Infrastructure: Non-functional: Move to rich description of environment.

StandAlone/StandAlone.cpp

@@ -715,9 +715,27 @@ void CompileAndLinkShaderUnits(std::vector<ShaderCompUnit> compUnits)
         if (Options & EOptionAutoMapLocations)
             shader->setAutoMapLocations(true);
 
+        // Set up the environment, some subsettings take precedence over earlier
+        // ways of setting things.
+        if (Options & EOptionSpv) {
+            if (Options & EOptionVulkanRules) {
+                shader->setEnvInput((Options & EOptionReadHlsl) ? glslang::EShSourceHlsl
+                                                                : glslang::EShSourceGlsl,
+                                        compUnit.stage, glslang::EShClientVulkan, 100);
+                shader->setEnvClient(glslang::EShClientVulkan, 100);
+                shader->setEnvTarget(glslang::EshTargetSpv, 0x00001000);
+            } else {
+                shader->setEnvInput((Options & EOptionReadHlsl) ? glslang::EShSourceHlsl
+                                                                : glslang::EShSourceGlsl,
+                                        compUnit.stage, glslang::EShClientOpenGL, 100);
+                shader->setEnvClient(glslang::EShClientOpenGL, 450);
+                shader->setEnvTarget(glslang::EshTargetSpv, 0x00001000);
+            }
+        }
+
         shaders.push_back(shader);
 
-        const int defaultVersion = Options & EOptionDefaultDesktop? 110: 100;
+        const int defaultVersion = Options & EOptionDefaultDesktop ? 110 : 100;
 
         DirStackFileIncluder includer;
         std::for_each(IncludeDirectoryList.rbegin(), IncludeDirectoryList.rend(), [&includer](const std::string& dir) {

glslang/MachineIndependent/ParseHelper.cpp

@@ -50,7 +50,8 @@ namespace glslang {
 TParseContext::TParseContext(TSymbolTable& symbolTable, TIntermediate& interm, bool parsingBuiltins,
                              int version, EProfile profile, const SpvVersion& spvVersion, EShLanguage language,
                              TInfoSink& infoSink, bool forwardCompatible, EShMessages messages) :
-            TParseContextBase(symbolTable, interm, parsingBuiltins, version, profile, spvVersion, language, infoSink, forwardCompatible, messages),
+            TParseContextBase(symbolTable, interm, parsingBuiltins, version, profile, spvVersion, language,
+                              infoSink, forwardCompatible, messages),
             inMain(false),
             blockName(nullptr),
             limits(resources.limits),

glslang/MachineIndependent/Versions.cpp

@@ -355,9 +355,9 @@ void TParseVersions::getPreamble(std::string& preamble)
     // #define VULKAN XXXX
     const int numberBufSize = 12;
     char numberBuf[numberBufSize];
-    if (spvVersion.vulkan > 0) {
+    if (spvVersion.vulkanGlsl > 0) {
         preamble += "#define VULKAN ";
-        snprintf(numberBuf, numberBufSize, "%d", spvVersion.vulkan);
+        snprintf(numberBuf, numberBufSize, "%d", spvVersion.vulkanGlsl);
         preamble += numberBuf;
         preamble += "\n";
     }

glslang/MachineIndependent/Versions.h

@@ -72,14 +72,19 @@ inline const char* ProfileName(EProfile profile)
 }
 
 //
-// SPIR-V has versions for multiple things; tie them together.
-// 0 means a target or rule set is not enabled.
+// What source rules, validation rules, target language, etc. are needed
+// desired for SPIR-V?
+//
+// 0 means a target or rule set is not enabled (ignore rules from that entity).
+// Non-0 means to apply semantic rules arising from that version of its rule set.
+// The union of all requested rule sets will be applied.
 //
 struct SpvVersion {
-    SpvVersion() : spv(0), vulkan(0), openGl(0) {}
-    unsigned int spv; // the version of the targeted SPIR-V, as defined by SPIR-V in word 1 of the SPIR-V binary header
-    int vulkan;       // the version of semantics for Vulkan; e.g., for GLSL from KHR_vulkan_glsl "#define VULKAN"
-    int openGl;       // the version of semantics for OpenGL; e.g., for GLSL from KHR_vulkan_glsl "#define GL_SPIRV"
+    SpvVersion() : spv(0), vulkanGlsl(0), vulkan(0), openGl(0) {}
+    unsigned int spv; // the version of SPIR-V to target, as defined by "word 1" of the SPIR-V binary header
+    int vulkanGlsl;   // the version of GLSL semantics for Vulkan, from GL_KHR_vulkan_glsl, for "#define VULKAN XXX"
+    int vulkan;       // the version of Vulkan, for which SPIR-V execution environment rules to use (100 means 1.0)
+    int openGl;       // the version of GLSL semantics for OpenGL, from GL_ARB_gl_spirv, for "#define GL_SPIRV XXX"
 };
 
 //

glslang/Public/ShaderLang.h

@@ -110,7 +110,44 @@ typedef enum {
     EShSourceNone,
     EShSourceGlsl,
     EShSourceHlsl,
-} EShSource;          // if EShLanguage were EShStage, this could be EShLanguage instead
+} EShSource;                  // if EShLanguage were EShStage, this could be EShLanguage instead
+
+typedef enum {
+    EShClientNone,
+    EShClientVulkan,
+    EShClientOpenGL,
+} EShClient;
+
+typedef enum {
+    EShTargetNone,
+    EshTargetSpv,
+} EShTargetLanguage;
+
+struct TInputLanguage {
+    EShSource languageFamily; // redundant information with other input, this one overrides when not EShSourceNone
+    EShLanguage stage;        // redundant information with other input, this one overrides when not EShSourceNone
+    EShClient dialect;
+    int dialectVersion;       // version of client's language definition, not the client (when not EShClientNone)
+};
+
+struct TClient {
+    EShClient client;
+    int version;              // version of client itself (not the client's input dialect)
+};
+
+struct TTarget {
+    EShTargetLanguage language;
+    unsigned int version;     // the version to target, if SPIR-V, defined by "word 1" of the SPIR-V binary header
+};
+
+// All source/client/target versions and settings.
+// Can override previous methods of setting, when items are set here.
+// Expected to grow, as more are added, rather than growing parameter lists.
+struct TEnvironment {
+    TInputLanguage input;     // definition of the input language
+    TClient client;           // what client is the overall compilation being done for?
+    TTarget target;           // what to generate
+};
 
 const char* StageName(EShLanguage);
 
@@ -324,6 +361,25 @@ public:
     void setNoStorageFormat(bool useUnknownFormat);
     void setTextureSamplerTransformMode(EShTextureSamplerTransformMode mode);
 
+    // For setting up the environment (initialized in the constructor):
+    void setEnvInput(EShSource lang, EShLanguage stage, EShClient client, int version)
+    {
+        environment.input.languageFamily = lang;
+        environment.input.stage = stage;
+        environment.input.dialect = client;
+        environment.input.dialectVersion = version;
+    }
+    void setEnvClient(EShClient client, int version)
+    {
+        environment.client.client = client;
+        environment.client.version = version;
+    }
+    void setEnvTarget(EShTargetLanguage lang, unsigned int version)
+    {
+        environment.target.language = lang;
+        environment.target.version = version;
+    }
+
     // Interface to #include handlers.
     //
     // To support #include, a client of Glslang does the following:
@@ -463,6 +519,8 @@ protected:
     // a function in the source string can be renamed FROM this TO the name given in setEntryPoint.
     std::string sourceEntryPointName;
 
+    TEnvironment environment;
+
     friend class TProgram;
 
 private: