http://blog.gmane.org/gmane.comp.graphics.opengraphics hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.comp.graphics.opengraphics/9523 <pre>I know graphics architecture, and I know how to do all the math. But, oddly, I've never actually used a 3D API like OpenGL, Direct3D or Java3D. Well, I'm trying to write a demo for a paper I'm presenting at HPCA, and I've run into something odd. I was hoping some with actual front-end experience might be able to help me. I figured since this is a graphics mailing list, this wouldn't be horribly off topic. I'm using Java3D to render a scene with lots of translucent planes. If I make everything opaque, it's fine, because it's doing Z culling. But I'm finding that the rendering order isn't near-to-far, as I expected, but something perhaps related to the order in which I created the scene elements. As a result, when I turn on alpha blending, it looks horrible. I'm starting to worry that what I'm going to have to do is do all my coordinate transforms up-front (rather than create a transform group and transform the group), then sort by Z order, then add them to the scene (and by trial and error determine wh</pre> Timothy Normand Miller 2012-01-18T02:31:29 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9520 <pre>Now that opengraphics.org has been transferred to Yann, we'd like to offer "&lt; at &gt;opengraphics.org" email addresses. For now, just forwarding. Should we make this open to just anyone? Or should we take nominations for people who have been long-time contributors, so that there's some specialness or exclusivity to it? :) </pre> Timothy Normand Miller 2011-11-23T16:56:28 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9517 <pre>With my Ph.D. and family taking up most of my time right now, I haven't gotten to work on OGP much. But I haven't forgotten about it. For my consulting work, I had to learn Java to write a cross-platform app. Separately, just as a way to further develop my skill, I wrote this unrelated program: https://sourceforge.net/projects/minuteman/ That's gotten me set up to work on what I REALLY wanted to do, which is an IDE for chip design. I mentioned this a long time ago. One of the problems with coding HDLs is the massive amount of error-prone coding you have to do just to stitch modules together. Get one wire the wrong size, and you get misbehavior that causes to develop more gray hairs. If this could be done graphically, we could save a lot of time and pain. There are also lots of "standard" modules that can be just pasted in and hooked up (fifes and various types of pipeline stage templates come to mind). I don't get much time to work on it, so I haven't gotten very far. But here's a screenshot: http</pre> Timothy Normand Miller 2011-11-16T21:02:27 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9515 <pre>We're having some problem with our registrar, and the opengraphics.org domain is going to expire. Would anyone be willing to re-register the domain with another registrar after that? </pre> Timothy Normand Miller 2011-11-16T05:51:52 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9512 <pre>We need a new wiki maintainer/editor. Would someone be willing to do some minor edits and spam removal while we're in a holding pattern? I'll have my Ph.D. done early next year, and Andre should have his project going sooner or later. So it'll pick up again. I've also been doing some circuit design on the side here and there. So OGP isn't dead, but prominent members have been pulled in too many directions for the time being. Thanks. </pre> Timothy Normand Miller 2011-10-03T16:36:00 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9505 <pre>How important are denormalized floats in GPUs? For graphics, I would expect very little. For GPGPU, it might matter. The reason I ask pertains to floating point multiplies. If you want to multiply by denormalized numbers, then the number of bits you have to process may be more. Let's think about what kinds of results you can get from a multiply and how this applies to shifting. If you multiply any two denormalized numbers, you'll get an underflow simply because of the exponent. If you multiply any two normalized numbers, then the smallest result (ignoring the exponent) is 1.0, requiring no shift or adjustment to the exponent. The largest result you can get is 3.999..., which requires the exponent (the sum of the operand exponents) to be increased by 1 and the mantissa to be shifted right by 1. (But to be clear, since these are 24-bit numbers, their product is 47 bits, and you have to discard the lower 23 bits (with rounding) to get back to 24. Then you may shift some more.) If you multiply a n</pre> Timothy Normand Miller 2011-08-25T19:55:14 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9497 <pre>it looks like xilinx may have laid the golden goose - can i ask people here to help evaluate this: http://www.xilinx.com/products/silicon-devices/epp/zynq-7000/index.htm that's an incredible combination of a state-of-the-art FPGA, about the same capabilities of a Spartan 3 4000, with an on-board 800mhz Dual-Core Cortex A9. the existing interfaces include some quite basic ones that should be expected - USB2, I2C, CAN-bus, RS232 and so on, but then also include 2 Gigabit Ethernet and, in the case of the 7030 and 7040, multi-lanes of PCI-e (between 4 for the smaller versions at 468 pins, and 12 for the absolute largest 900-pin monster) now, the possibilities for this kind of combination are very, very exciting. 