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      1 /*
      2  * Copyright 2011 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 #include "Movie.h"
      8 #include "SkCanvas.h"
      9 #include "SkPaint.h"
     10 
     11 // We should never see this in normal operation since our time values are
     12 // 0-based. So we use it as a sentinal.
     13 #define UNINITIALIZED_MSEC ((SkMSec)-1)
     14 
     15 Movie::Movie()
     16 {
     17     fInfo.fDuration = UNINITIALIZED_MSEC;  // uninitialized
     18     fCurrTime = UNINITIALIZED_MSEC; // uninitialized
     19     fNeedBitmap = true;
     20 }
     21 
     22 void Movie::ensureInfo()
     23 {
     24     if (fInfo.fDuration == UNINITIALIZED_MSEC && !this->onGetInfo(&fInfo))
     25         memset(&fInfo, 0, sizeof(fInfo));   // failure
     26 }
     27 
     28 SkMSec Movie::duration()
     29 {
     30     this->ensureInfo();
     31     return fInfo.fDuration;
     32 }
     33 
     34 int Movie::width()
     35 {
     36     this->ensureInfo();
     37     return fInfo.fWidth;
     38 }
     39 
     40 int Movie::height()
     41 {
     42     this->ensureInfo();
     43     return fInfo.fHeight;
     44 }
     45 
     46 int Movie::isOpaque()
     47 {
     48     this->ensureInfo();
     49     return fInfo.fIsOpaque;
     50 }
     51 
     52 bool Movie::setTime(SkMSec time)
     53 {
     54     SkMSec dur = this->duration();
     55     if (time > dur)
     56         time = dur;
     57 
     58     bool changed = false;
     59     if (time != fCurrTime)
     60     {
     61         fCurrTime = time;
     62         changed = this->onSetTime(time);
     63         fNeedBitmap |= changed;
     64     }
     65     return changed;
     66 }
     67 
     68 const SkBitmap& Movie::bitmap()
     69 {
     70     if (fCurrTime == UNINITIALIZED_MSEC)    // uninitialized
     71         this->setTime(0);
     72 
     73     if (fNeedBitmap)
     74     {
     75         if (!this->onGetBitmap(&fBitmap))   // failure
     76             fBitmap.reset();
     77         fNeedBitmap = false;
     78     }
     79     return fBitmap;
     80 }
     81 
     82 ////////////////////////////////////////////////////////////////////
     83 
     84 #include "SkStream.h"
     85 
     86 Movie* Movie::DecodeMemory(const void* data, size_t length) {
     87     SkMemoryStream stream(data, length, false);
     88     return Movie::DecodeStream(&stream);
     89 }
     90 
     91 Movie* Movie::DecodeFile(const char path[]) {
     92     std::unique_ptr<SkStreamRewindable> stream = SkStream::MakeFromFile(path);
     93     return stream ? Movie::DecodeStream(stream.get()) : nullptr;
     94 }
     95