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 <getopt.h>
  24
  25 #include "ast.h"
  26 #include "glsl_parser_extras.h"
  27 #include "glsl_parser.h"
  28 #include "ir_optimization.h"
  29 #include "ir_print_visitor.h"
  30 #include "program.h"
  31 #include "loop_analysis.h"
  32
  33 extern "C" struct gl_shader *
  34 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type);
  35
  36 extern "C" void
  37 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  38                        struct gl_shader *sh);
  39
  40 /* Copied from shader_api.c for the stand-alone compiler.
  41  */
  42 void
  43 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  44                        struct gl_shader *sh)
  45 {
  46    *ptr = sh;
  47 }
  48
  49 struct gl_shader *
  50 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
  51 {
  52    struct gl_shader *shader;
  53
  54    (void) ctx;
  55
  56    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER);
  57    shader = rzalloc(NULL, struct gl_shader);
  58    if (shader) {
  59       shader->Type = type;
  60       shader->Name = name;
  61       shader->RefCount = 1;
  62    }
  63    return shader;
  64 }
  65
  66 static void
  67 initialize_context(struct gl_context *ctx, gl_api api)
  68 {
  69    memset(ctx, 0, sizeof(*ctx));
  70
  71    ctx->API = api;
  72
  73    ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
  74    ctx->Extensions.ARB_draw_buffers = GL_TRUE;
  75    ctx->Extensions.ARB_draw_instanced = GL_TRUE;
  76    ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
  77    ctx->Extensions.EXT_texture_array = GL_TRUE;
  78    ctx->Extensions.NV_texture_rectangle = GL_TRUE;
  79    ctx->Extensions.EXT_texture3D = GL_TRUE;
  80
  81    /* GLSL 1.30 isn't fully supported, but we need to advertise 1.30 so that
  82     * the built-in functions for 1.30 can be built.
  83     */
  84    ctx->Const.GLSLVersion = 130;
  85
  86    /* 1.10 minimums. */
  87    ctx->Const.MaxLights = 8;
  88    ctx->Const.MaxClipPlanes = 8;
  89    ctx->Const.MaxTextureUnits = 2;
  90
  91    /* More than the 1.10 minimum to appease parser tests taken from
  92     * apps that (hopefully) already checked the number of coords.
  93     */
  94    ctx->Const.MaxTextureCoordUnits = 4;
  95
  96    ctx->Const.VertexProgram.MaxAttribs = 16;
  97    ctx->Const.VertexProgram.MaxUniformComponents = 512;
  98    ctx->Const.MaxVarying = 8;
  99    ctx->Const.MaxVertexTextureImageUnits = 0;
 100    ctx->Const.MaxCombinedTextureImageUnits = 2;
 101    ctx->Const.MaxTextureImageUnits = 2;
 102    ctx->Const.FragmentProgram.MaxUniformComponents = 64;
 103
 104    ctx->Const.MaxDrawBuffers = 2;
 105
 106    ctx->Driver.NewShader = _mesa_new_shader;
 107 }
 108
 109 /* Returned string will have 'ctx' as its ralloc owner. */
 110 static char *
 111 load_text_file(void *ctx, const char *file_name)
 112 {
 113         char *text = NULL;
 114         size_t size;
 115         size_t total_read = 0;
 116         FILE *fp = fopen(file_name, "rb");
 117
 118         if (!fp) {
 119                 return NULL;
 120         }
 121
 122         fseek(fp, 0L, SEEK_END);
 123         size = ftell(fp);
 124         fseek(fp, 0L, SEEK_SET);
 125
 126         text = (char *) ralloc_size(ctx, size + 1);
 127         if (text != NULL) {
 128                 do {
 129                         size_t bytes = fread(text + total_read,
 130                                              1, size - total_read, fp);
 131                         if (bytes < size - total_read) {
 132                                 free(text);
 133                                 text = NULL;
 134                                 break;
 135                         }
 136
 137                         if (bytes == 0) {
 138                                 break;
 139                         }
 140
 141                         total_read += bytes;
 142                 } while (total_read < size);
 143
 144                 text[total_read] = '\0';
 145         }
 146
 147         fclose(fp);
 148
 149         return text;
 150 }
 151
 152 int glsl_es = 0;
 153 int dump_ast = 0;
 154 int dump_hir = 0;
 155 int dump_lir = 0;
 156 int do_link = 0;
 157
 158 const struct option compiler_opts[] = {
 159    { "glsl-es",  0, &glsl_es,  1 },
 160    { "dump-ast", 0, &dump_ast, 1 },
 161    { "dump-hir", 0, &dump_hir, 1 },
 162    { "dump-lir", 0, &dump_lir, 1 },
 163    { "link",     0, &do_link,  1 },
 164    { NULL, 0, NULL, 0 }
 165 };
 166
 167 /**
 168  * \brief Print proper usage and exit with failure.
