[Mesa-dev] [PATCH 2/2] mesa: remove duplicate array index validation and extra uniform location lookup

Martin Peres martin.peres at linux.intel.com
Fri Jul 3 05:08:24 PDT 2015



On 03/07/15 13:55, Timothy Arceri wrote:
> This change removes multiple functions designed to validate an array
> subscript and replaces them with a call to a single function.
>
> The change also means that validation is now only done once and the index
> is retrived at the same time, as a result the getUniformLocation code can
> be merged saving an extra hash table lookup (and yet another validation call).
>
> Cc: Martin Peres <martin.peres at linux.intel.com>
> Cc: Tapani Pälli <tapani.palli at intel.com>
> ---
>   This clean-up was done to allow AoA program interface query support to be
>   implemented more easily. When applied to my latest AoA work all but one
>   AoA program interface query subtest for the CTS now passes.
>
>   No Piglit regressions.
>
>   I also ran the following tests in the CTS without regression:
>
>   - ES31-CTS.program_interface_query*
>   - ES3-CTS.gtf.GL3Tests.explicit_attrib_location.explicit_attrib_location_room
>   - ES3-CTS.gtf.GL3Tests.draw_instanced.draw_instanced_max_vertex_attribs
>
>   src/mesa/main/program_resource.c |  66 ++-----------
>   src/mesa/main/shader_query.cpp   | 206 ++++++++++++++++-----------------------
>   src/mesa/main/shaderapi.h        |   7 +-
>   src/mesa/main/uniform_query.cpp  |  75 --------------
>   src/mesa/main/uniforms.c         |   7 +-
>   src/mesa/main/uniforms.h         |   4 -
>   6 files changed, 100 insertions(+), 265 deletions(-)
>
> diff --git a/src/mesa/main/program_resource.c b/src/mesa/main/program_resource.c
> index d857b84..0a306b8 100644
> --- a/src/mesa/main/program_resource.c
> +++ b/src/mesa/main/program_resource.c
> @@ -173,32 +173,12 @@ is_xfb_marker(const char *str)
>      return false;
>   }
>   
> -/**
> - * Checks if given name index is legal for GetProgramResourceIndex,
> - * check is written to be compatible with GL_ARB_array_of_arrays.
> - */
> -static bool
> -valid_program_resource_index_name(const GLchar *name)
> -{
> -   const char *array = strstr(name, "[");
> -   const char *close = strrchr(name, ']');
> -
> -   /* Not array, no need for the check. */
> -   if (!array)
> -      return true;
> -
> -   /* Last array index has to be zero. */
> -   if (!close || *--close != '0')
> -      return false;
> -
> -   return true;
> -}
> -
>   GLuint GLAPIENTRY
>   _mesa_GetProgramResourceIndex(GLuint program, GLenum programInterface,
>                                 const GLchar *name)
>   {
>      GET_CURRENT_CONTEXT(ctx);
> +   unsigned array_index;
>      struct gl_program_resource *res;
>      struct gl_shader_program *shProg =
>         _mesa_lookup_shader_program_err(ctx, program,
> @@ -221,12 +201,9 @@ _mesa_GetProgramResourceIndex(GLuint program, GLenum programInterface,
>      case GL_PROGRAM_OUTPUT:
>      case GL_UNIFORM:
>      case GL_TRANSFORM_FEEDBACK_VARYING:
> -      /* Validate name syntax for array variables */
> -      if (!valid_program_resource_index_name(name))
> -         return GL_INVALID_INDEX;
> -      /* fall-through */
>      case GL_UNIFORM_BLOCK:
> -      res = _mesa_program_resource_find_name(shProg, programInterface, name);
> +      res = _mesa_program_resource_find_name(shProg, programInterface, name,
> +                                             &array_index, true);
>         if (!res)
>            return GL_INVALID_INDEX;
>   
> @@ -300,36 +277,6 @@ _mesa_GetProgramResourceiv(GLuint program, GLenum programInterface,
>                                   propCount, props, bufSize, length, params);
>   }
>   
> -/**
> - * Function verifies syntax of given name for GetProgramResourceLocation
> - * and GetProgramResourceLocationIndex for the following cases:
> - *
> - * "array element portion of a string passed to GetProgramResourceLocation
> - * or GetProgramResourceLocationIndex must not have, a "+" sign, extra
> - * leading zeroes, or whitespace".
