fontconfig libX11 mesalib pixman xserver xkeyboard-config git update 4 Mar 2013

xserver          commit 8f4640bdb9d3988148e09a08d2c7e3bab1d538d6
xkeyboard-config commit fa2f330df22511c3846cb1cb0760551c6e244a81
libX11           commit c23d61d1b84dca3740bf4786978c7908d0065fb9
pixman           commit 5feda20fc39407879993ed4a6d861ef7f78d9432
fontconfig       commit 612ee2a5c91b8929b2cc5abce4af84d8d7e66bd0
mesa             commit e29124717eae4f8d329bb6a9707b802c0ff4bdd9

23 files changed, 224 insertions, 86 deletions

diff --git a/mesalib/src/glsl/builtin_types.h b/mesalib/src/glsl/builtin_types.h
index c78c2d270..acd2d76d5 100644
--- a/mesalib/src/glsl/builtin_types.h
+++ b/mesalib/src/glsl/builtin_types.h
@@ -347,3 +347,22 @@ const glsl_type glsl_type::builtin_ARB_texture_cube_map_array_types[] = {
 	     GLSL_SAMPLER_DIM_CUBE, 0, 1, GLSL_TYPE_UINT, "usamplerCubeArray"),
 };
 /*@}*/
+
+/** \name Sampler types added by GL_ARB_texture_multisample
+ */
+/*@{*/
+const glsl_type glsl_type::builtin_ARB_texture_multisample_types[] = {
+   glsl_type(GL_SAMPLER_2D_MULTISAMPLE,
+            GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_FLOAT, "sampler2DMS"),
+   glsl_type(GL_INT_SAMPLER_2D_MULTISAMPLE,
+            GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_INT, "isampler2DMS"),
+   glsl_type(GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE,
+            GLSL_SAMPLER_DIM_MS, 0, 0, GLSL_TYPE_UINT, "usampler2DMS"),
+   glsl_type(GL_SAMPLER_2D_MULTISAMPLE_ARRAY,
+            GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_FLOAT, "sampler2DMSArray"),
+   glsl_type(GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
+            GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_INT, "isampler2DMSArray"),
+   glsl_type(GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
+            GLSL_SAMPLER_DIM_MS, 0, 1, GLSL_TYPE_UINT, "usampler2DMSArray"),
+};
+/*@}*/
diff --git a/mesalib/src/glsl/builtin_variables.cpp b/mesalib/src/glsl/builtin_variables.cpp
index ccee7746e..53c4c51cd 100644
--- a/mesalib/src/glsl/builtin_variables.cpp
+++ b/mesalib/src/glsl/builtin_variables.cpp
@@ -849,6 +849,7 @@ initialize_vs_variables(exec_list *instructions,
          generate_130_vs_variables(instructions, state, true);
          break;
       case 140:
+      case 150:
          generate_130_vs_variables(instructions, state, false);
          break;
       default:
@@ -1140,6 +1141,7 @@ initialize_fs_variables(exec_list *instructions,
          generate_130_fs_variables(instructions, state);
          break;
       case 140:
+      case 150:
          generate_140_fs_variables(instructions, state);
          break;
       default:
diff --git a/mesalib/src/glsl/glcpp/glcpp-parse.y b/mesalib/src/glsl/glcpp/glcpp-parse.y
index e927c7cb7..d6afe8814 100644
--- a/mesalib/src/glsl/glcpp/glcpp-parse.y
+++ b/mesalib/src/glsl/glcpp/glcpp-parse.y
@@ -1230,6 +1230,9 @@ glcpp_parser_create (const struct gl_extensions *extensions, int api)
 
 	      if (extensions->ARB_shading_language_packing)
 	         add_builtin_define(parser, "GL_ARB_shading_language_packing", 1);
+
+	      if (extensions->ARB_texture_multisample)
+	         add_builtin_define(parser, "GL_ARB_texture_multisample", 1);
 	   }
 	}
 
diff --git a/mesalib/src/glsl/glsl_lexer.ll b/mesalib/src/glsl/glsl_lexer.ll
index ddc9f8073..008ef303d 100644
--- a/mesalib/src/glsl/glsl_lexer.ll
+++ b/mesalib/src/glsl/glsl_lexer.ll
@@ -315,6 +315,15 @@ usamplerCube		KEYWORD(130, 300, 130, 300, USAMPLERCUBE);
 usampler1DArray		KEYWORD(130, 300, 130, 0, USAMPLER1DARRAY);
 usampler2DArray		KEYWORD(130, 300, 130, 300, USAMPLER2DARRAY);
 
