Mercurial > hg > Members > kono > Cerium
annotate Renderer/Engine/task/DrawSpan.cc @ 738:510424e175ae
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| author | yutaka@localhost.localdomain |
|---|---|
| date | Thu, 31 Dec 2009 04:07:18 +0900 |
| parents | 60aa3f241b10 |
| children | 984e6aa17174 |
| rev | line source |
|---|---|
| 507 | 1 #include <stdlib.h> |
| 2 #include <string.h> | |
| 3 #include "DrawSpan.h" | |
| 4 #include "polygon_pack.h" | |
| 5 #include "texture.h" | |
| 6 #include "viewer_types.h" | |
| 7 #include "Func.h" | |
| 8 #include "sys.h" | |
| 9 #include "global_alloc.h" | |
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10 #include "SchedTask.h" |
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11 #include "Tapestry.h" |
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12 #include "SpanPack.h" |
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13 |
| 623 | 14 #if (__LITTLE_ENDIAN__) |
| 15 #define LITTLEENDIAN 1 | |
| 16 #else | |
| 17 #define LITTLEENDIAN 0 | |
| 18 #endif | |
| 507 | 19 |
| 20 SchedDefineTask(DrawSpan); | |
| 21 | |
| 22 #define TEX_LOAD1 0 | |
| 23 #define TEX_LOAD2 1 | |
| 24 #define SPAN_PACK_LOAD 2 | |
| 25 #define FB_STORE 3 | |
| 26 | |
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27 typedef struct { |
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28 int **linebuf; |
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29 float *zRow; |
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30 TileListPtr tileList; |
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31 int doneWrite; |
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32 } G, *Gptr; |
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33 |
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34 static int** linebuf_init(SchedTask *smanager, int width, int height, int rgb); |
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35 static float* zRow_init(SchedTask *smanager, int width, int height); |
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36 // static TilePtr set_rgb(memaddr addr, int wait_tag); |
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37 // static void set_rgbs(memaddr addr, uint32 *max_addr, int wait_tag); |
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38 static uint32 get_rgb(int tx, int ty, TilePtr tile); |
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39 // static TilePtr isAvailableTile(memaddr addr); |
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40 static memaddr getTile(int tx, int ty, int tw, memaddr tex_addr_top); |
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41 static int getTexBlock(int tx, int ty, int twidth); |
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42 |
| 738 | 43 static void updateBuffer(Gptr g, float zpos, int rangex, int loaclx, int localy, |
| 44 int tex_x, int tex_y, float normal_x, float nomral_x, float normal_z, | |
| 45 TilePtr tile, int world_x, int world_y, float world_z,SchedTask *smanager); | |
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46 |
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47 // static void reboot(SpanPackPtr spack, int cur_span_x); |
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48 |
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49 static int drawDot1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag); |