> - *
> - * Check is written to be compatible with GL_ARB_array_of_arrays.
> - */
> -static bool
> -invalid_array_element_syntax(const GLchar *name)
> -{
> -   char *first = strchr(name, '[');
> -   char *last = strrchr(name, '[');
> -
> -   if (!first)
> -      return false;
> -
> -   /* No '+' or ' ' allowed anywhere. */
> -   if (strchr(first, '+') || strchr(first, ' '))
> -      return true;
> -
> -   /* Check that last array index is 0. */
> -   if (last[1] == '0' && last[2] != ']')
> -      return true;
> -
> -   return false;
> -}
> -
>   static struct gl_shader_program *
>   lookup_linked_program(GLuint program, const char *caller)
>   {
> @@ -356,7 +303,7 @@ _mesa_GetProgramResourceLocation(GLuint program, GLenum programInterface,
>      struct gl_shader_program *shProg =
>         lookup_linked_program(program, "glGetProgramResourceLocation");
>   
> -   if (!shProg || !name || invalid_array_element_syntax(name))
> +   if (!shProg || !name)
>         return -1;
>   
>      /* Validate programInterface. */
> @@ -383,7 +330,8 @@ _mesa_GetProgramResourceLocation(GLuint program, GLenum programInterface,
>                     _mesa_lookup_enum_by_nr(programInterface), name);
>      }
>   
> -   return _mesa_program_resource_location(shProg, programInterface, name);
> +   return _mesa_program_resource_location(shProg, programInterface, name,
> +                                          true);
>   }
>   
>   /**
> @@ -397,7 +345,7 @@ _mesa_GetProgramResourceLocationIndex(GLuint program, GLenum programInterface,
>      struct gl_shader_program *shProg =
>         lookup_linked_program(program, "glGetProgramResourceLocationIndex");
>   
> -   if (!shProg || !name || invalid_array_element_syntax(name))
> +   if (!shProg || !name)
>         return -1;
>   
>      /* From the GL_ARB_program_interface_query spec:
> diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp
> index a6246a3..46901cc 100644
> --- a/src/mesa/main/shader_query.cpp
> +++ b/src/mesa/main/shader_query.cpp
> @@ -44,7 +44,8 @@ extern "C" {
>   
>   static GLint
>   program_resource_location(struct gl_shader_program *shProg,
> -                          struct gl_program_resource *res, const char *name);
> +                          struct gl_program_resource *res, const char *name,
> +                          unsigned array_index);
>   
>   /**
>    * Declare convenience functions to return resource data in a given type.
> @@ -189,63 +190,6 @@ _mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index,
>                                     (GLint *) type, "glGetActiveAttrib");
>   }
>   
> -/* Locations associated with shader variables (array or non-array) can be
> - * queried using its base name or using the base name appended with the
> - * valid array index. For example, in case of below vertex shader, valid
> - * queries can be made to know the location of "xyz", "array", "array[0]",
> - * "array[1]", "array[2]" and "array[3]". In this example index reurned
> - * will be 0, 0, 0, 1, 2, 3 respectively.
> - *
> - * [Vertex Shader]
> - * layout(location=0) in vec4 xyz;
> - * layout(location=1) in vec4[4] array;
> - * void main()
> - * { }
> - *
> - * This requirement came up with the addition of ARB_program_interface_query
> - * to OpenGL 4.3 specification. See page 101 (page 122 of the PDF) for details.
> - *
> - * This utility function is used by:
> - * _mesa_GetAttribLocation
> - * _mesa_GetFragDataLocation
> - * _mesa_GetFragDataIndex
> - *
> - * Returns 0:
> - *    if the 'name' string matches var->name.
