X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=inline;f=irc%2F%23ipdf.log;h=3470f59a3733e71dbf148c02c17405837d3888d4;hb=b17539df71843a2d782fd789407e52b8414bb09f;hp=258dd655eff685cb8b5a552c939f89028c2cc01b;hpb=30c5f83396f8a12e294771aacb3dd9d0c2b3fa43;p=ipdf%2Fdocuments.git diff --git a/irc/#ipdf.log b/irc/#ipdf.log index 258dd65..3470f59 100644 --- a/irc/#ipdf.log +++ b/irc/#ipdf.log @@ -190,3 +190,242 @@ 00:11 <@matches> This is why it isn't in the code repo 00:19 <@matches> Whoops, there are some blatantly wrong comments in vfpu.cpp 00:19 <@matches> Oh well +--- Day changed Fri Apr 11 2014 +13:38 <@matches> Warning! I am about to make a ipdf/vfpu repo +13:43 <@matches> You know what's really cool +13:43 <@matches> You can run it as `vfpu --vcd=output.vcd` +13:43 <@matches> And it will create a gtkwave file as it runs showing all the operations +13:44 <@matches> You only get the simulated time from the point of view of the device +13:44 <@matches> Which is probably useful +13:46 <@matches> Or it would be if I wanted to compare different devices +13:47 <@matches> To do that I need to actually make different devices... +17:12 <@matches> Would you prefer seperate repos for the individual reports or just sub directories in the documents repo? +17:12 <@matches> I can't decide +17:12 <@matches> On the one hand 5+ repos is getting a bit out of hand +17:12 <@matches> On the other hand they are individual work +17:24 <@matches> Individual seems best +20:31 <@matches> Hmm +20:31 <@matches> The sqrt op in the fpu appears to have been commented out +20:31 <@matches> Also despite having constants for the sizes of things they have just used magic numbers everywhere +20:34 <@matches> I need an IRC script to prevent myself from saying stuff unless someone else has said things, or this channel will just be me ranting +--- Day changed Mon Apr 14 2014 +13:42 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +13:43 -!- Netsplit over, joins: @sulix +14:42 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +14:43 -!- Netsplit over, joins: @sulix +18:32 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +18:32 -!- Netsplit over, joins: @sulix +18:34 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +18:35 -!- Netsplit over, joins: @sulix +18:36 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +18:38 -!- Netsplit over, joins: @sulix +18:40 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +18:41 -!- Netsplit over, joins: @sulix +18:41 -!- Netsplit 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+19:35 -!- sulix [sulix@motsugo.ucc.gu.uwa.edu.au] has joined #ipdf +19:35 -!- ServerMode/#ipdf [+o sulix] by mussel.ucc.au.uniirc.com +19:40 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:42 -!- Netsplit over, joins: @sulix +19:44 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:48 -!- sulix [sulix@motsugo.ucc.gu.uwa.edu.au] has joined #ipdf +19:48 -!- ServerMode/#ipdf [+o sulix] by mussel.ucc.au.uniirc.com +19:54 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:54 -!- Netsplit over, joins: @sulix +19:54 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:54 -!- Netsplit over, joins: @sulix +19:55 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:56 -!- You're now known as 13VAAAAGJ +19:56 -!- Netsplit over, joins: @sulix +19:57 <@13VAAAAGJ> Why am I now known as 13VAAAAGJ +19:57 <@13VAAAAGJ> WHAT THE FUCK IS GOING ON +19:57 <@13VAAAAGJ> ARE WE UNDER ATTACK +19:57 <@13VAAAAGJ> Oh crap this is #ipdf +19:57 <@13VAAAAGJ> Um, disregard this bit of the totally project related conversation +19:57 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +19:57 <@13VAAAAGJ> I'd edit the commit script to censor the swear words, but effort +19:57 <@13VAAAAGJ> Oh dear +19:57 -!- Netsplit over, joins: @sulix +19:57 <@13VAAAAGJ> Hello +19:58 <@13VAAAAGJ> I think mantis might be dying? +19:59 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +20:00 -!- Netsplit over, joins: @sulix +20:01 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +20:01 -!- Netsplit over, joins: @sulix +20:04 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +20:04 -!- Netsplit over, joins: @sulix +20:05 <@13VAAAAGJ> Sigh +20:07 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +20:07 -!- Netsplit over, joins: @sulix +20:08 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +20:08 -!- Netsplit over, joins: @sulix +20:08 -!- Netsplit mantis.ucc.au.uniirc.com <-> arctic.uniirc.com quits: @sulix +20:09 -!- Netsplit over, joins: @sulix +20:09 -!