src/glsl/main.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <cstdlib>
  24 #include <cstdio>
  25 #include <getopt.h>
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31
  32 #include "ast.h"
  33 #include "glsl_parser_extras.h"
  34 #include "glsl_parser.h"
  35 #include "ir_optimization.h"
  36 #include "ir_print_visitor.h"
  37 #include "program.h"
  38
  39 extern "C" struct gl_shader *
  40 _mesa_new_shader(GLcontext *ctx, GLuint name, GLenum type);
  41
  42 /* Copied from shader_api.c for the stand-alone compiler.
  43  */
  44 struct gl_shader *
  45 _mesa_new_shader(GLcontext *ctx, GLuint name, GLenum type)
  46 {
  47    struct gl_shader *shader;
  48    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER);
  49    shader = talloc_zero(NULL, struct gl_shader);
  50    if (shader) {
  51       shader->Type = type;
  52       shader->Name = name;
  53       shader->RefCount = 1;
  54    }
  55    return shader;
  56 }
  57
  58 /* Returned string will have 'ctx' as its talloc owner. */
  59 static char *
  60 load_text_file(void *ctx, const char *file_name)
  61 {
  62         char *text = NULL;
  63         struct stat st;
  64         ssize_t total_read = 0;
  65         int fd = open(file_name, O_RDONLY);
  66
  67         if (fd < 0) {
  68                 return NULL;
  69         }
  70
  71         if (fstat(fd, & st) == 0) {
  72            text = (char *) talloc_size(ctx, st.st_size + 1);
  73                 if (text != NULL) {
  74                         do {
  75                                 ssize_t bytes = read(fd, text + total_read,
  76                                                      st.st_size - total_read);
  77                                 if (bytes < 0) {
  78                                         free(text);
  79                                         text = NULL;
  80                                         break;
  81                                 }
  82
  83                                 if (bytes == 0) {
  84                                         break;
  85                                 }
  86
  87                                 total_read += bytes;
  88                         } while (total_read < st.st_size);
  89
  90                         text[total_read] = '\0';
  91                 }
  92         }
  93
  94         close(fd);
  95
  96         return text;
  97 }
  98
  99
 100 void
 101 usage_fail(const char *name)
 102 {
 103       printf("%s <filename.frag|filename.vert>\n", name);
 104       exit(EXIT_FAILURE);
 105 }
 106
 107
 108 int dump_ast = 0;
 109 int dump_hir = 0;
 110 int dump_lir = 0;
 111 int do_link = 0;
 112
 113 const struct option compiler_opts[] = {
 114    { "dump-ast", 0, &dump_ast, 1 },
 115    { "dump-hir", 0, &dump_hir, 1 },
 116    { "dump-lir", 0, &dump_lir, 1 },
 117    { "link",     0, &do_link,  1 },
 118    { NULL, 0, NULL, 0 }
 119 };
 120
 121 void
 122 compile_shader(struct gl_shader *shader)
 123 {
 124    struct _mesa_glsl_parse_state *state =
 125       new(shader) _mesa_glsl_parse_state(NULL, shader->Type, shader);
 126
 127    const char *source = shader->Source;
 128    state->error = preprocess(state, &source, &state->info_log,
 129                              state->extensions);
 130
 131    if (!state->error) {
 132       _mesa_glsl_lexer_ctor(state, source);
 133       _mesa_glsl_parse(state);
 134       _mesa_glsl_lexer_dtor(state);
 135    }
 136
 137    if (dump_ast) {
 138       foreach_list_const(n, &state->translation_unit) {
 139          ast_node *ast = exec_node_data(ast_node, n, link);
 140          ast->print();
 141       }
 142       printf("\n\n");
 143    }
 144
 145    shader->ir = new(shader) exec_list;
 146    if (!state->error && !state->translation_unit.is_empty())
 147       _mesa_ast_to_hir(shader->ir, state);
 148
 149    /* Print out the unoptimized IR. */
 150    if (!state->error && dump_hir) {
 151       validate_ir_tree(shader->ir);
 152       _mesa_print_ir(shader->ir, state);
 153    }
 154
 155    /* Optimization passes */
 156    if (!state->error && !shader->ir->is_empty()) {
 157       bool progress;
 158       do {
 159          progress = false;
 160
