1282 lines
25 KiB
ReStructuredText
1282 lines
25 KiB
ReStructuredText
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
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.. _pixfmt-rgb:
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***********
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RGB Formats
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***********
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These formats encode each pixel as a triplet of RGB values. They are packed
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formats, meaning that the RGB values for one pixel are stored consecutively in
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memory and each pixel consumes an integer number of bytes. When the number of
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bits required to store a pixel is not aligned to a byte boundary, the data is
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padded with additional bits to fill the remaining byte.
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The formats differ by the number of bits per RGB component (typically but not
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always the same for all components), the order of components in memory, and the
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presence of an alpha component or additional padding bits.
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The usage and value of the alpha bits in formats that support them (named ARGB
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or a permutation thereof, collectively referred to as alpha formats) depend on
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the device type and hardware operation. :ref:`Capture <capture>` devices
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(including capture queues of mem-to-mem devices) fill the alpha component in
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memory. When the device captures an alpha channel the alpha component will have
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a meaningful value. Otherwise, when the device doesn't capture an alpha channel
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but can set the alpha bit to a user-configurable value, the
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:ref:`V4L2_CID_ALPHA_COMPONENT <v4l2-alpha-component>` control is used to
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specify that alpha value, and the alpha component of all pixels will be set to
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the value specified by that control. Otherwise a corresponding format without
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an alpha component (XRGB or XBGR) must be used instead of an alpha format.
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:ref:`Output <output>` devices (including output queues of mem-to-mem devices
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and :ref:`video output overlay <osd>` devices) read the alpha component from
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memory. When the device processes the alpha channel the alpha component must be
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filled with meaningful values by applications. Otherwise a corresponding format
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without an alpha component (XRGB or XBGR) must be used instead of an alpha
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format.
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Formats that contain padding bits are named XRGB (or a permutation thereof).
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The padding bits contain undefined values and must be ignored by applications,
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devices and drivers, for both :ref:`capture` and :ref:`output` devices.
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.. note::
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- In all the tables that follow, bit 7 is the most significant bit in a byte.
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- 'r', 'g' and 'b' denote bits of the red, green and blue components
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respectively. 'a' denotes bits of the alpha component (if supported by the
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format), and 'x' denotes padding bits.
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Less Than 8 Bits Per Component
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==============================
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These formats store an RGB triplet in one, two or four bytes. They are named
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based on the order of the RGB components as seen in a 8-, 16- or 32-bit word,
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which is then stored in memory in little endian byte order (unless otherwise
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noted by the presence of bit 31 in the 4CC value), and on the number of bits
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for each component. For instance, the RGB565 format stores a pixel in a 16-bit
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word [15:0] laid out at as [R\ :sub:`4` R\ :sub:`3` R\ :sub:`2` R\ :sub:`1`
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R\ :sub:`0` G\ :sub:`5` G\ :sub:`4` G\ :sub:`3` G\ :sub:`2` G\ :sub:`1`
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G\ :sub:`0` B\ :sub:`4` B\ :sub:`3` B\ :sub:`2` B\ :sub:`1` B\ :sub:`0`], and
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stored in memory in two bytes, [R\ :sub:`4` R\ :sub:`3` R\ :sub:`2` R\ :sub:`1`
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R\ :sub:`0` G\ :sub:`5` G\ :sub:`4` G\ :sub:`3`] followed by [G\ :sub:`2`
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G\ :sub:`1` G\ :sub:`0` B\ :sub:`4` B\ :sub:`3` B\ :sub:`2` B\ :sub:`1`
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B\ :sub:`0`].
