glsl: remove specical case subroutine type counting
[mesa.git] / src / glsl / link_uniforms.cpp
index 347f079fa42ba505b5f061027f9a5e041879ff92..a0cb618292517b4b63a0896f2c3e55f1c62afc6b 100644 (file)
@@ -274,7 +274,7 @@ namespace {
  *
  * As uniforms are added to the active set the number of active uniforms and
  * the storage requirements for those uniforms are accumulated.  The active
- * uniforms are added the the hash table supplied to the constructor.
+ * uniforms are added to the hash table supplied to the constructor.
  *
  * If the same uniform is added multiple times (i.e., once for each shader
  * target), it will only be accounted once.
@@ -284,6 +284,7 @@ public:
    count_uniform_size(struct string_to_uint_map *map)
       : num_active_uniforms(0), num_values(0), num_shader_samplers(0),
         num_shader_images(0), num_shader_uniform_components(0),
+        num_shader_subroutines(0),
         is_ubo_var(false), map(map)
    {
       /* empty */
@@ -294,11 +295,12 @@ public:
       this->num_shader_samplers = 0;
       this->num_shader_images = 0;
       this->num_shader_uniform_components = 0;
+      this->num_shader_subroutines = 0;
    }
 
    void process(ir_variable *var)
    {
-      this->is_ubo_var = var->is_in_uniform_block();
+      this->is_ubo_var = var->is_in_buffer_block();
       if (var->is_interface_instance())
          program_resource_visitor::process(var->get_interface_type(),
                                            var->get_interface_type()->name);
@@ -331,6 +333,11 @@ public:
     */
    unsigned num_shader_uniform_components;
 
+   /**
+    * Number of subroutine uniforms used
+    */
+   unsigned num_shader_subroutines;
+
    bool is_ubo_var;
 
 private:
@@ -348,7 +355,9 @@ private:
        * count it for each shader target.
        */
       const unsigned values = values_for_type(type);
-      if (type->contains_sampler()) {
+      if (type->contains_subroutine()) {
+         this->num_shader_subroutines += values;
+      } else if (type->contains_sampler()) {
          this->num_shader_samplers += values;
       } else if (type->contains_image()) {
          this->num_shader_images += values;
@@ -421,6 +430,7 @@ public:
       this->shader_shadow_samplers = 0;
       this->next_sampler = 0;
       this->next_image = 0;
+      this->next_subroutine = 0;
       memset(this->targets, 0, sizeof(this->targets));
    }
 
@@ -431,7 +441,7 @@ public:
       field_counter = 0;
 
       ubo_block_index = -1;
-      if (var->is_in_uniform_block()) {
+      if (var->is_in_buffer_block()) {
          if (var->is_interface_instance() && var->type->is_array()) {
             unsigned l = strlen(var->get_interface_type()->name);
 
@@ -535,6 +545,24 @@ private:
       }
    }
 
+   void handle_subroutines(const glsl_type *base_type,
+                           struct gl_uniform_storage *uniform)
+   {
+      if (base_type->is_subroutine()) {
+         uniform->subroutine[shader_type].index = this->next_subroutine;
+         uniform->subroutine[shader_type].active = true;
+
+         /* Increment the subroutine index by 1 for non-arrays and by the
+          * number of array elements for arrays.
+          */
+         this->next_subroutine += MAX2(1, uniform->array_elements);
+
+      } else {
+         uniform->subroutine[shader_type].index = ~0;
+         uniform->subroutine[shader_type].active = false;
+      }
+   }
+
    virtual void visit_field(const glsl_type *type, const char *name,
                             bool row_major)
    {
@@ -544,21 +572,27 @@ private:
       assert(!"Should not get here.");
    }
 
-   virtual void enter_record(const glsl_type *type, const char *name,
+   virtual void enter_record(const glsl_type *type, const char *,
                              bool row_major) {
+      assert(type->is_record());
+      if (this->ubo_block_index == -1)
+         return;
       this->ubo_byte_offset = glsl_align(
             this->ubo_byte_offset, type->std140_base_alignment(row_major));
    }
 
-   virtual void leave_record(const glsl_type *type, const char *name,
+   virtual void leave_record(const glsl_type *type, const char *,
                              bool row_major) {
+      assert(type->is_record());
+      if (this->ubo_block_index == -1)
+         return;
       this->ubo_byte_offset = glsl_align(
             this->ubo_byte_offset, type->std140_base_alignment(row_major));
    }
 
    virtual void visit_field(const glsl_type *type, const char *name,
                             bool row_major, const glsl_type *record_type,
-                            bool last_field)
+                            bool /* last_field */)
    {
       assert(!type->without_array()->is_record());
       assert(!type->without_array()->is_interface());
@@ -582,13 +616,15 @@ private:
       /* This assigns uniform indices to sampler and image uniforms. */
       handle_samplers(base_type, &this->uniforms[id]);
       handle_images(base_type, &this->uniforms[id]);
+      handle_subroutines(base_type, &this->uniforms[id]);
 
