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glsl: throw error when using invariant(all) in a fragment shader

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Note that some of the GLSL specifications explicitly state this as
compile error, some simply state that 'it is an error'.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
This commit is contained in:
Tapani Pälli 2014-11-04 14:20:15 +02:00
parent c914247dcb
commit 636db35c35
1 changed files with 12 additions and 1 deletions
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13
src/glsl/glsl_parser.yy
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@ -331,7 +331,18 @@ pragma_statement:
| PRAGMA_OPTIMIZE_OFF EOL
| PRAGMA_INVARIANT_ALL EOL
{
if (!state->is_version(120, 100)) {
/* Pragma invariant(all) cannot be used in a fragment shader.
*
* Page 27 of the GLSL 1.20 spec, Page 53 of the GLSL ES 3.00 spec:
*
* "It is an error to use this pragma in a fragment shader."
*/
if (state->is_version(120, 300) &&
state->stage == MESA_SHADER_FRAGMENT) {
_mesa_glsl_error(& @1, state,
"pragma `invariant(all)' cannot be used "
"in a fragment shader.");
} else if (!state->is_version(120, 100)) {
_mesa_glsl_warning(& @1, state,
"pragma `invariant(all)' not supported in %s "
"(GLSL ES 1.00 or GLSL 1.20 required)",