Static functions to manage palettes. More...

Classes
struct	RGBColorList

Static Public Member Functions
static void	FromRGB15 (RGBWord8_t *pOutput, uint_t uInput)
	Convert 15 bit color to 24 bit color.

static void	FromRGB15 (RGBAWord8_t *pOutput, uint_t uInput)
	Convert 15 bit color to 32 bit color.

static void	FromRGB1555 (RGBAWord8_t *pOutput, uint_t uInput)
	Convert 1:5:5:5 bit color to 32 bit color.

static void	FromRGB16 (RGBWord8_t *pOutput, uint_t uInput)
	Convert 16 bit color to 24 bit color.

static void	FromRGB16 (RGBAWord8_t *pOutput, uint_t uInput)
	Convert 16 bit color to 32 bit color.

static uint_t	ToRGB15 (const RGBWord8_t *pInput)
	Convert 24 bit color to 15 bit color.

static uint_t	ToRGB15 (const RGBAWord8_t *pInput)
	Convert 32 bit color to 15 bit color.

static uint_t	ToRGB16 (const RGBWord8_t *pInput)
	Convert 24 bit color to 16 bit color.

static uint_t	ToRGB16 (const RGBAWord8_t *pInput)
	Convert 32 bit color to 16 bit color.

static uint_t	ToDisplay (const RGBWord8_t pInput, const Display pDisplay)
	Convert 24 bit color to current depth.

static uint_t	ToDisplay (uint_t uRed, uint_t uGreen, uint_t uBlue, const Display *pDisplay)
	Convert 24 bit color to current depth.

static uint_t	ToDisplay (uint32_t uRGBColor, const Display *pDisplay)
	Convert 24 bit packed color to current depth.

static uint_t	FindColorIndex (const uint8_t *pPalette, uint_t uRed, uint_t uGreen, uint_t uBlue, uint_t uCount)
	Lookup a color in an 8 bit palette.

static void	Make8BitLookupTable (uint_t pOutput, const uint8_t pInput, const Display *pDisplay)
	Convert an 8 bit palette to a true color array.

static void	Make8BitLookupTable (uint_t pOutput, RezFile pInput, uint_t uRezNum, const Display *pDisplay)
	Convert an 8 bit palette to a true color array.

static void	MakeRemapLookup (uint8_t pOutput, const uint8_t pNewPalette, const uint8_t *pOldPalette)
	Create an 8 bit remap table.

static void	MakeRemapLookupMasked (uint8_t pOutput, const uint8_t pNewPalette, const uint8_t *pOldPalette)
	Create an 8 bit remap table.

static void	MakeColorMasks (uint8_t *pOutput, uint_t uMaskIndex)
	Create an 8 bit mask table.

static void	MakeFadeLookup (uint8_t pOutput, const uint8_t pInput, uint_t uRedAdjust, uint_t uGreenAdjust, uint_t uBlueAdjust)
	Create a remap table to brighten or darken a shape.

Detailed Description

Static functions to manage palettes.

This is a set of subroutines that will take a 256 color, RGB triplet palette and manage the colors within.

Member Function Documentation

◆ FindColorIndex()

uint_t BURGER_API Burger::Palette::FindColorIndex	(	const uint8_t *	pPalette,
		uint_t	uRed,
		uint_t	uGreen,
		uint_t	uBlue,
		uint_t	uCount )

static

Lookup a color in an 8 bit palette.

Given an 8 bit red, green and blue value, return the pixel value that is the most closest match.

The palette is an array of bytes that is sizeof(uint8_t)*uCount*3

Parameters

pPalette	Pointer to an 8 bit palette to map to (768 bytes)
uRed	Red value (0-255)
uGreen	Green value (0-255)
uBlue	Blue value (0-255)
uCount	Number of colors in the palette (The array byte size is this value multiplied by 3)

Returns: Color index that is the closest match. (0-(Count-1))

See also: ToDisplay(uint32_t,const Display *) or ToDisplay(uint_t,uint_t,uint_t,const Display *)

◆ FromRGB15() [1/2]

void BURGER_API Burger::Palette::FromRGB15	(	RGBAWord8_t *	pOutput,
		uint_t	uInput )

static

Convert 15 bit color to 32 bit color.

Given a 15 bit RGB pixel value, convert it to a 32 bit RGB quad. Alpha will be set to 255

Parameters

pOutput	Pointer to the output buffer.
uInput	15 bit RGB value in 5:5:5 format.

See also: FromRGB16(RGBAWord8_t *,uint_t), FromRGB15(RGBWord8_t *,uint_t), Renderer::RGB5ToRGB8Table

◆ FromRGB15() [2/2]

void BURGER_API Burger::Palette::FromRGB15	(	RGBWord8_t *	pOutput,
		uint_t	uInput )

static

Convert 15 bit color to 24 bit color.

Given a 15 bit RGB pixel value, convert it to a 24 bit RGB triplet

Parameters

pOutput	Pointer to the output buffer.
uInput	15 bit RGB value in 5:5:5 format.

See also: FromRGB15(RGBAWord8_t *,uint_t), FromRGB16(RGBWord8_t *,uint_t), Renderer::RGB5ToRGB8Table

◆ FromRGB1555()

void BURGER_API Burger::Palette::FromRGB1555	(	RGBAWord8_t *	pOutput,
		uint_t	uInput )

static

Convert 1:5:5:5 bit color to 32 bit color.

Given a 1:5:5:5 bit RGB pixel value, convert it to a 32 bit RGB quad. Alpha will be set to 0 or 255

Parameters

pOutput	Pointer to the output buffer.
uInput	16 bit RGB value in 1:5:5:5 format.

See also: FromRGB16(RGBAWord8_t *,uint_t), FromRGB15(RGBWord8_t *,uint_t), Renderer::RGB5ToRGB8Table

◆ FromRGB16() [1/2]

void BURGER_API Burger::Palette::FromRGB16	(	RGBAWord8_t *	pOutput,
		uint_t	uInput )

static

Convert 16 bit color to 32 bit color.

Given a 16 bit RGB pixel value, convert it to a 32 bit RGB quad. Alpha will be set to 255

Parameters

pOutput	Pointer to the output buffer.
uInput	16 bit RGB value in 5:6:5 format.

See also: FromRGB15(RGBAWord8_t *,uint_t), FromRGB16(RGBWord8_t *,uint_t), Renderer::RGB5ToRGB8Table, Renderer::RGB6ToRGB8Table

◆ FromRGB16() [2/2]

void BURGER_API Burger::Palette::FromRGB16	(	RGBWord8_t *	pOutput,
		uint_t	uInput )

static

Convert 16 bit color to 24 bit color.

Given a 16 bit RGB pixel value, convert it to a 24 bit RGB triplet

Parameters

pOutput	Pointer to the output buffer.
uInput	16 bit RGB value in 5:6:5 format.

See also: FromRGB15(RGBWord8_t *,uint_t), FromRGB16(RGBAWord8_t *,uint_t), Renderer::RGB5ToRGB8Table, Renderer::RGB6ToRGB8Table

◆ Make8BitLookupTable() [1/2]

void BURGER_API Burger::Palette::Make8BitLookupTable	(	uint_t *	pOutput,
		const uint8_t *	pInput,
		const Display *	pDisplay )

static

Convert an 8 bit palette to a true color array.

Given an 8 bit palette (256 RGB values) create a color lookup table for drawing to a screen using this palette

Parameters

pOutput	Pointer to an array of 256 Words
pInput	Pointer to an array of 256 3 byte RGB triplets
pDisplay	Display context to determine the depth and base palette

See also: Make8BitLookupTable(uint_t *,RezFile *,uint_t,const Display *), ToDisplay(const RGBWord8_t *,const Display *)

◆ Make8BitLookupTable() [2/2]

void BURGER_API Burger::Palette::Make8BitLookupTable	(	uint_t *	pOutput,
		Burger::RezFile *	pInput,
		uint_t	uRezNum,
		const Display *	pDisplay )

static

Convert an 8 bit palette to a true color array.

Given an 8 bit palette (256 RGB values) create a 16 bit color lookup table for drawing to a screen using this palette. The palette is read in from a resource file. The resource is released on exit.

Parameters

pOutput	Pointer to an array of 256 Words
pInput	Pointer to the reference of the resource file
uRezNum	Which resource ID to load
pDisplay	Display context to determine the depth and base palette

See also: Make8BitLookupTable(uint_t *,const uint8_t *,const Display *), ToDisplay(const RGBWord8_t *,const Display *)

◆ MakeColorMasks()

void BURGER_API Burger::Palette::MakeColorMasks	(	uint8_t *	pOutput,
		uint_t	uMaskIndex )

static

Create an 8 bit mask table.