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.. raw:: latex
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\begingroup
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\tiny
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\setlength{\tabcolsep}{2pt}
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.. tabularcolumns:: |p{2.8cm}|p{2.0cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
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.. flat-table:: RGB Formats With Less Than 8 Bits Per Component
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:header-rows: 2
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:stub-columns: 0
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* - Identifier
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- Code
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- :cspan:`7` Byte 0 in memory
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- :cspan:`7` Byte 1
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- :cspan:`7` Byte 2
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- :cspan:`7` Byte 3
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* -
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-
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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* .. _V4L2-PIX-FMT-RGB332:
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- ``V4L2_PIX_FMT_RGB332``
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- 'RGB1'
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`1`
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- b\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-ARGB444:
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- ``V4L2_PIX_FMT_ARGB444``
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- 'AR12'
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- a\ :sub:`3`
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- a\ :sub:`2`
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- a\ :sub:`1`
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- a\ :sub:`0`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-XRGB444:
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- ``V4L2_PIX_FMT_XRGB444``
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- 'XR12'
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- x
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- x
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- x
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- x
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-RGBA444:
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- ``V4L2_PIX_FMT_RGBA444``
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- 'RA12'
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- a\ :sub:`3`
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- a\ :sub:`2`
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- a\ :sub:`1`
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- a\ :sub:`0`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-RGBX444:
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- ``V4L2_PIX_FMT_RGBX444``
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- 'RX12'
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- x
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- x
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- x
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- x
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-ABGR444:
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- ``V4L2_PIX_FMT_ABGR444``
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- 'AB12'
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- a\ :sub:`3`
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- a\ :sub:`2`
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- a\ :sub:`1`
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- a\ :sub:`0`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-XBGR444:
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- ``V4L2_PIX_FMT_XBGR444``
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- 'XB12'
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- x
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- x
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- x
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- x
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-BGRA444:
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- ``V4L2_PIX_FMT_BGRA444``
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- 'BA12'
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- a\ :sub:`3`
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- a\ :sub:`2`
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- a\ :sub:`1`
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- a\ :sub:`0`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-BGRX444:
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- ``V4L2_PIX_FMT_BGRX444``
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- 'BX12'
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- x
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- x
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- x
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- x
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-ARGB555:
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- ``V4L2_PIX_FMT_ARGB555``
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- 'AR15'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- a
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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-
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* .. _V4L2-PIX-FMT-XRGB555:
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- ``V4L2_PIX_FMT_XRGB555``
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- 'XR15'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- x
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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-
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* .. _V4L2-PIX-FMT-RGBA555:
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- ``V4L2_PIX_FMT_RGBA555``
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- 'RA15'
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- a
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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- g\ :sub:`2`
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-
