| // |
| // Copyright (c) 2002-2013 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. |
| // |
| |
| #include "compiler/InitializeGLPosition.h" |
| #include "compiler/debug.h" |
| |
| bool InitializeGLPosition::visitAggregate(Visit visit, TIntermAggregate* node) |
| { |
| bool visitChildren = !mCodeInserted; |
| switch (node->getOp()) |
| { |
| case EOpSequence: break; |
| case EOpFunction: |
| { |
| // Function definition. |
| ASSERT(visit == PreVisit); |
| if (node->getName() == "main(") |
| { |
| TIntermSequence &sequence = node->getSequence(); |
| ASSERT((sequence.size() == 1) || (sequence.size() == 2)); |
| TIntermAggregate *body = NULL; |
| if (sequence.size() == 1) |
| { |
| body = new TIntermAggregate(EOpSequence); |
| sequence.push_back(body); |
| } |
| else |
| { |
| body = sequence[1]->getAsAggregate(); |
| } |
| ASSERT(body); |
| insertCode(body->getSequence()); |
| mCodeInserted = true; |
| } |
| break; |
| } |
| default: visitChildren = false; break; |
| } |
| return visitChildren; |
| } |
| |
| void InitializeGLPosition::insertCode(TIntermSequence& sequence) |
| { |
| TIntermBinary *binary = new TIntermBinary(EOpAssign); |
| sequence.insert(sequence.begin(), binary); |
| |
| TIntermSymbol *left = new TIntermSymbol( |
| 0, "gl_Position", TType(EbtFloat, EbpUndefined, EvqPosition, 4)); |
| binary->setLeft(left); |
| |
| ConstantUnion *u = new ConstantUnion[4]; |
| for (int ii = 0; ii < 3; ++ii) |
| u[ii].setFConst(0.0f); |
| u[3].setFConst(1.0f); |
| TIntermConstantUnion *right = new TIntermConstantUnion( |
| u, TType(EbtFloat, EbpUndefined, EvqConst, 4)); |
| binary->setRight(right); |
| } |