X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Fscene.h;h=4e1181bbf4cf9f504625d5eae9708db79a057ba1;hb=27f5ea8eddf09244887498b61403cc8d725664ad;hp=bdd5d7c78c924aa561567ff55a74a42492406cc0;hpb=83b3d508575124fb83c823ca2439f728d43c7647;p=nageru

diff --git a/nageru/scene.h b/nageru/scene.h
index bdd5d7c..4e1181b 100644
--- a/nageru/scene.h
+++ b/nageru/scene.h
@@ -13,6 +13,7 @@
 // (directly to screen, RGBA) or live (Y'CbCr output).
 
 #include <stddef.h>
+#include <bitset>
 #include <functional>
 #include <map>
 #include <memory>
@@ -77,13 +78,36 @@ struct Block {
 	size_t cardinality_base = 0;
 
 	// Find the chosen alternative for this block in a given instance.
-	size_t chosen_alternative(size_t chain_idx) const {
-		return (chain_idx / cardinality_base) % alternatives.size();
+	int chosen_alternative(size_t chain_idx) const {
+		if (chain_idx == size_t(-1)) {
+			return currently_chosen_alternative;
+		} else {
+			return (chain_idx / cardinality_base) % alternatives.size();
+		}
 	}
 
 	std::vector<EffectBlueprint *> alternatives;  // Must all have the same amount of inputs. Pointers to make things easier for Lua.
 	std::vector<Index> inputs;  // One for each input of alternatives[0] (ie., typically 0 or 1, occasionally 2).
+
+	// If any of these effects are disabled (IdentityEffect chosen)
+	// or enabled (not chosen) as determined by <condition>, so should this one.
+	struct Disabler {
+		Index block_idx;
+		enum {
+			DISABLE_IF_OTHER_DISABLED,
+
+			// This a promise from the user; ie., we don't disable automatically
+			// (see comments in find_disabled_blocks()).
+			DISABLE_IF_OTHER_ENABLED
+		} condition;
+		std::string declaration_point;  // For error messages.
+	};
+	std::vector<Disabler> disablers;
 	int currently_chosen_alternative = 0;
+	// What alternative to use if the block is disabled.
+	// Points to an alternative with IDENTITY_EFFECT if it exists
+	// (to disable as much as possible), otherwise 0.
+	int canonical_alternative = 0;
 	bool is_input = false;
 
 	// For LIVE_INPUT* only. We can't just always populate signal_to_connect,
@@ -105,6 +129,12 @@ struct Block {
 	std::map<std::string, float> float_parameters;
 	std::map<std::string, std::array<float, 3>> vec3_parameters;
 	std::map<std::string, std::array<float, 4>> vec4_parameters;
+
+	std::string declaration_point;  // For error messages.
+
+	// Only for AUTO_WHITE_BALANCE_EFFECT. Points to the parent block with is_input = true,
+	// so that we know which signal to get the white balance from.
+	const Block *white_balance_controller_block = nullptr;
 };
 
 int Block_display(lua_State* L);
@@ -112,6 +142,8 @@ int Block_choose(lua_State* L);
 int Block_enable(lua_State *L);
 int Block_enable_if(lua_State *L);
 int Block_disable(lua_State *L);
+int Block_always_disable_if_disabled(lua_State *L);
+int Block_promise_to_disable_if_enabled(lua_State *L);
 int Block_set_int(lua_State *L);
 int Block_set_float(lua_State *L);
 int Block_set_vec3(lua_State *L);
@@ -133,8 +165,32 @@ private:
 	movit::ResourcePool *resource_pool;
 
 	movit::Effect *instantiate_effects(const Block *block, size_t chain_idx, Instantiation *instantiation);
-	size_t compute_chain_number_for_block(size_t block_idx) const;
-	static void find_inputs_for_block(lua_State *L, Scene *scene, Block *block);
+	size_t compute_chain_number_for_block(size_t block_idx, const std::bitset<256> &disabled) const;
+	static void find_inputs_for_block(lua_State *L, Scene *scene, Block *block, int first_input_idx = 3);
+	static Block *find_block_from_arg(lua_State *L, Scene *scene, int idx);
+
+	// Find out which blocks (indexed by position in the “blocks” array),
+	// if any, are disabled in a given instantiation. A disabled block is
+	// one that will not be instantiated at all, because it is a secondary
+	// (ie., not the first) input of some multi-input effect that was replaced
+	// with IdentityEffect in the given instantiation.
+	//
+	// Set chain_idx to size_t(-1) to use whatever is in each block's
+	// currently_chosen_alternative.
+	std::bitset<256> find_disabled_blocks(size_t chain_idx) const;
+	void find_disabled_blocks(size_t chain_idx, size_t block_idx, bool currently_disabled, std::bitset<256> *disabled) const;
+
+	// If a block is disabled, it should always have canonical_alternative chosen,
+	// so that we don't instantiate a bunch of irrelevant duplicates that
+	// differ only in disabled blocks. You can check this property with
+	// is_noncanonical_chain() and then avoid instantiating the ones where
+	// it returns true.
+	bool is_noncanonical_chain(size_t chain_idx) const;
+
+	// For a given block, find any parents it may have that are inputs.
+	// If there is more than one, throws an error. If there are zero,
+	// returns nullptr (should probably also be an error).
+	const Block *find_root_input_block(lua_State *L, const Block *block);
 
 public:
 	Scene(Theme *theme, float aspect_nom, float aspect_denom);
@@ -146,6 +202,7 @@ public:
 	static int add_input(lua_State *L);
 	static int add_effect(lua_State *L);
 	static int add_optional_effect(lua_State *L);
+	static int add_auto_white_balance(lua_State *L);
 	static int finalize(lua_State *L);
 };