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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <immintrin.h>
#include "config/aom_dsp_rtcd.h"
#include "aom_dsp/x86/masked_variance_intrin_ssse3.h"
static INLINE __m128i mm256_add_hi_lo_epi16(const __m256i val) {
return _mm_add_epi16(_mm256_castsi256_si128(val),
_mm256_extractf128_si256(val, 1));
}
static INLINE __m128i mm256_add_hi_lo_epi32(const __m256i val) {
return _mm_add_epi32(_mm256_castsi256_si128(val),
_mm256_extractf128_si256(val, 1));
}
static INLINE void variance_kernel_avx2(const __m256i src, const __m256i ref,
__m256i *const sse,
__m256i *const sum) {
const __m256i adj_sub = _mm256_set1_epi16(0xff01); // (1,-1)
// unpack into pairs of source and reference values
const __m256i src_ref0 = _mm256_unpacklo_epi8(src, ref);
const __m256i src_ref1 = _mm256_unpackhi_epi8(src, ref);
// subtract adjacent elements using src*1 + ref*-1
const __m256i diff0 = _mm256_maddubs_epi16(src_ref0, adj_sub);
const __m256i diff1 = _mm256_maddubs_epi16(src_ref1, adj_sub);
const __m256i madd0 = _mm256_madd_epi16(diff0, diff0);
const __m256i madd1 = _mm256_madd_epi16(diff1, diff1);
// add to the running totals
*sum = _mm256_add_epi16(*sum, _mm256_add_epi16(diff0, diff1));
*sse = _mm256_add_epi32(*sse, _mm256_add_epi32(madd0, madd1));
}
static INLINE int variance_final_from_32bit_sum_avx2(__m256i vsse, __m128i vsum,
unsigned int *const sse) {
// extract the low lane and add it to the high lane
const __m128i sse_reg_128 = mm256_add_hi_lo_epi32(vsse);
// unpack sse and sum registers and add
const __m128i sse_sum_lo = _mm_unpacklo_epi32(sse_reg_128, vsum);
const __m128i sse_sum_hi = _mm_unpackhi_epi32(sse_reg_128, vsum);
const __m128i sse_sum = _mm_add_epi32(sse_sum_lo, sse_sum_hi);
// perform the final summation and extract the results
const __m128i res = _mm_add_epi32(sse_sum, _mm_srli_si128(sse_sum, 8));
*((int *)sse) = _mm_cvtsi128_si32(res);
return _mm_extract_epi32(res, 1);
}
// handle pixels (<= 512)
static INLINE int variance_final_512_avx2(__m256i vsse, __m256i vsum,
unsigned int *const sse) {
// extract the low lane and add it to the high lane
const __m128i vsum_128 = mm256_add_hi_lo_epi16(vsum);
const __m128i vsum_64 = _mm_add_epi16(vsum_128, _mm_srli_si128(vsum_128, 8));
const __m128i sum_int32 = _mm_cvtepi16_epi32(vsum_64);
return variance_final_from_32bit_sum_avx2(vsse, sum_int32, sse);
}
// handle 1024 pixels (32x32, 16x64, 64x16)
static INLINE int variance_final_1024_avx2(__m256i vsse, __m256i vsum,
unsigned int *const sse) {
// extract the low lane and add it to the high lane
const __m128i vsum_128 = mm256_add_hi_lo_epi16(vsum);
const __m128i vsum_64 =
_mm_add_epi32(_mm_cvtepi16_epi32(vsum_128),
_mm_cvtepi16_epi32(_mm_srli_si128(vsum_128, 8)));
return variance_final_from_32bit_sum_avx2(vsse, vsum_64, sse);
}
static INLINE __m256i sum_to_32bit_avx2(const __m256i sum) {
const __m256i sum_lo = _mm256_cvtepi16_epi32(_mm256_castsi256_si128(sum));
const __m256i sum_hi =
