reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkLua.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkPaint.h" |
| 11 | #include "SkPath.h" |
| 12 | #include "SkMatrix.h" |
| 13 | #include "SkRRect.h" |
| 14 | #include "SkString.h" |
| 15 | |
| 16 | extern "C" { |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 17 | #include "lua.h" |
| 18 | #include "lualib.h" |
| 19 | #include "lauxlib.h" |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 20 | } |
| 21 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 22 | template <typename T> const char* get_mtname(); |
| 23 | template <> const char* get_mtname<SkCanvas>() { return "SkCanvas_LuaMetaTableName"; } |
| 24 | template <> const char* get_mtname<SkMatrix>() { return "SkMatrix_LuaMetaTableName"; } |
| 25 | template <> const char* get_mtname<SkRRect>() { return "SkSkRRect_LuaMetaTableName"; } |
| 26 | template <> const char* get_mtname<SkPath>() { return "SkPath_LuaMetaTableName"; } |
| 27 | template <> const char* get_mtname<SkPaint>() { return "SkPaint_LuaMetaTableName"; } |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 28 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 29 | template <typename T> T* push_new(lua_State* L) { |
| 30 | T* addr = (T*)lua_newuserdata(L, sizeof(T)); |
| 31 | new (addr) T; |
| 32 | luaL_getmetatable(L, get_mtname<T>()); |
| 33 | lua_setmetatable(L, -2); |
| 34 | return addr; |
| 35 | } |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 36 | |
| 37 | template <typename T> void push_obj(lua_State* L, const T& obj) { |
| 38 | new (lua_newuserdata(L, sizeof(T))) T(obj); |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 39 | luaL_getmetatable(L, get_mtname<T>()); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 40 | lua_setmetatable(L, -2); |
| 41 | } |
| 42 | |
| 43 | template <typename T> void push_ref(lua_State* L, T* ref) { |
| 44 | *(T**)lua_newuserdata(L, sizeof(T*)) = SkRef(ref); |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 45 | luaL_getmetatable(L, get_mtname<T>()); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 46 | lua_setmetatable(L, -2); |
| 47 | } |
| 48 | |
| 49 | template <typename T> T* get_ref(lua_State* L, int index) { |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 50 | return *(T**)luaL_checkudata(L, index, get_mtname<T>()); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | template <typename T> T* get_obj(lua_State* L, int index) { |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 54 | return (T*)luaL_checkudata(L, index, get_mtname<T>()); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 55 | } |
| 56 | |
reed@google.com | 88c9ec9 | 2013-05-22 15:43:21 +0000 | [diff] [blame] | 57 | static bool lua2bool(lua_State* L, int index) { |
| 58 | return !!lua_toboolean(L, index); |
| 59 | } |
| 60 | |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 61 | /////////////////////////////////////////////////////////////////////////////// |
| 62 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 63 | SkLua::SkLua(const char termCode[]) : fTermCode(termCode), fWeOwnL(true) { |
| 64 | fL = luaL_newstate(); |
| 65 | luaL_openlibs(fL); |
| 66 | SkLua::Load(fL); |
| 67 | } |
| 68 | |
| 69 | SkLua::SkLua(lua_State* L) : fL(L), fWeOwnL(false) {} |
| 70 | |
| 71 | SkLua::~SkLua() { |
| 72 | if (fWeOwnL) { |
| 73 | if (fTermCode.size() > 0) { |
| 74 | lua_getglobal(fL, fTermCode.c_str()); |
