DRM buffer class. More...

#include <fcntl.h>
#include "drmdevice.h"
#include "logger.h"
#include "pool.h"

Include dependency graph for drmbuffer.cpp:

Macros
#define	ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

Functions
const struct format_info *	FindFormat (uint32_t format)
	Find infos for the given pixel format. More...

Variables
static const struct format_info	format_info_array []
	Infos of a pixel format. More...

Detailed Description

DRM buffer class.

This files defines cDrmBuffer, which is a class used to describe a DRM buffer, keeping framebuffer and prime handles to be used by the kernel display interface.

Copyright: (c) 2018 by zille. All Rights Reserved.; (c) 2025 by Andreas Baierl. All Rights Reserved.

License{AGPLv3

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License.

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 Affero General Public License for more details.}

Definition in file drmbuffer.cpp.

Macro Definition Documentation

◆ ARRAY_SIZE

#define ARRAY_SIZE ( arr ) (sizeof(arr) / sizeof((arr)[0]))

Definition at line 243 of file drmbuffer.cpp.

Function Documentation

◆ FindFormat()

const struct format_info * FindFormat ( uint32_t format )

Find infos for the given pixel format.

Parameters

format pixel format

Returns: the infos of the format as a struct

Definition at line 252 of file drmbuffer.cpp.

References ARRAY_SIZE, format_info::format, and format_info_array.

Referenced by cDrmBuffer::Setup().

Variable Documentation

◆ format_info_array

const struct format_info format_info_array[]

static

Initial value:

= {
    { DRM_FORMAT_NV12, "NV12", 2, { { 8, 1, 1 }, { 16, 2, 2 } }, },
    { DRM_FORMAT_YUV420, "YU12", 3, { { 8, 1, 1 }, { 8, 2, 2 }, {8, 2, 2 } }, },
    { DRM_FORMAT_ARGB8888, "AR24", 1, { { 32, 1, 1 } }, },
}

Infos of a pixel format.

Each entry describes a format in the following matter: { uint32_t format, const char *fourcc, uint8_t num_planes, struct format_plane_info planes[4] }

The format_plane_info is: { uint8_t bitspp, uint8_t xsub, uint8_t ysub, }

Definition at line 237 of file drmbuffer.cpp.

Referenced by FindFormat().

Macros

Functions