From d1f27260602903c864b3dbd6857c29ab39e636e0 Mon Sep 17 00:00:00 2001
From: Michael Liebmann <tuxcode.bbg@gmail.com>
Date: Sat, 13 Jul 2013 13:49:47 +0200
Subject: [PATCH] Add Member to change the OSD color

---
 src/gui/color.cpp | 112 ++++++++++++++++++++++++++++++++++++++++++++++
 src/gui/color.h   |  18 ++++++++
 2 files changed, 130 insertions(+)

diff --git a/src/gui/color.cpp b/src/gui/color.cpp
index d4e7e0fad..322dfb896 100644
--- a/src/gui/color.cpp
+++ b/src/gui/color.cpp
@@ -88,3 +88,115 @@ void fadeColor(unsigned char &r, unsigned char &g, unsigned char &b, int fade, b
 	recalcColor(b, fade);
 	protectColor(r,g,b, protect);
 }
+
+unsigned char getBrightnessRGB(fb_pixel_t &color)
+{
+	RgbColor rgb;
+	rgb.r  = (color & 0x00FF0000) >> 16;
+	rgb.g  = (color & 0x0000FF00) >>  8;
+	rgb.b  =  color & 0x000000FF;
+
+	return rgb.r > rgb.g ? (rgb.r > rgb.b ? rgb.r : rgb.b) : (rgb.g > rgb.b ? rgb.g : rgb.b);
+}
+
+fb_pixel_t changeBrightnessRGBRel(fb_pixel_t &color, int br)
+{
+	int br_ = (int)getBrightnessRGB(color);
+	br_ += br;
+	if (br_ < 0) br_ = 0;
+	if (br_ > 255) br_ = 255;
+	return changeBrightnessRGB(color, (unsigned char)br_);
+}
+
+fb_pixel_t changeBrightnessRGB(fb_pixel_t &color, unsigned char br)
+{
+	HsvColor hsv;
+	RgbColor rgb;
+
+	unsigned char tr;
+	tr     = (color & 0xFF000000) >> 24;
+	rgb.r  = (color & 0x00FF0000) >> 16;
+	rgb.g  = (color & 0x0000FF00) >>  8;
+	rgb.b  =  color & 0x000000FF;
+
+	Rgb2Hsv(&rgb, &hsv);
+	hsv.v = br;
+	Hsv2Rgb(&hsv, &rgb);
+
+	return (((tr    << 24) & 0xFF000000) |
+		((rgb.r << 16) & 0x00FF0000) |
+		((rgb.g <<  8) & 0x0000FF00) |
+		((rgb.b      ) & 0x000000FF));
+}
+
+void Hsv2Rgb(HsvColor *hsv, RgbColor *rgb)
+{
+	unsigned char region, remainder, p, q, t;
+
+	if (hsv->s == 0) {
+		rgb->r = hsv->v;
+		rgb->g = hsv->v;
+		rgb->b = hsv->v;
+		return;
+	}
+
+	region = hsv->h / 43;
+	remainder = (hsv->h - (region * 43)) * 6;
+
+	p = (hsv->v * (255 - hsv->s)) >> 8;
+	q = (hsv->v * (255 - ((hsv->s * remainder) >> 8))) >> 8;
+	t = (hsv->v * (255 - ((hsv->s * (255 - remainder)) >> 8))) >> 8;
+
+	switch (region) {
+		case 0:
+			rgb->r = hsv->v; rgb->g = t; rgb->b = p;
+			break;
+		case 1:
+			rgb->r = q; rgb->g = hsv->v; rgb->b = p;
+			break;
+		case 2:
+			rgb->r = p; rgb->g = hsv->v; rgb->b = t;
+			break;
+		case 3:
+			rgb->r = p; rgb->g = q; rgb->b = hsv->v;
+			break;
+		case 4:
+			rgb->r = t; rgb->g = p; rgb->b = hsv->v;
+			break;
+		default:
+			rgb->r = hsv->v; rgb->g = p; rgb->b = q;
+			break;
+	}
+
+	return;
+}
+
+void Rgb2Hsv(RgbColor *rgb, HsvColor *hsv)
+{
+	unsigned char rgbMin, rgbMax;
+
+	rgbMin = rgb->r < rgb->g ? (rgb->r < rgb->b ? rgb->r : rgb->b) : (rgb->g < rgb->b ? rgb->g : rgb->b);
+	rgbMax = rgb->r > rgb->g ? (rgb->r > rgb->b ? rgb->r : rgb->b) : (rgb->g > rgb->b ? rgb->g : rgb->b);
+
+	hsv->v = rgbMax;
+	if (hsv->v == 0) {
+		hsv->h = 0;
+		hsv->s = 0;
+		return;
+	}
+
+	hsv->s = 255 * long(rgbMax - rgbMin) / hsv->v;
+	if (hsv->s == 0) {
+		hsv->h = 0;
+		return;
+	}
+
+	if (rgbMax == rgb->r)
+		hsv->h = 0 + 43 * (rgb->g - rgb->b) / (rgbMax - rgbMin);
+	else if (rgbMax == rgb->g)
+		hsv->h = 85 + 43 * (rgb->b - rgb->r) / (rgbMax - rgbMin);
+	else
+		hsv->h = 171 + 43 * (rgb->r - rgb->g) / (rgbMax - rgbMin);
+
+	return;
+}
diff --git a/src/gui/color.h b/src/gui/color.h
index 7e58324fa..bcffc5b6f 100644
--- a/src/gui/color.h
+++ b/src/gui/color.h
@@ -34,6 +34,7 @@
 #define __color__
 
 #define COL_MAXFREE			254-8*9 - 1
+#include <driver/framebuffer.h>
 #define COL_COLORED_EVENTS_CHANNELLIST	254-8*9
 #define COL_COLORED_EVENTS_INFOBAR	254-8*8
 #define COL_INFOBAR_SHADOW		254-8*7
@@ -98,5 +99,22 @@ int convertSetupAlpha2Alpha(unsigned char alpha);
 
 void fadeColor(unsigned char &r, unsigned char &g, unsigned char &b, int fade, bool protect=true);
 
+typedef struct {
+	unsigned char r;
+	unsigned char g;
+	unsigned char b;
+} RgbColor;
+
+typedef struct {
+	unsigned char h;
+	unsigned char s;
+	unsigned char v;
+} HsvColor;
+
+unsigned char getBrightnessRGB(fb_pixel_t &color);
+fb_pixel_t changeBrightnessRGBRel(fb_pixel_t &color, int br);
+fb_pixel_t changeBrightnessRGB(fb_pixel_t &color, unsigned char br);
+void Hsv2Rgb(HsvColor *hsv, RgbColor *rgb);
+void Rgb2Hsv(RgbColor *rgb, HsvColor *hsv);
 
 #endif