Parse colour values as they're read

6 files changed, 76 insertions, 56 deletions

diff --git a/assetFactory/assetFactory.cpp b/assetFactory/assetFactory.cpp
index 016f29e..70f5337 100644
--- a/assetFactory/assetFactory.cpp
+++ b/assetFactory/assetFactory.cpp
@@ -30,12 +30,12 @@ AssetFactory::parseX11RGB(const char * path)
 {
 	filesystem::FileStar rgb {path, "r"};
 	Colours out;
-	glm::u8vec3 colour;
+	Colour colour;
 	char inname[BUFSIZ];
-	while (fscanf(rgb, "%hhu %hhu %hhu %[^\n\r]s", &colour.r, &colour.g, &colour.b, inname) == 4) {
+	while (fscanf(rgb, "%f %f %f %[^\n\r]s", &colour.r, &colour.g, &colour.b, inname) == 4) {
 		std::string name {inname};
 		normalizeColourName(name);
-		out.emplace(std::move(name), colour);
+		out.emplace(std::move(name), colour / 255.f);
 	}
 	return out;
 }
@@ -49,6 +49,32 @@ AssetFactory::normalizeColourName(std::string & name)
 	};
 }
 
+AssetFactory::ColourAlpha
+AssetFactory::parseColour(std::string_view in) const
+{
+	if (in.empty()) {
+		throw std::runtime_error("Empty colour specification");
+	}
+	if (in[0] == '#') {
+		if (in.length() > 9 || in.length() % 2 == 0) {
+			throw std::runtime_error("Invalid hex colour specification");
+		}
+		ColourAlpha out {0, 0, 0, 1};
+		std::generate_n(&out.r, (in.length() - 1) / 2, [in = in.data() + 1]() mutable {
+			uint8_t channel;
+			std::from_chars(in, in + 2, channel, 16);
+			in += 2;
+			return static_cast<float>(channel) / 255.f;
+		});
+		return out;
+	}
+	if (auto mf = std::dynamic_pointer_cast<const AssetFactory>(Persistence::sharedObjects.at("assetFactory"))) {
+		if (const auto colour = mf->colours.find(in); colour != mf->colours.end()) {
+			return {colour->second, 1};
+		}
+	}
+	throw std::runtime_error("No such asset factory colour");
+}
 bool
 AssetFactory::persist(Persistence::PersistenceStore & store)
 {
diff --git a/assetFactory/assetFactory.h b/assetFactory/assetFactory.h
index 42082eb..2bd576b 100644
--- a/assetFactory/assetFactory.h
+++ b/assetFactory/assetFactory.h
@@ -22,11 +22,13 @@ class AssetFactory : public Persistence::Persistable {
 public:
 	using Shapes = std::map<std::string, Shape::Ptr, std::less<>>;
 	using Assets = std::map<std::string, Asset::Ptr, std::less<>>;
-	using Colour = glm::u8vec3;
+	using Colour = glm::vec3;
+	using ColourAlpha = glm::vec4;
 	using Colours = std::map<std::string, Colour, std::less<>>;
 
 	AssetFactory();
 	[[nodiscard]] static std::shared_ptr<AssetFactory> loadXML(const std::filesystem::path &);
+	[[nodiscard]] ColourAlpha parseColour(std::string_view) const;
 
 	Shapes shapes;
 	Assets assets;
diff --git a/assetFactory/modelFactoryMesh.h b/assetFactory/modelFactoryMesh.h
index b4f5254..258913b 100644
--- a/assetFactory/modelFactoryMesh.h
+++ b/assetFactory/modelFactoryMesh.h
@@ -5,6 +5,7 @@
 #include <OpenMesh/Core/Mesh/Traits.hh>
 #include <glm/geometric.hpp>
 #include <glm/vec3.hpp>
+#include <glm/vec4.hpp>
 
 namespace OpenMesh {
 	template<typename Scalar, int DIM> struct glmvec : public VectorT<Scalar, DIM> {
@@ -25,7 +26,7 @@ struct ModelFactoryTraits : public OpenMesh::DefaultTraits {
 	VertexAttributes(OpenMesh::Attributes::Normal | OpenMesh::Attributes::Status);
 	using Point = OpenMesh::glmvec<float, 3>;
 	using Normal = OpenMesh::glmvec<float, 3>;
-	using Color = OpenMesh::glmvec<float, 4>;
+	using Color = glm::vec4;
 };
 
 struct ModelFactoryMesh : public OpenMesh::PolyMesh_ArrayKernelT<ModelFactoryTraits> {
diff --git a/assetFactory/style.cpp b/assetFactory/style.cpp
index d2977a7..b2a2cf7 100644
--- a/assetFactory/style.cpp
+++ b/assetFactory/style.cpp
@@ -1,41 +1,16 @@
 #include "style.h"
 #include "assetFactory.h"
 
