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 #include "loop_analysis.h"
  39
  40 extern "C" struct gl_shader *
  41 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type);
  42
  43 extern "C" void
  44 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  45                        struct gl_shader *sh);
  46
  47 /* Copied from shader_api.c for the stand-alone compiler.
  48  */
  49 void
  50 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  51                        struct gl_shader *sh)
  52 {
  53    *ptr = sh;
  54 }
  55
  56 struct gl_shader *
  57 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
  58 {
  59    struct gl_shader *shader;
  60
  61    (void) ctx;
  62
  63    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER);
  64    shader = talloc_zero(NULL, struct gl_shader);
  65    if (shader) {
  66       shader->Type = type;
  67       shader->Name = name;
  68       shader->RefCount = 1;
  69    }
  70    return shader;
  71 }
  72
  73 static void
  74 initialize_context(struct gl_context *ctx, gl_api api)
  75 {
  76    memset(ctx, 0, sizeof(*ctx));
  77
  78    ctx->API = api;
  79
  80    ctx->Extensions.ARB_draw_buffers = GL_TRUE;
  81    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
  82    ctx->Extensions.EXT_texture_array = GL_TRUE;
  83    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
  84
  85    /* 1.10 minimums. */
  86    ctx->Const.MaxLights = 8;
  87    ctx->Const.MaxClipPlanes = 8;
  88    ctx->Const.MaxTextureUnits = 2;
  89
  90    /* More than the 1.10 minimum to appease parser tests taken from
  91     * apps that (hopefully) already checked the number of coords.
  92     */
  93    ctx->Const.MaxTextureCoordUnits = 4;
  94
  95    ctx->Const.VertexProgram.MaxAttribs = 16;
  96    ctx->Const.VertexProgram.MaxUniformComponents = 512;
  97    ctx->Const.MaxVarying = 8;
  98    ctx->Const.MaxVertexTextureImageUnits = 0;
  99    ctx->Const.MaxCombinedTextureImageUnits = 2;
 100    ctx->Const.MaxTextureImageUnits = 2;
 101    ctx->Const.FragmentProgram.MaxUniformComponents = 64;
 102
 103    ctx->Const.MaxDrawBuffers = 2;
 104
 105    ctx->Driver.NewShader = _mesa_new_shader;
 106 }
 107
 108 /* Returned string will have 'ctx' as its talloc owner. */
 109 static char *
 110 load_text_file(void *ctx, const char *file_name)
 111 {
 112         char *text = NULL;
 113         struct stat st;
 114         ssize_t total_read = 0;
 115         int fd = open(file_name, O_RDONLY);
 116
 117         if (fd < 0) {
 118                 return NULL;
 119         }
 120
 121         if (fstat(fd, & st) == 0) {
 122            text = (char *) talloc_size(ctx, st.st_size + 1);
 123                 if (text != NULL) {
 124                         do {
 125                                 ssize_t bytes = read(fd, text + total_read,
 126                                                      st.st_size - total_read);
 127                                 if (bytes < 0) {
 128                                         free(text);
 129                                         text = NULL;
 130                                         break;
 131                                 }
 132
 133                                 if (bytes == 0) {
 134                                         break;
 135                                 }
 136
 137                                 total_read += bytes;
 138                         } while (total_read < st.st_size);
 139
 140                         text[total_read] = '\0';
 141                 }
 142         }
 143
 144         close(fd);
 145
 146         return text;
 147 }
 148
 149 int glsl_es = 0;
 150 int dump_ast = 0;
 151 int dump_hir = 0;
 152 int dump_lir = 0;
 153 int do_link = 0;
 154
 155 const struct option compiler_opts[] = {
 156    { "glsl-es",  0, &glsl_es,  1 },
 157    { "dump-ast", 0, &dump_ast, 1 },
 158    { "dump-hir", 0, &dump_hir, 1 },
 159    { "dump-lir", 0, &dump_lir, 1 },
 160    { "link",     0, &do_link,  1 },
 161    { NULL, 0, NULL, 0 }
 162 };
 163
 164 /**
 165  * \brief Print proper usage and exit with failure.
