mirror of
https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-09-29 05:18:36 +00:00
101 lines
3 KiB
C++
101 lines
3 KiB
C++
|
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
|
||
|
|
// Copyright (C) 2010 Winch Gate Property Limited
|
||
|
|
//
|
||
|
|
// This program is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU Affero General Public License as
|
||
|
|
// published by the Free Software Foundation, either version 3 of the
|
||
|
|
// License, or (at your option) any later version.
|
||
|
|
//
|
||
|
|
// This program 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 Affero General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU Affero General Public License
|
||
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
#include "std3d.h"
|
||
|
|
#include "nel/3d/ps_attrib_maker_template.h"
|
||
|
|
#include "nel/misc/system_info.h"
|
||
|
|
|
||
|
|
|
||
|
|
namespace NL3D
|
||
|
|
{
|
||
|
|
|
||
|
|
|
||
|
|
void computeGradient(const NLMISC::CRGBA *valueTab, uint32 numValues, uint32 nbStages, CPSVector<NLMISC::CRGBA>::V &grad, NLMISC::CRGBA &minValue, NLMISC::CRGBA &maxValue)
|
||
|
|
{
|
||
|
|
nlassert(numValues > 1);
|
||
|
|
nlassert(nbStages > 0);
|
||
|
|
|
||
|
|
maxValue = minValue = valueTab[0];
|
||
|
|
uint nbValues = (numValues - 1) * nbStages;
|
||
|
|
grad.resize(nbValues + 1);
|
||
|
|
|
||
|
|
|
||
|
|
float step = 1.0f / float(nbStages);
|
||
|
|
float alpha;
|
||
|
|
|
||
|
|
NLMISC::CRGBA *dest = &grad[0];
|
||
|
|
#if defined(NL_OS_WINDOWS) && !defined(NL_NO_ASM)
|
||
|
|
float stepX127 = 127.f * step;
|
||
|
|
if (NLMISC::CSystemInfo::hasMMX())
|
||
|
|
{
|
||
|
|
// do interpolation using mmx
|
||
|
|
for (uint32 k = 0; k < (numValues - 1); ++k)
|
||
|
|
{
|
||
|
|
uint32 col0 = *(uint32 *) &valueTab[k];
|
||
|
|
uint64 stepPacked;
|
||
|
|
sint16 *step = (sint16 *) &stepPacked;
|
||
|
|
step[0] = (sint16) (stepX127 * (valueTab[k + 1].R - valueTab[k].R));
|
||
|
|
step[1] = (sint16) (stepX127 * (valueTab[k + 1].G - valueTab[k].G));
|
||
|
|
step[2] = (sint16) (stepX127 * (valueTab[k + 1].B - valueTab[k].B));
|
||
|
|
step[3] = (sint16) (stepX127 * (valueTab[k + 1].A - valueTab[k].A));
|
||
|
|
__asm
|
||
|
|
{
|
||
|
|
pxor mm0, mm0 // mm0 = 0
|
||
|
|
movd mm1, col0
|
||
|
|
punpcklbw mm0, mm1 // store current col in mm0, each component is stored in 7:8 fixed integer
|
||
|
|
psrlw mm0, 1
|
||
|
|
movq mm2, stepPacked // store step for gradient
|
||
|
|
mov edi, dest
|
||
|
|
mov eax, 4
|
||
|
|
mov ecx, nbStages
|
||
|
|
sub edi, eax
|
||
|
|
myLoop:
|
||
|
|
// unpack current color
|
||
|
|
movq mm1, mm0
|
||
|
|
add edi, eax // advance destination
|
||
|
|
psrlw mm1, 7
|
||
|
|
packuswb mm1, mm1
|
||
|
|
movd [edi], mm1 // store result
|
||
|
|
paddsw mm0, mm2 // increment color
|
||
|
|
dec ecx
|
||
|
|
jne myLoop
|
||
|
|
emms
|
||
|
|
}
|
||
|
|
dest += nbStages;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
// copy the tab performing linear interpolation between values given in parameter
|
||
|
|
for (uint32 k = 0; k < (numValues - 1); ++k)
|
||
|
|
{
|
||
|
|
alpha = 0;
|
||
|
|
|
||
|
|
for(uint32 l = 0; l < nbStages; ++l)
|
||
|
|
{
|
||
|
|
// use the right version of the template function PSValueBlend
|
||
|
|
// to do the job
|
||
|
|
*dest++ = PSValueBlend(valueTab[k], valueTab[k + 1], alpha);
|
||
|
|
alpha += step;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*dest = valueTab[numValues - 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|