LookingGlass/common/KVMGFXHeader.h

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#pragma once
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/*
KVMGFX Client - A KVM Client for VGA Passthrough
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
This program 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; either version 2 of the License, or (at your option) any later
version.
This program 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, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
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#include <stdint.h>
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#define KVMGFX_HEADER_MAGIC "[[KVMGFXHeader]]"
typedef enum FrameType
{
FRAME_TYPE_INVALID ,
FRAME_TYPE_ARGB , // ABGR interleaved: A,R,G,B 32bpp
FRAME_TYPE_RGB , // RGB interleaved : R,G,B 24bpp
FRAME_TYPE_XOR , // xor of the previous frame: R, G, B
FRAME_TYPE_YUV444P , // YUV444 planar
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FRAME_TYPE_YUV420P , // YUV420 12bpp
FRAME_TYPE_ARGB10 , // rgb 10 bit packed, a2 b10 r10
FRAME_TYPE_MAX , // sentinel value
} FrameType;
typedef enum FrameComp
{
FRAME_COMP_NONE , // no compression
FRAME_COMP_BLACK_RLE , // basic run length encoding of black pixels for XOR mode
FRAME_COMP_MAX , // sentinel valule
} FrameComp;
struct KVMGFXHeader
{
char magic[sizeof(KVMGFX_HEADER_MAGIC)];
uint32_t version; // version of this structure
uint16_t hostID; // the host ivshmem client id
uint16_t guestID; // the guest ivshmem client id
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FrameType frameType; // the frame type
FrameComp compType; // frame compression mode
uint32_t width; // the width
uint32_t height; // the height
uint32_t stride; // the row stride
int32_t mouseX; // the initial mouse X position
int32_t mouseY; // the initial mouse Y position
uint64_t dataLen; // total lengh of the data after this header
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uint64_t dataPos; // offset to the frame
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};
#pragma pack(push,1)
struct RLEHeader
{
uint8_t magic[3];
uint16_t length;
};
#pragma pack(pop)