| /* |
| * Copyright © 2010 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include "ir.h" |
| #include "program/symbol_table.h" |
| #include "glsl_parser_extras.h" |
| #include "ast.h" |
| #include "glsl_types.h" |
| |
| ir_rvalue * |
| _mesa_ast_field_selection_to_hir(const ast_expression *expr, |
| exec_list *instructions, |
| struct _mesa_glsl_parse_state *state) |
| { |
| void *ctx = state; |
| ir_rvalue *result = NULL; |
| ir_rvalue *op; |
| |
| op = expr->subexpressions[0]->hir(instructions, state); |
| |
| /* There are two kinds of field selection. There is the selection of a |
| * specific field from a structure, and there is the selection of a |
| * swizzle / mask from a vector. Which is which is determined entirely |
| * by the base type of the thing to which the field selection operator is |
| * being applied. |
| */ |
| YYLTYPE loc = expr->get_location(); |
| if (op->type->is_error()) { |
| /* silently propagate the error */ |
| } else if (op->type->is_vector()) { |
| ir_swizzle *swiz = ir_swizzle::create(op, |
| expr->primary_expression.identifier, |
| op->type->vector_elements); |
| if (swiz != NULL) { |
| result = swiz; |
| } else { |
| /* FINISHME: Logging of error messages should be moved into |
| * FINISHME: ir_swizzle::create. This allows the generation of more |
| * FINISHME: specific error messages. |
| */ |
| _mesa_glsl_error(& loc, state, "Invalid swizzle / mask `%s'", |
| expr->primary_expression.identifier); |
| } |
| } else if (op->type->base_type == GLSL_TYPE_STRUCT) { |
| result = new(ctx) ir_dereference_record(op, |
| expr->primary_expression.identifier); |
| |
| if (result->type->is_error()) { |
| _mesa_glsl_error(& loc, state, "Cannot access field `%s' of " |
| "structure", |
| expr->primary_expression.identifier); |
| } |
| } else if (expr->subexpressions[1] != NULL) { |
| /* Handle "method calls" in GLSL 1.20 - namely, array.length() */ |
| if (state->language_version < 120) |
| _mesa_glsl_error(&loc, state, "Methods not supported in GLSL 1.10."); |
| |
| ast_expression *call = expr->subexpressions[1]; |
| assert(call->oper == ast_function_call); |
| |
| const char *method; |
| method = call->subexpressions[0]->primary_expression.identifier; |
| |
| if (op->type->is_array() && strcmp(method, "length") == 0) { |
| if (!call->expressions.is_empty()) |
| _mesa_glsl_error(&loc, state, "length method takes no arguments."); |
| |
| if (op->type->array_size() == 0) |
| _mesa_glsl_error(&loc, state, "length called on unsized array."); |
| |
| result = new(ctx) ir_constant(op->type->array_size()); |
| } else { |
| _mesa_glsl_error(&loc, state, "Unknown method: `%s'.", method); |
| } |
| } else { |
| _mesa_glsl_error(& loc, state, "Cannot access field `%s' of " |
| "non-structure / non-vector.", |
| expr->primary_expression.identifier); |
| } |
| |
| return result ? result : ir_rvalue::error_value(ctx); |
| } |