> - * Returns 'matched index':
> - *    if the 'name' string matches var->name appended with valid array index.
> - */
> -int static inline
> -get_matching_index(const ir_variable *const var, const char *name) {
> -   unsigned idx = 0;
> -   const char *const paren = strchr(name, '[');
> -   const unsigned len = (paren != NULL) ? paren - name : strlen(name);
> -
> -   if (paren != NULL) {
> -      if (!var->type->is_array())
> -         return -1;
> -
> -      char *endptr;
> -      idx = (unsigned) strtol(paren + 1, &endptr, 10);
> -      const unsigned idx_len = endptr != (paren + 1) ? endptr - paren - 1 : 0;
> -
> -      /* Validate the sub string representing index in 'name' string */
> -      if ((idx > 0 && paren[1] == '0') /* leading zeroes */
> -          || (idx == 0 && idx_len > 1) /* all zeroes */
> -          || paren[1] == ' ' /* whitespace */
> -          || endptr[0] != ']' /* closing brace */
> -          || endptr[1] != '\0' /* null char */
> -          || idx_len == 0 /* missing index */
> -          || idx >= var->type->length) /* exceeding array bound */
> -         return -1;
> -   }
> -
> -   if (strncmp(var->name, name, len) == 0 && var->name[len] == '\0')
> -      return idx;
> -
> -   return -1;
> -}
> -
>   GLint GLAPIENTRY
>   _mesa_GetAttribLocation(GLhandleARB program, const GLcharARB * name)
>   {
> @@ -271,13 +215,15 @@ _mesa_GetAttribLocation(GLhandleARB program, const GLcharARB * name)
>      if (shProg->_LinkedShaders[MESA_SHADER_VERTEX] == NULL)
>         return -1;
>   
> +   unsigned array_index = 0;
>      struct gl_program_resource *res =
> -      _mesa_program_resource_find_name(shProg, GL_PROGRAM_INPUT, name);
> +      _mesa_program_resource_find_name(shProg, GL_PROGRAM_INPUT, name,
> +                                       &array_index, false);
>   
>      if (!res)
>         return -1;
>   
> -   GLint loc = program_resource_location(shProg, res, name);
> +   GLint loc = program_resource_location(shProg, res, name, array_index);
>   
>      /* The extra check against against 0 is made because of builtin-attribute
>       * locations that have offset applied. Function program_resource_location
> @@ -455,13 +401,15 @@ _mesa_GetFragDataLocation(GLuint program, const GLchar *name)
>      if (shProg->_LinkedShaders[MESA_SHADER_FRAGMENT] == NULL)
>         return -1;
>   
> +   unsigned array_index = 0;
>      struct gl_program_resource *res =
> -      _mesa_program_resource_find_name(shProg, GL_PROGRAM_OUTPUT, name);
> +      _mesa_program_resource_find_name(shProg, GL_PROGRAM_OUTPUT, name,
> +                                       &array_index, false);
>   
>      if (!res)
>         return -1;
>   
> -   GLint loc = program_resource_location(shProg, res, name);
> +   GLint loc = program_resource_location(shProg, res, name, array_index);
>   
>      /* The extra check against against 0 is made because of builtin-attribute
>       * locations that have offset applied. Function program_resource_location
> @@ -525,39 +473,32 @@ _mesa_program_resource_array_size(struct gl_program_resource *res)
>      return 0;
>   }
>   
> -static int
> -array_index_of_resource(struct gl_program_resource *res,
> -                        const char *name)
> +/**
> + * Checks if array subscript is valid and if so sets array_index.
