Updated to mesalib 7.9

1 files changed, 102 insertions, 0 deletions

diff --git a/mesalib/src/glsl/hir_field_selection.cpp b/mesalib/src/glsl/hir_field_selection.cpp
new file mode 100644
index 000000000..3c33127b5
--- /dev/null
+++ b/mesalib/src/glsl/hir_field_selection.cpp
@@ -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);
+}