mirror of
https://github.com/Raymo111/i3lock-color.git
synced 2024-12-02 14:05:43 -05:00
79 lines
3.2 KiB
C
79 lines
3.2 KiB
C
/*
|
|
* vim:ts=4:sw=4:expandtab
|
|
*
|
|
* © 2016 Sebastian Frysztak
|
|
*
|
|
* See LICENSE for licensing information
|
|
*
|
|
*/
|
|
|
|
|
|
// number of xmm registers needed to store input pixels for given kernel size
|
|
#ifdef __SSE2__
|
|
#include "blur.h"
|
|
#define REGISTERS_CNT (KERNEL_SIZE + 4/2) / 4
|
|
#include <xmmintrin.h>
|
|
void blur_impl_horizontal_pass_sse2(uint32_t *src, uint32_t *dst, int width, int height) {
|
|
uint32_t* o_src = src;
|
|
for (int row = 0; row < height; row++) {
|
|
for (int column = 0; column < width; column++, src++) {
|
|
__m128i rgbaIn[REGISTERS_CNT];
|
|
|
|
// handle borders
|
|
int leftBorder = column < HALF_KERNEL;
|
|
int rightBorder = column > width - HALF_KERNEL;
|
|
uint32_t _rgbaIn[KERNEL_SIZE + 1] __attribute__((aligned(16)));
|
|
int i = 0;
|
|
if (leftBorder) {
|
|
// for kernel size 7x7 and column == 0, we have:
|
|
// x x x P0 P1 P2 P3
|
|
// first loop mirrors P{0..3} to fill x's,
|
|
// second one loads P{0..3}
|
|
for (; i < HALF_KERNEL - column; i++)
|
|
_rgbaIn[i] = *(src + (HALF_KERNEL - i));
|
|
for (; i < KERNEL_SIZE; i++)
|
|
_rgbaIn[i] = *(src - (HALF_KERNEL - i));
|
|
|
|
for (int k = 0; k < REGISTERS_CNT; k++)
|
|
rgbaIn[k] = _mm_load_si128((__m128i*)(_rgbaIn + 4*k));
|
|
} else if (rightBorder) {
|
|
for (; i < width - column; i++)
|
|
_rgbaIn[i] = *(src + i);
|
|
for (int k = 0; i < KERNEL_SIZE; i++, k++)
|
|
_rgbaIn[i] = *(src - k);
|
|
|
|
for (int k = 0; k < REGISTERS_CNT; k++)
|
|
rgbaIn[k] = _mm_load_si128((__m128i*)(_rgbaIn + 4*k));
|
|
} else {
|
|
for (int k = 0; k < REGISTERS_CNT; k++) {
|
|
if ((uintptr_t) (((__m128i*) src + 4*k - HALF_KERNEL) + 1)
|
|
> (uintptr_t) (o_src + (height * width)))
|
|
break;
|
|
rgbaIn[k] = _mm_loadu_si128((__m128i*)(src + 4*k - HALF_KERNEL));
|
|
}
|
|
}
|
|
|
|
__m128i zero = _mm_setzero_si128();
|
|
__m128i acc = _mm_setzero_si128();
|
|
|
|
acc = _mm_add_epi16(acc, _mm_unpacklo_epi8(rgbaIn[0], zero));
|
|
acc = _mm_add_epi16(acc, _mm_unpackhi_epi8(rgbaIn[0], zero));
|
|
acc = _mm_add_epi16(acc, _mm_unpacklo_epi8(rgbaIn[1], zero));
|
|
|
|
// kernel size equals to 7, but we can only load multiples of 4 pixels
|
|
// we have to set 8th pixel to zero
|
|
acc = _mm_add_epi16(acc, _mm_andnot_si128(_mm_set_epi32(0xFFFFFFFF, 0xFFFFFFFF, 0, 0),
|
|
_mm_unpackhi_epi8(rgbaIn[1], zero)));
|
|
acc = _mm_add_epi32(_mm_unpacklo_epi16(acc, zero),
|
|
_mm_unpackhi_epi16(acc, zero));
|
|
|
|
// multiplication is significantly faster than division
|
|
acc = _mm_cvtps_epi32(_mm_mul_ps(_mm_cvtepi32_ps(acc),
|
|
_mm_set1_ps(1.0/KERNEL_SIZE)));
|
|
|
|
*(dst + height * column + row) =
|
|
_mm_cvtsi128_si32(_mm_packus_epi16(_mm_packs_epi32(acc, zero), zero));
|
|
}
|
|
}
|
|
}
|
|
#endif
|