diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/slang/lower.cpp | 151 |
1 files changed, 137 insertions, 14 deletions
diff --git a/source/slang/lower.cpp b/source/slang/lower.cpp index 9f117106b..d77e573d4 100644 --- a/source/slang/lower.cpp +++ b/source/slang/lower.cpp @@ -1299,17 +1299,20 @@ struct LoweringVisitor RefPtr<ImportDecl> visitImportDecl(ImportDecl* decl) { - // No need to translate things here if we are - // in "full" mode, because we will selectively - // translate the imported declarations at their - // use sites(s). - if (!shared->isRewrite) - return nullptr; - - for (auto dd : decl->importedModuleDecl->Members) - { - translateDeclRef(dd); - } + // We could unconditionally output the declarations in the + // imported code, but this could cause problems if any + // of those declarations used capabilities not allowed + // by the target pipeline stage (e.g., `discard` is + // an error in a GLSL vertex shader file, even if + // it is in a function that never gets called). + // + // As a result, we just ignore the `import` step, + // and allow declarations to be pulled in by + // their use sites. + // + // If this proves to be a problem, we will need + // a pass that resolves which declarations in imported + // modules are "valid" for the chosen target stage. // Don't actually include a representation of // the import declaration in the output @@ -1528,6 +1531,14 @@ struct LoweringVisitor VaryingParameterArraySpec* arraySpecs = nullptr; }; + RefPtr<ExpressionSyntaxNode> createGLSLBuiltinRef( + char const* name) + { + RefPtr<VarExpressionSyntaxNode> globalVarRef = new VarExpressionSyntaxNode(); + globalVarRef->name = name; + return globalVarRef; + } + void lowerSimpleShaderParameterToGLSLGlobal( VaryingParameterInfo const& info, @@ -1567,9 +1578,121 @@ struct LoweringVisitor } else if (ns == "sv_position") { - RefPtr<VarExpressionSyntaxNode> globalVarRef = new VarExpressionSyntaxNode(); - globalVarRef->name = "gl_Position"; - globalVarExpr = globalVarRef; + if (info.direction == VaryingParameterDirection::Input) + { + globalVarExpr = createGLSLBuiltinRef("gl_FragCoord"); + } + else + { + globalVarExpr = createGLSLBuiltinRef("gl_Position"); + } + } + else if (ns == "sv_clipdistance") + { + globalVarExpr = createGLSLBuiltinRef("gl_ClipDistance"); + } + else if (ns == "sv_culldistance") + { + // TODO: ARB_cull_distance + globalVarExpr = createGLSLBuiltinRef("gl_CullDistance"); + } + else if (ns == "sv_coverage") + { + if (info.direction == VaryingParameterDirection::Input) + { + globalVarExpr = createGLSLBuiltinRef("gl_SampleMaskIn"); + } + else + { + globalVarExpr = createGLSLBuiltinRef("gl_SampleMask"); + } + } + else if (ns == "sv_depth") + { + globalVarExpr = createGLSLBuiltinRef("gl_FragDepth"); + } + else if (ns == "sv_depthgreaterequal") + { + // TODO: layout(depth_greater) out float gl_FragDepth; + globalVarExpr = createGLSLBuiltinRef("gl_FragDepth"); + } + else if (ns == "sv_depthlessequal") + { + // TODO: layout(depth_less) out float gl_FragDepth; + globalVarExpr = createGLSLBuiltinRef("gl_FragDepth"); + } + else if (ns == "sv_dispatchthreadid") + { + globalVarExpr = createGLSLBuiltinRef("gl_GlobalInvocationID"); + } + else if (ns == "sv_domainlocation") + { + globalVarExpr = createGLSLBuiltinRef("gl_TessCoord"); + } + else if (ns == "sv_groupid") + { + globalVarExpr = createGLSLBuiltinRef("gl_WorkGroupID"); + } + else if (ns == "sv_groupindex") + { + globalVarExpr = createGLSLBuiltinRef("gl_LocationInvocationIndex"); + } + else if (ns == "sv_groupthreadid") + { + globalVarExpr = createGLSLBuiltinRef("gl_LocalInvocationID"); + } + else if (ns == "sv_gsinstanceid") + { + globalVarExpr = createGLSLBuiltinRef("gl_InvocationID"); + } + else if (ns == "sv_insidetessfactor") + { + globalVarExpr = createGLSLBuiltinRef("gl_TessLevelInner"); + } + else if (ns == "sv_instanceid") + { + globalVarExpr = createGLSLBuiltinRef("gl_InstanceIndex"); + } + else if (ns == "sv_isfrontface") + { + globalVarExpr = createGLSLBuiltinRef("gl_FrontFacing"); + } + else if (ns == "sv_outputcontrolpointid") + { + globalVarExpr = createGLSLBuiltinRef("gl_InvocationID"); + } + else if (ns == "sv_outputcontrolpointid") + { + globalVarExpr = createGLSLBuiltinRef("gl_InvocationID"); + } + else if (ns == "sv_primitiveid") + { + globalVarExpr = createGLSLBuiltinRef("gl_PrimitiveID"); + } + else if (ns == "sv_rendertargetarrayindex") + { + globalVarExpr = createGLSLBuiltinRef("gl_Layer"); + } + else if (ns == "sv_sampleindex") + { + globalVarExpr = createGLSLBuiltinRef("gl_SampleID"); + } + else if (ns == "sv_stencilref") + { + // TODO: ARB_shader_stencil_export + globalVarExpr = createGLSLBuiltinRef("gl_SampleID"); + } + else if (ns == "sv_tessfactor") + { + globalVarExpr = createGLSLBuiltinRef("gl_TessLevelOuter"); + } + else if (ns == "sv_vertexid") + { + globalVarExpr = createGLSLBuiltinRef("gl_VertexIndex"); + } + else if (ns == "sv_viewportarrayindex") + { + globalVarExpr = createGLSLBuiltinRef("gl_ViewportIndex"); } else { |