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Built-in symbol tables now lazily evaluated, and driven by per version, per profile input. Got all ES 100 and ES 300 built-in symbols correct.

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This includes
 - doing prescan of shader to know version/profile before parsing it
 - putting precision qualifiers on built-in ES symbols
 - getting most built-in state correct for core/compatibility/missing profile
 - adding gl_VertexID and gl_InstanceID, among other ES 300 built-in symbols
 - adding the ES 300 gl_Max/Min constants
 - accepting shaders that contain nothing but whitespace without generating an error


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20627 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-02-17 06:01:50 +00:00
parent fb5f7eadfa
commit bd0747d6f0
16 changed files with 843 additions and 491 deletions
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123
glslang/MachineIndependent/ParseHelper.cpp
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@ -38,95 +38,43 @@
#include "Include/InitializeParseContext.h"
#include "osinclude.h"
#include <stdarg.h>
TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, int v, EProfile p, EShLanguage L, TInfoSink& is) :
intermediate(interm), symbolTable(symt), infoSink(is), language(L), treeRoot(0),
recoveredFromError(false), numErrors(0), lexAfterType(false), loopNestingLevel(0),
switchNestingLevel(0), inTypeParen(false),
version(v), profile(p), futureCompatibility(false),
contextPragma(true, false)
{
for (int type = 0; type < EbtNumTypes; ++type)
defaultPrecision[type] = EpqNone;
if (profile == EEsProfile) {
switch (language) {
case EShLangVertex:
defaultPrecision[EbtInt] = EpqHigh;
defaultPrecision[EbtFloat] = EpqHigh;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
break;
case EShLangFragment:
defaultPrecision[EbtInt] = EpqMedium;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
// TODO: give error when using float in frag shader without default precision
break;
default:
error(1, "INTERNAL ERROR", "unexpected language", "");
}
}
}
///////////////////////////////////////////////////////////////////////
//
// Sub- vector and matrix fields
//
////////////////////////////////////////////////////////////////////////
TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, EShLanguage L, TInfoSink& is, int defaultVersion) :
intermediate(interm), symbolTable(symt), infoSink(is), language(L), treeRoot(0),
recoveredFromError(false), numErrors(0), lexAfterType(false), loopNestingLevel(0),
switchNestingLevel(0), inTypeParen(false),
futureCompatibility(false),
contextPragma(true, false)
{
// Default precisions for version 110, to be overridden for
// other versions/profiles/stage combinations
for (int type = 0; type < EbtNumTypes; ++type)
defaultPrecision[type] = EpqNone;
setVersion(defaultVersion);
setProfile(ENoProfile);
}
void TParseContext::setVersion(int newVersion)
{
version = newVersion;
if (version == 100 || version == 300) {
if (language == EShLangVertex) {
defaultPrecision[EbtInt] = EpqHigh;
defaultPrecision[EbtFloat] = EpqHigh;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
}
if (language == EShLangFragment) {
defaultPrecision[EbtInt] = EpqMedium;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
// TODO: give error when using float in frag shader without default precision
}
} else {
for (int type = 0; type < EbtNumTypes; ++type)
defaultPrecision[type] = EpqNone;
}
}
// Important assumption: SetVersion() is called before SetProfile(), and is always called
// if there is a version, sending in a ENoProfile if there is no profile given.
void TParseContext::setProfile(EProfile newProfile)
{
const int FirstProfileVersion = 150;
if (newProfile == ENoProfile) {
if (version == 300) {
error(1, "version 300 requires specifying the 'es' profile", "#version", "");
profile = EEsProfile;
} else if (version == 100)
profile = EEsProfile;
else if (version >= FirstProfileVersion)
profile = ECoreProfile;
else
profile = ENoProfile;
} else {
// a profile was provided...
if (version < 150) {
error(1, "versions before 150 do not allow a profile token", "#version", "");
if (version == 100)
profile = EEsProfile;
else
profile = ENoProfile;
} else if (version == 300) {
if (newProfile != EEsProfile)
error(1, "only version 300 supports the es profile", "#version", "");
profile = EEsProfile;
} else {
if (newProfile == EEsProfile) {
error(1, "only version 300 supports the es profile", "#version", "");
if (version >= FirstProfileVersion)
profile = ECoreProfile;
else
profile = ENoProfile;
} else {
// typical desktop case... e.g., "#version 410 core"
profile = newProfile;
}
}
}
}
//
// Look at a '.' field selector string and change it into offsets
// for a vector.
@ -380,6 +328,8 @@ bool TParseContext::lValueErrorCheck(int line, const char* op, TIntermTyped* nod
case EvqAttribute: message = "can't modify an attribute"; break;
case EvqUniform: message = "can't modify a uniform"; break;
case EvqVaryingIn: message = "can't modify a varying"; break;
case EvqInstanceId: message = "can't modify gl_InstanceID"; break;
case EvqVertexId: message = "can't modify gl_VertexID"; break;
case EvqFace: message = "can't modify gl_FrontFace"; break;
case EvqFragCoord: message = "can't modify gl_FragCoord"; break;
case EvqPointCoord: message = "can't modify gl_PointCoord"; break;
@ -767,9 +717,10 @@ bool TParseContext::insertBuiltInArrayAtGlobalLevel()
{
TString *name = NewPoolTString("gl_TexCoord");
TSymbol* symbol = symbolTable.find(*name);
if (!symbol) {
error(0, "INTERNAL ERROR finding symbol", name->c_str(), "");
return true;
if (! symbol) {
// assume it was not added due to version/profile
return false;
}
TVariable* variable = symbol->getAsVariable();