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      1 /*
      2  * Copyright 2014 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 "SkCommandLineFlags.h"
      9 #include "SkPicture.h"
     10 #include "SkPicturePlayback.h"
     11 #include "SkStream.h"
     12 
     13 DEFINE_string2(input, i, "", "skp on which to report");
     14 DEFINE_bool2(version, v, true, "version");
     15 DEFINE_bool2(width, w, true, "width");
     16 DEFINE_bool2(height, h, true, "height");
     17 DEFINE_bool2(flags, f, true, "flags");
     18 DEFINE_bool2(tags, t, true, "tags");
     19 DEFINE_bool2(quiet, q, false, "quiet");
     20 
     21 // This tool can print simple information about an SKP but its main use
     22 // is just to check if an SKP has been truncated during the recording
     23 // process.
     24 // return codes:
     25 static const int kSuccess = 0;
     26 static const int kTruncatedFile = 1;
     27 static const int kNotAnSKP = 2;
     28 static const int kInvalidTag = 3;
     29 static const int kMissingInput = 4;
     30 static const int kIOError = 5;
     31 
     32 int tool_main(int argc, char** argv);
     33 int tool_main(int argc, char** argv) {
     34     SkCommandLineFlags::SetUsage("Prints information about an skp file");
     35     SkCommandLineFlags::Parse(argc, argv);
     36 
     37     if (FLAGS_input.count() != 1) {
     38         if (!FLAGS_quiet) {
     39             SkDebugf("Missing input file\n");
     40         }
     41         return kMissingInput;
     42     }
     43 
     44     SkFILEStream stream(FLAGS_input[0]);
     45     if (!stream.isValid()) {
     46         if (!FLAGS_quiet) {
     47             SkDebugf("Couldn't open file\n");
     48         }
     49         return kIOError;
     50     }
     51 
     52     size_t totStreamSize = stream.getLength();
     53 
     54     SkPictInfo info;
     55     if (!SkPicture::InternalOnly_StreamIsSKP(&stream, &info)) {
     56         return kNotAnSKP;
     57     }
     58 
     59     if (FLAGS_version && !FLAGS_quiet) {
     60         SkDebugf("Version: %d\n", info.fVersion);
     61     }
     62     if (FLAGS_width && !FLAGS_quiet) {
     63         SkDebugf("Width: %d\n", info.fWidth);
     64     }
     65     if (FLAGS_height && !FLAGS_quiet) {
     66         SkDebugf("Height: %d\n", info.fHeight);
     67     }
     68     if (FLAGS_flags && !FLAGS_quiet) {
     69         SkDebugf("Flags: 0x%x\n", info.fFlags);
     70     }
     71 
     72     if (!stream.readBool()) {
     73         // If we read true there's a picture playback object flattened
     74         // in the file; if false, there isn't a playback, so we're done
     75         // reading the file.
     76         return kSuccess;
     77     }
     78 
     79     for (;;) {
     80         uint32_t tag = stream.readU32();
     81         if (SK_PICT_EOF_TAG == tag) {
     82             break;
     83         }
     84 
     85         uint32_t chunkSize = stream.readU32();
     86         size_t curPos = stream.getPosition();
     87 
     88         // "move" doesn't error out when seeking beyond the end of file
     89         // so we need a preemptive check here.
     90         if (curPos+chunkSize > totStreamSize) {
     91             if (!FLAGS_quiet) {
     92                 SkDebugf("truncated file\n");
     93             }
     94             return kTruncatedFile;
     95         }
     96 
     97         // Not all the tags store the chunk size (in bytes). Three
     98         // of them store tag-specific size information (e.g., number of
     99         // fonts) instead. This forces us to early exit when those
    100         // chunks are encountered.
    101         switch (tag) {
    102         case SK_PICT_READER_TAG:
    103             if (FLAGS_tags && !FLAGS_quiet) {
    104                 SkDebugf("SK_PICT_READER_TAG %d\n", chunkSize);
    105             }
    106             break;
    107         case SK_PICT_FACTORY_TAG:
    108             if (FLAGS_tags && !FLAGS_quiet) {
    109                 SkDebugf("SK_PICT_FACTORY_TAG %d\n", chunkSize);
    110             }
    111             // Remove this code when v21 and below are no longer supported
    112 #ifndef DISABLE_V21_COMPATIBILITY_CODE
    113             if (info.fVersion < 22) {
    114                 if (!FLAGS_quiet) {
    115                     SkDebugf("Exiting early due to format limitations\n");
    116                 }
    117                 return kSuccess;       // TODO: need to store size in bytes
    118             }
    119 #endif
    120             break;
    121         case SK_PICT_TYPEFACE_TAG:
    122             if (FLAGS_tags && !FLAGS_quiet) {
    123                 SkDebugf("SK_PICT_TYPEFACE_TAG %d\n", chunkSize);
    124                 SkDebugf("Exiting early due to format limitations\n");
    125             }
    126             return kSuccess;       // TODO: need to store size in bytes
    127             break;
    128         case SK_PICT_PICTURE_TAG:
    129             if (FLAGS_tags && !FLAGS_quiet) {
    130                 SkDebugf("SK_PICT_PICTURE_TAG %d\n", chunkSize);
    131                 SkDebugf("Exiting early due to format limitations\n");
    132             }
    133             return kSuccess;       // TODO: need to store size in bytes
    134             break;
    135         case SK_PICT_BUFFER_SIZE_TAG:
    136             if (FLAGS_tags && !FLAGS_quiet) {
    137                 SkDebugf("SK_PICT_BUFFER_SIZE_TAG %d\n", chunkSize);
    138             }
    139             break;
    140         default:
    141             if (!FLAGS_quiet) {
    142                 SkDebugf("Unknown tag %d\n", chunkSize);
    143             }
    144             return kInvalidTag;
    145         }
    146 
    147         if (!stream.move(chunkSize)) {
    148             if (!FLAGS_quiet) {
    149                 SkDebugf("seek error\n");
    150             }
    151             return kTruncatedFile;
    152         }
    153     }
    154 
    155     return kSuccess;
    156 }
    157 
    158 #if !defined SK_BUILD_FOR_IOS
    159 int main(int argc, char * const argv[]) {
    160     return tool_main(argc, (char**) argv);
    161 }
    162 #endif
    163