Disable lights for objects with baked lighting

Don't apply lighting to objects when they have a lightmap texture and
the light is set to BAKE_ALL. This prevents applying the same direct
light twice on the same object and makes setting up scenes with mixed
lighting much easier.

doc/classes/VisualServer.xml

@@ -2152,6 +2152,17 @@
 				Sets whether to use a dual paraboloid or a cubemap for the shadow map. Dual paraboloid is faster but may suffer from artifacts. Equivalent to [member OmniLight.omni_shadow_mode].
 			</description>
 		</method>
+		<method name="light_set_bake_mode">
+			<return type="void">
+			</return>
+			<argument index="0" name="light" type="RID">
+			</argument>
+			<argument index="1" name="bake_mode" type="int" enum="VisualServer.LightBakeMode">
+			</argument>
+			<description>
+				Sets the bake mode for this light, see [enum LightBakeMode] for options. The bake mode affects how the light will be baked in [BakedLightmap]s and [GIProbe]s.
+			</description>
+		</method>
 		<method name="light_set_color">
 			<return type="void">
 			</return>
@@ -2250,7 +2261,7 @@
 			<argument index="1" name="enabled" type="bool">
 			</argument>
 			<description>
-				Sets whether GI probes capture light information from this light.
+				Sets whether GI probes capture light information from this light. [i]Deprecated method.[/i] Use [method light_set_bake_mode] instead. This method is only kept for compatibility reasons and calls [method light_set_bake_mode] internally, setting the bake mode to [constant LIGHT_BAKE_DISABLED] or [constant LIGHT_BAKE_INDIRECT] depending on the given parameter.
 			</description>
 		</method>
 		<method name="lightmap_capture_create">
@@ -4517,6 +4528,12 @@
 		<constant name="LIGHT_PARAM_MAX" value="15" enum="LightParam">
 			Represents the size of the [enum LightParam] enum.
 		</constant>
+		<constant name="LIGHT_BAKE_DISABLED" value="0" enum="LightBakeMode">
+		</constant>
+		<constant name="LIGHT_BAKE_INDIRECT" value="1" enum="LightBakeMode">
+		</constant>
+		<constant name="LIGHT_BAKE_ALL" value="2" enum="LightBakeMode">
+		</constant>
 		<constant name="LIGHT_OMNI_SHADOW_DUAL_PARABOLOID" value="0" enum="LightOmniShadowMode">
 			Use a dual paraboloid shadow map for omni lights.
 		</constant>

drivers/dummy/rasterizer_dummy.h

@@ -491,6 +491,7 @@ class RasterizerStorageDummy : public RasterizerStorage {
 	void light_set_cull_mask(RID p_light, uint32_t p_mask) {}
 	void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) {}
 	void light_set_use_gi(RID p_light, bool p_enabled) {}
+	void light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode) {}
 
 	void light_omni_set_shadow_mode(RID p_light, VS::LightOmniShadowMode p_mode) {}
 	void light_omni_set_shadow_detail(RID p_light, VS::LightOmniShadowDetail p_detail) {}
@@ -511,6 +512,7 @@ class RasterizerStorageDummy : public RasterizerStorage {
 	float light_get_param(RID p_light, VS::LightParam p_param) { return 0.0; }
 	Color light_get_color(RID p_light) { return Color(); }
 	bool light_get_use_gi(RID p_light) { return false; }
+	VS::LightBakeMode light_get_bake_mode(RID p_light) { return VS::LightBakeMode::LIGHT_BAKE_DISABLED; }
 	uint64_t light_get_version(RID p_light) const { return 0; }
 
