gfx-shader-param: Add support for automatic parameters

Allows other parameters to be a seed to these parameters.

source/gfx/shader/gfx-shader-param-basic.cpp

@@ -190,6 +190,9 @@ void gfx::shader::bool_parameter::defaults(obs_data_t* settings)
 
 void gfx::shader::bool_parameter::properties(obs_properties_t* props, obs_data_t* settings)
 {
+	if (!is_visible())
+		return;
+
 	// TODO: Support for bool[]
 	if (get_size() == 1) {
 		auto p = obs_properties_add_list(props, get_key().c_str(), get_name().c_str(), OBS_COMBO_TYPE_LIST,
@@ -203,6 +206,9 @@ void gfx::shader::bool_parameter::properties(obs_properties_t* props, obs_data_t
 
 void gfx::shader::bool_parameter::update(obs_data_t* settings)
 {
+	if (is_automatic())
+		return;
+
 	// TODO: Support for bool[]
 	if (get_size() == 1) {
 		_data[0] = static_cast<bool>(obs_data_get_int(settings, get_key().c_str()));
@@ -286,6 +292,9 @@ static inline obs_property_t* build_float_property(gfx::shader::basic_field_type
 
 void gfx::shader::float_parameter::properties(obs_properties_t* props, obs_data_t* settings)
 {
+	if (!is_visible())
+		return;
+
 	auto grp = obs_properties_create();
 	if (get_size() == 1) {
 		auto p = build_float_property(_field_type, props, _keys[0].c_str(), _names[0].c_str(), _min[0].f32, _max[0].f32,
@@ -316,6 +325,9 @@ void gfx::shader::float_parameter::update(obs_data_t* settings)
 
 void gfx::shader::float_parameter::assign()
 {
+	if (is_automatic())
+		return;
+
 	get_parameter().set_value(_data.data(), get_size());
 }
 

source/gfx/shader/gfx-shader-param.cpp

@@ -22,6 +22,7 @@
 
 #define ANNO_ORDER "order"
 #define ANNO_VISIBILITY "visible"
+#define ANNO_AUTOMATIC "automatic"
 #define ANNO_NAME "name"
 #define ANNO_DESCRIPTION "description"
 #define ANNO_TYPE "type"
@@ -118,6 +119,14 @@ gfx::shader::parameter::parameter(gs::effect_parameter param, std::string key_pr
 		_name = (_key);
 	}
 
+	// Read Order
+	if (auto anno = _param.get_annotation(ANNO_VISIBILITY); anno) {
+		_visible = anno.get_default_bool();
+	}
+	if (auto anno = _param.get_annotation(ANNO_AUTOMATIC); anno) {
+		_automatic = anno.get_default_bool();
+	}
+
 	// Read Order
 	if (auto anno = _param.get_annotation(ANNO_ORDER); anno) {
 		_order = anno.get_default_int();
@@ -196,6 +205,11 @@ bool gfx::shader::parameter::is_visible()
 	return true;
 }
 
+bool gfx::shader::parameter::is_automatic()
+{
+	return _automatic;
+}
+
 bool gfx::shader::parameter::has_name()
 {
 	return _name.length() > 0;

source/gfx/shader/gfx-shader-param.hpp

@@ -75,6 +75,7 @@ namespace gfx {
 
 			// Visibility, name and description.
 			bool        _visible;
+			bool _automatic;
 			std::string _name;
 			std::string _description;
 
@@ -104,6 +105,8 @@ namespace gfx {
 
 			bool is_visible();
 
+			bool is_automatic();
+
 			bool has_name();
 
 			const std::string& get_name();

source/gfx/shader/gfx-shader.cpp

@@ -243,8 +243,7 @@ bool gfx::shader::shader::on_properties_modified(obs_properties_t* props, obs_pr
 
 		// Rebuild new parameters.
 		for (auto kv : _shader_params) {
-			if (kv.second->is_visible())
-				kv.second->properties(grp, data);
+			kv.second->properties(grp, data);
 			kv.second->defaults(data);
 			kv.second->update(data);
 		}