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vsm: refactor page-hor-merge in separated shader
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| #version 450 | ||
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| #extension GL_GOOGLE_include_directive : enable | ||
| #extension GL_ARB_separate_shader_objects : enable | ||
| #extension GL_EXT_samplerless_texture_functions : enable | ||
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| #include "virtual_shadow/vsm_common.glsl" | ||
| #include "scene.glsl" | ||
| #include "common.glsl" | ||
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| layout(local_size_x = 32, local_size_y = 32) in; | ||
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| layout(binding = 0, std430) buffer Pages { VsmHeader header; uint pageList[]; } vsm; | ||
| layout(binding = 1, r32ui) uniform uimage3D pageTbl; | ||
| layout(binding = 2, r32ui) uniform uimage2D dbg; | ||
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| const uint NumThreads = gl_WorkGroupSize.x*gl_WorkGroupSize.y*gl_WorkGroupSize.z; | ||
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| shared uint pageListSize; | ||
| shared uint pageList[VSM_MAX_PAGES]; | ||
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| void provokingPage(uint lane) { | ||
| const uint row = lane/VSM_PAGE_TBL_SIZE; | ||
| const uint col = lane%VSM_PAGE_TBL_SIZE; | ||
| const uint p = vsm.pageList[lane]; | ||
| const uint sz = unpackVsmPageSize(p).x; | ||
| const ivec3 at = unpackVsmPageInfo(p); | ||
| if(sz<=0) | ||
| return; | ||
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| if(col==0) { | ||
| uint id = atomicAdd(pageListSize, 1); | ||
| pageList[id] = lane; | ||
| return; | ||
| } | ||
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| if(col<sz.x) | ||
| return; | ||
| //return; | ||
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| const uint p1 = vsm.pageList[lane-sz.x]; | ||
| const uint sz1 = unpackVsmPageSize(p1).x; | ||
| const ivec3 at1 = unpackVsmPageInfo(p1); | ||
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| if(sz==sz1 && at1+ivec3(sz,0,0)==at) | ||
| return; | ||
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| uint id = atomicAdd(pageListSize, 1); | ||
| pageList[id] = lane; | ||
| } | ||
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| void main() { | ||
| const uint lane = gl_LocalInvocationIndex; | ||
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| pageListSize = 0; | ||
| barrier(); | ||
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| // provoking pages | ||
| if(lane < vsm.header.pageCount) | ||
| provokingPage(lane); | ||
| barrier(); | ||
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| //vsm.header.counterM = pageListSize; | ||
| if(lane < pageListSize) { | ||
| //uint id = pageList[lane]; | ||
| //vsm.pageList[id] = 0; | ||
| } | ||
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| if(lane >= pageListSize) | ||
| return; | ||
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| uint pId = pageList[lane]; | ||
| const uint row = pId/VSM_PAGE_TBL_SIZE; | ||
| const uint col = pId%VSM_PAGE_TBL_SIZE; | ||
| const uint p0 = vsm.pageList[pId]; | ||
| const uint off = row*VSM_PAGE_TBL_SIZE; | ||
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| uint sz = unpackVsmPageSize(p0).x; | ||
| ivec3 at = unpackVsmPageInfo(p0); | ||
| uint size = sz; | ||
| for(uint i=col+sz; i<VSM_PAGE_TBL_SIZE; i+=sz) { | ||
| const uint pId1 = off+i; | ||
| const uint p1 = vsm.pageList[pId1]; | ||
| const uint sz1 = unpackVsmPageSize(p1).x; | ||
| const ivec3 at1 = unpackVsmPageInfo(p1); | ||
| if(sz!=sz1 || at+uvec3(size,0,0)!=at1) | ||
| break; | ||
| if(size+sz>=16) { | ||
| // restart stripe | ||
| vsm.pageList[pId] = packVsmPageInfo(at, ivec2(size, sz)); | ||
| pId = pId1; | ||
| sz = sz1; | ||
| at = at1; | ||
| size = sz1; | ||
| continue; | ||
| } | ||
| vsm.pageList[pId1] = 0; | ||
| size += sz; | ||
| } | ||
| vsm.pageList[pId] = packVsmPageInfo(at, ivec2(size, sz)); | ||
| } |