Xash3D FWGS engine.
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#include "platform/platform.h"
#if XASH_VIDEO == VIDEO_FBDEV
#include "input.h"
#include "client.h"
#include "filesystem.h"
#include "vid_common.h"
#include <fcntl.h>
#include <errno.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#if XASH_ANDROID
#include <linux/kd.h>
#else
#include <sys/kd.h>
#endif
struct fb_s
{
int fd, tty_fd;
void *map;
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
qboolean vsync;
int doublebuffer;
} fb;
#define DEFAULT_FBDEV "/dev/fb0"
/*
========================
Android_SwapBuffers
Update screen. Use native EGL if possible
========================
*/
void GL_SwapBuffers( void )
{
}
void FB_GetScreenRes( int *x, int *y )
{
*x = fb.vinfo.xres;
*y = fb.vinfo.yres;
}
qboolean R_Init_Video( const int type )
{
qboolean retval;
string fbdev = DEFAULT_FBDEV;
fb.fd = -1;
VID_StartupGamma();
if( type != REF_SOFTWARE )
return false;
Sys_GetParmFromCmdLine( "-fbdev", fbdev );
fb.fd = open( fbdev, O_RDWR );
if( fb.fd < 0 )
{
Con_Printf( S_ERROR, "failed to open framebuffer device: %s\n", strerror(errno));
}
if( Sys_CheckParm( "-ttygfx" ) )
fb.tty_fd = open( "/dev/tty", O_RDWR ); // only need this to set graphics mode, optional
ioctl(fb.fd, FBIOGET_FSCREENINFO, &fb.finfo);
ioctl(fb.fd, FBIOGET_VSCREENINFO, &fb.vinfo);
if( !(retval = VID_SetMode()) )
{
return retval;
}
host.renderinfo_changed = false;
return true;
}
void R_Free_Video( void )
{
// VID_DestroyWindow ();
// R_FreeVideoModes();
if( fb.doublebuffer )
{
fb.vinfo.yoffset = 0;
fb.vinfo.yres_virtual >>= 1;
ioctl( fb.fd, FBIOPAN_DISPLAY, &fb.vinfo );
}
if( fb.map )
munmap( fb.map, fb.finfo.smem_len );
close( fb.fd );
fb.fd = -1;
fb.map = NULL;
if( fb.tty_fd >= 0 )
{
ioctl( fb.tty_fd, KDSETMODE, KD_TEXT );
close( fb.tty_fd );
fb.tty_fd = -1;
}
ref.dllFuncs.GL_ClearExtensions();
}
qboolean VID_SetMode( void )
{
if( fb.tty_fd > 0 )
ioctl( fb.tty_fd, KDSETMODE, KD_GRAPHICS );
R_ChangeDisplaySettings( 0, 0, false ); // width and height are ignored anyway
return true;
}
rserr_t R_ChangeDisplaySettings( int width, int height, qboolean fullscreen )
{
int render_w, render_h;
uint rotate = vid_rotate->value;
FB_GetScreenRes( &width, &height );
render_w = width;
render_h = height;
Con_Reportf( "R_ChangeDisplaySettings: forced resolution to %dx%d)\n", width, height );
if( ref.dllFuncs.R_SetDisplayTransform( rotate, 0, 0, vid_scale->value, vid_scale->value ) )
{
if( rotate & 1 )
{
int swap = render_w;
render_w = render_h;
render_h = swap;
}
render_h /= vid_scale->value;
render_w /= vid_scale->value;
}
else
{
Con_Printf( S_WARN "failed to setup screen transform\n" );
}
R_SaveVideoMode( width, height, render_w, render_h );
return rserr_ok;
}
int GL_SetAttribute( int attr, int val )
{
return 0;
}
int GL_GetAttribute( int attr, int *val )
{
return 0;
}