Create a pixel mask table to make the MaskColor index transparent. This table will have the first 256 bytes containing the value to 'OR' with. The second 256 bytes will be the mask value.

What effectively occurs is that the first 256 bytes are 0-255 in that order and the last 256 bytes are 0. The mask color will have a mask of 255 and a color of zero. This is to create a table to draw masked shapes without having to incur branch penalties on processors that have problems with mispredicted branches.

Parameters

pOutput	Pointer to an array of 512 bytes
uMaskIndex	Color index to mask as invisible (0-255) or (-1) for not used

See also: MakeRemapLookup()

◆ MakeFadeLookup()

void BURGER_API Burger::Palette::MakeFadeLookup	(	uint8_t *	pOutput,
		const uint8_t *	pInput,
		uint_t	uRedAdjust,
		uint_t	uGreenAdjust,
		uint_t	uBlueAdjust )

static

Create a remap table to brighten or darken a shape.

If you wish to remap an 8 bit image by altering the brightness of one or more colors, this routine will create a remap table based on the new brightness. Give the palette for the shape and pass the red, green and blue scaling adjustments in percentage points. 100 is treated as 1.0, 50 is .5 and 200 is 2.0 intensity

Parameters

pOutput	Pointer to an array of 256 bytes for remap table
pInput	Pointer to an 8 bit palette (768 bytes)
uRedAdjust	Red percentage adjust (0-1000)
uGreenAdjust	Green percentage adjust (0-1000)
uBlueAdjust	Blue percentage adjust (0-1000)

See also: MakeRemapLookup()

◆ MakeRemapLookup()

void BURGER_API Burger::Palette::MakeRemapLookup	(	uint8_t *	pOutput,
		const uint8_t *	pNewPalette,
		const uint8_t *	pOldPalette )

static

Create an 8 bit remap table.

Create a pixel data conversion table by taking the a source palette and trying to find the best match in a destination palette. The returned data will allow you to quickly color map a 256 color image onto any palette.

Parameters

pOutput	Pointer to an array of 256 bytes
pNewPalette	Pointer to a palette of 256 colors (768 bytes) to map to
pOldPalette	Pointer to the palette of the shape (768 bytes) to map from

See also: FindColorIndex(), MakeRemapLookupMasked()

◆ MakeRemapLookupMasked()

void BURGER_API Burger::Palette::MakeRemapLookupMasked	(	uint8_t *	pOutput,
		const uint8_t *	pNewPalette,
		const uint8_t *	pOldPalette )

static

Create an 8 bit remap table.

Create a pixel data conversion table by taking the a source palette and trying to find the best match in a destination palette. The returned data will allow you to quickly color map a 256 color image onto any palette.

Note: This will not alter color #0 and will not map to either color #0 or color #255. Color #255 will be remapped to an equivalent color.

Parameters

pOutput	Pointer to an array of 256 bytes
pNewPalette	Pointer to a palette of 256 colors (768 bytes) to map to
pOldPalette	Pointer to the palette of the shape (768 bytes) to map from

See also: FindColorIndex(), MakeRemapLookup()

◆ ToDisplay() [1/3]

uint_t BURGER_API Burger::Palette::ToDisplay	(	const RGBWord8_t *	pInput,
		const Display *	pDisplay )

static

Convert 24 bit color to current depth.

Given a 24 bit RGB triplet, convert it to a pixel value of the current depth. For 32 bit destination pixels depths, the alpha is set to 255

Note: This function can only return an 8, 15, 16, 24 or 32 bit quantity. Any other depth will force a return of 0.

Parameters

pInput	Pointer to a 24 bit RGB triplet
pDisplay	Display context to determine the depth and base palette

Returns: 24 bit color value as 15, 16 or 8 bit color

See also: ToRGB16(), ToRGB15(), FindColorIndex(), ToDisplay(uint_t,uint_t,uint_t,const Display *)

◆ ToDisplay() [2/3]

uint_t BURGER_API Burger::Palette::ToDisplay	(	uint32_t	uRGBColor,
		const Display *	pDisplay )

static

Convert 24 bit packed color to current depth.