 169  */
 170 void
 171 usage_fail(const char *name)
 172 {
 173
 174    const char *header =
 175       "usage: %s [options] <file.vert | file.geom | file.frag>\n"
 176       "\n"
 177       "Possible options are:\n";
 178    printf(header, name, name);
 179    for (const struct option *o = compiler_opts; o->name != 0; ++o) {
 180       printf("    --%s\n", o->name);
 181    }
 182    exit(EXIT_FAILURE);
 183 }
 184
 185
 186 void
 187 compile_shader(struct gl_context *ctx, struct gl_shader *shader)
 188 {
 189    struct _mesa_glsl_parse_state *state =
 190       new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);
 191
 192    const char *source = shader->Source;
 193    state->error = preprocess(state, &source, &state->info_log,
 194                              state->extensions, ctx->API) != 0;
 195
 196    if (!state->error) {
 197       _mesa_glsl_lexer_ctor(state, source);
 198       _mesa_glsl_parse(state);
 199       _mesa_glsl_lexer_dtor(state);
 200    }
 201
 202    if (dump_ast) {
 203       foreach_list_const(n, &state->translation_unit) {
 204          ast_node *ast = exec_node_data(ast_node, n, link);
 205          ast->print();
 206       }
 207       printf("\n\n");
 208    }
 209
 210    shader->ir = new(shader) exec_list;
 211    if (!state->error && !state->translation_unit.is_empty())
 212       _mesa_ast_to_hir(shader->ir, state);
 213
 214    /* Print out the unoptimized IR. */
 215    if (!state->error && dump_hir) {
 216       validate_ir_tree(shader->ir);
 217       _mesa_print_ir(shader->ir, state);
 218    }
 219
 220    /* Optimization passes */
 221    if (!state->error && !shader->ir->is_empty()) {
 222       bool progress;
 223       do {
 224          progress = do_common_optimization(shader->ir, false, 32);
 225       } while (progress);
 226
 227       validate_ir_tree(shader->ir);
 228    }
 229
 230
 231    /* Print out the resulting IR */
 232    if (!state->error && dump_lir) {
 233       _mesa_print_ir(shader->ir, state);
 234    }
 235
 236    shader->symbols = state->symbols;
 237    shader->CompileStatus = !state->error;
 238    shader->Version = state->language_version;
 239    memcpy(shader->builtins_to_link, state->builtins_to_link,
 240           sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);
 241    shader->num_builtins_to_link = state->num_builtins_to_link;
 242
 243    if (shader->InfoLog)
 244       ralloc_free(shader->InfoLog);
 245
 246    shader->InfoLog = state->info_log;
 247
 248    /* Retain any live IR, but trash the rest. */
 249    reparent_ir(shader->ir, shader);
 250
 251    ralloc_free(state);
 252
 253    return;
 254 }
 255
 256 int
 257 main(int argc, char **argv)
 258 {
 259    int status = EXIT_SUCCESS;
 260    struct gl_context local_ctx;
 261    struct gl_context *ctx = &local_ctx;
 262
 263    int c;
 264    int idx = 0;
 265    while ((c = getopt_long(argc, argv, "", compiler_opts, &idx)) != -1)
 266       /* empty */ ;
 267
 268
 269    if (argc <= optind)
 270       usage_fail(argv[0]);
 271
 272    initialize_context(ctx, (glsl_es) ? API_OPENGLES2 : API_OPENGL);
 273
 274    struct gl_shader_program *whole_program;
 275
 276    whole_program = rzalloc (NULL, struct gl_shader_program);
 277    assert(whole_program != NULL);
 278
 279    for (/* empty */; argc > optind; optind++) {
 280       whole_program->Shaders =
 281          reralloc(whole_program, whole_program->Shaders,
 282                   struct gl_shader *, whole_program->NumShaders + 1);
 283       assert(whole_program->Shaders != NULL);
 284
 285       struct gl_shader *shader = rzalloc(whole_program, gl_shader);
 286
 287       whole_program->Shaders[whole_program->NumShaders] = shader;
 288       whole_program->NumShaders++;
 289
 290       const unsigned len = strlen(argv[optind]);
 291       if (len < 6)
 292          usage_fail(argv[0]);
 293
 294       const char *const ext = & argv[optind][len - 5];
 295       if (strncmp(".vert", ext, 5) == 0)
 296          shader->Type = GL_VERTEX_SHADER;
 297       else if (strncmp(".geom", ext, 5) == 0)
 298          shader->Type = GL_GEOMETRY_SHADER;
 299       else if (strncmp(".frag", ext, 5) == 0)
 300          shader->Type = GL_FRAGMENT_SHADER;
 301       else
 302          usage_fail(argv[0]);
 303
 304       shader->Source = load_text_file(whole_program, argv[optind]);
 305       if (shader->Source == NULL) {
 306          printf("File \"%s\" does not exist.\n", argv[optind]);
 307          exit(EXIT_FAILURE);
 308       }
 309
 310       compile_shader(ctx, shader);
 311
 312       if (!shader->CompileStatus) {
 313          printf("Info log for %s:\n%s\n", argv[optind], shader->InfoLog);
 314          status = EXIT_FAILURE;
 315          break;
 316       }
 317    }
 318
 319    if ((status == EXIT_SUCCESS) && do_link)  {
 320       link_shaders(ctx, whole_program);
 321       status = (whole_program->LinkStatus) ? EXIT_SUCCESS : EXIT_FAILURE;
 322
 323       if (strlen(whole_program->InfoLog) > 0)
 324          printf("Info log for linking:\n%s\n", whole_program->InfoLog);
 325    }
 326
 327    for (unsigned i = 0; i < MESA_SHADER_TYPES; i++)
 328       ralloc_free(whole_program->_LinkedShaders[i]);
 329
 330    ralloc_free(whole_program);
 331    _mesa_glsl_release_types();
 332    _mesa_glsl_release_functions();
 333
 334    return status;
 335 }