Fixes for JPEG subset decoding.

include/images/SkBitmapRegionDecoder.h

-/*
- * Copyright 2011 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkBitmapRegionDecoder_DEFINED
-#define SkBitmapRegionDecoder_DEFINED
-
-#include "SkBitmap.h"
-#include "SkImageDecoder.h"
-#include "SkStream.h"
-
-struct SkIRect;
-
-/**
- * SkBitmapRegionDecoder can be used to decode a specified rect from an image.
- * This is particularly useful when the original image is large and you only
- * need parts of the image.
- *
- * However, not all image codecs on all platforms support this feature so be
- * prepared to fallback to standard decoding if decodeRegion(...) returns false.
- */
-class SkBitmapRegionDecoder {
-public:
-    SkBitmapRegionDecoder(SkImageDecoder* decoder, SkStream* stream,
-                          int width, int height) {
-        fDecoder = decoder;
-        fStream = stream;
-        fWidth = width;
-        fHeight = height;
-    }
-    ~SkBitmapRegionDecoder() {
-        SkDELETE(fDecoder);
-        SkSafeUnref(fStream);
-    }
-
-    bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect,
-                      SkBitmap::Config pref, int sampleSize);
-
-    SkImageDecoder* getDecoder() const { return fDecoder; }
-    int getWidth() const { return fWidth; }
-    int getHeight() const { return fHeight; }
-
-private:
-    SkImageDecoder* fDecoder;
-    SkStream* fStream;
-    int fWidth;
-    int fHeight;
-};
-
-#endif