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* .. _V4L2-PIX-FMT-RGBX555:
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- ``V4L2_PIX_FMT_RGBX555``
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- 'RX15'
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- x
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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- g\ :sub:`2`
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-
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* .. _V4L2-PIX-FMT-ABGR555:
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- ``V4L2_PIX_FMT_ABGR555``
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- 'AB15'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- a
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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-
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* .. _V4L2-PIX-FMT-XBGR555:
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- ``V4L2_PIX_FMT_XBGR555``
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- 'XB15'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- x
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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-
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* .. _V4L2-PIX-FMT-BGRA555:
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- ``V4L2_PIX_FMT_BGRA555``
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- 'BA15'
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- a
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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- g\ :sub:`2`
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-
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* .. _V4L2-PIX-FMT-BGRX555:
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- ``V4L2_PIX_FMT_BGRX555``
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- 'BX15'
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- g\ :sub:`1`
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- g\ :sub:`0`
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- x
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- g\ :sub:`4`
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- g\ :sub:`3`
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- g\ :sub:`2`
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-
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* .. _V4L2-PIX-FMT-RGB565:
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- ``V4L2_PIX_FMT_RGB565``
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- 'RGBP'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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- g\ :sub:`5`
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|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
-
|
|
* .. _V4L2-PIX-FMT-ARGB555X:
|
|
|
|
- ``V4L2_PIX_FMT_ARGB555X``
|
|
- 'AR15' | (1 << 31)
|
|
|
|
- a
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
-
|
|
* .. _V4L2-PIX-FMT-XRGB555X:
|
|
|
|
- ``V4L2_PIX_FMT_XRGB555X``
|
|
- 'XR15' | (1 << 31)
|
|
|
|
- x
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
-
|
|
* .. _V4L2-PIX-FMT-RGB565X:
|
|
|
|
- ``V4L2_PIX_FMT_RGB565X``
|
|
- 'RGBR'
|
|
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
-
|
|
* .. _V4L2-PIX-FMT-BGR666:
|
|
|
|
- ``V4L2_PIX_FMT_BGR666``
|
|
- 'BGRH'
|
|
|
|
- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
- x
|
|
|
|
.. raw:: latex
|
|
|
|
\endgroup
|
|
|
|
|
|
8 Bits Per Component
|
|
====================
|
|
|
|
These formats store an RGB triplet in three or four bytes. They are named based
|
|
on the order of the RGB components as stored in memory, and on the total number
|
|
of bits per pixel. For instance, RGB24 format stores a pixel with [R\ :sub:`7`
|
|
R\ :sub:`6` R\ :sub:`5` R\ :sub:`4` R\ :sub:`3` R\ :sub:`2` R\ :sub:`1`
|
|
R\ :sub:`0`] in the first byte, [G\ :sub:`7` G\ :sub:`6` G\ :sub:`5` G\ :sub:`4`
|
|
G\ :sub:`3` G\ :sub:`2` G\ :sub:`1` G\ :sub:`0`] in the second byte and
|
|
[B\ :sub:`7` B\ :sub:`6` B\ :sub:`5` B\ :sub:`4` B\ :sub:`3` B\ :sub:`2`
|
|
B\ :sub:`1` B\ :sub:`0`] in the third byte. This differs from the DRM format
|
|
nomenclature that instead use the order of components as seen in a 24- or
|
|
32-bit little endian word.
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table:: RGB Formats With 8 Bits Per Component
|
|
:header-rows: 1
|
|
:stub-columns: 0
|
|
|
|
* - Identifier
|
|
- Code
|
|
- Byte 0 in memory
|
|
- Byte 1
|
|
- Byte 2
|
|
- Byte 3
|
|
* .. _V4L2-PIX-FMT-BGR24:
|
|
|
|
- ``V4L2_PIX_FMT_BGR24``
|
|
- 'BGR3'
|
|
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
-
|
|
* .. _V4L2-PIX-FMT-RGB24:
|
|
|
|
- ``V4L2_PIX_FMT_RGB24``
|
|
- 'RGB3'
|
|
|
|
- R\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
-
|
|
* .. _V4L2-PIX-FMT-ABGR32:
|
|
|
|
- ``V4L2_PIX_FMT_ABGR32``
|
|
- 'AR24'
|
|
|
|
- B\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
- A\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-XBGR32:
|
|
|
|
- ``V4L2_PIX_FMT_XBGR32``
|
|
- 'XR24'
|
|
|
|
- B\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
- X\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-BGRA32:
|
|
|
|
- ``V4L2_PIX_FMT_BGRA32``
|
|
- 'RA24'
|
|
|
|
- A\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-BGRX32:
|
|
|
|
- ``V4L2_PIX_FMT_BGRX32``
|
|
- 'RX24'
|
|
|
|
- X\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-RGBA32:
|
|
|
|
- ``V4L2_PIX_FMT_RGBA32``
|
|
- 'AB24'
|
|
|
|
- R\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
- A\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-RGBX32:
|
|
|
|
- ``V4L2_PIX_FMT_RGBX32``
|
|
- 'XB24'
|
|
|
|
- R\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
- X\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-ARGB32:
|
|
|
|
- ``V4L2_PIX_FMT_ARGB32``
|
|
- 'BA24'
|
|
|
|
- A\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
* .. _V4L2-PIX-FMT-XRGB32:
|
|
|
|
- ``V4L2_PIX_FMT_XRGB32``
|
|
- 'BX24'
|
|
|
|
- X\ :sub:`7-0`
|
|
- R\ :sub:`7-0`
|
|
- G\ :sub:`7-0`
|
|
- B\ :sub:`7-0`
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
10 Bits Per Component
|
|
=====================
|
|
|
|
These formats store a 30-bit RGB triplet with an optional 2 bit alpha in four
|
|
bytes. They are named based on the order of the RGB components as seen in a
|
|
32-bit word, which is then stored in memory in little endian byte order
|
|
(unless otherwise noted by the presence of bit 31 in the 4CC value), and on the
|
|
number of bits for each component.
