#include <cscaledbitmap.hxx>

Inheritance diagram for NXWidgets::CScaledBitmap:

Public Member Functions
	CScaledBitmap (IBitmap *bitmap, struct nxgl_size_s &newSize)

	~CScaledBitmap (void)

const uint8_t	getColorFormat (void) const

const uint8_t	getBitsPerPixel (void) const

const nxgl_coord_t	getWidth (void) const

const nxgl_coord_t	getHeight (void) const

const size_t	getStride (void) const

void	setSelected (bool selected)

bool	getRun (nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width, FAR void *data)

Public Member Functions inherited from NXWidgets::IBitmap
virtual	~IBitmap (void)

Protected Member Functions
bool	cacheRows (unsigned int row)

bool	scaleColor (FAR const struct rgbcolor_s &incolor1, FAR const struct rgbcolor_s &incolor2, b16_t fraction, FAR struct rgbcolor_s &outcolor)

bool	rowColor (FAR uint8_t *row, b16_t column, FAR struct rgbcolor_s &outcolor)

	CScaledBitmap (const CScaledBitmap &bitmap)

Protected Attributes
FAR IBitmap *	m_bitmap

struct nxgl_size_s	m_size

FAR uint8_t *	m_rowCache [2]

unsigned int	m_row

b16_t	m_xScale

b16_t	m_yScale

Detailed Description

Class for scaling layer for any bitmap that inherits from IBitMap

Definition at line 72 of file cscaledbitmap.hxx.

Constructor & Destructor Documentation

◆ CScaledBitmap() [1/2]

NXWidgets::CScaledBitmap::CScaledBitmap ( const CScaledBitmap & bitmap )

inlineprotected

Copy constructor is protected to prevent usage.

Definition at line 121 of file cscaledbitmap.hxx.

◆ CScaledBitmap() [2/2]

CScaledBitmap::CScaledBitmap	(	IBitmap *	bitmap,
		struct nxgl_size_s &	newSize
	)

Constructor.

Parameters

bitmap The bitmap structure being scaled. The new, scaled size of the image

Definition at line 67 of file cscaledbitmap.cxx.

◆ ~CScaledBitmap()

CScaledBitmap::~CScaledBitmap ( void )

Destructor.

Definition at line 102 of file cscaledbitmap.cxx.

Member Function Documentation

◆ cacheRows()

bool CScaledBitmap::cacheRows ( unsigned int row )

protected

Read two rows into the row cache

Parameters

row	- The row number of the first row to cache

Definition at line 363 of file cscaledbitmap.cxx.

◆ getBitsPerPixel()

const uint8_t CScaledBitmap::getBitsPerPixel ( void ) const

virtual

Get the bitmap's color format.

Returns: The bitmap's pixel depth.

Get the bitmap's color format.

Returns: The bitmap's color format.

Implements NXWidgets::IBitmap.

Definition at line 141 of file cscaledbitmap.cxx.

◆ getColorFormat()

const uint8_t CScaledBitmap::getColorFormat ( void ) const

virtual

Get the bitmap's color format.

Returns: The bitmap's color format.

Get the bitmap's color format.

Returns: The bitmap's width.

Implements NXWidgets::IBitmap.

Definition at line 130 of file cscaledbitmap.cxx.

◆ getHeight()

const nxgl_coord_t CScaledBitmap::getHeight ( void ) const

virtual

Get the bitmap's height (in rows).

Returns: The bitmap's height (in rows).

Implements NXWidgets::IBitmap.

Definition at line 163 of file cscaledbitmap.cxx.

◆ getRun()

bool CScaledBitmap::getRun	(	nxgl_coord_t	x,
		nxgl_coord_t	y,
		nxgl_coord_t	width,
		FAR void *	data
	)

virtual

Get one row from the bit map image.

Parameters

x	The offset into the row to get
y	The row number to get
width	The number of pixels to get from the row
data	The memory location provided by the caller in which to return the data. This should be at least (getWidth()*getBitsPerPixl() + 7)/8 bytes in length and properly aligned for the pixel color format.
True	if the run was returned successfully.

Get one row from the bit map image.

REVISIT: This algorithm is really intended to expand images. Hence, for example, interpolation is between row and row+1 and column and column+1 in the original, unscaled image. You would the interpolation differently if you really wanted to sub-sample well.

