From fcae1a64ec0ef96bf90e473893849213ab9c14dd Mon Sep 17 00:00:00 2001 From: Nicolai Hähnle Date: Mon, 11 Sep 2017 16:40:37 +0200 Subject: glsl: do not set the 'smooth' qualifier by default on ES shaders MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It leads to surprising states with integer inputs and outputs on vertex processing stages (e.g. geometry stages). Instead, rely on the driver to choose smooth interpolation by default. We still allow varyings to match when one stage declares it as smooth and the other declares it without interpolation qualifiers. Reviewed-by: Marek Olšák Tested-by: Dieter Nützel --- src/compiler/glsl/ast_to_hir.cpp | 11 ----------- src/compiler/glsl/link_varyings.cpp | 17 ++++++++++++++++- src/mesa/main/shader_query.cpp | 8 +++++++- 3 files changed, 23 insertions(+), 13 deletions(-) diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp index c46454956d7..1999e68158c 100644 --- a/src/compiler/glsl/ast_to_hir.cpp +++ b/src/compiler/glsl/ast_to_hir.cpp @@ -3126,17 +3126,6 @@ interpret_interpolation_qualifier(const struct ast_type_qualifier *qual, interpolation = INTERP_MODE_NOPERSPECTIVE; else if (qual->flags.q.smooth) interpolation = INTERP_MODE_SMOOTH; - else if (state->es_shader && - ((mode == ir_var_shader_in && - state->stage != MESA_SHADER_VERTEX) || - (mode == ir_var_shader_out && - state->stage != MESA_SHADER_FRAGMENT))) - /* Section 4.3.9 (Interpolation) of the GLSL ES 3.00 spec says: - * - * "When no interpolation qualifier is present, smooth interpolation - * is used." - */ - interpolation = INTERP_MODE_SMOOTH; else interpolation = INTERP_MODE_NONE; diff --git a/src/compiler/glsl/link_varyings.cpp b/src/compiler/glsl/link_varyings.cpp index 656bf79ca9d..ed3bf416878 100644 --- a/src/compiler/glsl/link_varyings.cpp +++ b/src/compiler/glsl/link_varyings.cpp @@ -325,8 +325,23 @@ cross_validate_types_and_qualifiers(struct gl_shader_program *prog, * "It is a link-time error if, within the same stage, the interpolation * qualifiers of variables of the same name do not match. * + * Section 4.3.9 (Interpolation) of the GLSL ES 3.00 spec says: + * + * "When no interpolation qualifier is present, smooth interpolation + * is used." + * + * So we match variables where one is smooth and the other has no explicit + * qualifier. */ - if (input->data.interpolation != output->data.interpolation && + unsigned input_interpolation = input->data.interpolation; + unsigned output_interpolation = output->data.interpolation; + if (prog->IsES) { + if (input_interpolation == INTERP_MODE_NONE) + input_interpolation = INTERP_MODE_SMOOTH; + if (output_interpolation == INTERP_MODE_NONE) + output_interpolation = INTERP_MODE_SMOOTH; + } + if (input_interpolation != output_interpolation && prog->data->Version < 440) { linker_error(prog, "%s shader output `%s' specifies %s " diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp index 64e68b4a26d..6712bb45fb2 100644 --- a/src/mesa/main/shader_query.cpp +++ b/src/mesa/main/shader_query.cpp @@ -1634,7 +1634,13 @@ validate_io(struct gl_program *producer, struct gl_program *consumer) * Note that location mismatches are detected by the loops above that * find the producer variable that goes with the consumer variable. */ - if (producer_var->interpolation != consumer_var->interpolation) { + unsigned producer_interpolation = producer_var->interpolation; + unsigned consumer_interpolation = consumer_var->interpolation; + if (producer_interpolation == INTERP_MODE_NONE) + producer_interpolation = INTERP_MODE_SMOOTH; + if (consumer_interpolation == INTERP_MODE_NONE) + consumer_interpolation = INTERP_MODE_SMOOTH; + if (producer_interpolation != consumer_interpolation) { valid = false; goto out; } -- cgit v1.2.3