_mm256_cvtepi16_epi32(_mm256_extractf128_si256(sum, 1));
return _mm256_add_epi32(sum_lo, sum_hi);
}
// handle 2048 pixels (32x64, 64x32)
static INLINE int variance_final_2048_avx2(__m256i vsse, __m256i vsum,
unsigned int *const sse) {
vsum = sum_to_32bit_avx2(vsum);
const __m128i vsum_128 = mm256_add_hi_lo_epi32(vsum);
return variance_final_from_32bit_sum_avx2(vsse, vsum_128, sse);
}
static INLINE void variance16_kernel_avx2(
const uint8_t *const src, const int src_stride, const uint8_t *const ref,
const int ref_stride, __m256i *const sse, __m256i *const sum) {
const __m128i s0 = _mm_loadu_si128((__m128i const *)(src + 0 * src_stride));
const __m128i s1 = _mm_loadu_si128((__m128i const *)(src + 1 * src_stride));
const __m128i r0 = _mm_loadu_si128((__m128i const *)(ref + 0 * ref_stride));
const __m128i r1 = _mm_loadu_si128((__m128i const *)(ref + 1 * ref_stride));
const __m256i s = _mm256_inserti128_si256(_mm256_castsi128_si256(s0), s1, 1);
const __m256i r = _mm256_inserti128_si256(_mm256_castsi128_si256(r0), r1, 1);
variance_kernel_avx2(s, r, sse, sum);
}
static INLINE void variance32_kernel_avx2(const uint8_t *const src,
const uint8_t *const ref,
__m256i *const sse,
__m256i *const sum) {
const __m256i s = _mm256_loadu_si256((__m256i const *)(src));
const __m256i r = _mm256_loadu_si256((__m256i const *)(ref));
variance_kernel_avx2(s, r, sse, sum);
}
static INLINE void variance16_avx2(const uint8_t *src, const int src_stride,
const uint8_t *ref, const int ref_stride,
const int h, __m256i *const vsse,
__m256i *const vsum) {
*vsum = _mm256_setzero_si256();
for (int i = 0; i < h; i += 2) {
variance16_kernel_avx2(src, src_stride, ref, ref_stride, vsse, vsum);
src += 2 * src_stride;
ref += 2 * ref_stride;
}
}
static INLINE void variance32_avx2(const uint8_t *src, const int src_stride,
const uint8_t *ref, const int ref_stride,
const int h, __m256i *const vsse,
__m256i *const vsum) {
*vsum = _mm256_setzero_si256();
for (int i = 0; i < h; i++) {
variance32_kernel_avx2(src, ref, vsse, vsum);
src += src_stride;
ref += ref_stride;
}
}
static INLINE void variance64_avx2(const uint8_t *src, const int src_stride,
const uint8_t *ref, const int ref_stride,
const int h, __m256i *const vsse,
__m256i *const vsum) {
*vsum = _mm256_setzero_si256();
for (int i = 0; i < h; i++) {
variance32_kernel_avx2(src + 0, ref + 0, vsse, vsum);
variance32_kernel_avx2(src + 32, ref + 32, vsse, vsum);
src += src_stride;
ref += ref_stride;
}
}
static INLINE void variance128_avx2(const uint8_t *src, const int src_stride,
const uint8_t *ref, const int ref_stride,
const int h, __m256i *const vsse,
__m256i *const vsum) {
*vsum = _mm256_setzero_si256();
for (int i = 0; i < h; i++) {
variance32_kernel_avx2(src + 0, ref + 0, vsse, vsum);
variance32_kernel_avx2(src + 32, ref + 32, vsse, vsum);
variance32_kernel_avx2(src + 64, ref + 64, vsse, vsum);
variance32_kernel_avx2(src + 96, ref + 96, vsse, vsum);
src += src_stride;
ref += ref_stride;
}
}
