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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-9F9CE6B6-1B3D-50A6-8A94-BD391732EF2D" xml:lang="en"><title>Luminosity

    13 Pixel Formats</title><shortdesc>This topic provides detailed information about the supported luminosity

    14 pixel formats. These formats are used to represent grayscale images.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    15 <section id="GUID-320B39DE-E3E7-4222-9CC9-5B4471F88710"><title>EUidPixelFormatL_1</title> <p>This format has

    16 1 bit per pixel. It is implicit in the code that pixel addresses within a

    17 byte increase from low bit to high bit. A little-endian architecture is also

    18 implicit, because conversions are made from pointers to byte and from pointers

    19 to (unsigned) int and there is an implication that pixel addresses within

    20 a 32-bit word also increase from low to high-order bit. </p> <fig id="GUID-7E3D8B96-2CC0-58C8-856D-21847782878E">

    21 <title>              Pixel address layout in memory for the EUidPixelFormatL_2

    22 format            </title>

    23 <image href="GUID-736BB5CF-0E2B-59FC-BC65-E52A7D12EC4A_d0e208297_href.png" placement="inline"/>

    24 </fig> <p>The equivalent UID value is {0x102858EF}. </p> </section>

    25 <section id="GUID-A8A6123A-5766-4993-AEDB-D069831D9064"><title>EUidPixelFormatL_2</title> <p>This format has 2 bits per pixel.

    26 It is implicit in the code that pixel addresses within a byte increase from

    27 low bit to high bit. A little-endian architecture is also implicit, because

    28 conversions are made from pointers to byte and from pointers to (unsigned)

    29 int and there is an implication that pixel addresses within a 32-bit word

    30 also increase from low to high-order bit. </p> <fig id="GUID-5D4C0942-42F8-5094-B376-DC4252816437">

    31 <title>              Pixel address layout in memory for the EUidPixelFormatL_2

    32 format            </title>

    33 <image href="GUID-CB7A54D9-C6C8-562A-8A52-4B17B37242AD_d0e208316_href.png" placement="inline"/>

    34 </fig> <p>The equivalent UID value is {0x102858EE}. </p> </section>

    35 <section id="GUID-71CFCD00-7223-40CA-8A26-205792E3E7C7"><title>EUidPixelFormatL_4</title> <p>This format has 4 bit per pixel.

    36 It is implicit in the code that pixel addresses within a byte increase from

    37 low bit to high bit. A little-endian architecture is also implicit, because

    38 conversions are made from pointers to byte and from pointers to (unsigned)

    39 int and there is an implication that pixel addresses within a 32-bit word

    40 also increase from low to high-order bit. </p> <fig id="GUID-6021C416-EAF0-5FAA-9181-13A0FB14D518">

    41 <title>              Pixel address layout in memory for the EUidPixelFormatL_4

    42 format            </title>

    43 <image href="GUID-65C997F4-3899-56B1-85DD-9425E06F128B_d0e208335_href.png" placement="inline"/>

    44 </fig> <p>The equivalent UID value is {0x102858ED}. </p> </section>

    45 <section id="GUID-719B6262-9AC5-4372-A082-36E559FE7922"><title> EUidPixelFormatL_8</title> <p>This format has 8 bit per pixel.

    46 A little-endian architecture is implicit in the code, because conversions

    47 are made from pointers to byte and pointers to (unsigned) integer and there

    48 is an implication that the lower-order byte of an unsigned integer has the

    49 physically lower address. </p> <p>8-bit per pixel color bitmaps use indexed

    50 look up tables and monochrome bitmaps represent the 256 levels of gray directly. </p> <fig id="GUID-7047A561-981B-56B9-BCFD-5F2E4C757B79">

    51 <title>              Pixel address layout in memory for the EUidPixelFormatL_8

    52 format            </title>

    53 <image href="GUID-49F16A96-083E-5928-B939-75F2D11E2BF8_d0e208357_href.png" placement="inline"/>

    54 </fig> <p>The equivalent UID value is {0x102858EC}. </p> </section>

    55 </conbody><related-links>

    56 <link href="GUID-7E6DDDBB-FDE2-59ED-A932-AFD4D0BAC3E3.dita"><linktext>RGB     

    57            Pixel Format</linktext></link>

    58 <link href="GUID-D429672C-448D-5E91-ABA0-81680869D69E.dita"><linktext>YUV Pixel

    59 Format</linktext></link>

    60 </related-links></concept>