summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorBrian Paul <[email protected]>2010-02-13 13:50:26 -0700
committerBrian Paul <[email protected]>2010-02-13 13:50:45 -0700
commit46f788c2e51630915e5a8cef074daeff8f7fc8cc (patch)
tree2a6f72936f449331cc71d41db354167f43779de9
parent3b53b7e8b06d4caa4bebcc0d58ec0a0233ac77ba (diff)
glsl/cl: implement parsing for layout qualifiers
For GL_ARB_fragment_coord_conventions support.
-rw-r--r--src/glsl/cl/sl_cl_parse.c78
1 files changed, 74 insertions, 4 deletions
diff --git a/src/glsl/cl/sl_cl_parse.c b/src/glsl/cl/sl_cl_parse.c
index e256ab82138..883bc1ffd31 100644
--- a/src/glsl/cl/sl_cl_parse.c
+++ b/src/glsl/cl/sl_cl_parse.c
@@ -120,6 +120,11 @@
#define TYPE_CENTER 95
#define TYPE_CENTROID 96
+/* layout qualifiers */
+#define LAYOUT_QUALIFIER_NONE 0
+#define LAYOUT_QUALIFIER_UPPER_LEFT 1
+#define LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER 2
+
/* type specifier */
#define TYPE_SPECIFIER_VOID 0
#define TYPE_SPECIFIER_BOOL 1
@@ -297,6 +302,10 @@ struct parse_dict {
int out;
int inout;
+ int layout;
+ int origin_upper_left;
+ int pixel_center_integer;
+
int _struct;
int __constructor;
@@ -462,6 +471,10 @@ _fetch_token(struct parse_context *ctx,
}
+/**
+ * Try to parse/match a particular token.
+ * \return 0 for success, -1 for error.
+ */
static int
_parse_token(struct parse_context *ctx,
enum sl_pp_token token,
@@ -477,6 +490,10 @@ _parse_token(struct parse_context *ctx,
}
+/**
+ * Try to parse an identifer.
+ * \return 0 for success, -1 for error
+ */
static int
_parse_id(struct parse_context *ctx,
int id,
@@ -707,8 +724,52 @@ _parse_centroid_qualifier(struct parse_context *ctx,
static int
-_parse_type_qualifier(struct parse_context *ctx,
- struct parse_state *ps)
+_parse_layout_qualifier(struct parse_context *ctx,
+ struct parse_state *ps)
+{
+ if (_parse_id(ctx, ctx->dict.layout, ps) == 0) {
+ /* start of a parenthesised list of layout qualifiers */
+
+ if (_parse_token(ctx, SL_PP_LPAREN, ps)) {
+ _error(ctx, "expected `('");
+ return -1;
+ }
+
+ /* parse comma-separated ID list */
+ while (1) {
+ if (_parse_id(ctx, ctx->dict.origin_upper_left, ps) == 0) {
+ _emit(ctx, &ps->out, LAYOUT_QUALIFIER_UPPER_LEFT);
+ }
+ else if (_parse_id(ctx, ctx->dict.pixel_center_integer, ps) == 0) {
+ _emit(ctx, &ps->out, LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER);
+ }
+ else {
+ _error(ctx, "expected a layout qualifier");
+ return -1;
+ }
+
+ if (_parse_token(ctx, SL_PP_RPAREN, ps) == 0) {
+ /* all done */
+ break;
+ }
+ else if (_parse_token(ctx, SL_PP_COMMA, ps) == 0) {
+ /* another layout qualifier is coming */
+ }
+ else {
+ _error(ctx, "expected `,' or `)'");
+ return -1;
+ }
+ }
+
+ }
+
+ return -1;
+}
+
+
+static int
+_parse_storage_qualifier(struct parse_context *ctx,
+ struct parse_state *ps)
{
struct parse_state p = *ps;
const struct sl_pp_token_info *input = _fetch_token(ctx, p.in);
@@ -1006,13 +1067,18 @@ _parse_fully_specified_type(struct parse_context *ctx,
{
struct parse_state p = *ps;
+ if (_parse_layout_qualifier(ctx, &p)) {
+ _emit(ctx, &p.out, LAYOUT_QUALIFIER_NONE);
+ }
+
if (_parse_invariant_qualifier(ctx, &p)) {
_emit(ctx, &p.out, TYPE_VARIANT);
}
+
if (_parse_centroid_qualifier(ctx, &p)) {
_emit(ctx, &p.out, TYPE_CENTER);
}
- if (_parse_type_qualifier(ctx, &p)) {
+ if (_parse_storage_qualifier(ctx, &p)) {
_emit(ctx, &p.out, TYPE_QUALIFIER_NONE);
}
if (_parse_precision(ctx, &p)) {
@@ -1698,7 +1764,7 @@ _parse_parameter_declaration(struct parse_context *ctx,
(void) e;
- if (_parse_type_qualifier(ctx, &p)) {
+ if (_parse_storage_qualifier(ctx, &p)) {
_emit(ctx, &p.out, TYPE_QUALIFIER_NONE);
}
_parse_parameter_qualifier(ctx, &p);
@@ -2772,6 +2838,10 @@ sl_cl_compile(struct sl_pp_context *context,
ADD_NAME(ctx, out);
ADD_NAME(ctx, inout);
+ ADD_NAME(ctx, layout);
+ ADD_NAME(ctx, origin_upper_left);
+ ADD_NAME(ctx, pixel_center_integer);
+
ADD_NAME_STR(ctx, _struct, "struct");
ADD_NAME(ctx, __constructor);