#include <cairo_compositor.h>

Inheritance diagram for KIGFX::CAIRO_COMPOSITOR:

Classes
struct	CAIRO_BUFFER

Public Member Functions
	CAIRO_COMPOSITOR (cairo_t **aMainContext)

virtual	~CAIRO_COMPOSITOR ()

virtual void	Initialize () override
	Perform primary initialization, necessary to use the object.

virtual void	Resize (unsigned int aWidth, unsigned int aHeight) override
	Clear the state of COMPOSITOR, so it has to be reinitialized again with the new dimensions.

virtual unsigned int	CreateBuffer () override
	Prepare a new buffer that may be used as a rendering target.

virtual unsigned int	GetBuffer () const override
	Return currently used buffer handle.

virtual void	SetBuffer (unsigned int aBufferHandle) override
	Set the selected buffer as the rendering target.

virtual void	Begin () override
	Call this at the beginning of each frame.

virtual void	ClearBuffer (const COLOR4D &aColor) override
	Clear the selected buffer (set by the SetBuffer() function).

void	DrawBuffer (unsigned int aSourceHandle, unsigned int aDestHandle, cairo_operator_t op)
	Paints source to destination using the cairo operator.

virtual void	DrawBuffer (unsigned int aBufferHandle) override
	Draw the selected buffer to the output buffer.

virtual void	Present () override
	Call this to present the output buffer to the screen.

void	SetAntialiasingMode (CAIRO_ANTIALIASING_MODE aMode)

CAIRO_ANTIALIASING_MODE	GetAntialiasingMode () const

virtual void	SetMainContext (cairo_t *aMainContext)
	Set a context to be treated as the main context (ie.

Protected Types
typedef uint8_t *	BitmapPtr

typedef std::deque< CAIRO_BUFFER >	CAIRO_BUFFERS

Protected Member Functions
void	clean ()
	Perform freeing of resources.

unsigned int	usedBuffers ()
	Return number of currently used buffers.

Protected Attributes
unsigned int	m_current
	Currently used buffer handle.

cairo_t **	m_currentContext
	Pointer to the current context, so it can be changed.

cairo_t *	m_mainContext
	Rendering target used for compositing (the main display)

cairo_matrix_t	m_matrix
	Transformation matrix.

CAIRO_BUFFERS	m_buffers
	Stores information about initialized buffers.

unsigned int	m_stride
	Stride to use given the desired format and width.

unsigned int	m_bufferSize
	Amount of memory needed to store a buffer.

cairo_antialias_t	m_currentAntialiasingMode

unsigned int	m_width
	Width of the buffer (in pixels)

unsigned int	m_height
	Height of the buffer (in pixels)

Detailed Description

Definition at line 44 of file cairo_compositor.h.

Member Typedef Documentation

◆ BitmapPtr

typedef uint8_t* KIGFX::CAIRO_COMPOSITOR::BitmapPtr

protected

Definition at line 129 of file cairo_compositor.h.

◆ CAIRO_BUFFERS

typedef std::deque<CAIRO_BUFFER> KIGFX::CAIRO_COMPOSITOR::CAIRO_BUFFERS

protected

Definition at line 138 of file cairo_compositor.h.

Constructor & Destructor Documentation

◆ CAIRO_COMPOSITOR()

CAIRO_COMPOSITOR::CAIRO_COMPOSITOR ( cairo_t ** aMainContext )

Definition at line 38 of file cairo_compositor.cpp.

References m_bufferSize, m_matrix, and m_stride.

◆ ~CAIRO_COMPOSITOR()

CAIRO_COMPOSITOR::~CAIRO_COMPOSITOR ( )

virtual

Definition at line 51 of file cairo_compositor.cpp.

References clean().

Member Function Documentation

◆ Begin()

void CAIRO_COMPOSITOR::Begin ( )

overridevirtual

Call this at the beginning of each frame.

Implements KIGFX::COMPOSITOR.

Definition at line 133 of file cairo_compositor.cpp.

◆ clean()

void CAIRO_COMPOSITOR::clean ( )

protected

Perform freeing of resources.

Definition at line 191 of file cairo_compositor.cpp.

References m_buffers.

Referenced by Resize(), SetAntialiasingMode(), and ~CAIRO_COMPOSITOR().

◆ ClearBuffer()

void CAIRO_COMPOSITOR::ClearBuffer ( const COLOR4D & aColor )

overridevirtual

Clear the selected buffer (set by the SetBuffer() function).

Implements KIGFX::COMPOSITOR.

Definition at line 138 of file cairo_compositor.cpp.

