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
|
/*
* Copyright 2022 Michael Drake <tlsa@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Internal core bitmap interface.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include "utils/log.h"
#include "utils/errors.h"
#include "desktop/bitmap.h"
#include "desktop/gui_internal.h"
/** The client bitmap format. */
bitmap_fmt_t bitmap_fmt;
/** The client bitmap colour channel layout. */
struct bitmap_colour_layout bitmap_layout = {
.r = 0,
.g = 1,
.b = 2,
.a = 3,
};
/**
* Get the colour layout for the given bitmap format.
*
* \param[in] fmt Pixel format to get channel layout for,
* \return channel layout structure.
*/
static struct bitmap_colour_layout bitmap__get_colour_layout(
const bitmap_fmt_t *fmt)
{
switch (fmt->layout) {
default:
/* Fall through. */
case BITMAP_LAYOUT_R8G8B8A8:
return (struct bitmap_colour_layout) {
.r = 0,
.g = 1,
.b = 2,
.a = 3,
};
case BITMAP_LAYOUT_B8G8R8A8:
return (struct bitmap_colour_layout) {
.b = 0,
.g = 1,
.r = 2,
.a = 3,
};
case BITMAP_LAYOUT_A8R8G8B8:
return (struct bitmap_colour_layout) {
.a = 0,
.r = 1,
.g = 2,
.b = 3,
};
case BITMAP_LAYOUT_A8B8G8R8:
return (struct bitmap_colour_layout) {
.a = 0,
.b = 1,
.g = 2,
.r = 3,
};
}
}
/* Exported function, documented in include/netsurf/bitmap.h */
void bitmap_set_format(const bitmap_fmt_t *bitmap_format)
{
bitmap_fmt = *bitmap_format;
bitmap_fmt.layout = bitmap_sanitise_bitmap_layout(bitmap_fmt.layout);
bitmap_layout = bitmap__get_colour_layout(&bitmap_fmt);
}
/* Exported function, documented in desktop/bitmap.h */
void bitmap_format_convert(void *bitmap,
const bitmap_fmt_t *fmt_from,
const bitmap_fmt_t *fmt_to)
{
int width = guit->bitmap->get_width(bitmap);
int height = guit->bitmap->get_height(bitmap);
uint8_t *buffer = guit->bitmap->get_buffer(bitmap);
size_t rowstride = guit->bitmap->get_rowstride(bitmap);
struct bitmap_colour_layout to = bitmap__get_colour_layout(fmt_to);
struct bitmap_colour_layout from = bitmap__get_colour_layout(fmt_from);
NSLOG(netsurf, DEEPDEBUG, "Bitmap format conversion (%u --> %u)",
fmt_from->layout, fmt_to->layout);
for (int y = 0; y < height; y++) {
uint8_t *row = buffer;
for (int x = 0; x < width; x++) {
const uint32_t px = *((uint32_t *)(void *) row);
row[to.r] = ((const uint8_t *) &px)[from.r];
row[to.g] = ((const uint8_t *) &px)[from.g];
row[to.b] = ((const uint8_t *) &px)[from.b];
row[to.a] = ((const uint8_t *) &px)[from.a];
row += sizeof(uint32_t);
}
buffer += rowstride;
}
}
|
