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 /**
  57  * Class for processing all of the leaf fields of an uniform
  58  *
  59  * Leaves are, roughly speaking, the parts of the uniform that the application
  60  * could query with \c glGetUniformLocation (or that could be returned by
  61  * \c glGetActiveUniforms).
  62  *
  63  * Classes my derive from this class to implement specific functionality.
  64  * This class only provides the mechanism to iterate over the leaves.  Derived
  65  * classes must implement \c ::visit_field and may override \c ::process.
  66  */
  67 class uniform_field_visitor {
  68 public:
  69    /**
  70     * Begin processing a uniform
  71     *
  72     * Classes that overload this function should call \c ::process from the
  73     * base class to start the recursive processing of the uniform.
  74     *
  75     * \param var  The uniform variable that is to be processed
  76     *
  77     * Calls \c ::visit_field for each leaf of the uniform.
  78     *
  79     * \warning
  80     * This entry should only be used with uniform blocks in cases where the
  81     * row / column ordering of matrices in the block does not matter.  For
  82     * example, enumerating the names of members of the block, but not for
  83     * determining the offsets of members.
  84     */
  85    void process(ir_variable *var);
  86
  87 protected:
  88    /**
  89     * Method invoked for each leaf of the uniform
  90     *
  91     * \param type  Type of the field.
  92     * \param name  Fully qualified name of the field.
  93     */
  94    virtual void visit_field(const glsl_type *type, const char *name) = 0;
  95
  96 private:
  97    /**
  98     * \param name_length  Length of the current name \b not including the
  99     *                     terminating \c NUL character.
 100     */
 101    void recursion(const glsl_type *t, char **name, size_t name_length,
 102                   bool row_major);
 103 };
 104
 105 void
 106 linker_error(gl_shader_program *prog, const char *fmt, ...);
 107
 108 void
 109 linker_warning(gl_shader_program *prog, const char *fmt, ...);
 110
 111 unsigned
 112 count_attribute_slots(const glsl_type *t);
 113
 114 #endif /* GLSL_LINKER_H */