 	/* PROBE API */

drivers/gles2/rasterizer_scene_gles2.cpp

@@ -2300,6 +2300,9 @@ void RasterizerSceneGLES2::_render_render_list(RenderList::Element **p_elements,
 
 			if (!unshaded && e->light_index < RenderList::MAX_LIGHTS) {
 				light = render_light_instances[e->light_index];
+				if (e->light_mode == LightMode::LIGHTMODE_LIGHTMAP && light->light_ptr->bake_mode == VS::LIGHT_BAKE_ALL) {
+					light = NULL; // Don't use this light, it is already included in the lightmap
+				}
 			}
 
 			if (light != prev_light) {

drivers/gles2/rasterizer_storage_gles2.cpp

@@ -3816,7 +3816,7 @@ RID RasterizerStorageGLES2::light_create(VS::LightType p_type) {
 	light->directional_blend_splits = false;
 	light->directional_range_mode = VS::LIGHT_DIRECTIONAL_SHADOW_DEPTH_RANGE_STABLE;
 	light->reverse_cull = false;
-	light->use_gi = true;
+	light->bake_mode = VS::LIGHT_BAKE_INDIRECT;
 	light->version = 0;
 
 	return light_owner.make_rid(light);
@@ -3905,10 +3905,15 @@ void RasterizerStorageGLES2::light_set_reverse_cull_face_mode(RID p_light, bool
 }
 
 void RasterizerStorageGLES2::light_set_use_gi(RID p_light, bool p_enabled) {
+	WARN_DEPRECATED_MSG("'VisualServer.light_set_use_gi' is deprecated and will be removed in a future version. Use 'VisualServer.light_set_bake_mode' instead.");
+	light_set_bake_mode(p_light, p_enabled ? VS::LightBakeMode::LIGHT_BAKE_INDIRECT : VS::LightBakeMode::LIGHT_BAKE_DISABLED);
+}
+
+void RasterizerStorageGLES2::light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode) {
 	Light *light = light_owner.getornull(p_light);
 	ERR_FAIL_COND(!light);
 
-	light->use_gi = p_enabled;
+	light->bake_mode = p_bake_mode;
 
 	light->version++;
 	light->instance_change_notify(true, false);
@@ -4010,10 +4015,14 @@ Color RasterizerStorageGLES2::light_get_color(RID p_light) {
 }
 
 bool RasterizerStorageGLES2::light_get_use_gi(RID p_light) {
+	return light_get_bake_mode(p_light) != VS::LightBakeMode::LIGHT_BAKE_DISABLED;
+}
+
+VS::LightBakeMode RasterizerStorageGLES2::light_get_bake_mode(RID p_light) {
 	Light *light = light_owner.getornull(p_light);
-	ERR_FAIL_COND_V(!light, false);
+	ERR_FAIL_COND_V(!light, VS::LightBakeMode::LIGHT_BAKE_DISABLED);
 
-	return light->use_gi;
+	return light->bake_mode;
 }
 
 bool RasterizerStorageGLES2::light_has_shadow(RID p_light) const {

drivers/gles2/rasterizer_storage_gles2.h

@@ -932,10 +932,10 @@ class RasterizerStorageGLES2 : public RasterizerStorage {
 		bool shadow;
 		bool negative;
 		bool reverse_cull;
-		bool use_gi;
 
 		uint32_t cull_mask;
 
+		VS::LightBakeMode bake_mode;
 		VS::LightOmniShadowMode omni_shadow_mode;
 		VS::LightOmniShadowDetail omni_shadow_detail;
 
@@ -960,6 +960,7 @@ class RasterizerStorageGLES2 : public RasterizerStorage {
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask);
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled);
 	virtual void light_set_use_gi(RID p_light, bool p_enabled);
+	virtual void light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode);
 
 	virtual void light_omni_set_shadow_mode(RID p_light, VS::LightOmniShadowMode p_mode);
 	virtual void light_omni_set_shadow_detail(RID p_light, VS::LightOmniShadowDetail p_detail);
@@ -980,6 +981,7 @@ class RasterizerStorageGLES2 : public RasterizerStorage {
 	virtual float light_get_param(RID p_light, VS::LightParam p_param);
 	virtual Color light_get_color(RID p_light);
 	virtual bool light_get_use_gi(RID p_light);
+	virtual VS::LightBakeMode light_get_bake_mode(RID p_light);
 
 	virtual AABB light_get_aabb(RID p_light) const;
 	virtual uint64_t light_get_version(RID p_light) const;

