Add SkSpecialImage::extractSubset & NewFromPixmap

src/core/SkPixmap.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkConfig8888.h"
 #include "SkData.h"
@@ skipping 263 matching lines @@
     SkPaint paint;
     paint.setFilterQuality(quality);
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     surface->getCanvas()->drawBitmapRect(bitmap, SkRect::MakeIWH(dst.width(), dst.height()),
                                          &paint);
     return true;
 }
 
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
-SkAutoPixmapStorage::SkAutoPixmapStorage() : fStorage(nullptr) {}
-
-SkAutoPixmapStorage::~SkAutoPixmapStorage() {
-    this->freeStorage();
-}
-
-size_t SkAutoPixmapStorage::AllocSize(const SkImageInfo& info, size_t* rowBytes) {
-    size_t rb = info.minRowBytes();
-    if (rowBytes) {
-        *rowBytes = rb;
-    }
-    return info.getSafeSize(rb);
-}
-
-bool SkAutoPixmapStorage::tryAlloc(const SkImageInfo& info) {
-    this->freeStorage();
-
-    size_t rb;
-    size_t size = AllocSize(info, &rb);
-    if (0 == size) {
-        return false;
-    }
-    void* pixels = sk_malloc_flags(size, 0);
-    if (nullptr == pixels) {
-        return false;
-    }
-    this->reset(info, pixels, rb);
-    fStorage = pixels;
-    return true;
-}
-
-void SkAutoPixmapStorage::alloc(const SkImageInfo& info) {
-    if (!this->tryAlloc(info)) {
-        sk_throw();
-    }
-}
-
-const SkData* SkAutoPixmapStorage::detachPixelsAsData() {
-    if (!fStorage) {
-        return nullptr;
-    }
-
-    auto data = SkData::MakeFromMalloc(fStorage, this->getSafeSize());
-    fStorage = nullptr;
-    this->INHERITED::reset();
-
-    return data.release();
-}