PixelFilterPlugins/xbr.cpp at master · daelsepara/PixelFilterPlugins · GitHub

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#define _USE_MATH_DEFINES
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <cstring>

#include "includes/FilterCommon.h"
#include "includes/xbr.h"

extern "C"
{
	static unsigned char* ScaledImage = NULL;

	const int FilterID = 0x5D06;
	const char* FilterName = "XBR nX";
	const char* FilterDescription = "XBRnX family of filters by Hyllian";

	bool ComparisonThreshold = false;
	int FilterScaleX = 2;
	int FilterScaleY = 2;

	#include "includes/Init.h"

	void Apply(int argc, void** argv)
	{
		if (argc >= 4)
		{
			auto Input = ((unsigned char*)(argv[0]));
			auto srcx = *((int*)(argv[1]));
			auto srcy = *((int*)(argv[2]));
			auto scale = *((int*)(argv[3]));

			scale = scale < 2 ? 2 : scale;
			scale = scale > 4 ? 4 : scale;

			FilterScaleX = scale;
			FilterScaleY = scale;

			Init(srcx, srcy);

			int P[17];

			for (auto y = 0; y < srcy; y++)
			{
				for (auto x = 0; x < srcx; x++)
				{
					// Pixel mapping schemes for 2, 3, 4x

					// x2
					/*
				   	   A1 B1 C1
					A0 PA PB PC C4    P1 P2
					D0 PD PE PF F4 => --+--
					G0 PG PH PI I4    P3 P4
				   	   G5 H5 I5
					*/

					// x3
					/*
					   A1 B1 C1
					A0 PA PB PC C4    P1 P2 P3
					D0 PD PE PF F4 => P4 P5 P6
					G0 PG PH PI I4    P7 P8 P9
					   G5 H5 I5
					*/

					// x4
					/*
					   A1 B1 C1       P01|P02|P03|P04
					A0 PA PB PC C4    P05|P06|P07|p08
					D0 PD PE PF F4 => ---+---+---+---
					G0 PG PH PI I4    P09|P10|P11|p12
					   G5 H5 I5       P13|P14|P15|p16
					*/

					auto a1 = CLR(Input, srcx, srcy, x, y, -1, -2);
					auto b1 = CLR(Input, srcx, srcy, x, y, 0, -2);
					auto c1 = CLR(Input, srcx, srcy, x, y, 1, -2);

					auto a0 = CLR(Input, srcx, srcy, x, y, -2, -1);
					auto pa = CLR(Input, srcx, srcy, x, y, -1, -1);
					auto pb = CLR(Input, srcx, srcy, x, y, 0, -1);
					auto pc = CLR(Input, srcx, srcy, x, y, 1, -1);
					auto c4 = CLR(Input, srcx, srcy, x, y, 2, -1);

					auto d0 = CLR(Input, srcx, srcy, x, y, -2, 0);
					auto pd = CLR(Input, srcx, srcy, x, y, -1, 0);
					auto pe = CLR(Input, srcx, srcy, x, y, 0, 0);
					auto pf = CLR(Input, srcx, srcy, x, y, 1, 0);
					auto f4 = CLR(Input, srcx, srcy, x, y, 2, 0);

					auto g0 = CLR(Input, srcx, srcy, x, y, -2, 1);
					auto pg = CLR(Input, srcx, srcy, x, y, -1, 1);
					auto ph = CLR(Input, srcx, srcy, x, y, 0, 1);
					auto pi = CLR(Input, srcx, srcy, x, y, 1, 1);
					auto i4 = CLR(Input, srcx, srcy, x, y, 2, 1);

					auto g5 = CLR(Input, srcx, srcy, x, y, -1, 2);
					auto h5 = CLR(Input, srcx, srcy, x, y, 0, 2);
					auto i5 = CLR(Input, srcx, srcy, x, y, 1, 2);

					switch(scale)
					{
						case 3: // x3

							P[1] = P[2] = P[3] = P[4] = P[5] = P[6] = P[7] = P[8] = P[9] = pe;

							_Kernel3X(pe, pi, ph, pf, pg, pc, pd, pb, f4, i4, h5, i5, &P[3], &P[6], &P[7], &P[8], &P[9], AllowAlphaBlending, UseOriginalImplementation);
							_Kernel3X(pe, pc, pf, pb, pi, pa, ph, pd, b1, c1, f4, c4, &P[1], &P[2], &P[9], &P[6], &P[3], AllowAlphaBlending, UseOriginalImplementation);
							_Kernel3X(pe, pa, pb, pd, pc, pg, pf, ph, d0, a0, b1, a1, &P[7], &P[4], &P[3], &P[2], &P[1], AllowAlphaBlending, UseOriginalImplementation);
							_Kernel3X(pe, pg, pd, ph, pa, pi, pb, pf, h5, g5, d0, g0, &P[9], &P[8], &P[1], &P[4], &P[7], AllowAlphaBlending, UseOriginalImplementation);

							for (auto Pixel = 1; Pixel < 10; Pixel++)
							{
								Write9RGB(ScaledImage, srcx, srcy, x, y, Pixel, P[Pixel]);
							}

							break;

						case 4: // x4

							P[1] = P[2] = P[3] = P[4] = P[5] = P[6] = P[7] = P[8] = pe;
							P[9] = P[10] = P[11] = P[12] = P[13] = P[14] = P[15] = P[16] = pe;

							_Kernel4Xv2(pe, pi, ph, pf, pg, pc, pd, pb, f4, i4, h5, i5, &P[16], &P[15], &P[12], &P[4], &P[8], &P[11], &P[14], &P[13], AllowAlphaBlending);
							_Kernel4Xv2(pe, pc, pf, pb, pi, pa, ph, pd, b1, c1, f4, c4, &P[4], &P[8], &P[3], &P[1], &P[2], &P[7], &P[12], &P[16], AllowAlphaBlending);
							_Kernel4Xv2(pe, pa, pb, pd, pc, pg, pf, ph, d0, a0, b1, a1, &P[1], &P[2], &P[5], &P[13], &P[9], &P[6], &P[3], &P[4], AllowAlphaBlending);
							_Kernel4Xv2(pe, pg, pd, ph, pa, pi, pb, pf, h5, g5, d0, g0, &P[13], &P[9], &P[14], &P[16], &P[15], &P[10], &P[5], &P[1], AllowAlphaBlending);

							for (auto Pixel = 1; Pixel < 17; Pixel++)
							{
								Write16RGB(ScaledImage, srcx, srcy, x, y, Pixel, P[Pixel]);
							}

							break;

						default: // x2

							P[1] = P[2] = P[3] = P[4] = pe;

							_Kernel2Xv5(pe, pi, ph, pf, pg, pc, pd, pb, f4, i4, h5, i5, &P[2], &P[3], &P[4], AllowAlphaBlending);
							_Kernel2Xv5(pe, pc, pf, pb, pi, pa, ph, pd, b1, c1, f4, c4, &P[1], &P[4], &P[2], AllowAlphaBlending);
							_Kernel2Xv5(pe, pa, pb, pd, pc, pg, pf, ph, d0, a0, b1, a1, &P[3], &P[2], &P[1], AllowAlphaBlending);
							_Kernel2Xv5(pe, pg, pd, ph, pa, pi, pb, pf, h5, g5, d0, g0, &P[4], &P[1], &P[3], AllowAlphaBlending);

							for (auto Pixel = 1; Pixel < 5; Pixel++)
							{
								Write4RGB(ScaledImage, srcx, srcy, x, y, Pixel, P[Pixel]);
							}

							break;
					}
				}
			}
		}
	}
}