+   /* additional keywords in ARB_texture_multisample, included in GLSL 1.50 */
+   /* these are reserved but not defined in GLSL 3.00 */
+sampler2DMS        KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, SAMPLER2DMS);
+isampler2DMS       KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, ISAMPLER2DMS);
+usampler2DMS       KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, USAMPLER2DMS);
+sampler2DMSArray   KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, SAMPLER2DMSARRAY);
+isampler2DMSArray  KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, ISAMPLER2DMSARRAY);
+usampler2DMSArray  KEYWORD_WITH_ALT(150, 300, 150, 0, yyextra->ARB_texture_multisample_enable, USAMPLER2DMSARRAY);
+
 samplerCubeArray	{
 			  if (yyextra->ARB_texture_cube_map_array_enable)
 			     return SAMPLERCUBEARRAY;
@@ -531,12 +540,6 @@ atomic_uint	KEYWORD(0, 300, 0, 0, ATOMIC_UINT);
 patch		KEYWORD(0, 300, 0, 0, PATCH);
 sample		KEYWORD(0, 300, 0, 0, SAMPLE);
 subroutine	KEYWORD(0, 300, 0, 0, SUBROUTINE);
-sampler2DMS	KEYWORD(0, 300, 0, 0, SAMPLER2DMS);
-isampler2DMS	KEYWORD(0, 300, 0, 0, ISAMPLER2DMS);
-usampler2DMS	KEYWORD(0, 300, 0, 0, USAMPLER2DMS);
-sampler2DMSArray KEYWORD(0, 300, 0, 0, SAMPLER2DMSARRAY);
-isampler2DMSArray KEYWORD(0, 300, 0, 0, ISAMPLER2DMSARRAY);
-usampler2DMSArray KEYWORD(0, 300, 0, 0, USAMPLER2DMSARRAY);
 
 
 [_a-zA-Z][_a-zA-Z0-9]*	{
diff --git a/mesalib/src/glsl/glsl_parser.yy b/mesalib/src/glsl/glsl_parser.yy
index 154ce2d09..f52ed9b0a 100644
--- a/mesalib/src/glsl/glsl_parser.yy
+++ b/mesalib/src/glsl/glsl_parser.yy
@@ -109,6 +109,8 @@ static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
 %token USAMPLER2DARRAY USAMPLERCUBEARRAY
 %token SAMPLER2DRECT ISAMPLER2DRECT USAMPLER2DRECT SAMPLER2DRECTSHADOW
 %token SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
+%token SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
+%token SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
 %token SAMPLEREXTERNALOES
 %token STRUCT VOID_TOK WHILE
 %token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
@@ -140,8 +142,7 @@ static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
 %token SAMPLER3DRECT
 %token SIZEOF CAST NAMESPACE USING
 %token COHERENT RESTRICT READONLY WRITEONLY RESOURCE ATOMIC_UINT PATCH SAMPLE
-%token SUBROUTINE SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS SAMPLER2DMSARRAY
-%token ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
+%token SUBROUTINE
 
 %token ERROR_TOK
 
@@ -1462,6 +1463,12 @@ basic_type_specifier_nonarray:
 	| USAMPLER2DARRAY	{ $$ = "usampler2DArray"; }
 	| USAMPLERBUFFER	{ $$ = "usamplerBuffer"; }
 	| USAMPLERCUBEARRAY	{ $$ = "usamplerCubeArray"; }
+	| SAMPLER2DMS		{ $$ = "sampler2DMS"; }
+	| ISAMPLER2DMS		{ $$ = "isampler2DMS"; }
+	| USAMPLER2DMS		{ $$ = "usampler2DMS"; }
+	| SAMPLER2DMSARRAY	{ $$ = "sampler2DMSArray"; }
+	| ISAMPLER2DMSARRAY	{ $$ = "isampler2DMSArray"; }
+	| USAMPLER2DMSARRAY	{ $$ = "usampler2DMSArray"; }
 	;
 
 precision_qualifier:
diff --git a/mesalib/src/glsl/glsl_parser_extras.cpp b/mesalib/src/glsl/glsl_parser_extras.cpp
index df1714850..9d7de3381 100644
--- a/mesalib/src/glsl/glsl_parser_extras.cpp
+++ b/mesalib/src/glsl/glsl_parser_extras.cpp
@@ -467,6 +467,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(OES_standard_derivatives,       false, false, true,  false,  true,     OES_standard_derivatives),
    EXT(ARB_texture_cube_map_array,     true,  false, true,  true,  false,     ARB_texture_cube_map_array),
    EXT(ARB_shading_language_packing,   true,  false, true,  true,  false,     ARB_shading_language_packing),
+   EXT(ARB_texture_multisample,        true,  false, true,  true,  false,     ARB_texture_multisample),
 };
 