> + */
> +static bool
> +valid_array_index(const GLchar *name, unsigned *array_index)
>   {
> -   assert(res->Data);
> +   unsigned idx = 0;
> +   const GLchar *out_base_name_end;
>   
> -   switch (res->Type) {
> -   case GL_PROGRAM_INPUT:
> -   case GL_PROGRAM_OUTPUT:
> -      return get_matching_index(RESOURCE_VAR(res), name);
> -   default:
> -      assert(!"support for resource type not implemented");
> -      return -1;
> -   }
> +   idx = parse_program_resource_name(name, &out_base_name_end);
> +   if (idx < 0)
> +      return false;
> +
> +   if (array_index)
> +      *array_index = idx;
> +
> +   return true;
>   }
>   
>   /* Find a program resource with specific name in given interface.
>    */
>   struct gl_program_resource *
>   _mesa_program_resource_find_name(struct gl_shader_program *shProg,
> -                                 GLenum programInterface, const char *name)
> +                                 GLenum programInterface, const char *name,
> +                                 unsigned *array_index, bool is_program_query)
>   {
> -   GET_CURRENT_CONTEXT(ctx);
> -   const char *full_name = name;
> -
> -   /* When context has 'VertexID_is_zero_based' set, gl_VertexID has been
> -    * lowered to gl_VertexIDMESA.
> -    */
> -   if (name && ctx->Const.VertexID_is_zero_based) {
> -      if (strcmp(name, "gl_VertexID") == 0)
> -         full_name = "gl_VertexIDMESA";
> -   }
> -
>      struct gl_program_resource *res = shProg->ProgramResourceList;
>      for (unsigned i = 0; i < shProg->NumProgramResourceList; i++, res++) {
>         if (res->Type != programInterface)
> @@ -567,26 +508,36 @@ _mesa_program_resource_find_name(struct gl_shader_program *shProg,
>         const char *rname = _mesa_program_resource_name(res);
>         unsigned baselen = strlen(rname);
>   
> -      switch (programInterface) {
> -      case GL_TRANSFORM_FEEDBACK_VARYING:
> -      case GL_UNIFORM_BLOCK:
> -      case GL_UNIFORM:
> -         if (strncmp(rname, name, baselen) == 0) {
> +      if (strncmp(rname, name, baselen) == 0) {
> +         switch (programInterface) {
> +         case GL_UNIFORM_BLOCK:
>               /* Basename match, check if array or struct. */
>               if (name[baselen] == '\0' ||
>                   name[baselen] == '[' ||
>                   name[baselen] == '.') {
>                  return res;
>               }
> +            break;
> +         case GL_TRANSFORM_FEEDBACK_VARYING:
> +         case GL_UNIFORM:
> +            if (name[baselen] == '.') {
> +               return res;
> +            }
> +            /* fall-through */
> +         case GL_PROGRAM_INPUT:
> +         case GL_PROGRAM_OUTPUT:
> +            if (name[baselen] == '\0') {
> +               return res;
> +            } else if (name[baselen] == '[' &&
> +                valid_array_index(name, array_index)) {
> +               if (is_program_query && *array_index > 0)
> +                  return NULL;
> +               return res;
> +            }
> +            break;
> +         default:
> +            assert(!"not implemented for given interface");
>            }
> -         break;
> -      case GL_PROGRAM_INPUT:
> -      case GL_PROGRAM_OUTPUT:
> -         if (array_index_of_resource(res, full_name) >= 0)
> -            return res;
> -         break;
> -      default:
> -         assert(!"not implemented for given interface");
>         }
>      }
>      return NULL;
> @@ -736,17 +687,9 @@ _mesa_get_program_resource_name(struct gl_shader_program *shProg,
>   
>   static GLint
>   program_resource_location(struct gl_shader_program *shProg,
> -                          struct gl_program_resource *res, const char *name)
> +                          struct gl_program_resource *res, const char *name,
> +                          unsigned array_index)
>   {
> -   unsigned index, offset;
> -   int array_index = -1;
> -
> -   if (res->Type == GL_PROGRAM_INPUT || res->Type == GL_PROGRAM_OUTPUT) {
> -      array_index = array_index_of_resource(res, name);
> -      if (array_index < 0)
> -         return -1;
> -   }
> -
>      /* Built-in locations should report GL_INVALID_INDEX. */
>      if (is_gl_identifier(name))
>         return GL_INVALID_INDEX;
> @@ -757,15 +700,29 @@ program_resource_location(struct gl_shader_program *shProg,
>       */
>      switch (res->Type) {
>      case GL_PROGRAM_INPUT:
> +      /* If the input is an array, fail if the index is out of bounds. */
> +      if (array_index > 0
> +          && array_index >= RESOURCE_UNI(res)->type->length) {

RESOURCE_VAR instead RESOURCE_UNI.

