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Speed group_texture_runs for two-texture batches.

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codegirl007
2026-08-14 23:08:00 -07:00
parent 9df98ef73d
commit c97a17f85b
2 changed files with 117 additions and 13 deletions
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engine/batching_test.odin
+45
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@@ -190,6 +190,51 @@ group_texture_runs_already_optimal :: proc(t: ^testing.T) {
testing.expect_value(t, marker_of(list[3]), f32(40))
}
@(test)
group_texture_runs_alternating_many_stable :: proc(t: ^testing.T) {
// Characterization: large alternating group must collapse to two runs
// while preserving same-texture submission order (markers).
N :: 64
list := make([]Queued_Sprite, N)
defer delete(list)
for i in 0 ..< N {
tex: uintptr = 2 if (i % 2) == 0 else 1
list[i] = queued(tex, 1, f32(i + 1))
}
testing.expect_value(t, texture_run_count(list), N)
group_texture_runs(list)
testing.expect_value(t, texture_run_count(list), 2)
testing.expect(t, list[0].texture == fake_tex(1))
testing.expect(t, list[N / 2 - 1].texture == fake_tex(1))
testing.expect(t, list[N / 2].texture == fake_tex(2))
testing.expect(t, list[N - 1].texture == fake_tex(2))
for i in 0 ..< N / 2 {
testing.expect_value(t, marker_of(list[i]), f32(2 * i + 2)) // odd markers: 2,4,...,N
testing.expect_value(t, marker_of(list[N / 2 + i]), f32(2 * i + 1)) // even markers: 1,3,...,N-1
}
}
@(test)
group_texture_runs_three_textures_stable :: proc(t: ^testing.T) {
list := []Queued_Sprite {
queued(3, 1, 1),
queued(1, 1, 2),
queued(2, 1, 3),
queued(3, 1, 4),
queued(1, 1, 5),
queued(2, 1, 6),
}
testing.expect_value(t, texture_run_count(list), 6)
group_texture_runs(list)
testing.expect_value(t, texture_run_count(list), 3)
testing.expect_value(t, marker_of(list[0]), f32(2))
testing.expect_value(t, marker_of(list[1]), f32(5))
testing.expect_value(t, marker_of(list[2]), f32(3))
testing.expect_value(t, marker_of(list[3]), f32(6))
testing.expect_value(t, marker_of(list[4]), f32(1))
testing.expect_value(t, marker_of(list[5]), f32(4))
}
@(test)
group_texture_runs_noncontiguous_same_group_id :: proc(t: ^testing.T) {
// Same nonzero id split by group 0: each window regroups alone.