 #undef EXT
diff --git a/mesalib/src/glsl/glsl_parser_extras.h b/mesalib/src/glsl/glsl_parser_extras.h
index 3ebc27e1a..1765cdf16 100644
--- a/mesalib/src/glsl/glsl_parser_extras.h
+++ b/mesalib/src/glsl/glsl_parser_extras.h
@@ -280,6 +280,8 @@ struct _mesa_glsl_parse_state {
    bool ARB_texture_cube_map_array_warn;
    bool ARB_shading_language_packing_enable;
    bool ARB_shading_language_packing_warn;
+   bool ARB_texture_multisample_enable;
+   bool ARB_texture_multisample_warn;
    /*@}*/
 
    /** Extensions supported by the OpenGL implementation. */
diff --git a/mesalib/src/glsl/glsl_types.cpp b/mesalib/src/glsl/glsl_types.cpp
index 82aeb84ed..a783dcc3b 100644
--- a/mesalib/src/glsl/glsl_types.cpp
+++ b/mesalib/src/glsl/glsl_types.cpp
@@ -198,6 +198,8 @@ glsl_type::sampler_index() const
       return TEXTURE_BUFFER_INDEX;
    case GLSL_SAMPLER_DIM_EXTERNAL:
       return TEXTURE_EXTERNAL_INDEX;
+   case GLSL_SAMPLER_DIM_MS:
+      return (t->sampler_array) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX : TEXTURE_2D_MULTISAMPLE_INDEX;
    default:
       assert(!"Should not get here.");
       return TEXTURE_BUFFER_INDEX;
@@ -345,6 +347,16 @@ glsl_type::generate_ARB_texture_cube_map_array_types(glsl_symbol_table *symtab,
 }
 
 void
+glsl_type::generate_ARB_texture_multisample_types(glsl_symbol_table *symtab,
+                                                  bool warn)
+{
+   bool skip_1d = false;
+   add_types_to_symbol_table(symtab, builtin_ARB_texture_multisample_types,
+                             Elements(builtin_ARB_texture_multisample_types),
+                             warn, skip_1d);
+}
+
+void
 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
 {
    if (state->es_shader) {
@@ -373,6 +385,7 @@ _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
          glsl_type::generate_130_types(state->symbols, true, skip_1d);
          break;
       case 140:
+      case 150:
          glsl_type::generate_140_types(state->symbols);
          break;
       default:
@@ -412,6 +425,11 @@ _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state)
       glsl_type::generate_ARB_texture_cube_map_array_types(state->symbols,
 				       state->ARB_texture_cube_map_array_warn);
    }
+
+   if (state->ARB_texture_multisample_enable) {
+      glsl_type::generate_ARB_texture_multisample_types(state->symbols,
+         state->ARB_texture_multisample_warn);
+   }
 }
 
 
diff --git a/mesalib/src/glsl/glsl_types.h b/mesalib/src/glsl/glsl_types.h
index 8cfd8dd02..79304269d 100644
--- a/mesalib/src/glsl/glsl_types.h
+++ b/mesalib/src/glsl/glsl_types.h
@@ -67,7 +67,8 @@ enum glsl_sampler_dim {
    GLSL_SAMPLER_DIM_CUBE,
    GLSL_SAMPLER_DIM_RECT,
    GLSL_SAMPLER_DIM_BUF,
-   GLSL_SAMPLER_DIM_EXTERNAL
+   GLSL_SAMPLER_DIM_EXTERNAL,
+   GLSL_SAMPLER_DIM_MS
 };
 
 enum glsl_interface_packing {
@@ -561,6 +562,7 @@ private:
    static const glsl_type builtin_EXT_texture_buffer_object_types[];
    static const glsl_type builtin_OES_EGL_image_external_types[];
    static const glsl_type builtin_ARB_texture_cube_map_array_types[];
+   static const glsl_type builtin_ARB_texture_multisample_types[];
    /*@}*/
 
    /**
@@ -586,6 +588,7 @@ private:
    static void generate_OES_texture_3D_types(glsl_symbol_table *, bool);
    static void generate_OES_EGL_image_external_types(glsl_symbol_table *, bool);
    static void generate_ARB_texture_cube_map_array_types(glsl_symbol_table *, bool);
+   static void generate_ARB_texture_multisample_types(glsl_symbol_table *, bool);
    /*@}*/
 
    /**
diff --git a/mesalib/src/glsl/ir.cpp b/mesalib/src/glsl/ir.cpp
index 954995db3..2eb3af695 100644
--- a/mesalib/src/glsl/ir.cpp
+++ b/mesalib/src/glsl/ir.cpp
@@ -195,34 +195,6 @@ ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
    this->set_lhs(lhs);
 }
 