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -1849,8 +1849,13 @@ void RasterizerSceneGLES3::_setup_light(RenderList::Element *e, const Transform
 
 		for (int i = 0; i < lc; i++) {
 			LightInstance *li = light_instance_owner.getornull(lights[i]);
-			if (!li || li->last_pass != render_pass) //not visible
-				continue;
+			if (!li || li->last_pass != render_pass) {
+				continue; // Not visible
+			}
+
+			if (e->instance->baked_light && li->light_ptr->bake_mode == VS::LightBakeMode::LIGHT_BAKE_ALL) {
+				continue; // This light is already included in the lightmap
+			}
 
 			if (li && li->light_ptr->type == VS::LIGHT_OMNI) {
 				if (omni_count < maxobj && e->instance->layer_mask & li->light_ptr->cull_mask) {

drivers/gles3/rasterizer_storage_gles3.cpp

@@ -5479,7 +5479,7 @@ RID RasterizerStorageGLES3::light_create(VS::LightType p_type) {
 	light->directional_blend_splits = false;
 	light->directional_range_mode = VS::LIGHT_DIRECTIONAL_SHADOW_DEPTH_RANGE_STABLE;
 	light->reverse_cull = false;
-	light->use_gi = true;
+	light->bake_mode = VS::LIGHT_BAKE_INDIRECT;
 	light->version = 0;
 
 	return light_owner.make_rid(light);
@@ -5572,14 +5572,20 @@ void RasterizerStorageGLES3::light_set_reverse_cull_face_mode(RID p_light, bool
 }
 
 void RasterizerStorageGLES3::light_set_use_gi(RID p_light, bool p_enabled) {
+	WARN_DEPRECATED_MSG("'VisualServer.light_set_use_gi' is deprecated and will be removed in a future version. Use 'VisualServer.light_set_bake_mode' instead.");
+	light_set_bake_mode(p_light, p_enabled ? VS::LightBakeMode::LIGHT_BAKE_INDIRECT : VS::LightBakeMode::LIGHT_BAKE_DISABLED);
+}
+
+void RasterizerStorageGLES3::light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode) {
 	Light *light = light_owner.getornull(p_light);
 	ERR_FAIL_COND(!light);
 
-	light->use_gi = p_enabled;
+	light->bake_mode = p_bake_mode;
 
 	light->version++;
 	light->instance_change_notify(true, false);
 }
+
 void RasterizerStorageGLES3::light_omni_set_shadow_mode(RID p_light, VS::LightOmniShadowMode p_mode) {
 
 	Light *light = light_owner.getornull(p_light);
@@ -5686,10 +5692,14 @@ Color RasterizerStorageGLES3::light_get_color(RID p_light) {
 }
 
 bool RasterizerStorageGLES3::light_get_use_gi(RID p_light) {
+	return light_get_bake_mode(p_light) != VS::LightBakeMode::LIGHT_BAKE_DISABLED;
+}
+
+VS::LightBakeMode RasterizerStorageGLES3::light_get_bake_mode(RID p_light) {
 	Light *light = light_owner.getornull(p_light);
-	ERR_FAIL_COND_V(!light, false);
+	ERR_FAIL_COND_V(!light, VS::LightBakeMode::LIGHT_BAKE_DISABLED);
 
-	return light->use_gi;
+	return light->bake_mode;
 }
 
 bool RasterizerStorageGLES3::light_has_shadow(RID p_light) const {

drivers/gles3/rasterizer_storage_gles3.h

@@ -939,7 +939,7 @@ class RasterizerStorageGLES3 : public RasterizerStorage {
 		bool shadow;
 		bool negative;
 		bool reverse_cull;
-		bool use_gi;
+		VS::LightBakeMode bake_mode;
 		uint32_t cull_mask;
 		VS::LightOmniShadowMode omni_shadow_mode;
 		VS::LightOmniShadowDetail omni_shadow_detail;
@@ -962,6 +962,7 @@ class RasterizerStorageGLES3 : public RasterizerStorage {
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask);
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled);
 	virtual void light_set_use_gi(RID p_light, bool p_enabled);
+	virtual void light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode);
 
