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phase(N.5) Task 7: dispatcher SSBO + indirect buffer infrastructure

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Adds DrawElementsIndirectCommand struct (20-byte layout for
glMultiDrawElementsIndirect). Replaces _instanceVbo field on
WbDrawDispatcher with three buffers: _instanceSsbo (mat4[]),
_batchSsbo (BatchData[]), _indirectBuffer (DEIC[]). Adds BindlessSupport
constructor parameter — non-null required since the dispatcher is only
constructed when WB foundation is on (which implies bindless is present
per Task 6 capability detection).

Existing Draw() method substitutes _instanceVbo -> _instanceSsbo for
compile. Behavior is temporarily wrong (SSBO bound as ArrayBuffer for
per-vertex attribs); Tasks 9-10 fully rewrite the draw loop and the
per-frame uploads to use BindBufferBase + glMultiDrawElementsIndirect.

GameWindow construction site updated to add _bindlessSupport guard and
pass it as the new last argument to the constructor. Dispatcher is only
constructed when bindless is guaranteed present.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-08 20:25:29 +02:00
parent 12170f9d78
commit 86c471d2d1
3 changed files with 63 additions and 8 deletions
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5
src/AcDream.App/Rendering/GameWindow.cs
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@ -1524,10 +1524,11 @@ public sealed class GameWindow : IDisposable
_staticMesh = new InstancedMeshRenderer(_gl, _meshShader, _textureCache, _wbMeshAdapter);
if (AcDream.App.Rendering.Wb.WbFoundationFlag.IsEnabled
&& _wbMeshAdapter is not null && _wbEntitySpawnAdapter is not null)
&& _wbMeshAdapter is not null && _wbEntitySpawnAdapter is not null
&& _bindlessSupport is not null)
{
_wbDrawDispatcher = new AcDream.App.Rendering.Wb.WbDrawDispatcher(
_gl, _meshShader, _textureCache, _wbMeshAdapter, _wbEntitySpawnAdapter);
_gl, _meshShader, _textureCache, _wbMeshAdapter, _wbEntitySpawnAdapter, _bindlessSupport);
}
// Phase G.1 sky renderer — its own shader (sky.vert / sky.frag)