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
-			     ir_rvalue *op0)
-{
-   assert(get_num_operands(ir_expression_operation(op)) == 1);
-   this->ir_type = ir_type_expression;
-   this->type = type;
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = NULL;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-}
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
-			     ir_rvalue *op0, ir_rvalue *op1)
-{
-   assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))
-	  || (get_num_operands(ir_expression_operation(op)) == 2));
-   this->ir_type = ir_type_expression;
-   this->type = type;
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = op1;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-}
-
 ir_expression::ir_expression(int op, const struct glsl_type *type,
 			     ir_rvalue *op0, ir_rvalue *op1,
 			     ir_rvalue *op2, ir_rvalue *op3)
@@ -234,6 +206,12 @@ ir_expression::ir_expression(int op, const struct glsl_type *type,
    this->operands[1] = op1;
    this->operands[2] = op2;
    this->operands[3] = op3;
+#ifndef NDEBUG
+   int num_operands = get_num_operands(this->operation);
+   for (int i = num_operands; i < 4; i++) {
+      assert(this->operands[i] == NULL);
+   }
+#endif
 }
 
 ir_expression::ir_expression(int op, ir_rvalue *op0)
@@ -438,6 +416,9 @@ ir_expression::get_num_operands(ir_expression_operation op)
    if (op <= ir_last_binop)
       return 2;
 
+   if (op <= ir_last_triop)
+      return 3;
+
    if (op == ir_quadop_vector)
       return 4;
 
@@ -524,6 +505,7 @@ static const char *const operator_strs[] = {
    "pow",
    "packHalf2x16_split",
    "ubo_load",
+   "lrp",
    "vector",
 };
 
@@ -1325,7 +1307,7 @@ ir_dereference::is_lvalue() const
 }
 
 
-static const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
+static const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs" };
 
 const char *ir_texture::opcode_string()
 {
diff --git a/mesalib/src/glsl/ir.h b/mesalib/src/glsl/ir.h
index 1e09988e5..393b48673 100644
--- a/mesalib/src/glsl/ir.h
+++ b/mesalib/src/glsl/ir.h
@@ -1118,6 +1118,13 @@ enum ir_expression_operation {
     */
    ir_last_binop = ir_binop_ubo_load,
 
+   ir_triop_lrp,
+
+   /**
+    * A sentinel marking the last of the ternary operations.
+    */
+   ir_last_triop = ir_triop_lrp,
+
    ir_quadop_vector,
 
    /**
@@ -1128,25 +1135,20 @@ enum ir_expression_operation {
 
 class ir_expression : public ir_rvalue {
 public:
+   ir_expression(int op, const struct glsl_type *type,
+                 ir_rvalue *op0, ir_rvalue *op1 = NULL,
+                 ir_rvalue *op2 = NULL, ir_rvalue *op3 = NULL);
+
    /**
     * Constructor for unary operation expressions
     */
-   ir_expression(int op, const struct glsl_type *type, ir_rvalue *);
    ir_expression(int op, ir_rvalue *);
 
    /**
     * Constructor for binary operation expressions
     */
-   ir_expression(int op, const struct glsl_type *type,
-		 ir_rvalue *, ir_rvalue *);
    ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1);
 
-   /**
-    * Constructor for quad operator expressions
-    */
-   ir_expression(int op, const struct glsl_type *type,
-		 ir_rvalue *, ir_rvalue *, ir_rvalue *, ir_rvalue *);
-
    virtual ir_expression *as_expression()
    {
       return this;
@@ -1422,6 +1424,7 @@ enum ir_texture_opcode {
    ir_txl,		/**< Texture look-up with explicit LOD */
    ir_txd,		/**< Texture look-up with partial derivatvies */
    ir_txf,		/**< Texel fetch with explicit LOD */
+   ir_txf_ms,           /**< Multisample texture fetch */
    ir_txs		/**< Texture size */
 };
 
