diff options
Diffstat (limited to 'src/mesa/shader/slang/slang_preprocess.c')
| -rw-r--r-- | src/mesa/shader/slang/slang_preprocess.c | 94 |
1 files changed, 88 insertions, 6 deletions
diff --git a/src/mesa/shader/slang/slang_preprocess.c b/src/mesa/shader/slang/slang_preprocess.c index ff913ad883..e9a24cc009 100644 --- a/src/mesa/shader/slang/slang_preprocess.c +++ b/src/mesa/shader/slang/slang_preprocess.c @@ -1035,11 +1035,11 @@ preprocess_source (slang_string *output, const char *source, /* Parse optional macro parameters. */ while (prod[i++] != PARAM_END) { - if (state.cond.top->effective) { - pp_symbol *param; + pp_symbol *param; - id = (const char *) (&prod[i]); - idlen = _mesa_strlen (id); + id = (const char *) (&prod[i]); + idlen = _mesa_strlen (id); + if (state.cond.top->effective) { pp_annotate (output, "%s, ", id); param = pp_symbols_push (&symbol->parameters); if (param == NULL) @@ -1053,8 +1053,23 @@ preprocess_source (slang_string *output, const char *source, id = (const char *) (&prod[i]); idlen = _mesa_strlen (id); if (state.cond.top->effective) { + slang_string replacement; + expand_state es; + pp_annotate (output, ") %s", id); - slang_string_pushs (&symbol->replacement, id, idlen); + + slang_string_init(&replacement); + slang_string_pushs(&replacement, id, idlen); + + /* Expand macro replacement. */ + es.output = &symbol->replacement; + es.input = slang_string_cstr(&replacement); + es.state = &state; + if (!expand(&es, &state.symbols)) { + slang_string_free(&replacement); + goto error; + } + slang_string_free(&replacement); } i += idlen + 1; } @@ -1286,6 +1301,45 @@ error: /** + * Remove the continuation characters from the input string. + * This is the very first step in preprocessing and is effective + * even inside comment blocks. + * If there is a whitespace between a backslash and a newline, + * this is not considered as a line continuation. + * \return GL_TRUE for success, GL_FALSE otherwise. + */ +static GLboolean +_slang_preprocess_backslashes(slang_string *output, + const char *input) +{ + while (*input) { + if (input[0] == '\\') { + /* If a newline follows, eat the backslash and the newline. */ + if (input[1] == '\r') { + if (input[2] == '\n') { + input += 3; + } else { + input += 2; + } + } else if (input[1] == '\n') { + if (input[2] == '\r') { + input += 3; + } else { + input += 2; + } + } else { + /* Leave the backslash alone. */ + slang_string_pushc(output, *input++); + } + } else { + slang_string_pushc(output, *input++); + } + } + return GL_TRUE; +} + + +/** * Run preprocessor on source code. * \param extensions indicates which GL extensions are enabled * \param output the post-process results @@ -1304,6 +1358,7 @@ _slang_preprocess_directives(slang_string *output, { grammar pid, eid; GLboolean success; + slang_string without_backslashes; pid = grammar_load_from_text ((const byte *) (slang_pp_directives_syn)); if (pid == 0) { @@ -1316,9 +1371,36 @@ _slang_preprocess_directives(slang_string *output, grammar_destroy (pid); return GL_FALSE; } - success = preprocess_source (output, input, pid, eid, elog, extensions, pragmas); + + slang_string_init(&without_backslashes); + success = _slang_preprocess_backslashes(&without_backslashes, input); + + if (0) { + _mesa_printf("Pre-processed shader:\n"); + _mesa_printf("%s", slang_string_cstr(&without_backslashes)); + _mesa_printf("----------------------\n"); + } + + if (success) { + success = preprocess_source(output, + slang_string_cstr(&without_backslashes), + pid, + eid, + elog, + extensions, + pragmas); + } + + slang_string_free(&without_backslashes); grammar_destroy (eid); grammar_destroy (pid); + + if (0) { + _mesa_printf("Post-processed shader:\n"); + _mesa_printf("%s", slang_string_cstr(output)); + _mesa_printf("----------------------\n"); + } + return success; } |