/* * Copyright 2008 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 SkPackBits_DEFINED #define SkPackBits_DEFINED #include "include/core/SkTypes.h" class SkPackBits { public: /** Given the number of 8bit values that will be passed to Pack8, returns the worst-case size needed for the dst[] buffer. */ static size_t ComputeMaxSize8(size_t srcSize); /** Write the src array into a packed format. The packing process may end up writing more bytes than it read, so dst[] must be large enough. @param src Input array of 8bit values @param srcSize Number of entries in src[] @param dst Buffer (allocated by caller) to write the packed data into @param dstSize Number of bytes in the output buffer. @return the number of bytes written to dst[] */ static size_t Pack8(const uint8_t src[], size_t srcSize, uint8_t dst[], size_t dstSize); /** Unpack the data in src[], and expand it into dst[]. The src[] data was written by a previous call to Pack8. @param src Input data to unpack, previously created by Pack8. @param srcSize Number of bytes of src to unpack @param dst Buffer (allocated by caller) to expand the src[] into. @param dstSize Number of bytes in the output buffer. @return the number of bytes written into dst, or 0 if srcSize or dstSize are too small. */ static int Unpack8(const uint8_t src[], size_t srcSize, uint8_t dst[], size_t dstSize); }; #endif