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      1 /*
      2  * Copyright 2012 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 "gm.h"
      9 #include "SkBitmapFactory.h"
     10 #include "SkCanvas.h"
     11 #include "SkData.h"
     12 #include "SkImageDecoder.h"
     13 #include "SkLruImageCache.h"
     14 #include "SkOSFile.h"
     15 #include "SkStream.h"
     16 
     17 namespace skiagm {
     18 
     19 /**
     20  *  Draw a PNG created by SkBitmapFactory.
     21  */
     22 class FactoryGM : public GM {
     23 public:
     24     FactoryGM() {}
     25 
     26 protected:
     27     virtual void onOnceBeforeDraw() SK_OVERRIDE {
     28         // Copyright-free file from http://openclipart.org/detail/29213/paper-plane-by-ddoo
     29         SkString filename = SkOSPath::SkPathJoin(INHERITED::gResourcePath.c_str(),
     30                                                  "plane.png");
     31 
     32         SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(filename.c_str()));
     33         if (NULL != stream.get()) {
     34             stream->rewind();
     35             size_t length = stream->getLength();
     36             void* buffer = sk_malloc_throw(length);
     37             stream->read(buffer, length);
     38             SkAutoDataUnref data(SkData::NewFromMalloc(buffer, length));
     39             SkBitmapFactory factory(&SkImageDecoder::DecodeMemoryToTarget);
     40             // Create a cache which will boot the pixels out anytime the
     41             // bitmap is unlocked.
     42             SkAutoTUnref<SkLruImageCache> cache(SkNEW_ARGS(SkLruImageCache, (1)));
     43             factory.setImageCache(cache);
     44             factory.installPixelRef(data, &fBitmap);
     45         }
     46     }
     47 
     48     virtual SkString onShortName() {
     49         return SkString("factory");
     50     }
     51 
     52     virtual SkISize onISize() {
     53         return make_isize(640, 480);
     54     }
     55 
     56     virtual void onDraw(SkCanvas* canvas) {
     57         canvas->drawBitmap(fBitmap, 0, 0);
     58     }
     59 
     60 private:
     61     SkBitmap fBitmap;
     62 
     63     typedef GM INHERITED;
     64 };
     65 
     66 //////////////////////////////////////////////////////////////////////////////
     67 
     68 static GM* MyFactory(void*) { return new FactoryGM; }
     69 static GMRegistry reg(MyFactory);
     70 
     71 }
     72