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Disallow initializers on uniform variables

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Bug: skia:11335
Change-Id: I88c952cbfe2d2c5920e17675da1674928f37b982
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/371480
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
This commit is contained in:
Brian Osman 2021-02-17 16:24:04 -05:00 committed by Skia Commit-Bot
parent 5e603c3a46
commit 2fe67f9680
5 changed files with 15 additions and 2 deletions
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1
gn/sksl_tests.gni
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@ -175,6 +175,7 @@ sksl_error_tests = [
"/sksl/errors/UndeclaredFunction.sksl",
"/sksl/errors/UndefinedFunction.sksl",
"/sksl/errors/UndefinedSymbol.sksl",
"/sksl/errors/UniformVarWithInitializerExpression.sksl",
"/sksl/errors/UnknownDivideByZero.sksl",
"/sksl/errors/Unreachable.sksl",
"/sksl/errors/UnsupportedGLSLIdentifiers.sksl",

4
resources/sksl/errors/SwitchTypes.sksl
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@ -1,5 +1,5 @@
uniform float uf = 1;
uniform int ui = 1;
uniform float uf;
uniform int ui;
const float cf = 1;
const int ci = 1;
int i = 1;

3
resources/sksl/errors/UniformVarWithInitializerExpression.sksl Normal file
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@ -0,0 +1,3 @@
uniform float x = 1;
float y;
uniform float z = y = 1;

4
src/sksl/SkSLIRGenerator.cpp
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@ -472,6 +472,10 @@ std::unique_ptr<Statement> IRGenerator::convertVarDeclaration(int offset,
this->errorReporter().error(value->fOffset,
"'in' variables cannot use initializer expressions");
}
if (modifiers.fFlags & Modifiers::kUniform_Flag) {
this->errorReporter().error(value->fOffset,
"'uniform' variables cannot use initializer expressions");
}
value = this->coerce(std::move(value), *type);
if (!value) {
return {};

5
tests/sksl/errors/UniformVarWithInitializerExpression.glsl Normal file
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@ -0,0 +1,5 @@
### Compilation failed:
error: 1: 'uniform' variables cannot use initializer expressions
error: 3: 'uniform' variables cannot use initializer expressions
2 errors