#include <stdint.h>

Macros
#define	PIXEL_ALPHA(pixel) (((pixel) >> 24) & 0xFF)

#define	PIXEL_RED(pixel) (((pixel) >> 16) & 0xFF)

#define	PIXEL_GREEN(pixel) (((pixel) >> 8) & 0xFF)

#define	PIXEL_BLUE(pixel) (((pixel) >> 0) & 0xFF)

#define	PIXEL_ARGB(a, r, g, b) (((a) << 24) \| ((r) << 16) \| ((g) << 8) \| ((b) << 0))

#define	PIXEL_BLEND(dest, src)

Typedefs
typedef uint32_t	pixel_t

Macro Definition Documentation

◆ PIXEL_ALPHA

#define PIXEL_ALPHA ( pixel ) (((pixel) >> 24) & 0xFF)

Definition at line 13 of file pixel.h.

◆ PIXEL_ARGB

#define PIXEL_ARGB	(	a,
		r,
		g,
		b
	)	(((a) << 24) \| ((r) << 16) \| ((g) << 8) \| ((b) << 0))

Definition at line 18 of file pixel.h.

◆ PIXEL_BLEND

#define PIXEL_BLEND	(	dest,
		src
	)

Value:

    ({ \
        uint8_t aAlpha = PIXEL_ALPHA(*src); \
        uint8_t bAlpha = PIXEL_ALPHA(*dest); \
        uint8_t alpha = aAlpha + ((bAlpha * (0xFF - aAlpha)) / 0xFF); \
        if (alpha != 0) \
        { \
            *dest = PIXEL_ARGB(alpha, \
                (PIXEL_RED(*src) * aAlpha + PIXEL_RED(*dest) * bAlpha * (0xFF - aAlpha) / 0xFF) / alpha, \
                (PIXEL_GREEN(*src) * aAlpha + PIXEL_GREEN(*dest) * bAlpha * (0xFF - aAlpha) / 0xFF) / alpha, \
                (PIXEL_BLUE(*src) * aAlpha + PIXEL_BLUE(*dest) * bAlpha * (0xFF - aAlpha) / 0xFF) / alpha); \
        } \
        else \
        { \
            *dest = 0; \
        } \
    })

Definition at line 20 of file pixel.h.

◆ PIXEL_BLUE

#define PIXEL_BLUE ( pixel ) (((pixel) >> 0) & 0xFF)

Definition at line 16 of file pixel.h.

◆ PIXEL_GREEN

#define PIXEL_GREEN ( pixel ) (((pixel) >> 8) & 0xFF)

Definition at line 15 of file pixel.h.

◆ PIXEL_RED

#define PIXEL_RED ( pixel ) (((pixel) >> 16) & 0xFF)

Definition at line 14 of file pixel.h.

Typedef Documentation

◆ pixel_t

typedef uint32_t pixel_t

Definition at line 11 of file pixel.h.

Macros

Typedefs