diff options
| -rw-r--r-- | src/glsl/Makefile | 1 | ||||
| -rw-r--r-- | src/glsl/link_uniforms.cpp | 85 | ||||
| -rw-r--r-- | src/glsl/linker.h | 43 |
3 files changed, 129 insertions, 0 deletions
diff --git a/src/glsl/Makefile b/src/glsl/Makefile index b2efb2abc51..504f1fb43eb 100644 --- a/src/glsl/Makefile +++ b/src/glsl/Makefile @@ -53,6 +53,7 @@ CXX_SOURCES = \ ir_variable_refcount.cpp \ linker.cpp \ link_functions.cpp \ + link_uniforms.cpp \ loop_analysis.cpp \ loop_controls.cpp \ loop_unroll.cpp \ diff --git a/src/glsl/link_uniforms.cpp b/src/glsl/link_uniforms.cpp new file mode 100644 index 00000000000..6dd1f535451 --- /dev/null +++ b/src/glsl/link_uniforms.cpp @@ -0,0 +1,85 @@ +/* + * Copyright © 2011 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. + */ + +#include "main/core.h" +#include "ir.h" +#include "linker.h" +#include "glsl_symbol_table.h" +#include "program/hash_table.h" + +/** + * \file link_uniforms.cpp + * Assign locations for GLSL uniforms. + * + * \author Ian Romanick <[email protected]> + */ + +void +uniform_field_visitor::process(ir_variable *var) +{ + const glsl_type *t = var->type; + + /* Only strdup the name if we actually will need to modify it. */ + if (t->is_record() || (t->is_array() && t->fields.array->is_record())) { + char *name = ralloc_strdup(NULL, var->name); + recursion(var->type, &name, strlen(name)); + ralloc_free(name); + } else { + this->visit_field(t, var->name); + } +} + +void +uniform_field_visitor::recursion(const glsl_type *t, char **name, + unsigned name_length) +{ + /* Records need to have each field processed individually. + * + * Arrays of records need to have each array element processed + * individually, then each field of the resulting array elements processed + * individually. + */ + if (t->is_record()) { + for (unsigned i = 0; i < t->length; i++) { + const char *field = t->fields.structure[i].name; + + /* Append '.field' to the current uniform name. */ + ralloc_asprintf_rewrite_tail(name, name_length, ".%s", field); + + recursion(t->fields.structure[i].type, name, + name_length + 1 + strlen(field)); + } + } else if (t->is_array() && t->fields.array->is_record()) { + for (unsigned i = 0; i < t->length; i++) { + char subscript[13]; + + /* Append the subscript to the current uniform name */ + const unsigned subscript_length = snprintf(subscript, 13, "[%u]", i); + ralloc_asprintf_rewrite_tail(name, name_length, "%s", subscript); + + recursion(t->fields.array, name, name_length + subscript_length); + } + } else { + this->visit_field(t, *name); + } +} diff --git a/src/glsl/linker.h b/src/glsl/linker.h index 769cf68b6ad..78c63296133 100644 --- a/src/glsl/linker.h +++ b/src/glsl/linker.h @@ -1,3 +1,4 @@ +/* -*- c++ -*- */ /* * Copyright © 2010 Intel Corporation * @@ -29,4 +30,46 @@ extern bool link_function_calls(gl_shader_program *prog, gl_shader *main, gl_shader **shader_list, unsigned num_shaders); +/** + * 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, unsigned name_length); +}; + #endif /* GLSL_LINKER_H */ |