|
|
|
|
.. raw:: latex
|
|
|
|
\begingroup
|
|
\tiny
|
|
\setlength{\tabcolsep}{2pt}
|
|
|
|
.. tabularcolumns:: |p{3.2cm}|p{0.8cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
|
|
|
|
|
|
.. flat-table:: RGB Formats 10 Bits Per Color Component
|
|
:header-rows: 2
|
|
:stub-columns: 0
|
|
|
|
* - Identifier
|
|
- Code
|
|
- :cspan:`7` Byte 0 in memory
|
|
- :cspan:`7` Byte 1
|
|
- :cspan:`7` Byte 2
|
|
- :cspan:`7` Byte 3
|
|
* -
|
|
-
|
|
- 7
|
|
- 6
|
|
- 5
|
|
- 4
|
|
- 3
|
|
- 2
|
|
- 1
|
|
- 0
|
|
|
|
- 7
|
|
- 6
|
|
- 5
|
|
- 4
|
|
- 3
|
|
- 2
|
|
- 1
|
|
- 0
|
|
|
|
- 7
|
|
- 6
|
|
- 5
|
|
- 4
|
|
- 3
|
|
- 2
|
|
- 1
|
|
- 0
|
|
|
|
- 7
|
|
- 6
|
|
- 5
|
|
- 4
|
|
- 3
|
|
- 2
|
|
- 1
|
|
- 0
|
|
* .. _V4L2-PIX-FMT-RGBX1010102:
|
|
|
|
- ``V4L2_PIX_FMT_RGBX1010102``
|
|
- 'RX30'
|
|
|
|
- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
- x
|
|
- x
|
|
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`9`
|
|
- b\ :sub:`8`
|
|
- b\ :sub:`7`
|
|
- b\ :sub:`6`
|
|
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`9`
|
|
- g\ :sub:`8`
|
|
- g\ :sub:`7`
|
|
- g\ :sub:`6`
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
|
|
- r\ :sub:`9`
|
|
- r\ :sub:`8`
|
|
- r\ :sub:`7`
|
|
- r\ :sub:`6`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
-
|
|
* .. _V4L2-PIX-FMT-RGBA1010102:
|
|
|
|
- ``V4L2_PIX_FMT_RGBA1010102``
|
|
- 'RA30'
|
|
|
|
- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
- a\ :sub:`1`
|
|
- a\ :sub:`0`
|
|
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`9`
|
|
- b\ :sub:`8`
|
|
- b\ :sub:`7`
|
|
- b\ :sub:`6`
|
|
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`9`
|
|
- g\ :sub:`8`
|
|
- g\ :sub:`7`
|
|
- g\ :sub:`6`
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
|
|
- r\ :sub:`9`
|
|
- r\ :sub:`8`
|
|
- r\ :sub:`7`
|
|
- r\ :sub:`6`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
-
|
|
* .. _V4L2-PIX-FMT-ARGB2101010:
|
|
|
|
- ``V4L2_PIX_FMT_ARGB2101010``
|
|
- 'AR30'
|
|
|
|
- b\ :sub:`7`
|
|
- b\ :sub:`6`
|
|
- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
|
|
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
- b\ :sub:`9`
|
|
- b\ :sub:`8`
|
|
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
- g\ :sub:`9`
|
|
- g\ :sub:`8`
|
|
- g\ :sub:`7`
|
|
- g\ :sub:`6`
|
|
|
|
- a\ :sub:`1`
|
|
- a\ :sub:`0`
|
|
- r\ :sub:`9`
|
|
- r\ :sub:`8`
|
|
- r\ :sub:`7`
|
|
- r\ :sub:`6`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
-
|
|
|
|
.. raw:: latex
|
|
|
|
\endgroup
|
|
|
|
12 Bits Per Component
|
|
==============================
|
|
|
|
These formats store an RGB triplet in six or eight bytes, with 12 bits per component.
|
|
Expand the bits per component to 16 bits, data in the high bits, zeros in the low bits,
|
|
arranged in little endian order.
