mesa mkfontscale pixman git update 28 jan 2013

mesa: 87592cff57feef29565150b9203e220b50623f30
mkfontscale: b3af8de8d25128f565c2ed2f7c63b6e4099eb84e
pixman: 65fc1adb6545737058e938105ae948a3607c277c

25 files changed, 312 insertions, 129 deletions

diff --git a/mesalib/src/mesa/Android.libmesa_glsl_utils.mk b/mesalib/src/mesa/Android.libmesa_glsl_utils.mk
index 9c5f3493c..47f2e151b 100644
--- a/mesalib/src/mesa/Android.libmesa_glsl_utils.mk
+++ b/mesalib/src/mesa/Android.libmesa_glsl_utils.mk
@@ -35,10 +35,13 @@ include $(CLEAR_VARS)
 
 LOCAL_MODULE := libmesa_glsl_utils
 
-LOCAL_C_INCLUDES := $(MESA_TOP)/src/glsl
+LOCAL_C_INCLUDES := \
+	$(MESA_TOP)/src/glsl \
+	$(MESA_TOP)/src/mapi
 
 LOCAL_SRC_FILES := \
 	main/hash_table.c \
+	main/imports.c \
 	program/prog_hash_table.c \
 	program/symbol_table.c
 
@@ -54,10 +57,13 @@ include $(CLEAR_VARS)
 LOCAL_MODULE := libmesa_glsl_utils
 LOCAL_IS_HOST_MODULE := true
 
-LOCAL_C_INCLUDES := $(MESA_TOP)/src/glsl
+LOCAL_C_INCLUDES := \
+	$(MESA_TOP)/src/glsl \
+	$(MESA_TOP)/src/mapi
 
 LOCAL_SRC_FILES := \
 	main/hash_table.c \
+	main/imports.c \
 	program/prog_hash_table.c \
 	program/symbol_table.c
 
diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c
index 5d01ac8ea..7ae07fb5a 100644
--- a/mesalib/src/mesa/main/extensions.c
+++ b/mesalib/src/mesa/main/extensions.c
@@ -125,6 +125,7 @@ static const struct extension extension_table[] = {
    { "GL_ARB_shader_stencil_export",               o(ARB_shader_stencil_export),               GL,             2009 },
    { "GL_ARB_shader_texture_lod",                  o(ARB_shader_texture_lod),                  GL,             2009 },
    { "GL_ARB_shading_language_100",                o(ARB_shading_language_100),                GLL,            2003 },
+   { "GL_ARB_shading_language_packing",            o(ARB_shading_language_packing),            GL,             2011 },
    { "GL_ARB_shadow",                              o(ARB_shadow),                              GLL,            2001 },
    { "GL_ARB_sync",                                o(ARB_sync),                                GL,             2003 },
    { "GL_ARB_texture_border_clamp",                o(ARB_texture_border_clamp),                GLL,            2000 },
diff --git a/mesalib/src/mesa/main/getstring.c b/mesalib/src/mesa/main/getstring.c
index 1f23cc0a4..aa3a528fd 100644
--- a/mesalib/src/mesa/main/getstring.c
+++ b/mesalib/src/mesa/main/getstring.c
@@ -74,7 +74,9 @@ shading_language_version(struct gl_context *ctx)
       break;
 
    case API_OPENGLES2:
-      return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
+      return (ctx->Version < 30)
+         ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
+         : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
 
    case API_OPENGLES:
       /* fall-through */
diff --git a/mesalib/src/mesa/main/imports.c b/mesalib/src/mesa/main/imports.c
index 76f835e0e..e6f754254 100644
--- a/mesalib/src/mesa/main/imports.c
+++ b/mesalib/src/mesa/main/imports.c
@@ -314,10 +314,43 @@ _mesa_bitcount_64(uint64_t n)
 #endif
 
 
+/* Using C99 rounding functions for roundToEven() implementation is
+ * difficult, because round(), rint, and nearbyint() are affected by
+ * fesetenv(), which the application may have done for its own
+ * purposes.  Mesa's IROUND macro is close to what we want, but it
+ * rounds away from 0 on n + 0.5.
+ */
+int
+_mesa_round_to_even(float val)
+{
+   int rounded = IROUND(val);
+
+   if (val - floor(val) == 0.5) {
+      if (rounded % 2 != 0)
+         rounded += val > 0 ? -1 : 1;
+   }
+
+   return rounded;
+}
+
+
 /**
  * Convert a 4-byte float to a 2-byte half float.
- * Based on code from:
- * http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/008786.html
+ *
+ * Not all float32 values can be represented exactly as a float16 value. We
+ * round such intermediate float32 values to the nearest float16. When the
+ * float32 lies exactly between to float16 values, we round to the one with
+ * an even mantissa.
+ *
+ * This rounding behavior has several benefits:
+ *   - It has no sign bias.
+ *
+ *   - It reproduces the behavior of real hardware: opcode F32TO16 in Intel's
+ *     GPU ISA.
+ *
+ *   - By reproducing the behavior of the GPU (at least on Intel hardware),
+ *     compile-time evaluation of constant packHalf2x16 GLSL expressions will
+ *     result in the same value as if the expression were executed on the GPU.
  */
 GLhalfARB
 _mesa_float_to_half(float val)
@@ -356,32 +389,13 @@ _mesa_float_to_half(float val)
    else {
       /* regular number */
       const int new_exp = flt_e - 127;
-      if (new_exp < -24) {
-         /* this maps to 0 */
-         /* m = 0; - already set */
-         e = 0;
-      }
-      else if (new_exp < -14) {
-         /* this maps to a denorm */
-         unsigned int exp_val = (unsigned int) (-14 - new_exp); /* 2^-exp_val*/
+      if (new_exp < -14) {
+         /* The float32 lies in the range (0.0, min_normal16) and is rounded
+          * to a nearby float16 value. The result will be either zero, subnormal,
+          * or normal.
+          */
          e = 0;
-         switch (exp_val) {
-            case 0:
-               _mesa_warning(NULL,
-                   "float_to_half: logical error in denorm creation!\n");
-               /* m = 0; - already set */
-               break;
-            case 1: m = 512 + (flt_m >> 14); break;
-            case 2: m = 256 + (flt_m >> 15); break;
-            case 3: m = 128 + (flt_m >> 16); break;
-            case 4: m = 64 + (flt_m >> 17); break;
-            case 5: m = 32 + (flt_m >> 18); break;
-            case 6: m = 16 + (flt_m >> 19); break;
-            case 7: m = 8 + (flt_m >> 20); break;
-            case 8: m = 4 + (flt_m >> 21); break;
-            case 9: m = 2 + (flt_m >> 22); break;
-            case 10: m = 1; break;
-         }
+         m = _mesa_round_to_even((1 << 24) * fabsf(fi.f));
       }
       else if (new_exp > 15) {
          /* map this value to infinity */
@@ -389,12 +403,26 @@ _mesa_float_to_half(float val)
          e = 31;
       }
       else {
-         /* regular */
+         /* The float32 lies in the range
+          *   [min_normal16, max_normal16 + max_step16)
+          * and is rounded to a nearby float16 value. The result will be
+          * either normal or infinite.
+          */
          e = new_exp + 15;
-         m = flt_m >> 13;
+         m = _mesa_round_to_even(flt_m / (float) (1 << 13));
       }
    }
 