References m_buffers, m_bufferSize, and m_current.

◆ CreateBuffer()

unsigned int CAIRO_COMPOSITOR::CreateBuffer ( )

overridevirtual

Prepare a new buffer that may be used as a rendering target.

Returns: is the handle of the buffer. In case of failure 0 (zero) is returned as the handle.

Implements KIGFX::COMPOSITOR.

Definition at line 88 of file cairo_compositor.cpp.

References m_buffers, m_bufferSize, m_currentAntialiasingMode, KIGFX::COMPOSITOR::m_height, m_mainContext, m_matrix, m_stride, KIGFX::COMPOSITOR::m_width, and usedBuffers().

◆ DrawBuffer() [1/2]

void CAIRO_COMPOSITOR::DrawBuffer ( unsigned int aBufferHandle )

overridevirtual

Draw the selected buffer to the output buffer.

Parameters

aBufferHandle is the handle of the buffer to be drawn.

Implements KIGFX::COMPOSITOR.

Definition at line 168 of file cairo_compositor.cpp.

References m_buffers, m_mainContext, m_matrix, and usedBuffers().

◆ DrawBuffer() [2/2]

void CAIRO_COMPOSITOR::DrawBuffer	(	unsigned int	aSourceHandle,
		unsigned int	aDestHandle,
		cairo_operator_t	op
	)

Paints source to destination using the cairo operator.

Useful for differential mode.

Parameters

aSourceHandle	Source buffer to paint
aDestHandle	Destination buffer to paint on to
op	Painting operation

Definition at line 145 of file cairo_compositor.cpp.

References m_buffers, m_mainContext, m_matrix, and usedBuffers().

◆ GetAntialiasingMode()

CAIRO_ANTIALIASING_MODE KIGFX::CAIRO_COMPOSITOR::GetAntialiasingMode ( ) const

inline

Definition at line 90 of file cairo_compositor.h.

References KIGFX::FAST, KIGFX::GOOD, m_currentAntialiasingMode, and KIGFX::NONE.

◆ GetBuffer()

virtual unsigned int KIGFX::CAIRO_COMPOSITOR::GetBuffer ( ) const

inlineoverridevirtual

Return currently used buffer handle.

Returns: Currently used buffer handle.

Implements KIGFX::COMPOSITOR.

Definition at line 60 of file cairo_compositor.h.

References m_current.

◆ Initialize()

void CAIRO_COMPOSITOR::Initialize ( )

overridevirtual

Perform primary initialization, necessary to use the object.

Implements KIGFX::COMPOSITOR.

Definition at line 57 of file cairo_compositor.cpp.

◆ Present()

void CAIRO_COMPOSITOR::Present ( )

overridevirtual

Call this to present the output buffer to the screen.

Implements KIGFX::COMPOSITOR.

Definition at line 186 of file cairo_compositor.cpp.

◆ Resize()

void CAIRO_COMPOSITOR::Resize	(	unsigned int	aWidth,
		unsigned int	aHeight
	)

overridevirtual

Clear the state of COMPOSITOR, so it has to be reinitialized again with the new dimensions.

Parameters

aWidth	is the framebuffer width (in pixels).
aHeight	is the framebuffer height (in pixels).

Implements KIGFX::COMPOSITOR.

Definition at line 76 of file cairo_compositor.cpp.

References clean(), m_bufferSize, KIGFX::COMPOSITOR::m_height, m_stride, and KIGFX::COMPOSITOR::m_width.

◆ SetAntialiasingMode()

void CAIRO_COMPOSITOR::SetAntialiasingMode ( CAIRO_ANTIALIASING_MODE aMode )

Definition at line 63 of file cairo_compositor.cpp.

References clean(), KIGFX::FAST, KIGFX::GOOD, and m_currentAntialiasingMode.

◆ SetBuffer()

void CAIRO_COMPOSITOR::SetBuffer ( unsigned int aBufferHandle )

overridevirtual

Set the selected buffer as the rendering target.

All the following drawing functions are going to be rendered in the selected buffer.

Parameters

aBufferHandle is the handle of the buffer or 0 in case of rendering directly to the display.

Implements KIGFX::COMPOSITOR.

Definition at line 118 of file cairo_compositor.cpp.

References m_buffers, m_current, m_currentContext, m_matrix, and usedBuffers().

◆ SetMainContext()

virtual void KIGFX::CAIRO_COMPOSITOR::SetMainContext ( cairo_t * aMainContext )

inlinevirtual

Set a context to be treated as the main context (ie.

as a target of buffers rendering and as a source of settings for newly created buffers).

