C++ (Cpp) standalone_compile_shader Examples

Example #1

File: main.cpp Project: chemecse/mesa

int
main(int argc, char * const* argv)
{
   int status = EXIT_SUCCESS;

   int c;
   int idx = 0;
   while ((c = getopt_long(argc, argv, "", compiler_opts, &idx)) != -1) {
      switch (c) {
      case 'v':
         options.glsl_version = strtol(optarg, NULL, 10);
         break;
      default:
         break;
      }
   }

   if (argc <= optind)
      usage_fail(argv[0]);

   struct gl_shader_program *whole_program;

   whole_program = standalone_compile_shader(&options, argc - optind, &argv[optind]);

   if (!whole_program)
      usage_fail(argv[0]);

   standalone_compiler_cleanup(whole_program);

   return status;
}

Example #2

File: ir3_cmdline.c Project: Kalamatee/mesa

static nir_shader *
load_glsl(unsigned num_files, char* const* files, gl_shader_stage stage)
{
	static const struct standalone_options options = {
			.glsl_version = 140,
			.do_link = true,
	};
	struct gl_shader_program *prog;

	prog = standalone_compile_shader(&options, num_files, files);
	if (!prog)
		errx(1, "couldn't parse `%s'", files[0]);

	nir_shader *nir = glsl_to_nir(prog, stage, ir3_get_compiler_options());

	standalone_compiler_cleanup(prog);

	/* required NIR passes: */
	/* TODO cmdline args for some of the conditional lowering passes? */

	NIR_PASS_V(nir, nir_lower_io_to_temporaries,
			nir_shader_get_entrypoint(nir),
			true, true);
	NIR_PASS_V(nir, nir_lower_global_vars_to_local);
	NIR_PASS_V(nir, nir_split_var_copies);
	NIR_PASS_V(nir, nir_lower_var_copies);

	NIR_PASS_V(nir, nir_split_var_copies);
	NIR_PASS_V(nir, nir_lower_var_copies);
	NIR_PASS_V(nir, nir_lower_io_types);

	// TODO nir_assign_var_locations??

	NIR_PASS_V(nir, nir_lower_system_values);
	NIR_PASS_V(nir, nir_lower_io, nir_var_all, st_glsl_type_size);
	NIR_PASS_V(nir, nir_lower_samplers, prog);

	return nir;
}

static int
read_file(const char *filename, void **ptr, size_t *size)
{
	int fd, ret;
	struct stat st;

	*ptr = MAP_FAILED;

	fd = open(filename, O_RDONLY);
	if (fd == -1) {
		warnx("couldn't open `%s'", filename);
		return 1;
	}

	ret = fstat(fd, &st);
	if (ret)
		errx(1, "couldn't stat `%s'", filename);

	*size = st.st_size;
	*ptr = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
	if (*ptr == MAP_FAILED)
		errx(1, "couldn't map `%s'", filename);

	close(fd);

	return 0;
}