src/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(gl_shader *sh, enum ir_variable_mode mode,
  35                                    int generic_base);
  36
  37 extern void
  38 link_assign_uniform_locations(struct gl_shader_program *prog);
  39
  40 extern void
  41 link_set_uniform_initializers(struct gl_shader_program *prog);
  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 void
  50 link_assign_uniform_block_offsets(struct gl_shader *shader);
  51
  52 extern bool
  53 link_uniform_blocks_are_compatible(const gl_uniform_block *a,
  54                                    const gl_uniform_block *b);
  55
  56 extern int
  57 link_uniform_blocks(void *mem_ctx,
  58                     struct gl_shader_program *prog,
  59                     struct gl_shader **shader_list,
  60                     unsigned num_shaders,
  61                     struct gl_uniform_block **blocks_ret);
  62
  63 bool
  64 validate_intrastage_interface_blocks(const gl_shader **shader_list,
  65                                      unsigned num_shaders);
  66
  67 bool
  68 validate_interstage_interface_blocks(const gl_shader *producer,
  69                                      const gl_shader *consumer);
  70
  71 /**
  72  * Class for processing all of the leaf fields of a variable that corresponds
  73  * to a program resource.
  74  *
  75  * The leaf fields are all the parts of the variable that the application
  76  * could query using \c glGetProgramResourceIndex (or that could be returned
  77  * by \c glGetProgramResourceName).
  78  *
  79  * Classes my derive from this class to implement specific functionality.
  80  * This class only provides the mechanism to iterate over the leaves.  Derived
  81  * classes must implement \c ::visit_field and may override \c ::process.
  82  */
  83 class program_resource_visitor {
  84 public:
  85    /**
  86     * Begin processing a variable
  87     *
  88     * Classes that overload this function should call \c ::process from the
  89     * base class to start the recursive processing of the variable.
  90     *
  91     * \param var  The variable that is to be processed
  92     *
  93     * Calls \c ::visit_field for each leaf of the variable.
  94     *
  95     * \warning
  96     * When processing a uniform block, this entry should only be used in cases
  97     * where the row / column ordering of matrices in the block does not
  98     * matter.  For example, enumerating the names of members of the block, but
  99     * not for determining the offsets of members.
 100     */
 101    void process(ir_variable *var);
 102
 103    /**
 104     * Begin processing a variable of a structured type.
 105     *
 106     * This flavor of \c process should be used to handle structured types
 107     * (i.e., structures, interfaces, or arrays there of) that need special
 108     * name handling.  A common usage is to handle cases where the block name
 109     * (instead of the instance name) is used for an interface block.
 110     *
 111     * \param type  Type that is to be processed, associated with \c name
 112     * \param name  Base name of the structured variable being processed
 113     *
 114     * \note
 115     * \c type must be \c GLSL_TYPE_RECORD, \c GLSL_TYPE_INTERFACE, or an array
 116     * there of.
 117     */
 118    void process(const glsl_type *type, const char *name);
 119
 120 protected:
 121    /**
 122     * Method invoked for each leaf of the variable
 123     *
 124     * \param type  Type of the field.
 125     * \param name  Fully qualified name of the field.
 126     * \param row_major  For a matrix type, is it stored row-major.
 127     */
 128    virtual void visit_field(const glsl_type *type, const char *name,
 129                             bool row_major) = 0;
 130
 131    /**
 132     * Visit a record before visiting its fields
 133     *
 134     * For structures-of-structures or interfaces-of-structures, this visits
 135     * the inner structure before visiting its fields.
 136     *
 137     * The default implementation does nothing.
 138     */
 139    virtual void visit_field(const glsl_struct_field *field);
 140
 141 private:
 142    /**
 143     * \param name_length  Length of the current name \b not including the
 144     *                     terminating \c NUL character.
 145     */
 146    void recursion(const glsl_type *t, char **name, size_t name_length,
 147                   bool row_major);
 148 };
 149
 150 void
 151 linker_error(gl_shader_program *prog, const char *fmt, ...);
 152
 153 void
 154 linker_warning(gl_shader_program *prog, const char *fmt, ...);
 155
 156 unsigned
 157 count_attribute_slots(const glsl_type *t);
 158
 159 #endif /* GLSL_LINKER_H */