diff options
| -rw-r--r-- | src/glsl/link_varyings.cpp | 6 | ||||
| -rw-r--r-- | src/glsl/linker.cpp | 82 |
2 files changed, 74 insertions, 14 deletions
diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp index c0b4b3e820c..ac2755f66a8 100644 --- a/src/glsl/link_varyings.cpp +++ b/src/glsl/link_varyings.cpp @@ -896,8 +896,10 @@ varying_matches::record(ir_variable *producer_var, ir_variable *consumer_var) { assert(producer_var != NULL || consumer_var != NULL); - if ((producer_var && !producer_var->data.is_unmatched_generic_inout) - || (consumer_var && !consumer_var->data.is_unmatched_generic_inout)) { + if ((producer_var && (!producer_var->data.is_unmatched_generic_inout || + producer_var->data.explicit_location)) || + (consumer_var && (!consumer_var->data.is_unmatched_generic_inout || + consumer_var->data.explicit_location))) { /* Either a location already exists for this variable (since it is part * of fixed functionality), or it has already been recorded as part of a * previous match. diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index 5ff433ccba9..d2df33d8920 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -631,20 +631,12 @@ link_invalidate_variable_locations(exec_list *ir) /* ir_variable::is_unmatched_generic_inout is used by the linker while * connecting outputs from one stage to inputs of the next stage. - * - * There are two implicit assumptions here. First, we assume that any - * built-in variable (i.e., non-generic in or out) will have - * explicit_location set. Second, we assume that any generic in or out - * will not have explicit_location set. - * - * This second assumption will only be valid until - * GL_ARB_separate_shader_objects is supported. When that extension is - * implemented, this function will need some modifications. */ - if (!var->data.explicit_location) { - var->data.is_unmatched_generic_inout = 1; - } else { + if (var->data.explicit_location && + var->data.location < VARYING_SLOT_VAR0) { var->data.is_unmatched_generic_inout = 0; + } else { + var->data.is_unmatched_generic_inout = 1; } } } @@ -2421,6 +2413,7 @@ assign_attribute_or_color_locations(gl_shader_program *prog, continue; if (var->data.explicit_location) { + var->data.is_unmatched_generic_inout = 0; if ((var->data.location >= (int)(max_index + generic_base)) || (var->data.location < 0)) { linker_error(prog, @@ -2690,6 +2683,61 @@ assign_attribute_or_color_locations(gl_shader_program *prog, return true; } +/** + * Match explicit locations of outputs to inputs and deactivate the + * unmatch flag if found so we don't optimise them away. + */ +void +match_explicit_outputs_to_inputs(struct gl_shader_program *prog, + gl_shader *producer, + gl_shader *consumer) +{ + glsl_symbol_table parameters; + ir_variable *explicit_locations[MAX_VARYING] = { NULL }; + + /* Find all shader outputs in the "producer" stage. + */ + foreach_in_list(ir_instruction, node, producer->ir) { + ir_variable *const var = node->as_variable(); + + if ((var == NULL) || (var->data.mode != ir_var_shader_out)) + continue; + + /* Mark output as matched if separate shader with no linked consumer */ + if (consumer == NULL) + var->data.is_unmatched_generic_inout = 0; + + if (var->data.explicit_location && + var->data.location >= VARYING_SLOT_VAR0) { + const unsigned idx = var->data.location - VARYING_SLOT_VAR0; + if (explicit_locations[idx] == NULL) + explicit_locations[idx] = var; + } + } + + /* Match inputs to outputs */ + foreach_in_list(ir_instruction, node, consumer->ir) { + ir_variable *const input = node->as_variable(); + + if ((input == NULL) || (input->data.mode != ir_var_shader_in)) + continue; + + /* Mark input as matched if separate shader with no linked producer */ + if (producer == NULL) + input->data.is_unmatched_generic_inout = 0; + + ir_variable *output = NULL; + if (input->data.explicit_location + && input->data.location >= VARYING_SLOT_VAR0) { + output = explicit_locations[input->data.location - VARYING_SLOT_VAR0]; + + if (output != NULL){ + input->data.is_unmatched_generic_inout = 0; + output->data.is_unmatched_generic_inout = 0; + } + } + } +} /** * Demote shader inputs and outputs that are not used in other stages @@ -4258,6 +4306,16 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog) } } + prev = first; + for (unsigned i = prev + 1; i <= MESA_SHADER_FRAGMENT; i++) { + if (prog->_LinkedShaders[i] == NULL) + continue; + + match_explicit_outputs_to_inputs(prog, prog->_LinkedShaders[prev], + prog->_LinkedShaders[i]); + prev = i; + } + if (!assign_attribute_or_color_locations(prog, &ctx->Const, MESA_SHADER_VERTEX)) { goto done; |