0,0 → 1,102 |
/* |
* 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_call::get_error_instruction(ctx); |
} |