Home | History | Annotate | Download | only in lua 
      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 "LazyDecodeBitmap.h"
      9 #include "SkLua.h"
     10 #include "SkLuaCanvas.h"
     11 #include "SkPicture.h"
     12 #include "SkCommandLineFlags.h"
     13 #include "SkGraphics.h"
     14 #include "SkStream.h"
     15 #include "SkData.h"
     16 #include "picture_utils.h"
     17 #include "SkOSFile.h"
     18 #include "SkImageDecoder.h"
     19 
     20 extern "C" {
     21     #include "lua.h"
     22     #include "lualib.h"
     23     #include "lauxlib.h"
     24 }
     25 
     26 static const char gStartCanvasFunc[] = "sk_scrape_startcanvas";
     27 static const char gEndCanvasFunc[] = "sk_scrape_endcanvas";
     28 static const char gAccumulateFunc[] = "sk_scrape_accumulate";
     29 static const char gSummarizeFunc[] = "sk_scrape_summarize";
     30 
     31 // Example usage for the modulo flag:
     32 // for i in {0..5}; do lua_pictures --skpPath SKP_PATH -l YOUR_SCRIPT --modulo $i 6 &; done
     33 DEFINE_string(modulo, "", "[--modulo <remainder> <divisor>]: only run tests for which "
     34               "testIndex %% divisor == remainder.");
     35 DEFINE_string2(skpPath, r, "", "Read this .skp file or .skp files from this dir");
     36 DEFINE_string2(luaFile, l, "", "File containing lua script to run");
     37 DEFINE_string2(headCode, s, "", "Optional lua code to call at beginning");
     38 DEFINE_string2(tailFunc, s, "", "Optional lua function to call at end");
     39 DEFINE_bool2(quiet, q, false, "Silence all non-error related output");
     40 
     41 static SkPicture* load_picture(const char path[]) {
     42     SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
     43     SkPicture* pic = NULL;
     44     if (stream.get()) {
     45         pic = SkPicture::CreateFromStream(stream.get(), &sk_tools::LazyDecodeBitmap);
     46     }
     47     return pic;
     48 }
     49 
     50 static void call_canvas(lua_State* L, SkLuaCanvas* canvas,
     51                         const char pictureFile[], const char funcName[]) {
     52     lua_getglobal(L, funcName);
     53     if (!lua_isfunction(L, -1)) {
     54         int t = lua_type(L, -1);
     55         SkDebugf("--- expected %s function %d, ignoring.\n", funcName, t);
     56         lua_settop(L, -2);
     57     } else {
     58         canvas->pushThis();
     59         lua_pushstring(L, pictureFile);
     60         if (lua_pcall(L, 2, 0, 0) != LUA_OK) {
     61             SkDebugf("lua err: %s\n", lua_tostring(L, -1));
     62         }
     63     }
     64 }
     65 
     66 int tool_main(int argc, char** argv);
     67 int tool_main(int argc, char** argv) {
     68     SkCommandLineFlags::SetUsage("apply lua script to .skp files.");
     69     SkCommandLineFlags::Parse(argc, argv);
     70 
     71     if (FLAGS_skpPath.isEmpty()) {
     72         SkDebugf(".skp files or directories are required.\n");
     73         exit(-1);
     74     }
     75     if (FLAGS_luaFile.isEmpty()) {
     76         SkDebugf("missing luaFile(s)\n");
     77         exit(-1);
     78     }
     79 
     80     const char* summary = gSummarizeFunc;
     81     if (!FLAGS_tailFunc.isEmpty()) {
     82         summary = FLAGS_tailFunc[0];
     83     }
     84 
     85     SkAutoGraphics ag;
     86     SkLua L(summary);
     87 
     88     for (int i = 0; i < FLAGS_luaFile.count(); ++i) {
     89         SkAutoDataUnref data(SkData::NewFromFileName(FLAGS_luaFile[i]));
     90         if (NULL == data.get()) {
     91             data.reset(SkData::NewEmpty());
     92         }
     93         if (!FLAGS_quiet) {
     94             SkDebugf("loading %s...\n", FLAGS_luaFile[i]);
     95         }
     96         if (!L.runCode(data->data(), data->size())) {
     97             SkDebugf("failed to load luaFile %s\n", FLAGS_luaFile[i]);
     98             exit(-1);
     99         }
    100     }
    101 
    102     if (!FLAGS_headCode.isEmpty()) {
    103         L.runCode(FLAGS_headCode[0]);
    104     }
    105 
    106     int moduloRemainder = -1;
    107     int moduloDivisor = -1;
    108     SkString moduloStr;
    109 
    110     if (FLAGS_modulo.count() == 2) {
    111         moduloRemainder = atoi(FLAGS_modulo[0]);
    112         moduloDivisor = atoi(FLAGS_modulo[1]);
    113         if (moduloRemainder < 0 || moduloDivisor <= 0 || moduloRemainder >= moduloDivisor) {
    114             SkDebugf("invalid modulo values.\n");
    115             return -1;
    116         }
    117     }
    118 
    119     for (int i = 0; i < FLAGS_skpPath.count(); i ++) {
    120         SkTArray<SkString> paths;
    121         if (sk_isdir(FLAGS_skpPath[i])) {
    122             // Add all .skp in this directory.
    123             const SkString directory(FLAGS_skpPath[i]);
    124             SkString filename;
    125             SkOSFile::Iter iter(FLAGS_skpPath[i], "skp");
    126             while(iter.next(&filename)) {
    127                 paths.push_back() = SkOSPath::Join(directory.c_str(), filename.c_str());
    128             }
    129         } else {
    130             // Add this as an .skp itself.
    131             paths.push_back() = FLAGS_skpPath[i];
    132         }
    133 
    134         for (int i = 0; i < paths.count(); i++) {
    135             if (moduloRemainder >= 0) {
    136                 if ((i % moduloDivisor) != moduloRemainder) {
    137                     continue;
    138                 }
    139                 moduloStr.printf("[%d.%d] ", i, moduloDivisor);
    140             }
    141             const char* path = paths[i].c_str();
    142             if (!FLAGS_quiet) {
    143                 SkDebugf("scraping %s %s\n", path, moduloStr.c_str());
    144             }
    145 
    146             SkAutoTUnref<SkPicture> pic(load_picture(path));
    147             if (pic.get()) {
    148                 SkAutoTUnref<SkLuaCanvas> canvas(
    149                                     new SkLuaCanvas(SkScalarCeilToInt(pic->cullRect().width()),
    150                                                     SkScalarCeilToInt(pic->cullRect().height()),
    151                                                     L.get(), gAccumulateFunc));
    152 
    153                 call_canvas(L.get(), canvas.get(), path, gStartCanvasFunc);
    154                 canvas->drawPicture(pic);
    155                 call_canvas(L.get(), canvas.get(), path, gEndCanvasFunc);
    156 
    157             } else {
    158                 SkDebugf("failed to load\n");
    159             }
    160         }
    161     }
    162     return 0;
    163 }
    164 
    165 #if !defined SK_BUILD_FOR_IOS
    166 int main(int argc, char * const argv[]) {
    167     return tool_main(argc, (char**) argv);
    168 }
    169 #endif
    170