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| 1901 | serge | 1 | /* |
| 2 | * Copyright © 2010 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 21 | * DEALINGS IN THE SOFTWARE. |
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| 22 | */ |
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| 23 | |||
| 24 | #include "ir.h" |
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| 25 | #include "program/symbol_table.h" |
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| 26 | #include "glsl_parser_extras.h" |
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| 27 | #include "ast.h" |
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| 28 | #include "glsl_types.h" |
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| 29 | |||
| 30 | ir_rvalue * |
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| 31 | _mesa_ast_field_selection_to_hir(const ast_expression *expr, |
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| 32 | exec_list *instructions, |
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| 33 | struct _mesa_glsl_parse_state *state) |
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| 34 | { |
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| 35 | void *ctx = state; |
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| 36 | ir_rvalue *result = NULL; |
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| 37 | ir_rvalue *op; |
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| 38 | |||
| 39 | op = expr->subexpressions[0]->hir(instructions, state); |
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| 40 | |||
| 41 | /* There are two kinds of field selection. There is the selection of a |
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| 42 | * specific field from a structure, and there is the selection of a |
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| 43 | * swizzle / mask from a vector. Which is which is determined entirely |
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| 44 | * by the base type of the thing to which the field selection operator is |
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| 45 | * being applied. |
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| 46 | */ |
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| 47 | YYLTYPE loc = expr->get_location(); |
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| 48 | if (op->type->is_error()) { |
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| 49 | /* silently propagate the error */ |
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| 50 | } else if (op->type->is_vector()) { |
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| 51 | ir_swizzle *swiz = ir_swizzle::create(op, |
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| 52 | expr->primary_expression.identifier, |
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| 53 | op->type->vector_elements); |
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| 54 | if (swiz != NULL) { |
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| 55 | result = swiz; |
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| 56 | } else { |
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| 57 | /* FINISHME: Logging of error messages should be moved into |
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| 58 | * FINISHME: ir_swizzle::create. This allows the generation of more |
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| 59 | * FINISHME: specific error messages. |
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| 60 | */ |
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| 61 | _mesa_glsl_error(& loc, state, "Invalid swizzle / mask `%s'", |
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| 62 | expr->primary_expression.identifier); |
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| 63 | } |
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| 64 | } else if (op->type->base_type == GLSL_TYPE_STRUCT) { |
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| 65 | result = new(ctx) ir_dereference_record(op, |
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| 66 | expr->primary_expression.identifier); |
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| 67 | |||
| 68 | if (result->type->is_error()) { |
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| 69 | _mesa_glsl_error(& loc, state, "Cannot access field `%s' of " |
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| 70 | "structure", |
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| 71 | expr->primary_expression.identifier); |
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| 72 | } |
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| 73 | } else if (expr->subexpressions[1] != NULL) { |
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| 74 | /* Handle "method calls" in GLSL 1.20 - namely, array.length() */ |
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| 75 | if (state->language_version < 120) |
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| 76 | _mesa_glsl_error(&loc, state, "Methods not supported in GLSL 1.10."); |
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| 77 | |||
| 78 | ast_expression *call = expr->subexpressions[1]; |
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| 79 | assert(call->oper == ast_function_call); |
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| 80 | |||
| 81 | const char *method; |
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| 82 | method = call->subexpressions[0]->primary_expression.identifier; |
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| 83 | |||
| 84 | if (op->type->is_array() && strcmp(method, "length") == 0) { |
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| 85 | if (!call->expressions.is_empty()) |
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| 86 | _mesa_glsl_error(&loc, state, "length method takes no arguments."); |
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| 87 | |||
| 88 | if (op->type->array_size() == 0) |
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| 89 | _mesa_glsl_error(&loc, state, "length called on unsized array."); |
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| 90 | |||
| 91 | result = new(ctx) ir_constant(op->type->array_size()); |
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| 92 | } else { |
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| 93 | _mesa_glsl_error(&loc, state, "Unknown method: `%s'.", method); |
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| 94 | } |
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| 95 | } else { |
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| 96 | _mesa_glsl_error(& loc, state, "Cannot access field `%s' of " |
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| 97 | "non-structure / non-vector.", |
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| 98 | expr->primary_expression.identifier); |
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| 99 | } |
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| 100 | |||
| 101 | return result ? result : ir_call::get_error_instruction(ctx); |
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| 102 | } |