325 lines
9.5 KiB
C++
325 lines
9.5 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include "glsl_parser_extras.h"
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#include "glsl_symbol_table.h"
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#include "ir.h"
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#include "builtin_variables.h"
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#ifndef Elements
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#define Elements(x) (sizeof(x)/sizeof(*(x)))
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#endif
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static ir_variable *
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add_variable(const char *name, enum ir_variable_mode mode,
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const glsl_type *type, exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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ir_variable *var = new ir_variable(type, name);
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var->mode = mode;
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switch (var->mode) {
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case ir_var_in:
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var->shader_in = true;
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var->read_only = true;
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break;
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case ir_var_inout:
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var->shader_in = true;
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var->shader_out = true;
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break;
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case ir_var_out:
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var->shader_out = true;
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break;
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case ir_var_uniform:
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var->shader_in = true;
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var->read_only = true;
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break;
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default:
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assert(0);
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break;
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}
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/* Once the variable is created an initialized, add it to the symbol table
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* and add the declaration to the IR stream.
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*/
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instructions->push_tail(var);
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symtab->add_variable(var->name, var);
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return var;
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}
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static void
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add_builtin_variable(const builtin_variable *proto, exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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/* Create a new variable declaration from the description supplied by
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* the caller.
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*/
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const glsl_type *const type = symtab->get_type(proto->type);
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assert(type != NULL);
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add_variable(proto->name, proto->mode, type, instructions, symtab);
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}
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static void
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generate_110_uniforms(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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for (unsigned i = 0
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; i < Elements(builtin_110_deprecated_uniforms)
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; i++) {
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add_builtin_variable(& builtin_110_deprecated_uniforms[i],
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instructions, symtab);
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}
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/* FINISHME: The size of this array is implementation dependent based on the
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* FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
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* FINISHME: at least 2, so hard-code 2 for now.
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*/
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const glsl_type *const mat4_array_type =
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glsl_type::get_array_instance(glsl_type::mat4_type, 2);
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add_variable("gl_TextureMatrix", ir_var_uniform, mat4_array_type,
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instructions, symtab);
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/* FINISHME: Add support for gl_DepthRangeParameters */
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/* FINISHME: Add support for gl_ClipPlane[] */
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/* FINISHME: Add support for gl_PointParameters */
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/* FINISHME: Add support for gl_MaterialParameters
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* FINISHME: (glFrontMaterial, glBackMaterial)
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*/
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/* FINISHME: Add support for gl_LightSource[] */
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/* FINISHME: Add support for gl_LightModel */
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/* FINISHME: Add support for gl_FrontLightProduct[], gl_BackLightProduct[] */
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/* FINISHME: Add support for gl_TextureEnvColor[] */
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/* FINISHME: Add support for gl_ObjectPlane*[], gl_EyePlane*[] */
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/* FINISHME: Add support for gl_Fog */
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}
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static void
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generate_110_vs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) {
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add_builtin_variable(& builtin_core_vs_variables[i],
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instructions, symtab);
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}
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for (unsigned i = 0
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; i < Elements(builtin_110_deprecated_vs_variables)
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; i++) {
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add_builtin_variable(& builtin_110_deprecated_vs_variables[i],
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instructions, symtab);
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}
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generate_110_uniforms(instructions, symtab);
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/* FINISHME: The size of this array is implementation dependent based on the
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* FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
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* FINISHME: at least 2, so hard-code 2 for now.
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*/
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const glsl_type *const vec4_array_type =
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glsl_type::get_array_instance(glsl_type::vec4_type, 2);
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add_variable("gl_TexCoord", ir_var_out, vec4_array_type, instructions,
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symtab);
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}
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static void
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generate_120_vs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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/* GLSL version 1.20 did not add any built-in variables in the vertex
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* shader.
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*/
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generate_110_vs_variables(instructions, symtab);
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}
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static void
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generate_130_vs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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generate_120_vs_variables(instructions, symtab);
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for (unsigned i = 0; i < Elements(builtin_130_vs_variables); i++) {
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add_builtin_variable(& builtin_130_vs_variables[i],
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instructions, symtab);
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}
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/* FINISHME: The size of this array is implementation dependent based on
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* FINISHME: the value of GL_MAX_CLIP_DISTANCES.
