d92de00cc1
This is a fairly fundamental change on how IDs are handled.
It serves many purposes:
- Improve performance. We only need to iterate over IDs which are
relevant at any one time.
- Makes sure we iterate through IDs in SPIR-V module declaration order
rather than ID space. IDs don't have to be monotonically increasing,
which was an assumption SPIRV-Cross used to have. It has apparently
never been a problem until now.
- Support LUTs of structs. We do this by interleaving declaration of
constants and struct types in SPIR-V module order.
To support this, the ParsedIR interface needed to change slightly.
Before setting any ID with variant_set<T> we let ParsedIR know
that an ID with a specific type has been added. The surface for change
should be minimal.
ParsedIR will maintain a per-type list of IDs which the cross-compiler
will need to consider for later.
Instead of looping over ir.ids[] (which can be extremely large), we loop
over types now, using:
ir.for_each_typed_id<SPIRVariable>([&](uint32_t id, SPIRVariable &var) {
handle_variable(var);
});
Now we make sure that we're never looking at irrelevant types.
24 lines
411 B
GLSL
24 lines
411 B
GLSL
#version 310 es
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precision mediump float;
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precision highp int;
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const float _16[4] = float[](1.0, 4.0, 3.0, 2.0);
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struct Foo
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{
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float a;
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float b;
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};
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const Foo _28[2] = Foo[](Foo(10.0, 20.0), Foo(30.0, 40.0));
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layout(location = 0) out vec4 FragColor;
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layout(location = 0) flat in mediump int line;
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void main()
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{
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FragColor = vec4(_16[line]);
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FragColor += vec4(_28[line].a * _28[1 - line].a);
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}
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