From 4d14b190bbaf4d1c56f5c8d2fae3fcddb44cc4c2 Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Wed, 25 Sep 2013 16:16:00 -0700 Subject: glsl/sso: Add parser and AST-to-HIR support for separate shader object layouts GL_ARB_separate_shader_objects adds the ability to specify location layouts for interstage inputs and outputs. In addition, this extension makes 'in' and 'out' generally available for shader inputs and outputs. This mimics the behavior of GL_ARB_explicit_attrib_location. Signed-off-by: Ian Romanick Reviewed-by: Jordan Justen --- src/glsl/ast_to_hir.cpp | 63 +++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 50 insertions(+), 13 deletions(-) (limited to 'src/glsl/ast_to_hir.cpp') diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp index f754652dc9c..f06baeb9f31 100644 --- a/src/glsl/ast_to_hir.cpp +++ b/src/glsl/ast_to_hir.cpp @@ -2123,11 +2123,16 @@ validate_explicit_location(const struct ast_type_qualifier *qual, { bool fail = false; - /* In the vertex shader only shader inputs can be given explicit - * locations. + /* Between GL_ARB_explicit_attrib_location an + * GL_ARB_separate_shader_objects, the inputs and outputs of any shader + * stage can be assigned explicit locations. The checking here associates + * the correct extension with the correct stage's input / output: * - * In the fragment shader only shader outputs can be given explicit - * locations. + * input output + * ----- ------ + * vertex explicit_loc sso + * geometry sso sso + * fragment sso explicit_loc */ switch (state->stage) { case MESA_SHADER_VERTEX: @@ -2138,16 +2143,35 @@ validate_explicit_location(const struct ast_type_qualifier *qual, break; } + if (var->data.mode == ir_var_shader_out) { + if (!state->check_separate_shader_objects_allowed(loc, var)) + return; + + break; + } + fail = true; break; case MESA_SHADER_GEOMETRY: - _mesa_glsl_error(loc, state, - "geometry shader variables cannot be given " - "explicit locations"); - return; + if (var->data.mode == ir_var_shader_in || var->data.mode == ir_var_shader_out) { + if (!state->check_separate_shader_objects_allowed(loc, var)) + return; + + break; + } + + fail = true; + break; case MESA_SHADER_FRAGMENT: + if (var->data.mode == ir_var_shader_in) { + if (!state->check_separate_shader_objects_allowed(loc, var)) + return; + + break; + } + if (var->data.mode == ir_var_shader_out) { if (!state->check_explicit_attrib_location_allowed(loc, var)) return; @@ -2181,9 +2205,23 @@ validate_explicit_location(const struct ast_type_qualifier *qual, * ensures that negative values stay negative. */ if (qual->location >= 0) { - var->data.location = (state->stage == MESA_SHADER_VERTEX) - ? (qual->location + VERT_ATTRIB_GENERIC0) - : (qual->location + FRAG_RESULT_DATA0); + switch (state->stage) { + case MESA_SHADER_VERTEX: + var->data.location = (var->data.mode == ir_var_shader_in) + ? (qual->location + VERT_ATTRIB_GENERIC0) + : (qual->location + VARYING_SLOT_VAR0); + break; + + case MESA_SHADER_GEOMETRY: + var->data.location = qual->location + VARYING_SLOT_VAR0; + break; + + case MESA_SHADER_FRAGMENT: + var->data.location = (var->data.mode == ir_var_shader_out) + ? (qual->location + FRAG_RESULT_DATA0) + : (qual->location + VARYING_SLOT_VAR0); + break; + } } else { var->data.location = qual->location; } @@ -2207,8 +2245,6 @@ validate_explicit_location(const struct ast_type_qualifier *qual, } } } - - return; } static void @@ -3147,6 +3183,7 @@ ast_declarator_list::hir(exec_list *instructions, */ if (!state->is_version(130, 300) && !state->has_explicit_attrib_location() + && !state->has_separate_shader_objects() && !state->ARB_fragment_coord_conventions_enable) { if (this->type->qualifier.flags.q.out) { _mesa_glsl_error(& loc, state, -- cgit v1.2.3