+   assert(0 <= m && m <= 1024);
+   if (m == 1024) {
+      /* The float32 was rounded upwards into the range of the next exponent,
+       * so bump the exponent. This correctly handles the case where f32
+       * should be rounded up to float16 infinity.
+       */
+      ++e;
+      m = 0;
+   }
+
    result = (s << 15) | (e << 10) | m;
    return result;
 }
diff --git a/mesalib/src/mesa/main/imports.h b/mesalib/src/mesa/main/imports.h
index 8446ea2a3..4b783818b 100644
--- a/mesalib/src/mesa/main/imports.h
+++ b/mesalib/src/mesa/main/imports.h
@@ -548,6 +548,9 @@ _mesa_fls(unsigned int n)
 #endif
 }
 
+extern int
+_mesa_round_to_even(float val);
+
 extern GLhalfARB
 _mesa_float_to_half(float f);
 
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index d37e6c4c0..3369623f7 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -2273,11 +2273,30 @@ typedef enum
 struct gl_uniform_buffer_variable
 {
    char *Name;
+
+   /**
+    * Name of the uniform as seen by glGetUniformIndices.
+    *
+    * glGetUniformIndices requires that the block instance index \b not be
+    * present in the name of queried uniforms.
+    *
+    * \note
+    * \c gl_uniform_buffer_variable::IndexName and
+    * \c gl_uniform_buffer_variable::Name may point to identical storage.
+    */
+   char *IndexName;
+
    const struct glsl_type *Type;
    unsigned int Offset;
    GLboolean RowMajor;
 };
 
+enum gl_uniform_block_packing {
+   ubo_packing_std140,
+   ubo_packing_shared,
+   ubo_packing_packed
+};
+
 struct gl_uniform_block
 {
    /** Declared name of the uniform block */
@@ -2299,6 +2318,14 @@ struct gl_uniform_block
     * (GL_UNIFORM_BLOCK_DATA_SIZE).
     */
    GLuint UniformBufferSize;
+
+   /**
+    * Layout specified in the shader
+    *
+    * This isn't accessible through the API, but it is used while
+    * cross-validating uniform blocks.
+    */
+   enum gl_uniform_block_packing _Packing;
 };
 
 /**
@@ -3042,6 +3069,7 @@ struct gl_extensions
    GLboolean ARB_shader_stencil_export;
    GLboolean ARB_shader_texture_lod;
    GLboolean ARB_shading_language_100;
+   GLboolean ARB_shading_language_packing;
    GLboolean ARB_shadow;
    GLboolean ARB_sync;
    GLboolean ARB_texture_border_clamp;
diff --git a/mesalib/src/mesa/main/remap.c b/mesalib/src/mesa/main/remap.c
index c89fba453..a09870561 100644
--- a/mesalib/src/mesa/main/remap.c
+++ b/mesalib/src/mesa/main/remap.c
@@ -208,8 +208,10 @@ _mesa_do_init_remap_table(const char *pool,
       offset = _mesa_map_function_spec(spec);
       /* store the dispatch offset in the remap table */
       driDispatchRemapTable[i] = offset;
-      if (offset < 0)
-         _mesa_warning(NULL, "failed to remap index %d", i);
+      if (offset < 0) {
+         const char *name = spec + strlen(spec) + 1;
+         _mesa_warning(NULL, "failed to remap %s", name);
+      }
    }
 }
 
diff --git a/mesalib/src/mesa/main/shader_query.cpp b/mesalib/src/mesa/main/shader_query.cpp
index 27b1b8f56..3014a9778 100644
--- a/mesalib/src/mesa/main/shader_query.cpp
+++ b/mesalib/src/mesa/main/shader_query.cpp
@@ -106,7 +106,7 @@ _mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index,
       const ir_variable *const var = ((ir_instruction *) node)->as_variable();
 
       if (var == NULL
-	  || var->mode != ir_var_in
+	  || var->mode != ir_var_shader_in
 	  || var->location == -1)
 	 continue;
 
@@ -169,7 +169,7 @@ _mesa_GetAttribLocation(GLhandleARB program, const GLcharARB * name)
        *     attribute, or if an error occurs, -1 will be returned."
        */
       if (var == NULL
-	  || var->mode != ir_var_in
+	  || var->mode != ir_var_shader_in
 	  || var->location == -1
 	  || var->location < VERT_ATTRIB_GENERIC0)
 	 continue;
@@ -197,7 +197,7 @@ _mesa_count_active_attribs(struct gl_shader_program *shProg)
       const ir_variable *const var = ((ir_instruction *) node)->as_variable();
 
       if (var == NULL
-	  || var->mode != ir_var_in
+	  || var->mode != ir_var_shader_in
 	  || var->location == -1)
 	 continue;
 