Parameters

aMainContext is the context that should be treated as the main one.

Definition at line 109 of file cairo_compositor.h.

References m_mainContext, and m_matrix.

◆ usedBuffers()

unsigned int KIGFX::CAIRO_COMPOSITOR::usedBuffers ( )

inlineprotected

Return number of currently used buffers.

Definition at line 124 of file cairo_compositor.h.

References m_buffers.

Referenced by CreateBuffer(), DrawBuffer(), and SetBuffer().

Member Data Documentation

◆ m_buffers

CAIRO_BUFFERS KIGFX::CAIRO_COMPOSITOR::m_buffers

protected

Stores information about initialized buffers.

Definition at line 150 of file cairo_compositor.h.

Referenced by clean(), ClearBuffer(), CreateBuffer(), DrawBuffer(), SetBuffer(), and usedBuffers().

◆ m_bufferSize

unsigned int KIGFX::CAIRO_COMPOSITOR::m_bufferSize

protected

Amount of memory needed to store a buffer.

Definition at line 153 of file cairo_compositor.h.

Referenced by CAIRO_COMPOSITOR(), ClearBuffer(), CreateBuffer(), and Resize().

◆ m_current

unsigned int KIGFX::CAIRO_COMPOSITOR::m_current

protected

Currently used buffer handle.

Definition at line 137 of file cairo_compositor.h.

Referenced by ClearBuffer(), GetBuffer(), and SetBuffer().

◆ m_currentAntialiasingMode

cairo_antialias_t KIGFX::CAIRO_COMPOSITOR::m_currentAntialiasingMode

protected

Definition at line 155 of file cairo_compositor.h.

Referenced by CreateBuffer(), GetAntialiasingMode(), and SetAntialiasingMode().

◆ m_currentContext

cairo_t** KIGFX::CAIRO_COMPOSITOR::m_currentContext

protected

Pointer to the current context, so it can be changed.

Definition at line 141 of file cairo_compositor.h.

Referenced by SetBuffer().

◆ m_height

unsigned int KIGFX::COMPOSITOR::m_height

protectedinherited

Height of the buffer (in pixels)

Definition at line 113 of file compositor.h.

Referenced by CreateBuffer(), KIGFX::OPENGL_COMPOSITOR::GetScreenSize(), Resize(), and KIGFX::OPENGL_COMPOSITOR::Resize().

◆ m_mainContext

cairo_t* KIGFX::CAIRO_COMPOSITOR::m_mainContext

protected

Rendering target used for compositing (the main display)

Definition at line 144 of file cairo_compositor.h.

Referenced by CreateBuffer(), DrawBuffer(), and SetMainContext().

◆ m_matrix

cairo_matrix_t KIGFX::CAIRO_COMPOSITOR::m_matrix

protected

Transformation matrix.

Definition at line 147 of file cairo_compositor.h.

Referenced by CAIRO_COMPOSITOR(), CreateBuffer(), DrawBuffer(), SetBuffer(), and SetMainContext().

◆ m_stride

unsigned int KIGFX::CAIRO_COMPOSITOR::m_stride

protected

Stride to use given the desired format and width.

Definition at line 152 of file cairo_compositor.h.

Referenced by CAIRO_COMPOSITOR(), CreateBuffer(), and Resize().

◆ m_width

unsigned int KIGFX::COMPOSITOR::m_width

protectedinherited

Width of the buffer (in pixels)

Definition at line 112 of file compositor.h.

Referenced by CreateBuffer(), KIGFX::OPENGL_COMPOSITOR::GetScreenSize(), Resize(), and KIGFX::OPENGL_COMPOSITOR::Resize().

The documentation for this class was generated from the following files:

Classes

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

◆ BitmapPtr

◆ CAIRO_BUFFERS

Constructor & Destructor Documentation

◆ CAIRO_COMPOSITOR()

◆ ~CAIRO_COMPOSITOR()

Member Function Documentation

◆ Begin()

◆ clean()

◆ ClearBuffer()

◆ CreateBuffer()

◆ DrawBuffer() [1/2]

◆ DrawBuffer() [2/2]

◆ GetAntialiasingMode()

◆ GetBuffer()

◆ Initialize()

◆ Present()

◆ Resize()

◆ SetAntialiasingMode()

◆ SetBuffer()

◆ SetMainContext()

◆ usedBuffers()

Member Data Documentation

◆ m_buffers

◆ m_bufferSize

◆ m_current

◆ m_currentAntialiasingMode

◆ m_currentContext

◆ m_height

◆ m_mainContext

◆ m_matrix

◆ m_stride

◆ m_width