65ac360823
This is the guts of the GLSL parser and AST support for shader subroutines. The code creates a subroutine type in the parser, and uses that there to validate the identifiers. The parser also distinguishes between subroutine types/function prototypes /uniforms and subroutine defintions for functions. Then in the AST conversion it recreates the types, and stores the subroutine definition info or subroutine info into the ir_function along with a side lookup table in the parser state. It also converts subroutine calls into the enhanced ir_call. v2: move to handling method calls in function handling not in field selection. v3: merge Chris's previous parser patches in here, to make it clearer what's changed in one place. v3.1: add more documentation, drop unused include v3.2: drop is_subroutine_def Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> Signed-off-by: Dave Airlie <airlied@redhat.com>
83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "ir.h"
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#include "glsl_parser_extras.h"
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#include "ast.h"
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#include "glsl_types.h"
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ir_rvalue *
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_mesa_ast_field_selection_to_hir(const ast_expression *expr,
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exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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void *ctx = state;
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ir_rvalue *result = NULL;
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ir_rvalue *op;
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op = expr->subexpressions[0]->hir(instructions, state);
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/* There are two kinds of field selection. There is the selection of a
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* specific field from a structure, and there is the selection of a
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* swizzle / mask from a vector. Which is which is determined entirely
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* by the base type of the thing to which the field selection operator is
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* being applied.
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*/
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YYLTYPE loc = expr->get_location();
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if (op->type->is_error()) {
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/* silently propagate the error */
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} else if (op->type->base_type == GLSL_TYPE_STRUCT
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|| op->type->base_type == GLSL_TYPE_INTERFACE) {
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result = new(ctx) ir_dereference_record(op,
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expr->primary_expression.identifier);
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if (result->type->is_error()) {
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_mesa_glsl_error(& loc, state, "cannot access field `%s' of "
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"structure",
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expr->primary_expression.identifier);
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}
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} else if (op->type->is_vector() ||
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(state->ARB_shading_language_420pack_enable &&
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op->type->is_scalar())) {
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ir_swizzle *swiz = ir_swizzle::create(op,
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expr->primary_expression.identifier,
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op->type->vector_elements);
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if (swiz != NULL) {
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result = swiz;
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} else {
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/* FINISHME: Logging of error messages should be moved into
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* FINISHME: ir_swizzle::create. This allows the generation of more
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* FINISHME: specific error messages.
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*/
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_mesa_glsl_error(& loc, state, "invalid swizzle / mask `%s'",
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expr->primary_expression.identifier);
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}
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} else {
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_mesa_glsl_error(& loc, state, "cannot access field `%s' of "
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"non-structure / non-vector",
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expr->primary_expression.identifier);
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}
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return result ? result : ir_rvalue::error_value(ctx);
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}
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