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Allow pass varyings as out param to the function, when it's possible

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This commit is contained in:
Yuri Roubinsky 2021-12-23 14:04:30 +03:00
parent 1906b59675
commit 108b6a2000
2 changed files with 92 additions and 87 deletions
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170
servers/rendering/shader_language.cpp
View file

@ -977,8 +977,6 @@ void ShaderLanguage::clear() {
completion_base = TYPE_VOID;
completion_base_array = false;
unknown_varying_usages.clear();
#ifdef DEBUG_ENABLED
used_constants.clear();
used_varyings.clear();
@ -4122,43 +4120,6 @@ bool ShaderLanguage::_validate_varying_assign(ShaderNode::Varying &p_varying, St
return true;
}
bool ShaderLanguage::_validate_varying_using(ShaderNode::Varying &p_varying, String *r_message) {
switch (p_varying.stage) {
case ShaderNode::Varying::STAGE_UNKNOWN:
VaryingUsage usage;
usage.var = &p_varying;
usage.line = tk_line;
unknown_varying_usages.push_back(usage);
break;
case ShaderNode::Varying::STAGE_VERTEX:
if (current_function == varying_function_names.fragment || current_function == varying_function_names.light) {
p_varying.stage = ShaderNode::Varying::STAGE_VERTEX_TO_FRAGMENT_LIGHT;
}
break;
case ShaderNode::Varying::STAGE_FRAGMENT:
if (current_function == varying_function_names.light) {
p_varying.stage = ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT;
}
break;
default:
break;
}
return true;
}
bool ShaderLanguage::_check_varying_usages(int *r_error_line, String *r_error_message) const {
for (const List<ShaderLanguage::VaryingUsage>::Element *E = unknown_varying_usages.front(); E; E = E->next()) {
ShaderNode::Varying::Stage stage = E->get().var->stage;
if (stage != ShaderNode::Varying::STAGE_UNKNOWN && stage != ShaderNode::Varying::STAGE_VERTEX && stage != ShaderNode::Varying::STAGE_VERTEX_TO_FRAGMENT_LIGHT) {
*r_error_line = E->get().line;
*r_error_message = RTR("Fragment-stage varying could not been accessed in custom function!");
return false;
}
}
return true;
}
bool ShaderLanguage::_check_node_constness(const Node *p_node) const {
switch (p_node->type) {
case Node::TYPE_OPERATOR: {
@ -4991,55 +4952,104 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
for (int i = 0; i < call_function->arguments.size(); i++) {
int argidx = i + 1;
if (argidx < func->arguments.size()) {
if (call_function->arguments[i].is_const || call_function->arguments[i].qualifier == ArgumentQualifier::ARGUMENT_QUALIFIER_OUT || call_function->arguments[i].qualifier == ArgumentQualifier::ARGUMENT_QUALIFIER_INOUT) {
bool error = false;
Node *n = func->arguments[argidx];
if (n->type == Node::TYPE_CONSTANT || n->type == Node::TYPE_OPERATOR) {
if (!call_function->arguments[i].is_const) {
bool error = false;
Node *n = func->arguments[argidx];
ArgumentQualifier arg_qual = call_function->arguments[i].qualifier;
bool is_out_arg = arg_qual != ArgumentQualifier::ARGUMENT_QUALIFIER_IN;
if (n->type == Node::TYPE_VARIABLE || n->type == Node::TYPE_ARRAY) {
StringName varname;
if (n->type == Node::TYPE_VARIABLE) {
VariableNode *vn = static_cast<VariableNode *>(n);
varname = vn->name;
} else { // TYPE_ARRAY
ArrayNode *an = static_cast<ArrayNode *>(n);
varname = an->name;
}
if (shader->varyings.has(varname)) {
switch (shader->varyings[varname].stage) {
case ShaderNode::Varying::STAGE_UNKNOWN: {
_set_error(vformat("Varying '%s' must be assigned in the vertex or fragment function first!", varname));
return nullptr;
}
case ShaderNode::Varying::STAGE_VERTEX_TO_FRAGMENT_LIGHT:
[[fallthrough]];
case ShaderNode::Varying::STAGE_VERTEX:
if (is_out_arg && current_function != varying_function_names.vertex) { // inout/out
error = true;
}
break;
case ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT:
[[fallthrough]];
case ShaderNode::Varying::STAGE_FRAGMENT:
if (!is_out_arg) {
if (current_function != varying_function_names.fragment && current_function != varying_function_names.light) {
error = true;
}
} else if (current_function != varying_function_names.fragment) { // inout/out
error = true;
}
break;
default:
break;
}
if (error) {
_set_error(vformat("Varying '%s' cannot be passed for the '%s' parameter in that context!", varname, _get_qualifier_str(arg_qual)));
