Qt
Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
Loading...
Searching...
No Matches
qimagescale_neon.cpp
Go to the documentation of this file.
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
4#include "qimagescale_p.h"
5#include "qimage.h"
6#include <private/qsimd_p.h>
7
8#if defined(__ARM_NEON__)
9
10QT_BEGIN_NAMESPACE
11
12using namespace QImageScale;
13
14inline static uint32x4_t qt_qimageScaleAARGBA_helper(const unsigned int *pix, int xyap, int Cxy, int step)
15{
16 uint32x2_t vpix32 = vmov_n_u32(*pix);
17 uint16x4_t vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
18 uint32x4_t vx = vmull_n_u16(vpix16, xyap);
19 int i;
20 for (i = (1 << 14) - xyap; i > Cxy; i -= Cxy) {
21 pix += step;
22 vpix32 = vmov_n_u32(*pix);
23 vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
24 vx = vaddq_u32(vx, vmull_n_u16(vpix16, Cxy));
25 }
26 pix += step;
27 vpix32 = vmov_n_u32(*pix);
28 vpix16 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(vpix32)));
29 vx = vaddq_u32(vx, vmull_n_u16(vpix16, i));
30 return vx;
31}
32
33template<bool RGB>
34void qt_qimageScaleAARGBA_up_x_down_y_neon(QImageScaleInfo *isi, unsigned int *dest,
35 int dw, int dh, int dow, int sow)
36{
37 const unsigned int **ypoints = isi->ypoints;
38 int *xpoints = isi->xpoints;
39 int *xapoints = isi->xapoints;
40 int *yapoints = isi->yapoints;
41
42 /* go through every scanline in the output buffer */
43 auto scaleSection = [&] (int yStart, int yEnd) {
44 for (int y = yStart; y < yEnd; ++y) {
45 int Cy = yapoints[y] >> 16;
46 int yap = yapoints[y] & 0xffff;
47
48 unsigned int *dptr = dest + (y * dow);
49 for (int x = 0; x < dw; x++) {
50 const unsigned int *sptr = ypoints[y] + xpoints[x];
51 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, yap, Cy, sow);
52
53 int xap = xapoints[x];
54 if (xap > 0) {
55 uint32x4_t vr = qt_qimageScaleAARGBA_helper(sptr + 1, yap, Cy, sow);
56
57 vx = vmulq_n_u32(vx, 256 - xap);
58 vr = vmulq_n_u32(vr, xap);
59 vx = vaddq_u32(vx, vr);
60 vx = vshrq_n_u32(vx, 8);
61 }
62 vx = vshrq_n_u32(vx, 14);
63 const uint16x4_t vx16 = vmovn_u32(vx);
64 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
65 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
66 if (RGB)
67 *dptr |= 0xff000000;
68 dptr++;
69 }
70 }
71 };
72 multithread_pixels_function(isi, dh, scaleSection);
73}
74
75template<bool RGB>
76void qt_qimageScaleAARGBA_down_x_up_y_neon(QImageScaleInfo *isi, unsigned int *dest,
77 int dw, int dh, int dow, int sow)
78{
79 const unsigned int **ypoints = isi->ypoints;
80 int *xpoints = isi->xpoints;
81 int *xapoints = isi->xapoints;
82 int *yapoints = isi->yapoints;
83
84 /* go through every scanline in the output buffer */
85 auto scaleSection = [&] (int yStart, int yEnd) {
86 for (int y = yStart; y < yEnd; ++y) {
87 unsigned int *dptr = dest + (y * dow);
88 for (int x = 0; x < dw; x++) {
89 int Cx = xapoints[x] >> 16;
90 int xap = xapoints[x] & 0xffff;
91
92 const unsigned int *sptr = ypoints[y] + xpoints[x];
93 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
94
95 int yap = yapoints[y];
96 if (yap > 0) {
97 uint32x4_t vr = qt_qimageScaleAARGBA_helper(sptr + sow, xap, Cx, 1);
98
99 vx = vmulq_n_u32(vx, 256 - yap);
100 vr = vmulq_n_u32(vr, yap);
101 vx = vaddq_u32(vx, vr);
102 vx = vshrq_n_u32(vx, 8);
103 }
104 vx = vshrq_n_u32(vx, 14);
105 const uint16x4_t vx16 = vmovn_u32(vx);
106 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
107 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
108 if (RGB)
109 *dptr |= 0xff000000;
110 dptr++;
111 }
112 }
113 };
114 multithread_pixels_function(isi, dh, scaleSection);
115}
116
117template<bool RGB>
118void qt_qimageScaleAARGBA_down_xy_neon(QImageScaleInfo *isi, unsigned int *dest,
119 int dw, int dh, int dow, int sow)
120{
121 const unsigned int **ypoints = isi->ypoints;
122 int *xpoints = isi->xpoints;
123 int *xapoints = isi->xapoints;
124 int *yapoints = isi->yapoints;
125
126 auto scaleSection = [&] (int yStart, int yEnd) {
127 for (int y = yStart; y < yEnd; ++y) {
128 int Cy = yapoints[y] >> 16;
129 int yap = yapoints[y] & 0xffff;
130
131 unsigned int *dptr = dest + (y * dow);
132 for (int x = 0; x < dw; x++) {
133 const int Cx = xapoints[x] >> 16;
134 const int xap = xapoints[x] & 0xffff;
135
136 const unsigned int *sptr = ypoints[y] + xpoints[x];
137 uint32x4_t vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
138 vx = vshrq_n_u32(vx, 4);
139 uint32x4_t vr = vmulq_n_u32(vx, yap);
140
141 int j;
142 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {
143 sptr += sow;
144 vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
145 vx = vshrq_n_u32(vx, 4);
146 vx = vmulq_n_u32(vx, Cy);
147 vr = vaddq_u32(vr, vx);
148 }
149 sptr += sow;
150 vx = qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1);
151 vx = vshrq_n_u32(vx, 4);
152 vx = vmulq_n_u32(vx, j);
153 vr = vaddq_u32(vr, vx);
154
155 vx = vshrq_n_u32(vr, 24);
156 const uint16x4_t vx16 = vmovn_u32(vx);
157 const uint8x8_t vx8 = vmovn_u16(vcombine_u16(vx16, vx16));
158 *dptr = vget_lane_u32(vreinterpret_u32_u8(vx8), 0);
159 if (RGB)
160 *dptr |= 0xff000000;
161 dptr++;
162 }
163 }
164 };
165 multithread_pixels_function(isi, dh, scaleSection);
166}
167
168template void qt_qimageScaleAARGBA_up_x_down_y_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
169 int dw, int dh, int dow, int sow);
170
171template void qt_qimageScaleAARGBA_up_x_down_y_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
172 int dw, int dh, int dow, int sow);
173
174template void qt_qimageScaleAARGBA_down_x_up_y_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
175 int dw, int dh, int dow, int sow);
176
177template void qt_qimageScaleAARGBA_down_x_up_y_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
178 int dw, int dh, int dow, int sow);
179
180template void qt_qimageScaleAARGBA_down_xy_neon<false>(QImageScaleInfo *isi, unsigned int *dest,
181 int dw, int dh, int dow, int sow);
182
183template void qt_qimageScaleAARGBA_down_xy_neon<true>(QImageScaleInfo *isi, unsigned int *dest,
184 int dw, int dh, int dow, int sow);
185
186QT_END_NAMESPACE
187
188#endif