| 75 | if (lua_pcall(fL, 0, 0, 0) != LUA_OK) { |
| 76 | SkDebugf("lua err: %s\n", lua_tostring(fL, -1)); |
| 77 | } |
| 78 | } |
| 79 | lua_close(fL); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | bool SkLua::runCode(const char code[]) { |
| 84 | int err = luaL_loadstring(fL, code) || lua_pcall(fL, 0, 0, 0); |
| 85 | if (err) { |
| 86 | SkDebugf("--- lua failed\n"); |
| 87 | return false; |
| 88 | } |
| 89 | return true; |
| 90 | } |
| 91 | |
| 92 | bool SkLua::runCode(const void* code, size_t size) { |
| 93 | SkString str((const char*)code, size); |
| 94 | return this->runCode(str.c_str()); |
| 95 | } |
| 96 | |
| 97 | /////////////////////////////////////////////////////////////////////////////// |
| 98 | |
| 99 | #define CHECK_SETFIELD(key) do if (key) lua_setfield(fL, -2, key); while (0) |
| 100 | |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 101 | static void setfield_string(lua_State* L, const char key[], const char value[]) { |
| 102 | lua_pushstring(L, value); |
| 103 | lua_setfield(L, -2, key); |
| 104 | } |
| 105 | |
| 106 | static void setfield_number(lua_State* L, const char key[], double value) { |
| 107 | lua_pushnumber(L, value); |
| 108 | lua_setfield(L, -2, key); |
| 109 | } |
| 110 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 111 | static void setfield_function(lua_State* L, |
| 112 | const char key[], lua_CFunction value) { |
| 113 | lua_pushcfunction(L, value); |
| 114 | lua_setfield(L, -2, key); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 115 | } |
| 116 | |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 117 | void SkLua::pushBool(bool value, const char key[]) { |
| 118 | lua_pushboolean(fL, value); |
| 119 | CHECK_SETFIELD(key); |
| 120 | } |
| 121 | |
| 122 | void SkLua::pushString(const char str[], const char key[]) { |
| 123 | lua_pushstring(fL, str); |
| 124 | CHECK_SETFIELD(key); |
| 125 | } |
| 126 | |
| 127 | void SkLua::pushString(const SkString& str, const char key[]) { |
| 128 | lua_pushstring(fL, str.c_str()); |
| 129 | CHECK_SETFIELD(key); |
| 130 | } |
| 131 | |
| 132 | void SkLua::pushColor(SkColor color, const char key[]) { |
| 133 | lua_newtable(fL); |
| 134 | setfield_number(fL, "a", SkColorGetA(color) / 255.0); |
| 135 | setfield_number(fL, "r", SkColorGetR(color) / 255.0); |
| 136 | setfield_number(fL, "g", SkColorGetG(color) / 255.0); |
| 137 | setfield_number(fL, "b", SkColorGetB(color) / 255.0); |
| 138 | CHECK_SETFIELD(key); |
| 139 | } |
| 140 | |
| 141 | void SkLua::pushScalar(SkScalar value, const char key[]) { |
| 142 | lua_pushnumber(fL, SkScalarToLua(value)); |
| 143 | CHECK_SETFIELD(key); |
| 144 | } |
| 145 | |
| 146 | void SkLua::pushRect(const SkRect& r, const char key[]) { |
| 147 | lua_newtable(fL); |
| 148 | setfield_number(fL, "left", SkScalarToLua(r.fLeft)); |
| 149 | setfield_number(fL, "top", SkScalarToLua(r.fTop)); |
| 150 | setfield_number(fL, "right", SkScalarToLua(r.fRight)); |
| 151 | setfield_number(fL, "bottom", SkScalarToLua(r.fBottom)); |
| 152 | CHECK_SETFIELD(key); |
| 153 | } |
| 154 | |
| 155 | void SkLua::pushRRect(const SkRRect& rr, const char key[]) { |
| 156 | push_obj(fL, rr); |
| 157 | CHECK_SETFIELD(key); |
| 158 | } |
| 159 | |
| 160 | void SkLua::pushMatrix(const SkMatrix& matrix, const char key[]) { |
| 161 | push_obj(fL, matrix); |
| 162 | CHECK_SETFIELD(key); |
| 163 | } |
| 164 | |