@@ -223,7 +223,7 @@ _mesa_longest_attribute_name_length(struct gl_shader_program *shProg)
       const ir_variable *const var = ((ir_instruction *) node)->as_variable();
 
       if (var == NULL
-	  || var->mode != ir_var_in
+	  || var->mode != ir_var_shader_in
 	  || var->location == -1)
 	 continue;
 
@@ -333,7 +333,7 @@ _mesa_GetFragDataIndex(GLuint program, const GLchar *name)
        *     attribute, or if an error occurs, -1 will be returned."
        */
       if (var == NULL
-          || var->mode != ir_var_out
+          || var->mode != ir_var_shader_out
           || var->location == -1
           || var->location < FRAG_RESULT_DATA0)
          continue;
@@ -389,7 +389,7 @@ _mesa_GetFragDataLocation(GLuint program, const GLchar *name)
        *     attribute, or if an error occurs, -1 will be returned."
        */
       if (var == NULL
-	  || var->mode != ir_var_out
+	  || var->mode != ir_var_shader_out
 	  || var->location == -1
 	  || var->location < FRAG_RESULT_DATA0)
 	 continue;
diff --git a/mesalib/src/mesa/main/texparam.c b/mesalib/src/mesa/main/texparam.c
index 8d0ae16fb..52ede13c0 100644
--- a/mesalib/src/mesa/main/texparam.c
+++ b/mesalib/src/mesa/main/texparam.c
@@ -1388,10 +1388,10 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
          if (ctx->API != API_OPENGLES || !ctx->Extensions.OES_draw_texture)
             goto invalid_pname;
 
-         params[0] = obj->CropRect[0];
-         params[1] = obj->CropRect[1];
-         params[2] = obj->CropRect[2];
-         params[3] = obj->CropRect[3];
+         params[0] = (GLfloat) obj->CropRect[0];
+         params[1] = (GLfloat) obj->CropRect[1];
+         params[2] = (GLfloat) obj->CropRect[2];
+         params[3] = (GLfloat) obj->CropRect[3];
          break;
 
       case GL_TEXTURE_SWIZZLE_R_EXT:
diff --git a/mesalib/src/mesa/main/uniforms.c b/mesalib/src/mesa/main/uniforms.c
index 62c85b3c0..d902407a0 100644
--- a/mesalib/src/mesa/main/uniforms.c
+++ b/mesalib/src/mesa/main/uniforms.c
@@ -695,7 +695,7 @@ _mesa_GetActiveUniformBlockiv(GLuint program,
       for (i = 0; i < block->NumUniforms; i++) {
 	 unsigned offset;
 	 params[i] = _mesa_get_uniform_location(ctx, shProg,
-						block->Uniforms[i].Name,
+						block->Uniforms[i].IndexName,
 						&offset);
       }
       return;
diff --git a/mesalib/src/mesa/main/version.c b/mesalib/src/mesa/main/version.c
index 4373d7b91..e944a5518 100644
--- a/mesalib/src/mesa/main/version.c
+++ b/mesalib/src/mesa/main/version.c
@@ -323,7 +323,30 @@ compute_version_es2(struct gl_context *ctx)
                               ctx->Extensions.ARB_fragment_shader &&
                               ctx->Extensions.ARB_texture_non_power_of_two &&
                               ctx->Extensions.EXT_blend_equation_separate);
-   if (ver_2_0) {
+   /* FINISHME: This list isn't quite right. */
+   const GLboolean ver_3_0 = (ctx->Extensions.ARB_half_float_vertex &&
+                              ctx->Extensions.ARB_internalformat_query &&
+                              ctx->Extensions.ARB_map_buffer_range &&
+                              ctx->Extensions.ARB_shader_texture_lod &&
+                              ctx->Extensions.ARB_texture_float &&
+                              ctx->Extensions.ARB_texture_rg &&
+                              ctx->Extensions.ARB_texture_compression_rgtc &&
+                              ctx->Extensions.EXT_draw_buffers2 &&
+                              /* ctx->Extensions.ARB_framebuffer_object && */
+                              ctx->Extensions.EXT_framebuffer_sRGB &&
+                              ctx->Extensions.EXT_packed_float &&
+                              ctx->Extensions.EXT_texture_array &&
+                              ctx->Extensions.EXT_texture_shared_exponent &&
+                              ctx->Extensions.EXT_transform_feedback &&
+                              ctx->Extensions.NV_conditional_render &&
+                              ctx->Extensions.ARB_draw_instanced &&
+                              ctx->Extensions.ARB_uniform_buffer_object &&
+                              ctx->Extensions.EXT_texture_snorm &&
+                              ctx->Extensions.NV_primitive_restart &&
+                              ctx->Extensions.OES_depth_texture_cube_map);
+   if (ver_3_0) {
+      ctx->Version = 30;
+   } else if (ver_2_0) {
       ctx->Version = 20;
    } else {
       _mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support.");
diff --git a/mesalib/src/mesa/program/ir_to_mesa.cpp b/mesalib/src/mesa/program/ir_to_mesa.cpp
index 0f7439b3b..cd89171da 100644
--- a/mesalib/src/mesa/program/ir_to_mesa.cpp
+++ b/mesalib/src/mesa/program/ir_to_mesa.cpp
@@ -623,10 +623,14 @@ type_size(const struct glsl_type *type)
        * at link time.
        */
       return 1;
-   default:
-      assert(0);
-      return 0;
+   case GLSL_TYPE_VOID:
+   case GLSL_TYPE_ERROR:
+   case GLSL_TYPE_INTERFACE:
+      assert(!"Invalid type in type_size");
+      break;
    }
+
+   return 0;
 }
 