#define AOM_VAR_NO_LOOP_AVX2(bw, bh, bits, max_pixel) \
unsigned int aom_variance##bw##x##bh##_avx2( \
const uint8_t *src, int src_stride, const uint8_t *ref, int ref_stride, \
unsigned int *sse) { \
__m256i vsse = _mm256_setzero_si256(); \
__m256i vsum; \
variance##bw##_avx2(src, src_stride, ref, ref_stride, bh, &vsse, &vsum); \
const int sum = variance_final_##max_pixel##_avx2(vsse, vsum, sse); \
return *sse - (uint32_t)(((int64_t)sum * sum) >> bits); \
}
AOM_VAR_NO_LOOP_AVX2(16, 4, 6, 512);
AOM_VAR_NO_LOOP_AVX2(16, 8, 7, 512);
AOM_VAR_NO_LOOP_AVX2(16, 16, 8, 512);
AOM_VAR_NO_LOOP_AVX2(16, 32, 9, 512);
AOM_VAR_NO_LOOP_AVX2(16, 64, 10, 1024);
AOM_VAR_NO_LOOP_AVX2(32, 8, 8, 512);
AOM_VAR_NO_LOOP_AVX2(32, 16, 9, 512);
AOM_VAR_NO_LOOP_AVX2(32, 32, 10, 1024);
AOM_VAR_NO_LOOP_AVX2(32, 64, 11, 2048);
AOM_VAR_NO_LOOP_AVX2(64, 16, 10, 1024);
AOM_VAR_NO_LOOP_AVX2(64, 32, 11, 2048);
#define AOM_VAR_LOOP_AVX2(bw, bh, bits, uh) \
unsigned int aom_variance##bw##x##bh##_avx2( \
const uint8_t *src, int src_stride, const uint8_t *ref, int ref_stride, \
unsigned int *sse) { \
__m256i vsse = _mm256_setzero_si256(); \
__m256i vsum = _mm256_setzero_si256(); \
for (int i = 0; i < (bh / uh); i++) { \
__m256i vsum16; \
variance##bw##_avx2(src, src_stride, ref, ref_stride, uh, &vsse, \
&vsum16); \
vsum = _mm256_add_epi32(vsum, sum_to_32bit_avx2(vsum16)); \
src += uh * src_stride; \
ref += uh * ref_stride; \
} \
const __m128i vsum_128 = mm256_add_hi_lo_epi32(vsum); \
const int sum = variance_final_from_32bit_sum_avx2(vsse, vsum_128, sse); \
return *sse - (unsigned int)(((int64_t)sum * sum) >> bits); \
}
AOM_VAR_LOOP_AVX2(64, 64, 12, 32); // 64x32 * ( 64/32)
AOM_VAR_LOOP_AVX2(64, 128, 13, 32); // 64x32 * (128/32)
AOM_VAR_LOOP_AVX2(128, 64, 13, 16); // 128x16 * ( 64/16)
AOM_VAR_LOOP_AVX2(128, 128, 14, 16); // 128x16 * (128/16)
unsigned int aom_mse16x16_avx2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
aom_variance16x16_avx2(src, src_stride, ref, ref_stride, sse);
return *sse;
}
unsigned int aom_sub_pixel_variance32xh_avx2(const uint8_t *src, int src_stride,
int x_offset, int y_offset,
const uint8_t *dst, int dst_stride,
int height, unsigned int *sse);
unsigned int aom_sub_pixel_avg_variance32xh_avx2(
const uint8_t *src, int src_stride, int x_offset, int y_offset,
const uint8_t *dst, int dst_stride, const uint8_t *sec, int sec_stride,
int height, unsigned int *sseptr);
#define AOM_SUB_PIXEL_VAR_AVX2(w, h, wf, wlog2, hlog2) \
unsigned int aom_sub_pixel_variance##w##x##h##_avx2( \
const uint8_t *src, int src_stride, int x_offset, int y_offset, \
const uint8_t *dst, int dst_stride, unsigned int *sse_ptr) { \
/*Avoid overflow in helper by capping height.*/ \
const int hf = AOMMIN(h, 64); \
unsigned int sse = 0; \
int se = 0; \
for (int i = 0; i < (w / wf); ++i) { \
const uint8_t *src_ptr = src; \
const uint8_t *dst_ptr = dst; \
for (int j = 0; j < (h / hf); ++j) { \
unsigned int sse2; \
const int se2 = aom_sub_pixel_variance##wf##xh_avx2( \
