mirror of
https://github.com/KhronosGroup/glslang
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0840838d17
Fix issue #163, support creation and reference of composite type specialization constants. e.g.: ``` layout(constant_id = 200) const float myfloat = 1.25; layout(constant_id = 201) const int myint = 14; struct structtype { float f; int i; }; const structtype outer_struct_var = {myfloat, myint}; void main(){} ``` generated code (use glslangValidator): ``` // Module Version 10000 // Generated by (magic number): 80001 // Id's are bound by 12 Capability Shader 1: ExtInstImport "GLSL.std.450" MemoryModel Logical GLSL450 EntryPoint Vertex 4 "main" Source GLSL 450 Name 4 "main" Name 10 "structtype" MemberName 10(structtype) 0 "f" MemberName 10(structtype) 1 "i" Decorate 7 SpecId 200 Decorate 9 SpecId 201 2: TypeVoid 3: TypeFunction 2 6: TypeFloat 32 7: 6(float) SpecConstant 1067450368 8: TypeInt 32 1 9: 8(int) SpecConstant 14 10(structtype): TypeStruct 6(float) 8(int) 11:10(structtype) SpecConstantComposite 7 9 4(main): 2 Function None 3 5: Label Return FunctionEnd ``` Rname two function names to match their functionalities. 1) Rename `GlslangToSpvTraverser::createSpvSpecConstant()` to `createSpvConstant()`; 2) Rename `GlslangToSpvTraverser::createSpvConstant()` to `createSpvConstantFromConstUnionArray()` Add function `GlslangToSpvTraverser::createSpvConstantFromSubTree()` to handle constant creation from sub trees (e.g.: specialization constants). Related PR: #208
94 lines
2.7 KiB
GLSL
94 lines
2.7 KiB
GLSL
#version 450
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// constant_id specified scalar spec constants
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layout(constant_id = 200) const int spec_int = 3;
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layout(constant_id = 201) const float spec_float = 3.14;
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layout(constant_id = 202) const
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double spec_double = 3.1415926535897932384626433832795;
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layout(constant_id = 203) const bool spec_bool = true;
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const float cast_spec_float = float(spec_float);
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// Flat struct
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struct flat_struct {
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int i;
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float f;
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double d;
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bool b;
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};
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// Nesting struct
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struct nesting_struct {
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flat_struct nested;
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vec4 v;
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int i;
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};
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// Expect OpSpecConstantComposite
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// Flat struct initializer
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const flat_struct spec_flat_struct_all_spec = {spec_int, spec_float,
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spec_double, spec_bool};
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const flat_struct spec_flat_struct_partial_spec = {30, 30.14, spec_double,
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spec_bool};
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// Nesting struct initializer
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const nesting_struct nesting_struct_ctor = {
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{spec_int, spec_float, spec_double, false},
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vec4(0.1, 0.1, 0.1, 0.1),
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spec_int};
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// Vector constructor
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const vec4 spec_vec4_all_spec =
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vec4(spec_float, spec_float, spec_float, spec_float);
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const vec4 spec_vec4_partial_spec =
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vec4(spec_float, spec_float, 300.14, 300.14);
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// Struct nesting constructor
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const nesting_struct spec_nesting_struct_all_spec = {
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spec_flat_struct_all_spec, spec_vec4_all_spec, spec_int};
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const nesting_struct spec_nesting_struct_partial_spec = {
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spec_flat_struct_partial_spec, spec_vec4_partial_spec, 3000};
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const float spec_float_array[5] = {spec_float, spec_float, 1.0, 2.0, 3.0};
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const int spec_int_array[5] = {spec_int, spec_int, 1, 2, 30};
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// global_vec4_array_with_spec_length is not a spec constant, but its array
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// size is. When calling global_vec4_array_with_spec_length.length(), A
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// TIntermSymbol Node shoule be returned, instead of a TIntermConstantUnion
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// node which represents a known constant value.
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in vec4 global_vec4_array_with_spec_length[spec_int];
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out vec4 color;
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void refer_primary_spec_const() {
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if (spec_bool) color *= spec_int;
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}
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void refer_composite_spec_const() {
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color += spec_vec4_all_spec;
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color -= spec_vec4_partial_spec;
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}
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void refer_copmosite_dot_dereference() {
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color *= spec_nesting_struct_all_spec.i;
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color += spec_vec4_all_spec.x;
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}
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void refer_composite_bracket_dereference() {
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color -= spec_float_array[1];
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color /= spec_int_array[spec_int_array[spec_int]];
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}
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int refer_spec_const_array_length() {
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int len = global_vec4_array_with_spec_length.length();
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return len;
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}
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void declare_spec_const_in_func() {
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const nesting_struct spec_const_declared_in_func = {
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spec_flat_struct_partial_spec, spec_vec4_partial_spec, 10};
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color /= spec_const_declared_in_func.i;
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}
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void main() {}
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