 /**
@@ -1427,7 +1431,21 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
    case ir_unop_fract:
       emit(ir, OPCODE_FRC, result_dst, op[0]);
       break;
-
+   case ir_unop_pack_snorm_2x16:
+   case ir_unop_pack_snorm_4x8:
+   case ir_unop_pack_unorm_2x16:
+   case ir_unop_pack_unorm_4x8:
+   case ir_unop_pack_half_2x16:
+   case ir_unop_unpack_snorm_2x16:
+   case ir_unop_unpack_snorm_4x8:
+   case ir_unop_unpack_unorm_2x16:
+   case ir_unop_unpack_unorm_4x8:
+   case ir_unop_unpack_half_2x16:
+   case ir_unop_unpack_half_2x16_split_x:
+   case ir_unop_unpack_half_2x16_split_y:
+   case ir_binop_pack_half_2x16_split:
+      assert(!"not supported");
+      break;
    case ir_binop_min:
       emit(ir, OPCODE_MIN, result_dst, op[0], op[1]);
       break;
@@ -1529,21 +1547,18 @@ ir_to_mesa_visitor::visit(ir_dereference_variable *ir)
 					       var->location);
 	 this->variables.push_tail(entry);
 	 break;
-      case ir_var_in:
-      case ir_var_inout:
+      case ir_var_shader_in:
 	 /* The linker assigns locations for varyings and attributes,
 	  * including deprecated builtins (like gl_Color),
 	  * user-assigned generic attributes (glBindVertexLocation),
 	  * and user-defined varyings.
-	  *
-	  * FINISHME: We would hit this path for function arguments.  Fix!
 	  */
 	 assert(var->location != -1);
          entry = new(mem_ctx) variable_storage(var,
                                                PROGRAM_INPUT,
                                                var->location);
          break;
-      case ir_var_out:
+      case ir_var_shader_out:
 	 assert(var->location != -1);
          entry = new(mem_ctx) variable_storage(var,
                                                PROGRAM_OUTPUT,
@@ -2378,7 +2393,8 @@ public:
    }
 
 private:
-   virtual void visit_field(const glsl_type *type, const char *name);
+   virtual void visit_field(const glsl_type *type, const char *name,
+                            bool row_major);
 
    struct gl_shader_program *shader_program;
    struct gl_program_parameter_list *params;
@@ -2386,10 +2402,13 @@ private:
 };
 
 void
-add_uniform_to_shader::visit_field(const glsl_type *type, const char *name)
+add_uniform_to_shader::visit_field(const glsl_type *type, const char *name,
+                                   bool row_major)
 {
    unsigned int size;
 
+   (void) row_major;
+
    if (type->is_vector() || type->is_scalar()) {
       size = type->vector_elements;
    } else {
@@ -2459,7 +2478,7 @@ _mesa_generate_parameters_list_for_uniforms(struct gl_shader_program
       ir_variable *var = ((ir_instruction *) node)->as_variable();
 
       if ((var == NULL) || (var->mode != ir_var_uniform)
-	  || var->uniform_block != -1 || (strncmp(var->name, "gl_", 3) == 0))
+	  || var->is_in_uniform_block() || (strncmp(var->name, "gl_", 3) == 0))
 	 continue;
 
       add.process(var);
@@ -2522,7 +2541,11 @@ _mesa_associate_uniform_storage(struct gl_context *ctx,
 	    format = uniform_native;
 	    columns = 1;
 	    break;
-	 default:
+         case GLSL_TYPE_ARRAY:
+         case GLSL_TYPE_VOID:
+         case GLSL_TYPE_STRUCT:
+         case GLSL_TYPE_ERROR:
+         case GLSL_TYPE_INTERFACE:
 	    assert(!"Should not get here.");
 	    break;
 	 }
diff --git a/mesalib/src/mesa/program/program.c b/mesalib/src/mesa/program/program.c
index 993803dd5..fb0aeb7ed 100644
--- a/mesalib/src/mesa/program/program.c
+++ b/mesalib/src/mesa/program/program.c
@@ -696,7 +696,7 @@ _mesa_combine_programs(struct gl_context *ctx,
    const GLuint newLength = lenA + lenB;
    GLboolean usedTemps[MAX_PROGRAM_TEMPS];
    GLuint firstTemp = 0;
-   GLbitfield inputsB;
+   GLbitfield64 inputsB;
    GLuint i;
 
    ASSERT(progA->Target == progB->Target);
@@ -724,7 +724,7 @@ _mesa_combine_programs(struct gl_context *ctx,
    if (newProg->Target == GL_FRAGMENT_PROGRAM_ARB) {
       const struct gl_fragment_program *fprogA, *fprogB;
       struct gl_fragment_program *newFprog;
-      GLbitfield progB_inputsRead = progB->InputsRead;
+      GLbitfield64 progB_inputsRead = progB->InputsRead;
       GLint progB_colorFile, progB_colorIndex;
 
       fprogA = gl_fragment_program_const(progA);
@@ -840,8 +840,8 @@ _mesa_find_used_registers(const struct gl_program *prog,
 
       for (j = 0; j < n; j++) {
          if (inst->SrcReg[j].File == file) {
-            ASSERT(inst->SrcReg[j].Index < usedSize);
-            if(inst->SrcReg[j].Index < usedSize)
+            ASSERT(inst->SrcReg[j].Index < (GLint) usedSize);
+            if (inst->SrcReg[j].Index < (GLint) usedSize)
                used[inst->SrcReg[j].Index] = GL_TRUE;
          }
       }
@@ -908,23 +908,23 @@ _mesa_valid_register_index(const struct gl_context *ctx,
       return GL_TRUE;  /* XXX or maybe false? */
 
    case PROGRAM_TEMPORARY:
-      return index >= 0 && index < c->MaxTemps;
+      return index >= 0 && index < (GLint) c->MaxTemps;
 
