[Mesa-dev] [PATCH 5/5] glsl: allow multiple layout qualifiers for a single declaration
Timothy Arceri
timothy.arceri at collabora.com
Mon Jan 18 00:29:41 PST 2016
>From the ARB_shading_language_420pack spec:
"More than one layout qualifier may appear in a single
declaration. If the same layout-qualifier-name occurs in
multiple layout qualifiers for the same declaration, the
last one overrides the former ones."
The parser was already failing correctly when the extension is
not available but testing for duplicates within a single layout
qualifier was still causing this to fail when available as both
cases share the same function for merging.
Here we add a parameter to differentiate between the two uses
and apply it to the duplicate test.
Cc: Matt Turner <mattst88 at gmail.com>
---
src/glsl/ast.h | 3 ++-
src/glsl/ast_type.cpp | 12 +++++++++---
src/glsl/glsl_parser.yy | 32 +++++++++++++++++---------------
3 files changed, 28 insertions(+), 19 deletions(-)
diff --git a/src/glsl/ast.h b/src/glsl/ast.h
index 4651669..03df6c0 100644
--- a/src/glsl/ast.h
+++ b/src/glsl/ast.h
@@ -699,7 +699,8 @@ struct ast_type_qualifier {
bool merge_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
- const ast_type_qualifier &q);
+ const ast_type_qualifier &q,
+ bool is_single_layout_merge);
bool merge_out_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
diff --git a/src/glsl/ast_type.cpp b/src/glsl/ast_type.cpp
index 32cb0a0..cf494d9 100644
--- a/src/glsl/ast_type.cpp
+++ b/src/glsl/ast_type.cpp
@@ -114,10 +114,16 @@ ast_type_qualifier::interpolation_string() const
return NULL;
}
+/**
+ * This function merges both duplicate identifies within a single layout and
+ * multiple layout qualifiers on a single variable declaration. The
+ * is_single_layout_merge param is used differentiate between the two.
+ */
bool
ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
- const ast_type_qualifier &q)
+ const ast_type_qualifier &q,
+ bool is_single_layout_merge)
{
ast_type_qualifier ubo_mat_mask;
ubo_mat_mask.flags.i = 0;
@@ -157,7 +163,7 @@ ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
allowed_duplicates_mask.flags.i |=
stream_layout_mask.flags.i;
- if (!state->has_enhanced_layouts() &&
+ if (is_single_layout_merge && !state->has_enhanced_layouts() &&
(this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
_mesa_glsl_error(loc, state,
"duplicate layout qualifiers used");
@@ -294,7 +300,7 @@ ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
ast_node* &node, bool create_node)
{
void *mem_ctx = state;
- const bool r = this->merge_qualifier(loc, state, q);
+ const bool r = this->merge_qualifier(loc, state, q, false);
if (state->stage == MESA_SHADER_GEOMETRY) {
if (q.flags.q.prim_type) {
diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index 6099aeb..1019875 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -957,7 +957,7 @@ parameter_qualifier:
"or precise");
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| precision_qualifier parameter_qualifier
{
@@ -974,7 +974,7 @@ parameter_qualifier:
| memory_qualifier parameter_qualifier
{
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
parameter_direction_qualifier:
@@ -1153,7 +1153,7 @@ layout_qualifier_id_list:
| layout_qualifier_id_list ',' layout_qualifier_id
{
$$ = $1;
- if (!$$.merge_qualifier(& @3, state, $3)) {
+ if (!$$.merge_qualifier(& @3, state, $3, true)) {
YYERROR;
}
}
@@ -1762,7 +1762,7 @@ type_qualifier:
}
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| layout_qualifier type_qualifier
{
@@ -1779,12 +1779,12 @@ type_qualifier:
_mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| subroutine_qualifier type_qualifier
{
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| auxiliary_storage_qualifier type_qualifier
{
@@ -1800,7 +1800,7 @@ type_qualifier:
"just before storage qualifiers");
}
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| storage_qualifier type_qualifier
{
@@ -1820,7 +1820,7 @@ type_qualifier:
}
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
| precision_qualifier type_qualifier
{
@@ -1837,7 +1837,7 @@ type_qualifier:
| memory_qualifier type_qualifier
{
$$ = $1;
- $$.merge_qualifier(&@1, state, $2);
+ $$.merge_qualifier(&@1, state, $2, false);
}
;
@@ -2589,7 +2589,7 @@ interface_block:
YYERROR;
}
- if (!block->layout.merge_qualifier(& @1, state, $1)) {
+ if (!block->layout.merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
@@ -2606,7 +2606,7 @@ interface_block:
"memory qualifiers can only be used in the "
"declaration of shader storage blocks");
}
- if (!block->layout.merge_qualifier(& @1, state, $1)) {
+ if (!block->layout.merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
$$ = block;
@@ -2750,14 +2750,15 @@ layout_uniform_defaults:
YYERROR;
} else {
if (!state->default_uniform_qualifier->
- merge_qualifier(& @1, state, $1)) {
+ merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
}
}
| layout_qualifier UNIFORM ';'
{
- if (!state->default_uniform_qualifier->merge_qualifier(& @1, state, $1)) {
+ if (!state->default_uniform_qualifier->
+ merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
$$ = NULL;
@@ -2773,14 +2774,15 @@ layout_buffer_defaults:
YYERROR;
} else {
if (!state->default_shader_storage_qualifier->
- merge_qualifier(& @1, state, $1)) {
+ merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
}
}
| layout_qualifier BUFFER ';'
{
- if (!state->default_shader_storage_qualifier->merge_qualifier(& @1, state, $1)) {
+ if (!state->default_shader_storage_qualifier->
+ merge_qualifier(& @1, state, $1, false)) {
YYERROR;
}
--
2.4.3
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