ev3dev.utils.io

Class NativeFramebuffer

java.lang.Object

ev3dev.utils.io.NativeFile

ev3dev.utils.io.NativeDevice

ev3dev.utils.io.NativeFramebuffer

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class NativeFramebuffer
extends NativeDevice

Linux framebuffer wrapper class

Since:

2.4.7

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NativeFramebuffer.fb_bitfield fb_bitfield mapping
static class	NativeFramebuffer.fb_con2fbmap
static class	NativeFramebuffer.fb_fix_screeninfo fb_fix_screeninfo mapping
static class	NativeFramebuffer.fb_var_screeninfo fb_var_screeninfo mapping

Field Summary

Fields inherited from class ev3dev.utils.io.NativeFile

fd

Constructor Summary

Constructors

Constructor and Description
NativeFramebuffer(java.lang.String dname) Create a native device to provide access to the specified character device
NativeFramebuffer(java.lang.String dname, ILibc libc) Create a native device to provide access to the specified character device
NativeFramebuffer(java.lang.String dname, int flags) Create a native device to provide access to the specified character device
NativeFramebuffer(java.lang.String dname, int flags, ILibc libc) Create a native device to provide access to the specified character device

Method Summary

Modifier and Type	Method and Description
NativeFramebuffer.fb_fix_screeninfo	getFixedScreenInfo() Fetch fixed screen info.
NativeFramebuffer.fb_var_screeninfo	getVariableScreenInfo() Fetch variable screen info.
int	mapConsoleToFramebuffer(int console) Identify which framebuffer is connected to a specified VT.
void	setVariableScreenInfo(NativeFramebuffer.fb_var_screeninfo info) Send variable screen info.

Methods inherited from class ev3dev.utils.io.NativeDevice

mmap

Methods inherited from class ev3dev.utils.io.NativeFile

close, ioctl, ioctl, isOpen, mmap, msync, munmap, open, open, read, read, write, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NativeFramebuffer

public NativeFramebuffer(java.lang.String dname)
                  throws LastErrorException

Create a native device to provide access to the specified character device

Parameters:

dname - name of the character device

Throws:

LastErrorException - when operations fails

NativeFramebuffer

public NativeFramebuffer(java.lang.String dname,
                         int flags)
                  throws LastErrorException

Create a native device to provide access to the specified character device

Parameters:

dname - name of the character device

flags - Opening mode, e.g. read, write or both.

Throws:

LastErrorException - when operations fails

NativeFramebuffer

public NativeFramebuffer(java.lang.String dname,
                         ILibc libc)
                  throws LastErrorException

Create a native device to provide access to the specified character device

Parameters:

dname - name of the character device

libc - standard C library interface to be used.

Throws:

LastErrorException - when operations fails

NativeFramebuffer

public NativeFramebuffer(java.lang.String dname,
                         int flags,
                         ILibc libc)
                  throws LastErrorException

Create a native device to provide access to the specified character device

Parameters:

dname - name of the character device

flags - Opening mode, e.g. read, write or both.

libc - standard C library interface to be used.

Throws:

LastErrorException - when operations fails

Method Detail

getFixedScreenInfo

public NativeFramebuffer.fb_fix_screeninfo getFixedScreenInfo()
                                                       throws LastErrorException

Fetch fixed screen info.

Returns:

Non-changing info about the display.

Throws:

LastErrorException

getVariableScreenInfo

public NativeFramebuffer.fb_var_screeninfo getVariableScreenInfo()
                                                          throws LastErrorException

Fetch variable screen info.

Returns:

Changeable info about the display.

Throws:

LastErrorException - when operations fails

setVariableScreenInfo

public void setVariableScreenInfo(NativeFramebuffer.fb_var_screeninfo info)
                           throws LastErrorException

Send variable screen info.

Parameters:

info - Changeable info about the display.

Throws:

LastErrorException - when operations fails

mapConsoleToFramebuffer

public int mapConsoleToFramebuffer(int console)
                            throws LastErrorException

Identify which framebuffer is connected to a specified VT.

Parameters:

console - VT number.

Returns:

Framebuffer number or -1 if console has no framebuffer.

Throws:

LastErrorException - when operations fails