The attached patch adds alpha blending support to the video overlay on radeon hardware. It's been tested on my 9200. It adds three new Xv attributes: XV_ALPHA_MODE, XV_GR_ALPHA, and XV_OV_ALPHA.
XV_ALPHA_MODE - (0 or 1) selects the alpha blending mode. right now it only supports key and global modes, per-pixel can be added later. 0 is key mode, 1 is global mode. Key mode blends the overlay or graphics layer with the colorkey. Global mode blends the graphics layer and the overlay. XV_GR_ALPHA - (0-255) set the alpha level of the graphics layer (everything but the overlay) (applies to either mode) XV_OV_ALPHA - (0-255) set the alpha level of the overlay (applies to either mode) The patch is against DRI cvs, but should apply pretty easily to any tree. I'm not 100% clear on the function the first two fields of OV0_KEY_CNTL, perhaps someone out there could explain it to me. see my comments in the code. let me know if you have any comments or questions. Is it worth opening a bug in bugzilla for this? The patch and binaries also are available here: http://www.botchco.com/alex/radeon/xv_alpha/ Look out for an improved Xv gamma patch soon. Thanks, Alex __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree
radeon_xvalpha.diff
Description: radeon_xvalpha.diff