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50 //static void drawDot2(SchedTask *smanager, SpanPtr span, int startx, int endx, int js, int wait_tag); |
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51 static int drawLine1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag); |
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52 // static void drawLine2(SchedTask *smanager, SpanPtr span, int startx, int endx, int js, int wait_tag); |
| 738 | 53 |
| 54 static int infinity_light_calc(int color,float normal_x, float normal_y, float normal_z, | |
| 55 SchedTask *smanager,int x, int y, float z, int world_x, int world_y, float world_z); | |
| 56 | |
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57 |
| 621 | 58 static float |
| 59 innerProduct1(float *v0, float *v1) | |
| 60 { | |
| 61 return (v0[0]*v1[0] + v0[1]*v1[1] + v0[2]*v1[2]); | |
| 62 } | |
| 63 | |
| 507 | 64 |
| 65 /** | |
| 66 * テクスチャは、TEXTURE_SPLIT_PIXEL^2 のブロックに分割する | |
| 67 * | |
| 68 * +---+---+---+---+---+---+ | |
| 69 * | 0 | 1 | 2 | 3 | 4 | 5 | | |
| 70 * +---+---+---+---+---+---+ | |
| 71 * | | | | | |11 | | |
| 72 * +---+---+---+---+---+---+ | |
| 73 * | | | | | |17 | | |
| 74 * +---+---+---+---+---+---+ | |
| 75 * | | | | | |23 | | |
| 76 * +---+---+---+---+---+---+ | |
| 77 * | | | | | |29 | | |
| 78 * +---+---+---+---+---+---+ | |
| 79 * | | | | | |35 | | |
| 80 * +---+---+---+---+---+---+ | |
| 81 * | |
| 82 * 一辺を TEXTURE_SPLIT とする | |
| 83 * 各ブロックの数字がブロックIDとなる。 | |
| 84 */ | |
| 85 | |
| 86 /** | |
| 87 * テクスチャの座標から、 | |
| 88 * テクスチャのどのブロックかを求める | |
| 89 * | |
| 90 * @param[in] tx X coordinates of texture | |
| 91 * @param[in] tx Y coordinates of texture | |
| 92 * @param[in] twidth Width of texture | |
| 93 * @return block ID | |
| 94 */ | |
| 95 static int | |
| 96 getTexBlock(int tx, int ty, int twidth) | |
| 97 { | |
| 98 int blockX, blockY; | |
| 99 | |
| 100 blockX = tx / TEXTURE_SPLIT_PIXEL; | |
| 101 blockY = ty / TEXTURE_SPLIT_PIXEL; | |
| 102 | |
| 103 return blockX + (twidth/TEXTURE_SPLIT_PIXEL)*blockY; | |
| 104 } | |
| 105 | |
| 106 /** | |
| 107 * block ID と、テクスチャの TOP address から | |
| 108 * (tx,ty) で使われるテクスチャの Tile addres を求める | |
| 109 * | |
| 110 * @param[in] tx X coordinates of texture | |
| 111 * @param[in] tx Y coordinates of texture | |
| 112 * @param[in] tw Width of texture | |
| 113 * @param[in] tex_addr_top (tx,ty) で使うテクスチャの先頭address | |
| 114 * @return block ID | |
| 115 */ | |
| 116 static memaddr | |
| 117 getTile(int tx, int ty, int tw, memaddr tex_addr_top) | |
| 118 { | |
| 119 int block = getTexBlock(tx, ty, tw); | |
| 120 return tex_addr_top + block * TEXTURE_BLOCK_SIZE * sizeof(uint32); | |
| 121 } | |
| 122 | |
| 123 /** | |
| 124 * FrameBuffer に書き込む rgb の領域初期化 | |
| 125 * | |
| 126 * @param width Width of Buffer | |
| 127 * @param height Height of Buffer | |
| 128 * @param rgb Initial value of RGB at Buffer | |
| 129 * @return Buffer | |
| 130 */ | |
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131 static int ** |
| 507 | 132 linebuf_init(SchedTask *smanager, int width, int height, int rgb) |
| 133 { | |
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134 int **linebuf = (int**)smanager->allocate(height*sizeof(int*)); |
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135 for(int h = 0;h<height;h++) { |