 	virtual void light_omni_set_shadow_mode(RID p_light, VS::LightOmniShadowMode p_mode);
 	virtual void light_omni_set_shadow_detail(RID p_light, VS::LightOmniShadowDetail p_detail);
@@ -982,6 +983,7 @@ class RasterizerStorageGLES3 : public RasterizerStorage {
 	virtual float light_get_param(RID p_light, VS::LightParam p_param);
 	virtual Color light_get_color(RID p_light);
 	virtual bool light_get_use_gi(RID p_light);
+	virtual VS::LightBakeMode light_get_bake_mode(RID p_light);
 
 	virtual AABB light_get_aabb(RID p_light) const;
 	virtual uint64_t light_get_version(RID p_light) const;

scene/3d/light.cpp

@@ -159,7 +159,7 @@ PoolVector<Face3> Light::get_faces(uint32_t p_usage_flags) const {
 
 void Light::set_bake_mode(BakeMode p_mode) {
 	bake_mode = p_mode;
-	VS::get_singleton()->light_set_use_gi(light, p_mode != BAKE_DISABLED);
+	VS::get_singleton()->light_set_bake_mode(light, VS::LightBakeMode(bake_mode));
 }
 
 Light::BakeMode Light::get_bake_mode() const {

servers/visual/rasterizer.h

@@ -379,6 +379,7 @@ class RasterizerStorage {
 	virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) = 0;
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0;
 	virtual void light_set_use_gi(RID p_light, bool p_enable) = 0;
+	virtual void light_set_bake_mode(RID p_light, VS::LightBakeMode p_bake_mode) = 0;
 
 	virtual void light_omni_set_shadow_mode(RID p_light, VS::LightOmniShadowMode p_mode) = 0;
 	virtual void light_omni_set_shadow_detail(RID p_light, VS::LightOmniShadowDetail p_detail) = 0;
@@ -399,6 +400,7 @@ class RasterizerStorage {
 	virtual float light_get_param(RID p_light, VS::LightParam p_param) = 0;
 	virtual Color light_get_color(RID p_light) = 0;
 	virtual bool light_get_use_gi(RID p_light) = 0;
+	virtual VS::LightBakeMode light_get_bake_mode(RID p_light) = 0;
 	virtual uint64_t light_get_version(RID p_light) const = 0;
 
 	/* PROBE API */

servers/visual/visual_server_raster.h

@@ -314,6 +314,7 @@ class VisualServerRaster : public VisualServer {
 	BIND2(light_set_cull_mask, RID, uint32_t)
 	BIND2(light_set_reverse_cull_face_mode, RID, bool)
 	BIND2(light_set_use_gi, RID, bool)
+	BIND2(light_set_bake_mode, RID, LightBakeMode)
 
 	BIND2(light_omni_set_shadow_mode, RID, LightOmniShadowMode)
 	BIND2(light_omni_set_shadow_detail, RID, LightOmniShadowDetail)

servers/visual/visual_server_scene.cpp

@@ -3120,7 +3120,7 @@ bool VisualServerScene::_check_gi_probe(Instance *p_gi_probe) {
 
 	for (List<Instance *>::Element *E = p_gi_probe->scenario->directional_lights.front(); E; E = E->next()) {
 
-		if (!VSG::storage->light_get_use_gi(E->get()->base))
+		if (VSG::storage->light_get_bake_mode(E->get()->base) == VS::LightBakeMode::LIGHT_BAKE_DISABLED)
 			continue;
 
 		InstanceGIProbeData::LightCache lc;
@@ -3143,7 +3143,7 @@ bool VisualServerScene::_check_gi_probe(Instance *p_gi_probe) {
 
 	for (Set<Instance *>::Element *E = probe_data->lights.front(); E; E = E->next()) {
 
-		if (!VSG::storage->light_get_use_gi(E->get()->base))
+		if (VSG::storage->light_get_bake_mode(E->get()->base) == VS::LightBakeMode::LIGHT_BAKE_DISABLED)
 			continue;
 
