// Copyright (c) 2009-2010, Niels Martin Hansen
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/// @file audio_colorscheme.cpp
/// @ingroup audio_ui
///
/// Manage colour schemes for the audio display

#include "config.h"

#include <algorithm>

#include "audio_colorscheme.h"

#include "audio_rendering_style.h"
#include "colorspace.h"
#include "main.h"

#include <libaegisub/exception.h>

AudioColorScheme::AudioColorScheme(int prec, std::string const& scheme_name, int audio_rendering_style)
: palette((3<<prec) + 3)
, factor(1<<prec)
{
	std::string opt_base = "Colour/Schemes/" + scheme_name + "/";
	switch (static_cast<AudioRenderingStyle>(audio_rendering_style))
	{
		case AudioStyle_Normal:   opt_base += "Normal/"; break;
		case AudioStyle_Inactive: opt_base += "Inactive/"; break;
		case AudioStyle_Selected: opt_base += "Selection/"; break;
		case AudioStyle_Primary:  opt_base += "Primary/"; break;
		default: throw agi::InternalError("Unknown audio rendering styling", 0);
	}

	double h_base  = OPT_GET(opt_base + "Hue Offset")->GetDouble();
	double h_scale = OPT_GET(opt_base + "Hue Scale")->GetDouble();
	double s_base  = OPT_GET(opt_base + "Saturation Offset")->GetDouble();
	double s_scale = OPT_GET(opt_base + "Saturation Scale")->GetDouble();
	double l_base  = OPT_GET(opt_base + "Lightness Offset")->GetDouble();
	double l_scale = OPT_GET(opt_base + "Lightness Scale")->GetDouble();

	for (size_t i = 0; i <= factor; ++i)
	{
		float t = (float)i / factor;
		hsl_to_rgb(
			mid<int>(0, h_base + t * h_scale, 255),
			mid<int>(0, s_base + t * s_scale, 255),
			mid<int>(0, l_base + t * l_scale, 255),
			&palette[i * 3 + 0],
			&palette[i * 3 + 1],
			&palette[i * 3 + 2]);
	}
}