(L, 1)->countPoints());
     return 1;
 }
 static int lpath_reset(lua_State* L) {
     get_obj<SkPath>(L, 1)->reset();
     return 0;
 }
 static int lpath_moveTo(lua_State* L) {
     get_obj<SkPath>(L, 1)->moveTo(lua2scalar(L, 2), lua2scalar(L, 3));
     return 0;
 }
 static int lpath_lineTo(lua_State* L) {
     get_obj<SkPath>(L, 1)->lineTo(lua2scalar(L, 2), lua2scalar(L, 3));
     return 0;
 }
 static int lpath_quadTo(lua_State* L) {
     get_obj<SkPath>(L, 1)->quadTo(lua2scalar(L, 2), lua2scalar(L, 3),
                                   lua2scalar(L, 4), lua2scalar(L, 5));
     return 0;
 }
 static int lpath_cubicTo(lua_State* L) {
     get_obj<SkPath>(L, 1)->cubicTo(lua2scalar(L, 2), lua2scalar(L, 3),
                                    lua2scalar(L, 4), lua2scalar(L, 5),
                                    lua2scalar(L, 6), lua2scalar(L, 7));
     return 0;
 }
 static int lpath_close(lua_State* L) {
     get_obj<SkPath>(L, 1)->close();
     return 0;
 }
 static int lpath_gc(lua_State* L) {
     get_obj<SkPath>(L, 1)->~SkPath();
     return 0;
 }
 static const struct luaL_Reg gSkPath_Methods[] = {
     { "getBounds", lpath_getBounds },
     { "getFillType", lpath_getFillType },
     { "getSegmentTypes", lpath_getSegementTypes },
     { "isConvex", lpath_isConvex },
     { "isEmpty", lpath_isEmpty },
     { "isRect", lpath_isRect },
     { "isNestedRects", lpath_isNestedRects },
     { "countPoints", lpath_countPoints },
     { "reset", lpath_reset },
     { "moveTo", lpath_moveTo },
     { "lineTo", lpath_lineTo },
     { "quadTo", lpath_quadTo },
     { "cubicTo", lpath_cubicTo },
     { "close", lpath_close },
     { "__gc", lpath_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static const char* rrect_type(const SkRRect& rr) {
     switch (rr.getType()) {
         case SkRRect::kUnknown_Type: return "unknown";
         case SkRRect::kEmpty_Type: return "empty";
         case SkRRect::kRect_Type: return "rect";
         case SkRRect::kOval_Type: return "oval";
         case SkRRect::kSimple_Type: return "simple";
         case SkRRect::kComplex_Type: return "complex";
     }
     SkDEBUGFAIL("never get here");
     return "";
 }
 static int lrrect_rect(lua_State* L) {
     SkLua(L).pushRect(get_obj<SkRRect>(L, 1)->rect());
     return 1;
 }
 static int lrrect_type(lua_State* L) {
     lua_pushstring(L, rrect_type(*get_obj<SkRRect>(L, 1)));
     return 1;
 }
 static int lrrect_radii(lua_State* L) {
     int corner = SkToInt(lua_tointeger(L, 2));
     SkVector v;
     if (corner < 0 || corner > 3) {
         SkDebugf("bad corner index %d", corner);
         v.set(0, 0);
     } else {
         v = get_obj<SkRRect>(L, 1)->radii((SkRRect::Corner)corner);
     }
     lua_pushnumber(L, v.fX);
     lua_pushnumber(L, v.fY);
     return 2;
 }
 static int lrrect_gc(lua_State* L) {
     get_obj<SkRRect>(L, 1)->~SkRRect();
     return 0;
 }
 static const struct luaL_Reg gSkRRect_Methods[] = {
     { "rect", lrrect_rect },
     { "type", lrrect_type },
     { "radii", lrrect_radii },
     { "__gc", lrrect_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static int limage_width(lua_State* L) {
     lua_pushinteger(L, get_ref<SkImage>(L, 1)->width());
     return 1;
 }
 static int limage_height(lua_State* L) {
     lua_pushinteger(L, get_ref<SkImage>(L, 1)->height());
     return 1;
 }
 static int limage_gc(lua_State* L) {
     get_ref<SkImage>(L, 1)->unref();
     return 0;
 }
 static const struct luaL_Reg gSkImage_Methods[] = {
     { "width", limage_width },
     { "height", limage_height },
     { "__gc", limage_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 static int ltypeface_gc(lua_State* L) {
     SkSafeUnref(get_ref<SkTypeface>(L, 1));
     return 0;
 }
 static const struct luaL_Reg gSkTypeface_Methods[] = {
     { "__gc", ltypeface_gc },
     { NULL, NULL }
 };
 ///////////////////////////////////////////////////////////////////////////////
 class AutoCallLua {
 public:
     AutoCallLua(lua_State* L, const char func[], const char verb[]) : fL(L) {
         lua_getglobal(L, func);
         if (!lua_isfunction(L, -1)) {
             int t = lua_type(L, -1);
             SkDebugf("--- expected function %d\n", t);
         }
         lua_newtable(L);
         setfield_string(L, "verb", verb);
     }
     ~AutoCallLua() {
         if (lua_pcall(fL, 1, 0, 0) != LUA_OK) {
             SkDebugf("lua err: %s\n", lua_tostring(fL, -1));
         }
         lua_settop(fL, -1);
     }
 private:
     lua_State* fL;
 };
 #define AUTO_LUA(verb)  AutoCallLua acl(fL, fFunc.c_str(), verb)
 ///////////////////////////////////////////////////////////////////////////////
 static int lsk_newDocumentPDF(lua_State* L) {
     const char* file = NULL;
     if (lua_gettop(L) > 0 && lua_isstring(L, 1)) {
         file = lua_tolstring(L, 1, NULL);
     }
     SkDocument* doc = SkDocument::CreatePDF(file);
     if (NULL == doc) {
         // do I need to push a nil on the stack and return 1?
