1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (c) 2021 Samsung Electronics Co., Ltd. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
{
float _dudx = dudx, _dvdx = dvdx;
float _dxdya = dxdya, _dxdyb = dxdyb, _dudya = dudya, _dvdya = dvdya;
float _xa = xa, _xb = xb, _ua = ua, _va = va;
auto sbuf = image->data;
auto dbuf = surface->buffer;
int32_t sw = static_cast<int32_t>(image->stride);
int32_t sh = image->h;
int32_t dw = surface->stride;
int32_t x1, x2, x, y, ar, ab, iru, irv, px, ay;
int32_t vv = 0, uu = 0;
int32_t minx, maxx;
float dx, u, v, iptr;
uint32_t* buf;
SwSpan* span = nullptr; //used only when rle based.
#ifdef TEXMAP_MASKING
uint32_t* cmp;
#endif
if (!_arrange(image, region, yStart, yEnd)) return;
//Loop through all lines in the segment
uint32_t spanIdx = 0;
if (region) {
minx = region->min.x;
maxx = region->max.x;
} else {
span = image->rle->spans;
while (span->y < yStart) {
++span;
++spanIdx;
}
}
y = yStart;
while (y < yEnd) {
x1 = _xa;
x2 = _xb;
if (!region) {
minx = INT32_MAX;
maxx = INT32_MIN;
//one single row, could be consisted of multiple spans.
while (span->y == y && spanIdx < image->rle->size) {
if (minx > span->x) minx = span->x;
if (maxx < span->x + span->len) maxx = span->x + span->len;
++span;
++spanIdx;
}
}
if (x1 < minx) x1 = minx;
if (x2 > maxx) x2 = maxx;
//Anti-Aliasing frames
ay = y - aaSpans->yStart;
if (aaSpans->lines[ay].x[0] > x1) aaSpans->lines[ay].x[0] = x1;
if (aaSpans->lines[ay].x[1] < x2) aaSpans->lines[ay].x[1] = x2;
//Range exception
if ((x2 - x1) < 1 || (x1 >= maxx) || (x2 <= minx)) goto next;
//Perform subtexel pre-stepping on UV
dx = 1 - (_xa - x1);
u = _ua + dx * _dudx;
v = _va + dx * _dvdx;
buf = dbuf + ((y * dw) + x1);
x = x1;
#ifdef TEXMAP_MASKING
cmp = &surface->compositor->image.data[y * surface->compositor->image.stride + x1];
#endif
//Draw horizontal line
while (x++ < x2) {
uu = (int) u;
vv = (int) v;
ar = (int)(255 * (1 - modff(u, &iptr)));
ab = (int)(255 * (1 - modff(v, &iptr)));
iru = uu + 1;
irv = vv + 1;
px = *(sbuf + (vv * sw) + uu);
/* horizontal interpolate */
if (iru < sw) {
/* right pixel */
int px2 = *(sbuf + (vv * sw) + iru);
px = INTERPOLATE(ar, px, px2);
}
/* vertical interpolate */
if (irv < sh) {
/* bottom pixel */
int px2 = *(sbuf + (irv * sw) + uu);
/* horizontal interpolate */
if (iru < sw) {
/* bottom right pixel */
int px3 = *(sbuf + (irv * sw) + iru);
px2 = INTERPOLATE(ar, px2, px3);
}
px = INTERPOLATE(ab, px, px2);
}
#if defined(TEXMAP_MASKING) && defined(TEXMAP_TRANSLUCENT)
auto src = ALPHA_BLEND(px, _multiplyAlpha(opacity, blendMethod(*cmp)));
#elif defined(TEXMAP_MASKING)
auto src = ALPHA_BLEND(px, blendMethod(*cmp));
#elif defined(TEXMAP_TRANSLUCENT)
auto src = ALPHA_BLEND(px, opacity);
#else
auto src = px;
#endif
*buf = src + ALPHA_BLEND(*buf, _ialpha(src));
++buf;
#ifdef TEXMAP_MASKING
++cmp;
#endif
//Step UV horizontally
u += _dudx;
v += _dvdx;
//range over?
if ((uint32_t)v >= image->h) break;
}
next:
//Step along both edges
_xa += _dxdya;
_xb += _dxdyb;
_ua += _dudya;
_va += _dvdya;
if (!region && spanIdx >= image->rle->size) break;
++y;
}
xa = _xa;
xb = _xb;
ua = _ua;
va = _va;
}
|