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qimagescale_neon.cpp
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1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3// Qt-Security score:significant reason:default
4
5#include "qimagescale_p.h"
6#include "qimage.h"
7#include <private/qsimd_p.h>
8
9#if defined(__ARM_NEON__)
10
11QT_BEGIN_NAMESPACE
12
13using namespace QImageScale;
14
15inline static uint32x4_t qt_qimageScaleAARGBA_helper(const unsigned int *pix, int xyap, int Cxy, int step)
16{
17 uint32x2_t vpix32 = vmov_n_u32(*pix);
18 uint16x4_t vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
19 uint32x4_t vx = vmull_n_u16(vpix16, xyap);
20 int i;
21 for (i = (1 << 14) - xyap; i > Cxy; i -= Cxy) {
22 pix += step;
23 vpix32 = vmov_n_u32(*pix);
24 vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
25 vx = vaddq_u32(vx, vmull_n_u16(vpix16, Cxy));
26 }
27 pix += step;
28 vpix32 = vmov_n_u32(*pix);
29 vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
30 vx = vaddq_u32(vx, vmull_n_u16(vpix16, i));
31 return vx;
32}
33
34template<bool RGB>
35void qt_qimageScaleAARGBA_up_x_down_y_neon(QImageScaleInfo *isi, unsigned int *dest,
36 int dw, int dh, int dow, int sow)
37{
38 const unsigned int **ypoints = isi->ypoints;
39 int *xpoints = isi->xpoints;
40 int *xapoints = isi->xapoints;
41 int *yapoints = isi->yapoints;
42
43 /* go through every scanline in the output buffer */
44 auto scaleSection = [&] (int yStart, int yEnd) {
45 for (int y = yStart; y < yEnd; ++y) {
46 int Cy = yapoints[y] >> 16;
47 int yap = yapoints[y] & 0xffff;
48
49 unsigned int *dptr = dest + (y * dow);
50 for (int x = 0; x < dw; x++) {
51 const unsigned int *sptr = ypoints[y] + xpoints[x];
52 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, yap, Cy, sow);
53
54 int xap = xapoints[x];
55 if (xap > 0) {
56 uint32x4_t vr = qt_qimageScaleAARGBA_helper(sptr + 1, yap, Cy, sow);
57
58 vx = vmulq_n_u32(vx, 256 - xap);
59 vr = vmulq_n_u32(vr, xap);
60 vx = vaddq_u32(vx, vr);
61 vx = vshrq_n_u32(vx, 8);
62 }
63 vx = vshrq_n_u32(vx, 14);
64 const uint16x4_t vx16 = vmovn_u32(vx);
65 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
66 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
67 if (RGB)
68 *dptr |= 0xff000000;
69 dptr++;
70 }
71 }
72 };
73 multithread_pixels_function(isi, dh, scaleSection);
74}
75
76template<bool RGB>
77void qt_qimageScaleAARGBA_down_x_up_y_neon(QImageScaleInfo *isi, unsigned int *dest,
78 int dw, int dh, int dow, int sow)
79{
80 const unsigned int **ypoints = isi->ypoints;
81 int *xpoints = isi->xpoints;
82 int *xapoints = isi->xapoints;
83 int *yapoints = isi->yapoints;
84
85 /* go through every scanline in the output buffer */
86 auto scaleSection = [&] (int yStart, int yEnd) {
87 for (int y = yStart; y < yEnd; ++y) {
88 unsigned int *dptr = dest + (y * dow);
89 for (int x = 0; x < dw; x++) {
90 int Cx = xapoints[x] >> 16;
91 int xap = xapoints[x] & 0xffff;
92
93 const unsigned int *sptr = ypoints[y] + xpoints[x];
94 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
95
96 int yap = yapoints[y];
97 if (yap > 0) {
98 uint32x4_t vr = qt_qimageScaleAARGBA_helper(sptr + sow, xap, Cx, 1);
99
100 vx = vmulq_n_u32(vx, 256 - yap);
101 vr = vmulq_n_u32(vr, yap);
102 vx = vaddq_u32(vx, vr);
103 vx = vshrq_n_u32(vx, 8);
104 }
105 vx = vshrq_n_u32(vx, 14);
106 const uint16x4_t vx16 = vmovn_u32(vx);
107 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
108 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
109 if (RGB)
110 *dptr |= 0xff000000;
111 dptr++;
112 }
113 }
114 };
115 multithread_pixels_function(isi, dh, scaleSection);
116}
117
118template<bool RGB>
119void qt_qimageScaleAARGBA_down_xy_neon(QImageScaleInfo *isi, unsigned int *dest,
120 int dw, int dh, int dow, int sow)
121{
122 const unsigned int **ypoints = isi->ypoints;
123 int *xpoints = isi->xpoints;
124 int *xapoints = isi->xapoints;
125 int *yapoints = isi->yapoints;
126
127 auto scaleSection = [&] (int yStart, int yEnd) {
128 for (int y = yStart; y < yEnd; ++y) {
129 int Cy = yapoints[y] >> 16;
130 int yap = yapoints[y] & 0xffff;
131
132 unsigned int *dptr = dest + (y * dow);
133 for (int x = 0; x < dw; x++) {
134 const int Cx = xapoints[x] >> 16;
135 const int xap = xapoints[x] & 0xffff;
136
137 const unsigned int *sptr = ypoints[y] + xpoints[x];
138 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
139 vx = vshrq_n_u32(vx, 4);
140 uint32x4_t vr = vmulq_n_u32(vx, yap);
141
142 int j;
143 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {
144 sptr += sow;
145 vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
146 vx = vshrq_n_u32(vx, 4);
147 vx = vmulq_n_u32(vx, Cy);
148 vr = vaddq_u32(vr, vx);
149 }
150 sptr += sow;
151 vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
152 vx = vshrq_n_u32(vx, 4);
153 vx = vmulq_n_u32(vx, j);
154 vr = vaddq_u32(vr, vx);
155
156 vx = vshrq_n_u32(vr, 24);
157 const uint16x4_t vx16 = vmovn_u32(vx);
158 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
159 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
160 if (RGB)
161 *dptr |= 0xff000000;
162 dptr++;
163 }
164 }
165 };
166 multithread_pixels_function(isi, dh, scaleSection);
167}
168
169template void qt_qimageScaleAARGBA_up_x_down_y_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
170 int dw, int dh, int dow, int sow);
171
172template void qt_qimageScaleAARGBA_up_x_down_y_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
173 int dw, int dh, int dow, int sow);
174
175template void qt_qimageScaleAARGBA_down_x_up_y_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
176 int dw, int dh, int dow, int sow);
177
178template void qt_qimageScaleAARGBA_down_x_up_y_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
179 int dw, int dh, int dow, int sow);
180
181template void qt_qimageScaleAARGBA_down_xy_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
182 int dw, int dh, int dow, int sow);
183
184template void qt_qimageScaleAARGBA_down_xy_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
185 int dw, int dh, int dow, int sow);
186
187QT_END_NAMESPACE
188
189#endif