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gfx/angle/src/compiler/MapLongVariableNames.cpp@141e0f1194b1 (annotated)

gfx/angle/src/compiler/MapLongVariableNames.cpp

Wed, 31 Dec 2014 07:16:47 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 07:16:47 +0100

branch

TOR_BUG_9701

changeset 3

141e0f1194b1

permissions

-rw-r--r--

Revert simplistic fix pending revisit of Mozilla integration attempt.

michael@0	1	//
michael@0	2	// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
michael@0	3	// Use of this source code is governed by a BSD-style license that can be
michael@0	4	// found in the LICENSE file.
michael@0	5	//
michael@0	6
michael@0	7	#include "compiler/MapLongVariableNames.h"
michael@0	8
michael@0	9	#include "third_party/murmurhash/MurmurHash3.h"
michael@0	10
michael@0	11	namespace {
michael@0	12
michael@0	13	TString mapLongName(size_t id, const TString& name, bool isGlobal)
michael@0	14	{
michael@0	15	ASSERT(name.size() > MAX_SHORTENED_IDENTIFIER_SIZE);
michael@0	16	TStringStream stream;
michael@0	17
michael@0	18	uint64_t hash[2] = {0, 0};
michael@0	19	MurmurHash3_x64_128(name.data(), name.length(), 0, hash);
michael@0	20
michael@0	21	// We want to avoid producing a string with a double underscore,
michael@0	22	// which would be an illegal GLSL identifier. We can assume that the
michael@0	23	// original identifier doesn't have a double underscore, otherwise
michael@0	24	// it's illegal anyway.
michael@0	25	stream << (name[0] == '_' ? "webgl" : "webgl_")
michael@0	26	<< name.substr(0, 9)
michael@0	27	<< (name[8] == '_' ? "" : "_")
michael@0	28	<< std::hex
michael@0	29	<< hash[0];
michael@0	30	ASSERT(stream.str().length() <= MAX_SHORTENED_IDENTIFIER_SIZE);
michael@0	31	ASSERT(stream.str().length() >= MAX_SHORTENED_IDENTIFIER_SIZE - 2);
michael@0	32	return stream.str();
michael@0	33	}
michael@0	34
michael@0	35	LongNameMap* gLongNameMapInstance = NULL;
michael@0	36
michael@0	37	} // anonymous namespace
michael@0	38
michael@0	39	LongNameMap::LongNameMap()
michael@0	40	: refCount(0)
michael@0	41	{
michael@0	42	}
michael@0	43
michael@0	44	LongNameMap::~LongNameMap()
michael@0	45	{
michael@0	46	}
michael@0	47
michael@0	48	// static
michael@0	49	LongNameMap* LongNameMap::GetInstance()
michael@0	50	{
michael@0	51	if (gLongNameMapInstance == NULL)
michael@0	52	gLongNameMapInstance = new LongNameMap;
michael@0	53	gLongNameMapInstance->refCount++;
michael@0	54	return gLongNameMapInstance;
michael@0	55	}
michael@0	56
michael@0	57	void LongNameMap::Release()
michael@0	58	{
michael@0	59	ASSERT(gLongNameMapInstance == this);
michael@0	60	ASSERT(refCount > 0);
michael@0	61	refCount--;
michael@0	62	if (refCount == 0) {
michael@0	63	delete gLongNameMapInstance;
michael@0	64	gLongNameMapInstance = NULL;
michael@0	65	}
michael@0	66	}
michael@0	67
michael@0	68	const char* LongNameMap::Find(const char* originalName) const
michael@0	69	{
michael@0	70	std::map<std::string, std::string>::const_iterator it = mLongNameMap.find(
michael@0	71	originalName);
michael@0	72	if (it != mLongNameMap.end())
michael@0	73	return (*it).second.c_str();
michael@0	74	return NULL;
michael@0	75	}
michael@0	76
michael@0	77	void LongNameMap::Insert(const char* originalName, const char* mappedName)
michael@0	78	{
michael@0	79	mLongNameMap.insert(std::map<std::string, std::string>::value_type(
michael@0	80	originalName, mappedName));
michael@0	81	}
michael@0	82
michael@0	83	size_t LongNameMap::Size() const
michael@0	84	{
michael@0	85	return mLongNameMap.size();
michael@0	86	}
michael@0	87
michael@0	88	MapLongVariableNames::MapLongVariableNames(LongNameMap* globalMap)
michael@0	89	{
michael@0	90	ASSERT(globalMap);
michael@0	91	mGlobalMap = globalMap;
michael@0	92	}
michael@0	93
michael@0	94	void MapLongVariableNames::visitSymbol(TIntermSymbol* symbol)
michael@0	95	{
michael@0	96	ASSERT(symbol != NULL);
michael@0	97	if (symbol->getSymbol().size() > MAX_SHORTENED_IDENTIFIER_SIZE) {
michael@0	98	switch (symbol->getQualifier()) {
michael@0	99	case EvqVaryingIn:
michael@0	100	case EvqVaryingOut:
michael@0	101	case EvqInvariantVaryingIn:
michael@0	102	case EvqInvariantVaryingOut:
michael@0	103	case EvqUniform:
michael@0	104	symbol->setSymbol(
michael@0	105	mapGlobalLongName(symbol->getSymbol()));
michael@0	106	break;
michael@0	107	default:
michael@0	108	symbol->setSymbol(
michael@0	109	mapLongName(symbol->getId(), symbol->getSymbol(), false));
michael@0	110	break;
michael@0	111	};
michael@0	112	}
michael@0	113	}
michael@0	114
michael@0	115	bool MapLongVariableNames::visitLoop(Visit, TIntermLoop* node)
michael@0	116	{
michael@0	117	if (node->getInit())
michael@0	118	node->getInit()->traverse(this);
michael@0	119	return true;
michael@0	120	}
michael@0	121
michael@0	122	TString MapLongVariableNames::mapGlobalLongName(const TString& name)
michael@0	123	{
michael@0	124	ASSERT(mGlobalMap);
michael@0	125	const char* mappedName = mGlobalMap->Find(name.c_str());
michael@0	126	if (mappedName != NULL)
michael@0	127	return mappedName;
michael@0	128	size_t id = mGlobalMap->Size();
michael@0	129	TString rt = mapLongName(id, name, true);
michael@0	130	mGlobalMap->Insert(name.c_str(), rt.c_str());
michael@0	131	return rt;
michael@0	132	}