From 31dd927c43f72e76ecb61ea02a7832698b7a9496 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Nusser?= <andre.nusser@googlemail.com>
Date: Sat, 9 Jun 2018 17:37:23 +0200
Subject: Add map to get instrument name from colour.

---
 plugingui/colour.h      |  9 +++++++++
 plugingui/drumkittab.cc | 15 +++++++++++----
 plugingui/drumkittab.h  |  2 ++
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/plugingui/colour.h b/plugingui/colour.h
index 3a135fc..232b0b9 100644
--- a/plugingui/colour.h
+++ b/plugingui/colour.h
@@ -54,4 +54,13 @@ private:
 	std::array<float, 4> data;
 };
 
+struct ColourHasher
+{
+	// TODO: replace by something reasonable
+	std::size_t operator()(const Colour& colour) const
+	{
+		return 7*colour.red() + 11*colour.green() + 13*colour.blue() + 17*colour.alpha();
+	}
+};
+
 } // GUI::
diff --git a/plugingui/drumkittab.cc b/plugingui/drumkittab.cc
index 91fc801..1dccb52 100644
--- a/plugingui/drumkittab.cc
+++ b/plugingui/drumkittab.cc
@@ -88,14 +88,14 @@ void DrumkitTab::triggerAudition(int x, int y)
 {
 	auto map_colour = map_image->getPixel(x, y);
 
-	// TODO: convert color to instrument
-	if (map_colour != Colour(0))
+	auto it = colour_to_instrument.find(map_colour);
+	if (it == colour_to_instrument.end())
 	{
 		return;
 	}
 
 	++settings.audition_counter;
-	settings.audition_instrument = "Snare";
+	settings.audition_instrument = it->second;
 	settings.audition_velocity = current_velocity;
 }
 
@@ -106,11 +106,18 @@ void DrumkitTab::updateVelocityLabel()
 	velocity_label.setText("Velocity: " + stream.str());
 }
 
-// FIXME: this should actually be done somewhere else maybe?
 void DrumkitTab::loadImageFiles(std::string const& image_file, std::string const& map_file)
 {
 	drumkit_image = std::make_unique<Image>(image_file);
 	map_image = std::make_unique<Image>(map_file);
+
+	// TODO: actually use mapping from drumkit file here
+	colour_to_instrument = {
+		{Colour(0), "Snare"},
+		{Colour(255./255, 15./255, 55./255), "KdrumL"},
+		{Colour(154./255, 153./255, 33./255), "HihatClosed"},
+		{Colour(248./255, 221./255, 37./255), "Tom4"}
+	};
 }
 
 } // GUI::
diff --git a/plugingui/drumkittab.h b/plugingui/drumkittab.h
index c53d3f5..5fe234a 100644
--- a/plugingui/drumkittab.h
+++ b/plugingui/drumkittab.h
@@ -26,6 +26,7 @@
  */
 #pragma once
 
+#include <unordered_map>
 #include <memory>
 #include <string>
 
@@ -59,6 +60,7 @@ public:
 
 private:
 	float current_velocity = .5;
+	std::unordered_map<Colour, std::string, ColourHasher> colour_to_instrument;
 
 	std::unique_ptr<Image> drumkit_image;
 	std::unique_ptr<Image> map_image;
-- 
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