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© Copyright 3Dlabs 2004 Page 1 Super Buffers Workgroup Status update, June 2004
© Copyright 3Dlabs 2004 Page 2 March 2004 – Workgroup reset Too large of a scope Render-to-texture, render-to-vertex-array, buffer swaps, memory objects, sub mems, validation Could not get agreement in workgroup Competing proposal by NVIDIA / APPLE / 3Dlabs submitted EXT_render_target with focus on render-to-texture functionality
© Copyright 3Dlabs 2004 Page 3 March Results Narrower focus for workgroup Render-to-texture first, render-to-vertex array second Uber Buffers Lite spec from ATI and Render Target new basis for WG Workgroup chair and spec editor not from the same company Jon Leech interim chair Should be policy for all workgroups
© Copyright 3Dlabs 2004 Page 4 April 2004 Both Uber Buffers Lite and Render Target specifications refined Vote called to pick one to move forward Vote resulted in a DRAW UBL: SGI, ATI, Intel RT: IBM, NVIDIA, APPLE Abstain: 3Dlabs Other (7)
© Copyright 3Dlabs 2004 Page 5 May 2004 Lots of discussion on how to move forward Third spec proposed: EXT_Compromise_Buffers Addressing key criticim against both UBL and RT One Contentious key issue identified that set RT and UBL / CB apart RT: indirect handles UBL and CB: Direct handles Vote called on direct vs indirect handles Vote resulted in favor of direct handles (5 against 2) Direct handles: 3Dlabs, ATI, IBM, Intel, SGI Indirect handles: NVIDIA, APPLE
© Copyright 3Dlabs 2004 Page 6 May / June 2004 Workgroup decided to use the EXT_Compromise_buffers spec In favor: SGI, 3Dlabs, ATI, Intel. Abstain: NVIDIA, IBM (5 / 2) Key decision! ATI spec editor 3Dlabs workgroup chair In process of identifying and closing CB spec issues Proposed timeline (open for discussion) Sept 2004 – Draft CB based spec with render-to-texture support Dec 2004 – Final render-to-texture spec. Promoted to ARB Dec 2004 – 1 st Draft render-to-vertex array spec March 2005 –2 nd Draft render-to-vertex array spec June 2005 – Final render-to-vertex array spec. Promoted to ARB status June 2005 – Render-to-texture support added to core No benefit Need 16-bit fp Need 32-bit fp Need 16-bit and/or 32-bit fp
© Copyright 3Dlabs 2004 Page 7 ConclusionConclusion It has been a rocky 3 months Progress is now being made! Thanks to all workgroup participants, especially NVIDIA and ATI for the compromises made and their efforts to keep the workgroup going! Questions ?
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