diff options
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.cpp | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.cpp b/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.cpp deleted file mode 100644 index ce9828f1f9..0000000000 --- a/src/3rdparty/angle/src/compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.cpp +++ /dev/null @@ -1,221 +0,0 @@ -// -// Copyright (c) 2017 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. -// -// Applies the necessary AST transformations to support multiview rendering through instancing. -// Check the header file For more information. -// - -#include "compiler/translator/DeclareAndInitBuiltinsForInstancedMultiview.h" - -#include "compiler/translator/FindMain.h" -#include "compiler/translator/InitializeVariables.h" -#include "compiler/translator/IntermNode_util.h" -#include "compiler/translator/IntermTraverse.h" -#include "compiler/translator/SymbolTable.h" -#include "compiler/translator/util.h" - -namespace sh -{ - -namespace -{ - -class ReplaceVariableTraverser : public TIntermTraverser -{ - public: - ReplaceVariableTraverser(const TString &symbolName, TIntermSymbol *newSymbol) - : TIntermTraverser(true, false, false), mSymbolName(symbolName), mNewSymbol(newSymbol) - { - } - - void visitSymbol(TIntermSymbol *node) override - { - TName &name = node->getName(); - if (name.getString() == mSymbolName) - { - queueReplacement(mNewSymbol->deepCopy(), OriginalNode::IS_DROPPED); - } - } - - private: - TString mSymbolName; - TIntermSymbol *mNewSymbol; -}; - -TIntermSymbol *CreateGLInstanceIDSymbol(const TSymbolTable &symbolTable) -{ - return ReferenceBuiltInVariable("gl_InstanceID", symbolTable, 300); -} - -// Adds the InstanceID and ViewID_OVR initializers to the end of the initializers' sequence. -void InitializeViewIDAndInstanceID(TIntermTyped *viewIDSymbol, - TIntermTyped *instanceIDSymbol, - unsigned numberOfViews, - const TSymbolTable &symbolTable, - TIntermSequence *initializers) -{ - // Create an unsigned numberOfViews node. - TConstantUnion *numberOfViewsUnsignedConstant = new TConstantUnion(); - numberOfViewsUnsignedConstant->setUConst(numberOfViews); - TIntermConstantUnion *numberOfViewsUint = - new TIntermConstantUnion(numberOfViewsUnsignedConstant, TType(EbtUInt, EbpHigh, EvqConst)); - - // Create a uint(gl_InstanceID) node. - TIntermSequence *glInstanceIDSymbolCastArguments = new TIntermSequence(); - glInstanceIDSymbolCastArguments->push_back(CreateGLInstanceIDSymbol(symbolTable)); - TIntermAggregate *glInstanceIDAsUint = TIntermAggregate::CreateConstructor( - TType(EbtUInt, EbpHigh, EvqTemporary), glInstanceIDSymbolCastArguments); - - // Create a uint(gl_InstanceID) / numberOfViews node. - TIntermBinary *normalizedInstanceID = - new TIntermBinary(EOpDiv, glInstanceIDAsUint, numberOfViewsUint); - - // Create an int(uint(gl_InstanceID) / numberOfViews) node. - TIntermSequence *normalizedInstanceIDCastArguments = new TIntermSequence(); - normalizedInstanceIDCastArguments->push_back(normalizedInstanceID); - TIntermAggregate *normalizedInstanceIDAsInt = TIntermAggregate::CreateConstructor( - TType(EbtInt, EbpHigh, EvqTemporary), normalizedInstanceIDCastArguments); - - // Create an InstanceID = int(uint(gl_InstanceID) / numberOfViews) node. - TIntermBinary *instanceIDInitializer = - new TIntermBinary(EOpAssign, instanceIDSymbol->deepCopy(), normalizedInstanceIDAsInt); - initializers->push_back(instanceIDInitializer); - - // Create a uint(gl_InstanceID) % numberOfViews node. - TIntermBinary *normalizedViewID = - new TIntermBinary(EOpIMod, glInstanceIDAsUint->deepCopy(), numberOfViewsUint->deepCopy()); - - // Create a ViewID_OVR = uint(gl_InstanceID) % numberOfViews node. - TIntermBinary *viewIDInitializer = - new TIntermBinary(EOpAssign, viewIDSymbol->deepCopy(), normalizedViewID); - initializers->push_back(viewIDInitializer); -} - -// Replaces every occurrence of a symbol with the name specified in symbolName with newSymbolNode. -void ReplaceSymbol(TIntermBlock *root, const TString &symbolName, TIntermSymbol *newSymbolNode) -{ - ReplaceVariableTraverser traverser(symbolName, newSymbolNode); - root->traverse(&traverser); - traverser.updateTree(); -} - -void DeclareGlobalVariable(TIntermBlock *root, TIntermTyped *typedNode) -{ - TIntermSequence *globalSequence = root->getSequence(); - TIntermDeclaration *declaration = new TIntermDeclaration(); - declaration->appendDeclarator(typedNode->deepCopy()); - globalSequence->insert(globalSequence->begin(), declaration); -} - -// Adds a branch to write int(ViewID_OVR) to either gl_ViewportIndex or gl_Layer. The branch is -// added to the end of the initializers' sequence. -void SelectViewIndexInVertexShader(TIntermTyped *viewIDSymbol, - TIntermTyped *multiviewBaseViewLayerIndexSymbol, - TIntermSequence *initializers, - const TSymbolTable &symbolTable) -{ - // Create an int(ViewID_OVR) node. - TIntermSequence *viewIDSymbolCastArguments = new TIntermSequence(); - viewIDSymbolCastArguments->push_back(viewIDSymbol); - TIntermAggregate *viewIDAsInt = TIntermAggregate::CreateConstructor( - TType(EbtInt, EbpHigh, EvqTemporary), viewIDSymbolCastArguments); - - // Create a gl_ViewportIndex node. - TIntermSymbol *viewportIndexSymbol = - ReferenceBuiltInVariable("gl_ViewportIndex", symbolTable, 0); - - // Create a { gl_ViewportIndex = int(ViewID_OVR) } node. - TIntermBlock *viewportIndexInitializerInBlock = new TIntermBlock(); - viewportIndexInitializerInBlock->appendStatement( - new TIntermBinary(EOpAssign, viewportIndexSymbol, viewIDAsInt)); - - // Create a gl_Layer node. - TIntermSymbol *layerSymbol = ReferenceBuiltInVariable("gl_Layer", symbolTable, 0); - - // Create an int(ViewID_OVR) + multiviewBaseViewLayerIndex node - TIntermBinary *sumOfViewIDAndBaseViewIndex = - new TIntermBinary(EOpAdd, viewIDAsInt->deepCopy(), multiviewBaseViewLayerIndexSymbol); - - // Create a { gl_Layer = int(ViewID_OVR) + multiviewBaseViewLayerIndex } node. - TIntermBlock *layerInitializerInBlock = new TIntermBlock(); - layerInitializerInBlock->appendStatement( - new TIntermBinary(EOpAssign, layerSymbol, sumOfViewIDAndBaseViewIndex)); - - // Create a node to compare whether the base view index uniform is less than zero. - TIntermBinary *multiviewBaseViewLayerIndexZeroComparison = - new TIntermBinary(EOpLessThan, multiviewBaseViewLayerIndexSymbol->deepCopy(), - CreateZeroNode(TType(EbtInt, EbpHigh, EvqConst))); - - // Create an if-else statement to select the code path. - TIntermIfElse *multiviewBranch = - new TIntermIfElse(multiviewBaseViewLayerIndexZeroComparison, - viewportIndexInitializerInBlock, layerInitializerInBlock); - - initializers->push_back(multiviewBranch); -} - -} // namespace - -void DeclareAndInitBuiltinsForInstancedMultiview(TIntermBlock *root, - unsigned numberOfViews, - GLenum shaderType, - ShCompileOptions compileOptions, - ShShaderOutput shaderOutput, - TSymbolTable *symbolTable) -{ - ASSERT(shaderType == GL_VERTEX_SHADER || shaderType == GL_FRAGMENT_SHADER); - - TQualifier viewIDQualifier = (shaderType == GL_VERTEX_SHADER) ? EvqFlatOut : EvqFlatIn; - TIntermSymbol *viewIDSymbol = new TIntermSymbol(symbolTable->nextUniqueId(), "ViewID_OVR", - TType(EbtUInt, EbpHigh, viewIDQualifier)); - viewIDSymbol->setInternal(true); - - DeclareGlobalVariable(root, viewIDSymbol); - ReplaceSymbol(root, "gl_ViewID_OVR", viewIDSymbol); - if (shaderType == GL_VERTEX_SHADER) - { - // Replacing gl_InstanceID with InstanceID should happen before adding the initializers of - // InstanceID and ViewID. - TIntermSymbol *instanceIDSymbol = new TIntermSymbol( - symbolTable->nextUniqueId(), "InstanceID", TType(EbtInt, EbpHigh, EvqGlobal)); - instanceIDSymbol->setInternal(true); - DeclareGlobalVariable(root, instanceIDSymbol); - ReplaceSymbol(root, "gl_InstanceID", instanceIDSymbol); - - TIntermSequence *initializers = new TIntermSequence(); - InitializeViewIDAndInstanceID(viewIDSymbol, instanceIDSymbol, numberOfViews, *symbolTable, - initializers); - - // The AST transformation which adds the expression to select the viewport index should - // be done only for the GLSL and ESSL output. - const bool selectView = (compileOptions & SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER) != 0u; - // Assert that if the view is selected in the vertex shader, then the output is - // either GLSL or ESSL. - ASSERT(!selectView || IsOutputGLSL(shaderOutput) || IsOutputESSL(shaderOutput)); - if (selectView) - { - // Add a uniform to switch between side-by-side and layered rendering. - TIntermSymbol *multiviewBaseViewLayerIndexSymbol = - new TIntermSymbol(symbolTable->nextUniqueId(), "multiviewBaseViewLayerIndex", - TType(EbtInt, EbpHigh, EvqUniform)); - multiviewBaseViewLayerIndexSymbol->setInternal(true); - DeclareGlobalVariable(root, multiviewBaseViewLayerIndexSymbol); - - // Setting a value to gl_ViewportIndex or gl_Layer should happen after ViewID_OVR's - // initialization. - SelectViewIndexInVertexShader(viewIDSymbol->deepCopy(), - multiviewBaseViewLayerIndexSymbol->deepCopy(), - initializers, *symbolTable); - } - - // Insert initializers at the beginning of main(). - TIntermBlock *initializersBlock = new TIntermBlock(); - initializersBlock->getSequence()->swap(*initializers); - TIntermBlock *mainBody = FindMainBody(root); - mainBody->getSequence()->insert(mainBody->getSequence()->begin(), initializersBlock); - } -} - -} // namespace sh
\ No newline at end of file |