mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-26 06:11:37 +00:00
72 lines
2.8 KiB
C++
72 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsSVGMaskFrameNEON.h"
|
|
#include "nsSVGMaskFrame.h"
|
|
#include <arm_neon.h>
|
|
|
|
void
|
|
ComputesRGBLuminanceMask_NEON(const uint8_t *aSourceData,
|
|
int32_t aSourceStride,
|
|
uint8_t *aDestData,
|
|
int32_t aDestStride,
|
|
const IntSize &aSize,
|
|
float aOpacity)
|
|
{
|
|
int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
|
|
int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
|
|
int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
|
|
const uint8_t *sourcePixel = aSourceData;
|
|
int32_t sourceOffset = aSourceStride - 4 * aSize.width;
|
|
uint8_t *destPixel = aDestData;
|
|
int32_t destOffset = aDestStride - aSize.width;
|
|
|
|
sourcePixel = aSourceData;
|
|
int32_t remainderWidth = aSize.width % 8;
|
|
int32_t roundedWidth = aSize.width - remainderWidth;
|
|
uint16x8_t temp;
|
|
uint8x8_t gray;
|
|
uint8x8_t redVector = vdup_n_u8(redFactor);
|
|
uint8x8_t greenVector = vdup_n_u8(greenFactor);
|
|
uint8x8_t blueVector = vdup_n_u8(blueFactor);
|
|
uint8x8_t fullBitVector = vdup_n_u8(255);
|
|
uint8x8_t oneVector = vdup_n_u8(1);
|
|
for (int32_t y = 0; y < aSize.height; y++) {
|
|
// Calculate luminance by neon with 8 pixels per loop
|
|
for (int32_t x = 0; x < roundedWidth; x += 8) {
|
|
uint8x8x4_t argb = vld4_u8(sourcePixel);
|
|
temp = vmull_u8(argb.val[GFX_ARGB32_OFFSET_R], redVector); // temp = red * redFactor
|
|
temp = vmlal_u8(temp, argb.val[GFX_ARGB32_OFFSET_G], greenVector); // temp += green * greenFactor
|
|
temp = vmlal_u8(temp, argb.val[GFX_ARGB32_OFFSET_B], blueVector); // temp += blue * blueFactor
|
|
gray = vshrn_n_u16(temp, 8); // gray = temp >> 8
|
|
|
|
// Check alpha value
|
|
uint8x8_t alphaVector = vtst_u8(argb.val[GFX_ARGB32_OFFSET_A], fullBitVector);
|
|
gray = vmul_u8(gray, vand_u8(alphaVector, oneVector));
|
|
|
|
// Put the result to the 8 pixels
|
|
vst1_u8(destPixel, gray);
|
|
sourcePixel += 8 * 4;
|
|
destPixel += 8;
|
|
}
|
|
|
|
// Calculate the rest pixels of the line by cpu
|
|
for (int32_t x = 0; x < remainderWidth; x++) {
|
|
if (sourcePixel[GFX_ARGB32_OFFSET_A] > 0) {
|
|
*destPixel = (redFactor * sourcePixel[GFX_ARGB32_OFFSET_R]+
|
|
greenFactor * sourcePixel[GFX_ARGB32_OFFSET_G] +
|
|
blueFactor * sourcePixel[GFX_ARGB32_OFFSET_B]) >> 8;
|
|
} else {
|
|
*destPixel = 0;
|
|
}
|
|
sourcePixel += 4;
|
|
destPixel++;
|
|
}
|
|
sourcePixel += sourceOffset;
|
|
destPixel += destOffset;
|
|
}
|
|
}
|
|
|