@@ -1443,6 +1446,8 @@ enum ir_texture_opcode {
  * (txl <type> <sampler> <coordinate> 0 1 ( ) <lod>)
  * (txd <type> <sampler> <coordinate> 0 1 ( ) (dPdx dPdy))
  * (txf <type> <sampler> <coordinate> 0       <lod>)
+ * (txf_ms
+ *      <type> <sampler> <coordinate>         <sample_index>)
  * (txs <type> <sampler> <lod>)
  */
 class ir_texture : public ir_rvalue {
@@ -1509,6 +1514,7 @@ public:
    union {
       ir_rvalue *lod;		/**< Floating point LOD */
       ir_rvalue *bias;		/**< Floating point LOD bias */
+      ir_rvalue *sample_index;  /**< MSAA sample index */
       struct {
 	 ir_rvalue *dPdx;	/**< Partial derivative of coordinate wrt X */
 	 ir_rvalue *dPdy;	/**< Partial derivative of coordinate wrt Y */
diff --git a/mesalib/src/glsl/ir_clone.cpp b/mesalib/src/glsl/ir_clone.cpp
index b94ff05df..4797451d7 100644
--- a/mesalib/src/glsl/ir_clone.cpp
+++ b/mesalib/src/glsl/ir_clone.cpp
@@ -252,6 +252,9 @@ ir_texture::clone(void *mem_ctx, struct hash_table *ht) const
    case ir_txs:
       new_tex->lod_info.lod = this->lod_info.lod->clone(mem_ctx, ht);
       break;
+   case ir_txf_ms:
+      new_tex->lod_info.sample_index = this->lod_info.sample_index->clone(mem_ctx, ht);
+      break;
    case ir_txd:
       new_tex->lod_info.grad.dPdx = this->lod_info.grad.dPdx->clone(mem_ctx, ht);
       new_tex->lod_info.grad.dPdy = this->lod_info.grad.dPdy->clone(mem_ctx, ht);
diff --git a/mesalib/src/glsl/ir_constant_expression.cpp b/mesalib/src/glsl/ir_constant_expression.cpp
index 86b863f31..c2d0dc46c 100644
--- a/mesalib/src/glsl/ir_constant_expression.cpp
+++ b/mesalib/src/glsl/ir_constant_expression.cpp
@@ -1248,6 +1248,19 @@ ir_expression::constant_expression_value(struct hash_table *variable_context)
       }
       break;
 
+   case ir_triop_lrp: {
+      assert(op[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(op[1]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(op[2]->type->base_type == GLSL_TYPE_FLOAT);
+
+      unsigned c2_inc = op[2]->type->is_scalar() ? 0 : 1;
+      for (unsigned c = 0, c2 = 0; c < components; c2 += c2_inc, c++) {
+         data.f[c] = op[0]->value.f[c] * (1.0f - op[2]->value.f[c2]) +
+                     (op[1]->value.f[c] * op[2]->value.f[c2]);
+      }
+      break;
+   }
+
    case ir_quadop_vector:
       for (unsigned c = 0; c < this->type->vector_elements; c++) {
 	 switch (this->type->base_type) {
diff --git a/mesalib/src/glsl/ir_hv_accept.cpp b/mesalib/src/glsl/ir_hv_accept.cpp
index 3ce895924..5fa75011e 100644
--- a/mesalib/src/glsl/ir_hv_accept.cpp
+++ b/mesalib/src/glsl/ir_hv_accept.cpp
@@ -226,6 +226,11 @@ ir_texture::accept(ir_hierarchical_visitor *v)
       if (s != visit_continue)
 	 return (s == visit_continue_with_parent) ? visit_continue : s;
       break;
+   case ir_txf_ms:
+      s = this->lod_info.sample_index->accept(v);
+      if (s != visit_continue)
+         return (s == visit_continue_with_parent) ? visit_continue : s;
+      break;
    case ir_txd:
       s = this->lod_info.grad.dPdx->accept(v);
       if (s != visit_continue)
diff --git a/mesalib/src/glsl/ir_optimization.h b/mesalib/src/glsl/ir_optimization.h
index 8f3301840..2454bbe6f 100644
--- a/mesalib/src/glsl/ir_optimization.h
+++ b/mesalib/src/glsl/ir_optimization.h
@@ -36,6 +36,7 @@
 #define LOG_TO_LOG2        0x10
 #define MOD_TO_FRACT       0x20
 #define INT_DIV_TO_MUL_RCP 0x40
+#define LRP_TO_ARITH       0x80
 
 /**
  * \see class lower_packing_builtins_visitor
diff --git a/mesalib/src/glsl/ir_print_visitor.cpp b/mesalib/src/glsl/ir_print_visitor.cpp
index acc92dbf1..3bdea9bbc 100644
--- a/mesalib/src/glsl/ir_print_visitor.cpp
+++ b/mesalib/src/glsl/ir_print_visitor.cpp
@@ -260,7 +260,7 @@ void ir_print_visitor::visit(ir_texture *ir)
       printf(" ");
    }
 