return nullptr;
}
}
}
bool is_const_arg = call_function->arguments[i].is_const;
if (is_const_arg || is_out_arg) {
StringName varname;
if (n->type == Node::TYPE_CONSTANT || n->type == Node::TYPE_OPERATOR || n->type == Node::TYPE_ARRAY_CONSTRUCT) {
if (!is_const_arg) {
error = true;
}
} else if (n->type == Node::TYPE_ARRAY) {
ArrayNode *an = static_cast<ArrayNode *>(n);
if (an->call_expression != nullptr || an->is_const) {
if (!is_const_arg && (an->call_expression != nullptr || an->is_const)) {
error = true;
}
varname = an->name;
} else if (n->type == Node::TYPE_VARIABLE) {
VariableNode *vn = static_cast<VariableNode *>(n);
if (vn->is_const) {
if (vn->is_const && !is_const_arg) {
error = true;
} else {
StringName varname = vn->name;
if (shader->constants.has(varname)) {
error = true;
} else if (shader->uniforms.has(varname)) {
error = true;
} else {
if (shader->varyings.has(varname)) {
_set_error(vformat("Varyings cannot be passed for '%s' parameter!", _get_qualifier_str(call_function->arguments[i].qualifier)));
return nullptr;
}
if (p_function_info.built_ins.has(varname)) {
BuiltInInfo info = p_function_info.built_ins[varname];
if (info.constant) {
error = true;
}
}
}
}
varname = vn->name;
} else if (n->type == Node::TYPE_MEMBER) {
MemberNode *mn = static_cast<MemberNode *>(n);
if (mn->basetype_const) {
if (mn->basetype_const && is_out_arg) {
error = true;
}
}
if (!error && varname != StringName()) {
if (shader->constants.has(varname)) {
error = true;
} else if (shader->uniforms.has(varname)) {
error = true;
} else if (p_function_info.built_ins.has(varname)) {
BuiltInInfo info = p_function_info.built_ins[varname];
if (info.constant) {
error = true;
}
}
}
if (error) {
_set_error(vformat("Constant value cannot be passed for '%s' parameter!", _get_qualifier_str(call_function->arguments[i].qualifier)));
_set_error(vformat("Constant value cannot be passed for '%s' parameter!", _get_qualifier_str(arg_qual)));
return nullptr;
}
}
if (is_sampler_type(call_function->arguments[i].type)) {
//let's see where our argument comes from
Node *n = func->arguments[argidx];
ERR_CONTINUE(n->type != Node::TYPE_VARIABLE); //bug? this should always be a variable
VariableNode *vn = static_cast<VariableNode *>(n);
StringName varname = vn->name;
@ -5143,9 +5153,21 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
return nullptr;
}
} else {
if (!_validate_varying_using(shader->varyings[identifier], &error)) {
_set_error(error);
return nullptr;
ShaderNode::Varying &var = shader->varyings[identifier];
switch (var.stage) {
case ShaderNode::Varying::STAGE_VERTEX:
if (current_function == varying_function_names.fragment || current_function == varying_function_names.light) {
var.stage = ShaderNode::Varying::STAGE_VERTEX_TO_FRAGMENT_LIGHT;
}
break;
case ShaderNode::Varying::STAGE_FRAGMENT:
if (current_function == varying_function_names.light) {
var.stage = ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT;
}
break;
default:
break;
}
}
}
@ -8958,14 +8980,6 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
tk = _get_token();
}
int error_line;
String error_message;
if (!_check_varying_usages(&error_line, &error_message)) {
_set_tkpos({ 0, error_line });
_set_error(error_message);
return ERR_PARSE_ERROR;
}
return OK;
}

9
servers/rendering/shader_language.h
View file

@ -938,14 +938,6 @@ private:
VaryingFunctionNames varying_function_names;
struct VaryingUsage {
ShaderNode::Varying *var;
int line;
};
List<VaryingUsage> unknown_varying_usages;
bool _check_varying_usages(int *r_error_line, String *r_error_message) const;
TkPos _get_tkpos() {
TkPos tkp;
tkp.char_idx = char_idx;
@ -1047,7 +1039,6 @@ private:
bool _propagate_function_call_sampler_uniform_settings(StringName p_name, int p_argument, TextureFilter p_filter, TextureRepeat p_repeat);
bool _propagate_function_call_sampler_builtin_reference(StringName p_name, int p_argument, const StringName &p_builtin);
bool _validate_varying_assign(ShaderNode::Varying &p_varying, String *r_message);
bool _validate_varying_using(ShaderNode::Varying &p_varying, String *r_message);
bool _check_node_constness(const Node *p_node) const;
Node *_parse_array_size(BlockNode *p_block, const FunctionInfo &p_function_info, int &r_array_size);