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glsl/cl: implement parsing for layout qualifiers 

For GL_ARB_fragment_coord_conventions support.
This commit is contained in:
Brian Paul 2010-02-13 13:50:26 -07:00
parent 3b53b7e8b0
commit 46f788c2e5
1 changed files with 74 additions and 4 deletions
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78
src/glsl/cl/sl_cl_parse.c
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@ -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);