-   if (ir->op != ir_txf && ir->op != ir_txs) {
+   if (ir->op != ir_txf && ir->op != ir_txf_ms && ir->op != ir_txs) {
       if (ir->projector)
 	 ir->projector->accept(this);
       else
@@ -287,6 +287,9 @@ void ir_print_visitor::visit(ir_texture *ir)
    case ir_txs:
       ir->lod_info.lod->accept(this);
       break;
+   case ir_txf_ms:
+      ir->lod_info.sample_index->accept(this);
+      break;
    case ir_txd:
       printf("(");
       ir->lod_info.grad.dPdx->accept(this);
diff --git a/mesalib/src/glsl/ir_reader.cpp b/mesalib/src/glsl/ir_reader.cpp
index 405e75b64..22ce03b0d 100644
--- a/mesalib/src/glsl/ir_reader.cpp
+++ b/mesalib/src/glsl/ir_reader.cpp
@@ -676,15 +676,16 @@ ir_reader::read_expression(s_expression *expr)
 {
    s_expression *s_type;
    s_symbol *s_op;
-   s_expression *s_arg1;
+   s_expression *s_arg[3];
 
-   s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
+   s_pattern pat[] = { "expression", s_type, s_op, s_arg[0] };
    if (!PARTIAL_MATCH(expr, pat)) {
       ir_read_error(expr, "expected (expression <type> <operator> "
 			  "<operand> [<operand>])");
       return NULL;
    }
-   s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
+   s_arg[1] = (s_expression *) s_arg[0]->next; // may be tail sentinel
+   s_arg[2] = (s_expression *) s_arg[1]->next; // may be tail sentinel or NULL
 
    const glsl_type *type = read_type(s_type);
    if (type == NULL)
@@ -697,35 +698,27 @@ ir_reader::read_expression(s_expression *expr)
       return NULL;
    }
     
-   unsigned num_operands = ir_expression::get_num_operands(op);
-   if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
-      ir_read_error(expr, "expected (expression <type> %s <operand>)",
-		    s_op->value());
+   int num_operands = -3; /* skip "expression" <type> <operation> */
+   foreach_list(n, &((s_list *) expr)->subexpressions)
+      ++num_operands;
+
+   int expected_operands = ir_expression::get_num_operands(op);
+   if (num_operands != expected_operands) {
+      ir_read_error(expr, "found %d expression operands, expected %d",
+                    num_operands, expected_operands);
       return NULL;
    }
 
-   ir_rvalue *arg1 = read_rvalue(s_arg1);
-   ir_rvalue *arg2 = NULL;
-   if (arg1 == NULL) {
-      ir_read_error(NULL, "when reading first operand of %s", s_op->value());
-      return NULL;
-   }
-
-   if (num_operands == 2) {
-      if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
-	 ir_read_error(expr, "expected (expression <type> %s <operand> "
-			     "<operand>)", s_op->value());
-	 return NULL;
-      }
-      arg2 = read_rvalue(s_arg2);
-      if (arg2 == NULL) {
-	 ir_read_error(NULL, "when reading second operand of %s",
-		       s_op->value());
-	 return NULL;
+   ir_rvalue *arg[3] = {NULL, NULL, NULL};
+   for (int i = 0; i < num_operands; i++) {
+      arg[i] = read_rvalue(s_arg[i]);
+      if (arg[i] == NULL) {
+         ir_read_error(NULL, "when reading operand #%d of %s", i, s_op->value());
+         return NULL;
       }
    }
 
-   return new(mem_ctx) ir_expression(op, type, arg1, arg2);
+   return new(mem_ctx) ir_expression(op, type, arg[0], arg[1], arg[2]);
 }
 
 ir_swizzle *
@@ -918,6 +911,7 @@ ir_reader::read_texture(s_expression *expr)
    s_expression *s_proj = NULL;
    s_list *s_shadow = NULL;
    s_expression *s_lod = NULL;
+   s_expression *s_sample_index = NULL;
 
    ir_texture_opcode op = ir_tex; /* silence warning */
 
@@ -925,6 +919,8 @@ ir_reader::read_texture(s_expression *expr)
       { "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };
    s_pattern txf_pattern[] =
       { "txf", s_type, s_sampler, s_coord, s_offset, s_lod };
+   s_pattern txf_ms_pattern[] =
+      { "txf_ms", s_type, s_sampler, s_coord, s_sample_index };
    s_pattern txs_pattern[] =
       { "txs", s_type, s_sampler, s_lod };
    s_pattern other_pattern[] =
@@ -934,6 +930,8 @@ ir_reader::read_texture(s_expression *expr)
       op = ir_tex;
    } else if (MATCH(expr, txf_pattern)) {
       op = ir_txf;
+   } else if (MATCH(expr, txf_ms_pattern)) {
+      op = ir_txf_ms;
    } else if (MATCH(expr, txs_pattern)) {
       op = ir_txs;
    } else if (MATCH(expr, other_pattern)) {
@@ -973,18 +971,20 @@ ir_reader::read_texture(s_expression *expr)
 	 return NULL;
       }
 