 166  */
 167 void
 168 usage_fail(const char *name)
 169 {
 170
 171    const char *header =
 172       "usage: %s [options] <file.vert | file.geom | file.frag>\n"
 173       "\n"
 174       "Possible options are:\n";
 175    printf(header, name, name);
 176    for (const struct option *o = compiler_opts; o->name != 0; ++o) {
 177       printf("    --%s\n", o->name);
 178    }
 179    exit(EXIT_FAILURE);
 180 }
 181
 182
 183 void
 184 compile_shader(struct gl_context *ctx, struct gl_shader *shader)
 185 {
 186    struct _mesa_glsl_parse_state *state =
 187       new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);
 188
 189    const char *source = shader->Source;
 190    state->error = preprocess(state, &source, &state->info_log,
 191                              state->extensions, ctx->API);
 192
 193    if (!state->error) {
 194       _mesa_glsl_lexer_ctor(state, source);
 195       _mesa_glsl_parse(state);
 196       _mesa_glsl_lexer_dtor(state);
 197    }
 198
 199    if (dump_ast) {
 200       foreach_list_const(n, &state->translation_unit) {
 201          ast_node *ast = exec_node_data(ast_node, n, link);
 202          ast->print();
 203       }
 204       printf("\n\n");
 205    }
 206
 207    shader->ir = new(shader) exec_list;
 208    if (!state->error && !state->translation_unit.is_empty())
 209       _mesa_ast_to_hir(shader->ir, state);
 210
 211    /* Print out the unoptimized IR. */
 212    if (!state->error && dump_hir) {
 213       validate_ir_tree(shader->ir);
 214       _mesa_print_ir(shader->ir, state);
 215    }
 216
 217    /* Optimization passes */
 218    if (!state->error && !shader->ir->is_empty()) {
 219       bool progress;
 220       do {
 221          progress = false;
 222
 223          progress = do_function_inlining(shader->ir) || progress;
 224          progress = do_if_simplification(shader->ir) || progress;
 225          progress = do_copy_propagation(shader->ir) || progress;
 226          progress = do_dead_code_local(shader->ir) || progress;
 227          progress = do_dead_code_unlinked(shader->ir) || progress;
 228          progress = do_tree_grafting(shader->ir) || progress;
 229          progress = do_constant_propagation(shader->ir) || progress;
 230          progress = do_constant_variable_unlinked(shader->ir) || progress;
 231          progress = do_constant_folding(shader->ir) || progress;
 232          progress = do_algebraic(shader->ir) || progress;
 233          progress = do_vec_index_to_swizzle(shader->ir) || progress;
 234          progress = do_vec_index_to_cond_assign(shader->ir) || progress;
 235          progress = do_swizzle_swizzle(shader->ir) || progress;
 236
 237          loop_state *ls = analyze_loop_variables(shader->ir);
 238          progress = set_loop_controls(shader->ir, ls) || progress;
 239          progress = unroll_loops(shader->ir, ls, 32) || progress;
 240          delete ls;
 241       } while (progress);
 242
 243       validate_ir_tree(shader->ir);
 244    }
 245
 246
 247    /* Print out the resulting IR */
 248    if (!state->error && dump_lir) {
 249       _mesa_print_ir(shader->ir, state);
 250    }
 251
 252    shader->symbols = state->symbols;
 253    shader->CompileStatus = !state->error;
 254    shader->Version = state->language_version;
 255    memcpy(shader->builtins_to_link, state->builtins_to_link,
 256           sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);
 257    shader->num_builtins_to_link = state->num_builtins_to_link;
 258
 259    if (shader->InfoLog)
 260       talloc_free(shader->InfoLog);
 261
 262    shader->InfoLog = state->info_log;
 263
 264    /* Retain any live IR, but trash the rest. */
 265    reparent_ir(shader->ir, shader);
 266
 267    talloc_free(state);
 268
 269    return;
 270 }
 271
 272 int
 273 main(int argc, char **argv)
 274 {
 275    int status = EXIT_SUCCESS;
 276    struct gl_context local_ctx;
 277    struct gl_context *ctx = &local_ctx;
 278
 279    int c;
 280    int idx = 0;
 281    while ((c = getopt_long(argc, argv, "", compiler_opts, &idx)) != -1)
 282       /* empty */ ;
 283
 284
 285    if (argc <= optind)
 286       usage_fail(argv[0]);
 287
 288    initialize_context(ctx, (glsl_es) ? API_OPENGLES2 : API_OPENGL);
 289
 290    struct gl_shader_program *whole_program;
 291
 292    whole_program = talloc_zero (NULL, struct gl_shader_program);
 293    assert(whole_program != NULL);
 294
 295    for (/* empty */; argc > optind; optind++) {
 296       whole_program->Shaders = (struct gl_shader **)
 297          talloc_realloc(whole_program, whole_program->Shaders,
 298                         struct gl_shader *, whole_program->NumShaders + 1);
 299       assert(whole_program->Shaders != NULL);
 300
 301       struct gl_shader *shader = talloc_zero(whole_program, gl_shader);
 302
 303       whole_program->Shaders[whole_program->NumShaders] = shader;
 304       whole_program->NumShaders++;
 305
 306       const unsigned len = strlen(argv[optind]);
 307       if (len < 6)
 308          usage_fail(argv[0]);
 309
 310       const char *const ext = & argv[optind][len - 5];
 311       if (strncmp(".vert", ext, 5) == 0)
 312          shader->Type = GL_VERTEX_SHADER;
 313       else if (strncmp(".geom", ext, 5) == 0)
 314          shader->Type = GL_GEOMETRY_SHADER;
 315       else if (strncmp(".frag", ext, 5) == 0)
 316          shader->Type = GL_FRAGMENT_SHADER;
 317       else
 318          usage_fail(argv[0]);
 319
 320       shader->Source = load_text_file(whole_program, argv[optind]);
 321       if (shader->Source == NULL) {
 322          printf("File \"%s\" does not exist.\n", argv[optind]);
 323          exit(EXIT_FAILURE);
 324       }
 325
 326       compile_shader(ctx, shader);
 327
 328       if (!shader->CompileStatus) {
 329          printf("Info log for %s:\n%s\n", argv[optind], shader->InfoLog);
 330          status = EXIT_FAILURE;
 331          break;
 332       }
 333    }
 334
 335    if ((status == EXIT_SUCCESS) && do_link)  {
 336       link_shaders(ctx, whole_program);
 337       status = (whole_program->LinkStatus) ? EXIT_SUCCESS : EXIT_FAILURE;
 338
 339       if (strlen(whole_program->InfoLog) > 0)
 340          printf("Info log for linking:\n%s\n", whole_program->InfoLog);
 341    }
 342
 343    for (unsigned i = 0; i < MESA_SHADER_TYPES; i++)
 344       talloc_free(whole_program->_LinkedShaders[i]);
 345
 346    talloc_free(whole_program);
 347    _mesa_glsl_release_types();
 348    _mesa_glsl_release_functions();
 349
 350    return status;
 351 }