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Code Issues Releases Wiki Activity

better? RGB/BGR spec

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12998 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2004-08-11 01:52:17 +00:00
parent 0420248c08
commit 80cd6a1b3b
1 changed files with 25 additions and 3 deletions
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28
DOCS/tech/colorspaces.txt
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@ -103,6 +103,28 @@ OpenGL's GL_RGB on all platforms, and the same goes for BGR - GL_BGR.
Unfortunately, most of the x86 codecs call our BGR to RGB, so it sometimes Unfortunately, most of the x86 codecs call our BGR to RGB, so it sometimes
confuse developers. confuse developers.
If you are unsure, try the OpenGL driver (-vo gl:manyfmts). There is at least memory order: name
software OpenGL implementation for all major platforms and OS's, but you will RGBA IMGFMT_RGBA
need OpenGL version >= 1.2 for most formats. ARGB IMGFMT_ARGB
BGRA IMGFMT_BGRA
ABGR IMGFMT_ABGR
RGB IMGFMT_RGB24
BGR IMGFMT_BGR24
order in an int name
mostsignifant .. least significant bit
8A8R8G8B IMGFMT_BGR32
8A8B8G8R IMGFMT_RGB32
5R6G5B IMGFMT_BGR16
5B6G5R IMGFMT_RGB16
1A5R5G5B IMGFMT_BGR15
1A5B5G5R IMGFMT_RGB15
3R3G2B IMGFMT_BGR8
2B3G3R IMGFMT_RGB8
1R2G1B IMGFMT_BGR4_CHAR
1B2G1R IMGFMT_RGB4_CHAR
1R2G1B1R2G1B IMGFMT_BGR4
1B2G1R1B2G1R IMGFMT_RGB4
depending upon little vs big endian different in memory & in register formats
will be equal (LE -> BGRA == BGR32 / BE -> ARGB == BGR32)