source: mainline/uspace/lib/memgfx/private/xlategc.h

Last change on this file was 8ce56a6, checked in by Jiri Svoboda <jiri@…>, 4 years ago

Translate window rendering in console/SSR with translation GC

In full-screen mode (such as text/console) and server-side rendering
we need other mechanism than memory GC to translate the coordinates
while rendering. We use a translation GC (xlategc).

Note the extensively elaborate testing of this very simple GC seems
quite overboard. At least the very elaborate test_gc_t could be hoisted
into a library and used wherever a test GC is required.

  • Property mode set to 100644
File size: 2.1 KB
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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 libmemgfx
30 * @{
31 */
32/**
33 * @file Translating graphics context structure
34 *
35 */
36
37#ifndef _MEMGFX_PRIVATE_XLATEGC_H
38#define _MEMGFX_PRIVATE_XLATEGC_H
39
40#include <gfx/bitmap.h>
41#include <gfx/context.h>
42#include <gfx/coord.h>
43#include <io/pixel.h>
44
45/** Actual structure of translating GC. */
46struct xlate_gc {
47 /** Graphic context */
48 gfx_context_t *gc;
49 /** Backing graphic context */
50 gfx_context_t *bgc;
51 /** Translation offset */
52 gfx_coord2_t off;
53};
54
55/** Bitmap in translating GC */
56typedef struct {
57 /** Containing translating GC */
58 struct xlate_gc *xgc;
59 /** Base bitmap in base GC */
60 gfx_bitmap_t *bm;
61} xlate_gc_bitmap_t;
62
63#endif
64
65/** @}
66 */
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