SkImageSource

src/core/SkPictureData.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <new>
 #include "SkImageGenerator.h"
 #include "SkPictureData.h"
 #include "SkPictureRecord.h"
@@ skipping 416 matching lines @@
             }
             if (!buffer.isValid()) {
                 return false;
             }
             SkDEBUGCODE(haveBuffer = true;)
         } break;
     }
     return true;    // success
 }
 
-namespace {
-
-// This generator intentionally should always fail on all attempts to get its pixels,
-// simulating a bad or empty codec stream.
-class EmptyImageGenerator final : public SkImageGenerator {
-public:
-    EmptyImageGenerator(const SkImageInfo& info) : INHERITED(info) { }
-
-private:
-    typedef SkImageGenerator INHERITED;
-};
-
-} // anonymous namespace
-
 static const SkImage* create_image_from_buffer(SkReadBuffer& buffer) {
-    int width = buffer.read32();
-    int height = buffer.read32();
-    if (width <= 0 || height <= 0) {    // SkImage never has a zero dimension
-        buffer.validate(false);
-        return nullptr;
-    }
-
-    SkAutoTUnref<SkData> encoded(buffer.readByteArrayAsData());
-    if (encoded->size() == 0) {
-        // The image could not be encoded at serialization time - return an empty placeholder.
-        return SkImage::NewFromGenerator(
-            new EmptyImageGenerator(SkImageInfo::MakeN32Premul(width, height)));
-    }
-
-    int originX = buffer.read32();
-    int originY = buffer.read32();
-    if (originX < 0 || originY < 0) {
-        buffer.validate(false);
-        return nullptr;
-    }
-
-    const SkIRect subset = SkIRect::MakeXYWH(originX, originY, width, height);
-    return SkImage::NewFromEncoded(encoded, &subset);
+    return buffer.readImage();
 }
 
 // Need a shallow wrapper to return const SkPicture* to match the other factories,
 // as SkPicture::CreateFromBuffer() returns SkPicture*
 static const SkPicture* create_picture_from_buffer(SkReadBuffer& buffer) {
     return SkPicture::CreateFromBuffer(buffer);
 }
 
 template <typename T>
 bool new_array_from_buffer(SkReadBuffer& buffer, uint32_t inCount,
@@ skipping 170 matching lines @@
     }
 }
 
 bool SkPictureData::suitableForLayerOptimization() const {
     return fContentInfo.numLayers() > 0;
 }
 #endif
 ///////////////////////////////////////////////////////////////////////////////