-      // Read texel offset - either 0 or an rvalue.
-      s_int *si_offset = SX_AS_INT(s_offset);
-      if (si_offset == NULL || si_offset->value() != 0) {
-	 tex->offset = read_rvalue(s_offset);
-	 if (tex->offset == NULL) {
-	    ir_read_error(s_offset, "expected 0 or an expression");
-	    return NULL;
-	 }
+      if (op != ir_txf_ms) {
+         // Read texel offset - either 0 or an rvalue.
+         s_int *si_offset = SX_AS_INT(s_offset);
+         if (si_offset == NULL || si_offset->value() != 0) {
+            tex->offset = read_rvalue(s_offset);
+            if (tex->offset == NULL) {
+               ir_read_error(s_offset, "expected 0 or an expression");
+               return NULL;
+            }
+         }
       }
    }
 
-   if (op != ir_txf && op != ir_txs) {
+   if (op != ir_txf && op != ir_txf_ms && op != ir_txs) {
       s_int *proj_as_int = SX_AS_INT(s_proj);
       if (proj_as_int && proj_as_int->value() == 1) {
 	 tex->projector = NULL;
@@ -1027,6 +1027,13 @@ ir_reader::read_texture(s_expression *expr)
 	 return NULL;
       }
       break;
+   case ir_txf_ms:
+      tex->lod_info.sample_index = read_rvalue(s_sample_index);
+      if (tex->lod_info.sample_index == NULL) {
+         ir_read_error(NULL, "when reading sample_index in (txf_ms ...)");
+         return NULL;
+      }
+      break;
    case ir_txd: {
       s_expression *s_dx, *s_dy;
       s_pattern dxdy_pat[] = { s_dx, s_dy };
diff --git a/mesalib/src/glsl/ir_rvalue_visitor.cpp b/mesalib/src/glsl/ir_rvalue_visitor.cpp
index b34a419e8..543c54496 100644
--- a/mesalib/src/glsl/ir_rvalue_visitor.cpp
+++ b/mesalib/src/glsl/ir_rvalue_visitor.cpp
@@ -66,6 +66,9 @@ ir_rvalue_base_visitor::rvalue_visit(ir_texture *ir)
    case ir_txs:
       handle_rvalue(&ir->lod_info.lod);
       break;
+   case ir_txf_ms:
+      handle_rvalue(&ir->lod_info.sample_index);
+      break;
    case ir_txd:
       handle_rvalue(&ir->lod_info.grad.dPdx);
       handle_rvalue(&ir->lod_info.grad.dPdy);
diff --git a/mesalib/src/glsl/ir_validate.cpp b/mesalib/src/glsl/ir_validate.cpp
index d8cafd55f..24ea506dc 100644
--- a/mesalib/src/glsl/ir_validate.cpp
+++ b/mesalib/src/glsl/ir_validate.cpp
@@ -468,6 +468,12 @@ ir_validate::visit_leave(ir_expression *ir)
       assert(ir->operands[1]->type == glsl_type::uint_type);
       break;
 
+   case ir_triop_lrp:
+      assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+      assert(ir->operands[0]->type == ir->operands[1]->type);
+      assert(ir->operands[2]->type == ir->operands[0]->type || ir->operands[2]->type == glsl_type::float_type);
+      break;
+
    case ir_quadop_vector:
       /* The vector operator collects some number of scalars and generates a
        * vector from them.
diff --git a/mesalib/src/glsl/lower_instructions.cpp b/mesalib/src/glsl/lower_instructions.cpp
index a8ef7654e..1ce7b7c9d 100644
--- a/mesalib/src/glsl/lower_instructions.cpp
+++ b/mesalib/src/glsl/lower_instructions.cpp
@@ -37,6 +37,7 @@
  * - POW_TO_EXP2
  * - LOG_TO_LOG2
  * - MOD_TO_FRACT
+ * - LRP_TO_ARITH
  *
  * SUB_TO_ADD_NEG:
  * ---------------
@@ -79,13 +80,20 @@
  * Many GPUs don't have a MOD instruction (945 and 965 included), and
  * if we have to break it down like this anyway, it gives an
  * opportunity to do things like constant fold the (1.0 / op1) easily.
+ *
+ * LRP_TO_ARITH:
+ * -------------
+ * Converts ir_triop_lrp to (op0 * (1.0f - op2)) + (op1 * op2).
  */
 
 #include "main/core.h" /* for M_LOG2E */
 #include "glsl_types.h"
 #include "ir.h"
+#include "ir_builder.h"
 #include "ir_optimization.h"
 
+using namespace ir_builder;
+
 class lower_instructions_visitor : public ir_hierarchical_visitor {
 public:
    lower_instructions_visitor(unsigned lower)
@@ -105,6 +113,7 @@ private:
    void exp_to_exp2(ir_expression *);
    void pow_to_exp2(ir_expression *);
    void log_to_log2(ir_expression *);
+   void lrp_to_arith(ir_expression *);
 };
 
