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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 "SkImageDecoder.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 DEFINE_string(modulo, "", "[--modulo <remainder> <divisor>]: only run tests for which "
     35               "testIndex %% divisor == remainder.");
     36 DEFINE_string2(skpPath, r, "", "Read this .skp file or .skp files from this dir");
     37 DEFINE_string2(luaFile, l, "", "File containing lua script to run");
     38 DEFINE_string2(headCode, s, "", "Optional lua code to call at beginning");
     39 DEFINE_string2(tailFunc, s, "", "Optional lua function to call at end");
     40 DEFINE_bool2(quiet, q, false, "Silence all non-error related output");
     41 
     42 static SkPicture* load_picture(const char path[]) {
     43     SkAutoTDelete<SkStream> stream(SkStream::NewFromFile(path));
     44     SkPicture* pic = nullptr;
     45     if (stream.get()) {
     46         pic = SkPicture::CreateFromStream(stream.get());
     47     }
     48     return pic;
     49 }
     50 
     51 static void call_canvas(lua_State* L, SkLuaCanvas* canvas,
     52                         const char pictureFile[], const char funcName[]) {
     53     lua_getglobal(L, funcName);
     54     if (!lua_isfunction(L, -1)) {
     55         int t = lua_type(L, -1);
     56         SkDebugf("--- expected %s function %d, ignoring.\n", funcName, t);
     57         lua_settop(L, -2);
     58     } else {
     59         canvas->pushThis();
     60         lua_pushstring(L, pictureFile);
     61         if (lua_pcall(L, 2, 0, 0) != LUA_OK) {
     62             SkDebugf("lua err: %s\n", lua_tostring(L, -1));
     63         }
     64     }
     65 }
     66 
     67 int tool_main(int argc, char** argv);
     68 int tool_main(int argc, char** argv) {
     69     SkCommandLineFlags::SetUsage("apply lua script to .skp files.");
     70     SkCommandLineFlags::Parse(argc, argv);
     71 
     72     if (FLAGS_skpPath.isEmpty()) {
     73         SkDebugf(".skp files or directories are required.\n");
     74         exit(-1);
     75     }
     76     if (FLAGS_luaFile.isEmpty()) {
     77         SkDebugf("missing luaFile(s)\n");
     78         exit(-1);
     79     }
     80 
     81     const char* summary = gSummarizeFunc;
     82     if (!FLAGS_tailFunc.isEmpty()) {
     83         summary = FLAGS_tailFunc[0];
     84     }
     85 
     86     SkAutoGraphics ag;
     87     SkLua L(summary);
     88 
     89     for (int i = 0; i < FLAGS_luaFile.count(); ++i) {
     90         SkAutoDataUnref data(SkData::NewFromFileName(FLAGS_luaFile[i]));
     91         if (nullptr == data.get()) {
     92             data.reset(SkData::NewEmpty());
     93         }
     94         if (!FLAGS_quiet) {
     95             SkDebugf("loading %s...\n", FLAGS_luaFile[i]);
     96         }
     97         if (!L.runCode(data->data(), data->size())) {
     98             SkDebugf("failed to load luaFile %s\n", FLAGS_luaFile[i]);
     99             exit(-1);
    100         }
    101     }
    102 
    103     if (!FLAGS_headCode.isEmpty()) {
    104         L.runCode(FLAGS_headCode[0]);
    105     }
    106 
    107     int moduloRemainder = -1;
    108     int moduloDivisor = -1;
    109     SkString moduloStr;
    110 
    111     if (FLAGS_modulo.count() == 2) {
    112         moduloRemainder = atoi(FLAGS_modulo[0]);
    113         moduloDivisor = atoi(FLAGS_modulo[1]);
    114         if (moduloRemainder < 0 || moduloDivisor <= 0 || moduloRemainder >= moduloDivisor) {
    115             SkDebugf("invalid modulo values.\n");
    116             return -1;
    117         }
    118     }
    119 
    120     for (int i = 0; i < FLAGS_skpPath.count(); i ++) {
    121         SkTArray<SkString> paths;
    122         if (sk_isdir(FLAGS_skpPath[i])) {
    123             // Add all .skp in this directory.
    124             const SkString directory(FLAGS_skpPath[i]);
    125             SkString filename;
    126             SkOSFile::Iter iter(FLAGS_skpPath[i], "skp");
    127             while(iter.next(&filename)) {
    128                 paths.push_back() = SkOSPath::Join(directory.c_str(), filename.c_str());
    129             }
    130         } else {
    131             // Add this as an .skp itself.
    132             paths.push_back() = FLAGS_skpPath[i];
    133         }
    134 
    135         for (int i = 0; i < paths.count(); i++) {
    136             if (moduloRemainder >= 0) {
    137                 if ((i % moduloDivisor) != moduloRemainder) {
    138                     continue;
    139                 }
    140                 moduloStr.printf("[%d.%d] ", i, moduloDivisor);
    141             }
    142             const char* path = paths[i].c_str();
    143             if (!FLAGS_quiet) {
    144                 SkDebugf("scraping %s %s\n", path, moduloStr.c_str());
    145             }
    146 
    147             SkAutoTUnref<SkPicture> pic(load_picture(path));
    148             if (pic.get()) {
    149                 SkAutoTUnref<SkLuaCanvas> canvas(
    150                                     new SkLuaCanvas(SkScalarCeilToInt(pic->cullRect().width()),
    151                                                     SkScalarCeilToInt(pic->cullRect().height()),
    152                                                     L.get(), gAccumulateFunc));
    153 
    154                 call_canvas(L.get(), canvas.get(), path, gStartCanvasFunc);
    155                 canvas->drawPicture(pic);
    156                 call_canvas(L.get(), canvas.get(), path, gEndCanvasFunc);
    157 
    158             } else {
    159                 SkDebugf("failed to load\n");
    160             }
    161         }
    162     }
    163     return 0;
    164 }
    165 
    166 #if !defined SK_BUILD_FOR_IOS
    167 int main(int argc, char * const argv[]) {
    168     return tool_main(argc, (char**) argv);
    169 }
    170 #endif
    171