    case PROGRAM_ENV_PARAM:
-      return index >= 0 && index < c->MaxEnvParams;
+      return index >= 0 && index < (GLint) c->MaxEnvParams;
 
    case PROGRAM_LOCAL_PARAM:
-      return index >= 0 && index < c->MaxLocalParams;
+      return index >= 0 && index < (GLint) c->MaxLocalParams;
 
    case PROGRAM_UNIFORM:
    case PROGRAM_STATE_VAR:
       /* aka constant buffer */
-      return index >= 0 && index < c->MaxUniformComponents / 4;
+      return index >= 0 && index < (GLint) c->MaxUniformComponents / 4;
 
    case PROGRAM_CONSTANT:
       /* constant buffer w/ possible relative negative addressing */
       return (index > (int) c->MaxUniformComponents / -4 &&
-              index < c->MaxUniformComponents / 4);
+              index < (int) c->MaxUniformComponents / 4);
 
    case PROGRAM_INPUT:
       if (index < 0)
@@ -932,11 +932,11 @@ _mesa_valid_register_index(const struct gl_context *ctx,
 
       switch (shaderType) {
       case MESA_SHADER_VERTEX:
-         return index < VERT_ATTRIB_GENERIC0 + c->MaxAttribs;
+         return index < VERT_ATTRIB_GENERIC0 + (GLint) c->MaxAttribs;
       case MESA_SHADER_FRAGMENT:
-         return index < FRAG_ATTRIB_VAR0 + ctx->Const.MaxVarying;
+         return index < FRAG_ATTRIB_VAR0 + (GLint) ctx->Const.MaxVarying;
       case MESA_SHADER_GEOMETRY:
-         return index < GEOM_ATTRIB_VAR0 + ctx->Const.MaxVarying;
+         return index < GEOM_ATTRIB_VAR0 + (GLint) ctx->Const.MaxVarying;
       default:
          return GL_FALSE;
       }
@@ -947,17 +947,17 @@ _mesa_valid_register_index(const struct gl_context *ctx,
 
       switch (shaderType) {
       case MESA_SHADER_VERTEX:
-         return index < VERT_RESULT_VAR0 + ctx->Const.MaxVarying;
+         return index < VERT_RESULT_VAR0 + (GLint) ctx->Const.MaxVarying;
       case MESA_SHADER_FRAGMENT:
-         return index < FRAG_RESULT_DATA0 + ctx->Const.MaxDrawBuffers;
+         return index < FRAG_RESULT_DATA0 + (GLint) ctx->Const.MaxDrawBuffers;
       case MESA_SHADER_GEOMETRY:
-         return index < GEOM_RESULT_VAR0 + ctx->Const.MaxVarying;
+         return index < GEOM_RESULT_VAR0 + (GLint) ctx->Const.MaxVarying;
       default:
          return GL_FALSE;
       }
 
    case PROGRAM_ADDRESS:
-      return index >= 0 && index < c->MaxAddressRegs;
+      return index >= 0 && index < (GLint) c->MaxAddressRegs;
 
    default:
       _mesa_problem(ctx,
diff --git a/mesalib/src/mesa/state_tracker/st_cb_bitmap.c b/mesalib/src/mesa/state_tracker/st_cb_bitmap.c
index 843dc5be3..63dbdb29b 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_bitmap.c
@@ -350,9 +350,8 @@ setup_bitmap_vertex_data(struct st_context *st, bool normalized,
       tBot = (GLfloat) height;
    }
 
-   u_upload_alloc(st->uploader, 0, 4 * sizeof(vertices[0]), vbuf_offset, vbuf,
-		  (void**)&vertices);
-   if (!vbuf) {
+   if (u_upload_alloc(st->uploader, 0, 4 * sizeof(vertices[0]),
+                      vbuf_offset, vbuf, (void **) &vertices) != PIPE_OK) {
       return;
    }
 
diff --git a/mesalib/src/mesa/state_tracker/st_cb_clear.c b/mesalib/src/mesa/state_tracker/st_cb_clear.c
index d01236e28..a5aa8f496 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_clear.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_clear.c
@@ -141,9 +141,8 @@ draw_quad(struct st_context *st,
    GLuint i, offset;
    float (*vertices)[2][4];  /**< vertex pos + color */
 
-   u_upload_alloc(st->uploader, 0, 4 * sizeof(vertices[0]), &offset, &vbuf,
-		  (void**)&vertices);
-   if (!vbuf) {
+   if (u_upload_alloc(st->uploader, 0, 4 * sizeof(vertices[0]),
+                      &offset, &vbuf, (void **) &vertices) != PIPE_OK) {
       return;
    }
 
diff --git a/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c b/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c
index ff8a9dc43..c944b81f6 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -568,9 +568,8 @@ draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z,
    struct pipe_resource *buf = NULL;
    unsigned offset;
 
-   u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), &offset, &buf,
-		  (void**)&verts);
-   if (!buf) {
+   if (u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), &offset,
+                      &buf, (void **) &verts) != PIPE_OK) {
       return;
    }
 
@@ -795,7 +794,7 @@ draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
    y1 = y + height * ctx->Pixel.ZoomY;
 
    /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
-   z = z * 2.0 - 1.0;
+   z = z * 2.0f - 1.0f;
 
    draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex,
              normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width,
@@ -1063,7 +1062,7 @@ static void
 clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height,
            struct gl_pixelstore_attrib *unpack)
 {
-   const unsigned maxSize = 
+   const int maxSize =
       1 << (pipe->screen->get_param(pipe->screen,
                                     PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
 
diff --git a/mesalib/src/mesa/state_tracker/st_cb_drawtex.c b/mesalib/src/mesa/state_tracker/st_cb_drawtex.c
index 269068da2..5ca097004 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_drawtex.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_drawtex.c
@@ -148,10 +148,9 @@ st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
       GLfloat *vbuf = NULL;
       GLuint attr;
 