1) as there are no proprietary hard macro cells such as 3D Graphics or MPEG engines, the CPU will undoubtedly be FSF Hardware-Endorsement Compliant. 2) (someone please check!) i believe that the capabilities of the 7030 version should be sufficient to take over from the Spartan 3 4000, meaning that</pre> Luke Kenneth Casson Leighton 2011-08-20T17:32:23 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9482 <pre>For those who are not in open-hardware list.. I haven't received any response in three weeks :) Hi all, I would like to ask for suggestions about my idea for a modular (FPGA) development system. As I am designing new devices and the resources for the prototype are not always known, it is hard to decide how much is enough (of gates, ram, ram type, etc). I know that the design can be tested on development boards, but I am doing quite specific things and in a way that I try to get the shape of the thing first and code it later. And the limiting factor of a development kit is that it has usually only one slot for extension. As a result, I came to an idea of a very modular development system - where each building block can be replaced or multiplied for higher parallelism. Basically I take an FPGA, and put around it four plugs - which mate to little boards serving as interconnect. The device boards have just one plug (the same as an fpga). The plugs are board-to-board ones, with 80 ter</pre> Ing. Daniel Rozsnyó 2011-08-18T15:22:18 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9477 <pre>Hello everyone, I'd like to ask you how remote the possibility is of totally cost-free (free as in beer), open source hardware, just like in FOSS. Now, I know that there are communities focused on the business model aspects of OSH, but I'd also very much appreciate the opinions of engineers, manufacturers and developers from various projects. Thanks in advance, Ilias K. Yet another CS graduate </pre> Ilias K. 2011-08-18T02:03:53 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9472 <pre>hey, all, does anyone know the SVN repository still works or not? suppose it should be this one: https://svn.suug.ch/repos/opengraphics/main thanks, /xiaohan </pre> Ma, Xiaohan 2011-08-15T05:32:07 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9464 <pre>Hi, is the rasterizer as described in open_graphics_outline.pdf implemented? I'm aware of ogp/trunk/rtl/ogengine/rasterizer but I can't see code that shows how to communicate with the device. I would like to draw some lines on the screen. Regards, Martin </pre> Martin Kielhorn 2011-06-28T17:06:49 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9454 <pre>Hi list, is it possible to synchronise the drawing process to the vsync cycle of the graphics card from user level? Or should I try to modify driver/linux/ogp_skel.c to my needs? I want to have a program that consecutive draws numbers on the framebuffer, so that every frame displays the following integer. Then I want to use a camera to capture these images. I had a really hard time when I tried to do this with Nvidia or ATI cards and I think I still haven't solved it. Regards, Martin </pre> Martin Kielhorn 2011-06-28T10:35:59 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9450 <pre>Hi, I have a problem in the sense that the 1280x1024-32&lt; at &gt;60Hz mode isn't really 60Hz. The screen says the VSYNC rate is 47Hz. The Samsung screen actually displays the test picture, but the ForthDD display that I need to get running, doesn't work. Hopefully someone on this list can shed some light on this. I uploaded two screenshots of a tool that came with the ForthDD display http://imgur.com/a/a4f6p The top one is with the Nvidia card and the bottom one with the open graphics hardware. The OGD1 tool prints this: Requested clock = 216180000 Actual clock = 214285680 (difference = 1894320) That means the actual clock is 0.8% off, that doesn't explain the 47Hz VSYNC rate that the screens report Appart from the frequencies I see differences in the IFM_PIX_SYS_RATIO and the tick at 'h+ sync'. This is the output of oga1-vide-test: cyberpower:/opt/ogp/bin# ./oga1-vid-test --busid 0b:1.0 oga1_i2c_get_edid: Reading EDID for top head. manufacturer ID = "FDD" product=4868 sn=16777216 (2002 week 16) EDI</pre> Martin Kielhorn 2011-06-27T10:10:30 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9447 <pre>Hi, here I document my first steps with the OGD1 board. My setup: I am interested in an application where every second frame of a graphics card is captured by a camera. The camera is triggered by the VSYNC signal of the graphics card and the exposure time is approximately 15ms. I use a cheap logic analyzer to verify that the trigger pulses are correct. The graphics card is connected to a ferro electric liquid crystal display (http://www.forthdd.com, ca. 3000 USD, WXGA R3, 1280x768, 60 Hz) which acts like a normal digital LCD screen with DVI but displays each frame as 24 black and white bit planes. My motivation: I tried to control the display with the proprietary Linux drivers of a Nvidia GeForce 9600 GT as well as an ATI Mobility Radeon HD 4200 and ran into problems with sync to vblank. I always observe image tearing, no matter what I try. My goal is to understand enough of the OGD1 to produce animations without image tearing. Installation: First I had to find an old graphics card and scavanged its pan</pre> Martin Kielhorn 2011-06-25T01:14:28 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9443 <pre>Hi, is it possible to use the OGD1 board in a system with PCI express? Can anyone recommend