         return 0;
     } else {
         push_ref(L, doc);
         doc->unref();
         return 1;
     }
 }
 static int lsk_newPaint(lua_State* L) {
     push_new<SkPaint>(L);
     return 1;
 }
 static int lsk_newPath(lua_State* L) {
     push_new<SkPath>(L);
     return 1;
 }
 static int lsk_newRRect(lua_State* L) {
     SkRRect* rr = push_new<SkRRect>(L);
     rr->setEmpty();
     return 1;
 }
 static int lsk_newTypeface(lua_State* L) {
     const char* name = NULL;
     int style = SkTypeface::kNormal;
     int count = lua_gettop(L);
     if (count > 0 && lua_isstring(L, 1)) {
         name = lua_tolstring(L, 1, NULL);
         if (count > 1 && lua_isnumber(L, 2)) {
             style = lua_tointegerx(L, 2, NULL) & SkTypeface::kBoldItalic;
         }
     }
     SkTypeface* face = SkTypeface::CreateFromName(name,
                                                   (SkTypeface::Style)style);
 //    SkDebugf("---- name <%s> style=%d, face=%p ref=%d\n", name, style, face, face->getRefCnt());
     if (NULL == face) {
         face = SkTypeface::RefDefault();
     }
     push_ref(L, face);
     face->unref();
     return 1;
 }
 static int lsk_loadImage(lua_State* L) {
     if (lua_gettop(L) > 0 && lua_isstring(L, 1)) {
         const char* name = lua_tolstring(L, 1, NULL);
         SkAutoDataUnref data(SkData::NewFromFileName(name));
         if (data.get()) {
             SkImage* image = SkImage::NewEncodedData(data.get());
             if (image) {
                 push_ref(L, image);
                 image->unref();
                 return 1;
             }
         }
     }
     return 0;
 }
 static void register_Sk(lua_State* L) {
     lua_newtable(L);
     lua_pushvalue(L, -1);
     lua_setglobal(L, "Sk");
     // the Sk table is still on top
     setfield_function(L, "newDocumentPDF", lsk_newDocumentPDF);
     setfield_function(L, "loadImage", lsk_loadImage);
     setfield_function(L, "newPaint", lsk_newPaint);
     setfield_function(L, "newPath", lsk_newPath);
     setfield_function(L, "newRRect", lsk_newRRect);
     setfield_function(L, "newTypeface", lsk_newTypeface);
     lua_pop(L, 1);  // pop off the Sk table
 }
 #define REG_CLASS(L, C)                             \
     do {                                            \
         luaL_newmetatable(L, get_mtname<C>());      \
         lua_pushvalue(L, -1);                       \
         lua_setfield(L, -2, "__index");             \
         luaL_setfuncs(L, g##C##_Methods, 0);        \
         lua_pop(L, 1); /* pop off the meta-table */ \
     } while (0)
 void SkLua::Load(lua_State* L) {
     register_Sk(L);
     REG_CLASS(L, SkCanvas);
     REG_CLASS(L, SkDocument);
     REG_CLASS(L, SkImage);
     REG_CLASS(L, SkPath);
     REG_CLASS(L, SkPaint);
     REG_CLASS(L, SkRRect);
     REG_CLASS(L, SkShader);
     REG_CLASS(L, SkTypeface);
     REG_CLASS(L, SkMatrix);
 }
 extern "C" int luaopen_skia(lua_State* L);
 extern "C" int luaopen_skia(lua_State* L) {
     SkLua::Load(L);
     return 0;
 }

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gfx/skia/trunk/src/utils/SkLua.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkLua.cpp