int R_MaxVideoModes( void )
{
return 0;
}
vidmode_t* R_GetVideoMode( int num )
{
return NULL;
}
void* GL_GetProcAddress( const char *name ) // RenderAPI requirement
{
return NULL;
}
void GL_UpdateSwapInterval( void )
{
// disable VSync while level is loading
if( cls.state < ca_active )
{
// setup fb vsync here
fb.vsync = false;
SetBits( gl_vsync->flags, FCVAR_CHANGED );
}
else if( FBitSet( gl_vsync->flags, FCVAR_CHANGED ))
{
ClearBits( gl_vsync->flags, FCVAR_CHANGED );
fb.vsync = true;
}
}
void *SW_LockBuffer( void )
{
if( fb.vsync )
{
int stub = 0;
ioctl(fb.fd, FBIO_WAITFORVSYNC, &stub);
}
if( fb.doublebuffer )
{
static int page = 0;
page = !page;
fb.vinfo.yoffset = page * fb.vinfo.yres;
return fb.map + page * fb.doublebuffer;
}
else
return fb.map;
}
void SW_UnlockBuffer( void )
{
// some single-buffer fb devices need this too
ioctl(fb.fd, FBIOPAN_DISPLAY, &fb.vinfo);
}
#define FB_BF_TO_MASK(x) (((1 << x.length) - 1) << (x.offset))
qboolean SW_CreateBuffer( int width, int height, uint *stride, uint *bpp, uint *r, uint *g, uint *b )
{
if( width > fb.vinfo.xres_virtual || height > fb.vinfo.yres_virtual )
{
Con_Printf( S_ERROR "requested size %dx%d not fit to framebuffer size %dx%d\n",
width, height, fb.vinfo.xres_virtual, fb.vinfo.yres_virtual );
return false;
}
*bpp = fb.vinfo.bits_per_pixel >> 3;
*stride = fb.vinfo.xres_virtual;
*r = FB_BF_TO_MASK(fb.vinfo.red);
*g = FB_BF_TO_MASK(fb.vinfo.green);
*b = FB_BF_TO_MASK(fb.vinfo.blue);
if( Sys_CheckParm("-doublebuffer") )
{
fb.doublebuffer = *bpp * *stride * fb.vinfo.yres;
fb.vinfo.yres_virtual = fb.vinfo.yres * 2;
if(ioctl (fb.fd, FBIOPUT_VSCREENINFO, &fb.vinfo ))
{
fb.vinfo.transp.length = fb.vinfo.transp.offset = 0;
if( ioctl (fb.fd, FBIOPUT_VSCREENINFO, &fb.vinfo ) )
{
Con_Printf( S_ERROR "failed to enable double buffering!\n" );
}
}
ioctl( fb.fd, FBIOGET_FSCREENINFO, &fb.finfo );
ioctl( fb.fd, FBIOGET_VSCREENINFO, &fb.vinfo );
ioctl( fb.fd, FBIOPAN_DISPLAY, &fb.vinfo );
if( fb.finfo.smem_len < fb.doublebuffer * 2 )
{
Con_Printf( S_ERROR "not enough memory for double buffering, disabling!\n" );
fb.doublebuffer = 0;
}
}
if( fb.map )
munmap(fb.map, fb.finfo.smem_len);
fb.map = mmap(0, fb.finfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fb.fd, 0);
if( !fb.map )
return false;
return true;
}
// unrelated stubs
void Platform_GetClipboardText( char *buffer, size_t size )
{
}
void Platform_SetClipboardText( const char *buffer, size_t size )
{
}
void Platform_PreCreateMove( void )
{
}
// will be implemented later
void Platform_RunEvents( void )
{
}
void *Platform_GetNativeObject( const char *name )
{
return NULL;
}
void GAME_EXPORT Platform_GetMousePos( int *x, int *y )
{
*x = *y = 0;
}
void GAME_EXPORT Platform_SetMousePos(int x, int y)
{
}
void Platform_Vibrate(float life, char flags)
{
}
int Platform_JoyInit( int numjoy )
{
return 0;
}
#endif