mirror of
https://github.com/gnif/LookingGlass.git
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131 lines
No EOL
3.5 KiB
C++
131 lines
No EOL
3.5 KiB
C++
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#pragma once
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#include <string>
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#include <assert.h>
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#include <inttypes.h>
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#include <tmmintrin.h>
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#include "common/debug.h"
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#if __MINGW32__
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#if __MINGW32__
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#define INTERLOCKED_AND8 __sync_and_and_fetch
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#define INTERLOCKED_OR8 __sync_or_and_fetch
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#else
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#define INTERLOCKED_OR8 InterlockedOr8
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#define INTERLOCKED_AND8 InterlockedAnd8
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#endif
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class Util
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{
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public:
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static std::string GetSystemRoot()
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{
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std::string defaultPath;
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#if __MINGW32__
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const char * libPath = getenv("SystemRoot");
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const size_t libPathLen = strlen(libPath);
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#else
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char * libPath;
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size_t libPathLen;
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_dupenv_s(&libPath, &libPathLen, "SystemRoot");
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#endif
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if (!libPath)
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{
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DEBUG_ERROR("Unable to get the SystemRoot environment variable");
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return defaultPath;
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}
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if (!libPathLen)
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{
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DEBUG_ERROR("The SystemRoot environment variable is not set");
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#ifndef __MINGW32__
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free(libPath);
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#endif
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return defaultPath;
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}
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#ifdef _WIN64
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defaultPath = std::string(libPath) + "\\System32";
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#else
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if (IsWow64())
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{
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defaultPath = std::string(libPath) + "\\Syswow64";
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}
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else
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{
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defaultPath = std::string(libPath) + "\\System32";
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}
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#endif
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#ifndef __MINGW32__
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free(libPath);
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#endif
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return defaultPath;
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}
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static inline void BGRAtoRGB(uint8_t * orig, size_t imagesize, uint8_t * dest)
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{
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assert((uintptr_t)orig % 16 == 0);
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assert((uintptr_t)dest % 16 == 0);
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assert(imagesize % 16 == 0);
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__m128i mask_right = _mm_set_epi8
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(
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12, 13, 14, 8,
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9, 10, 4, 5,
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6, 0, 1, 2,
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-128, -128, -128, -128
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);
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__m128i mask_left = _mm_set_epi8
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(
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-128, -128, -128, -128,
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12, 13, 14, 8,
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9, 10, 4, 5,
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6, 0, 1, 2
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);
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uint8_t *end = orig + imagesize * 4;
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for (; orig != end; orig += 64, dest += 48)
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{
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_mm_prefetch((char *)(orig + 128), _MM_HINT_NTA);
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_mm_prefetch((char *)(orig + 192), _MM_HINT_NTA);
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__m128i v0 = _mm_shuffle_epi8(_mm_load_si128((__m128i *)&orig[0 ]), mask_right);
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__m128i v1 = _mm_shuffle_epi8(_mm_load_si128((__m128i *)&orig[16]), mask_left );
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__m128i v2 = _mm_shuffle_epi8(_mm_load_si128((__m128i *)&orig[32]), mask_left );
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__m128i v3 = _mm_shuffle_epi8(_mm_load_si128((__m128i *)&orig[48]), mask_left );
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v0 = _mm_alignr_epi8(v1, v0, 4);
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v1 = _mm_alignr_epi8(v2, _mm_slli_si128(v1, 4), 8);
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v2 = _mm_alignr_epi8(v3, _mm_slli_si128(v2, 4), 12);
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_mm_stream_si128((__m128i *)&dest[0 ], v0);
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_mm_stream_si128((__m128i *)&dest[16], v1);
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_mm_stream_si128((__m128i *)&dest[32], v2);
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}
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}
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}; |