 /**
@@ -268,6 +277,27 @@ lower_instructions_visitor::mod_to_fract(ir_expression *ir)
    this->progress = true;
 }
 
+void
+lower_instructions_visitor::lrp_to_arith(ir_expression *ir)
+{
+   /* (lrp x y a) -> x*(1-a) + y*a */
+
+   /* Save op2 */
+   ir_variable *temp = new(ir) ir_variable(ir->operands[2]->type, "lrp_factor",
+					   ir_var_temporary);
+   this->base_ir->insert_before(temp);
+   this->base_ir->insert_before(assign(temp, ir->operands[2]));
+
+   ir_constant *one = new(ir) ir_constant(1.0f);
+
+   ir->operation = ir_binop_add;
+   ir->operands[0] = mul(ir->operands[0], sub(one, temp));
+   ir->operands[1] = mul(ir->operands[1], temp);
+   ir->operands[2] = NULL;
+
+   this->progress = true;
+}
+
 ir_visitor_status
 lower_instructions_visitor::visit_leave(ir_expression *ir)
 {
@@ -304,6 +334,11 @@ lower_instructions_visitor::visit_leave(ir_expression *ir)
 	 pow_to_exp2(ir);
       break;
 
+   case ir_triop_lrp:
+      if (lowering(LRP_TO_ARITH))
+	 lrp_to_arith(ir);
+      break;
+
    default:
       return visit_continue;
    }
diff --git a/mesalib/src/glsl/opt_algebraic.cpp b/mesalib/src/glsl/opt_algebraic.cpp
index 75948db16..70e016d22 100644
--- a/mesalib/src/glsl/opt_algebraic.cpp
+++ b/mesalib/src/glsl/opt_algebraic.cpp
@@ -186,12 +186,12 @@ ir_algebraic_visitor::swizzle_if_required(ir_expression *expr,
 ir_rvalue *
 ir_algebraic_visitor::handle_expression(ir_expression *ir)
 {
-   ir_constant *op_const[2] = {NULL, NULL};
-   ir_expression *op_expr[2] = {NULL, NULL};
+   ir_constant *op_const[3] = {NULL, NULL, NULL};
+   ir_expression *op_expr[3] = {NULL, NULL, NULL};
    ir_expression *temp;
    unsigned int i;
 
-   assert(ir->get_num_operands() <= 2);
+   assert(ir->get_num_operands() <= 3);
    for (i = 0; i < ir->get_num_operands(); i++) {
       if (ir->operands[i]->type->is_matrix())
 	 return ir;
@@ -415,6 +415,17 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
 
       break;
 
+   case ir_triop_lrp:
+      /* Operands are (x, y, a). */
+      if (is_vec_zero(op_const[2])) {
+         this->progress = true;
+         return swizzle_if_required(ir, ir->operands[0]);
+      } else if (is_vec_one(op_const[2])) {
+         this->progress = true;
+         return swizzle_if_required(ir, ir->operands[1]);
+      }
+      break;
+
    default:
       break;
    }
diff --git a/mesalib/src/glsl/opt_tree_grafting.cpp b/mesalib/src/glsl/opt_tree_grafting.cpp
index 113abb7b0..985540196 100644
--- a/mesalib/src/glsl/opt_tree_grafting.cpp
+++ b/mesalib/src/glsl/opt_tree_grafting.cpp
@@ -285,6 +285,10 @@ ir_tree_grafting_visitor::visit_enter(ir_texture *ir)
       if (do_graft(&ir->lod_info.lod))
 	 return visit_stop;
       break;
+   case ir_txf_ms:
+      if (do_graft(&ir->lod_info.sample_index))
+         return visit_stop;
+      break;
    case ir_txd:
       if (do_graft(&ir->lod_info.grad.dPdx) ||
 	  do_graft(&ir->lod_info.grad.dPdy))
diff --git a/mesalib/src/glsl/standalone_scaffolding.cpp b/mesalib/src/glsl/standalone_scaffolding.cpp
index 0fb4f5b16..8c0091e84 100644
--- a/mesalib/src/glsl/standalone_scaffolding.cpp
+++ b/mesalib/src/glsl/standalone_scaffolding.cpp
@@ -102,6 +102,7 @@ void initialize_context_to_defaults(struct gl_context *ctx, gl_api api)
    ctx->Extensions.ARB_shading_language_packing = true;
    ctx->Extensions.OES_standard_derivatives = true;
    ctx->Extensions.ARB_texture_cube_map_array = true;
+   ctx->Extensions.ARB_texture_multisample = true;
 
    ctx->Const.GLSLVersion = 120;