8 files changed, 43 insertions, 2 deletions
diff --git a/src/industry_cmd.cpp b/src/industry_cmd.cpp
index fd8387e2d..abb41e6db 100644
--- a/src/industry_cmd.cpp
+++ b/src/industry_cmd.cpp
@@ -2722,8 +2722,17 @@ void InitializeIndustries()
  */
 bool IndustrySpec::IsRawIndustry() const
 {
-	/* Lumber mills are extractive/organic, but can always be built like a non-raw industry */
-	return (this->life_type & (INDUSTRYLIFE_EXTRACTIVE | INDUSTRYLIFE_ORGANIC)) != 0 &&
+	return (this->life_type & (INDUSTRYLIFE_EXTRACTIVE | INDUSTRYLIFE_ORGANIC)) != 0;
+}
+
+/**
+ * Is an industry with the spec a processing industry?
+ * @return true if it should be handled as a processing industry
+ */
+bool IndustrySpec::IsProcessingIndustry() const
+{
+	/* Lumber mills are neither raw nor processing */
+	return (this->life_type & INDUSTRYLIFE_PROCESSING) != 0 &&
 			(this->behaviour & INDUSTRYBEH_CUT_TREES) == 0;
 }
 
diff --git a/src/industrytype.h b/src/industrytype.h
index 8aa566e7a..81025482a 100644
--- a/src/industrytype.h
+++ b/src/industrytype.h
@@ -136,6 +136,7 @@ struct IndustrySpec {
 	GRFFileProps grf_prop;                ///< properties related to the grf file
 
 	bool IsRawIndustry() const;
+	bool IsProcessingIndustry() const;
 	Money GetConstructionCost() const;
 	Money GetRemovalCost() const;
 	bool UsesSmoothEconomy() const;
diff --git a/src/script/api/ai/ai_industrytype.hpp.sq b/src/script/api/ai/ai_industrytype.hpp.sq
index fe84b70f9..7c56acee9 100644
--- a/src/script/api/ai/ai_industrytype.hpp.sq
+++ b/src/script/api/ai/ai_industrytype.hpp.sq
@@ -29,6 +29,7 @@ void SQAIIndustryType_Register(Squirrel *engine)
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetProducedCargo,      "GetProducedCargo",      2, ".i");
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetAcceptedCargo,      "GetAcceptedCargo",      2, ".i");
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::IsRawIndustry,         "IsRawIndustry",         2, ".i");
+	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::IsProcessingIndustry,  "IsProcessingIndustry",  2, ".i");
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::ProductionCanIncrease, "ProductionCanIncrease", 2, ".i");
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetConstructionCost,   "GetConstructionCost",   2, ".i");
 	SQAIIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::CanBuildIndustry,      "CanBuildIndustry",      2, ".i");
diff --git a/src/script/api/ai_changelog.hpp b/src/script/api/ai_changelog.hpp
index 7161d9a3d..fda888c0c 100644
--- a/src/script/api/ai_changelog.hpp
+++ b/src/script/api/ai_changelog.hpp
@@ -22,6 +22,7 @@
  * API additions:
  * \li AIEventExclusiveTransportRights
  * \li AIEventRoadReconstruction
+ * \li AIIndustryType::IsProcessingIndustry
  * \li AIStation::IsAirportClosed
  * \li AIStation::OpenCloseAirport
  *
diff --git a/src/script/api/game/game_industrytype.hpp.sq b/src/script/api/game/game_industrytype.hpp.sq
index 66425a512..460cc513c 100644
--- a/src/script/api/game/game_industrytype.hpp.sq
+++ b/src/script/api/game/game_industrytype.hpp.sq
@@ -29,6 +29,7 @@ void SQGSIndustryType_Register(Squirrel *engine)
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetProducedCargo,      "GetProducedCargo",      2, ".i");
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetAcceptedCargo,      "GetAcceptedCargo",      2, ".i");
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::IsRawIndustry,         "IsRawIndustry",         2, ".i");
+	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::IsProcessingIndustry,  "IsProcessingIndustry",  2, ".i");
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::ProductionCanIncrease, "ProductionCanIncrease", 2, ".i");
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::GetConstructionCost,   "GetConstructionCost",   2, ".i");
 	SQGSIndustryType.DefSQStaticMethod(engine, &ScriptIndustryType::CanBuildIndustry,      "CanBuildIndustry",      2, ".i");
diff --git a/src/script/api/game_changelog.hpp b/src/script/api/game_changelog.hpp
index 46da1d4f8..8948822e4 100644
--- a/src/script/api/game_changelog.hpp
+++ b/src/script/api/game_changelog.hpp
@@ -25,6 +25,7 @@
  * \li GSEventExclusiveTransportRights
  * \li GSEventRoadReconstruction
  * \li GSNews::NT_ACCIDENT, GSNews::NT_COMPANY_INFO, GSNews::NT_ADVICE, GSNews::NT_ACCEPTANCE
+ * \li GSIndustryType::IsProcessingIndustry
  * \li GSStation::IsAirportClosed
  * \li GSStation::OpenCloseAirport
  *
diff --git a/src/script/api/script_industrytype.cpp b/src/script/api/script_industrytype.cpp
index 26a93cda1..7db905829 100644
--- a/src/script/api/script_industrytype.cpp
+++ b/src/script/api/script_industrytype.cpp
@@ -32,6 +32,13 @@
 	return ::GetIndustrySpec(industry_type)->IsRawIndustry();
 }
 
