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Merge pull request #93590 from Chaosus/shader_custom_func_discard
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Allow usage of `discard` inside custom shader functions
This commit is contained in:
Yuri Rubinsky 2024-10-24 09:38:10 +03:00 committed by GitHub
commit ff9fb0abea
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GPG Key ID: B5690EEEBB952194
2 changed files with 18 additions and 8 deletions
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23
servers/rendering/shader_language.cpp
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@ -356,7 +356,7 @@ const ShaderLanguage::KeyWord ShaderLanguage::keyword_list[] = {
{ TK_CF_BREAK, "break", CF_BLOCK, {}, {} },
{ TK_CF_CONTINUE, "continue", CF_BLOCK, {}, {} },
{ TK_CF_RETURN, "return", CF_BLOCK, {}, {} },
{ TK_CF_DISCARD, "discard", CF_BLOCK, { "particles", "sky", "fog" }, { "fragment" } },
{ TK_CF_DISCARD, "discard", CF_BLOCK, { "particles", "sky", "fog" }, { "vertex" } },
// function specifier keywords
@ -8599,6 +8599,11 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
block = block->parent_block;
}
} else if (tk.type == TK_CF_DISCARD) {
if (!is_discard_supported) {
_set_error(vformat(RTR("Use of '%s' is not supported for the '%s' shader type."), "discard", shader_type_identifier));
return ERR_PARSE_ERROR;
}
//check return type
BlockNode *b = p_block;
while (b && !b->parent_function) {
@ -8610,7 +8615,7 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
}
if (!b->parent_function->can_discard) {
_set_error(vformat(RTR("Use of '%s' is not allowed here."), "discard"));
_set_error(vformat(RTR("'%s' cannot be used within the '%s' processor function."), "discard", b->parent_function->name));
return ERR_PARSE_ERROR;
}
@ -8619,6 +8624,9 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
pos = _get_tkpos();
tk = _get_token();
calls_info[b->parent_function->name].uses_restricted_items.push_back(Pair<StringName, CallInfo::Item>("discard", CallInfo::Item(CallInfo::Item::ITEM_TYPE_BUILTIN, pos)));
if (tk.type != TK_SEMICOLON) {
_set_expected_after_error(";", "discard");
return ERR_PARSE_ERROR;
@ -8856,7 +8864,9 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
ShaderNode::Uniform::Scope uniform_scope = ShaderNode::Uniform::SCOPE_LOCAL;
stages = &p_functions;
is_supported_frag_only_funcs = shader_type_identifier == "canvas_item" || shader_type_identifier == "spatial" || shader_type_identifier == "sky";
is_discard_supported = shader_type_identifier == "canvas_item" || shader_type_identifier == "spatial";
is_supported_frag_only_funcs = is_discard_supported || shader_type_identifier == "sky";
const FunctionInfo &constants = p_functions.has("constants") ? p_functions["constants"] : FunctionInfo();
@ -10350,6 +10360,8 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
if (p_functions.has(name)) {
func_node->can_discard = p_functions[name].can_discard;
} else {
func_node->can_discard = is_discard_supported; // Allow use it for custom functions (in supported shader types).
}
if (!function_overload_count.has(name)) {
@ -10940,10 +10952,7 @@ Error ShaderLanguage::complete(const String &p_code, const ShaderCompileInfo &p_
break; // Ignore hint keywords (parsed below).
}
if (keyword_list[i].flags & keyword_completion_context) {
if (keyword_list[i].excluded_shader_types.has(shader_type_identifier)) {
continue;
}
if (!keyword_list[i].functions.is_empty() && !keyword_list[i].functions.has(current_function)) {
if (keyword_list[i].excluded_shader_types.has(shader_type_identifier) || keyword_list[i].excluded_functions.has(current_function)) {
continue;
}
ScriptLanguage::CodeCompletionOption option(keyword_list[i].text, ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);

3
servers/rendering/shader_language.h
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@ -935,7 +935,7 @@ private:
const char *text;
uint32_t flags;
const Vector<String> excluded_shader_types;
const Vector<String> functions;
const Vector<String> excluded_functions;
};
static const KeyWord keyword_list[];
@ -1151,6 +1151,7 @@ private:
const HashMap<StringName, FunctionInfo> *stages = nullptr;
bool is_supported_frag_only_funcs = false;
bool is_discard_supported = false;
bool _get_completable_identifier(BlockNode *p_block, CompletionType p_type, StringName &identifier);
static const BuiltinFuncDef builtin_func_defs[];