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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 "SkPictureData.h"
     11 #include "SkPictureCommon.h"
     12 #include "SkStream.h"
     13 #include "SkFontDescriptor.h"
     14 
     15 DEFINE_string2(input, i, "", "skp on which to report");
     16 DEFINE_bool2(version, v, true, "version");
     17 DEFINE_bool2(cullRect, c, true, "cullRect");
     18 DEFINE_bool2(flags, f, true, "flags");
     19 DEFINE_bool2(tags, t, true, "tags");
     20 DEFINE_bool2(quiet, q, false, "quiet");
     21 
     22 // This tool can print simple information about an SKP but its main use
     23 // is just to check if an SKP has been truncated during the recording
     24 // process.
     25 // return codes:
     26 static const int kSuccess = 0;
     27 static const int kTruncatedFile = 1;
     28 static const int kNotAnSKP = 2;
     29 static const int kInvalidTag = 3;
     30 static const int kMissingInput = 4;
     31 static const int kIOError = 5;
     32 
     33 int 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_StreamIsSKP(&stream, &info)) {
     56         return kNotAnSKP;
     57     }
     58 
     59     if (FLAGS_version && !FLAGS_quiet) {
     60         SkDebugf("Version: %d\n", info.getVersion());
     61     }
     62     if (FLAGS_cullRect && !FLAGS_quiet) {
     63         SkDebugf("Cull Rect: %f,%f,%f,%f\n",
     64                  info.fCullRect.fLeft, info.fCullRect.fTop,
     65                  info.fCullRect.fRight, info.fCullRect.fBottom);
     66     }
     67 
     68     if (!stream.readBool()) {
     69         // If we read true there's a picture playback object flattened
     70         // in the file; if false, there isn't a playback, so we're done
     71         // reading the file.
     72         return kSuccess;
     73     }
     74 
     75     for (;;) {
     76         uint32_t tag = stream.readU32();
     77         if (SK_PICT_EOF_TAG == tag) {
     78             break;
     79         }
     80 
     81         uint32_t chunkSize = stream.readU32();
     82         size_t curPos = stream.getPosition();
     83 
     84         // "move" doesn't error out when seeking beyond the end of file
     85         // so we need a preemptive check here.
     86         if (curPos+chunkSize > totStreamSize) {
     87             if (!FLAGS_quiet) {
     88                 SkDebugf("truncated file\n");
     89             }
     90             return kTruncatedFile;
     91         }
     92 
     93         // Not all the tags store the chunk size (in bytes). Three
     94         // of them store tag-specific size information (e.g., number of
     95         // fonts) instead. This forces us to early exit when those
     96         // chunks are encountered.
     97         switch (tag) {
     98         case SK_PICT_READER_TAG:
     99             if (FLAGS_tags && !FLAGS_quiet) {
    100                 SkDebugf("SK_PICT_READER_TAG %d\n", chunkSize);
    101             }
    102             break;
    103         case SK_PICT_FACTORY_TAG:
    104             if (FLAGS_tags && !FLAGS_quiet) {
    105                 SkDebugf("SK_PICT_FACTORY_TAG %d\n", chunkSize);
    106             }
    107             break;
    108         case SK_PICT_TYPEFACE_TAG: {
    109             if (FLAGS_tags && !FLAGS_quiet) {
    110                 SkDebugf("SK_PICT_TYPEFACE_TAG %d\n", chunkSize);
    111             }
    112 
    113             const int count = SkToInt(chunkSize);
    114             for (int i = 0; i < count; i++) {
    115                 SkFontDescriptor desc;
    116                 if (!SkFontDescriptor::Deserialize(&stream, &desc)) {
    117                     if (!FLAGS_quiet) {
    118                         SkDebugf("File corruption in SkFontDescriptor\n");
    119                     }
    120                     return kInvalidTag;
    121                 }
    122             }
    123 
    124             // clear this since we've consumed all the typefaces
    125             chunkSize = 0;
    126             break;
    127         }
    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