src_ptr, src_stride, x_offset, y_offset, dst_ptr, dst_stride, hf, \
&sse2); \
dst_ptr += hf * dst_stride; \
src_ptr += hf * src_stride; \
se += se2; \
sse += sse2; \
} \
src += wf; \
dst += wf; \
} \
*sse_ptr = sse; \
return sse - (unsigned int)(((int64_t)se * se) >> (wlog2 + hlog2)); \
}
AOM_SUB_PIXEL_VAR_AVX2(128, 128, 32, 7, 7);
AOM_SUB_PIXEL_VAR_AVX2(128, 64, 32, 7, 6);
AOM_SUB_PIXEL_VAR_AVX2(64, 128, 32, 6, 7);
AOM_SUB_PIXEL_VAR_AVX2(64, 64, 32, 6, 6);
AOM_SUB_PIXEL_VAR_AVX2(64, 32, 32, 6, 5);
AOM_SUB_PIXEL_VAR_AVX2(32, 64, 32, 5, 6);
AOM_SUB_PIXEL_VAR_AVX2(32, 32, 32, 5, 5);
AOM_SUB_PIXEL_VAR_AVX2(32, 16, 32, 5, 4);
#define AOM_SUB_PIXEL_AVG_VAR_AVX2(w, h, wf, wlog2, hlog2) \
unsigned int aom_sub_pixel_avg_variance##w##x##h##_avx2( \
const uint8_t *src, int src_stride, int x_offset, int y_offset, \
const uint8_t *dst, int dst_stride, unsigned int *sse_ptr, \
const uint8_t *sec) { \
/*Avoid overflow in helper by capping height.*/ \
const int hf = AOMMIN(h, 64); \
unsigned int sse = 0; \
int se = 0; \
for (int i = 0; i < (w / wf); ++i) { \
const uint8_t *src_ptr = src; \
const uint8_t *dst_ptr = dst; \
const uint8_t *sec_ptr = sec; \
for (int j = 0; j < (h / hf); ++j) { \
unsigned int sse2; \
const int se2 = aom_sub_pixel_avg_variance##wf##xh_avx2( \
src_ptr, src_stride, x_offset, y_offset, dst_ptr, dst_stride, \
sec_ptr, w, hf, &sse2); \
dst_ptr += hf * dst_stride; \
src_ptr += hf * src_stride; \
sec_ptr += hf * w; \
se += se2; \
sse += sse2; \
} \
src += wf; \
dst += wf; \
sec += wf; \
} \
*sse_ptr = sse; \
return sse - (unsigned int)(((int64_t)se * se) >> (wlog2 + hlog2)); \
}
AOM_SUB_PIXEL_AVG_VAR_AVX2(128, 128, 32, 7, 7);
AOM_SUB_PIXEL_AVG_VAR_AVX2(128, 64, 32, 7, 6);
AOM_SUB_PIXEL_AVG_VAR_AVX2(64, 128, 32, 6, 7);
AOM_SUB_PIXEL_AVG_VAR_AVX2(64, 64, 32, 6, 6);
AOM_SUB_PIXEL_AVG_VAR_AVX2(64, 32, 32, 6, 5);
AOM_SUB_PIXEL_AVG_VAR_AVX2(32, 64, 32, 5, 6);
AOM_SUB_PIXEL_AVG_VAR_AVX2(32, 32, 32, 5, 5);
AOM_SUB_PIXEL_AVG_VAR_AVX2(32, 16, 32, 5, 4);
static INLINE __m256i mm256_loadu2(const uint8_t *p0, const uint8_t *p1) {
const __m256i d =
_mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)p1));
return _mm256_insertf128_si256(d, _mm_loadu_si128((const __m128i *)p0), 1);
}
static INLINE __m256i mm256_loadu2_16(const uint16_t *p0, const uint16_t *p1) {
const __m256i d =
_mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)p1));
return _mm256_insertf128_si256(d, _mm_loadu_si128((const __m128i *)p0), 1);
}
static INLINE void comp_mask_pred_line_avx2(const __m256i s0, const __m256i s1,
const __m256i a,
uint8_t *comp_pred) {
const __m256i alpha_max = _mm256_set1_epi8(AOM_BLEND_A64_MAX_ALPHA);
const int16_t round_bits = 15 - AOM_BLEND_A64_ROUND_BITS;
const __m256i round_offset = _mm256_set1_epi16(1 << (round_bits));
const __m256i ma = _mm256_sub_epi8(alpha_max, a);
const __m256i ssAL = _mm256_unpacklo_epi8(s0, s1);
const __m256i aaAL = _mm256_unpacklo_epi8(a, ma);
const __m256i ssAH = _mm256_unpackhi_epi8(s0, s1);
