/* Copyright (C) 2022 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 .
*/
#include "precompiled.h"
#include "graphics/Color.h"
#include "graphics/SColor.h"
#include "lib/sysdep/arch/x86_x64/simd.h"
#include "maths/MathUtil.h"
#include "ps/CLogger.h"
#include "ps/CStr.h"
#if COMPILER_HAS_SSE
#include
#endif
static SColor4ub ConvertRGBColorTo4ubFallback(const RGBColor& src)
{
SColor4ub result;
result.R = Clamp(static_cast(src.X * 255), 0, 255);
result.G = Clamp(static_cast(src.Y * 255), 0, 255);
result.B = Clamp(static_cast(src.Z * 255), 0, 255);
result.A = 255;
return result;
}
// on IA32, this is replaced by an SSE assembly version in ia32.cpp
SColor4ub (*ConvertRGBColorTo4ub)(const RGBColor& src) = ConvertRGBColorTo4ubFallback;
// Assembler-optimized function for color conversion
#if COMPILER_HAS_SSE
static SColor4ub ConvertRGBColorTo4ubSSE(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 COMPILER_HAS_SSE
if (HostHasSSE())
{
ConvertRGBColorTo4ub = ConvertRGBColorTo4ubSSE;
return;
}
#elif defined(ARCH_X86_64)
debug_printf("No SSE available. Slow fallback routines will be used.\n");
#endif
}
/**
* Important: This function does not modify the value if parsing fails.
*/
bool CColor::ParseString(const CStr8& value, int defaultAlpha)
{
const size_t NUM_VALS = 4;
int values[NUM_VALS] = { 0, 0, 0, defaultAlpha };
std::stringstream stream;
stream.str(value);
// Parse each value
size_t i;
for (i = 0; i < NUM_VALS; ++i)
{
if (stream.eof())
break;
stream >> values[i];
if ((stream.rdstate() & std::stringstream::failbit) != 0)
{
LOGWARNING("Unable to parse CColor parameters. Your input: '%s'", value.c_str());
return false;
}
if (values[i] < 0 || values[i] > 255)
{
LOGWARNING("Invalid value (<0 or >255) when parsing CColor parameters. Your input: '%s'", value.c_str());
return false;
}
}
if (i < 3)
{
LOGWARNING("Not enough parameters when parsing as CColor. Your input: '%s'", value.c_str());
return false;
}
if (!stream.eof())
{
LOGWARNING("Too many parameters when parsing as CColor. Your input: '%s'", value.c_str());
return false;
}
r = values[0] / 255.f;
g = values[1] / 255.f;
b = values[2] / 255.f;
a = values[3] / 255.f;
return true;
}
bool CColor::operator==(const CColor& color) const
{
return
r == color.r &&
g == color.g &&
b == color.b &&
a == color.a;
}