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136 int *buf = linebuf[h] = (int*)smanager->get_output(h); |
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137 for (int i = 0; i < width; i++) { |
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138 buf[i] = rgb; |
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139 } |
| 507 | 140 } |
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141 return linebuf; |
| 507 | 142 } |
| 143 | |
| 144 /** | |
| 145 * Z-Buffer の初期化 | |
| 146 * | |
| 147 * @param width Width of Z-Buffer | |
| 148 * @param height Height of Z-Buffer | |
| 149 * @return Z-Buffer | |
| 150 */ | |
| 151 static float* | |
| 152 zRow_init(SchedTask *smanager, int width, int height) | |
| 153 { | |
| 154 float *buf = (float*)smanager->allocate(sizeof(float)*width*height); | |
| 155 float def = 65535.0f; | |
| 156 | |
| 157 for (int i = 0; i < width*height; i++) { | |
| 158 buf[i] = def; | |
| 159 } | |
| 160 | |
| 161 return buf; | |
| 162 } | |
| 163 | |
| 164 | |
| 165 static uint32 | |
| 166 get_rgb(int tx, int ty, TilePtr tile) | |
| 167 { | |
| 168 uint32 *data = (uint32 *)tile->data; | |
| 169 return data[(TEXTURE_SPLIT_PIXEL)*ty+tx]; | |
| 170 } | |
| 171 | |
| 172 | |
| 173 | |
| 174 /** | |
| 175 * zRow と Linebuf を更新する | |
| 176 * | |
| 177 * @param zpos 更新する pixel のZ座標 | |
| 178 * @param rangex このタスクが処理する描画領域の x の長さ | |
| 179 * @param x pixel の、描画領域内での x 座標 | |
| 180 * @param y 〃 の、y 座標 | |
| 181 * @param tex_x pixel が使用するテクスチャの、Tile (8x8) 内での x 座標 | |
| 182 * @param tex_y 〃 の y 座標 | |
| 183 * @param tex_addr テクスチャのアドレス(MainMemory) | |
| 184 */ | |
| 185 static void | |
| 738 | 186 updateBuffer(Gptr g, float zpos, int rangex, int localx, int localy, int tex_x, int tex_y, |
| 187 float normal_x, float normal_y, float normal_z, TilePtr tile, | |
| 188 int world_x, int world_y, float world_z, SchedTask *smanager) | |
| 507 | 189 { |
| 190 | |
| 191 int color = get_rgb(tex_x, tex_y, tile); | |
| 192 /*下位4bitを抽出*/ | |
| 623 | 193 #if LITTLEENDIAN |
| 599 | 194 int alpha = color & 0x000000ff; |
| 619 | 195 #else |
| 196 int alpha = color & 0xff000000; | |
| 197 #endif | |
| 507 | 198 /*完全に透けているか判断*/ |
| 199 int flag = (alpha != 0); | |
| 200 | |
| 738 | 201 color = infinity_light_calc(color,normal_x,normal_y,normal_z, |
| 202 smanager,localx,localy,zpos, | |
| 203 world_x,world_y,world_z); | |
| 507 | 204 |
| 738 | 205 g->zRow[localx + (rangex*localy)] = zpos*flag + g->zRow[localx + (rangex*localy)]*(1-flag); |
| 206 int *point = &g->linebuf[localy][localx] ; | |
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207 *point = color*flag + *point *(1-flag); |
| 507 | 208 |
| 738 | 209 |
| 210 | |
| 507 | 211 } |
| 212 | |
| 213 /** | |
| 214 * 長さが 1 の Span の描画 (要するに 1 pixel) | |
| 215 * | |
| 216 * @param span Span | |
| 217 * @param startx 描画開始範囲 | |
| 218 * @param endx 描画終了範囲 | |
| 219 */ | |
| 220 static int | |
| 221 drawDot1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag) | |
| 222 { | |
| 223 int rangex = endx - startx + 1; | |
| 224 | |
| 225 float normal_x = span->normal_x; | |
| 226 float normal_y = span->normal_y; | |
| 227 float normal_z = span->normal_z; | |
| 228 | |
| 229 | |
| 230 /* span->x に対応する Texture の座標 (tex_xpos, tex_ypos) */ | |
| 231 int tex_xpos, tex_ypos; | |
| 232 | |
| 233 // span の始点に対応する Texture の座標 (tex1, tey1) | |
| 234 float tex = span->tex_x1; | |
