131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
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* Copyright (c) 2012, 2013, 2014, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* session.c
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* Handles session management.
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*/
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#include <sys/ioctl.h>
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#include <sys/display.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <dispd.h>
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#include "session.h"
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struct dispd_session* global_session = NULL;
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bool dispd__session_initialize(int* argc, char*** argv)
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{
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(void) argc;
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(void) argv;
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size_t size = sizeof(struct dispd_session);
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global_session = (struct dispd_session*) malloc(size);
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if ( !global_session )
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return false;
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memset(global_session, 0, sizeof(*global_session));
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int tty_fd = open("/dev/tty", O_RDWR);
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if ( tty_fd < 0 )
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return free(global_session), false;
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struct tiocgdisplay display;
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struct tiocgdisplays gdisplays;
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memset(&gdisplays, 0, sizeof(gdisplays));
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gdisplays.count = 1;
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gdisplays.displays = &display;
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bool fail = ioctl(tty_fd, TIOCGDISPLAYS, &gdisplays) < 0 ||
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gdisplays.count == 0;
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close(tty_fd);
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if ( fail )
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return free(global_session), false;
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global_session->device = display.device;
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global_session->connector = display.connector;
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return true;
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}
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struct dispd_session* dispd_attach_default_session()
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{
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global_session->refcount++;
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return global_session;
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}
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bool dispd_detach_session(struct dispd_session* session)
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{
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session->refcount--;
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return true;
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}
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bool dispd_session_setup_game_rgba(struct dispd_session* session)
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{
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if ( session->is_rgba )
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return true;
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if ( session->current_window )
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return false;
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struct dispmsg_get_crtc_mode msg;
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msg.msgid = DISPMSG_GET_CRTC_MODE;
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msg.device = session->device;
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msg.connector = session->connector;
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if ( dispmsg_issue(&msg, sizeof(msg)) != 0 )
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return false;
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if ( !(msg.mode.control & 1) || msg.mode.fb_format != 32 )
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{
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pid_t childpid = fork();
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if ( childpid < 0 )
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return false;
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if ( childpid )
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{
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int status;
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waitpid(childpid, &status, 0);
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return session->is_rgba = (WIFEXITED(status) && !WEXITSTATUS(status));
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}
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const char* chvideomode = "chvideomode";
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#if 1
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// TODO chvideomode currently launches --bpp 32 as a program...
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execlp(chvideomode, chvideomode, (const char*) NULL);
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#else
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execlp(chvideomode, chvideomode,
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"--bpp", "32",
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"--show-graphics", "true",
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"--show-text", "false",
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(const char*) NULL);
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#endif
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err(127, "%s", chvideomode);
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}
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// HACK: The console may be rendered asynchronously and it might still be
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// rendering to the framebuffer, however this process is about to do
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// bitmapped graphics to the framebuffer as well. Since there is no
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// synchronization with the terminal except not writing to it, there
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// is a small window where both are fighting for the framebuffer.
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// We can resolve this issue by simply fsync()ing the terminal, which
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// causes the scheduled console rendering to finish before returning.
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int tty_fd = open("/dev/tty", O_WRONLY);
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if ( 0 <= tty_fd )
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{
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fsync(tty_fd);
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close(tty_fd);
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}
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return session->is_rgba = true;
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}
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