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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCommandLineFlags.h"
#include "SkFontDescriptor.h"
#include "SkPicture.h"
#include "SkPictureCommon.h"
#include "SkPictureData.h"
#include "SkStream.h"
#include "SkTo.h"
DEFINE_string2(input, i, "", "skp on which to report");
DEFINE_bool2(version, v, true, "version");
DEFINE_bool2(cullRect, c, true, "cullRect");
DEFINE_bool2(flags, f, true, "flags");
DEFINE_bool2(tags, t, true, "tags");
DEFINE_bool2(quiet, q, false, "quiet");
// This tool can print simple information about an SKP but its main use
// is just to check if an SKP has been truncated during the recording
// process.
// return codes:
static const int kSuccess = 0;
static const int kTruncatedFile = 1;
static const int kNotAnSKP = 2;
static const int kInvalidTag = 3;
static const int kMissingInput = 4;
static const int kIOError = 5;
int main(int argc, char** argv) {
SkCommandLineFlags::SetUsage("Prints information about an skp file");
SkCommandLineFlags::Parse(argc, argv);
if (FLAGS_input.count() != 1) {
if (!FLAGS_quiet) {
SkDebugf("Missing input file\n");
}
return kMissingInput;
}
SkFILEStream stream(FLAGS_input[0]);
if (!stream.isValid()) {
if (!FLAGS_quiet) {
SkDebugf("Couldn't open file\n");
}
return kIOError;
}
size_t totStreamSize = stream.getLength();
SkPictInfo info;
if (!SkPicture_StreamIsSKP(&stream, &info)) {
return kNotAnSKP;
}
if (FLAGS_version && !FLAGS_quiet) {
SkDebugf("Version: %d\n", info.getVersion());
}
if (FLAGS_cullRect && !FLAGS_quiet) {
SkDebugf("Cull Rect: %f,%f,%f,%f\n",
info.fCullRect.fLeft, info.fCullRect.fTop,
info.fCullRect.fRight, info.fCullRect.fBottom);
}
bool hasData;
if (!stream.readBool(&hasData)) { return kTruncatedFile; }
if (!hasData) {
// If we read true there's a picture playback object flattened
// in the file; if false, there isn't a playback, so we're done
// reading the file.
return kSuccess;
}
for (;;) {
uint32_t tag;
if (!stream.readU32(&tag)) { return kTruncatedFile; }
if (SK_PICT_EOF_TAG == tag) {
break;
}
uint32_t chunkSize;
if (!stream.readU32(&chunkSize)) { return kTruncatedFile; }
size_t curPos = stream.getPosition();
// "move" doesn't error out when seeking beyond the end of file
// so we need a preemptive check here.
if (curPos+chunkSize > totStreamSize) {
if (!FLAGS_quiet) {
SkDebugf("truncated file\n");
}
return kTruncatedFile;
}
// Not all the tags store the chunk size (in bytes). Three
// of them store tag-specific size information (e.g., number of
// fonts) instead. This forces us to early exit when those
// chunks are encountered.
switch (tag) {
case SK_PICT_READER_TAG:
if (FLAGS_tags && !FLAGS_quiet) {
SkDebugf("SK_PICT_READER_TAG %d\n", chunkSize);
}
break;
case SK_PICT_FACTORY_TAG:
if (FLAGS_tags && !FLAGS_quiet) {
SkDebugf("SK_PICT_FACTORY_TAG %d\n", chunkSize);
}
break;
case SK_PICT_TYPEFACE_TAG: {
if (FLAGS_tags && !FLAGS_quiet) {
SkDebugf("SK_PICT_TYPEFACE_TAG %d\n", chunkSize);
}
const int count = SkToInt(chunkSize);
for (int i = 0; i < count; i++) {
SkFontDescriptor desc;
if (!SkFontDescriptor::Deserialize(&stream, &desc)) {
if (!FLAGS_quiet) {
SkDebugf("File corruption in SkFontDescriptor\n");
}
return kInvalidTag;
}
}
// clear this since we've consumed all the typefaces
chunkSize = 0;
break;
}
case SK_PICT_PICTURE_TAG:
if (FLAGS_tags && !FLAGS_quiet) {
SkDebugf("SK_PICT_PICTURE_TAG %d\n", chunkSize);
SkDebugf("Exiting early due to format limitations\n");
}
return kSuccess; // TODO: need to store size in bytes
break;
case SK_PICT_BUFFER_SIZE_TAG:
if (FLAGS_tags && !FLAGS_quiet) {
SkDebugf("SK_PICT_BUFFER_SIZE_TAG %d\n", chunkSize);
}
break;
default:
if (!FLAGS_quiet) {
SkDebugf("Unknown tag %d\n", chunkSize);
}
return kInvalidTag;
}
if (!stream.move(chunkSize)) {
if (!FLAGS_quiet) {
SkDebugf("seek error\n");
}
return kTruncatedFile;
}
}
return kSuccess;
}
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