Claudio Ciccani wrote: > Il giorno gio, 27/03/2008 alle 11.40 +0100, Denis Oliver Kropp ha > scritto: >> Guess it uses SetMatrix() and lots of SetSourceMask(). > > Actually I'm not using SetSourceMask(). > The API specification is incomplete. For example, how should it behave > when mask size differs from source size? In the Radeon driver the mask > gets scaled, but OpenVG requires not scaling.
In Water it can be chosen :) In IDirectFBSurface it's unscaled, I thought, unless you use StretchBlit(). So source and mask are always pixel aligned. > Regarding SetMatrix(), the API needs to be changed. OpenVG requires > projective transformations too (3x3 matrix) and we need a way to Good to know :) > separate matrix transformation form coordinates scaling (i.e. adding a Scaling might be good to have separately. So far, in Water (again:) only the offset into the destination surface is a separate attribute. BTW, can we use any of the stream processors (?) on the Radeon with DirectFB? > method to specify a scaling factor for each coordinate, something like > SetPixelZoom(16.16)). Or SetViewport( src_rect, dst_rect ) ? Translates and scales coordinates based on a rectangle in source and destination space. >> How many public API calls (roughly) are needed for this graphics? >> > > Below is the number of drawing calls required to render the tiger. > > FillRectangle: 261 > FillTriangle: 6949 Wow, I thought about turning dfb_gfxcard_fill_triangle() into dfb_gfxcard_fill_triangles() a few days ago! How many color or other changes do you have within these 6949 calls? > DrawLines: 78 > Blit: 261 Nothing else? And no Matrix or Mask? This could run well even on basic 2D chips :) -- Best regards, Denis Oliver Kropp .------------------------------------------. | DirectFB - Hardware accelerated graphics | | http://www.directfb.org/ | "------------------------------------------" _______________________________________________ directfb-dev mailing list directfb-dev@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
