9a7a250b62
Pure CPU helper that lays out a group list into a contiguous indirect buffer (DrawElementsIndirectCommand[]) and parallel BatchData[] — opaque section first, transparent section second. Returns counts + byte offset for the transparent section. Tests cover: spec §5 walk-through layout; empty group list edge case; ClipMap classification (treated as opaque, not transparent). Static + public so tests can exercise without a GL context. Task 10 wires it into the rewritten Draw() method. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
94 lines
4 KiB
C#
94 lines
4 KiB
C#
using System.Numerics;
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using AcDream.App.Rendering.Wb;
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using AcDream.Core.Meshing;
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using Xunit;
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namespace AcDream.Core.Tests.Rendering.Wb;
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/// <summary>
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/// Pure CPU test of <see cref="WbDrawDispatcher.BuildIndirectArrays"/>.
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/// Verifies that a synthetic group set lays out into the indirect buffer
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/// + parallel batch data with opaque section first, transparent second,
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/// per-group fields propagated correctly.
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/// </summary>
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public sealed class WbDrawDispatcherIndirectBuilderTests
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{
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[Fact]
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public void TwoOpaqueGroupsAndOneTransparent_LaysOutContiguouslyOpaqueFirst()
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{
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// Arrange — three groups: 2 opaque (12+1 instances) + 1 transparent (12 instances)
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var groups = new List<WbDrawDispatcher.IndirectGroupInput>
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{
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new(IndexCount: 100, FirstIndex: 0, BaseVertex: 0, InstanceCount: 12, FirstInstance: 0, TextureHandle: 0xAA, TextureLayer: 0, Translucency: TranslucencyKind.Opaque),
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new(IndexCount: 200, FirstIndex: 100, BaseVertex: 0, InstanceCount: 12, FirstInstance: 12, TextureHandle: 0xBB, TextureLayer: 0, Translucency: TranslucencyKind.AlphaBlend),
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new(IndexCount: 50, FirstIndex: 300, BaseVertex: 100, InstanceCount: 1, FirstInstance: 24, TextureHandle: 0xCC, TextureLayer: 0, Translucency: TranslucencyKind.Opaque),
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};
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var indirect = new DrawElementsIndirectCommand[16];
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var batch = new WbDrawDispatcher.BatchDataPublic[16];
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// Act
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var result = WbDrawDispatcher.BuildIndirectArrays(groups, indirect, batch);
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// Assert layout
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Assert.Equal(2, result.OpaqueCount);
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Assert.Equal(1, result.TransparentCount);
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Assert.Equal(2 * 20, result.TransparentByteOffset); // sizeof(DEIC) = 20
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// Opaque section, in input order (Task 10 callers sort)
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Assert.Equal(100u, indirect[0].Count);
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Assert.Equal(0u, indirect[0].FirstIndex);
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Assert.Equal(0, indirect[0].BaseVertex);
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Assert.Equal(12u, indirect[0].InstanceCount);
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Assert.Equal(0u, indirect[0].BaseInstance);
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Assert.Equal(50u, indirect[1].Count);
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Assert.Equal(300u, indirect[1].FirstIndex);
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Assert.Equal(100, indirect[1].BaseVertex);
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Assert.Equal(1u, indirect[1].InstanceCount);
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Assert.Equal(24u, indirect[1].BaseInstance);
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// Transparent section
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Assert.Equal(200u, indirect[2].Count);
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Assert.Equal(100u, indirect[2].FirstIndex);
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Assert.Equal(12u, indirect[2].InstanceCount);
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Assert.Equal(12u, indirect[2].BaseInstance);
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// BatchData parallel — same indices as indirect
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Assert.Equal(0xAAul, batch[0].TextureHandle);
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Assert.Equal(0xCCul, batch[1].TextureHandle);
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Assert.Equal(0xBBul, batch[2].TextureHandle);
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}
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[Fact]
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public void EmptyGroupList_ProducesZeroCounts()
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{
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var groups = new List<WbDrawDispatcher.IndirectGroupInput>();
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var indirect = new DrawElementsIndirectCommand[0];
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var batch = new WbDrawDispatcher.BatchDataPublic[0];
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var result = WbDrawDispatcher.BuildIndirectArrays(groups, indirect, batch);
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Assert.Equal(0, result.OpaqueCount);
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Assert.Equal(0, result.TransparentCount);
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Assert.Equal(0, result.TransparentByteOffset);
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}
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[Fact]
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public void ClipMapTreatedAsOpaque()
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{
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// ClipMap surfaces (alpha-cutout) belong with the opaque pass
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// because the discard handles transparency, not blending.
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var groups = new List<WbDrawDispatcher.IndirectGroupInput>
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{
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new(IndexCount: 10, FirstIndex: 0, BaseVertex: 0, InstanceCount: 1, FirstInstance: 0, TextureHandle: 0x1, TextureLayer: 0, Translucency: TranslucencyKind.ClipMap),
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};
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var indirect = new DrawElementsIndirectCommand[4];
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var batch = new WbDrawDispatcher.BatchDataPublic[4];
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var result = WbDrawDispatcher.BuildIndirectArrays(groups, indirect, batch);
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Assert.Equal(1, result.OpaqueCount);
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Assert.Equal(0, result.TransparentCount);
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}
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}
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