1 files changed, 132 insertions, 0 deletions
diff --git a/tests/compute/interface-shader-param4.slang b/tests/compute/interface-shader-param4.slang
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+++ b/tests/compute/interface-shader-param4.slang
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+// interface-shader-param3.slang
+
+// This test builds on `interface-shader-param3.slang` by putting
+// resources into the concrete types that satisfy interface-type
+// shader parameters.
+//
+
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute
+
+// A lot of the setup is the same as for `interface-shader-param`,
+// so look there if you want the comments.
+
+interface IRandomNumberGenerator
+{
+    [mutating]
+    int randomInt();
+}
+
+interface IRandomNumberGenerationStrategy
+{
+    associatedtype Generator : IRandomNumberGenerator;
+    Generator makeGenerator(int seed);
+}
+
+interface IModifier
+{
+    int modify(int val);
+}
+
+int test(
+    int                             seed,
+    IRandomNumberGenerationStrategy inStrategy,
+    IModifier                       modifier)
+{
+    let strategy = inStrategy;
+    var generator = strategy.makeGenerator(seed);
+    let unused = generator.randomInt();
+    let val = generator.randomInt();
+    let modifiedVal = modifier.modify(val);
+    return modifiedVal;
+}
+
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):dxbinding(0),glbinding(0),out
+RWStructuredBuffer<int> gOutputBuffer;
+
+ConstantBuffer<IRandomNumberGenerationStrategy> gStrategy;
+
+[numthreads(4, 1, 1)]
+void computeMain(
+
+// Similarly to the previous test, we are declaring two `uniform`
+// paameters on the entry point, where one will be plugged in
+// with a concrete type, and thus get laid out second.
+//
+    uniform IModifier   modifier,
+    uniform int         extra,
+//
+// The uniform/ordinary data for these two parameters will end
+// up in the constant buffers, so let's declare that. Unlike
+// the previous test, the concrete type plugged in for `modifier`
+// has no uniform/ordinary data, so we don't need to fill it in.
+//
+//TEST_INPUT:cbuffer(data=[256]):dxbinding(0),glbinding(2)
+
+            uint3       dispatchThreadID : SV_DispatchThreadID)
+{
+    let tid = dispatchThreadID.x;
+
+    let inputVal : int = tid;
+    let outputVal = test(inputVal, gStrategy, modifier)
+    	+ extra*extra;
+
+    gOutputBuffer[tid] = outputVal;
+}
+
+// Okay, now we get to the part that is unique starting
+// in this test: we add data to the concrete types
+// that we will use as parameters.
+
+struct MyStrategy : IRandomNumberGenerationStrategy
+{
+	RWStructuredBuffer<int> globalSeeds;
+
+    struct Generator : IRandomNumberGenerator
+    {
+        int state;
+
+        [mutating]
+        int randomInt()
+        {
+            return state++;
+        }
+    }
+
+    Generator makeGenerator(int seed)
+    {
+        Generator generator = { globalSeeds[seed] };
+        return generator;
+    }
+}
+
+struct MyModifier : IModifier
+{
+	RWStructuredBuffer<int> localModifiers;
+
+    int modify(int val)
+    {
+        return val ^ localModifiers[val & 3];
+    }
+}
+
+//TEST_INPUT: globalExistentialType MyStrategy
+//TEST_INPUT: entryPointExistentialType MyModifier
+
+// The concrete types we plug in for `gStrategy` and `modifier`
+// have buffer resources in them, so we need to assign them
+// data. The registers/bindings for these parameters will
+// always come after all other shader parameters, and their
+// relative order will match the relative order of their
+// declarations in the global order that Slang uses for
+// assigning bindings (all globals before all entry point parameters).
+//
+// Here's the data for `gStrategy`:
+//
+//TEST_INPUT:ubuffer(data=[1 2 4 8], stride=4):dxbinding(1),glbinding(1)
+//
+// Here's the data for `modifier`:
+//
+//TEST_INPUT:ubuffer(data=[16 32 64 128], stride=4):dxbinding(2),glbinding(3)