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Use GLSLANG_ANGLE to strip features to what ANGLE requires

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This change strips a few features similar to GLSLANG_WEB but doesn't
remove every detail like the latter.  It also hardcodes profile/version
to core/450.

In particular, TBuiltIns::initialize is specialized to remove most of
what is not supported or won't be supported by ANGLE.  The result of
this function is parsed with TParseContext::parseShaderStrings which is
a performance bottleneck.

This change shaves about 300KB off of ANGLE's binary size and reduces
the cost of SetupBuiltinSymbolTable to nearly a sixth.

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
This commit is contained in:
Shahbaz Youssefi
2020-07-03 15:42:53 -04:00
parent f5ed7a69d5
commit 8c49d15fbf
17 changed files with 215 additions and 103 deletions
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6
gtests/TestFixture.h
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@@ -253,7 +253,7 @@ public:
glslang::TProgram program;
program.addShader(&shader);
success &= program.link(controls);
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
if (success)
program.mapIO();
#endif
@@ -315,7 +315,7 @@ public:
program.addShader(&shader);
success &= program.link(controls);
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
if (success)
program.mapIO();
#endif
@@ -360,7 +360,7 @@ public:
glslang::TProgram program;
program.addShader(&shader);
success &= program.link(controls);
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
if (success)
program.mapIO();
#endif