kmsgrab.cpp File Reference

Definitions for KMS screen capture. More...

#include <drm_fourcc.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/dma-buf.h>
#include <sys/capability.h>
#include <sys/mman.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <filesystem>
#include <thread>
#include "src/config.h"
#include "src/logging.h"
#include "src/platform/common.h"
#include "src/round_robin.h"
#include "src/utility.h"
#include "src/video.h"
#include "cuda.h"
#include "graphics.h"
#include "vaapi.h"
#include "wayland.h"

Include dependency graph for kmsgrab.cpp:

Classes
class	platf::kms::cap_sys_admin
struct	platf::kms::card_descriptor_t
class	platf::kms::card_t
struct	platf::kms::connector_t
struct	platf::kms::cursor_t
class	platf::kms::display_ram_t
class	platf::kms::display_t
class	platf::kms::display_vram_t
struct	platf::kms::kms_img_t
struct	platf::kms::monitor_t
class	platf::kms::plane_it_t
class	platf::kms::wrapper_fb

Macros
#define	_CONVERT(x, y)    if (string == x) return DRM_MODE_CONNECTOR_##y

Typedefs
using	platf::kms::conn_type_count_t = std::map<std::uint32_t, std::uint32_t>
using	platf::kms::crtc_t = util::safe_ptr<drmModeCrtc, drmModeFreeCrtc>
using	platf::kms::encoder_t = util::safe_ptr<drmModeEncoder, drmModeFreeEncoder>
using	platf::kms::fb_t = std::unique_ptr<wrapper_fb>
using	platf::kms::obj_prop_t = util::safe_ptr<drmModeObjectProperties, drmModeFreeObjectProperties>
using	platf::kms::plane_res_t = util::safe_ptr<drmModePlaneRes, drmModeFreePlaneResources>
using	platf::kms::plane_t = util::safe_ptr<drmModePlane, drmModeFreePlane>
using	platf::kms::prop_blob_t = util::safe_ptr<drmModePropertyBlobRes, drmModeFreePropertyBlob>
using	platf::kms::prop_t = util::safe_ptr<drmModePropertyRes, drmModeFreeProperty>
using	platf::kms::res_t = util::safe_ptr<drmModeRes, drmModeFreeResources>
using	platf::kms::version_t = util::safe_ptr<drmVersion, drmFreeVersion>

Functions
void	platf::correlate_to_wayland (std::vector< kms::card_descriptor_t > &cds)
std::shared_ptr< display_t >	platf::kms_display (mem_type_e hwdevice_type, const std::string &display_name, const ::video::config_t &config)
std::vector< std::string >	platf::kms_display_names (mem_type_e hwdevice_type)
std::map< std::uint32_t, monitor_t >	platf::kms::map_crtc_to_monitor (const std::vector< connector_t > &connectors)
std::string_view	platf::kms::plane_type (std::uint64_t val)
void	platf::kms::print (plane_t::pointer plane, fb_t::pointer fb, crtc_t::pointer crtc)

Detailed Description

Definitions for KMS screen capture.

Function Documentation

correlate_to_wayland()

void platf::correlate_to_wayland

(

std::vector< kms::card_descriptor_t > &

cds

)

On Wayland, it's not possible to determine the position of the monitor on the desktop with KMS. Wayland does allow applications to query attached monitors on the desktop, however, the naming scheme is not standardized across implementations.

As a result, correlating the KMS output to the wayland outputs is guess work at best. But, it's necessary for absolute mouse coordinates to work.

This is an ugly hack :(