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