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table:: RGB Formats With 12 Bits Per Component
|
|
:header-rows: 1
|
|
|
|
* - Identifier
|
|
- Code
|
|
- Byte 1-0
|
|
- Byte 3-2
|
|
- Byte 5-4
|
|
- Byte 7-6
|
|
* .. _V4L2-PIX-FMT-BGR48-12:
|
|
|
|
- ``V4L2_PIX_FMT_BGR48_12``
|
|
- 'B312'
|
|
|
|
- B\ :sub:`15-4`
|
|
- G\ :sub:`15-4`
|
|
- R\ :sub:`15-4`
|
|
-
|
|
* .. _V4L2-PIX-FMT-ABGR64-12:
|
|
|
|
- ``V4L2_PIX_FMT_ABGR64_12``
|
|
- 'B412'
|
|
|
|
- B\ :sub:`15-4`
|
|
- G\ :sub:`15-4`
|
|
- R\ :sub:`15-4`
|
|
- A\ :sub:`15-4`
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
16 Bits Per Component
|
|
=====================
|
|
|
|
These formats store an RGB triplet in six bytes, with 16 bits per component
|
|
stored in memory in little endian byte order. They are named based on the order
|
|
of the RGB components as stored in memory. For instance, RGB48 stores R\
|
|
:sub:`7:0` and R\ :sub:`15:8` in bytes 0 and 1 respectively. This differs from
|
|
the DRM format nomenclature that instead uses the order of components as seen in
|
|
the 48-bits little endian word.
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table:: RGB Formats With 16 Bits Per Component
|
|
:header-rows: 1
|
|
|
|
* - Identifier
|
|
- Code
|
|
- Byte 0
|
|
- Byte 1
|
|
- Byte 2
|
|
- Byte 3
|
|
- Byte 4
|
|
- Byte 5
|
|
|
|
* .. _V4L2-PIX-FMT-BGR48:
|
|
|
|
- ``V4L2_PIX_FMT_BGR48``
|
|
- 'BGR6'
|
|
|
|
- B\ :sub:`7-0`
|
|
- B\ :sub:`15-8`
|
|
- G\ :sub:`7-0`
|
|
- G\ :sub:`15-8`
|
|
- R\ :sub:`7-0`
|
|
- R\ :sub:`15-8`
|
|
|
|
* .. _V4L2-PIX-FMT-RGB48:
|
|
|
|
- ``V4L2_PIX_FMT_RGB48``
|
|
- 'RGB6'
|
|
|
|
- R\ :sub:`7-0`
|
|
- R\ :sub:`15-8`
|
|
- G\ :sub:`7-0`
|
|
- G\ :sub:`15-8`
|
|
- B\ :sub:`7-0`
|
|
- B\ :sub:`15-8`
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
Deprecated RGB Formats
|
|
======================
|
|
|
|
Formats defined in :ref:`pixfmt-rgb-deprecated` are deprecated and must not be
|
|
used by new drivers. They are documented here for reference. The meaning of
|
|
their alpha bits ``(a)`` is ill-defined and they are interpreted as in either
|
|
the corresponding ARGB or XRGB format, depending on the driver.