Parameters

x	The offset into the row to get
y	The row number to get
width	The number of pixels to get from the row
data	The memory location provided by the caller in which to return the data. This should be at least (getWidth()*getBitsPerPixl() + 7)/8 bytes in length and properly aligned for the pixel color format.
True	if the run was returned successfully.

Implements NXWidgets::IBitmap.

Definition at line 197 of file cscaledbitmap.cxx.

◆ getStride()

const size_t CScaledBitmap::getStride ( void ) const

virtual

Get the bitmap's width (in bytes).

Returns: The bitmap's width (in bytes).

Implements NXWidgets::IBitmap.

Definition at line 174 of file cscaledbitmap.cxx.

◆ getWidth()

const nxgl_coord_t CScaledBitmap::getWidth ( void ) const

virtual

Get the bitmap's width (in pixels/columns).

Returns: The bitmap's width (in pixels/columns).

Get the bitmap's width (in pixels/columns).

Returns: The bitmap's pixel depth.

Implements NXWidgets::IBitmap.

Definition at line 152 of file cscaledbitmap.cxx.

◆ rowColor()

bool CScaledBitmap::rowColor	(	FAR uint8_t *	row,
		b16_t	column,
		FAR struct rgbcolor_s &	outcolor
	)

protected

Given an image row and a non-integer column offset, return the interpolated RGB color value corresponding to that position

Parameters

row	- The pointer to the row in the row cache to use
column	- The non-integer column offset
outcolor	- The returned, interpolated color

Definition at line 490 of file cscaledbitmap.cxx.

◆ scaleColor()

bool CScaledBitmap::scaleColor	(	FAR const struct rgbcolor_s &	incolor1,
		FAR const struct rgbcolor_s &	incolor2,
		b16_t	fraction,
		FAR struct rgbcolor_s &	outcolor
	)

protected

Given an two RGB colors and a fractional value, return the scaled value between the two colors.

Parameters

incolor1	- The first color to be used
incolor2	- The second color to be used
fraction	- The fractional value
outcolor	- The returned, scaled color

Definition at line 446 of file cscaledbitmap.cxx.

◆ setSelected()

void NXWidgets::CScaledBitmap::setSelected ( bool selected )

inlinevirtual

Use the colors associated with a selected image.

Parameters

selected. true: Use colors for a selected widget, false: Use normal (default) colors.

Implements NXWidgets::IBitmap.

Definition at line 187 of file cscaledbitmap.hxx.

Member Data Documentation

◆ m_bitmap

FAR IBitmap* NXWidgets::CScaledBitmap::m_bitmap

protected

The bitmap that is being scaled

Definition at line 75 of file cscaledbitmap.hxx.

◆ m_row

unsigned int NXWidgets::CScaledBitmap::m_row

protected

Row number of the first cached row

Definition at line 78 of file cscaledbitmap.hxx.

◆ m_rowCache

FAR uint8_t* NXWidgets::CScaledBitmap::m_rowCache[2]

protected

Two cached rows of the image

Definition at line 77 of file cscaledbitmap.hxx.

◆ m_size

struct nxgl_size_s NXWidgets::CScaledBitmap::m_size

protected

Scaled size of the image

Definition at line 76 of file cscaledbitmap.hxx.

◆ m_xScale

b16_t NXWidgets::CScaledBitmap::m_xScale

protected

X scale factor

Definition at line 79 of file cscaledbitmap.hxx.

◆ m_yScale

b16_t NXWidgets::CScaledBitmap::m_yScale

protected

Y scale factor

Definition at line 80 of file cscaledbitmap.hxx.

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ CScaledBitmap() [1/2]

◆ CScaledBitmap() [2/2]

◆ ~CScaledBitmap()

Member Function Documentation

◆ cacheRows()

◆ getBitsPerPixel()

◆ getColorFormat()

◆ getHeight()

◆ getRun()

◆ getStride()

◆ getWidth()

◆ rowColor()

◆ scaleColor()

◆ setSelected()

Member Data Documentation

◆ m_bitmap

◆ m_row

◆ m_rowCache

◆ m_size

◆ m_xScale

◆ m_yScale