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Optimize Global Surface Atlas drawing when atlas is full

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This commit is contained in:
Wojtek Figat
2024-06-13 23:02:20 +02:00
parent f02e7d0936
commit e3f0991805
1 changed files with 7 additions and 2 deletions
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9
Source/Engine/Renderer/GI/GlobalSurfaceAtlasPass.cpp
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@@ -109,6 +109,7 @@ class GlobalSurfaceAtlasCustomBuffer : public RenderBuffers::CustomBuffer, publi
{
public:
int32 Resolution = 0;
int32 AtlasPixelsTotal = 0;
int32 AtlasPixelsUsed = 0;
uint64 LastFrameAtlasInsertFail = 0;
uint64 LastFrameAtlasDefragmentation = 0;
@@ -394,6 +395,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
INIT_ATLAS_TEXTURE(AtlasDepth, PixelFormat::D16_UNorm);
#undef INIT_ATLAS_TEXTURE
surfaceAtlasData.Resolution = resolution;
surfaceAtlasData.AtlasPixelsTotal = resolution * resolution;
if (!surfaceAtlasData.ChunksBuffer)
{
surfaceAtlasData.ChunksBuffer = GPUDevice::Instance->CreateBuffer(TEXT("GlobalSurfaceAtlas.ChunksBuffer"));
@@ -409,7 +411,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
constexpr float maxUsageToDefrag = 0.8f;
if (currentFrame - surfaceAtlasData.LastFrameAtlasInsertFail < 10 &&
currentFrame - surfaceAtlasData.LastFrameAtlasDefragmentation > 60 &&
(float)surfaceAtlasData.AtlasPixelsUsed / (resolution * resolution) < maxUsageToDefrag)
(float)surfaceAtlasData.AtlasPixelsUsed / surfaceAtlasData.AtlasPixelsTotal < maxUsageToDefrag)
{
surfaceAtlasData.ClearObjects();
}
@@ -1231,7 +1233,10 @@ void GlobalSurfaceAtlasPass::RasterizeActor(Actor* actor, void* actorObject, con
}
// Insert tile into atlas
auto* tile = surfaceAtlasData.AtlasTiles->Insert(tileResolution, tileResolution, 0, &surfaceAtlasData, actorObject, tileIndex);
uint16 tilePixels = tileResolution * tileResolution;
GlobalSurfaceAtlasTile* tile = nullptr;
if (tilePixels <= surfaceAtlasData.AtlasPixelsTotal - surfaceAtlasData.AtlasPixelsUsed)
tile = surfaceAtlasData.AtlasTiles->Insert(tileResolution, tileResolution, 0, &surfaceAtlasData, actorObject, tileIndex);
if (tile)
{
if (!object)