|
|
|
|
.. raw:: latex
|
|
|
|
\begingroup
|
|
\tiny
|
|
\setlength{\tabcolsep}{2pt}
|
|
|
|
.. tabularcolumns:: |p{2.6cm}|p{0.70cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
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.. _pixfmt-rgb-deprecated:
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.. flat-table:: Deprecated Packed RGB Image Formats
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:header-rows: 2
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:stub-columns: 0
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* - Identifier
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- Code
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- :cspan:`7` Byte 0 in memory
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- :cspan:`7` Byte 1
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- :cspan:`7` Byte 2
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- :cspan:`7` Byte 3
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* -
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-
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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|
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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* .. _V4L2-PIX-FMT-RGB444:
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- ``V4L2_PIX_FMT_RGB444``
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- 'R444'
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- g\ :sub:`3`
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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- a\ :sub:`3`
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- a\ :sub:`2`
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- a\ :sub:`1`
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- a\ :sub:`0`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-RGB555:
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- ``V4L2_PIX_FMT_RGB555``
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- 'RGBO'
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
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- b\ :sub:`4`
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- b\ :sub:`3`
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- b\ :sub:`2`
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- b\ :sub:`1`
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- b\ :sub:`0`
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|
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- a
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
|
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- g\ :sub:`4`
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- g\ :sub:`3`
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-
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* .. _V4L2-PIX-FMT-RGB555X:
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- ``V4L2_PIX_FMT_RGB555X``
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- 'RGBQ'
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|
|
- a
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- r\ :sub:`4`
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- r\ :sub:`3`
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- r\ :sub:`2`
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- r\ :sub:`1`
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- r\ :sub:`0`
|
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- g\ :sub:`4`
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- g\ :sub:`3`
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|
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- g\ :sub:`2`
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- g\ :sub:`1`
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- g\ :sub:`0`
|
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- b\ :sub:`4`
|
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- b\ :sub:`3`
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- b\ :sub:`2`
|
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- b\ :sub:`1`
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- b\ :sub:`0`
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-
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* .. _V4L2-PIX-FMT-BGR32:
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|
|
- ``V4L2_PIX_FMT_BGR32``
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- 'BGR4'
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|
|
- b\ :sub:`7`
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- b\ :sub:`6`
|
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- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
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- b\ :sub:`1`
|
|
- b\ :sub:`0`
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|
|
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- g\ :sub:`7`
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- g\ :sub:`6`
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|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
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|
|
|
- r\ :sub:`7`
|
|
- r\ :sub:`6`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
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|
|
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- a\ :sub:`7`
|
|
- a\ :sub:`6`
|
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- a\ :sub:`5`
|
|
- a\ :sub:`4`
|
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- a\ :sub:`3`
|
|
- a\ :sub:`2`
|
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- a\ :sub:`1`
|
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- a\ :sub:`0`
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|
* .. _V4L2-PIX-FMT-RGB32:
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|
|
|
- ``V4L2_PIX_FMT_RGB32``
|
|
- 'RGB4'
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|
|
|
- a\ :sub:`7`
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|
- a\ :sub:`6`
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|
- a\ :sub:`5`
|
|
- a\ :sub:`4`
|
|
- a\ :sub:`3`
|
|
- a\ :sub:`2`
|
|
- a\ :sub:`1`
|
|
- a\ :sub:`0`
|
|
|
|
- r\ :sub:`7`
|
|
- r\ :sub:`6`
|
|
- r\ :sub:`5`
|
|
- r\ :sub:`4`
|
|
- r\ :sub:`3`
|
|
- r\ :sub:`2`
|
|
- r\ :sub:`1`
|
|
- r\ :sub:`0`
|
|
|
|
- g\ :sub:`7`
|
|
- g\ :sub:`6`
|
|
- g\ :sub:`5`
|
|
- g\ :sub:`4`
|
|
- g\ :sub:`3`
|
|
- g\ :sub:`2`
|
|
- g\ :sub:`1`
|
|
- g\ :sub:`0`
|
|
|
|
- b\ :sub:`7`
|
|
- b\ :sub:`6`
|
|
- b\ :sub:`5`
|
|
- b\ :sub:`4`
|
|
- b\ :sub:`3`
|
|
- b\ :sub:`2`
|
|
- b\ :sub:`1`
|
|
- b\ :sub:`0`
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.. raw:: latex
|
|
|
|
\endgroup
|
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|
|
A test utility to determine which RGB formats a driver actually supports
|
|
is available from the LinuxTV v4l-dvb repository. See
|
|
`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access
|
|
instructions.
|