 		InstanceGIProbeData::LightCache lc;

servers/visual/visual_server_wrap_mt.h

@@ -250,6 +250,7 @@ class VisualServerWrapMT : public VisualServer {
 	FUNC2(light_set_cull_mask, RID, uint32_t)
 	FUNC2(light_set_reverse_cull_face_mode, RID, bool)
 	FUNC2(light_set_use_gi, RID, bool)
+	FUNC2(light_set_bake_mode, RID, LightBakeMode)
 
 	FUNC2(light_omni_set_shadow_mode, RID, LightOmniShadowMode)
 	FUNC2(light_omni_set_shadow_detail, RID, LightOmniShadowDetail)

servers/visual_server.cpp

@@ -1772,6 +1772,7 @@ void VisualServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("light_set_cull_mask", "light", "mask"), &VisualServer::light_set_cull_mask);
 	ClassDB::bind_method(D_METHOD("light_set_reverse_cull_face_mode", "light", "enabled"), &VisualServer::light_set_reverse_cull_face_mode);
 	ClassDB::bind_method(D_METHOD("light_set_use_gi", "light", "enabled"), &VisualServer::light_set_use_gi);
+	ClassDB::bind_method(D_METHOD("light_set_bake_mode", "light", "bake_mode"), &VisualServer::light_set_bake_mode);
 
 	ClassDB::bind_method(D_METHOD("light_omni_set_shadow_mode", "light", "mode"), &VisualServer::light_omni_set_shadow_mode);
 	ClassDB::bind_method(D_METHOD("light_omni_set_shadow_detail", "light", "detail"), &VisualServer::light_omni_set_shadow_detail);
@@ -2154,6 +2155,10 @@ void VisualServer::_bind_methods() {
 	BIND_ENUM_CONSTANT(LIGHT_PARAM_SHADOW_BIAS_SPLIT_SCALE);
 	BIND_ENUM_CONSTANT(LIGHT_PARAM_MAX);
 
+	BIND_ENUM_CONSTANT(LIGHT_BAKE_DISABLED);
+	BIND_ENUM_CONSTANT(LIGHT_BAKE_INDIRECT);
+	BIND_ENUM_CONSTANT(LIGHT_BAKE_ALL);
+
 	BIND_ENUM_CONSTANT(LIGHT_OMNI_SHADOW_DUAL_PARABOLOID);
 	BIND_ENUM_CONSTANT(LIGHT_OMNI_SHADOW_CUBE);
 	BIND_ENUM_CONSTANT(LIGHT_OMNI_SHADOW_DETAIL_VERTICAL);

servers/visual_server.h

@@ -442,6 +442,15 @@ class VisualServer : public Object {
 	virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0;
 	virtual void light_set_use_gi(RID p_light, bool p_enable) = 0;
 
+	// bake mode
+	enum LightBakeMode {
+		LIGHT_BAKE_DISABLED,
+		LIGHT_BAKE_INDIRECT,
+		LIGHT_BAKE_ALL
+	};
+
+	virtual void light_set_bake_mode(RID p_light, LightBakeMode p_bake_mode) = 0;
+
 	// omni light
 	enum LightOmniShadowMode {
 		LIGHT_OMNI_SHADOW_DUAL_PARABOLOID,
@@ -1098,6 +1107,7 @@ VARIANT_ENUM_CAST(VisualServer::Features);
 VARIANT_ENUM_CAST(VisualServer::MultimeshTransformFormat);
 VARIANT_ENUM_CAST(VisualServer::MultimeshColorFormat);
 VARIANT_ENUM_CAST(VisualServer::MultimeshCustomDataFormat);
+VARIANT_ENUM_CAST(VisualServer::LightBakeMode);
 VARIANT_ENUM_CAST(VisualServer::LightOmniShadowMode);
 VARIANT_ENUM_CAST(VisualServer::LightOmniShadowDetail);
 VARIANT_ENUM_CAST(VisualServer::LightDirectionalShadowMode);