janwas
8a52113e60
please note: format strings must be %hs for char* arguments and %ls for wchar_t* This was SVN commit r7161.
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Convert float RGB(A) colors to unsigned byte
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*/
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#include "precompiled.h"
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#include "graphics/Color.h"
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#include "maths/MathUtil.h"
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#include "graphics/SColor.h"
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#if ARCH_X86_X64
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# include <xmmintrin.h>
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# include "lib/sysdep/arch/x86_x64/x86_x64.h"
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#endif
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static SColor4ub fallback_ConvertRGBColorTo4ub(const RGBColor& src)
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{
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SColor4ub result;
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result.R=clamp(int(src.X*255),0,255);
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result.G=clamp(int(src.Y*255),0,255);
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result.B=clamp(int(src.Z*255),0,255);
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result.A=0xff;
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return result;
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}
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// on IA32, this is replaced by an SSE assembly version in ia32.cpp
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SColor4ub (*ConvertRGBColorTo4ub)(const RGBColor& src) = fallback_ConvertRGBColorTo4ub;
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// Assembler-optimized function for color conversion
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#if ARCH_X86_X64
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static SColor4ub sse_ConvertRGBColorTo4ub(const RGBColor& src)
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{
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const __m128 zero = _mm_setzero_ps();
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const __m128 _255 = _mm_set_ss(255.0f);
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__m128 r = _mm_load_ss(&src.X);
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__m128 g = _mm_load_ss(&src.Y);
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__m128 b = _mm_load_ss(&src.Z);
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// C = min(255, 255*max(C, 0)) ( == clamp(255*C, 0, 255) )
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r = _mm_max_ss(r, zero);
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g = _mm_max_ss(g, zero);
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b = _mm_max_ss(b, zero);
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r = _mm_mul_ss(r, _255);
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g = _mm_mul_ss(g, _255);
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b = _mm_mul_ss(b, _255);
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r = _mm_min_ss(r, _255);
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g = _mm_min_ss(g, _255);
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b = _mm_min_ss(b, _255);
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// convert to integer and combine channels using bit logic
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int ri = _mm_cvtss_si32(r);
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int gi = _mm_cvtss_si32(g);
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int bi = _mm_cvtss_si32(b);
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return SColor4ub(ri, gi, bi, 0xFF);
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}
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#endif
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void ColorActivateFastImpl()
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{
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if(0)
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{
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}
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#if ARCH_X86_X64
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else if (x86_x64_cap(X86_X64_CAP_SSE))
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{
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ConvertRGBColorTo4ub = sse_ConvertRGBColorTo4ub;
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}
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#endif
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else
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{
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debug_printf(L"No SSE available. Slow fallback routines will be used.\n");
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}
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}
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