Pixel formats

FourCC values accepted by SGL conversion functions. More...

Macros
#define	SGL_FOURCC(a, b, c, d)
	Creates a DRM/V4L2-compatible FourCC value.
#define	SGL_FOURCC_RGBA   SGL_FOURCC('A', 'B', '2', '4')
	V4L2 RGBA32 / DRM ABGR8888 code; packed bytes R, G, B, A.
#define	SGL_FOURCC_ARGB   SGL_FOURCC('B', 'A', '2', '4')
	V4L2 ARGB32 / DRM BGRA8888 code; packed bytes A, R, G, B.
#define	SGL_FOURCC_BGRA   SGL_FOURCC('A', 'R', '2', '4')
	V4L2 ABGR32 / DRM ARGB8888 code; packed bytes B, G, R, A.
#define	SGL_FOURCC_ABGR   SGL_FOURCC('R', 'A', '2', '4')
	V4L2 BGRA32 / DRM RGBA8888 code; packed bytes A, B, G, R.
#define	SGL_FOURCC_RGB   SGL_FOURCC('R', 'G', 'B', '3')
	V4L2 RGB24 code; packed bytes R, G, B.
#define	SGL_FOURCC_BGR   SGL_FOURCC('B', 'G', 'R', '3')
	V4L2 BGR24 code; packed bytes B, G, R.
#define	SGL_FOURCC_RGBA_PLANAR   SGL_FOURCC('R', 'A', '4', 'P')
	SGL extension; full-resolution planes R, G, B, A.
#define	SGL_FOURCC_ARGB_PLANAR   SGL_FOURCC('A', 'R', '4', 'P')
	SGL extension; full-resolution planes A, R, G, B.
#define	SGL_FOURCC_BGRA_PLANAR   SGL_FOURCC('B', 'A', '4', 'P')
	SGL extension; full-resolution planes B, G, R, A.
#define	SGL_FOURCC_ABGR_PLANAR   SGL_FOURCC('A', 'B', '4', 'P')
	SGL extension; full-resolution planes A, B, G, R.
#define	SGL_FOURCC_RGB_PLANAR   SGL_FOURCC('R', 'G', '3', 'P')
	SGL extension; full-resolution planes R, G, B.
#define	SGL_FOURCC_BGR_PLANAR   SGL_FOURCC('B', 'G', '3', 'P')
	SGL extension; full-resolution planes B, G, R.
#define	SGL_FOURCC_YUV444_PACKED   SGL_FOURCC('Y', 'U', 'V', '3')
	V4L2 YUV24 code; 4:4:4 packed bytes Y, Cb, Cr.
#define	SGL_FOURCC_YUV444_PLANAR   SGL_FOURCC('Y', 'U', '2', '4')
	DRM YUV444 code; 4:4:4 full-resolution planes Y, Cb, Cr.
#define	SGL_FOURCC_YUYV   SGL_FOURCC('Y', 'U', 'Y', 'V')
	DRM/V4L2 YUYV; each two-pixel group is Y0, Cb0, Y1, Cr0.
#define	SGL_FOURCC_YVYU   SGL_FOURCC('Y', 'V', 'Y', 'U')
	DRM/V4L2 YVYU; each two-pixel group is Y0, Cr0, Y1, Cb0.
#define	SGL_FOURCC_UYVY   SGL_FOURCC('U', 'Y', 'V', 'Y')
	DRM/V4L2 UYVY; each two-pixel group is Cb0, Y0, Cr0, Y1.
#define	SGL_FOURCC_VYUY   SGL_FOURCC('V', 'Y', 'U', 'Y')
	DRM/V4L2 VYUY; each two-pixel group is Cr0, Y0, Cb0, Y1.
#define	SGL_FOURCC_YUV422_PLANAR   SGL_FOURCC('Y', 'U', '1', '6')
	DRM YUV422 code; planes Y, Cb, Cr with half-width chroma.
#define	SGL_FOURCC_YUV420_PLANAR   SGL_FOURCC('Y', 'U', '1', '2')
	DRM YUV420 code; planes Y, Cb, Cr with half-size chroma axes.
#define	SGL_FOURCC_NV12   SGL_FOURCC('N', 'V', '1', '2')
	DRM/V4L2 NV12; full Y plane followed by interleaved Cb, Cr 4:2:0.
#define	SGL_FOURCC_NV21   SGL_FOURCC('N', 'V', '2', '1')
	DRM/V4L2 NV21; full Y plane followed by interleaved Cr, Cb 4:2:0.

Detailed Description

FourCC values accepted by SGL conversion functions.

All formats use tightly packed rows. Planar formats store each complete plane contiguously in the documented order. Cb and Cr are also commonly named U and V.

Macro Definition Documentation

SGL_FOURCC

#define SGL_FOURCC	(		a,
			b,
			c,
			d
	)

Value:

    ((sgl_fourcc_t)((sgl_uint8_t)(a)) | \
     ((sgl_fourcc_t)((sgl_uint8_t)(b)) << 8U) | \
     ((sgl_fourcc_t)((sgl_uint8_t)(c)) << 16U) | \
     ((sgl_fourcc_t)((sgl_uint8_t)(d)) << 24U))

Creates a DRM/V4L2-compatible FourCC value.

a occupies bits 7:0, b bits 15:8, c bits 23:16, and d bits 31:24. Casting each character to eight bits prevents sign extension before the shifts.

Definition at line 37 of file sgl-fourcc.h.