Pixel Class Reference

#include <pixel.h>

Public Member Functions
	Pixel () ROLAND_DELETE~Pixel() ROLAND_DELETE inline static const Color get(SDL_Surface *surface
	SDL_LockSurface (surface)
	switch (bpp)
	SDL_GetRGBA (color, surface->format,&r,&g,&b,&a)
	SDL_UnlockSurface (surface)
return	Color (r, g, b, a)

Static Public Member Functions
static void	put (SDL_Surface *surface, Sint32 x, Sint32 y, const Color &color)
static Uint32	alpha32 (Uint32 src, Uint32 dst, Uint8 a)
static Uint16	alpha16 (Uint16 src, Uint16 dst, Uint8 a, const SDL_PixelFormat *f)
static void	putAlpha (SDL_Surface *surface, Sint32 x, Sint32 y, const Color &color)

Public Attributes
Sint16	x
Sint16 Sint16	y
Uint8 *	p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp
Uint32	color = 0
Uint8	r
Uint8	g
Uint8	b
Uint8	a

Constructor & Destructor Documentation

Pixel

(

)

const

Checks a pixels color of an SDL_Surface.

Parameters

surface	an SDL_Surface where to check for a pixel color.
x	the x coordinate on the surface.
y	the y coordinate on the surface.

Returns

a color of a pixel.

Member Function Documentation

static Uint16 alpha16 ( Uint16  src, Uint16  dst, Uint8  a, const SDL_PixelFormat *  f  )

inlinestatic

Blends two 16 bit colors together.

Parameters

src	the source color.
dst	the destination color.
a	alpha.

References Pixel::a, Pixel::b, Pixel::g, and Pixel::r.

Referenced by Pixel::putAlpha().

static Uint32 alpha32 ( Uint32  src, Uint32  dst, Uint8  a  )

inlinestatic

Blends two 32 bit colors together.

Parameters

src	the source color.
dst	the destination color.
a	alpha.

References Pixel::a, Pixel::b, Pixel::g, and Pixel::r.

Referenced by CanvasStd::hLine(), Pixel::putAlpha(), and CanvasStd::vLine().

return Color	(	r	,
		g	,
		b	,
		a
	)

static void put ( SDL_Surface *  surface, Sint32  x, Sint32  y, const Color &  color  )

inlinestatic

Puts a pixel on an SDL_Surface.

Parameters

x	the x coordinate on the surface.
y	the y coordinate on the surface.
color	the color the pixel should be in.

References Color::b(), Color::g(), Pixel::p, Color::r(), Pixel::SDL_LockSurface(), and Pixel::SDL_UnlockSurface().

Referenced by CanvasStd::clearClipRect(), Image::genTexture(), and CanvasStd::line().

static void putAlpha ( SDL_Surface *  surface, Sint32  x, Sint32  y, const Color &  color  )

inlinestatic

Puts a pixel on an SDL_Surface with alpha

Parameters

x	the x coordinate on the surface.
y	the y coordinate on the surface.
color	the color the pixel should be in.

References Color::a(), Pixel::alpha16(), Pixel::alpha32(), Color::b(), Pixel::b, Color::g(), Pixel::g, Pixel::p, Color::r(), Pixel::r, Pixel::SDL_LockSurface(), and Pixel::SDL_UnlockSurface().

Referenced by CanvasStd::clearClipRect(), and CanvasStd::line().

SDL_GetRGBA	(	color	,
		surface->	format,
		&	r,
		&	g,
		&	b,
		&	a
	)

SDL_LockSurface

(

surface

)

Referenced by Pixel::put(), and Pixel::putAlpha().

SDL_UnlockSurface

(

surface

)

Referenced by Pixel::put(), and Pixel::putAlpha().

switch ( bpp  )

inline

References Pixel::color, and Pixel::p.

Member Data Documentation

Uint8 a

Referenced by Pixel::alpha16(), and Pixel::alpha32().

Uint8 b

Referenced by Pixel::alpha16(), Pixel::alpha32(), and Pixel::putAlpha().

Uint32 color = 0

Referenced by Pixel::switch().

Uint8 g

Referenced by Pixel::alpha16(), Pixel::alpha32(), and Pixel::putAlpha().

Uint8* p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp

Referenced by Pixel::put(), Pixel::putAlpha(), and Pixel::switch().

Uint8 r

Referenced by Pixel::alpha16(), Pixel::alpha32(), and Pixel::putAlpha().

Sint16 x

Sint16 Sint16 y

Initial value:

{
            Sint32  bpp = surface->format->BytesPerPixel

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

• pixel.h