-ModelFactoryMesh::Color
-Style::parseColour(const std::string_view & in)
-{
-	if (in.empty()) {
-		throw std::runtime_error("Empty colour specification");
-	}
-	if (in[0] == '#') {
-		if (in.length() > 9 || in.length() % 2 == 0) {
-			throw std::runtime_error("Invalid hex colour specification");
-		}
-		ModelFactoryMesh::Color out {0, 0, 0, 1};
-		std::generate_n(out.begin(), (in.length() - 1) / 2, [in = in.data() + 1]() mutable {
-			uint8_t channel;
-			std::from_chars(in, in + 2, channel, 16);
-			in += 2;
-			return static_cast<float>(channel) / 256.F;
-		});
-		return out;
-	}
-	if (auto mf = std::dynamic_pointer_cast<const AssetFactory>(Persistence::sharedObjects.at("assetFactory"))) {
-		if (const auto colour = mf->colours.find(in); colour != mf->colours.end()) {
-			const auto out = glm::vec3 {colour->second} / 256.F;
-			return {out.r, out.g, out.b, 1.f};
-		}
-	}
-	throw std::runtime_error("No such asset factory colour");
-}
-
 void
 Style::applyStyle(ModelFactoryMesh & mesh, const StyleStack & parents, const Shape::CreatedFaces & faces) const
 {
-	if (const auto effectiveColour = getProperty(parents, &Style::colour); !effectiveColour.empty()) {
-		const auto parsedColour = parseColour(effectiveColour);
+	if (const auto effectiveColour = getProperty(parents, &Style::colour,
+				[](auto && style) {
+					return style->colour.a > 0;
+				});
+			effectiveColour.has_value()) {
 		for (const auto & face : faces) {
-			mesh.set_color(face.second, parsedColour);
+			mesh.set_color(face.second, effectiveColour->get());
 		}
 	}
 }
@@ -43,27 +18,30 @@ Style::applyStyle(ModelFactoryMesh & mesh, const StyleStack & parents, const Sha
 void
 Style::applyStyle(ModelFactoryMesh & mesh, const StyleStack & parents, const ModelFactoryMesh::FaceHandle & face) const
 {
-	if (const auto effectiveColour = getProperty(parents, &Style::colour); !effectiveColour.empty()) {
-		const auto parsedColour = parseColour(effectiveColour);
-		mesh.set_color(face, parsedColour);
-	}
-}
-
-std::string_view
-Style::getProperty(const StyleStack & parents, std::string Style::*member)
-{
-	if (const auto itr = std::find_if(parents.rbegin(), parents.rend(),
-				[&member](auto && s) {
-					return !(s->*member).empty();
+	if (const auto effectiveColour = getProperty(parents, &Style::colour,
+				[](auto && style) {
+					return style->colour.a > 0;
 				});
-			itr != parents.rend()) {
-		return (*itr)->*member;
+			effectiveColour.has_value()) {
+		mesh.set_color(face, effectiveColour->get());
 	}
-	return {};
 }
 
 bool
 Style::persist(Persistence::PersistenceStore & store)
 {
-	return STORE_MEMBER(colour);
+	struct ColourParser : public Persistence::SelectionV<ColourAlpha> {
+		using Persistence::SelectionV<ColourAlpha>::SelectionV;
+		using Persistence::SelectionV<ColourAlpha>::setValue;
+		void
+		setValue(std::string && str) override
+		{
+			if (auto mf
+					= std::dynamic_pointer_cast<const AssetFactory>(Persistence::sharedObjects.at("assetFactory"))) {
+				v = mf->parseColour(str);
+			}
+		}
+	};
+
+	return STORE_HELPER(colour, ColourParser);
 }
diff --git a/assetFactory/style.h b/assetFactory/style.h
index 0c7ad5a..e8fd012 100644
--- a/assetFactory/style.h
+++ b/assetFactory/style.h
@@ -3,19 +3,31 @@
 #include "modelFactoryMesh.h"
 #include "persistence.h"
 #include "shape.h"
+#include <optional>
 #include <string>
+#include <utility>
 
 class Style {
 public:
 	using StyleStack = std::vector<const Style *>;
+	using Colour = glm::vec3;
+	using ColourAlpha = glm::vec4;
 
-	static ModelFactoryMesh::Color parseColour(const std::string_view &);
 	void applyStyle(ModelFactoryMesh &, const StyleStack & parents, const Shape::CreatedFaces &) const;
 	void applyStyle(ModelFactoryMesh &, const StyleStack & parents, const ModelFactoryMesh::FaceHandle &) const;
 
-	static std::string_view getProperty(const StyleStack & parents, std::string Style::*member);
+	template<typename T>
+	static std::optional<std::reference_wrapper<const T>>
+	getProperty(const StyleStack & parents, T Style::*member, auto && test)
+	{
+		if (const auto itr = std::find_if(parents.rbegin(), parents.rend(), std::forward<decltype(test)>(test));
+				itr != parents.rend()) {
+			return (*itr)->*member;
+		}
+		return {};
+	}
 
-	std::string colour;
+	ColourAlpha colour {};
 
 protected:
 	bool persist(Persistence::PersistenceStore & store);
diff --git a/assetFactory/use.cpp b/assetFactory/use.cpp
index a6fac5c..53fc9b9 100644
--- a/assetFactory/use.cpp
+++ b/assetFactory/use.cpp
@@ -18,7 +18,8 @@ struct Lookup : public Persistence::SelectionV<Shape::CPtr> {
 	void
 	setValue(std::string && str) override
 	{
-		if (auto mf = std::dynamic_pointer_cast<const AssetFactory>(Persistence::sharedObjects.at("assetFactory"))) {
+		if (auto mf = std::dynamic_pointer_cast<const AssetFactory>(
+					Persistence::sharedObjects.at("assetFactory"))) {
 			v = mf->shapes.at(str);
 		}
 	}