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SDL_fbvideo.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* SDL fbcon video driver implementation based on dummy, ps3 video driver
* and sourcecode of the fbcon implementation in sdl-1.2
*
* Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
* of this was cut-and-pasted from Stephane Peter's work in the AAlib
* SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
*/
#include "SDL_video.h"
#include "../SDL_sysvideo.h"
#include "SDL_fbvideo.h"
#include "SDL_fbevents_c.h"
#include "SDL_fbrender_c.h"
#include "SDL_fbmodes_c.h"
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#ifndef HAVE_GETPAGESIZE
#include <asm/page.h> /* For definition of PAGE_SIZE */
#endif
#include <linux/vt.h>
#define FBVID_DRIVER_NAME "fbcon"
/* Initialization/Query functions */
static int FB_VideoInit(_THIS);
static int FB_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
static void FB_VideoQuit(_THIS);
/* bootstrap functions */
static int
FB_Available(void)
{
deprintf(1, "+FB_Available()\n");
const char *envr = SDL_getenv("SDL_VIDEODRIVER");
if ((envr) && (SDL_strcmp(envr, FBVID_DRIVER_NAME) == 0)) {
return (1);
}
int console = -1;
/* Added check for /fb/0 (devfs) */
/* but - use environment variable first... if it fails, still check defaults */
int idx = 0;
const char *SDL_fbdevs[4] = { NULL, "/dev/fb0", "/dev/fb/0", NULL };
SDL_fbdevs[0] = SDL_getenv("SDL_FBDEV");
if (!SDL_fbdevs[0]) {
idx++;
}
for (; SDL_fbdevs[idx]; idx++) {
console = open(SDL_fbdevs[idx], O_RDWR, 0);
if (console >= 0) {
close(console);
break;
}
}
deprintf(1, "-FB_Available()\n");
return (console >= 0);
}
static void
FB_DeleteDevice(SDL_VideoDevice * device)
{
deprintf(1, "+FB_DeleteDevice()\n");
SDL_free(device->driverdata);
SDL_free(device);
deprintf(1, "-FB_DeleteDevice()\n");
}
static SDL_VideoDevice *
FB_CreateDevice(int devindex)
{
deprintf(1, "+FB_CreateDevice()\n");
SDL_VideoDevice *device;
SDL_VideoData *data;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
if (!device) {
SDL_OutOfMemory();
if (device) {
SDL_free(device);
}
return (0);
}
data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
if (!data) {
SDL_OutOfMemory();
SDL_free(device);
return (0);
}
device->driverdata = data;
/* Set the function pointers */
device->VideoInit = FB_VideoInit;
device->VideoQuit = FB_VideoQuit;
device->SetDisplayMode = FB_SetDisplayMode;
device->PumpEvents = FB_PumpEvents;
device->free = FB_DeleteDevice;
deprintf(1, "-FB_CreateDevice()\n");
return device;
}
VideoBootStrap FB_bootstrap = {
FBVID_DRIVER_NAME, "Linux framebuffer video driver",
FB_Available, FB_CreateDevice
};
int
FB_VideoInit(_THIS)
{
deprintf(1, "+FB_VideoInit()\n");
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
SDL_DisplayMode mode;
struct fb_fix_screeninfo finfo;
const char *SDL_fbdev;
/* Initialize the library */
SDL_fbdev = SDL_getenv("SDL_FBDEV");
if (SDL_fbdev == NULL) {
SDL_fbdev = "/dev/fb0";
}
data->console_fd = open(SDL_fbdev, O_RDWR, 0);
if (data->console_fd < 0) {
SDL_SetError("Unable to open %s", SDL_fbdev);
return -1;
}
#if !SDL_THREADS_DISABLED
/* Create the hardware surface lock mutex */
data->hw_lock = SDL_CreateMutex();
if (data->hw_lock == NULL) {
SDL_SetError("Unable to create lock mutex");
FB_VideoQuit(_this);
return -1;
}
#endif
/* Get the type of video hardware */
if (ioctl(data->console_fd, FBIOGET_FSCREENINFO, &finfo) < 0) {
SDL_SetError("Couldn't get console hardware info");
FB_VideoQuit(_this);
return -1;
}
/* Use a fake 32-bpp desktop mode */
mode.format = SDL_PIXELFORMAT_RGB888;
mode.w = 1024;
mode.h = 768;
mode.refresh_rate = 0;
mode.driverdata = NULL;
SDL_AddBasicVideoDisplay(&mode);
SDL_AddRenderDriver(0, &SDL_FB_RenderDriver);
SDL_zero(mode);
SDL_AddDisplayMode(0, &mode);
/* We're done! */
deprintf(1, "-FB_VideoInit()\n");
return 0;
}
static int
FB_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
{
deprintf(1, "+FB_SetDisplayMode()\n");
deprintf(1, "-FB_SetDisplayMode()\n");
return 0;
}
void
FB_VideoQuit(_THIS)
{
deprintf(1, "+FB_VideoQuit()\n");
deprintf(1, "-FB_VideoQuit()\n");
}