From 92968aae5d263a87ce59a987ae962df9e2f12a03 Mon Sep 17 00:00:00 2001 From: Jamie Tittle Date: Tue, 12 Apr 2005 03:34:40 +0000 Subject: added colorspace message which allows us to select the destination colorspace (YUV, RGB/BGR, RGBA/BGRA); now uses GemPixUtils color conversions to centralize the code svn path=/trunk/externals/gem2pdp/; revision=2714 --- README | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'README') diff --git a/README b/README index f632113..dacd778 100644 --- a/README +++ b/README @@ -1,7 +1,8 @@ ***************************************************************************** -copyleft 2003 by Yves Degoyon ( ydegoyon@free.fr ) +copyleft 2003-2005 by Yves Degoyon ( ydegoyon@free.fr ) -tarballs and updates available @ http://ydegoyon.free.fr +tarballs and updates available @ http://ydegoyon.free.fr +osx versions available @ http://homepage.mac.com/tigital gemp2pdp : GEM to PDP bridge @@ -18,3 +19,10 @@ patents. ***************************************************************************** +notes: + +- now allows you to select the colorspace that pdp's yv12 image format is converted to. This means we can now request a YUV colorspace, which is computationally much faster than yv12 to RGB or RGBA (so much so that it is the default). Colorspace can be indicated on object creation (ie. [pdp2gem RGB]) or by message (ie. [colorspace YUV<) + +- now uses standardized color conversions found in GemPixUtil.cpp, which includes altivec speedups! These use formulae from http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC30 + +- please note that colorspace switching between objects is handled automatically by GEM unless specifically stated (ie. by [pix_yuv], [pix_rgba], [pix_grey]) \ No newline at end of file -- cgit v1.2.1