skia2/resources/sksl/shared/ScopedSymbol.sksl
John Stiles 5420cbcf65 Match GLSL scoping rules more closely in SkSL.
GLSL treats builtin types and user-defined types differently; `int` and
`float` are keywords and cannot be used to name variables. However, it's
fine for a user type like `struct xyz` to be hidden by a variable
`int xyz` or even `xyz xyz` (i.e., a variable of type `struct xyz` named
`xyz`).

We now honor that distinction and include tests for it. This will fix
several ES2 conformance tests (local_struct_variable_hides_struct_type,
local_int_variable_hides_struct_type, etc.).

Change-Id: I7a45c70707087f9f355ce5b06b032fed16683f3e
Bug: skia:12527
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/458721
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2021-10-12 21:53:28 +00:00

46 lines
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uniform half4 colorGreen, colorRed;
int glob;
bool block_variable_hides_local_variable() {
bool var = true;
{
bool var = false;
}
return var;
}
bool block_variable_hides_global_variable() {
{
int glob = 1;
}
return glob == 2;
}
struct S {
int i;
};
bool local_variable_hides_struct() {
bool S = true;
return S;
}
bool local_struct_variable_hides_struct_type() {
S S = S(1);
return S.i == 1;
}
bool local_variable_hides_global_variable() {
int glob = 1;
return glob == 1;
}
half4 main(float2 coords) {
glob = 2;
return (block_variable_hides_local_variable() &&
block_variable_hides_global_variable() &&
local_variable_hides_struct() &&
local_struct_variable_hides_struct_type() &&
local_variable_hides_global_variable()) ? colorGreen : colorRed;
}