summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/angle/src/compiler/ShHandle.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/3rdparty/angle/src/compiler/ShHandle.h')
-rw-r--r--src/3rdparty/angle/src/compiler/ShHandle.h142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/ShHandle.h b/src/3rdparty/angle/src/compiler/ShHandle.h
new file mode 100644
index 0000000000..6ba302ad04
--- /dev/null
+++ b/src/3rdparty/angle/src/compiler/ShHandle.h
@@ -0,0 +1,142 @@
+//
+// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef _SHHANDLE_INCLUDED_
+#define _SHHANDLE_INCLUDED_
+
+//
+// Machine independent part of the compiler private objects
+// sent as ShHandle to the driver.
+//
+// This should not be included by driver code.
+//
+
+#include "GLSLANG/ShaderLang.h"
+
+#include "compiler/BuiltInFunctionEmulator.h"
+#include "compiler/ExtensionBehavior.h"
+#include "compiler/InfoSink.h"
+#include "compiler/SymbolTable.h"
+#include "compiler/VariableInfo.h"
+
+class LongNameMap;
+class TCompiler;
+class TDependencyGraph;
+
+//
+// Helper function to identify specs that are based on the WebGL spec,
+// like the CSS Shaders spec.
+//
+bool isWebGLBasedSpec(ShShaderSpec spec);
+
+//
+// The base class used to back handles returned to the driver.
+//
+class TShHandleBase {
+public:
+ TShHandleBase();
+ virtual ~TShHandleBase();
+ virtual TCompiler* getAsCompiler() { return 0; }
+
+protected:
+ // Memory allocator. Allocates and tracks memory required by the compiler.
+ // Deallocates all memory when compiler is destructed.
+ TPoolAllocator allocator;
+};
+
+//
+// The base class for the machine dependent compiler to derive from
+// for managing object code from the compile.
+//
+class TCompiler : public TShHandleBase {
+public:
+ TCompiler(ShShaderType type, ShShaderSpec spec);
+ virtual ~TCompiler();
+ virtual TCompiler* getAsCompiler() { return this; }
+
+ bool Init(const ShBuiltInResources& resources);
+ bool compile(const char* const shaderStrings[],
+ const int numStrings,
+ int compileOptions);
+
+ // Get results of the last compilation.
+ TInfoSink& getInfoSink() { return infoSink; }
+ const TVariableInfoList& getAttribs() const { return attribs; }
+ const TVariableInfoList& getUniforms() const { return uniforms; }
+ int getMappedNameMaxLength() const;
+
+protected:
+ ShShaderType getShaderType() const { return shaderType; }
+ ShShaderSpec getShaderSpec() const { return shaderSpec; }
+ // Initialize symbol-table with built-in symbols.
+ bool InitBuiltInSymbolTable(const ShBuiltInResources& resources);
+ // Clears the results from the previous compilation.
+ void clearResults();
+ // Return true if function recursion is detected.
+ bool detectRecursion(TIntermNode* root);
+ // Rewrites a shader's intermediate tree according to the CSS Shaders spec.
+ void rewriteCSSShader(TIntermNode* root);
+ // Returns true if the given shader does not exceed the minimum
+ // functionality mandated in GLSL 1.0 spec Appendix A.
+ bool validateLimitations(TIntermNode* root);
+ // Collect info for all attribs and uniforms.
+ void collectAttribsUniforms(TIntermNode* root);
+ // Map long variable names into shorter ones.
+ void mapLongVariableNames(TIntermNode* root);
+ // Translate to object code.
+ virtual void translate(TIntermNode* root) = 0;
+ // Returns true if, after applying the packing rules in the GLSL 1.017 spec
+ // Appendix A, section 7, the shader does not use too many uniforms.
+ bool enforcePackingRestrictions();
+ // Returns true if the shader passes the restrictions that aim to prevent timing attacks.
+ bool enforceTimingRestrictions(TIntermNode* root, bool outputGraph);
+ // Returns true if the shader does not use samplers.
+ bool enforceVertexShaderTimingRestrictions(TIntermNode* root);
+ // Returns true if the shader does not use sampler dependent values to affect control
+ // flow or in operations whose time can depend on the input values.
+ bool enforceFragmentShaderTimingRestrictions(const TDependencyGraph& graph);
+ // Get built-in extensions with default behavior.
+ const TExtensionBehavior& getExtensionBehavior() const;
+
+ const BuiltInFunctionEmulator& getBuiltInFunctionEmulator() const;
+
+private:
+ ShShaderType shaderType;
+ ShShaderSpec shaderSpec;
+
+ int maxUniformVectors;
+
+ // Built-in symbol table for the given language, spec, and resources.
+ // It is preserved from compile-to-compile.
+ TSymbolTable symbolTable;
+ // Built-in extensions with default behavior.
+ TExtensionBehavior extensionBehavior;
+
+ BuiltInFunctionEmulator builtInFunctionEmulator;
+
+ // Results of compilation.
+ TInfoSink infoSink; // Output sink.
+ TVariableInfoList attribs; // Active attributes in the compiled shader.
+ TVariableInfoList uniforms; // Active uniforms in the compiled shader.
+
+ // Cached copy of the ref-counted singleton.
+ LongNameMap* longNameMap;
+};
+
+//
+// This is the interface between the machine independent code
+// and the machine dependent code.
+//
+// The machine dependent code should derive from the classes
+// above. Then Construct*() and Delete*() will create and
+// destroy the machine dependent objects, which contain the
+// above machine independent information.
+//
+TCompiler* ConstructCompiler(
+ ShShaderType type, ShShaderSpec spec, ShShaderOutput output);
+void DeleteCompiler(TCompiler*);
+
+#endif // _SHHANDLE_INCLUDED_