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web: Fix accidental additon of refract() prototypes and update README.

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This commit is contained in:
John Kessenich 2019-08-21 03:38:02 -06:00
parent deec1933e9
commit 369ffa9543
3 changed files with 23 additions and 11 deletions
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11
README.md
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@ -155,17 +155,24 @@ changes are quite infrequent. For windows you can get binaries from
The command to rebuild is:
```bash
m4 -P MachineIndependent/glslang.m4 > MachineIndependent/glslang.y
bison --defines=MachineIndependent/glslang_tab.cpp.h
-t MachineIndependent/glslang.y
-o MachineIndependent/glslang_tab.cpp
```
The above command is also available in the bash script at
`glslang/updateGrammar`.
The above commands are also available in the bash script in `updateGrammar`,
when executed from the glslang subdirectory of the glslang repository.
With no arguments it builds the full grammar, and with a "web" argument,
the web grammar subset (see more about the web subset in the next section).
### WASM for the the Web
Use the steps in [Build Steps](#build-steps), which following notes/exceptions:
* For building the web subset of core glslang:
+ `m4` also needs a `-DGLSLANG_WEB` argument, or simply execute `updateGrammar web` from the glslang subdirectory
+ turn off the CMAKE options for `BUILD_TESTING`, `ENABLE_OPT`, and `INSTALL_GTEST`,
while turning on `ENABLE_GLSLANG_WEB`
* `emsdk` needs to be present in your executable search path, *PATH* for
Bash-like enivironments
+ Instructions located

6
Test/baseResults/spv.specConstant.vert.out
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@ -11,7 +11,7 @@ spv.specConstant.vert
Source GLSL 400
Name 4 "main"
Name 9 "arraySize"
Name 14 "foo(vf4[s2772];"
Name 14 "foo(vf4[s2769];"
Name 13 "p"
Name 17 "builtin_spec_constant("
Name 20 "color"
@ -102,10 +102,10 @@ spv.specConstant.vert
Store 20(color) 46
48: 10 Load 22(ucol)
Store 47(param) 48
49: 2 FunctionCall 14(foo(vf4[s2772];) 47(param)
49: 2 FunctionCall 14(foo(vf4[s2769];) 47(param)
Return
FunctionEnd
14(foo(vf4[s2772];): 2 Function None 12
14(foo(vf4[s2769];): 2 Function None 12
13(p): 11(ptr) FunctionParameter
15: Label
54: 24(ptr) AccessChain 53(dupUcol) 23

17
glslang/MachineIndependent/Initialize.cpp
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@ -107,7 +107,8 @@ const ArgType TypeIU = static_cast<ArgType>(TypeI | TypeU);
// output, or other unusual situations.
enum ArgClass {
ClassRegular = 0, // nothing special, just all vector widths with matching return type; traditional arithmetic
ClassLS = 1 << 1, // the last argument is also held fixed as a (type-matched) scalar while the others cycle
ClassLS = 1 << 0, // the last argument is also held fixed as a (type-matched) scalar while the others cycle
ClassXLS = 1 << 1, // the last argument is exclusively a (type-matched) scalar while the others cycle
ClassLS2 = 1 << 2, // the last two arguments are held fixed as a (type-matched) scalar while the others cycle
ClassFS = 1 << 3, // the first argument is held fixed as a (type-matched) scalar while the others cycle
ClassFS2 = 1 << 4, // the first two arguments are held fixed as a (type-matched) scalar while the others cycle
@ -217,7 +218,7 @@ const BuiltInFunction BaseFunctions[] = {
{ EOpNormalize, "normalize", 1, TypeF, ClassRegular, nullptr },
{ EOpFaceForward, "faceforward", 3, TypeF, ClassRegular, nullptr },
{ EOpReflect, "reflect", 2, TypeF, ClassRegular, nullptr },
{ EOpRefract, "refract", 3, TypeF, ClassLS, nullptr },
{ EOpRefract, "refract", 3, TypeF, ClassXLS, nullptr },
{ EOpLength, "length", 1, TypeF, ClassRS, nullptr },
{ EOpDistance, "distance", 2, TypeF, ClassRS, nullptr },
{ EOpDot, "dot", 2, TypeF, ClassRS, nullptr },
@ -286,9 +287,12 @@ void AddTabledBuiltin(TString& decls, const BuiltInFunction& function)
// loop across these two:
// 0: the varying arg set, and
// 1: the fixed scalar args
const ArgClass ClassFixed = (ArgClass)(ClassLS | ClassLS2 | ClassFS | ClassFS2);
const ArgClass ClassFixed = (ArgClass)(ClassLS | ClassXLS | ClassLS2 | ClassFS | ClassFS2);
for (int fixed = 0; fixed < ((function.classes & ClassFixed) > 0 ? 2 : 1); ++fixed) {
if (fixed == 0 && (function.classes & ClassXLS))
continue;
// walk the type strings in TypeString[]
for (int type = 0; type < TypeStringCount; ++type) {
// skip types not selected: go from type to row number to type bit
@ -303,8 +307,8 @@ void AddTabledBuiltin(TString& decls, const BuiltInFunction& function)
if ((function.classes & ClassV3) && (type & TypeStringColumnMask) != 2)
continue;
// skip replication of all scalars between the varying arg set and the fixed args
if (fixed == 1 && type == (type & TypeStringScalarMask))
// skip replication of all arg scalars between the varying arg set and the fixed args
if (fixed == 1 && type == (type & TypeStringScalarMask) && (function.classes & ClassXLS) == 0)
continue;
// skip scalars when we are told to
@ -336,7 +340,8 @@ void AddTabledBuiltin(TString& decls, const BuiltInFunction& function)
}
if ((function.classes & ClassLB) && arg == function.numArguments - 1)
decls.append(TypeString[type & TypeStringColumnMask]);
else if (fixed && ((arg == function.numArguments - 1 && (function.classes & (ClassLS | ClassLS2))) ||
else if (fixed && ((arg == function.numArguments - 1 && (function.classes & (ClassLS | ClassXLS |
ClassLS2))) ||
(arg == function.numArguments - 2 && (function.classes & ClassLS2)) ||
(arg == 0 && (function.classes & (ClassFS | ClassFS2))) ||
(arg == 1 && (function.classes & ClassFS2))))