Given a red/green/blue uint32_t value, convert it to a pixel value of the current depth.

If the input value has an alpha component, it's ignored

For 32 bit destinations the alpha is set to 255

Note: This function can only return an 8, 15, 16, 24 or 32 bit quantity. Any other value will force a return of 0.

Parameters

uRGBColor	Value of red ((0-255)<<16) + Green ((0-255)<<8) + Blue (0-255)
pDisplay	Display context to determine the depth and base palette

Returns: Color value as 8, 15, 16, 24 or 32 bit color

See also: ToRGB16(), ToRGB15(), FindColorIndex(), ToDisplay(uint_t,uint_t,uint_t,const Display *)

◆ ToDisplay() [3/3]

uint_t BURGER_API Burger::Palette::ToDisplay	(	uint_t	uRed,
		uint_t	uGreen,
		uint_t	uBlue,
		const Display *	pDisplay )

static

Convert 24 bit color to current depth.

Given a red, green and blue value, convert it to a pixel value of the current depth. For 32 bit destinations the alpha is set to 255

Note: This function can only return an 8, 15, 16, 24 or 32 bit quantity. Any other value will force a return of 0.

Parameters

uRed	Value of red (0-255)
uGreen	Value of green (0-255)
uBlue	Value of blue (0-255)
pDisplay	Display context to determine the depth and base palette

Returns: Color value as 8, 15, 16, 24 or 32 bit color

See also: ToRGB16(), ToRGB15(), FindColorIndex(), ToDisplay(uint32_t,const Display *)

◆ ToRGB15() [1/2]

static uint_t Burger::Palette::ToRGB15 ( const RGBAWord8_t * pInput )

inlinestatic

Convert 32 bit color to 15 bit color.

Given a 32 bit RGBA quad stored as an array of bytes organized as Red, Green, Blue and Alpha convert it to a 15 bit RGB pixel value. Alpha is ignored

Parameters

pInput Pointer to a 32 bit RGBA quad

Returns: 32 bit color value as 5:5:5 color

See also: FromRGB15() or ToRGB16()

◆ ToRGB15() [2/2]

uint_t BURGER_API Burger::Palette::ToRGB15 ( const RGBWord8_t * pInput )

static

Convert 24 bit color to 15 bit color.

Given a 24 bit RGB triplet stored as an array of bytes organized as Red, Green and Blue, convert it to a 15 bit RGB pixel value

Parameters

pInput Pointer to a 24 bit RGB triplet

Returns: 24 bit color value as 5:5:5 color

See also: FromRGB15() or ToRGB16()

◆ ToRGB16() [1/2]

static uint_t Burger::Palette::ToRGB16 ( const RGBAWord8_t * pInput )

inlinestatic

Convert 32 bit color to 16 bit color.

Given a 32 bit RGBA quad stored as an array of bytes organized as Red, Green, Blue and Alpha convert it to a 16 bit RGB pixel value. Alpha is ignored

Parameters

pInput Pointer to a 32 bit RGBA quad

Returns: 32 bit color value as 5:6:5 color

See also: FromRGB16() or ToRGB15()

◆ ToRGB16() [2/2]

uint_t BURGER_API Burger::Palette::ToRGB16 ( const RGBWord8_t * pInput )

static

Convert 24 bit color to 16 bit color.

Given a 24 bit RGB triplet stored as an array of bytes organized as Red, Green and Blue, convert it to a 16 bit RGB pixel value

Parameters

pInput Pointer to a 24 bit RGB triplet

Returns: 24 bit color value as 5:6:5 color

See also: FromRGB16() or ToRGB15()

Classes

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ FindColorIndex()

◆ FromRGB15() [1/2]

◆ FromRGB15() [2/2]

◆ FromRGB1555()

◆ FromRGB16() [1/2]

◆ FromRGB16() [2/2]

◆ Make8BitLookupTable() [1/2]

◆ Make8BitLookupTable() [2/2]

◆ MakeColorMasks()

◆ MakeFadeLookup()

◆ MakeRemapLookup()

◆ MakeRemapLookupMasked()

◆ ToDisplay() [1/3]

◆ ToDisplay() [2/3]

◆ ToDisplay() [3/3]

◆ ToRGB15() [1/2]

◆ ToRGB15() [2/2]

◆ ToRGB16() [1/2]

◆ ToRGB16() [2/2]