diff options
| -rw-r--r-- | src/glsl/ast_to_hir.cpp | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp index 192130a99b8..52059e4bfb3 100644 --- a/src/glsl/ast_to_hir.cpp +++ b/src/glsl/ast_to_hir.cpp @@ -3132,32 +3132,45 @@ ast_declarator_list::hir(exec_list *instructions, } - /* Precision qualifiers only apply to floating point and integer types. + /* Precision qualifiers apply to floating point, integer and sampler + * types. * - * From section 4.5.2 of the GLSL 1.30 spec: + * Section 4.5.2 (Precision Qualifiers) of the GLSL 1.30 spec says: * "Any floating point or any integer declaration can have the type * preceded by one of these precision qualifiers [...] Literal * constants do not have precision qualifiers. Neither do Boolean * variables. * - * In GLSL ES, sampler types are also allowed. + * Section 4.5 (Precision and Precision Qualifiers) of the GLSL 1.30 + * spec also says: * - * From page 87 of the GLSL ES spec: - * "RESOLUTION: Allow sampler types to take a precision qualifier." + * "Precision qualifiers are added for code portability with OpenGL + * ES, not for functionality. They have the same syntax as in OpenGL + * ES." + * + * Section 8 (Built-In Functions) of the GLSL ES 1.00 spec says: + * + * "uniform lowp sampler2D sampler; + * highp vec2 coord; + * ... + * lowp vec4 col = texture2D (sampler, coord); + * // texture2D returns lowp" + * + * From this, we infer that GLSL 1.30 (and later) should allow precision + * qualifiers on sampler types just like float and integer types. */ if (this->type->qualifier.precision != ast_precision_none && !var->type->is_float() && !var->type->is_integer() && !var->type->is_record() - && !(var->type->is_sampler() && state->es_shader) + && !var->type->is_sampler() && !(var->type->is_array() && (var->type->fields.array->is_float() || var->type->fields.array->is_integer()))) { _mesa_glsl_error(&loc, state, "precision qualifiers apply only to floating point" - "%s types", state->es_shader ? ", integer, and sampler" - : "and integer"); + ", integer and sampler types"); } /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec: |