Merge pull request #641 from chaoc/passthrough

Add support for SPV_NV_geometry_shader_passthrough

Test/baseResults/spv.GeometryShaderPassthrough.geom.out

@@ -0,0 +1,46 @@
+spv.GeometryShaderPassthrough.geom
+Warning, version 450 is not yet complete; most version-specific features are present, but some are missing.
+
+// Module Version 10000
+// Generated by (magic number): 80001
+// Id's are bound by 15
+
+                              Capability Geometry
+                              Capability GeometryShaderPassthroughNV
+                              Extension  "SPV_NV_geometry_shader_passthrough"
+               1:             ExtInstImport  "GLSL.std.450"
+                              MemoryModel Logical GLSL450
+                              EntryPoint Geometry 4  "main" 10 14
+                              ExecutionMode 4 Triangles
+                              ExecutionMode 4 Invocations 1
+                              ExecutionMode 4 OutputVertices
+                              Source GLSL 450
+                              SourceExtension  "GL_NV_geometry_shader_passthrough"
+                              Name 4  "main"
+                              Name 8  "gl_PerVertex"
+                              MemberName 8(gl_PerVertex) 0  "gl_Position"
+                              Name 10  ""
+                              Name 12  "Inputs"
+                              MemberName 12(Inputs) 0  "texcoord"
+                              MemberName 12(Inputs) 1  "baseColor"
+                              Name 14  ""
+                              MemberDecorate 8(gl_PerVertex) 0 BuiltIn Position
+                              Decorate 8(gl_PerVertex) Block
+                              Decorate 10 PassthroughNV
+                              Decorate 12(Inputs) Block
+                              Decorate 14 PassthroughNV
+               2:             TypeVoid
+               3:             TypeFunction 2
+               6:             TypeFloat 32
+               7:             TypeVector 6(float) 4
+ 8(gl_PerVertex):             TypeStruct 7(fvec4)
+               9:             TypePointer Input 8(gl_PerVertex)
+              10:      9(ptr) Variable Input
+              11:             TypeVector 6(float) 2
+      12(Inputs):             TypeStruct 11(fvec2) 7(fvec4)
+              13:             TypePointer Input 12(Inputs)
+              14:     13(ptr) Variable Input
+         4(main):           2 Function None 3
+               5:             Label
+                              Return
+                              FunctionEnd

Test/spv.GeometryShaderPassthrough.geom

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+#version 450
+#extension GL_NV_geometry_shader_passthrough : require
+
+layout(triangles) in;
+
+layout(passthrough) in gl_PerVertex {
+    vec4 gl_Position;
+};
+
+layout(passthrough) in Inputs {
+vec2 texcoord;
+vec4 baseColor;
+};
+
+void main()
+{
+}