 161          progress = do_function_inlining(shader->ir) || progress;
 162          progress = do_if_simplification(shader->ir) || progress;
 163          progress = do_copy_propagation(shader->ir) || progress;
 164          progress = do_dead_code_local(shader->ir) || progress;
 165          progress = do_dead_code_unlinked(shader->ir) || progress;
 166          progress = do_constant_variable_unlinked(shader->ir) || progress;
 167          progress = do_constant_folding(shader->ir) || progress;
 168          progress = do_algebraic(shader->ir) || progress;
 169          progress = do_vec_index_to_swizzle(shader->ir) || progress;
 170          progress = do_vec_index_to_cond_assign(shader->ir) || progress;
 171          progress = do_swizzle_swizzle(shader->ir) || progress;
 172       } while (progress);
 173
 174       validate_ir_tree(shader->ir);
 175    }
 176
 177
 178    /* Print out the resulting IR */
 179    if (!state->error && dump_lir) {
 180       _mesa_print_ir(shader->ir, state);
 181    }
 182
 183    shader->symbols = state->symbols;
 184    shader->CompileStatus = !state->error;
 185    shader->Version = state->language_version;
 186    memcpy(shader->builtins_to_link, state->builtins_to_link,
 187           sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);
 188    shader->num_builtins_to_link = state->num_builtins_to_link;
 189
 190    if (shader->InfoLog)
 191       talloc_free(shader->InfoLog);
 192
 193    shader->InfoLog = state->info_log;
 194
 195    /* Retain any live IR, but trash the rest. */
 196    reparent_ir(shader->ir, shader);
 197
 198    talloc_free(state);
 199
 200    return;
 201 }
 202
 203 int
 204 main(int argc, char **argv)
 205 {
 206    int status = EXIT_SUCCESS;
 207
 208    int c;
 209    int idx = 0;
 210    while ((c = getopt_long(argc, argv, "", compiler_opts, &idx)) != -1)
 211       /* empty */ ;
 212
 213
 214    if (argc <= optind)
 215       usage_fail(argv[0]);
 216
 217    struct gl_shader_program *whole_program;
 218
 219    whole_program = talloc_zero (NULL, struct gl_shader_program);
 220    assert(whole_program != NULL);
 221
 222    for (/* empty */; argc > optind; optind++) {
 223       whole_program->Shaders = (struct gl_shader **)
 224          talloc_realloc(whole_program, whole_program->Shaders,
 225                         struct gl_shader *, whole_program->NumShaders + 1);
 226       assert(whole_program->Shaders != NULL);
 227
 228       struct gl_shader *shader = talloc_zero(whole_program, gl_shader);
 229
 230       whole_program->Shaders[whole_program->NumShaders] = shader;
 231       whole_program->NumShaders++;
 232
 233       const unsigned len = strlen(argv[optind]);
 234       if (len < 6)
 235          usage_fail(argv[0]);
 236
 237       const char *const ext = & argv[optind][len - 5];
 238       if (strncmp(".vert", ext, 5) == 0)
 239          shader->Type = GL_VERTEX_SHADER;
 240       else if (strncmp(".geom", ext, 5) == 0)
 241          shader->Type = GL_GEOMETRY_SHADER;
 242       else if (strncmp(".frag", ext, 5) == 0)
 243          shader->Type = GL_FRAGMENT_SHADER;
 244       else
 245          usage_fail(argv[0]);
 246
 247       shader->Source = load_text_file(whole_program, argv[optind]);
 248       if (shader->Source == NULL) {
 249          printf("File \"%s\" does not exist.\n", argv[optind]);
 250          exit(EXIT_FAILURE);
 251       }
 252
 253       compile_shader(shader);
 254
 255       if (!shader->CompileStatus) {
 256          printf("Info log for %s:\n%s\n", argv[optind], shader->InfoLog);
 257          status = EXIT_FAILURE;
 258          break;
 259       }
 260    }
 261
 262    if ((status == EXIT_SUCCESS) && do_link)  {
 263       link_shaders(whole_program);
 264       status = (whole_program->LinkStatus) ? EXIT_SUCCESS : EXIT_FAILURE;
 265
 266       if (strlen(whole_program->InfoLog) > 0)
 267          printf("Info log for linking:\n%s\n", whole_program->InfoLog);
 268    }
 269
 270    for (unsigned i = 0; i < whole_program->_NumLinkedShaders; i++)
 271       talloc_free(whole_program->_LinkedShaders[i]);
 272
 273    talloc_free(whole_program);
 274    _mesa_glsl_release_types();
 275    _mesa_glsl_release_functions();
 276
 277    return status;
 278 }