diff options
Diffstat (limited to 'source/blender/gpu/intern/gpu_shader_dependency.cc')
| -rw-r--r-- | source/blender/gpu/intern/gpu_shader_dependency.cc | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_shader_dependency.cc b/source/blender/gpu/intern/gpu_shader_dependency.cc index 267acb27072..61a732932eb 100644 --- a/source/blender/gpu/intern/gpu_shader_dependency.cc +++ b/source/blender/gpu/intern/gpu_shader_dependency.cc @@ -26,6 +26,7 @@ #include <iostream> #include <regex> +#include <sstream> #include "BLI_ghash.h" #include "BLI_map.hh" @@ -112,6 +113,14 @@ struct GPUSource { enum_preprocess(); } + if (source.find("'")) { + char_literals_preprocess(); + } + + if (source.find("print")) { + string_preprocess(); + } + if (is_from_material_library()) { material_functions_parse(g_functions); } @@ -445,6 +454,187 @@ struct GPUSource { } } + void char_literals_preprocess() + { + const StringRefNull input = source; + std::stringstream output; + int64_t cursor = -1; + int64_t last_pos = 0; + + while (true) { + cursor = find_token(input, '\'', cursor + 1); + if (cursor == -1) { + break; + } + /* Output anything between 2 print statement. */ + output << input.substr(last_pos, cursor - last_pos); + + /* Extract string. */ + int64_t char_start = cursor + 1; + int64_t char_end = find_token(input, '\'', char_start); + CHECK(char_end, input, cursor, "Malformed char literal. Missing ending `'`."); + + StringRef input_char = input.substr(char_start, char_end - char_start); + if (input_char.size() == 0) { + CHECK(-1, input, cursor, "Malformed char literal. Empty character constant"); + } + + uint8_t char_value = input_char[0]; + + if (input_char[0] == '\\') { + if (input_char[1] == 'n') { + char_value = '\n'; + } + else { + CHECK(-1, input, cursor, "Unsupported escaped character"); + } + } + else { + if (input_char.size() > 1) { + CHECK(-1, input, cursor, "Malformed char literal. Multi-character character constant"); + } + } + + char hex[8]; + SNPRINTF(hex, "0x%.2Xu", char_value); + output << hex; + + cursor = last_pos = char_end + 1; + } + /* If nothing has been changed, do not allocate processed_source. */ + if (last_pos == 0) { + return; + } + + if (last_pos != 0) { + output << input.substr(last_pos); + } + processed_source = output.str(); + source = processed_source.c_str(); + } + + /* Replace print(string) by equivalent print_char4() sequence. */ + void string_preprocess() + { + const StringRefNull input = source; + std::stringstream output; + int64_t cursor = -1; + int64_t last_pos = 0; + + while (true) { + cursor = find_keyword(input, "print", cursor + 1); + if (cursor == -1) { + break; + } + + bool do_endl = false; + StringRef func = input.substr(cursor); + if (func.startswith("print(")) { + do_endl = true; + } + else if (func.startswith("print_no_endl(")) { + do_endl = false; + } + else { + continue; + } + + /* Output anything between 2 print statement. */ + output << input.substr(last_pos, cursor - last_pos); + + /* Extract string. */ + int64_t str_start = input.find('(', cursor) + 1; + int64_t semicolon = find_token(input, ';', str_start + 1); + CHECK(semicolon, input, cursor, "Malformed print(). Missing `;` ."); + int64_t str_end = rfind_token(input, ')', semicolon); + if (str_end < str_start) { + CHECK(-1, input, cursor, "Malformed print(). Missing closing `)` ."); + } + + std::stringstream sub_output; + StringRef input_args = input.substr(str_start, str_end - str_start); + + auto print_string = [&](std::string str) -> int { + size_t len_before_pad = str.length(); + /* Pad string to uint size. */ + while (str.length() % 4 != 0) { + str += " "; + } + /* Keep everything in one line to not mess with the shader logs. */ + sub_output << "/* " << str << "*/"; + sub_output << "print_string_start(" << len_before_pad << ");"; + for (size_t i = 0; i < len_before_pad; i += 4) { + uint8_t chars[4] = {*(reinterpret_cast<const uint8_t *>(str.c_str()) + i + 0), + *(reinterpret_cast<const uint8_t *>(str.c_str()) + i + 1), + *(reinterpret_cast<const uint8_t *>(str.c_str()) + i + 2), + *(reinterpret_cast<const uint8_t *>(str.c_str()) + i + 3)}; + if (i + 4 > len_before_pad) { + chars[len_before_pad - i] = '\0'; + } + char uint_hex[12]; + SNPRINTF(uint_hex, "0x%.2X%.2X%.2X%.2Xu", chars[3], chars[2], chars[1], chars[0]); + sub_output << "print_char4(" << StringRefNull(uint_hex) << ");"; + } + return 0; + }; + + const bool print_as_variable = (input_args[0] != '"') && find_token(input_args, ',') == -1; + if (print_as_variable) { + /* Variable or expression debuging. */ + std::string arg = input_args; + /* Pad align most values. */ + while (arg.length() % 4 != 0) { + arg += " "; + } + print_string(arg); + print_string("= "); + sub_output << "print_value(" << input_args << ");"; + } + else { + const std::regex arg_regex( + /* String args. */ + "\"([^\\r\\n\\t\\f\\v\"]+)\"" + /* OR. */ + "|" + /* value args. */ + "[\\s]+([^\\r\\n\\t\\f\\v\"]+),"); + std::smatch args_match; + std::string func_args = input_args; + std::string::const_iterator args_search_start(func_args.cbegin()); + while (std::regex_search(args_search_start, func_args.cend(), args_match, arg_regex)) { + args_search_start = args_match.suffix().first; + std::string arg_string = args_match[1].str(); + std::string arg_val = args_match[2].str(); + + if (arg_string.empty()) { + sub_output << "print_value(" << arg_val << ");"; + } + else { + print_string(arg_string); + } + } + } + + if (do_endl) { + sub_output << "print_newline();"; + } + + output << sub_output.str(); + + cursor = last_pos = str_end + 1; + } + /* If nothing has been changed, do not allocate processed_source. */ + if (last_pos == 0) { + return; + } + + if (last_pos != 0) { + output << input.substr(last_pos); + } + processed_source = output.str(); + source = processed_source.c_str(); + } + #undef find_keyword #undef rfind_keyword #undef find_token |