- Netsplit arctic.uniirc.com <-> mussel.ucc.au.uniirc.com quits: @sulix +20:10 -!- Netsplit over, joins: @sulix +--- Log closed Mon Apr 14 20:11:29 2014 +--- Log opened Mon Apr 14 20:18:05 2014 +20:18 -!- matches [matches@motsugo.ucc.gu.uwa.edu.au] has joined #ipdf +20:18 -!- Irssi: #ipdf: Total of 2 nicks [1 ops, 0 halfops, 0 voices, 1 normal] +20:18 -!- Irssi: Join to #ipdf was synced in 0 secs +22:04 < matches> Ergh +22:06 < matches> http://szmoore.net/ghdl.bug +22:06 < matches> Pretty +22:10 < matches> Looks like we'll be sticking with ASCII input files for the FPU +--- Log closed Mon Apr 14 22:29:33 2014 +--- Log opened Mon Apr 14 22:44:34 2014 +22:44 -!- matches [matches@motsugo.ucc.gu.uwa.edu.au] has joined #ipdf +22:44 -!- Irssi: #ipdf: Total of 1 nicks [1 ops, 0 halfops, 0 voices, 0 normal] +22:44 -!- sulix [sulix@motsugo.ucc.gu.uwa.edu.au] has joined #ipdf +22:44 -!- Irssi: Join to #ipdf was synced in 12 secs +22:53 <@matches> Someone's VPS was compromised and killing our network +22:53 <@matches> For reference +22:53 <@matches> It affects this project because +23:07 <@matches> Argh +23:07 <@matches> So I thought I was being really clever +23:07 <@matches> I had files of type "bit" and everything +23:07 <@matches> Guess how a "bit" is represented... +23:08 <@matches> It's an ASCII "0" or "1" +23:09 <@matches> I guess I will just conclude that ASCII strings treated as hex is the only way +--- Day changed Wed Apr 16 2014 +00:10 <@matches> I'm either about to perpetrate horrible things on your nice View class or give up and go to sleep +00:28 <@matches> Yeah... the problem is if we want to overlay objects rendered using different precision's over each other +00:28 <@matches> It leads towards templates +00:29 <@matches> And templates lead towards fear +00:29 <@matches> And fear leads towards anger +00:29 <@matches> And anger leads to hate +00:29 <@matches> I think +00:29 <@matches> Saving an image +00:29 <@matches> Recompiling the program +00:29 <@matches> Overlaying the image +00:29 <@matches> Is going to lead to less hate +00:30 <@matches> Otherwise pretty much every occurance of "Real" needs to be come a template +00:50 < sulix> So there are a couple of problems with doing that. +00:51 < sulix> - You'd need some way of storing objects of different precision. Possibly an extra "high-precision bounds" struct. +00:51 < sulix> - View also uses real for its internal bounds, which is where many of the problems appear. +00:52 < sulix> (I guess you could have a "high-precision viewport" as well.) +00:52 < sulix> - The actual upload of graphics data to OpenGL is done as 32-bit floats, no matter the type of real, as that's all OpenGL supports. +00:53 < sulix> (At some point we'll have to actually do some view transforms on the CPU rather than just passing all of the bounds and viewport straight to OpenGL) +01:02 <@matches> Yeah I don't want to replace Real with templates +01:02 <@matches> That'd be horrible +01:03 <@matches> By the way, the introduction of SDL_Renderer in SDL2 is confusing +01:05 <@matches> I thought it was replacing Surface with Renderer and Texture +01:05 <@matches> But Surface seems to still be a thing +01:13 < sulix> Yeah: basically Surfaces are in CPU memory, textures in GPU memory. +01:13 <@matches> Right +01:14 <@matches> And renderers magically put stuff on surfaces/textures +01:14 < sulix> Yeah. +01:14 < sulix> So it basically represents the graphics card. +01:15 < sulix> But if you want to just use OpenGL yourself, you don't need to create a renderer at all. +01:15 <@matches> Ah, but the plot thickens +01:15 <@matches> I'm saving the window to a bmp +01:16 <@matches> Which requires a renderer +01:16 < sulix> Hmm... I'm not sure if that will work. +01:16 <@matches> It does +01:16 <@matches> It seems rather convoluted though to be honest +01:16 < sulix> (In theory, it shouldn't, but it probably actually does) +01:16 <@matches> I seem to remember it not being this convoluted in SDL1.2 +01:16 <@matches> -_- +01:16 <@matches> So the procedure is +01:17 <@matches> 1. Get a surface associated with the window +01:17 <@matches> 2. Allocate buffer of unsigned char for the pixels +01:17 < sulix> Yeah, TBH I prefer SDL1.2's rendering API, but I generally just use OpenGL anyway. +01:17 <@matches> 3. Get renderer from the window (NB: Don't use SDL_CreateRenderer, only the (undocumented) SDL_GetRenderer works because the Window already has a Renderer because it has been created with an OpenGL flag)... +01:18 < sulix> In theory we should probably use glReadPixels. +01:18 <@matches> 4. Use the magical renderer power to put pixels into the pixel array +01:18 <@matches> 5. Create an RGB surface from the pixel array +01:18 <@matches> 6. Now you can call SDL_SaveBMP, congratulations +01:18 <@matches> What's this about a glReadPixels +01:18 <@matches> I was just about to commit this +01:19 < sulix> Well, you can use glReadPixels instead of steps 1,3 and 4. +01:19 < sulix> (This is what SDL is doing behind the scenes) +01:20 < sulix> Unfortunately, the SDL wiki is still down thanks to heartbleed. :/ +01:20 <@matches> :O +01:20 <@matches> It was up when I looked at it before +01:20 <@matches> Throwing python exceptions when I tried the search function though +01:21 < sulix> Ryan said that it was up, but I'm still getting revoked certificate errors. +01:22 <@matches> Hmm, I needed to do step 1 in order to know the size of the pixel array in step 2... +01:23 < sulix> Screen::ViewportWidth(), Screen::ViewportHeight() +01:26 <@matches> Yeah this is looking a lot shorter than what I had +01:33 <@matches> It doesn't seem to work though +01:35 <@matches> I'm getting a segfault +01:35 <@matches> And of course valgrind automatically exits when it gets more than 1000000 errors from the flgrx driver +01:38 <@matches> First call to glReadPixels is OK but the bmp is just white, second call segfaults +01:39 < sulix> Hmm... what's the call? +01:44 <@matches> Segfault was due to me forgetting about the pixels needing 4 bytes for RGBA +01:44 <@matches> Still white though +01:45 < sulix> (That was going to be my guess) +01:45 <@matches> The advantage of getting the SDL_Surface +01:45 <@matches> Was that you just pass all the surf->format->format->stuff +01:45 <@matches> Everywhere +01:45 <@matches> Also makes it rather verbose +01:46 < sulix> The white screen might just be an fglrx bug. +01:46 <@matches> There we go +01:47 <@matches> No, it helps to remember that the pixels need 4 bytes for RGBA +01:47 <@matches> I have very selective memory +01:47 <@matches> I had to remember it for each line individually +01:47 <@matches> Right I guess it is slightly nicer now +01:47 <@matches> Although it has a bunch of magical "*4" everywhere +01:48 <@matches> I'm going to put this on Stack overflow as an alternative to the answer I was originally following +01:48 < sulix> Well, I'm going to attempt to sleep... +01:48 <@matches> Thank you for fixing my bug without seeing it :S +01:49 < sulix> I have far too much experience breaking glReadPixels... +01:53 <@matches> We need an easy way to compare our document rendering the same thing using a different Real and/or view representation +01:53 <@matches> Templates would only solve changing the Real and really they probably wouldn't actually solve it +01:53 <@matches> They'd just create nightmares +01:53 <@matches> Hmm +01:55 <@matches> Um +01:55 <@matches> Just looking at View::Render +01:55 <@matches> Why is there a seperate loop for each type of object... +01:56 <@matches> With "continue" statements for the other types in each loop +01:56 <@matches> Is this so you can just make one call to glBegin and glEnd... +01:56 <@matches> I am suitable scared +01:57 <@matches> suitably scared and also suitable scared +22:05 <@matches> Ok, trying again. This is the sort of thing a template is supposed to be used for... I just seem to always end up suddenly having to make everything all the way back to Document into a template class :S +22:07 <@matches> blergh +22:07 <@matches> trying again +22:07 <@matches> After getting coffee +22:07 <@matches> I think +22:30 <@matches> Ok, templates is way too complicated +22:30 <@matches> I am going to do the following instead: +22:31 <@matches> 1. Allow a "save this region to bmp" argument +22:31 <@matches> 2. It reads the specified bmp, saves a new bmp with the current view overlayed in a different colour or something +22:32 <@matches> 3. Makefile hacks to recompile the program using a different typedef of Real and then do 1. and 2. for them all +22:32 <@matches> 4. Realise I probably should have used templates +23:02 <@matches> So, according to my timeline that I haven't looked at since submitting the proposal, I will have done a draft literature review by tomorrow... +23:02 <@matches> Hah +--- Day changed Thu Apr 17 2014 +00:26 <@matches> I am not good at OpenGL/SDL +00:26 <@matches> I am the master of producing a black screen +00:26 <@matches> Also we have FILLED and OUTLINE the wrong way round still