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