206 lines
7.6 KiB
C++
206 lines
7.6 KiB
C++
/*************************************************************************/
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/* rendering_device_binds.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "rendering_device_binds.h"
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Error RDShaderFile::parse_versions_from_text(const String &p_text, const String p_defines, OpenIncludeFunction p_include_func, void *p_include_func_userdata) {
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Vector<String> lines = p_text.split("\n");
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bool reading_versions = false;
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bool stage_found[RD::SHADER_STAGE_MAX] = { false, false, false, false, false };
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RD::ShaderStage stage = RD::SHADER_STAGE_MAX;
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static const char *stage_str[RD::SHADER_STAGE_MAX] = {
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"vertex",
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"fragment",
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"tesselation_control",
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"tesselation_evaluation",
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"compute",
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};
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String stage_code[RD::SHADER_STAGE_MAX];
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int stages_found = 0;
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Map<StringName, String> version_texts;
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versions.clear();
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base_error = "";
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for (int lidx = 0; lidx < lines.size(); lidx++) {
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String line = lines[lidx];
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{
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String ls = line.strip_edges();
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if (ls.begins_with("#[") && ls.ends_with("]")) {
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String section = ls.substr(2, ls.length() - 3).strip_edges();
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if (section == "versions") {
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if (stages_found) {
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base_error = "Invalid shader file, #[versions] must be the first section found.";
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break;
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}
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reading_versions = true;
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} else {
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for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
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if (section == stage_str[i]) {
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if (stage_found[i]) {
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base_error = "Invalid shader file, stage appears twice: " + section;
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break;
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}
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stage_found[i] = true;
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stages_found++;
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stage = RD::ShaderStage(i);
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reading_versions = false;
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break;
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}
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}
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if (base_error != String()) {
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break;
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}
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}
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continue;
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}
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}
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if (stage == RD::SHADER_STAGE_MAX && line.strip_edges() != "") {
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line = line.strip_edges();
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if (line.begins_with("//") || line.begins_with("/*")) {
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continue; //assuming comment (single line)
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}
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}
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if (reading_versions) {
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String l = line.strip_edges();
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if (l != "") {
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if (l.find("=") == -1) {
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base_error = "Missing `=` in '" + l + "'. Version syntax is `version = \"<defines with C escaping>\";`.";
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break;
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}
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if (l.find(";") == -1) {
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// We don't require a semicolon per se, but it's needed for clang-format to handle things properly.
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base_error = "Missing `;` in '" + l + "'. Version syntax is `version = \"<defines with C escaping>\";`.";
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break;
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}
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Vector<String> slices = l.get_slice(";", 0).split("=");
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String version = slices[0].strip_edges();
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if (!version.is_valid_identifier()) {
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base_error = "Version names must be valid identifiers, found '" + version + "' instead.";
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break;
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}
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String define = slices[1].strip_edges();
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if (!define.begins_with("\"") || !define.ends_with("\"")) {
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base_error = "Version text must be quoted using \"\", instead found '" + define + "'.";
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break;
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}
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define = "\n" + define.substr(1, define.length() - 2).c_unescape() + "\n"; // Add newline before and after just in case.
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version_texts[version] = define + "\n" + p_defines;
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}
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} else {
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if (stage == RD::SHADER_STAGE_MAX && line.strip_edges() != "") {
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base_error = "Text was found that does not belong to a valid section: " + line;
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break;
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}
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if (stage != RD::SHADER_STAGE_MAX) {
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if (line.strip_edges().begins_with("#include")) {
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if (p_include_func) {
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//process include
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String include = line.replace("#include", "").strip_edges();
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if (!include.begins_with("\"") || !include.ends_with("\"")) {
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base_error = "Malformed #include syntax, expected #include \"<path>\", found instead: " + include;
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break;
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}
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include = include.substr(1, include.length() - 2).strip_edges();
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String include_text = p_include_func(include, p_include_func_userdata);
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if (include_text != String()) {
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stage_code[stage] += "\n" + include_text + "\n";
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} else {
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base_error = "#include failed for file '" + include + "'";
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}
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} else {
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base_error = "#include used, but no include function provided.";
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}
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} else {
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stage_code[stage] += line + "\n";
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}
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}
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}
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}
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Ref<RDShaderFile> shader_file;
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shader_file.instantiate();
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if (base_error == "") {
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if (stage_found[RD::SHADER_STAGE_COMPUTE] && stages_found > 1) {
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ERR_FAIL_V_MSG(ERR_PARSE_ERROR, "When writing compute shaders, [compute] mustbe the only stage present.");
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}
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if (version_texts.is_empty()) {
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version_texts[""] = ""; //make sure a default version exists
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}
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bool errors_found = false;
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/* STEP 2, Compile the versions, add to shader file */
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for (const KeyValue<StringName, String> &E : version_texts) {
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Ref<RDShaderSPIRV> bytecode;
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bytecode.instantiate();
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for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
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String code = stage_code[i];
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if (code == String()) {
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continue;
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}
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code = code.replace("VERSION_DEFINES", E.value);
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String error;
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Vector<uint8_t> spirv = RenderingDevice::get_singleton()->shader_compile_spirv_from_source(RD::ShaderStage(i), code, RD::SHADER_LANGUAGE_GLSL, &error, false);
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bytecode->set_stage_bytecode(RD::ShaderStage(i), spirv);
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if (error != "") {
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error += String() + "\n\nStage '" + stage_str[i] + "' source code: \n\n";
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Vector<String> sclines = code.split("\n");
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for (int j = 0; j < sclines.size(); j++) {
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error += itos(j + 1) + "\t\t" + sclines[j] + "\n";
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}
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errors_found = true;
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}
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bytecode->set_stage_compile_error(RD::ShaderStage(i), error);
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}
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set_bytecode(bytecode, E.key);
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}
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return errors_found ? ERR_PARSE_ERROR : OK;
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} else {
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return ERR_PARSE_ERROR;
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}
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}
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