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 #pragma once
  26 #ifndef GLSL_LINKER_H
  27 #define GLSL_LINKER_H
  28
  29 extern bool
  30 link_function_calls(gl_shader_program *prog, gl_shader *main,
  31                     gl_shader **shader_list, unsigned num_shaders);
  32
  33 extern void
  34 link_invalidate_variable_locations(exec_list *ir);
  35
  36 extern void
  37 link_assign_uniform_locations(struct gl_shader_program *prog,
  38                               unsigned int boolean_true,
  39                               unsigned int num_explicit_uniform_locs,
  40                               unsigned int max_uniform_locs);
  41
  42 extern void
  43 link_set_uniform_initializers(struct gl_shader_program *prog,
  44                               unsigned int boolean_true);
  45
  46 extern int
  47 link_cross_validate_uniform_block(void *mem_ctx,
  48                                   struct gl_uniform_block **linked_blocks,
  49                                   unsigned int *num_linked_blocks,
  50                                   struct gl_uniform_block *new_block);
  51
  52 extern bool
  53 link_uniform_blocks_are_compatible(const gl_uniform_block *a,
  54                                    const gl_uniform_block *b);
  55
  56 extern unsigned
  57 link_uniform_blocks(void *mem_ctx,
  58                     struct gl_context *ctx,
  59                     struct gl_shader_program *prog,
  60                     struct gl_shader **shader_list,
  61                     unsigned num_shaders,
  62                     struct gl_uniform_block **blocks_ret);
  63
  64 bool
  65 validate_intrastage_arrays(struct gl_shader_program *prog,
  66                            ir_variable *const var,
  67                            ir_variable *const existing);
  68
  69 void
  70 validate_intrastage_interface_blocks(struct gl_shader_program *prog,
  71                                      const gl_shader **shader_list,
  72                                      unsigned num_shaders);
  73
  74 void
  75 validate_interstage_inout_blocks(struct gl_shader_program *prog,
  76                                  const gl_shader *producer,
  77                                  const gl_shader *consumer);
  78
  79 void
  80 validate_interstage_uniform_blocks(struct gl_shader_program *prog,
  81                                    gl_shader **stages, int num_stages);
  82
  83 extern void
  84 link_assign_atomic_counter_resources(struct gl_context *ctx,
  85                                      struct gl_shader_program *prog);
  86
  87 extern void
  88 link_check_atomic_counter_resources(struct gl_context *ctx,
  89                                     struct gl_shader_program *prog);
  90
  91 /**
  92  * Class for processing all of the leaf fields of a variable that corresponds
  93  * to a program resource.
  94  *
  95  * The leaf fields are all the parts of the variable that the application
  96  * could query using \c glGetProgramResourceIndex (or that could be returned
  97  * by \c glGetProgramResourceName).
  98  *
  99  * Classes my derive from this class to implement specific functionality.
 100  * This class only provides the mechanism to iterate over the leaves.  Derived
 101  * classes must implement \c ::visit_field and may override \c ::process.
 102  */
 103 class program_resource_visitor {
 104 public:
 105    /**
 106     * Begin processing a variable
 107     *
 108     * Classes that overload this function should call \c ::process from the
 109     * base class to start the recursive processing of the variable.
 110     *
 111     * \param var  The variable that is to be processed
 112     *
 113     * Calls \c ::visit_field for each leaf of the variable.
 114     *
 115     * \warning
 116     * When processing a uniform block, this entry should only be used in cases
 117     * where the row / column ordering of matrices in the block does not
 118     * matter.  For example, enumerating the names of members of the block, but
 119     * not for determining the offsets of members.
 120     */
 121    void process(ir_variable *var);
 122
 123    /**
 124     * Begin processing a variable of a structured type.
 125     *
 126     * This flavor of \c process should be used to handle structured types
 127     * (i.e., structures, interfaces, or arrays there of) that need special
 128     * name handling.  A common usage is to handle cases where the block name
 129     * (instead of the instance name) is used for an interface block.
 130     *
 131     * \param type  Type that is to be processed, associated with \c name
 132     * \param name  Base name of the structured variable being processed
 133     *
 134     * \note
 135     * \c type must be \c GLSL_TYPE_RECORD, \c GLSL_TYPE_INTERFACE, or an array
 136     * there of.
 137     */
 138    void process(const glsl_type *type, const char *name);
 139
 140 protected:
 141    /**
 142     * Method invoked for each leaf of the variable
 143     *
 144     * \param type  Type of the field.
 145     * \param name  Fully qualified name of the field.
 146     * \param row_major  For a matrix type, is it stored row-major.
 147     * \param record_type  Type of the record containing the field.
 148     * \param last_field   Set if \c name is the last field of the structure
 149     *                     containing it.  This will always be false for items
 150     *                     not contained in a structure or interface block.
 151     *
 152     * The default implementation just calls the other \c visit_field method.
 153     */
 154    virtual void visit_field(const glsl_type *type, const char *name,
 155                             bool row_major, const glsl_type *record_type,
 156                             const unsigned packing,
 157                             bool last_field);
 158
 159    /**
 160     * Method invoked for each leaf of the variable
 161     *
 162     * \param type  Type of the field.
 163     * \param name  Fully qualified name of the field.
 164     * \param row_major  For a matrix type, is it stored row-major.
 165     */
 166    virtual void visit_field(const glsl_type *type, const char *name,
 167                             bool row_major) = 0;
 168
 169    /**
 170     * Visit a record before visiting its fields
 171     *
 172     * For structures-of-structures or interfaces-of-structures, this visits
 173     * the inner structure before visiting its fields.
 174     *
 175     * The default implementation does nothing.
 176     */
 177    virtual void visit_field(const glsl_struct_field *field);
 178
 179    virtual void enter_record(const glsl_type *type, const char *name,
 180                              bool row_major, const unsigned packing);
 181
 182    virtual void leave_record(const glsl_type *type, const char *name,
 183                              bool row_major, const unsigned packing);
 184
 185    virtual void set_buffer_offset(unsigned offset);
 186
 187    virtual void set_record_array_count(unsigned record_array_count);
 188
 189 private:
 190    /**
 191     * \param name_length  Length of the current name \b not including the
 192     *                     terminating \c NUL character.
 193     * \param last_field   Set if \c name is the last field of the structure
 194     *                     containing it.  This will always be false for items
 195     *                     not contained in a structure or interface block.
 196     */
 197    void recursion(const glsl_type *t, char **name, size_t name_length,
 198                   bool row_major, const glsl_type *record_type,
 199                   const unsigned packing,
 200                   bool last_field, unsigned record_array_count);
 201 };
 202
 203 void
 204 linker_error(gl_shader_program *prog, const char *fmt, ...);
 205
 206 void
 207 linker_warning(gl_shader_program *prog, const char *fmt, ...);
 208
 209 /**
 210  * Sometimes there are empty slots left over in UniformRemapTable after we
 211  * allocate slots to explicit locations. This struct represents a single
 212  * continouous block of empty slots in UniformRemapTable.
 213  */
 214 struct empty_uniform_block {
 215    struct exec_node link;
 216    /* The start location of the block */
 217    unsigned start;
 218    /* The number of slots in the block */
 219    unsigned slots;
 220 };
 221
 222 #endif /* GLSL_LINKER_H */