| 165 | void SkLua::pushPaint(const SkPaint& paint, const char key[]) { |
| 166 | push_obj(fL, paint); |
| 167 | CHECK_SETFIELD(key); |
| 168 | } |
| 169 | |
| 170 | void SkLua::pushPath(const SkPath& path, const char key[]) { |
| 171 | push_obj(fL, path); |
| 172 | CHECK_SETFIELD(key); |
| 173 | } |
| 174 | |
| 175 | void SkLua::pushCanvas(SkCanvas* canvas, const char key[]) { |
| 176 | push_ref(fL, canvas); |
| 177 | CHECK_SETFIELD(key); |
| 178 | } |
| 179 | |
| 180 | /////////////////////////////////////////////////////////////////////////////// |
| 181 | /////////////////////////////////////////////////////////////////////////////// |
| 182 | |
| 183 | static SkScalar lua2scalar(lua_State* L, int index) { |
| 184 | SkASSERT(lua_isnumber(L, index)); |
| 185 | return SkLuaToScalar(lua_tonumber(L, index)); |
| 186 | } |
| 187 | |
| 188 | static SkScalar getfield_scalar(lua_State* L, int index, const char key[]) { |
| 189 | SkASSERT(lua_istable(L, index)); |
| 190 | lua_pushstring(L, key); |
| 191 | lua_gettable(L, index); |
| 192 | |
| 193 | SkScalar value = lua2scalar(L, -1); |
| 194 | lua_pop(L, 1); |
| 195 | return value; |
| 196 | } |
| 197 | |
| 198 | static U8CPU unit2byte(SkScalar x) { |
| 199 | if (x <= 0) { |
| 200 | return 0; |
| 201 | } else if (x >= 1) { |
| 202 | return 255; |
| 203 | } else { |
| 204 | return SkScalarRoundToInt(x * 255); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | static SkColor lua2color(lua_State* L, int index) { |
| 209 | return SkColorSetARGB(unit2byte(getfield_scalar(L, index, "a")), |
| 210 | unit2byte(getfield_scalar(L, index, "r")), |
| 211 | unit2byte(getfield_scalar(L, index, "g")), |
| 212 | unit2byte(getfield_scalar(L, index, "b"))); |
| 213 | } |
| 214 | |
| 215 | static SkRect* lua2rect(lua_State* L, int index, SkRect* rect) { |
| 216 | rect->set(getfield_scalar(L, index, "left"), |
| 217 | getfield_scalar(L, index, "top"), |
| 218 | getfield_scalar(L, index, "right"), |
| 219 | getfield_scalar(L, index, "bottom")); |
| 220 | return rect; |
| 221 | } |
| 222 | |
| 223 | static int lcanvas_drawColor(lua_State* L) { |
| 224 | get_ref<SkCanvas>(L, 1)->drawColor(lua2color(L, 2)); |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static int lcanvas_drawRect(lua_State* L) { |
| 229 | SkRect rect; |
| 230 | get_ref<SkCanvas>(L, 1)->drawRect(*lua2rect(L, 2, &rect), |
| 231 | *get_obj<SkPaint>(L, 3)); |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int lcanvas_drawOval(lua_State* L) { |
| 236 | SkRect rect; |
| 237 | get_ref<SkCanvas>(L, 1)->drawOval(*lua2rect(L, 2, &rect), |
| 238 | *get_obj<SkPaint>(L, 3)); |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | static int lcanvas_drawCircle(lua_State* L) { |
| 243 | get_ref<SkCanvas>(L, 1)->drawCircle(lua2scalar(L, 2), |
| 244 | lua2scalar(L, 3), |
| 245 | lua2scalar(L, 4), |
| 246 | *get_obj<SkPaint>(L, 5)); |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | static int lcanvas_getSaveCount(lua_State* L) { |
| 251 | lua_pushnumber(L, get_ref<SkCanvas>(L, 1)->getSaveCount()); |
| 252 | return 1; |
| 253 | } |
| 254 | |
| 255 | static int lcanvas_getTotalMatrix(lua_State* L) { |
| 256 | SkLua(L).pushMatrix(get_ref<SkCanvas>(L, 1)->getTotalMatrix()); |
| 257 | return 1; |
| 258 | } |
| 259 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 260 | static int lcanvas_translate(lua_State* L) { |
