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/*
* Copyright (C) 2011 University of Szeged
* Copyright (C) 2011 Felician Marton
*
* 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 FECompositeArithmeticNEON_h
#define FECompositeArithmeticNEON_h
#if ENABLE(FILTERS) && HAVE(ARM_NEON_INTRINSICS)
#include "FEComposite.h"
#include <arm_neon.h>
namespace WebCore {
template <int b1, int b4>
inline void FEComposite::computeArithmeticPixelsNeon(unsigned char* source, unsigned char* destination,
unsigned pixelArrayLength, float k1, float k2, float k3, float k4)
{
float32x4_t k1x4 = vdupq_n_f32(k1 / 255);
float32x4_t k2x4 = vdupq_n_f32(k2);
float32x4_t k3x4 = vdupq_n_f32(k3);
float32x4_t k4x4 = vdupq_n_f32(k4 * 255);
uint32x4_t max255 = vdupq_n_u32(255);
uint32_t* sourcePixel = reinterpret_cast<uint32_t*>(source);
uint32_t* destinationPixel = reinterpret_cast<uint32_t*>(destination);
uint32_t* destinationEndPixel = destinationPixel + (pixelArrayLength >> 2);
while (destinationPixel < destinationEndPixel) {
uint32x2_t temporary1 = vset_lane_u32(*sourcePixel, temporary1, 0);
uint16x4_t temporary2 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(temporary1)));
float32x4_t sourcePixelAsFloat = vcvtq_f32_u32(vmovl_u16(temporary2));
temporary1 = vset_lane_u32(*destinationPixel, temporary1, 0);
temporary2 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(temporary1)));
float32x4_t destinationPixelAsFloat = vcvtq_f32_u32(vmovl_u16(temporary2));
float32x4_t result = vmulq_f32(sourcePixelAsFloat, k2x4);
result = vmlaq_f32(result, destinationPixelAsFloat, k3x4);
if (b1)
result = vmlaq_f32(result, vmulq_f32(sourcePixelAsFloat, destinationPixelAsFloat), k1x4);
if (b4)
result = vaddq_f32(result, k4x4);
// Convert result to uint so negative values are converted to zero.
uint16x4_t temporary3 = vmovn_u32(vminq_u32(vcvtq_u32_f32(result), max255));
uint8x8_t temporary4 = vmovn_u16(vcombine_u16(temporary3, temporary3));
*destinationPixel++ = vget_lane_u32(vreinterpret_u32_u8(temporary4), 0);
++sourcePixel;
}
}
inline void FEComposite::platformArithmeticNeon(unsigned char* source, unsigned char* destination,
unsigned pixelArrayLength, float k1, float k2, float k3, float k4)
{
if (!k4) {
if (!k1) {
computeArithmeticPixelsNeon<0, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4);
return;
}
computeArithmeticPixelsNeon<1, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4);
return;
}
if (!k1) {
computeArithmeticPixelsNeon<0, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4);
return;
}
computeArithmeticPixelsNeon<1, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4);
}
} // namespace WebCore
#endif // ENABLE(FILTERS) && HAVE(ARM_NEON_INTRINSICS)
#endif // FECompositeArithmeticNEON_h
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