#include <math/ColorMatrix.h>
#include <utils/Bytes.h>


namespace lime {
	
	
	static int id_buffer;
	static bool init = false;
	
	
	ColorMatrix::ColorMatrix () {
		
		for (int i = 0; i < 20; i++) {
			
			if (i % 6 == 0) {
				
				data[i] = 1;
				
			} else {
				
				data[i] = 0;
				
			}
			
		}
		
	}
	
	
	ColorMatrix::ColorMatrix (value colorMatrix) {
		
		if (!init) {
			
			id_buffer = val_id ("buffer");
			init = true;
			
		}
		
		value buffer_value = val_field (colorMatrix, id_buffer);
		Bytes bytes = Bytes (buffer_value);
		float* src = (float*)bytes.Data ();
		
		for (int i = 0; i < 20; i++) {
			
			data[i] = src[i];
			
		}
		
	}
	
	
	ColorMatrix::~ColorMatrix () {
		
		
		
	}
	
	
	float inline ColorMatrix::GetAlphaMultiplier () {
		
		return data[18];
		
	}
	
	
	float inline ColorMatrix::GetAlphaOffset () {
		
		return data[19] * 255;
		
	}
	
	
	void ColorMatrix::GetAlphaTable (unsigned char* table) {
		
		GetDataTable (table, GetAlphaMultiplier (), GetAlphaOffset ());
		
	}
	
	
	float inline ColorMatrix::GetBlueMultiplier () {
		
		return data[12];
		
	}
	
	
	float inline ColorMatrix::GetBlueOffset () {
		
		return data[14] * 255;
		
	}
	
	
	void ColorMatrix::GetBlueTable (unsigned char* table) {
		
		GetDataTable (table, GetBlueMultiplier (), GetBlueOffset ());
		
	}
	
	
	int32_t inline ColorMatrix::GetColor () {
		
		return ((int (GetRedOffset ()) << 16) | (int (GetGreenOffset ()) << 8) | int (GetBlueOffset ()));
		
	}
	
	
	void inline ColorMatrix::GetDataTable (unsigned char* table, float multiplier, float offset) {
		
		int32_t value;
		
		for (int i = 0; i < 256; i++) {
			
			value = (int)(i * multiplier + offset);
			if (value > 0xFF) value = 0xFF;
			if (value < 0) value = 0;
			table[i] = value;
			
		}
		
	}
	
	
	float inline ColorMatrix::GetGreenMultiplier () {
		
		return data[6];
		
	}
	
	
	float inline ColorMatrix::GetGreenOffset () {
		
		return data[9] * 255;
		
	}
	
	
	void ColorMatrix::GetGreenTable (unsigned char* table) {
		
		GetDataTable (table, GetGreenMultiplier (), GetGreenOffset ());
		
	}
	
	
	float inline ColorMatrix::GetRedMultiplier () {
		
		return data[0];
		
	}
	
	
	float inline ColorMatrix::GetRedOffset () {
		
		return data[4] * 255;
		
	}
	
	
	void ColorMatrix::GetRedTable (unsigned char* table) {
		
		GetDataTable (table, GetRedMultiplier (), GetRedOffset ());
		
	}
	
	
}