> +         return -1;
> +      }
>         return RESOURCE_VAR(res)->data.location + array_index - VERT_ATTRIB_GENERIC0;
>      case GL_PROGRAM_OUTPUT:
> +      /* If the output is an array, fail if the index is out of bounds. */
> +      if (array_index > 0
> +          && array_index >= RESOURCE_UNI(res)->type->length) {

RESOURCE_VAR instead RESOURCE_UNI.

> +         return -1;
> +      }
>         return RESOURCE_VAR(res)->data.location + array_index - FRAG_RESULT_DATA0;
>      case GL_UNIFORM:
> -      index = _mesa_get_uniform_location(shProg, name, &offset);
> -
> -      if (index == GL_INVALID_INDEX)
> +      /* If the uniform is built-in, fail. */
> +      if (RESOURCE_UNI(res)->builtin)
>            return -1;
>   
> +      /* If the uniform is an array, fail if the index is out of bounds. */
> +      if (array_index > 0
> +          && array_index >= RESOURCE_UNI(res)->array_elements) {
> +         return -1;
> +      }
>         /* From the GL_ARB_uniform_buffer_object spec:
>          *
>          *     "The value -1 will be returned if <name> does not correspond to an
> @@ -778,7 +735,7 @@ program_resource_location(struct gl_shader_program *shProg,
>            return -1;
>   
>         /* location in remap table + array element offset */
> -      return RESOURCE_UNI(res)->remap_location + offset;
> +      return RESOURCE_UNI(res)->remap_location + array_index;
>   
>      default:
>         return -1;
> @@ -787,22 +744,23 @@ program_resource_location(struct gl_shader_program *shProg,
>   
>   /**
>    * Function implements following location queries:
> - *    glGetAttribLocation
> - *    glGetFragDataLocation
Move the comment to the right function implementing these.

I will read the patch in details later, but this is not my code so I 
feel like we should wait for tapani to be back from vacation. If 
necessary, I will review it but that will take me a lot of time and this 
is not something I have right now :)

>    *    glGetUniformLocation
>    */
>   GLint
>   _mesa_program_resource_location(struct gl_shader_program *shProg,
> -                                GLenum programInterface, const char *name)
> +                                GLenum programInterface, const char *name,
> +                                bool is_resource_query)
>   {
> +   unsigned array_index = 0;
>      struct gl_program_resource *res =
> -      _mesa_program_resource_find_name(shProg, programInterface, name);
> +      _mesa_program_resource_find_name(shProg, programInterface, name,
> +                                       &array_index, false);
>   
>      /* Resource not found. */
>      if (!res)
>         return -1;
>   
> -   return program_resource_location(shProg, res, name);
> +   return program_resource_location(shProg, res, name, array_index);
>   }
>   
>   /**
> @@ -814,7 +772,8 @@ _mesa_program_resource_location_index(struct gl_shader_program *shProg,
>                                         GLenum programInterface, const char *name)
>   {
>      struct gl_program_resource *res =
> -      _mesa_program_resource_find_name(shProg, programInterface, name);
> +      _mesa_program_resource_find_name(shProg, programInterface, name,
> +                                       NULL, false);
>   
>      /* Non-existent variable or resource is not referenced by fragment stage. */
>      if (!res || !(res->StageReferences & (1 << MESA_SHADER_FRAGMENT)))
> @@ -886,7 +845,8 @@ get_buffer_property(struct gl_shader_program *shProg,
>            for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
>               const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
>               struct gl_program_resource *uni =
> -               _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname);
> +               _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname,
> +                                                NULL, false);
>               if (!uni)
>                  continue;
>               (*val)++;