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*/
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const glsl_type *const clip_distance_array_type =
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glsl_type::get_array_instance(glsl_type::float_type, 8);
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add_variable("gl_ClipDistance", ir_var_out, clip_distance_array_type,
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instructions, symtab);
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}
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static void
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initialize_vs_variables(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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switch (state->language_version) {
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case 110:
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generate_110_vs_variables(instructions, state->symbols);
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break;
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case 120:
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generate_120_vs_variables(instructions, state->symbols);
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break;
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case 130:
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generate_130_vs_variables(instructions, state->symbols);
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break;
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}
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}
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static void
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generate_110_fs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) {
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add_builtin_variable(& builtin_core_fs_variables[i],
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instructions, symtab);
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}
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for (unsigned i = 0
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; i < Elements(builtin_110_deprecated_fs_variables)
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; i++) {
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add_builtin_variable(& builtin_110_deprecated_fs_variables[i],
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instructions, symtab);
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}
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generate_110_uniforms(instructions, symtab);
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/* FINISHME: The size of this array is implementation dependent based on the
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* FINISHME: value of GL_MAX_TEXTURE_COORDS. GL_MAX_TEXTURE_COORDS must be
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* FINISHME: at least 2, so hard-code 2 for now.
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*/
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const glsl_type *const vec4_array_type =
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glsl_type::get_array_instance(glsl_type::vec4_type, 2);
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add_variable("gl_TexCoord", ir_var_in, vec4_array_type, instructions,
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symtab);
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}
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static void
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generate_ARB_draw_buffers_fs_variables(exec_list *instructions,
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glsl_symbol_table *symtab, bool warn)
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{
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/* FINISHME: The size of this array is implementation dependent based on the
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* FINISHME: value of GL_MAX_DRAW_BUFFERS. GL_MAX_DRAW_BUFFERS must be
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* FINISHME: at least 1, so hard-code 1 for now.
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*/
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const glsl_type *const vec4_array_type =
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glsl_type::get_array_instance(glsl_type::vec4_type, 1);
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ir_variable *const fd =
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add_variable("gl_FragData", ir_var_out, vec4_array_type, instructions,
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symtab);
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if (warn)
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fd->warn_extension = "GL_ARB_draw_buffers";
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}
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static void
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generate_120_fs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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generate_110_fs_variables(instructions, symtab);
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generate_ARB_draw_buffers_fs_variables(instructions, symtab, false);
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}
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static void
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generate_130_fs_variables(exec_list *instructions,
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glsl_symbol_table *symtab)
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{
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generate_120_fs_variables(instructions, symtab);
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/* FINISHME: The size of this array is implementation dependent based on
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* FINISHME: the value of GL_MAX_CLIP_DISTANCES.
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*/
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const glsl_type *const clip_distance_array_type =
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glsl_type::get_array_instance(glsl_type::float_type, 8);
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add_variable("gl_ClipDistance", ir_var_in, clip_distance_array_type,
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instructions, symtab);
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}
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static void
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initialize_fs_variables(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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switch (state->language_version) {
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case 110:
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generate_110_fs_variables(instructions, state->symbols);
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break;
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case 120:
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generate_120_fs_variables(instructions, state->symbols);
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break;
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case 130:
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generate_130_fs_variables(instructions, state->symbols);
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break;
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}
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/* Since GL_ARB_draw_buffers is included in GLSL 1.20 and later, we
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* can basically ignore any extension settings for it.
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*/
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if (state->language_version < 120) {
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if (state->ARB_draw_buffers_enable) {
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generate_ARB_draw_buffers_fs_variables(instructions, state->symbols,
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state->ARB_draw_buffers_warn);
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}
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}
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}
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void
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_mesa_glsl_initialize_variables(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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switch (state->target) {
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case vertex_shader:
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initialize_vs_variables(instructions, state);
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break;
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case geometry_shader:
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break;
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case fragment_shader:
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initialize_fs_variables(instructions, state);
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break;
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case ir_shader:
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fprintf(stderr, "ir reader has no builtin variables");
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exit(1);
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break;
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}
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}
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