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#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <memory.h>
#include <linux/kd.h>
#include <lib/gdi/fb.h>
#ifndef FBIO_WAITFORVSYNC
#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
#endif
fbClass *fbClass::instance;
fbClass *fbClass::getInstance()
{
return instance;
}
fbClass::fbClass(const char *fb)
{
instance=this;
locked=0;
available=0;
cmap.start=0;
cmap.len=256;
cmap.red=red;
cmap.green=green;
cmap.blue=blue;
cmap.transp=trans;
fd=open(fb, O_RDWR);
if (fd<0)
{
perror(fb);
goto nolfb;
}
if (ioctl(fd, FBIOGET_VSCREENINFO, &screeninfo)<0)
{
perror("FBIOGET_VSCREENINFO");
goto nolfb;
}
memcpy(&oldscreen, &screeninfo, sizeof(screeninfo));
fb_fix_screeninfo fix;
if (ioctl(fd, FBIOGET_FSCREENINFO, &fix)<0)
{
perror("FBIOGET_FSCREENINFO");
goto nolfb;
}
available=fix.smem_len;
eDebug("%dk video mem", available/1024);
lfb=(unsigned char*)mmap(0, available, PROT_WRITE|PROT_READ, MAP_SHARED, fd, 0);
if (!lfb)
{
perror("mmap");
goto nolfb;
}
showConsole(0);
return;
nolfb:
lfb=0;
printf("framebuffer not available.\n");
return;
}
int fbClass::showConsole(int state)
{
int fd=open("/dev/vc/0", O_RDWR);
if(fd>=0)
{
if(ioctl(fd, KDSETMODE, state?KD_TEXT:KD_GRAPHICS)<0)
{
eDebug("setting /dev/vc/0 status failed.");
}
close(fd);
}
return 0;
}
int fbClass::SetMode(unsigned int nxRes, unsigned int nyRes, unsigned int nbpp)
{
screeninfo.xres_virtual=screeninfo.xres=nxRes;
screeninfo.yres_virtual=(screeninfo.yres=nyRes)*2;
screeninfo.height=0;
screeninfo.width=0;
screeninfo.xoffset=screeninfo.yoffset=0;
screeninfo.bits_per_pixel=nbpp;
if (ioctl(fd, FBIOPUT_VSCREENINFO, &screeninfo)<0)
{
// try single buffering
screeninfo.yres_virtual=screeninfo.yres=nyRes;
if (ioctl(fd, FBIOPUT_VSCREENINFO, &screeninfo)<0)
{
perror("FBIOPUT_VSCREENINFO");
printf("fb failed\n");
return -1;
}
eDebug(" - double buffering not available.");
} else
eDebug(" - double buffering available!");
m_number_of_pages = screeninfo.yres_virtual / nyRes;
ioctl(fd, FBIOGET_VSCREENINFO, &screeninfo);
if ((screeninfo.xres!=nxRes) && (screeninfo.yres!=nyRes) && (screeninfo.bits_per_pixel!=nbpp))
{
eDebug("SetMode failed: wanted: %dx%dx%d, got %dx%dx%d",
nxRes, nyRes, nbpp,
screeninfo.xres, screeninfo.yres, screeninfo.bits_per_pixel);
}
xRes=screeninfo.xres;
yRes=screeninfo.yres;
bpp=screeninfo.bits_per_pixel;
fb_fix_screeninfo fix;
if (ioctl(fd, FBIOGET_FSCREENINFO, &fix)<0)
{
perror("FBIOGET_FSCREENINFO");
printf("fb failed\n");
}
stride=fix.line_length;
memset(lfb, 0, stride*yRes);
return 0;
}
int fbClass::setOffset(int off)
{
screeninfo.xoffset = 0;
screeninfo.yoffset = off;
return ioctl(fd, FBIOPAN_DISPLAY, &screeninfo);
}
int fbClass::waitVSync()
{
int c = 0;
return ioctl(fd, FBIO_WAITFORVSYNC, &c);
}
fbClass::~fbClass()
{
if (available)
ioctl(fd, FBIOPUT_VSCREENINFO, &oldscreen);
if (lfb)
munmap(lfb, available);
showConsole(1);
}
int fbClass::PutCMAP()
{
return ioctl(fd, FBIOPUTCMAP, &cmap);
}
int fbClass::lock()
{
if (locked)
return -1;
locked=1;
return fd;
}
void fbClass::unlock()
{
if (!locked)
return;
locked=0;
SetMode(xRes, yRes, bpp);
PutCMAP();
}
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