src/glsl/linker.h

/* -*- c++ -*- */
/*
 * Copyright © 2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#pragma once
#ifndef GLSL_LINKER_H
#define GLSL_LINKER_H

extern bool
link_function_calls(gl_shader_program *prog, gl_shader *main,
		    gl_shader **shader_list, unsigned num_shaders);

extern void
link_invalidate_variable_locations(gl_shader *sh, enum ir_variable_mode mode,
				   int generic_base);

extern void
link_assign_uniform_locations(struct gl_shader_program *prog);

extern void
link_set_uniform_initializers(struct gl_shader_program *prog);

extern int
link_cross_validate_uniform_block(void *mem_ctx,
				  struct gl_uniform_block **linked_blocks,
				  unsigned int *num_linked_blocks,
				  struct gl_uniform_block *new_block);

void
link_assign_uniform_block_offsets(struct gl_shader *shader);

/**
 * Class for processing all of the leaf fields of an uniform
 *
 * Leaves are, roughly speaking, the parts of the uniform that the application
 * could query with \c glGetUniformLocation (or that could be returned by
 * \c glGetActiveUniforms).
 *
 * Classes my derive from this class to implement specific functionality.
 * This class only provides the mechanism to iterate over the leaves.  Derived
 * classes must implement \c ::visit_field and may override \c ::process.
 */
class uniform_field_visitor {
public:
   /**
    * Begin processing a uniform
    *
    * Classes that overload this function should call \c ::process from the
    * base class to start the recursive processing of the uniform.
    *
    * \param var  The uniform variable that is to be processed
    *
    * Calls \c ::visit_field for each leaf of the uniform.
    */
   void process(ir_variable *var);

protected:
   /**
    * Method invoked for each leaf of the uniform
    *
    * \param type  Type of the field.
    * \param name  Fully qualified name of the field.
    */
   virtual void visit_field(const glsl_type *type, const char *name) = 0;

private:
   /**
    * \param name_length  Length of the current name \b not including the
    *                     terminating \c NUL character.
    */
   void recursion(const glsl_type *t, char **name, size_t name_length);
};

#endif /* GLSL_LINKER_H */