| 261 | get_ref<SkCanvas>(L, 1)->translate(lua2scalar(L, 2), lua2scalar(L, 3)); |
| 262 | return 0; |
| 263 | } |
| 264 | |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 265 | static int lcanvas_gc(lua_State* L) { |
| 266 | get_ref<SkCanvas>(L, 1)->unref(); |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static const struct luaL_Reg gSkCanvas_Methods[] = { |
| 271 | { "drawColor", lcanvas_drawColor }, |
| 272 | { "drawRect", lcanvas_drawRect }, |
| 273 | { "drawOval", lcanvas_drawOval }, |
| 274 | { "drawCircle", lcanvas_drawCircle }, |
| 275 | { "getSaveCount", lcanvas_getSaveCount }, |
| 276 | { "getTotalMatrix", lcanvas_getTotalMatrix }, |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 277 | { "translate", lcanvas_translate }, |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 278 | { "__gc", lcanvas_gc }, |
| 279 | { NULL, NULL } |
| 280 | }; |
| 281 | |
| 282 | /////////////////////////////////////////////////////////////////////////////// |
| 283 | |
| 284 | static int lpaint_isAntiAlias(lua_State* L) { |
| 285 | lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isAntiAlias()); |
| 286 | return 1; |
| 287 | } |
| 288 | |
| 289 | static int lpaint_setAntiAlias(lua_State* L) { |
reed@google.com | 88c9ec9 | 2013-05-22 15:43:21 +0000 | [diff] [blame] | 290 | get_obj<SkPaint>(L, 1)->setAntiAlias(lua2bool(L, 2)); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | static int lpaint_getColor(lua_State* L) { |
| 295 | SkLua(L).pushColor(get_obj<SkPaint>(L, 1)->getColor()); |
| 296 | return 1; |
| 297 | } |
| 298 | |
| 299 | static int lpaint_setColor(lua_State* L) { |
| 300 | get_obj<SkPaint>(L, 1)->setColor(lua2color(L, 2)); |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | static int lpaint_gc(lua_State* L) { |
| 305 | get_obj<SkPaint>(L, 1)->~SkPaint(); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static const struct luaL_Reg gSkPaint_Methods[] = { |
| 310 | { "isAntiAlias", lpaint_isAntiAlias }, |
| 311 | { "setAntiAlias", lpaint_setAntiAlias }, |
| 312 | { "getColor", lpaint_getColor }, |
| 313 | { "setColor", lpaint_setColor }, |
| 314 | { "__gc", lpaint_gc }, |
| 315 | { NULL, NULL } |
| 316 | }; |
| 317 | |
| 318 | /////////////////////////////////////////////////////////////////////////////// |
| 319 | |
| 320 | static int lpath_getBounds(lua_State* L) { |
| 321 | SkLua(L).pushRect(get_obj<SkPath>(L, 1)->getBounds()); |
| 322 | return 1; |
| 323 | } |
| 324 | |
| 325 | static int lpath_isEmpty(lua_State* L) { |
| 326 | lua_pushboolean(L, get_obj<SkPath>(L, 1)->isEmpty()); |
| 327 | return 1; |
| 328 | } |
| 329 | |
| 330 | static int lpath_isRect(lua_State* L) { |
| 331 | SkRect r; |
| 332 | bool pred = get_obj<SkPath>(L, 1)->isRect(&r); |
| 333 | int ret_count = 1; |
| 334 | lua_pushboolean(L, pred); |
| 335 | if (pred) { |
| 336 | SkLua(L).pushRect(r); |
| 337 | ret_count += 1; |
| 338 | } |
| 339 | return ret_count; |
| 340 | } |
| 341 | |
| 342 | static const char* dir2string(SkPath::Direction dir) { |
| 343 | static const char* gStr[] = { |
| 344 | "unknown", "cw", "ccw" |
| 345 | }; |
| 346 | SkASSERT((unsigned)dir < SK_ARRAY_COUNT(gStr)); |
| 347 | return gStr[dir]; |
| 348 | } |
| 349 | |
| 350 | static int lpath_isNestedRects(lua_State* L) { |
| 351 | SkRect rects[2]; |
| 352 | SkPath::Direction dirs[2]; |
| 353 | bool pred = get_obj<SkPath>(L, 1)->isNestedRects(rects, dirs); |
| 354 | int ret_count = 1; |
