Il giorno gio, 27/03/2008 alle 17.01 +0100, Denis Oliver Kropp ha scritto: > 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?
As far as I known, the Radeon has only one stream processor... or probably I'm misunderstanding what you mean for "stream processor"... are you talking about the vertex pipeline? > > > method to specify a scaling factor for each coordinate, something like > > SetPixelZoom(16.16)). > > Or SetViewport( src_rect, dst_rect ) ? But a SetPixelZoom() like function (with a single scale factor) requires less computations if the viewport is not directly supported by the hardware. > > 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! If you mean FillTriangles(DFBTriangle *tris, int num), I already have it in my local repo of DirectFB, but the performance improvement is not significative. I will test with FillTriangles(DFBPoint *vertices, int num DFBTriangleFormation formation). > > 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 :) > This is the complete report: SetColor: 566 SetPorterDuff: 339 SetMatrix: 305 SetDrawingFlags: 566 SetBlittingFlags: 261 SetRenderOptions: 827 FillRectangle: 3654 FillTriangle: 6949 DrawLines: 78 Blit: 261 However the impact of SetColor and co. is minimal, at least for my CPU (which is an AMD64). -- Claudio Ciccani [EMAIL PROTECTED] [EMAIL PROTECTED] http://directfb.org _______________________________________________ directfb-dev mailing list directfb-dev@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