-      u_upload_alloc(st->uploader, 0,
-		     numAttribs * 4 * 4 * sizeof(GLfloat),
-		     &offset, &vbuffer, (void**)&vbuf);
-      if (!vbuffer) {
+      if (u_upload_alloc(st->uploader, 0,
+                         numAttribs * 4 * 4 * sizeof(GLfloat),
+                         &offset, &vbuffer, (void **) &vbuf) != PIPE_OK) {
          return;
       }
       
diff --git a/mesalib/src/mesa/state_tracker/st_cb_texture.c b/mesalib/src/mesa/state_tracker/st_cb_texture.c
index 7f07b741e..3cea2df07 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_texture.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_texture.c
@@ -1555,6 +1555,7 @@ void
 st_init_texture_functions(struct dd_function_table *functions)
 {
    functions->ChooseTextureFormat = st_ChooseTextureFormat;
+   functions->QuerySamplesForFormat = st_QuerySamplesForFormat;
    functions->TexImage = st_TexImage;
    functions->TexSubImage = _mesa_store_texsubimage;
    functions->CompressedTexSubImage = _mesa_store_compressed_texsubimage;
diff --git a/mesalib/src/mesa/state_tracker/st_draw.c b/mesalib/src/mesa/state_tracker/st_draw.c
index de539ca5a..de62264a1 100644
--- a/mesalib/src/mesa/state_tracker/st_draw.c
+++ b/mesalib/src/mesa/state_tracker/st_draw.c
@@ -84,7 +84,12 @@ all_varyings_in_vbos(const struct gl_client_array *arrays[])
 }
 
 
-static void
+/**
+ * Basically, translate Mesa's index buffer information into
+ * a pipe_index_buffer object.
+ * \return TRUE or FALSE for success/failure
+ */
+static boolean
 setup_index_buffer(struct st_context *st,
                    const struct _mesa_index_buffer *ib,
                    struct pipe_index_buffer *ibuffer)
@@ -100,8 +105,12 @@ setup_index_buffer(struct st_context *st,
       ibuffer->offset = pointer_to_offset(ib->ptr);
    }
    else if (st->indexbuf_uploader) {
-      u_upload_data(st->indexbuf_uploader, 0, ib->count * ibuffer->index_size,
-                    ib->ptr, &ibuffer->offset, &ibuffer->buffer);
+      if (u_upload_data(st->indexbuf_uploader, 0,
+                        ib->count * ibuffer->index_size, ib->ptr,
+                        &ibuffer->offset, &ibuffer->buffer) != PIPE_OK) {
+         /* out of memory */
+         return FALSE;
+      }
       u_upload_unmap(st->indexbuf_uploader);
    }
    else {
@@ -110,6 +119,7 @@ setup_index_buffer(struct st_context *st,
    }
 
    cso_set_index_buffer(st->cso_context, ibuffer);
+   return TRUE;
 }
 
 
@@ -220,7 +230,10 @@ st_draw_vbo(struct gl_context *ctx,
             vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
                                    nr_prims);
 
-      setup_index_buffer(st, ib, &ibuffer);
+      if (!setup_index_buffer(st, ib, &ibuffer)) {
+         /* out of memory */
+         return;
+      }
 
       info.indexed = TRUE;
       if (min_index != ~0 && max_index != ~0) {
diff --git a/mesalib/src/mesa/state_tracker/st_extensions.c b/mesalib/src/mesa/state_tracker/st_extensions.c
index 18d89815d..af54cf7c8 100644
--- a/mesalib/src/mesa/state_tracker/st_extensions.c
+++ b/mesalib/src/mesa/state_tracker/st_extensions.c
@@ -516,6 +516,7 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.ARB_fragment_shader = GL_TRUE;
    ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
    ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
+   ctx->Extensions.ARB_internalformat_query = GL_TRUE;
    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
    ctx->Extensions.ARB_shader_objects = GL_TRUE;
    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
@@ -594,9 +595,10 @@ void st_init_extensions(struct st_context *st)
       ctx->Const.NativeIntegers = GL_TRUE;
       ctx->Const.MaxClipPlanes = 8;
 
-      /* Extensions that only depend on GLSL 1.3. */
+      /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
       ctx->Extensions.ARB_conservative_depth = GL_TRUE;
       ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
+      ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
    } else {
       /* Optional integer support for GLSL 1.2. */
       if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
diff --git a/mesalib/src/mesa/state_tracker/st_format.c b/mesalib/src/mesa/state_tracker/st_format.c
index af81f732d..7ef063953 100644
--- a/mesalib/src/mesa/state_tracker/st_format.c
+++ b/mesalib/src/mesa/state_tracker/st_format.c
@@ -1642,6 +1642,40 @@ st_ChooseTextureFormat(struct gl_context *ctx, GLenum target,
 }
 
 
+/**
+ * Called via ctx->Driver.ChooseTextureFormat().
+ */
+size_t
+st_QuerySamplesForFormat(struct gl_context *ctx, GLenum internalFormat,
+                         int samples[16])
+{
+   struct pipe_screen *screen = st_context(ctx)->pipe->screen;
+   enum pipe_format format;
+   unsigned i, bind, num_sample_counts = 0;
+
+   if (_mesa_is_depth_or_stencil_format(internalFormat))
+      bind = PIPE_BIND_DEPTH_STENCIL;
+   else
+      bind = PIPE_BIND_RENDER_TARGET;
+
+   /* Set sample counts in descending order. */
+   for (i = 16; i > 1; i--) {
+      format = st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
+                                PIPE_TEXTURE_2D, i, bind);
+
+      if (format != PIPE_FORMAT_NONE) {
+         samples[num_sample_counts++] = i;
+      }
+   }
+
+   if (!num_sample_counts) {
+      samples[num_sample_counts++] = 1;
+   }
+
+   return num_sample_counts;
+}
+
+
 GLboolean
 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
 {
diff --git a/mesalib/src/mesa/state_tracker/st_format.h b/mesalib/src/mesa/state_tracker/st_format.h
index 39397b17a..cb6e5bc96 100644
--- a/mesalib/src/mesa/state_tracker/st_format.h
+++ b/mesalib/src/mesa/state_tracker/st_format.h
@@ -67,6 +67,9 @@ st_ChooseTextureFormat(struct gl_context * ctx, GLenum target,
                        GLint internalFormat,
                        GLenum format, GLenum type);
 
