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glsl: Add default precision qualifiers to the symbol table

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The GLSL ES spec specifies default precision qualifiers for certain types,
so populate the symbol table with these.

Notice that the desktop GLSL spec also indicates defaults for some types
but this is not really useful since precision qualifiers are completely
ignored in desktop GLSL.

v2: simplify and add samplerExternalOES, specified by
    OES_EGL_image_external (Tapani)

v3: add atomic_uint (reported missing by Marta)

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
This commit is contained in:
Iago Toral Quiroga
2015-02-26 12:15:17 +01:00
committed by Tapani Pälli
parent d6a6167354
commit e3082fb273
1 changed files with 12 additions and 0 deletions
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src/glsl/glsl_parser.yy
+12
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@@ -313,6 +313,18 @@ translation_unit:
{
delete state->symbols;
state->symbols = new(ralloc_parent(state)) glsl_symbol_table;
if (state->es_shader) {
if (state->stage == MESA_SHADER_FRAGMENT) {
state->symbols->add_default_precision_qualifier("int", ast_precision_medium);
} else {
state->symbols->add_default_precision_qualifier("float", ast_precision_high);
state->symbols->add_default_precision_qualifier("int", ast_precision_high);
}
state->symbols->add_default_precision_qualifier("sampler2D", ast_precision_low);
state->symbols->add_default_precision_qualifier("samplerExternalOES", ast_precision_low);
state->symbols->add_default_precision_qualifier("samplerCube", ast_precision_low);
state->symbols->add_default_precision_qualifier("atomic_uint", ast_precision_high);
}
_mesa_glsl_initialize_types(state);
}
;