OSDSurface Class Reference

#include <osdsurface.h>

Detailed Description

Definition at line 19 of file osdsurface.h.


Public Member Functions
	OSDSurface (int w, int h)
	~OSDSurface ()
void	Clear (void)
void	ClearUsed (void)
bool	IsClear ()
bool	IntersectsDrawn (QRect &newrect)
void	AddRect (QRect &newrect)
bool	Changed (void)
void	SetChanged (bool change)
int	GetRevision ()
void	BlendToYV12 (unsigned char yptr, unsigned char uptr, unsigned char *vptr, int ystride, int ustride, int vstride) const
	Alpha blends OSDSurface to yuv buffer of the same size.
void	BlendToARGB (unsigned char *argbptr, uint stride, uint height, bool blendtoblack=false, uint threshold=0) const
	Alpha blends OSDSurface to ARGB buffer.
void	DitherToI44 (unsigned char *outbuf, bool ifirst, uint stride, uint height) const
	Copies and converts OSDSurface to either a greyscale IA44 or AI44 buffer.
void	DitherToIA44 (unsigned char *outbuf, uint stride, uint height) const
	Copies and converts OSDSurface to a greyscale IA44 buffer.
void	DitherToAI44 (unsigned char *outbuf, uint stride, uint height) const
	Copies and converts OSDSurface to a greyscale AI44 buffer.
Public Attributes
int	revision
unsigned char *	yuvbuffer
unsigned char *	y
unsigned char *	u
unsigned char *	v
unsigned char *	alpha
int	width
int	height
int	size
QRegion	usedRegions
QMutex	usedRegionsLock
short int	rec_lut [256]
short int *	rec_lut
unsigned char	pow_lut [256][256]
blendregion_ptr	blendregionfunc
blendcolumn2_ptr	blendcolumn2func
blendcolumn_ptr	blendcolumnfunc
blendcolor_ptr	blendcolorfunc
blendconst_ptr	blendconstfunc
bool	changed
bool	usemmx
unsigned char	cropTbl [256+2 *MAX_NEG_CROP]
unsigned char *	cm

Constructor & Destructor Documentation

OSDSurface::OSDSurface	(	int	w,
		int	h
	)

Definition at line 19 of file osdsurface.cpp.

OSDSurface::~OSDSurface ( )

Definition at line 80 of file osdsurface.cpp.

Member Function Documentation

void OSDSurface::Clear ( void )

Definition at line 86 of file osdsurface.cpp.

Referenced by OSDSurface().

void OSDSurface::ClearUsed ( void )

Definition at line 96 of file osdsurface.cpp.

Referenced by OSD::Display(), and OSD::Reinit().

bool OSDSurface::IsClear ( void )

Definition at line 139 of file osdsurface.cpp.

Referenced by OSD::Display().

bool OSDSurface::IntersectsDrawn ( QRect & newrect )

Definition at line 144 of file osdsurface.cpp.

Referenced by OSDTypeBox::Draw(), and OSDTypeImage::Draw().

void OSDSurface::AddRect ( QRect & newrect )

Definition at line 155 of file osdsurface.cpp.

Referenced by OSDTypePositionRectangle::Draw(), OSDTypeBox::Draw(), OSDTypeEditSlider::Draw(), OSDTypeImage::Draw(), OSDTypeTeletext::DrawRect(), and TTFFont::merge_text().

bool OSDSurface::Changed ( void ) [inline]

Definition at line 32 of file osdsurface.h.

Referenced by VideoOutput::DisplayOSD(), VideoOutputXv::DisplayOSD(), and VideoOutputQuartz::ProcessFrame().

void OSDSurface::SetChanged ( bool change ) [inline]

Definition at line 33 of file osdsurface.h.

Referenced by OSD::Display().

int OSDSurface::GetRevision ( ) [inline]

Definition at line 39 of file osdsurface.h.

Referenced by VideoOutput::DisplayOSD(), VideoOutputXv::DisplayOSD(), and ChromaKeyOSD::ProcessOSD().

void OSDSurface::BlendToYV12	(	unsigned char *	yptr,
		unsigned char *	uptr,
		unsigned char *	vptr,
		int	ystride,
		int	ustride,
		int	vstride
	)			const

Alpha blends OSDSurface to yuv buffer of the same size.

Parameters:

	yptrdest	Pointer to Y buffer to blend OSD to.
	uptrdest	Pointer to U buffer to blend OSD to.
	vptrdest	Pointer to V buffer to blend OSD to.

Definition at line 566 of file osdsurface.cpp.

Referenced by VideoOutput::DisplayOSD().

void OSDSurface::BlendToARGB	(	unsigned char *	argbptr,
		uint	stride,
		uint	height,
		bool	blendtoblack = `false`,
		uint	threshold = `0`
	)			const

Alpha blends OSDSurface to ARGB buffer.

Todo:: Currently blend_to_black is implemented as a post process on the whole frame, it would make sense to make this more efficient by integrating it into the process.

Parameters:

	stride	Length of each line in output buffer in bytes
	outheight	Number of lines in output buffer
	blend_to_black	Uses Alpha to blend buffer to black
	threshold	Alpha threshold above which to perform blending

Definition at line 690 of file osdsurface.cpp.

Referenced by VideoOutput::DisplayOSD(), and ChromaKeyOSD::ProcessOSD().

void OSDSurface::DitherToI44	(	unsigned char *	outbuf,
		bool	ifirst,
		uint	stride,
		uint	height
	)			const

Copies and converts OSDSurface to either a greyscale IA44 or AI44 buffer.

See also:: DitherToIA44(unsigned char*,uint,uint) const, DitherToAI44(unsigned char*,uint,uint) const.

Parameters:

	outbuf	Output buffer
	ifirst	If true output buffer is AI44, otherwise it is IA44
	stride	Length of each line in output buffer in bytes
	outheight	Number of lines in output buffer