src/compiler/glsl/linker.h

   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright © 2010 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #ifndef GLSL_LINKER_H
  26 #define GLSL_LINKER_H
  27
  28 extern bool
  29 link_function_calls(gl_shader_program *prog, gl_linked_shader *main,
  30                     gl_shader **shader_list, unsigned num_shaders);
  31
  32 extern void
  33 link_invalidate_variable_locations(exec_list *ir);
  34
  35 extern void
  36 link_assign_uniform_locations(struct gl_shader_program *prog,
  37                               struct gl_context *ctx);
  38
  39 extern void
  40 link_set_uniform_initializers(struct gl_shader_program *prog,
  41                               unsigned int boolean_true);
  42
  43 extern int
  44 link_cross_validate_uniform_block(void *mem_ctx,
  45                                   struct gl_uniform_block **linked_blocks,
  46                                   unsigned int *num_linked_blocks,
  47                                   struct gl_uniform_block *new_block);
  48
  49 extern void
  50 link_uniform_blocks(void *mem_ctx,
  51                     struct gl_context *ctx,
  52                     struct gl_shader_program *prog,
  53                     struct gl_linked_shader *shader,
  54                     struct gl_uniform_block **ubo_blocks,
  55                     unsigned *num_ubo_blocks,
  56                     struct gl_uniform_block **ssbo_blocks,
  57                     unsigned *num_ssbo_blocks);
  58
  59 bool
  60 validate_intrastage_arrays(struct gl_shader_program *prog,
  61                            ir_variable *const var,
  62                            ir_variable *const existing);
  63
  64 void
  65 validate_intrastage_interface_blocks(struct gl_shader_program *prog,
  66                                      const gl_shader **shader_list,
  67                                      unsigned num_shaders);
  68
  69 void
  70 validate_interstage_inout_blocks(struct gl_shader_program *prog,
  71                                  const gl_linked_shader *producer,
  72                                  const gl_linked_shader *consumer);
  73
  74 void
  75 validate_interstage_uniform_blocks(struct gl_shader_program *prog,
  76                                    gl_linked_shader **stages);
  77
  78 unsigned
  79 values_for_type(const glsl_type *type);
  80
  81 extern void
  82 link_assign_atomic_counter_resources(struct gl_context *ctx,
  83                                      struct gl_shader_program *prog);
  84
  85 extern void
  86 link_check_atomic_counter_resources(struct gl_context *ctx,
  87                                     struct gl_shader_program *prog);
  88
  89
  90 extern struct gl_linked_shader *
  91 link_intrastage_shaders(void *mem_ctx,
  92                         struct gl_context *ctx,
  93                         struct gl_shader_program *prog,
  94                         struct gl_shader **shader_list,
  95                         unsigned num_shaders,
  96                         bool allow_missing_main);
  97
  98 /**
  99  * Class for processing all of the leaf fields of a variable that corresponds
 100  * to a program resource.
 101  *
 102  * The leaf fields are all the parts of the variable that the application
 103  * could query using \c glGetProgramResourceIndex (or that could be returned
 104  * by \c glGetProgramResourceName).
 105  *
 106  * Classes my derive from this class to implement specific functionality.
 107  * This class only provides the mechanism to iterate over the leaves.  Derived
 108  * classes must implement \c ::visit_field and may override \c ::process.
 109  */
 110 class program_resource_visitor {
 111 public:
 112    /**
 113     * Begin processing a variable
 114     *
 115     * Classes that overload this function should call \c ::process from the
 116     * base class to start the recursive processing of the variable.
 117     *
 118     * \param var  The variable that is to be processed
 119     *
 120     * Calls \c ::visit_field for each leaf of the variable.
 121     *
 122     * \warning
 123     * When processing a uniform block, this entry should only be used in cases
 124     * where the row / column ordering of matrices in the block does not
 125     * matter.  For example, enumerating the names of members of the block, but
 126     * not for determining the offsets of members.
 127     */
 128    void process(ir_variable *var);
 129
 130    /**
 131     * Begin processing a variable of a structured type.
 132     *
 133     * This flavor of \c process should be used to handle structured types
 134     * (i.e., structures, interfaces, or arrays there of) that need special
 135     * name handling.  A common usage is to handle cases where the block name
 136     * (instead of the instance name) is used for an interface block.
 137     *
 138     * \param type  Type that is to be processed, associated with \c name
 139     * \param name  Base name of the structured variable being processed
 140     *
 141     * \note
 142     * \c type must be \c GLSL_TYPE_RECORD, \c GLSL_TYPE_INTERFACE, or an array
 143     * there of.
 144     */
 145    void process(const glsl_type *type, const char *name);
 146
 147 protected:
 148    /**
 149     * Method invoked for each leaf of the variable
 150     *
 151     * \param type  Type of the field.
 152     * \param name  Fully qualified name of the field.
 153     * \param row_major  For a matrix type, is it stored row-major.
 154     * \param record_type  Type of the record containing the field.
 155     * \param last_field   Set if \c name is the last field of the structure
 156     *                     containing it.  This will always be false for items
 157     *                     not contained in a structure or interface block.
 158     */
 159    virtual void visit_field(const glsl_type *type, const char *name,
 160                             bool row_major, const glsl_type *record_type,
 161                             const enum glsl_interface_packing packing,
 162                             bool last_field) = 0;
 163
 164    /**
 165     * Visit a record before visiting its fields
 166     *
 167     * For structures-of-structures or interfaces-of-structures, this visits
 168     * the inner structure before visiting its fields.
 169     *
 170     * The default implementation does nothing.
 171     */
 172    virtual void visit_field(const glsl_struct_field *field);
 173
 174    virtual void enter_record(const glsl_type *type, const char *name,
 175                              bool row_major, const enum glsl_interface_packing packing);
 176
 177    virtual void leave_record(const glsl_type *type, const char *name,
 178                              bool row_major, const enum glsl_interface_packing packing);
 179
 180    virtual void set_buffer_offset(unsigned offset);
 181
 182    virtual void set_record_array_count(unsigned record_array_count);
 183
 184 private:
 185    /**
 186     * \param name_length  Length of the current name \b not including the
 187     *                     terminating \c NUL character.
 188     * \param last_field   Set if \c name is the last field of the structure
 189     *                     containing it.  This will always be false for items
 190     *                     not contained in a structure or interface block.
 191     */
 192    void recursion(const glsl_type *t, char **name, size_t name_length,
 193                   bool row_major, const glsl_type *record_type,
 194                   const enum glsl_interface_packing packing,
 195                   bool last_field, unsigned record_array_count,
 196                   const glsl_struct_field *named_ifc_member);
 197 };
 198
 199 void
 200 linker_error(gl_shader_program *prog, const char *fmt, ...);
 201
 202 void
 203 linker_warning(gl_shader_program *prog, const char *fmt, ...);
 204
 205 /**
 206  * Sometimes there are empty slots left over in UniformRemapTable after we
 207  * allocate slots to explicit locations. This struct represents a single
 208  * continouous block of empty slots in UniformRemapTable.
 209  */
 210 struct empty_uniform_block {
 211    struct exec_node link;
 212    /* The start location of the block */
 213    unsigned start;
 214    /* The number of slots in the block */
 215    unsigned slots;
 216 };
 217
 218 #endif /* GLSL_LINKER_H */