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- /*
- * 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
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