From ac164afa0954e28b521dc6b19d2ccf0320cc8ed1 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Tue, 8 Apr 2014 05:17:27 +0200
Subject: utils/colors: move colors into subdir, add hsv

All color classes are now in an own subdirectory with a short name.
The new class HsvColor represents the Hue/Saturation/Value color model and
comes with conversion functions to and from rgb colors (currently integer
arithmetic without optimization for higher presicion).
---
 src/utils/color/rgb.cpp | 171 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 src/utils/color/rgb.cpp

(limited to 'src/utils/color/rgb.cpp')

diff --git a/src/utils/color/rgb.cpp b/src/utils/color/rgb.cpp
new file mode 100644
index 00000000..c43b85c4
--- /dev/null
+++ b/src/utils/color/rgb.cpp
@@ -0,0 +1,171 @@
+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include <cstddef>
+
+#include "rgb.hpp"
+#include "hsv.hpp"
+
+namespace usdx
+{
+	RgbColor::RgbColor(uint8_t red, uint8_t green, uint8_t blue)
+		: red(red), green(green), blue(blue),
+		  array(NULL), array_length(0)
+	{
+	}
+
+	RgbColor::RgbColor(const uint32_t color)
+		: red((color & 0xff0000) >> 16), green((color & 0xff00) >> 8),
+		  blue(color & 0xff), array(NULL), array_length(0)
+	{
+	}
+
+	RgbColor::RgbColor(const RgbColor& color)
+		: red(color.red), green(color.green), blue(color.blue), array(NULL),
+		  array_length(0)
+	{
+	}
+
+	RgbColor::RgbColor(const HsvColor& hsv)
+		: red(0), green(0), blue(0), array(NULL), array_length(0)
+	{
+		uint8_t region, fpart, p, q, t;
+
+		if(hsv.get_saturation() == 0) {
+			/* color is grayscale */
+			red = green = blue = hsv.get_value();
+			return;
+		}
+
+		/* make hue 0-5 */
+		region = hsv.get_value() / 43;
+
+		/* find remainder part, make it from 0-255 */
+		fpart = (hsv.get_value() - (region * 43)) * 6;
+
+		/* calculate temp vars, doing integer multiplication */
+		p = (hsv.get_value() * (255 - hsv.get_saturation())) >> 8;
+		q = (hsv.get_value() * (255 - ((hsv.get_saturation() * fpart) >> 8))) >> 8;
+		t = (hsv.get_value() * (255 - ((hsv.get_saturation() * (255 - fpart)) >> 8))) >> 8;
+
+		/* assign temp vars based on color cone region */
+		switch(region) {
+        case 0:
+            red = hsv.get_value(); green = t; blue = p; break;
+        case 1:
+            red = q; green = hsv.get_value(); blue = p; break;
+        case 2:
+            red = p; green = hsv.get_value(); blue = t; break;
+        case 3:
+            red = p; green = q; blue = hsv.get_value(); break;
+        case 4:
+            red = t; green = p; blue = hsv.get_value(); break;
+        default:
+            red = hsv.get_value(); green = p; blue = q; break;
+		}
+	}
+
+	RgbColor::~RgbColor()
+	{
+		if (array != NULL) {
+			delete[] array;
+			array = NULL;
+		}
+	}
+
+	RgbColor& RgbColor::operator=(const RgbColor& color)
+	{
+		if (this != &color) {
+			red = color.red;
+			green = color.green;
+			blue = color.blue;
+			array_length = 0;
+
+			if (array != NULL) {
+				delete[] array;
+				array = NULL;
+			}
+		}
+
+		return *this;
+	}
+
+	uint8_t RgbColor::get_red(void) const
+	{
+		return red;
+	}
+
+	uint8_t RgbColor::get_green(void) const
+	{
+		return green;
+	}
+
+	uint8_t RgbColor::get_blue(void) const
+	{
+		return blue;
+	}
+
+	const GLubyte* RgbColor::get_array(size_t len) const
+	{
+		if (array_length != len && array != NULL) {
+			delete[] array;
+			array = NULL;
+			array_length = 0;
+		}
+
+		if (array == NULL) {
+			int components = get_array_comonent_count();
+			array = new GLubyte[len * components];
+			array_length = len;
+
+			for (size_t i = 0; i < len; i++) {
+				array[i*components] = red;
+				array[(i*components) + 1] = green;
+				array[(i*components) + 2] = blue;
+			}
+		}
+
+		return array;
+	}
+
+	int RgbColor::get_array_comonent_count(void) const
+	{
+		return 3;
+	}
+
+	bool RgbColor::is_grey(void) const
+	{
+		return (red == green) && (green == blue);
+	}
+
+	bool RgbColor::is_black(void) const
+	{
+		return (red == 0) && (green == 0) && (blue == 0);
+	}
+
+	bool RgbColor::is_white(void) const
+	{
+		return (red == 255) && (green == 255) && (blue == 255);
+	}
+};
-- 
cgit v1.2.3