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