robertphillips | c5035e7 | 2016-03-17 06:58:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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 "SkAutoPixmapStorage.h" |
| 9 | #include "SkData.h" |
| 10 | |
| 11 | SkAutoPixmapStorage::SkAutoPixmapStorage() : fStorage(nullptr) {} |
| 12 | |
| 13 | SkAutoPixmapStorage::~SkAutoPixmapStorage() { |
| 14 | this->freeStorage(); |
| 15 | } |
| 16 | |
| 17 | size_t SkAutoPixmapStorage::AllocSize(const SkImageInfo& info, size_t* rowBytes) { |
| 18 | size_t rb = info.minRowBytes(); |
| 19 | if (rowBytes) { |
| 20 | *rowBytes = rb; |
| 21 | } |
| 22 | return info.getSafeSize(rb); |
| 23 | } |
| 24 | |
| 25 | bool SkAutoPixmapStorage::tryAlloc(const SkImageInfo& info) { |
| 26 | this->freeStorage(); |
| 27 | |
| 28 | size_t rb; |
| 29 | size_t size = AllocSize(info, &rb); |
| 30 | if (0 == size) { |
| 31 | return false; |
| 32 | } |
| 33 | void* pixels = sk_malloc_flags(size, 0); |
| 34 | if (nullptr == pixels) { |
| 35 | return false; |
| 36 | } |
| 37 | this->reset(info, pixels, rb); |
| 38 | fStorage = pixels; |
| 39 | return true; |
| 40 | } |
| 41 | |
| 42 | void SkAutoPixmapStorage::alloc(const SkImageInfo& info) { |
| 43 | if (!this->tryAlloc(info)) { |
| 44 | sk_throw(); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | const SkData* SkAutoPixmapStorage::detachPixelsAsData() { |
| 49 | if (!fStorage) { |
| 50 | return nullptr; |
| 51 | } |
| 52 | |
| 53 | auto data = SkData::MakeFromMalloc(fStorage, this->getSafeSize()); |
| 54 | fStorage = nullptr; |
| 55 | this->INHERITED::reset(); |
| 56 | |
| 57 | return data.release(); |
| 58 | } |