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
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
#define ONLY_INT_COMPATIBLE
#define double uint64_t
#include "libglitter_compose_double.c"
#ifdef greater_t
# define MIX(A, B) (((greater_t)(A) + (greater_t)(B)) >> 1)
#else
# define greater_t double
# define MIX(A, B) (((A) >> 1) + ((B) >> 1) + ((A) & (B) & 1))
#endif
#ifndef TEST
static void
simple(uint64_t **outputs, const uint64_t *restrict input, size_t output_rowsize, size_t output_cellsize,
size_t input_rowsize, size_t width, size_t height, const LIBGLITTER_RENDER_CONTEXT *render_ctx)
{
size_t y, x, output_y, output_i, input_blanking;
size_t cell00 = render_ctx->cells[0][0], cell01 = render_ctx->cells[0][1];
size_t cell10 = render_ctx->cells[1][0], cell11 = render_ctx->cells[1][1];
size_t cell20 = render_ctx->cells[2][0], cell21 = render_ctx->cells[2][1];
output_rowsize *= output_cellsize;
input_blanking = input_rowsize * render_ctx->heightmul - width * render_ctx->widthmul;
for (y = 0, output_y = 0; y < height; y++, output_y += output_rowsize) {
for (x = 0, output_i = output_y; x < width; x++, output_i += output_cellsize) {
outputs[0][output_i] = (uint64_t)MIX(input[cell00], input[cell01]);
outputs[1][output_i] = (uint64_t)MIX(input[cell10], input[cell11]);
outputs[2][output_i] = (uint64_t)MIX(input[cell20], input[cell21]);
input = &input[render_ctx->widthmul];
}
input = &input[input_blanking];
}
}
static void
generic(uint64_t **outputs, size_t noutputs, const uint64_t *restrict input,
size_t output_rowsize, size_t output_cellsize, size_t input_rowsize,
size_t width, size_t height, size_t widthmul, size_t heightmul,
const uint8_t *restrict cellmap, const uint8_t *restrict ncellvalues)
{
size_t y, x, iy, ix, i, output_y, output_i, input_blanking;
uint8_t channel;
greater_t *pixel;
output_rowsize *= output_cellsize;
input_blanking = input_rowsize * heightmul - width * widthmul;
pixel = alloca(noutputs * sizeof(greater_t));
for (y = 0, output_y = 0; y < height; y++, output_y += output_rowsize) {
for (x = 0, output_i = output_y; x < width; x++, output_i += output_cellsize) {
for (i = 0; i < noutputs; i++)
pixel[i] = 0;
for (iy = 0; iy < heightmul; iy++) {
for (ix = 0; ix < widthmul; ix++) {
channel = cellmap[iy * widthmul + ix];
pixel[channel] += (greater_t)input[iy * input_rowsize + ix];
}
}
for (i = 0; i < noutputs; i++)
outputs[i][output_i] = (uint64_t)(pixel[i] / (greater_t)ncellvalues[i]);
input = &input[widthmul];
}
input = &input[input_blanking];
}
}
void
libglitter_compose_uint64(uint64_t **outputs, const uint64_t *restrict input, size_t output_rowsize, size_t output_cellsize,
size_t width, size_t height, const LIBGLITTER_RENDER_CONTEXT *render_ctx)
{
if (render_ctx->render_method == RENDER_METHOD_VSTRIPS) {
vstrips(outputs, input, output_rowsize, output_cellsize, render_ctx->rowsize, width, height, render_ctx->cellmap);
} else if (render_ctx->render_method == RENDER_METHOD_HSTRIPS) {
hstrips(outputs, input, output_rowsize, output_cellsize, render_ctx->rowsize, width, height, render_ctx->cellmap);
} else if (render_ctx->render_method == RENDER_METHOD_SIMPLE) {
simple(outputs, input, output_rowsize, output_cellsize, render_ctx->rowsize, width, height, render_ctx);
} else {
generic(outputs, render_ctx->noutputs, input, output_rowsize, output_cellsize,
render_ctx->rowsize, width, height, render_ctx->widthmul, render_ctx->heightmul,
render_ctx->cellmap, render_ctx->ncellvalues);
}
}
#else
int
main(void)
{
return 0; /* TODO add test */
}
#endif
|
