| 1 | /* $Id: HGSMIChannels.h 93115 2022-01-01 11:31:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * VBox Host Guest Shared Memory Interface (HGSMI).
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| 5 | * Host/Guest shared part.
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| 6 | * Channel identifiers.
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * Copyright (C) 2006-2022 Oracle Corporation
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| 11 | *
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| 12 | * Permission is hereby granted, free of charge, to any person
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| 13 | * obtaining a copy of this software and associated documentation
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| 14 | * files (the "Software"), to deal in the Software without
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| 15 | * restriction, including without limitation the rights to use,
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| 16 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 17 | * copies of the Software, and to permit persons to whom the
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| 18 | * Software is furnished to do so, subject to the following
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| 19 | * conditions:
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| 20 | *
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| 21 | * The above copyright notice and this permission notice shall be
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| 22 | * included in all copies or substantial portions of the Software.
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| 23 | *
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| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 26 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 28 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 29 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 30 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 31 | * OTHER DEALINGS IN THE SOFTWARE.
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| 32 | */
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| 33 |
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| 34 | #ifndef VBOX_INCLUDED_Graphics_HGSMIChannels_h
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| 35 | #define VBOX_INCLUDED_Graphics_HGSMIChannels_h
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| 36 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 37 | # pragma once
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| 38 | #endif
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| 39 |
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| 40 |
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| 41 | /*
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| 42 | * Each channel has an 8 bit identifier. There are a number of predefined
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| 43 | * (hardcoded) channels.
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| 44 | *
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| 45 | * HGSMI_CH_HGSMI channel can be used to map a string channel identifier
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| 46 | * to a free 16 bit numerical value. values are allocated in range
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| 47 | * [HGSMI_CH_STRING_FIRST;HGSMI_CH_STRING_LAST].
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| 48 | */
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| 49 |
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| 50 |
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| 51 | /* Predefined channel identifiers. Used internally by VBOX to simplify the channel setup. */
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| 52 | /* A reserved channel value */
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| 53 | #define HGSMI_CH_RESERVED 0x00
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| 54 | /* HGCMI: setup and configuration */
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| 55 | #define HGSMI_CH_HGSMI 0x01
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| 56 | /* Graphics: VBVA */
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| 57 | #define HGSMI_CH_VBVA 0x02
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| 58 | /* Graphics: Seamless with a single guest region */
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| 59 | #define HGSMI_CH_SEAMLESS 0x03
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| 60 | /* Graphics: Seamless with separate host windows */
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| 61 | #define HGSMI_CH_SEAMLESS2 0x04
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| 62 | /* Graphics: OpenGL HW acceleration */
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| 63 | #define HGSMI_CH_OPENGL 0x05
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| 64 |
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| 65 |
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| 66 | /* Dynamically allocated channel identifiers. */
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| 67 | /* The first channel index to be used for string mappings (inclusive) */
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| 68 | #define HGSMI_CH_STRING_FIRST 0x20
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| 69 | /* The last channel index for string mappings (inclusive) */
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| 70 | #define HGSMI_CH_STRING_LAST 0xff
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| 71 |
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| 72 |
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| 73 | /* Check whether the channel identifier is allocated for a dynamic channel */
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| 74 | #define HGSMI_IS_DYNAMIC_CHANNEL(_channel) (((uint8_t)(_channel) & 0xE0) != 0)
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| 75 |
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| 76 |
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| 77 | #endif /* !VBOX_INCLUDED_Graphics_HGSMIChannels_h */
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