Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "InlineTranslator.h"
       8             : #include "RecordedEventImpl.h"
       9             : #include "DrawEventRecorder.h"
      10             : 
      11             : #include "gfxContext.h"
      12             : #include "nsDeviceContext.h"
      13             : #include "mozilla/gfx/RecordingTypes.h"
      14             : #include "mozilla/UniquePtr.h"
      15             : 
      16             : using namespace mozilla::gfx;
      17             : 
      18             : namespace mozilla {
      19             : namespace gfx {
      20             : 
      21           0 : InlineTranslator::InlineTranslator(DrawTarget* aDT, void* aFontContext)
      22             :   : mBaseDT(aDT)
      23           0 :   , mFontContext(aFontContext)
      24             : {
      25           0 : }
      26             : 
      27             : bool
      28           0 : InlineTranslator::TranslateRecording(char *aData, size_t aLen)
      29             : {
      30             :   // an istream like class for reading from memory
      31             :   struct MemReader {
      32           0 :     MemReader(char *aData, size_t aLen) : mData(aData), mEnd(aData + aLen) {}
      33           0 :     void read(char* s, streamsize n) {
      34           0 :       if (n <= (mEnd - mData)) {
      35           0 :         memcpy(s, mData, n);
      36           0 :         mData += n;
      37             :       } else {
      38             :         // We've requested more data than is available
      39             :         // set the Reader into an eof state
      40           0 :         mData = mEnd + 1;
      41             :       }
      42           0 :     }
      43           0 :     bool eof() {
      44           0 :       return mData > mEnd;
      45             :     }
      46           0 :     bool good() {
      47           0 :       return !eof();
      48             :     }
      49             : 
      50             :     char *mData;
      51             :     char *mEnd;
      52             :   };
      53           0 :   MemReader reader(aData, aLen);
      54             : 
      55             :   uint32_t magicInt;
      56           0 :   ReadElement(reader, magicInt);
      57           0 :   if (magicInt != mozilla::gfx::kMagicInt) {
      58           0 :     return false;
      59             :   }
      60             : 
      61             :   uint16_t majorRevision;
      62           0 :   ReadElement(reader, majorRevision);
      63           0 :   if (majorRevision != kMajorRevision) {
      64           0 :     return false;
      65             :   }
      66             : 
      67             :   uint16_t minorRevision;
      68           0 :   ReadElement(reader, minorRevision);
      69           0 :   if (minorRevision > kMinorRevision) {
      70           0 :     return false;
      71             :   }
      72             : 
      73             :   int32_t eventType;
      74           0 :   ReadElement(reader, eventType);
      75           0 :   while (reader.good()) {
      76             :     UniquePtr<RecordedEvent> recordedEvent(
      77             :       RecordedEvent::LoadEvent(reader,
      78           0 :       static_cast<RecordedEvent::EventType>(eventType)));
      79             : 
      80             :     // Make sure that the whole event was read from the stream successfully.
      81           0 :     if (!reader.good() || !recordedEvent) {
      82           0 :       return false;
      83             :     }
      84             : 
      85           0 :     if (!recordedEvent->PlayEvent(this)) {
      86           0 :       return false;
      87             :     }
      88             : 
      89           0 :     ReadElement(reader, eventType);
      90             :   }
      91             : 
      92           0 :   return true;
      93             : }
      94             : 
      95             : already_AddRefed<DrawTarget>
      96           0 : InlineTranslator::CreateDrawTarget(ReferencePtr aRefPtr,
      97             :                                   const gfx::IntSize &aSize,
      98             :                                   gfx::SurfaceFormat aFormat)
      99             : {
     100           0 :   RefPtr<DrawTarget> drawTarget = mBaseDT;
     101           0 :   AddDrawTarget(aRefPtr, drawTarget);
     102           0 :   return drawTarget.forget();
     103             : }
     104             : 
     105             : } // namespace gfx
     106             : } // namespace mozilla