| 235 float tey = span->tex_y1; | |
| 236 | |
| 237 // span の始点に対応する z 座標 | |
| 238 float zpos = span->start_z; | |
| 239 | |
| 240 /* Tile 内での座標 */ | |
| 241 int localx = getLocalX(span->x-1); | |
| 242 int localy = getLocalY(span->y-1); | |
| 243 | |
| 244 /** | |
| 245 * (tex_xpos, tex_ypos) の、Tile 内(上の図参照)での座標と | |
| 246 * そのブロックのアドレス(MainMemory) | |
| 247 */ | |
| 248 int tex_localx; | |
| 249 int tex_localy; | |
| 250 memaddr tex_addr; | |
| 251 | |
| 252 if (span->x < startx || endx < span->x) { | |
| 253 return -1; | |
| 254 } | |
| 255 | |
| 256 tex_xpos = (int)((span->tex_width-1) * tex); | |
| 257 tex_ypos = (int)((span->tex_height-1) * tey); | |
| 258 | |
| 259 if (zpos < g->zRow[localx + (rangex*localy)]) { | |
| 260 tex_addr = getTile(tex_xpos, tex_ypos, | |
| 261 span->tex_width, (memaddr)span->tex_addr); | |
| 262 tex_localx = tex_xpos % TEXTURE_SPLIT_PIXEL; | |
| 263 tex_localy = tex_ypos % TEXTURE_SPLIT_PIXEL; | |
| 264 | |
| 265 TilePtr tile = smanager->get_segment(tex_addr,g->tileList); | |
| 266 smanager->wait_segment(tile); | |
| 267 | |
| 268 updateBuffer(g, zpos, rangex, localx, localy, | |
| 269 tex_localx, tex_localy, | |
| 738 | 270 normal_x,normal_y,normal_z,tile, |
| 271 span->x, span->y, zpos, smanager); | |
| 507 | 272 } |
| 273 | |
| 274 return -1; | |
| 275 } | |
| 276 | |
| 277 #if 0 | |
| 278 static void | |
| 279 drawDot2(SchedTask *smanager, SpanPtr span, int startx, int end, int js, int wait_tag) | |
| 280 { | |
| 281 //printf("%d\n", js); | |
| 282 } | |
| 283 #endif | |
| 284 | |
| 285 /** | |
| 286 * 長さが 1 より大きい Span の描画 | |
| 287 * | |
| 288 * 本来の目的として、この関数(drawLine1) では | |
| 289 * : 既に SPE 上に Tile のある pixel だけ描画 | |
| 290 * : それ以外は、ここで予め DMA load しておき、 | |
| 291 * : drawLine2 で一気に描画する | |
| 292 * ってものだったんだけど、どうも上手く行かなかったので | |
| 293 * 今は drawLine1 で load -> wait -> rendering を全部やってます | |
| 294 * (rendering といっても、rendering buffer に書き込むだけで | |
| 295 * まだ main memory (frame buffer) に dma store してるわけではない) | |
| 296 * | |
| 297 * @param span Span | |
| 298 * @param startx 描画開始範囲 | |
| 299 * @param endx 描画終了範囲 | |
| 300 * @return 「span のどの位置まで rendering が終わったか」の x 座標 | |
| 301 */ | |
| 302 static int | |
| 303 drawLine1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag) | |
| 304 { | |
| 305 int x = span->x; | |
| 306 int rangex = endx - startx + 1; | |
| 307 int x_len = span->length_x; | |
| 308 | |
| 309 float normal_x = span->normal_x; | |
| 310 float normal_y = span->normal_y; | |
| 311 float normal_z = span->normal_z; | |
| 312 | |
| 313 | |
| 314 int js = (x < startx) ? startx - x : 0; | |
| 315 int je = (x + x_len > endx) ? endx - x : x_len; | |
| 316 | |
| 317 /* span->x に対応する Texture の座標 (tex_xpos, tex_ypos) */ | |
| 318 int tex_xpos, tex_ypos; | |
| 319 | |
| 320 // span の始点に対応する座標 (tex1, tey1) | |
| 321 float tex1 = span->tex_x1; | |
| 322 float tey1 = span->tex_y1; | |
| 323 | |
| 324 // span の終点に対応する座標 (tex2, tey2) | |
| 325 float tex2 = span->tex_x2; | |
| 326 float tey2 = span->tex_y2; | |
| 327 | |
| 328 // span の始点、終点に対応する z 座標 | |
| 329 float zpos1 = span->start_z; | |
| 330 float zpos2 = span->end_z; | |
| 331 | |
| 738 | 332 //spanを右から左に見ていくうちに、zが下がるのか、上がっていくのか。 |
| 333 float z_inclination = (zpos1 - zpos2) / x_len; | |
| 334 float world_z = zpos2; | |
| 335 | |
| 507 | 336 // Tile 内での座標 |
| 337 int localx, localy = getLocalY(span->y-1); | |
| 338 | |