const __m256i aaAH = _mm256_unpackhi_epi8(a, ma);
const __m256i blendAL = _mm256_maddubs_epi16(ssAL, aaAL);
const __m256i blendAH = _mm256_maddubs_epi16(ssAH, aaAH);
const __m256i roundAL = _mm256_mulhrs_epi16(blendAL, round_offset);
const __m256i roundAH = _mm256_mulhrs_epi16(blendAH, round_offset);
const __m256i roundA = _mm256_packus_epi16(roundAL, roundAH);
_mm256_storeu_si256((__m256i *)(comp_pred), roundA);
}
void aom_comp_mask_pred_avx2(uint8_t *comp_pred, const uint8_t *pred, int width,
int height, const uint8_t *ref, int ref_stride,
const uint8_t *mask, int mask_stride,
int invert_mask) {
int i = 0;
const uint8_t *src0 = invert_mask ? pred : ref;
const uint8_t *src1 = invert_mask ? ref : pred;
const int stride0 = invert_mask ? width : ref_stride;
const int stride1 = invert_mask ? ref_stride : width;
if (width == 8) {
comp_mask_pred_8_ssse3(comp_pred, height, src0, stride0, src1, stride1,
mask, mask_stride);
} else if (width == 16) {
do {
const __m256i sA0 = mm256_loadu2(src0 + stride0, src0);
const __m256i sA1 = mm256_loadu2(src1 + stride1, src1);
const __m256i aA = mm256_loadu2(mask + mask_stride, mask);
src0 += (stride0 << 1);
src1 += (stride1 << 1);
mask += (mask_stride << 1);
const __m256i sB0 = mm256_loadu2(src0 + stride0, src0);
const __m256i sB1 = mm256_loadu2(src1 + stride1, src1);
const __m256i aB = mm256_loadu2(mask + mask_stride, mask);
src0 += (stride0 << 1);
src1 += (stride1 << 1);
mask += (mask_stride << 1);
// comp_pred's stride == width == 16
comp_mask_pred_line_avx2(sA0, sA1, aA, comp_pred);
comp_mask_pred_line_avx2(sB0, sB1, aB, comp_pred + 32);
comp_pred += (16 << 2);
i += 4;
} while (i < height);
} else { // for width == 32
do {
const __m256i sA0 = _mm256_lddqu_si256((const __m256i *)(src0));
const __m256i sA1 = _mm256_lddqu_si256((const __m256i *)(src1));
const __m256i aA = _mm256_lddqu_si256((const __m256i *)(mask));
const __m256i sB0 = _mm256_lddqu_si256((const __m256i *)(src0 + stride0));
const __m256i sB1 = _mm256_lddqu_si256((const __m256i *)(src1 + stride1));
const __m256i aB =
_mm256_lddqu_si256((const __m256i *)(mask + mask_stride));
comp_mask_pred_line_avx2(sA0, sA1, aA, comp_pred);
comp_mask_pred_line_avx2(sB0, sB1, aB, comp_pred + 32);
comp_pred += (32 << 1);
src0 += (stride0 << 1);
src1 += (stride1 << 1);
mask += (mask_stride << 1);
i += 2;
} while (i < height);
}
}
static INLINE __m256i highbd_comp_mask_pred_line_avx2(const __m256i s0,
const __m256i s1,
const __m256i a) {
const __m256i alpha_max = _mm256_set1_epi16((1 << AOM_BLEND_A64_ROUND_BITS));
const __m256i round_const =
_mm256_set1_epi32((1 << AOM_BLEND_A64_ROUND_BITS) >> 1);
const __m256i a_inv = _mm256_sub_epi16(alpha_max, a);
const __m256i s_lo = _mm256_unpacklo_epi16(s0, s1);
const __m256i a_lo = _mm256_unpacklo_epi16(a, a_inv);
const __m256i pred_lo = _mm256_madd_epi16(s_lo, a_lo);
const __m256i pred_l = _mm256_srai_epi32(
_mm256_add_epi32(pred_lo, round_const), AOM_BLEND_A64_ROUND_BITS);
