February 17, 2018 
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ZZZzzz…)[22:12:15] *** slime <slime!~slime73@blk-215-81-93.eastlink.ca> has joined ##vulkan[22:19:37] *** davr0s <davr0s!~textual@host86-147-196-14.range86-147.btcentralplus.com> has joined ##vulkan[22:19:41] *** davr0s <davr0s!~textual@host86-147-196-14.range86-147.btcentralplus.com> has quit IRC (Client Quit)[22:20:27] *** sla_ro|master <sla_ro|master!~sla.ro@78.96.209.89> has quit IRC ()[22:30:07] *** davr0s <davr0s!~textual@host86-147-196-14.range86-147.btcentralplus.com> has joined ##vulkan[22:34:10] <afl_ext> is clearing neccessary?[22:34:21] <afl_ext> clearing the attachment before rendering in renderpass[22:34:45] <sharpneli> It's as necessary as in OpenGL[22:34:53] <afl_ext> so i think it is not[22:34:59] <sharpneli> If you don't clear any fragments you didn't write have undefined values[22:35:23] <afl_ext> i have a compute shader that "clears" to very specific thing[22:35:29] <afl_ext> and then renderpass throws it away :d[22:35:37] <afl_ext> all should be defined[22:35:39] <afl_ext> lets see[22:35:50] <sharpneli> If you don't have to clear that's an optimization[22:35:53] <afl_ext> im already pulling my hair with blending[22:36:01] <sharpneli> That's why you can define the load op as nocare in renderpass[22:37:05] <afl_ext> laod op in render pass?[22:37:30] <afl_ext> in what struct is that located?[22:37:48] <baldurk> VkAttachmentDescription::loadOp[22:38:03] <baldurk> LOAD/CLEAR/DONT_CARE[22:38:16] <sharpneli> in fact you must define a loadop[22:38:21] <sharpneli> Otherwise you cannot draw anything[22:38:26] <afl_ext> okay[22:39:29] <afl_ext> yeah thats what validation say, if i have loadop clear then putting 0 clear values is a crash[22:39:54] <sharpneli> Obv. You told it to clear and you didn't provide any values[22:42:56] <afl_ext> now i have disco flickering because of no synchronizaion[22:42:58] <afl_ext> but thats better[22:43:29] <sharpneli> Just put megabarriers in between everything[22:47:02] *** cheako <cheako!~cheako@2601:440:4100:4d1f::834> has quit IRC (Ping timeout: 252 seconds)[22:48:02] *** slime <slime!~slime73@blk-215-81-93.eastlink.ca> has quit IRC (Quit: This computer has gone to sleep)[22:48:40] <afl_ext> eeeehh nooo load op dont care is not that i should have[22:48:45] <afl_ext> i fill the texture before rendering[22:48:52] <afl_ext> so i just need to not clear, not dont care[22:49:04] <baldurk> then LOAD_OP_LOAD[22:49:04] <afl_ext> VK_ATTACHMENT_LOAD_OP_LOAD?[22:49:30] <baldurk> it's more expensive than a clear but if you have important data in the attachments its your only option[22:50:04] *** slime <slime!~slime73@24.215.81.93> has joined ##vulkan[22:52:52] *** afl_ext2 <afl_ext2!~afl_ext@unaffiliated/afl-ext/x-2796036> has joined ##vulkan[22:56:50] *** afl_ext <afl_ext!~afl_ext@unaffiliated/afl-ext/x-2796036> has quit IRC (Ping timeout: 268 seconds)[22:57:06] *** Kingsquee <Kingsquee!~kingsquee@d108-180-237-219.bchsia.telus.net> has joined ##vulkan[22:58:21] <afl_ext2> okay now i have no idea whats going wrong, even vkDeviceWaitIdle betwewn things doesnt work[22:59:18] <afl_ext2> the action is as follows: I draw some thousands instances of things into a rgba16f texture, then I need to blit this texture into anotther texture but set alpha to 1 (i know it can be done with some blit command but for now i use compute shader)[22:59:42] <afl_ext2> so the compute shader have 2 storage images bound, readonly and writeonly ones, i read from the first and imagestore into the second[22:59:49] <afl_ext2> result is flickering and broken colors o.O[23:00:00] <afl_ext2> but if I dont imageLoad but save some thing like red color it works fine[23:00:13] <afl_ext2> so the load from the previously drawn texture doesnt work propertly[23:01:12] <afl_ext2> suprisingly if i read only alpha from that source texture it works but its probably just accident[23:03:51] <afl_ext2> lets update vulkan then[23:04:03] <fgarnier> hard to tell what it could be, could be incorrect layout, could be missing memory barrier[23:04:06] <fgarnier> or wrong access masks[23:04:15] <fgarnier> validation layers not helping?[23:04:41] <afl_ext2> validation layer is telling me something that when googled told me that this is a bug in validation layer and is resolved now[23:04:47] <afl_ext2> so im updating vulkan sdk now[23:04:57] <fgarnier> i'd recommend to use build the layers from source[23:05:02] <fgarnier> and use that, more up to date[23:05:18] <afl_ext2> is that hell on windows?[23:06:24] <fgarnier> you need cmake and a few other things, if it's too much hassle, vulkan sdk will be fine[23:12:36] *** borkr <borkr!~borkr@static130-244.mimer.net> has quit IRC (Ping timeout: 256 seconds)[23:29:31] *** echotangoecho <echotangoecho!~echotango@92-108-127-60.cable.dynamic.v4.ziggo.nl> has quit IRC (Quit: Lost terminal)[23:29:59] <afl_ext2> i give up i will need to do it with graphics pipeline not with compute shader because thats the problem there for sure[23:30:20] <afl_ext2> ah fak[23:30:22] <afl_ext2> last resort[23:30:25] *** Biolunar <Biolunar!Biolunar@p5B148076.dip0.t-ipconnect.de> has quit IRC (Ping timeout: 248 seconds)[23:31:48] *** hanna <hanna!~haasn@HSI-KBW-149-172-171-181.hsi13.kabel-badenwuerttemberg.de> has joined ##vulkan[23:43:34] <afl_ext2> yeah so now the poroblem is limited to only 1 part[23:44:22] *** afl_ext2 <afl_ext2!~afl_ext@unaffiliated/afl-ext/x-2796036> has quit IRC (Quit: Leaving)