forked from bartvdbraak/blender
Brecht Van Lommel
1eeb846e78
This was disabled to avoid updating the geometry every time when the material includes displacement, because there was no way to distinguish between surface shader and displacement updates. As a solution, we now compute an MD5 hash of the nodes linked to the displacement socket, and only update the mesh if that changes. Differential Revision: https://developer.blender.org/D3018
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
/*
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* Copyright (C) 1999, 2002 Aladdin Enterprises. All rights reserved.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* L. Peter Deutsch
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* ghost@aladdin.com
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*/
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/* MD5
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*
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* Simply MD5 hash computation, used by disk cache. Adapted from external
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* code, with minor code modifications done to remove some unused code and
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* change code style. */
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#ifndef __UTIL_MD5_H__
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#define __UTIL_MD5_H__
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#include "util/util_string.h"
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#include "util/util_types.h"
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CCL_NAMESPACE_BEGIN
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class MD5Hash {
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public:
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MD5Hash();
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~MD5Hash();
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void append(const uint8_t *data, int size);
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void append(const string& str);
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bool append_file(const string& filepath);
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string get_hex();
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protected:
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void process(const uint8_t *data);
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void finish(uint8_t digest[16]);
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uint32_t count[2]; /* message length in bits, lsw first */
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uint32_t abcd[4]; /* digest buffer */
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uint8_t buf[64]; /* accumulate block */
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};
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string util_md5_string(const string& str);
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CCL_NAMESPACE_END
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#endif /* __UTIL_MD5_H__ */
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