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/*
* Copyright (C) 2011 University of Szeged
* Copyright (C) 2011 Zoltan Herczeg
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FELightingNeon_h
#define FELightingNeon_h
#include <wtf/Platform.h>
#if CPU(ARM_NEON) && CPU(ARM_TRADITIONAL) && COMPILER(GCC)
#include "FELighting.h"
#include <wtf/Alignment.h>
#include <wtf/ParallelJobs.h>
namespace WebCore {
// Otherwise: Distant Light.
#define FLAG_POINT_LIGHT 0x01
#define FLAG_SPOT_LIGHT 0x02
#define FLAG_CONE_EXPONENT_IS_1 0x04
// Otherwise: Diffuse light.
#define FLAG_SPECULAR_LIGHT 0x10
#define FLAG_DIFFUSE_CONST_IS_1 0x20
#define FLAG_SPECULAR_EXPONENT_IS_1 0x40
// Must be aligned to 16 bytes.
struct FELightingFloatArgumentsForNeon {
float surfaceScale;
float minusSurfaceScaleDividedByFour;
float diffuseConstant;
float padding1;
float coneCutOffLimit;
float coneFullLight;
float coneCutOffRange;
float constOne;
float lightX;
float lightY;
float lightZ;
float padding2;
float directionX;
float directionY;
float directionZ;
float padding3;
float colorRed;
float colorGreen;
float colorBlue;
float padding4;
};
struct FELightingPaintingDataForNeon {
unsigned char* pixels;
float yStart;
int widthDecreasedByTwo;
int absoluteHeight;
// Combination of FLAG constants above.
int flags;
int specularExponent;
int coneExponent;
FELightingFloatArgumentsForNeon* floatArguments;
short* paintingConstants;
};
short* feLightingConstantsForNeon();
extern "C" {
void neonDrawLighting(FELightingPaintingDataForNeon*);
}
inline void FELighting::platformApplyNeon(LightingData& data, LightSource::PaintingData& paintingData)
{
WTF_ALIGNED(FELightingFloatArgumentsForNeon, floatArguments, 16);
FELightingPaintingDataForNeon neonData = {
data.pixels->data(),
1,
data.widthDecreasedByOne - 1,
data.heightDecreasedByOne - 1,
0,
0,
0,
&floatArguments,
feLightingConstantsForNeon()
};
// Set light source arguments.
floatArguments.constOne = 1;
floatArguments.colorRed = m_lightingColor.red();
floatArguments.colorGreen = m_lightingColor.green();
floatArguments.colorBlue = m_lightingColor.blue();
floatArguments.padding4 = 0;
if (m_lightSource->type() == LS_POINT) {
neonData.flags |= FLAG_POINT_LIGHT;
PointLightSource* pointLightSource = static_cast<PointLightSource*>(m_lightSource.get());
floatArguments.lightX = pointLightSource->position().x();
floatArguments.lightY = pointLightSource->position().y();
floatArguments.lightZ = pointLightSource->position().z();
floatArguments.padding2 = 0;
} else if (m_lightSource->type() == LS_SPOT) {
neonData.flags |= FLAG_SPOT_LIGHT;
SpotLightSource* spotLightSource = static_cast<SpotLightSource*>(m_lightSource.get());
floatArguments.lightX = spotLightSource->position().x();
floatArguments.lightY = spotLightSource->position().y();
floatArguments.lightZ = spotLightSource->position().z();
floatArguments.padding2 = 0;
floatArguments.directionX = paintingData.directionVector.x();
floatArguments.directionY = paintingData.directionVector.y();
floatArguments.directionZ = paintingData.directionVector.z();
floatArguments.padding3 = 0;
floatArguments.coneCutOffLimit = paintingData.coneCutOffLimit;
floatArguments.coneFullLight = paintingData.coneFullLight;
floatArguments.coneCutOffRange = paintingData.coneCutOffLimit - paintingData.coneFullLight;
neonData.coneExponent = getPowerCoefficients(spotLightSource->specularExponent());
if (spotLightSource->specularExponent() == 1)
neonData.flags |= FLAG_CONE_EXPONENT_IS_1;
} else {
ASSERT(m_lightSource->type() == LS_DISTANT);
floatArguments.lightX = paintingData.lightVector.x();
floatArguments.lightY = paintingData.lightVector.y();
floatArguments.lightZ = paintingData.lightVector.z();
floatArguments.padding2 = 1;
}
// Set lighting arguments.
floatArguments.surfaceScale = data.surfaceScale;
floatArguments.minusSurfaceScaleDividedByFour = -data.surfaceScale / 4;
if (m_lightingType == FELighting::DiffuseLighting)
floatArguments.diffuseConstant = m_diffuseConstant;
else {
neonData.flags |= FLAG_SPECULAR_LIGHT;
floatArguments.diffuseConstant = m_specularConstant;
neonData.specularExponent = getPowerCoefficients(m_specularExponent);
if (m_specularExponent == 1)
neonData.flags |= FLAG_SPECULAR_EXPONENT_IS_1;
}
if (floatArguments.diffuseConstant == 1)
neonData.flags |= FLAG_DIFFUSE_CONST_IS_1;
int optimalThreadNumber = ((data.widthDecreasedByOne - 1) * (data.heightDecreasedByOne - 1)) / s_minimalRectDimension;
if (optimalThreadNumber > 1) {
// Initialize parallel jobs
ParallelJobs<FELightingPaintingDataForNeon> parallelJobs(&WebCore::FELighting::platformApplyNeonWorker, optimalThreadNumber);
// Fill the parameter array
int job = parallelJobs.numberOfJobs();
if (job > 1) {
int yStart = 1;
int yStep = (data.heightDecreasedByOne - 1) / job;
for (--job; job >= 0; --job) {
FELightingPaintingDataForNeon& params = parallelJobs.parameter(job);
params = neonData;
params.yStart = yStart;
params.pixels += (yStart - 1) * (data.widthDecreasedByOne + 1) * 4;
if (job > 0) {
params.absoluteHeight = yStep;
yStart += yStep;
} else
params.absoluteHeight = data.heightDecreasedByOne - yStart;
}
parallelJobs.execute();
return;
}
}
neonDrawLighting(&neonData);
}
} // namespace WebCore
#endif // CPU(ARM_NEON) && COMPILER(GCC)
#endif // FELightingNeon_h
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