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Declare R32f HZB image and support chunked GPU culling

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Emil
2026-09-23 22:40:08 +03:00
parent acbe5156c0
commit 43afcd6bfb
2 changed files with 30 additions and 3 deletions
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shaders/gpu_scene.slang
+3 -3
View File
@@ -190,7 +190,7 @@ bool appendDeferred(uint candidateIndex) {
[shader("compute")]
[numthreads(64, 1, 1)]
void gpuCullMain(uint3 dispatchId : SV_DispatchThreadID) {
uint index = dispatchId.x;
uint index = dispatchId.x + cullParameters.reserved0;
if (index >= cullParameters.candidateCount) return;
Candidate candidate = candidates[index];
InstanceRecord instance = cullInstances[candidate.instanceId];
@@ -207,7 +207,7 @@ void gpuCullMain(uint3 dispatchId : SV_DispatchThreadID) {
[shader("compute")]
[numthreads(64, 1, 1)]
void gpuPostCullMain(uint3 dispatchId : SV_DispatchThreadID) {
uint index = dispatchId.x;
uint index = dispatchId.x + cullParameters.reserved0;
if (index >= cullParameters.deferredCapacity || index >= deferredCount[0]) return;
Candidate candidate = candidates[deferredIds[index]];
InstanceRecord instance = cullInstances[candidate.instanceId];
@@ -224,7 +224,7 @@ struct HzbParameters {
};
[[vk::push_constant]] ConstantBuffer<HzbParameters> hzbParameters;
[[vk::binding(0,0)]] Texture2D<float> hzbSource;
[[vk::binding(1,0)]] RWTexture2D<float> hzbOutput;
[[vk::binding(1,0)]] [vk::image_format("r32f")] RWTexture2D<float> hzbOutput;
[shader("compute")]
[numthreads(8, 8, 1)]
void gpuHzbMain(uint3 dispatchId : SV_DispatchThreadID) {
tests/test_shader_reflection.py
+27
View File
@@ -76,6 +76,33 @@ class ReflectionTests(unittest.TestCase):
self.assertEqual([bindings[n]["type"] for n in (7, 8)],
["sampled_image_2d", "sampled_image_2d"])
def test_hzb_storage_image_has_explicit_r32f_format(self):
compiler = os.environ["FASET_TEST_SLANGC"]
with tempfile.TemporaryDirectory(prefix="faset-hzb-format-") as directory:
process = subprocess.run(
[sys.executable, str(SCRIPT), "--compiler", compiler, "--source",
str(SCRIPT.parents[1] / "shaders" / "gpu_scene.slang"), "--entry",
"gpuHzbMain", "--define", "FASET_GPU_HZB=1", "--output", directory],
capture_output=True, text=True,
)
self.assertEqual(process.returncode, 0, process.stderr)
bytecode = (Path(directory) / "gpuHzbMain.spv").read_bytes()
words = struct.unpack(f"<{len(bytecode) // 4}I", bytecode)
capabilities = set()
image_formats = []
offset = 5
while offset < len(words):
count, opcode = words[offset] >> 16, words[offset] & 0xffff
self.assertGreater(count, 0)
if opcode == 17: # OpCapability
capabilities.add(words[offset + 1])
elif opcode == 25: # OpTypeImage; last operand is ImageFormat
image_formats.append((words[offset + 7], words[offset + 8]))
offset += count
self.assertNotIn(55, capabilities) # StorageImageReadWithoutFormat
self.assertNotIn(56, capabilities) # StorageImageWriteWithoutFormat
self.assertIn((2, 3), image_formats) # storage image, R32f
if __name__ == "__main__":
unittest.main()