| 355 | lua_pushboolean(L, pred); |
| 356 | if (pred) { |
| 357 | SkLua lua(L); |
| 358 | lua.pushRect(rects[0]); |
| 359 | lua.pushRect(rects[1]); |
| 360 | lua_pushstring(L, dir2string(dirs[0])); |
| 361 | lua_pushstring(L, dir2string(dirs[0])); |
| 362 | ret_count += 4; |
| 363 | } |
| 364 | return ret_count; |
| 365 | } |
| 366 | |
| 367 | static int lpath_reset(lua_State* L) { |
| 368 | get_obj<SkPath>(L, 1)->reset(); |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static int lpath_moveTo(lua_State* L) { |
| 373 | get_obj<SkPath>(L, 1)->moveTo(lua2scalar(L, 2), lua2scalar(L, 3)); |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | static int lpath_lineTo(lua_State* L) { |
| 378 | get_obj<SkPath>(L, 1)->lineTo(lua2scalar(L, 2), lua2scalar(L, 3)); |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static int lpath_quadTo(lua_State* L) { |
| 383 | get_obj<SkPath>(L, 1)->quadTo(lua2scalar(L, 2), lua2scalar(L, 3), |
| 384 | lua2scalar(L, 4), lua2scalar(L, 5)); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int lpath_cubicTo(lua_State* L) { |
| 389 | get_obj<SkPath>(L, 1)->cubicTo(lua2scalar(L, 2), lua2scalar(L, 3), |
| 390 | lua2scalar(L, 4), lua2scalar(L, 5), |
| 391 | lua2scalar(L, 6), lua2scalar(L, 7)); |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static int lpath_close(lua_State* L) { |
| 396 | get_obj<SkPath>(L, 1)->close(); |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static int lpath_gc(lua_State* L) { |
| 401 | get_obj<SkPath>(L, 1)->~SkPath(); |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static const struct luaL_Reg gSkPath_Methods[] = { |
| 406 | { "getBounds", lpath_getBounds }, |
| 407 | { "isEmpty", lpath_isEmpty }, |
| 408 | { "isRect", lpath_isRect }, |
| 409 | { "isNestedRects", lpath_isNestedRects }, |
| 410 | { "reset", lpath_reset }, |
| 411 | { "moveTo", lpath_moveTo }, |
| 412 | { "lineTo", lpath_lineTo }, |
| 413 | { "quadTo", lpath_quadTo }, |
| 414 | { "cubicTo", lpath_cubicTo }, |
| 415 | { "close", lpath_close }, |
| 416 | { "__gc", lpath_gc }, |
| 417 | { NULL, NULL } |
| 418 | }; |
| 419 | |
| 420 | /////////////////////////////////////////////////////////////////////////////// |
| 421 | |
| 422 | static const char* rrect_type(const SkRRect& rr) { |
| 423 | switch (rr.getType()) { |
| 424 | case SkRRect::kUnknown_Type: return "unknown"; |
| 425 | case SkRRect::kEmpty_Type: return "empty"; |
| 426 | case SkRRect::kRect_Type: return "rect"; |
| 427 | case SkRRect::kOval_Type: return "oval"; |
| 428 | case SkRRect::kSimple_Type: return "simple"; |
| 429 | case SkRRect::kComplex_Type: return "complex"; |
| 430 | } |
| 431 | SkASSERT(!"never get here"); |
| 432 | return ""; |
| 433 | } |
| 434 | |
| 435 | static int lrrect_rect(lua_State* L) { |
| 436 | SkLua(L).pushRect(get_obj<SkRRect>(L, 1)->rect()); |
| 437 | return 1; |
| 438 | } |
| 439 | |
| 440 | static int lrrect_type(lua_State* L) { |
| 441 | lua_pushstring(L, rrect_type(*get_obj<SkRRect>(L, 1))); |
| 442 | return 1; |
| 443 | } |
| 444 | |
| 445 | static int lrrect_radii(lua_State* L) { |
| 446 | int corner = lua_tointeger(L, 2); |
| 447 | SkVector v; |
| 448 | if (corner < 0 || corner > 3) { |
| 449 | SkDebugf("bad corner index %d", corner); |
| 450 | v.set(0, 0); |
| 451 | } else { |
| 452 | v = get_obj<SkRRect>(L, 1)->radii((SkRRect::Corner)corner); |
| 453 | } |
| 454 | lua_pushnumber(L, v.fX); |