+/* static */ bool ScriptIndustryType::IsProcessingIndustry(IndustryType industry_type)
+{
+	if (!IsValidIndustryType(industry_type)) return false;
+
+	return ::GetIndustrySpec(industry_type)->IsProcessingIndustry();
+}
+
 /* static */ bool ScriptIndustryType::ProductionCanIncrease(IndustryType industry_type)
 {
 	if (!IsValidIndustryType(industry_type)) return false;
diff --git a/src/script/api/script_industrytype.hpp b/src/script/api/script_industrytype.hpp
index 1d642ac38..de5180c43 100644
--- a/src/script/api/script_industrytype.hpp
+++ b/src/script/api/script_industrytype.hpp
@@ -65,13 +65,33 @@ public:
 
 	/**
 	 * Is this industry type a raw industry?
+	 * Raw industries usually produce cargo without any prerequisites.
+	 * ("Usually" means that advanced NewGRF industry concepts might not fit the "raw"/"processing"
+	 * classification, so it's up to the interpretation of the NewGRF author.)
 	 * @param industry_type The type of the industry.
 	 * @pre IsValidIndustryType(industry_type).
 	 * @return True if it should be handled as a raw industry.
+	 * @note Industries might be neither raw nor processing.
+	 *       This is usually the case for industries which produce nothing (e.g. power plants),
+	 *       but also for weird industries like temperate banks and tropic lumber mills.
 	 */
 	static bool IsRawIndustry(IndustryType industry_type);
 
 	/**
+	 * Is this industry type a processing industry?
+	 * Processing industries usually produce cargo when delivered with input cargo.
+	 * ("Usually" means that advanced NewGRF industry concepts might not fit the "raw"/"processing"
+	 * classification, so it's up to the interpretation of the NewGRF author.)
+	 * @param industry_type The type of the industry.
+	 * @pre IsValidIndustryType(industry_type).
+	 * @return True if it is a processing industry.
+	 * @note Industries might be neither raw nor processing.
+	 *       This is usually the case for industries which produce nothing (e.g. power plants),
+	 *       but also for weird industries like temperate banks and tropic lumber mills.
+	 */
+	static bool IsProcessingIndustry(IndustryType industry_type);
+
+	/**
 	 * Can the production of this industry increase?
 	 * @param industry_type The type of the industry.
 	 * @pre IsValidIndustryType(industry_type).