This is a follow-up to: http://lists.freedesktop.org/archives/mesa-dev/2014-March/055742.html Add formats meant to convey a "compute" dimension when a DRM fourcc format is needed for dma_buf interop (EGL, OpenCL). Intended FOURCC format: ('T',<num_elements>,<type>,<size_element>). - <num_elements>: number of elements in the tuple. Range: [0..3]. - <type>: type of each element. Values: {'_','I','U','F'}, respectively for normalized to [0..1] range, signed integers, unsigned integers, floating-point. - <size_element>: size of the element. Values: {1, 2, 4, 8}. All entities are represented in native-endian byte-order in memory. For example, 'T2F4' format would represent the (float, float) tuple where elements are stored in little-endian byte-order on x86. Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@xxxxxxxxx> --- include/drm/drm_fourcc.h | 78 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 85facb0..26a2ca8 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -127,4 +127,82 @@ #define DRM_FORMAT_YUV444 fourcc_code('Y', 'U', '2', '4') /* non-subsampled Cb (1) and Cr (2) planes */ #define DRM_FORMAT_YVU444 fourcc_code('Y', 'V', '2', '4') /* non-subsampled Cr (1) and Cb (2) planes */ +/** + * \defgroup api_drm_tuples Compute formats (tuples) + * + * The following formats are not meant for display. Rather, they are + * meant to convey a "compute" dimension when a DRM fourcc format is + * needed for dma_buf interop (EGL, OpenCL). + * + * Intended FOURCC format: ('T',<num_elements>,<type>,<size_element>). + * - <num_elements>: number of elements in the tuple. Range: [0..3]. + * - <type>: type of each element. Values: {'_','I','U','F'}, + * respectively for normalized to [0..1] range, signed integers, + * unsigned integers, floating-point. + * - <size_element>: size of the element. Values: {1, 2, 4, 8}. + * + * All entities are represented in native-endian byte-order in memory. + * For example, 'T2F4' format would represent the (float, float) tuple + * where elements are stored in little-endian byte-order on x86. + * + * @{ + */ + +/** Type of a tuple element */ +enum { + DRM_FORMAT_TUPLE_TYPE_UNORM = '_', /**< Unsigned integer value normalized to [0..1] range */ + DRM_FORMAT_TUPLE_TYPE_SINT = 'I', /**< Signed integer value */ + DRM_FORMAT_TUPLE_TYPE_UINT = 'U', /**< Unsigned integer value */ + DRM_FORMAT_TUPLE_TYPE_FLOAT = 'F', /**< Floating-point value */ +}; + +/** Generates a FOURCC value for a tuple */ +#define DRM_FORMAT_TUPLE(num_elements, type, size) \ + fourcc_code('T', '0'+(num_elements), DRM_FORMAT_TUPLE_TYPE_##type, '0'+(size)) + +/** @name Unsigned integers normalized to [0..1] range */ +/**@{*/ +#define DRM_FORMAT_T1_1 DRM_FORMAT_TUPLE(1, UNORM, 1) /** (X), 8-bit integers normalized to [0..1] range */ +#define DRM_FORMAT_T2_1 DRM_FORMAT_TUPLE(2, UNORM, 1) /** (X, Y), 8-bit integers normalized to [0..1] range */ +#define DRM_FORMAT_T4_1 DRM_FORMAT_TUPLE(4, UNORM, 1) /** (X, Y, Z, W), 8-bit integers normalized to [0..1] range */ +#define DRM_FORMAT_T1_2 DRM_FORMAT_TUPLE(1, UNORM, 2) /** (X), 16-bit integers normalized to [0..1] range */ +#define DRM_FORMAT_T2_2 DRM_FORMAT_TUPLE(2, UNORM, 2) /** (X, Y), 16-bit integers normalized to [0..1] range */ +#define DRM_FORMAT_T4_2 DRM_FORMAT_TUPLE(4, UNORM, 2) /** (X, Y, Z, W), 16-bit integers normalized to [0..1] range */ +/**@}*/ + +/** @name Signed integer values */ +/**@{*/ +#define DRM_FORMAT_T1I1 DRM_FORMAT_TUPLE(1, SINT, 1) /** (X), 8-bit signed integer */ +#define DRM_FORMAT_T2I1 DRM_FORMAT_TUPLE(2, SINT, 1) /** (X, Y), 8-bit signed integer */ +#define DRM_FORMAT_T4I1 DRM_FORMAT_TUPLE(4, SINT, 1) /** (X, Y, Z, W), 8-bit signed integer */ +#define DRM_FORMAT_T1I2 DRM_FORMAT_TUPLE(1, SINT, 2) /** (X), 16-bit signed integer */ +#define DRM_FORMAT_T2I2 DRM_FORMAT_TUPLE(2, SINT, 2) /** (X, Y), 16-bit signed integer */ +#define DRM_FORMAT_T4I2 DRM_FORMAT_TUPLE(4, SINT, 2) /** (X, Y, Z, W), 16-bit signed integer */ +#define DRM_FORMAT_T1I4 DRM_FORMAT_TUPLE(1, SINT, 4) /** (X), 32-bit signed integer */ +#define DRM_FORMAT_T2I4 DRM_FORMAT_TUPLE(2, SINT, 4) /** (X, Y), 32-bit signed integer */ +#define DRM_FORMAT_T4I4 DRM_FORMAT_TUPLE(4, SINT, 4) /** (X, Y, Z, W), 32-bit signed integer */ +/**@}*/ + +/** @name Unsigned integer values */ +/**@{*/ +#define DRM_FORMAT_T1U1 DRM_FORMAT_TUPLE(1, UINT, 1) /** (X), 8-bit unsigned integer */ +#define DRM_FORMAT_T2U1 DRM_FORMAT_TUPLE(2, UINT, 1) /** (X, Y), 8-bit unsigned integer */ +#define DRM_FORMAT_T4U1 DRM_FORMAT_TUPLE(4, UINT, 1) /** (X, Y, Z, W), 8-bit unsigned integer */ +#define DRM_FORMAT_T1U2 DRM_FORMAT_TUPLE(1, UINT, 2) /** (X), 16-bit unsigned integer */ +#define DRM_FORMAT_T2U2 DRM_FORMAT_TUPLE(2, UINT, 2) /** (X, Y), 16-bit unsigned integer */ +#define DRM_FORMAT_T4U2 DRM_FORMAT_TUPLE(4, UINT, 2) /** (X, Y, Z, W), 16-bit unsigned integer */ +#define DRM_FORMAT_T1U4 DRM_FORMAT_TUPLE(1, UINT, 4) /** (X), 32-bit unsigned integer */ +#define DRM_FORMAT_T2U4 DRM_FORMAT_TUPLE(2, UINT, 4) /** (X, Y), 32-bit unsigned integer */ +#define DRM_FORMAT_T4U4 DRM_FORMAT_TUPLE(4, UINT, 4) /** (X, Y, Z, W), 32-bit unsigned integer */ +/**@}*/ + +/** @name Floating-point values */ +/**@{*/ +#define DRM_FORMAT_T1F4 DRM_FORMAT_TUPLE(1, FLOAT, 4) /** (X), 32-bit floating-point */ +#define DRM_FORMAT_T2F4 DRM_FORMAT_TUPLE(2, FLOAT, 4) /** (X, Y), 32-bit floating-point */ +#define DRM_FORMAT_T4F4 DRM_FORMAT_TUPLE(4, FLOAT, 4) /** (X, Y, Z, W), 32-bit floating-point */ +/**@}*/ + +/**@}*/ + #endif /* DRM_FOURCC_H */ -- 1.7.9.5 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