const __m256i s_hi = _mm256_unpackhi_epi16(s0, s1);
const __m256i a_hi = _mm256_unpackhi_epi16(a, a_inv);
const __m256i pred_hi = _mm256_madd_epi16(s_hi, a_hi);
const __m256i pred_h = _mm256_srai_epi32(
_mm256_add_epi32(pred_hi, round_const), AOM_BLEND_A64_ROUND_BITS);
const __m256i comp = _mm256_packs_epi32(pred_l, pred_h);
return comp;
}
void aom_highbd_comp_mask_pred_avx2(uint8_t *comp_pred8, const uint8_t *pred8,
int width, int height, const uint8_t *ref8,
int ref_stride, const uint8_t *mask,
int mask_stride, int invert_mask) {
int i = 0;
uint16_t *pred = CONVERT_TO_SHORTPTR(pred8);
uint16_t *ref = CONVERT_TO_SHORTPTR(ref8);
uint16_t *comp_pred = CONVERT_TO_SHORTPTR(comp_pred8);
const uint16_t *src0 = invert_mask ? pred : ref;
const uint16_t *src1 = invert_mask ? ref : pred;
const int stride0 = invert_mask ? width : ref_stride;
const int stride1 = invert_mask ? ref_stride : width;
const __m256i zero = _mm256_setzero_si256();
if (width == 8) {
do {
const __m256i s0 = mm256_loadu2_16(src0 + stride0, src0);
const __m256i s1 = mm256_loadu2_16(src1 + stride1, src1);
const __m128i m_l = _mm_loadl_epi64((const __m128i *)mask);
const __m128i m_h = _mm_loadl_epi64((const __m128i *)(mask + 8));
__m256i m = _mm256_castsi128_si256(m_l);
m = _mm256_insertf128_si256(m, m_h, 1);
const __m256i m_16 = _mm256_unpacklo_epi8(m, zero);
const __m256i comp = highbd_comp_mask_pred_line_avx2(s0, s1, m_16);
_mm_storeu_si128((__m128i *)(comp_pred), _mm256_castsi256_si128(comp));
_mm_storeu_si128((__m128i *)(comp_pred + width),
_mm256_extractf128_si256(comp, 1));
src0 += (stride0 << 1);
src1 += (stride1 << 1);
mask += (mask_stride << 1);
comp_pred += (width << 1);
i += 2;
} while (i < height);
} else if (width == 16) {
do {
const __m256i s0 = _mm256_loadu_si256((const __m256i *)(src0));
const __m256i s1 = _mm256_loadu_si256((const __m256i *)(src1));
const __m256i m_16 =
_mm256_cvtepu8_epi16(_mm_loadu_si128((const __m128i *)mask));
const __m256i comp = highbd_comp_mask_pred_line_avx2(s0, s1, m_16);
_mm256_storeu_si256((__m256i *)comp_pred, comp);
src0 += stride0;
src1 += stride1;
mask += mask_stride;
comp_pred += width;
i += 1;
} while (i < height);
} else if (width == 32) {
do {
const __m256i s0 = _mm256_loadu_si256((const __m256i *)src0);
const __m256i s2 = _mm256_loadu_si256((const __m256i *)(src0 + 16));
const __m256i s1 = _mm256_loadu_si256((const __m256i *)src1);
const __m256i s3 = _mm256_loadu_si256((const __m256i *)(src1 + 16));
const __m256i m01_16 =
_mm256_cvtepu8_epi16(_mm_loadu_si128((const __m128i *)mask));
const __m256i m23_16 =
_mm256_cvtepu8_epi16(_mm_loadu_si128((const __m128i *)(mask + 16)));
const __m256i comp = highbd_comp_mask_pred_line_avx2(s0, s1, m01_16);
const __m256i comp1 = highbd_comp_mask_pred_line_avx2(s2, s3, m23_16);
_mm256_storeu_si256((__m256i *)comp_pred, comp);
_mm256_storeu_si256((__m256i *)(comp_pred + 16), comp1);
src0 += stride0;
src1 += stride1;
mask += mask_stride;
comp_pred += width;
i += 1;
} while (i < height);
}
}