| 339 int ret = je+1; | |
| 340 | |
| 341 //for (int j = js; j <= je; j++) { | |
| 342 for (int j = je; j >= js; j--) { | |
| 343 float tex_x, tex_y, tex_z; | |
| 344 | |
| 738 | 345 world_z += z_inclination; |
| 346 | |
| 507 | 347 localx = getLocalX(x-1+j); |
| 348 | |
| 349 tex_z = zpos1*(x_len-1-j)/(x_len-1) + zpos2*j/(x_len-1); | |
| 350 | |
| 351 tex_x = tex1*(x_len-1-j)/(x_len-1) + tex2*j/(x_len-1); | |
| 352 tex_y = tey1*(x_len-1-j)/(x_len-1) + tey2*j/(x_len-1); | |
| 353 if (tex_x > 1) tex_x = 1; | |
| 354 if (tex_x < 0) tex_x = 0; | |
| 355 if (tex_y > 1) tex_y = 1; | |
| 356 if (tex_y < 0) tex_y = 0; | |
| 357 tex_xpos = (int)((span->tex_width-1) * tex_x); | |
| 358 tex_ypos = (int)((span->tex_height-1) * tex_y); | |
| 359 | |
| 360 if (tex_z < g->zRow[localx + (rangex*localy)]) { | |
| 361 // (tex_xpos, tex_ypos) の、Tile 内(上の図参照)での座標と | |
| 362 // そのブロックのアドレス(MainMemory) | |
| 363 memaddr tex_addr; | |
| 364 int tex_localx; | |
| 365 int tex_localy; | |
| 366 | |
| 367 tex_addr = getTile(tex_xpos, tex_ypos, | |
| 368 span->tex_width, (memaddr)span->tex_addr); | |
| 369 tex_localx = tex_xpos % TEXTURE_SPLIT_PIXEL; | |
| 370 tex_localy = tex_ypos % TEXTURE_SPLIT_PIXEL; | |
| 371 TilePtr tile = smanager->get_segment(tex_addr,g->tileList); | |
| 372 smanager->wait_segment(tile); | |
| 373 | |
| 374 updateBuffer(g, tex_z, rangex, localx, localy, | |
| 375 tex_localx, tex_localy, | |
| 738 | 376 normal_x, normal_y, normal_z, tile, |
| 377 span->x+j, span->y, world_z, smanager); | |
| 507 | 378 } |
| 379 } | |
| 380 | |
| 381 return ret; | |
| 382 } | |
| 383 | |
| 384 static int | |
| 738 | 385 infinity_light_calc(int color,float normal_x, float normal_y, |
| 386 float normal_z, SchedTask *smanager, int x, int y, float z, | |
| 387 int world_x, int world_y, float world_z) | |
| 388 | |
| 507 | 389 { |
| 390 unsigned char rgb[4]; | |
| 391 int light_rgb; | |
| 392 int flag; | |
| 393 float normal_vector[4] = {normal_x,normal_y,normal_z,0}; | |
| 394 // 光のベクトル,きめうちしちゃった。どうにかする | |
| 395 float light_vector[4] = {0,0,-1,0}; | |
| 396 float inner_product; | |
| 397 | |
| 398 // 引数で受け取った color の rgb 情報の抜き出し | |
| 623 | 399 #if LITTLEENDIAN |
| 507 | 400 rgb[0] = (color & 0xff000000) >> 24; |
| 401 rgb[1] = (color & 0x00ff0000) >> 16; | |
| 402 rgb[2] = (color & 0x0000ff00) >> 8; | |
| 403 rgb[3] = (color & 0x000000ff); | |
| 619 | 404 #else |
| 405 rgb[3] = (color & 0xff000000) >> 24; | |
| 406 rgb[2] = (color & 0x00ff0000) >> 16; | |
| 407 rgb[1] = (color & 0x0000ff00) >> 8; | |
| 408 rgb[0] = (color & 0x000000ff); | |
| 409 #endif | |
| 507 | 410 |
| 411 // 法線ベクトルと光源ベクトルとの内積をとる | |
| 621 | 412 inner_product = innerProduct1(normal_vector,light_vector); |
| 507 | 413 // 内積がマイナスの場合は色がない。 |
| 414 flag = (inner_product > 0); | |
| 415 | |
| 416 // 内積を rgb にかけていく | |
| 417 rgb[0] = (unsigned char)(rgb[0]*inner_product*flag); | |
| 418 rgb[1] = (unsigned char)(rgb[1]*inner_product*flag); | |
| 419 rgb[2] = (unsigned char)(rgb[2]*inner_product*flag); | |
| 420 | |
| 421 //計算した rgb を light_rgb にまとめる。 | |
| 623 | 422 #if LITTLEENDIAN |
| 507 | 423 light_rgb = (rgb[0] << 24) + (rgb[1] << 16) + (rgb[2] << 8) + (rgb[3]); |
| 619 | 424 #else |
| 425 light_rgb = (rgb[3] << 24) + (rgb[2] << 16) + (rgb[1] << 8) + (rgb[0]); | |
| 426 #endif | |
| 507 | 427 |
| 428 return light_rgb; | |
| 429 } | |
| 430 | |
| 431 | |
