/*
* 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 FEGaussianBlurNEON_h
#define FEGaussianBlurNEON_h
#if HAVE(ARM_NEON_INTRINSICS)
#include "platform/graphics/cpu/arm/filters/NEONHelpers.h"
#include "platform/graphics/filters/FEGaussianBlur.h"
namespace WebCore {
inline void boxBlurNEON(Uint8ClampedArray* srcPixelArray, Uint8ClampedArray* dstPixelArray,
unsigned dx, int dxLeft, int dxRight, int stride, int strideLine, int effectWidth, int effectHeight)
{
uint32_t* sourcePixel = reinterpret_cast<uint32_t*>(srcPixelArray->data());
uint32_t* destinationPixel = reinterpret_cast<uint32_t*>(dstPixelArray->data());
float32x4_t deltaX = vdupq_n_f32(1.0 / dx);
int pixelLine = strideLine / 4;
int pixelStride = stride / 4;
for (int y = 0; y < effectHeight; ++y) {
int line = y * pixelLine;
float32x4_t sum = vdupq_n_f32(0);
// Fill the kernel
int maxKernelSize = std::min(dxRight, effectWidth);
for (int i = 0; i < maxKernelSize; ++i) {
float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel + line + i * pixelStride);
sum = vaddq_f32(sum, sourcePixelAsFloat);
}
// Blurring
for (int x = 0; x < effectWidth; ++x) {
int pixelOffset = line + x * pixelStride;
float32x4_t result = vmulq_f32(sum, deltaX);
storeFloatAsRGBA8(result, destinationPixel + pixelOffset);
if (x >= dxLeft) {
float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel + pixelOffset - dxLeft * pixelStride);
sum = vsubq_f32(sum, sourcePixelAsFloat);
}
if (x + dxRight < effectWidth) {
float32x4_t sourcePixelAsFloat = loadRGBA8AsFloat(sourcePixel + pixelOffset + dxRight * pixelStride);
sum = vaddq_f32(sum, sourcePixelAsFloat);
}
}
}
}
} // namespace WebCore
#endif // HAVE(ARM_NEON_INTRINSICS)
#endif // FEGaussianBlurNEON_h