-      /* If there is already storage associated with this uniform, it means
-       * that it was set while processing an earlier shader stage.  For
-       * example, we may be processing the uniform in the fragment shader, but
-       * the uniform was already processed in the vertex shader.
+      /* If there is already storage associated with this uniform or if the
+       * uniform is set as builtin, it means that it was set while processing
+       * an earlier shader stage.  For example, we may be processing the
+       * uniform in the fragment shader, but the uniform was already processed
+       * in the vertex shader.
        */
-      if (this->uniforms[id].storage != NULL) {
+      if (this->uniforms[id].storage != NULL || this->uniforms[id].builtin) {
          return;
       }
 
@@ -613,10 +649,15 @@ private:
       this->uniforms[id].initialized = 0;
       this->uniforms[id].num_driver_storage = 0;
       this->uniforms[id].driver_storage = NULL;
-      this->uniforms[id].storage = this->values;
       this->uniforms[id].atomic_buffer_index = -1;
       this->uniforms[id].hidden =
          current_var->data.how_declared == ir_var_hidden;
+      this->uniforms[id].builtin = is_gl_identifier(name);
+
+      /* Do not assign storage if the uniform is builtin */
+      if (!this->uniforms[id].builtin)
+         this->uniforms[id].storage = this->values;
+
       if (this->ubo_block_index != -1) {
         this->uniforms[id].block_index = this->ubo_block_index;
 
@@ -660,6 +701,7 @@ private:
    struct gl_uniform_storage *uniforms;
    unsigned next_sampler;
    unsigned next_image;
+   unsigned next_subroutine;
 
 public:
    union gl_constant_value *values;
@@ -751,10 +793,11 @@ link_update_uniform_buffer_variables(struct gl_shader *shader)
    foreach_in_list(ir_instruction, node, shader->ir) {
       ir_variable *const var = node->as_variable();
 
-      if ((var == NULL) || !var->is_in_uniform_block())
+      if ((var == NULL) || !var->is_in_buffer_block())
         continue;
 
-      assert(var->data.mode == ir_var_uniform);
+      assert(var->data.mode == ir_var_uniform ||
+             var->data.mode == ir_var_shader_storage);
 
       if (var->is_interface_instance()) {
          var->data.location = 0;
@@ -888,7 +931,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
 {
    ralloc_free(prog->UniformStorage);
    prog->UniformStorage = NULL;
-   prog->NumUserUniformStorage = 0;
+   prog->NumUniformStorage = 0;
 
    if (prog->UniformHash != NULL) {
       prog->UniformHash->clear();
@@ -931,41 +974,34 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
       foreach_in_list(ir_instruction, node, sh->ir) {
         ir_variable *const var = node->as_variable();
 
-        if ((var == NULL) || (var->data.mode != ir_var_uniform))
+        if ((var == NULL) || (var->data.mode != ir_var_uniform &&
+                              var->data.mode != ir_var_shader_storage))
            continue;
 
-        /* FINISHME: Update code to process built-in uniforms!
-         */
-        if (is_gl_identifier(var->name)) {
-           uniform_size.num_shader_uniform_components +=
-              var->type->component_slots();
-           continue;
-        }
-
         uniform_size.process(var);
       }
 
       sh->num_samplers = uniform_size.num_shader_samplers;
       sh->NumImages = uniform_size.num_shader_images;
       sh->num_uniform_components = uniform_size.num_shader_uniform_components;
-
       sh->num_combined_uniform_components = sh->num_uniform_components;
+
       for (unsigned i = 0; i < sh->NumUniformBlocks; i++) {
         sh->num_combined_uniform_components +=
            sh->UniformBlocks[i].UniformBufferSize / 4;
       }
    }
 
-   const unsigned num_user_uniforms = uniform_size.num_active_uniforms;
+   const unsigned num_uniforms = uniform_size.num_active_uniforms;
    const unsigned num_data_slots = uniform_size.num_values;
 
    /* On the outside chance that there were no uniforms, bail out.
     */
-   if (num_user_uniforms == 0)
+   if (num_uniforms == 0)
       return;
 
    struct gl_uniform_storage *uniforms =
-      rzalloc_array(prog, struct gl_uniform_storage, num_user_uniforms);
+      rzalloc_array(prog, struct gl_uniform_storage, num_uniforms);
    union gl_constant_value *data =
       rzalloc_array(uniforms, union gl_constant_value, num_data_slots);
 #ifndef NDEBUG
@@ -983,12 +1019,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
       foreach_in_list(ir_instruction, node, prog->_LinkedShaders[i]->ir) {
         ir_variable *const var = node->as_variable();
 