> @@ -896,7 +856,8 @@ get_buffer_property(struct gl_shader_program *shProg,
>            for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
>               const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
>               struct gl_program_resource *uni =
> -               _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname);
> +               _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname,
> +                                                NULL, false);
>               if (!uni)
>                  continue;
>               *val++ =
> @@ -1034,7 +995,8 @@ _mesa_program_resource_prop(struct gl_shader_program *shProg,
>         case GL_PROGRAM_INPUT:
>         case GL_PROGRAM_OUTPUT:
>            *val = program_resource_location(shProg, res,
> -                                          _mesa_program_resource_name(res));
> +                                          _mesa_program_resource_name(res),
> +                                          0);
>            return 1;
>         default:
>            goto invalid_operation;
> diff --git a/src/mesa/main/shaderapi.h b/src/mesa/main/shaderapi.h
> index aba6d5d..186b10d 100644
> --- a/src/mesa/main/shaderapi.h
> +++ b/src/mesa/main/shaderapi.h
> @@ -232,7 +232,9 @@ _mesa_program_resource_index(struct gl_shader_program *shProg,
>   
>   extern struct gl_program_resource *
>   _mesa_program_resource_find_name(struct gl_shader_program *shProg,
> -                                 GLenum programInterface, const char *name);
> +                                 GLenum programInterface, const char *name,
> +                                 unsigned *array_index,
> +                                 bool is_resource_query);
>   
>   extern struct gl_program_resource *
>   _mesa_program_resource_find_index(struct gl_shader_program *shProg,
> @@ -246,7 +248,8 @@ _mesa_get_program_resource_name(struct gl_shader_program *shProg,
>   
>   extern GLint
>   _mesa_program_resource_location(struct gl_shader_program *shProg,
> -                                GLenum programInterface, const char *name);
> +                                GLenum programInterface, const char *name,
> +                                bool is_resource_query);
>   
>   extern GLint
>   _mesa_program_resource_location_index(struct gl_shader_program *shProg,
> diff --git a/src/mesa/main/uniform_query.cpp b/src/mesa/main/uniform_query.cpp
> index cab5083..680ba16 100644
> --- a/src/mesa/main/uniform_query.cpp
> +++ b/src/mesa/main/uniform_query.cpp
> @@ -978,81 +978,6 @@ _mesa_uniform_matrix(struct gl_context *ctx, struct gl_shader_program *shProg,
>   }
>   
>   
> -/**
> - * Called via glGetUniformLocation().
> - *
> - * Returns the uniform index into UniformStorage (also the
> - * glGetActiveUniformsiv uniform index), and stores the referenced
> - * array offset in *offset, or GL_INVALID_INDEX (-1).
> - */
> -extern "C" unsigned
> -_mesa_get_uniform_location(struct gl_shader_program *shProg,
> -                           const GLchar *name,
> -                           unsigned *out_offset)
> -{
> -   /* Page 80 (page 94 of the PDF) of the OpenGL 2.1 spec says:
> -    *
> -    *     "The first element of a uniform array is identified using the
> -    *     name of the uniform array appended with "[0]". Except if the last
> -    *     part of the string name indicates a uniform array, then the
> -    *     location of the first element of that array can be retrieved by
> -    *     either using the name of the uniform array, or the name of the
> -    *     uniform array appended with "[0]"."
> -    *
> -    * Note: since uniform names are not allowed to use whitespace, and array
> -    * indices within uniform names are not allowed to use "+", "-", or leading
> -    * zeros, it follows that each uniform has a unique name up to the possible
> -    * ambiguity with "[0]" noted above.  Therefore we don't need to worry
> -    * about mal-formed inputs--they will properly fail when we try to look up
> -    * the uniform name in shProg->UniformHash.
