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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "SkMovie.h"
      9 #include "SkCanvas.h"
     10 #include "SkPaint.h"
     11 
     12 // We should never see this in normal operation since our time values are
     13 // 0-based. So we use it as a sentinal.
     14 #define UNINITIALIZED_MSEC ((SkMSec)-1)
     15 
     16 SkMovie::SkMovie()
     17 {
     18     fInfo.fDuration = UNINITIALIZED_MSEC;  // uninitialized
     19     fCurrTime = UNINITIALIZED_MSEC; // uninitialized
     20     fNeedBitmap = true;
     21 }
     22 
     23 void SkMovie::ensureInfo()
     24 {
     25     if (fInfo.fDuration == UNINITIALIZED_MSEC && !this->onGetInfo(&fInfo))
     26         memset(&fInfo, 0, sizeof(fInfo));   // failure
     27 }
     28 
     29 SkMSec SkMovie::duration()
     30 {
     31     this->ensureInfo();
     32     return fInfo.fDuration;
     33 }
     34 
     35 int SkMovie::width()
     36 {
     37     this->ensureInfo();
     38     return fInfo.fWidth;
     39 }
     40 
     41 int SkMovie::height()
     42 {
     43     this->ensureInfo();
     44     return fInfo.fHeight;
     45 }
     46 
     47 int SkMovie::isOpaque()
     48 {
     49     this->ensureInfo();
     50     return fInfo.fIsOpaque;
     51 }
     52 
     53 bool SkMovie::setTime(SkMSec time)
     54 {
     55     SkMSec dur = this->duration();
     56     if (time > dur)
     57         time = dur;
     58 
     59     bool changed = false;
     60     if (time != fCurrTime)
     61     {
     62         fCurrTime = time;
     63         changed = this->onSetTime(time);
     64         fNeedBitmap |= changed;
     65     }
     66     return changed;
     67 }
     68 
     69 const SkBitmap& SkMovie::bitmap()
     70 {
     71     if (fCurrTime == UNINITIALIZED_MSEC)    // uninitialized
     72         this->setTime(0);
     73 
     74     if (fNeedBitmap)
     75     {
     76         if (!this->onGetBitmap(&fBitmap))   // failure
     77             fBitmap.reset();
     78         fNeedBitmap = false;
     79     }
     80     return fBitmap;
     81 }
     82 
     83 ////////////////////////////////////////////////////////////////////
     84 
     85 #include "SkStream.h"
     86 
     87 SkMovie* SkMovie::DecodeMemory(const void* data, size_t length) {
     88     SkMemoryStream stream(data, length, false);
     89     return SkMovie::DecodeStream(&stream);
     90 }
     91 
     92 SkMovie* SkMovie::DecodeFile(const char path[]) {
     93     SkAutoTUnref<SkStreamRewindable> stream(SkStream::NewFromFile(path));
     94     return stream.get() ? SkMovie::DecodeStream(stream) : NULL;
     95 }
     96