| 432 static int | |
| 433 run(SchedTask *smanager, void *rbuf, void *wbuf) | |
| 434 { | |
| 623 | 435 G g0; |
| 436 Gptr g = &g0; | |
| 507 | 437 |
| 438 SpanPackPtr spack = (SpanPackPtr)smanager->get_input(0); | |
| 439 SpanPackPtr next_spack = (SpanPackPtr)smanager->allocate(sizeof(SpanPack)); | |
| 440 SpanPackPtr free_spack = next_spack; // next_spack の free() 用 | |
| 441 Span *span; | |
| 442 | |
| 443 Span nop_span; | |
| 444 nop_span.length_x = 1; | |
| 445 | |
| 738 | 446 // uint32 display = (long)smanager->get_param(0); |
| 447 // int screen_width = (long)smanager->get_param(1); | |
|
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448 int rangex_start = (long)smanager->get_param(2); |
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449 int rangex_end = (long)smanager->get_param(3); |
| 507 | 450 |
| 451 // このタスクが担当する x の範囲 | |
| 452 int rangex = rangex_end - rangex_start + 1; | |
| 453 | |
| 454 // y の範囲 | |
|
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455 int rangey = (long)smanager->get_param(4); |
| 507 | 456 g->tileList = (TileListPtr)smanager->global_get(GLOBAL_TILE_LIST); |
| 457 | |
| 458 g->zRow = zRow_init(smanager, rangex, rangey); | |
| 459 g->linebuf = linebuf_init(smanager, rangex, rangey, 0); | |
| 460 | |
| 461 int tl_tag[2] = {TEX_LOAD1, TEX_LOAD2}; | |
| 462 int tl_tag_flg1 = 0; | |
| 463 int tl_tag_flg2 = 1; | |
| 464 | |
| 465 do { | |
| 466 /** | |
| 467 * SpanPack->next が存在する場合、 | |
| 468 * 現在の SpanPack を処理してる間に | |
| 469 * 次の SpanPack の DMA 転送を行う | |
| 470 */ | |
| 471 if (spack->next != NULL) { | |
|
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472 smanager->dma_load(next_spack, (memaddr)spack->next, |
| 507 | 473 sizeof(SpanPack), SPAN_PACK_LOAD); |
| 474 } else { | |
| 475 next_spack = NULL; | |
| 476 } | |
| 477 | |
| 478 SpanPtr resume_span = &nop_span; | |
| 479 | |
| 480 for (int t = 0; t < spack->info.size; t++) { | |
| 481 SpanPtr next_span; | |
| 482 | |
| 483 span = &spack->span[t]; | |
| 484 | |
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485 if (span->length_x != 1) { |
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486 drawLine1( |
| 507 | 487 smanager, g, |
| 488 span, rangex_start, rangex_end, tl_tag[tl_tag_flg1]); | |
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489 } else { |
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490 drawDot1( |
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491 smanager, g, |
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492 span, rangex_start, rangex_end, tl_tag[tl_tag_flg1]); |
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493 } |
| 507 | 494 next_span = span; |
| 495 | |
| 496 resume_span = next_span; | |
| 497 | |
| 498 tl_tag_flg1 ^= 1; | |
| 499 tl_tag_flg2 ^= 1; | |
| 500 } | |
| 501 | |
| 502 smanager->dma_wait(SPAN_PACK_LOAD); | |
| 503 | |
| 504 SpanPackPtr tmp_spack = spack; | |
| 505 spack = next_spack; | |
| 506 next_spack = tmp_spack; | |
| 507 } while (spack); | |
| 508 | |
| 509 | |
| 510 free(g->zRow); | |
|
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511 free(g->linebuf); |
| 507 | 512 |
| 513 //FINISH: | |
| 514 /** | |
| 515 * goto FINISH; の時は reboot なので | |
| 516 * linebuf, zRow は free() しない | |
| 517 */ | |
| 518 | |
| 519 free(free_spack); | |
| 520 | |
| 521 | |
| 522 return 0; | |
| 523 } | |
| 524 | |
| 525 /* end */ |