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#include "rendering_device_binds.h"
Error RDShaderFile::parse_versions_from_text(const String &p_text, OpenIncludeFunction p_include_func, void *p_include_func_userdata) {
Vector<String> lines = p_text.split("\n");
bool reading_versions = false;
bool stage_found[RD::SHADER_STAGE_MAX] = { false, false, false, false, false };
RD::ShaderStage stage = RD::SHADER_STAGE_MAX;
static const char *stage_str[RD::SHADER_STAGE_MAX] = {
"vertex",
"fragment",
"tesselation_control",
"tesselation_evaluation",
"compute"
};
String stage_code[RD::SHADER_STAGE_MAX];
int stages_found = 0;
Map<StringName, String> version_texts;
versions.clear();
base_error = "";
for (int lidx = 0; lidx < lines.size(); lidx++) {
String line = lines[lidx];
{
String ls = line.strip_edges();
if (ls.begins_with("[") && ls.ends_with("]")) {
String section = ls.substr(1, ls.length() - 2).strip_edges();
if (section == "versions") {
if (stages_found) {
base_error = "Invalid shader file, [version] must be the first section found.";
break;
}
reading_versions = true;
} else {
for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
if (section == stage_str[i]) {
if (stage_found[i]) {
base_error = "Invalid shader file, stage appears twice: " + section;
break;
}
stage_found[i] = true;
stages_found++;
stage = RD::ShaderStage(i);
reading_versions = false;
break;
}
}
if (base_error != String()) {
break;
}
}
continue;
}
}
if (reading_versions) {
String l = line.strip_edges();
if (l != "") {
int eqpos = l.find("=");
if (eqpos == -1) {
base_error = "Version syntax is version=\"<defines with C escaping>\".";
break;
}
String version = l.get_slice("=", 0).strip_edges();
if (!version.is_valid_identifier()) {
base_error = "Version names must be valid identifiers, found '" + version + "' instead.";
break;
}
String define = l.get_slice("=", 1).strip_edges();
if (!define.begins_with("\"") || !define.ends_with("\"")) {
base_error = "Version text must be quoted using \"\", instead found '" + define + "'.";
break;
}
define = "\n" + define.substr(1, define.length() - 2).c_unescape() + "\n"; //add newline before and after jsut in case
version_texts[version] = define;
}
} else {
if (stage == RD::SHADER_STAGE_MAX && line.strip_edges() != "") {
base_error = "Text was found that does not belong to a valid section: " + line;
break;
}
if (stage != RD::SHADER_STAGE_MAX) {
if (line.strip_edges().begins_with("#include")) {
if (p_include_func) {
//process include
String include = line.replace("#include", "").strip_edges();
if (!include.begins_with("\"") || !include.ends_with("\"")) {
base_error = "Malformed #include syntax, expected #include \"<path>\", found instad: " + include;
break;
}
include = include.substr(1, include.length() - 2).strip_edges();
String include_text = p_include_func(include, p_include_func_userdata);
if (include_text != String()) {
stage_code[stage] += "\n" + include_text + "\n";
} else {
base_error = "#include failed for file '" + include + "'";
}
} else {
base_error = "#include used, but no include function provided.";
}
} else {
stage_code[stage] += line + "\n";
}
}
}
}
Ref<RDShaderFile> shader_file;
shader_file.instance();
if (base_error == "") {
if (stage_found[RD::SHADER_STAGE_COMPUTE] && stages_found > 1) {
ERR_FAIL_V_MSG(ERR_PARSE_ERROR, "When writing compute shaders, [compute] mustbe the only stage present.");
}
if (version_texts.empty()) {
version_texts[""] = ""; //make sure a default version exists
}
bool errors_found = false;
/* STEP 2, Compile the versions, add to shader file */
for (Map<StringName, String>::Element *E = version_texts.front(); E; E = E->next()) {
Ref<RDShaderBytecode> bytecode;
bytecode.instance();
for (int i = 0; i < RD::SHADER_STAGE_MAX; i++) {
String code = stage_code[i];
if (code == String()) {
continue;
}
code = code.replace("VERSION_DEFINES", E->get());
String error;
Vector<uint8_t> spirv = RenderingDevice::get_singleton()->shader_compile_from_source(RD::ShaderStage(i), code, RD::SHADER_LANGUAGE_GLSL, &error, false);
bytecode->set_stage_bytecode(RD::ShaderStage(i), spirv);
if (error != "") {
error += String() + "\n\nStage '" + stage_str[i] + "' source code: \n\n";
Vector<String> sclines = code.split("\n");
for (int j = 0; j < sclines.size(); j++) {
error += itos(j + 1) + "\t\t" + sclines[j] + "\n";
}
errors_found = true;
}
bytecode->set_stage_compile_error(RD::ShaderStage(i), error);
}
set_bytecode(bytecode, E->key());
}
return errors_found ? ERR_PARSE_ERROR : OK;
} else {
return ERR_PARSE_ERROR;
}
}
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