+size_t
+st_QuerySamplesForFormat(struct gl_context *ctx, GLenum internalFormat,
+                         int samples[16]);
 
 /* can we use a sampler view to translate these formats
    only used to make TFP so far */
diff --git a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 1d96e905c..c6ac634a2 100644
--- a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -984,10 +984,13 @@ type_size(const struct glsl_type *type)
        * at link time.
        */
       return 1;
-   default:
-      assert(0);
-      return 0;
+   case GLSL_TYPE_INTERFACE:
+   case GLSL_TYPE_VOID:
+   case GLSL_TYPE_ERROR:
+      assert(!"Invalid type in type_size");
+      break;
    }
+   return 0;
 }
 
 /**
@@ -1932,10 +1935,23 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
       }
       break;
    }
+   case ir_unop_pack_snorm_2x16:
+   case ir_unop_pack_unorm_2x16:
+   case ir_unop_pack_half_2x16:
+   case ir_unop_pack_snorm_4x8:
+   case ir_unop_pack_unorm_4x8:
+   case ir_unop_unpack_snorm_2x16:
+   case ir_unop_unpack_unorm_2x16:
+   case ir_unop_unpack_half_2x16:
+   case ir_unop_unpack_half_2x16_split_x:
+   case ir_unop_unpack_half_2x16_split_y:
+   case ir_unop_unpack_snorm_4x8:
+   case ir_unop_unpack_unorm_4x8:
+   case ir_binop_pack_half_2x16_split:
    case ir_quadop_vector:
-      /* This operation should have already been handled.
+      /* This operation is not supported, or should have already been handled.
        */
-      assert(!"Should not get here.");
+      assert(!"Invalid ir opcode in glsl_to_tgsi_visitor::visit()");
       break;
    }
 
@@ -2001,21 +2017,18 @@ glsl_to_tgsi_visitor::visit(ir_dereference_variable *ir)
         				       var->location);
          this->variables.push_tail(entry);
          break;
-      case ir_var_in:
-      case ir_var_inout:
+      case ir_var_shader_in:
          /* The linker assigns locations for varyings and attributes,
           * including deprecated builtins (like gl_Color), user-assign
           * generic attributes (glBindVertexLocation), and
           * user-defined varyings.
-          *
-          * FINISHME: We would hit this path for function arguments.  Fix!
           */
          assert(var->location != -1);
          entry = new(mem_ctx) variable_storage(var,
                                                PROGRAM_INPUT,
                                                var->location);
          break;
-      case ir_var_out:
+      case ir_var_shader_out:
          assert(var->location != -1);
          entry = new(mem_ctx) variable_storage(var,
                                                PROGRAM_OUTPUT,
@@ -2304,7 +2317,7 @@ glsl_to_tgsi_visitor::visit(ir_assignment *ir)
       assert(!ir->lhs->type->is_scalar() && !ir->lhs->type->is_vector());
       l.writemask = WRITEMASK_XYZW;
    } else if (ir->lhs->type->is_scalar() &&
-              ir->lhs->variable_referenced()->mode == ir_var_out) {
+              ir->lhs->variable_referenced()->mode == ir_var_shader_out) {
       /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the
        * FINISHME: W component of fragment shader output zero, work correctly.
        */
@@ -2581,8 +2594,8 @@ glsl_to_tgsi_visitor::visit(ir_call *ir)
       ir_rvalue *param_rval = (ir_rvalue *)iter.get();
       ir_variable *param = (ir_variable *)sig_iter.get();
 
-      if (param->mode == ir_var_in ||
-          param->mode == ir_var_inout) {
+      if (param->mode == ir_var_function_in ||
+          param->mode == ir_var_function_inout) {
          variable_storage *storage = find_variable_storage(param);
          assert(storage);
 
@@ -2617,8 +2630,8 @@ glsl_to_tgsi_visitor::visit(ir_call *ir)
       ir_rvalue *param_rval = (ir_rvalue *)iter.get();
       ir_variable *param = (ir_variable *)sig_iter.get();
 
-      if (param->mode == ir_var_out ||
-          param->mode == ir_var_inout) {
+      if (param->mode == ir_var_function_out ||
+          param->mode == ir_var_function_inout) {
          variable_storage *storage = find_variable_storage(param);
          assert(storage);
 
diff --git a/mesalib/src/mesa/swrast/s_texfilter.c b/mesalib/src/mesa/swrast/s_texfilter.c
index 0a91cca06..953300f65 100644
--- a/mesalib/src/mesa/swrast/s_texfilter.c
+++ b/mesalib/src/mesa/swrast/s_texfilter.c
@@ -1647,14 +1647,14 @@ sample_2d_ewa(struct gl_context *ctx,
               GLfloat rgba[])
 {
    GLint level = lod > 0 ? lod : 0;
-   GLfloat scaling = 1.0 / (1 << level);
+   GLfloat scaling = 1.0f / (1 << level);
    const struct gl_texture_image *img =	tObj->Image[0][level];
    const struct gl_texture_image *mostDetailedImage =
       tObj->Image[0][tObj->BaseLevel];
    const struct swrast_texture_image *swImg =
       swrast_texture_image_const(mostDetailedImage);
-   GLfloat tex_u=-0.5 + texcoord[0] * swImg->WidthScale * scaling;
-   GLfloat tex_v=-0.5 + texcoord[1] * swImg->HeightScale * scaling;
+   GLfloat tex_u = -0.5f + texcoord[0] * swImg->WidthScale * scaling;
+   GLfloat tex_v = -0.5f + texcoord[1] * swImg->HeightScale * scaling;
 
