Merge remote-tracking branch 'origin/released'

* origin/released:
  mesa mkfontscale pixman git update 28 jan 2013

10 files changed, 131 insertions, 44 deletions

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 91234e4d7..281d652a5 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.");