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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 /**
53  * Class for processing all of the leaf fields of an uniform
54  *
55  * Leaves are, roughly speaking, the parts of the uniform that the application
56  * could query with \c glGetUniformLocation (or that could be returned by
57  * \c glGetActiveUniforms).
58  *
59  * Classes my derive from this class to implement specific functionality.
60  * This class only provides the mechanism to iterate over the leaves.  Derived
61  * classes must implement \c ::visit_field and may override \c ::process.
62  */
63 class uniform_field_visitor {
64 public:
65    /**
66     * Begin processing a uniform
67     *
68     * Classes that overload this function should call \c ::process from the
69     * base class to start the recursive processing of the uniform.
70     *
71     * \param var  The uniform variable that is to be processed
72     *
73     * Calls \c ::visit_field for each leaf of the uniform.
74     */
75    void process(ir_variable *var);
76 
77 protected:
78    /**
79     * Method invoked for each leaf of the uniform
80     *
81     * \param type  Type of the field.
82     * \param name  Fully qualified name of the field.
83     */
84    virtual void visit_field(const glsl_type *type, const char *name) = 0;
85 
86 private:
87    /**
88     * \param name_length  Length of the current name \b not including the
89     *                     terminating \c NUL character.
90     */
91    void recursion(const glsl_type *t, char **name, size_t name_length);
92 };
93 
94 #endif /* GLSL_LINKER_H */
95