    GLfloat ux = dudx * scaling;
    GLfloat vx = dvdx * scaling;
@@ -1667,20 +1667,20 @@ sample_2d_ewa(struct gl_context *ctx,
    GLfloat A = vx*vx+vy*vy+1;
    GLfloat B = -2*(ux*vx+uy*vy);
    GLfloat C = ux*ux+uy*uy+1;
-   GLfloat F = A*C-B*B/4.0;
+   GLfloat F = A*C-B*B/4.0f;
 
    /* check if it is an ellipse */
    /* ASSERT(F > 0.0); */
 
    /* Compute the ellipse's (u,v) bounding box in texture space */
-   GLfloat d = -B*B+4.0*C*A;
-   GLfloat box_u = 2.0 / d * sqrt(d*C*F); /* box_u -> half of bbox with   */
-   GLfloat box_v = 2.0 / d * sqrt(A*d*F); /* box_v -> half of bbox height */
+   GLfloat d = -B*B+4.0f*C*A;
+   GLfloat box_u = 2.0f / d * sqrtf(d*C*F); /* box_u -> half of bbox with   */
+   GLfloat box_v = 2.0f / d * sqrtf(A*d*F); /* box_v -> half of bbox height */
 
-   GLint u0 = floor(tex_u - box_u);
-   GLint u1 = ceil (tex_u + box_u);
-   GLint v0 = floor(tex_v - box_v);
-   GLint v1 = ceil (tex_v + box_v);
+   GLint u0 = (GLint) floorf(tex_u - box_u);
+   GLint u1 = (GLint) ceilf (tex_u + box_u);
+   GLint v0 = (GLint) floorf(tex_v - box_v);
+   GLint v1 = (GLint) ceilf (tex_v + box_v);
 
    GLfloat num[4] = {0.0F, 0.0F, 0.0F, 0.0F};
    GLfloat newCoord[2];
@@ -1692,7 +1692,7 @@ sample_2d_ewa(struct gl_context *ctx,
    /* Scale ellipse formula to directly index the Filter Lookup Table.
     * i.e. scale so that F = WEIGHT_LUT_SIZE-1
     */
-   double formScale = (double) (WEIGHT_LUT_SIZE - 1) / F;
+   GLfloat formScale = (GLfloat) (WEIGHT_LUT_SIZE - 1) / F;
    A *= formScale;
    B *= formScale;
    C *= formScale;
@@ -1715,7 +1715,7 @@ sample_2d_ewa(struct gl_context *ctx,
             /* as a LUT is used, q must never be negative;
              * should not happen, though
              */
-            const GLint qClamped = q >= 0.0F ? q : 0;
+            const GLint qClamped = q >= 0.0F ? (GLint) q : 0;
             GLfloat weight = weightLut[qClamped];
 
             newCoord[0] = u / ((GLfloat) img->Width2);
@@ -1795,19 +1795,19 @@ sample_2d_footprint(struct gl_context *ctx,
 
    /*  Calculate the per anisotropic sample offsets in s,t space. */
    if (Px2 > Py2) {
-      numSamples = ceil(sqrtf(Px2));
+      numSamples = (GLint) ceilf(sqrtf(Px2));
       ds = ux / ((GLfloat) img->Width2);
       dt = vx / ((GLfloat) img->Height2);
    }
    else {
-      numSamples = ceil(sqrtf(Py2));
+      numSamples = (GLint) ceilf(sqrtf(Py2));
       ds = uy / ((GLfloat) img->Width2);
       dt = vy / ((GLfloat) img->Height2);
    }
 
    for (s = 0; s<numSamples; s++) {
-      newCoord[0] = texcoord[0] + ds * ((GLfloat)(s+1) / (numSamples+1) -0.5);
-      newCoord[1] = texcoord[1] + dt * ((GLfloat)(s+1) / (numSamples+1) -0.5);
+      newCoord[0] = texcoord[0] + ds * ((GLfloat)(s+1) / (numSamples+1) -0.5f);
+      newCoord[1] = texcoord[1] + dt * ((GLfloat)(s+1) / (numSamples+1) -0.5f);
 
       sample_2d_linear(ctx, samp, img, newCoord, rgba);
       num[0] += rgba[0];
@@ -1956,7 +1956,7 @@ sample_lambda_2d_aniso(struct gl_context *ctx,
       /* note: we need to have Pmin=sqrt(Pmin2) here, but we can avoid
        * this since 0.5*log(x) = log(sqrt(x))
        */
-      lod = 0.5 * LOG2(Pmin2);
+      lod = 0.5f * LOG2(Pmin2);
       
       if (adjustLOD) {
          /* from swrast/s_texcombine.c _swrast_texture_span */
@@ -1988,7 +1988,7 @@ sample_lambda_2d_aniso(struct gl_context *ctx,
           * seem to be worth the extra running time.
           */
          sample_2d_ewa(ctx, samp, tObj, texcoords[i],
-                       dudx, dvdx, dudy, dvdy, floor(lod), rgba[i]);
+                       dudx, dvdx, dudy, dvdy, (GLint) floorf(lod), rgba[i]);
 
          /* unused: */
          (void) sample_2d_footprint;
diff --git a/mesalib/src/mesa/vbo/vbo_exec_api.c b/mesalib/src/mesa/vbo/vbo_exec_api.c
index 985f2209c..353f8cfde 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_api.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_api.c
@@ -124,6 +124,11 @@ void vbo_exec_vtx_wrap( struct vbo_exec_context *exec )
     */
    vbo_exec_wrap_buffers( exec );
    
+   if (!exec->vtx.buffer_ptr) {
+      /* probably ran out of memory earlier when allocating the VBO */
+      return;
+   }
+
    /* Copy stored stored vertices to start of new list. 
     */
    assert(exec->vtx.max_vert - exec->vtx.vert_count > exec->vtx.copied.nr);