| 455 | lua_pushnumber(L, v.fY); |
| 456 | return 2; |
| 457 | } |
| 458 | |
| 459 | static int lrrect_gc(lua_State* L) { |
| 460 | get_obj<SkRRect>(L, 1)->~SkRRect(); |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | static const struct luaL_Reg gSkRRect_Methods[] = { |
| 465 | { "rect", lrrect_rect }, |
| 466 | { "type", lrrect_type }, |
| 467 | { "radii", lrrect_radii }, |
| 468 | { "__gc", lrrect_gc }, |
| 469 | { NULL, NULL } |
| 470 | }; |
| 471 | |
| 472 | /////////////////////////////////////////////////////////////////////////////// |
| 473 | |
| 474 | class AutoCallLua { |
| 475 | public: |
| 476 | AutoCallLua(lua_State* L, const char func[], const char verb[]) : fL(L) { |
| 477 | lua_getglobal(L, func); |
| 478 | if (!lua_isfunction(L, -1)) { |
| 479 | int t = lua_type(L, -1); |
| 480 | SkDebugf("--- expected function %d\n", t); |
| 481 | } |
| 482 | |
| 483 | lua_newtable(L); |
| 484 | setfield_string(L, "verb", verb); |
| 485 | } |
| 486 | |
| 487 | ~AutoCallLua() { |
| 488 | if (lua_pcall(fL, 1, 0, 0) != LUA_OK) { |
| 489 | SkDebugf("lua err: %s\n", lua_tostring(fL, -1)); |
| 490 | } |
| 491 | lua_settop(fL, -1); |
| 492 | } |
| 493 | |
| 494 | private: |
| 495 | lua_State* fL; |
| 496 | }; |
| 497 | |
| 498 | #define AUTO_LUA(verb) AutoCallLua acl(fL, fFunc.c_str(), verb) |
| 499 | |
| 500 | /////////////////////////////////////////////////////////////////////////////// |
| 501 | |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 502 | static int lsk_newPaint(lua_State* L) { |
| 503 | push_new<SkPaint>(L); |
| 504 | return 1; |
| 505 | } |
| 506 | |
| 507 | static int lsk_newPath(lua_State* L) { |
| 508 | push_new<SkPath>(L); |
| 509 | return 1; |
| 510 | } |
| 511 | |
| 512 | static int lsk_newRRect(lua_State* L) { |
| 513 | SkRRect* rr = push_new<SkRRect>(L); |
| 514 | rr->setEmpty(); |
| 515 | return 1; |
| 516 | } |
| 517 | |
| 518 | static const struct luaL_Reg gSk_Functions[] = { |
| 519 | { "newPaint", lsk_newPaint }, |
| 520 | { "newPath", lsk_newPath }, |
| 521 | { "newRRect", lsk_newRRect }, |
| 522 | { NULL, NULL } |
| 523 | }; |
| 524 | |
| 525 | static void register_Sk(lua_State* L) { |
| 526 | lua_newtable(L); |
| 527 | lua_pushvalue(L, -1); |
| 528 | lua_setglobal(L, "Sk"); |
| 529 | // the Sk table is still on top |
| 530 | |
| 531 | setfield_function(L, "newPaint", lsk_newPaint); |
| 532 | setfield_function(L, "newPath", lsk_newPath); |
| 533 | setfield_function(L, "newRRect", lsk_newRRect); |
| 534 | lua_pop(L, 1); // pop off the Sk table |
| 535 | } |
| 536 | |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 537 | #define REG_CLASS(L, C) \ |
| 538 | do { \ |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 539 | luaL_newmetatable(L, get_mtname<C>()); \ |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 540 | lua_pushvalue(L, -1); \ |
| 541 | lua_setfield(L, -2, "__index"); \ |
| 542 | luaL_setfuncs(L, g##C##_Methods, 0); \ |
| 543 | lua_pop(L, 1); /* pop off the meta-table */ \ |
| 544 | } while (0) |
| 545 | |
| 546 | void SkLua::Load(lua_State* L) { |
reed@google.com | 3597b73 | 2013-05-22 20:12:50 +0000 | [diff] [blame^] | 547 | register_Sk(L); |
reed@google.com | 74ce6f0 | 2013-05-22 15:13:18 +0000 | [diff] [blame] | 548 | REG_CLASS(L, SkCanvas); |
| 549 | REG_CLASS(L, SkPath); |
| 550 | REG_CLASS(L, SkPaint); |
| 551 | REG_CLASS(L, SkRRect); |
| 552 | } |
| 553 | |