-        if ((var == NULL) || (var->data.mode != ir_var_uniform))
-           continue;
-
-        /* FINISHME: Update code to process built-in uniforms!
-         */
-        if (is_gl_identifier(var->name))
+        if ((var == NULL) || (var->data.mode != ir_var_uniform && var->data.mode != ir_var_shader_storage))
            continue;
 
         parcel.set_and_process(prog, var);
@@ -1003,10 +1034,13 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
    }
 
    const unsigned hidden_uniforms =
-      move_hidden_uniforms_to_end(prog, uniforms, num_user_uniforms);
+      move_hidden_uniforms_to_end(prog, uniforms, num_uniforms);
 
    /* Reserve all the explicit locations of the active uniforms. */
-   for (unsigned i = 0; i < num_user_uniforms; i++) {
+   for (unsigned i = 0; i < num_uniforms; i++) {
+      if (uniforms[i].type->is_subroutine())
+         continue;
+
       if (uniforms[i].remap_location != UNMAPPED_UNIFORM_LOC) {
          /* How many new entries for this uniform? */
          const unsigned entries = MAX2(1, uniforms[i].array_elements);
@@ -1022,7 +1056,13 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
    }
 
    /* Reserve locations for rest of the uniforms. */
-   for (unsigned i = 0; i < num_user_uniforms; i++) {
+   for (unsigned i = 0; i < num_uniforms; i++) {
+
+      if (uniforms[i].type->is_subroutine())
+         continue;
+      /* Built-in uniforms should not get any location. */
+      if (uniforms[i].builtin)
+         continue;
 
       /* Explicit ones have been set already. */
       if (uniforms[i].remap_location != UNMAPPED_UNIFORM_LOC)
@@ -1048,15 +1088,74 @@ link_assign_uniform_locations(struct gl_shader_program *prog,
       prog->NumUniformRemapTable += entries;
    }
 
+   /* Reserve all the explicit locations of the active subroutine uniforms. */
+   for (unsigned i = 0; i < num_uniforms; i++) {
+      if (!uniforms[i].type->is_subroutine())
+         continue;
+
+      if (uniforms[i].remap_location == UNMAPPED_UNIFORM_LOC)
+         continue;
+
+      for (unsigned j = 0; j < MESA_SHADER_STAGES; j++) {
+         struct gl_shader *sh = prog->_LinkedShaders[j];
+         if (!sh)
+            continue;
+
+         if (!uniforms[i].subroutine[j].active)
+            continue;
+
+         /* How many new entries for this uniform? */
+         const unsigned entries = MAX2(1, uniforms[i].array_elements);
+
+         /* Set remap table entries point to correct gl_uniform_storage. */
+         for (unsigned k = 0; k < entries; k++) {
+            unsigned element_loc = uniforms[i].remap_location + k;
+            assert(sh->SubroutineUniformRemapTable[element_loc] ==
+                   INACTIVE_UNIFORM_EXPLICIT_LOCATION);
+            sh->SubroutineUniformRemapTable[element_loc] = &uniforms[i];
+         }
+      }
+   }
+
+   /* reserve subroutine locations */
+   for (unsigned i = 0; i < num_uniforms; i++) {
+
+      if (!uniforms[i].type->is_subroutine())
+         continue;
+      const unsigned entries = MAX2(1, uniforms[i].array_elements);
+
+      if (uniforms[i].remap_location != UNMAPPED_UNIFORM_LOC)
+         continue;
+      for (unsigned j = 0; j < MESA_SHADER_STAGES; j++) {
+         struct gl_shader *sh = prog->_LinkedShaders[j];
+         if (!sh)
+            continue;
+
+         if (!uniforms[i].subroutine[j].active)
+            continue;
+
+         sh->SubroutineUniformRemapTable =
+            reralloc(sh,
+                     sh->SubroutineUniformRemapTable,
+                     gl_uniform_storage *,
+                     sh->NumSubroutineUniformRemapTable + entries);
+
+         for (unsigned k = 0; k < entries; k++)
+            sh->SubroutineUniformRemapTable[sh->NumSubroutineUniformRemapTable + k] = &uniforms[i];
+         uniforms[i].remap_location = sh->NumSubroutineUniformRemapTable;
+         sh->NumSubroutineUniformRemapTable += entries;
+      }
+   }
+
 #ifndef NDEBUG
-   for (unsigned i = 0; i < num_user_uniforms; i++) {
-      assert(uniforms[i].storage != NULL);
+   for (unsigned i = 0; i < num_uniforms; i++) {
+      assert(uniforms[i].storage != NULL || uniforms[i].builtin);
    }
 
    assert(parcel.values == data_end);
 #endif
 
-   prog->NumUserUniformStorage = num_user_uniforms;
+   prog->NumUniformStorage = num_uniforms;
    prog->NumHiddenUniforms = hidden_uniforms;
    prog->UniformStorage = uniforms;