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