/* * Copyright 2016 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef SkYUVASizeInfo_DEFINED #define SkYUVASizeInfo_DEFINED #include "include/codec/SkEncodedOrigin.h" #include "include/core/SkImageInfo.h" #include "include/core/SkSize.h" struct SK_API SkYUVASizeInfo { static constexpr auto kMaxCount = 4; SkISize fSizes[kMaxCount]; /** * While the widths of the Y, U, V and A planes are not restricted, the * implementation often requires that the width of the memory allocated * for each plane be a multiple of 8. * * This struct allows us to inform the client how many "widthBytes" * that we need. Note that we use the new idea of "widthBytes" * because this idea is distinct from "rowBytes" (used elsewhere in * Skia). "rowBytes" allow the last row of the allocation to not * include any extra padding, while, in this case, every single row of * the allocation must be at least "widthBytes". */ size_t fWidthBytes[kMaxCount]; /** * YUVA data often comes from formats like JPEG that support EXIF orientation. * Code that operates on the raw YUV data often needs to know that orientation. */ SkEncodedOrigin fOrigin = kDefault_SkEncodedOrigin; bool operator==(const SkYUVASizeInfo& that) const { for (int i = 0; i < kMaxCount; ++i) { SkASSERT((!fSizes[i].isEmpty() && fWidthBytes[i]) || (fSizes[i].isEmpty() && !fWidthBytes[i])); if (fSizes[i] != that.fSizes[i] || fWidthBytes[i] != that.fWidthBytes[i]) { return false; } } return true; } size_t computeTotalBytes() const { size_t totalBytes = 0; for (int i = 0; i < kMaxCount; ++i) { SkASSERT((!fSizes[i].isEmpty() && fWidthBytes[i]) || (fSizes[i].isEmpty() && !fWidthBytes[i])); totalBytes += fWidthBytes[i] * fSizes[i].height(); } return totalBytes; } void computePlanes(void* base, void* planes[kMaxCount]) const; }; #endif // SkYUVASizeInfo_DEFINED