an adapter from PCI-e to PCI-x. </pre> Martin Kielhorn 2011-06-20T11:33:13 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9441 <pre>There are still 12 OGD1 boards that remain "in stock." Since some of the original production run have been sold, we need to hold onto a few for warranty purposes. But basically, we can lend and sell most of the rest. We made these cards so that people could use them, preferably for projects that help the cause of Open Graphics and Open Hardware in general. So let's see if we can avoid having them sit on the shelf. They're available for purchase for $750. And if you can make a case regarding past and/or future contributions to the community, then you can petition to have one "lent" to you. BTW, Michael Dexter will make the final decisions on who gets a card. If you want one, keep your application concise. I'd like suggestions on how we might reach the right people. Obviously, if you're on this mailing list, you have some advantages. </pre> Timothy Normand Miller 2011-06-17T17:23:53 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9433 <pre>Hi, I have a problem. If you can help that would be of great help. I'm an undergraduate student. I'm implementing pci protocol for my project in the uni. Aim: My pcb has to communicate with a pcb (contains Intel microcontroller + pci bridge) via pci protocol. In my pcb the microcontroller is Renesas (V850) and it doesn't have a pci controller. I did not use any standalone pci controllers in my pcb. I do not know if it's possible to implement the pci config space registers in my microcontroller. I do not have DeviceID and I suppose I can use any random number. Also, the Intel pcb is not reprogrammable. All I have to do now is to implement config space in my device and power on and check if the device is getting detected. For this the Master (Intel pcb) has to read the config space and send IDSEL signal. I'm going through the verilog code of the admin in this forum. The verilog code given in Opencores forum is very complicated and I'm not using wishbone. I want to map the device to memory space and did not u</pre> Sanjeev Jamadhagni 2011-05-29T18:29:52 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9432 <pre>Hello, I think you guys have done an amazing work but the opengraphics project is looking stagnant, maybe dead. I have experience making engineering products and sooner or later you always need the same thing: someone buying your products. It seems you have very good engineers working on a hard problem but you dismissed the "marketing" thing, so I'm going to put out here some ideas about what could make ogp to success. I know ogp is your baby but please don't feel bad about this email, but as the feedback it is. As much as people like me like the idea behind ogp nobody I know could justify spending money on it because it does better than anyone else ...err... nothing. I know what you are thinking: We are competing with Nvidia or AMD, we can't be better than them!! but yes you can be better the same way that Andruino is better than anybody else in what it does. Ogp had tried to compete doing fixed pipeline OpenGL, this is not even the present, it is past, every single GPU maker is making it more and more f</pre> Jose Hevia 2011-05-26T20:37:45 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9429 <pre>Dear OGP members, Andre Pouliot and I have been strugging with the problem of how to make the OGP productive again. The OGP has made a lot of accomplishments, but activity has been dead for quite a while now. We believe that part of the problem has been how we tried to go about funding development. It was all wrong, because we shot too high with OGD1, and we couldn't afford to go into production until after interest had waned considerably. Some serious restructuring is necessary, and we've been working on a plan for that. In short, we need a way to create cash flow to fund hardware production, and we believe we have come up with a solution that includes every contributor in both the design and economic aspects. We will spread out the cost burden, spread out the profit among contributors, and invest in less ambitious projects, with broader appeal. At the moment, the plan is about 75% baked, and we want to make sure it's very clear and logical before we publish it. For that, we'd like some feedback fr</pre> Timothy Normand Miller 2011-05-16T19:02:18 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9428 <pre>Due to the recent increase in spam, the wiki has had a tweak regarding passwords. Existing passwords will not be affected, though you may notice it when you update an expired password. We will keep an eye on things and adjust as we need to. thanks JHB ps Due to my time restrictions, we could do with a volunteer to assist the current wiki admin. </pre> Josephblack 2011-05-15T11:17:14 http://comments.gmane.org/gmane.comp.graphics.opengraphics/9425 <pre>Looks like some folks are trying to build an open source CPU. Is this just for the extremists, or are commercial CPUs insufficiently documented?  I haven't heard of any problems. http://hardware.slashdot.org/story/11/04/30/172214/Help-Build-the-Worlds-First-Community-Funded-CPU-ASIC The problem area is GPU video decoding.  AMD/ATI has yet to release any docs on UVD, and judging from Bridgman's postings I don't expect any anytime soon, if ever.  :-( So, what's going on regarding the OGC project? </pre> Dieter BSD 2011-04-30T20:01:21 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.comp.graphics.opengraphics