source: mainline/uspace/lib/gfx/private/color.h

Last change on this file was bc52b5b, checked in by Jiri Svoboda <jiri@…>, 4 years ago

Allow the use of EGA attributes/24-bit characters alongside RGB

In a big hack (since we cannot have different pixel formats yet) we
use a pixel format that allows both 24-bit RGB (without character)
or 24-bit character with 8-bit attributes. Thus in GFX we cannot
currently have characters with any RGB color, but we can set
foreground and background individually (and it even works in EGA mode).

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1/*
2 * Copyright (c) 2021 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libgfx
30 * @{
31 */
32/**
33 * @file Color structure
34 *
35 */
36
37#ifndef _GFX_PRIVATE_COLOR_H
38#define _GFX_PRIVATE_COLOR_H
39
40#include <stdint.h>
41
42/** Actual structure of graphics color.
43 *
44 * This is private to libgfx. It is not visible to clients nor backends.
45 */
46struct gfx_color {
47 uint16_t r;
48 uint16_t g;
49 uint16_t b;
50 uint8_t attr;
51};
52
53#endif
54
55/** @}
56 */
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