> -    */
> -
> -   const GLchar *base_name_end;
> -   long offset = parse_program_resource_name(name, &base_name_end);
> -   bool array_lookup = offset >= 0;
> -   char *name_copy;
> -
> -   if (array_lookup) {
> -      name_copy = (char *) malloc(base_name_end - name + 1);
> -      memcpy(name_copy, name, base_name_end - name);
> -      name_copy[base_name_end - name] = '\0';
> -   } else {
> -      name_copy = (char *) name;
> -      offset = 0;
> -   }
> -
> -   unsigned location = 0;
> -   const bool found = shProg->UniformHash->get(location, name_copy);
> -
> -   assert(!found
> -	  || strcmp(name_copy, shProg->UniformStorage[location].name) == 0);
> -
> -   /* Free the temporary buffer *before* possibly returning an error.
> -    */
> -   if (name_copy != name)
> -      free(name_copy);
> -
> -   if (!found)
> -      return GL_INVALID_INDEX;
> -
> -   /* If the uniform is built-in, fail. */
> -   if (shProg->UniformStorage[location].builtin)
> -      return GL_INVALID_INDEX;
> -
> -   /* If the uniform is an array, fail if the index is out of bounds.
> -    * (A negative index is caught above.)  This also fails if the uniform
> -    * is not an array, but the user is trying to index it, because
> -    * array_elements is zero and offset >= 0.
> -    */
> -   if (array_lookup
> -       && offset >= (long) shProg->UniformStorage[location].array_elements) {
> -      return GL_INVALID_INDEX;
> -   }
> -
> -   *out_offset = offset;
> -   return location;
> -}
> -
>   extern "C" bool
>   _mesa_sampler_uniforms_are_valid(const struct gl_shader_program *shProg,
>   				 char *errMsg, size_t errMsgLength)
> diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
> index 5548d1d..7c9ff7e 100644
> --- a/src/mesa/main/uniforms.c
> +++ b/src/mesa/main/uniforms.c
> @@ -930,7 +930,7 @@ _mesa_GetUniformLocation(GLuint programObj, const GLcharARB *name)
>         return -1;
>      }
>   
> -   return _mesa_program_resource_location(shProg, GL_UNIFORM, name);
> +   return _mesa_program_resource_location(shProg, GL_UNIFORM, name, false);
>   }
>   
>   GLuint GLAPIENTRY
> @@ -952,7 +952,7 @@ _mesa_GetUniformBlockIndex(GLuint program,
>   
>      struct gl_program_resource *res =
>         _mesa_program_resource_find_name(shProg, GL_UNIFORM_BLOCK,
> -                                       uniformBlockName);
> +                                       uniformBlockName, NULL, false);
>      if (!res)
>         return GL_INVALID_INDEX;
>   
> @@ -987,7 +987,8 @@ _mesa_GetUniformIndices(GLuint program,
>   
>      for (i = 0; i < uniformCount; i++) {
>         struct gl_program_resource *res =
> -         _mesa_program_resource_find_name(shProg, GL_UNIFORM, uniformNames[i]);
> +         _mesa_program_resource_find_name(shProg, GL_UNIFORM, uniformNames[i],
> +                                          NULL, false);
>         uniformIndices[i] = _mesa_program_resource_index(shProg, res);
>      }
>   }
> diff --git a/src/mesa/main/uniforms.h b/src/mesa/main/uniforms.h
> index bd7b05e..e62eaa5 100644
> --- a/src/mesa/main/uniforms.h
> +++ b/src/mesa/main/uniforms.h
> @@ -343,10 +343,6 @@ void GLAPIENTRY
>   _mesa_ProgramUniformMatrix4x3dv(GLuint program, GLint location, GLsizei count,
>                                   GLboolean transpose, const GLdouble *value);
>   
> -unsigned
> -_mesa_get_uniform_location(struct gl_shader_program *shProg,
> -			   const GLchar *name, unsigned *offset);
> -
>   void
>   _mesa_uniform(struct gl_context *ctx, struct gl_shader_program *shader_program,
>   	      GLint location, GLsizei count,



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