namespace BizHawk.Emulation.Cores.Nintendo.NES { public static class Palettes { static float[] rtmul = { 1.239f, 0.794f, 1.019f, 0.905f, 1.023f, 0.741f, 0.75f }; static float[] gtmul = { 0.915f, 1.086f, 0.98f, 1.026f, 0.908f, 0.987f, 0.75f }; static float[] btmul = { 0.743f, 0.882f, 0.653f, 1.277f, 0.979f, 0.101f, 0.75f }; public static void ApplyDeemphasis(ref int r, ref int g, ref int b, int deemph_bits) { //DEEMPH BITS MAY BE ORDERED WRONG. PLEASE CHECK if (deemph_bits == 0) return; int d = deemph_bits - 1; r = (int)(r * rtmul[d]); g = (int)(g * gtmul[d]); b = (int)(b * btmul[d]); if (r > 0xFF) r = 0xFF; if (g > 0xFF) g = 0xFF; if (b > 0xFF) b = 0xFF; } /// /// Loads a simple 192 byte (64 entry RGB888) or 1536 byte (64*8 = 512 entry) palette. FCEUX uses these, as do almost every NES emulator. /// /// 192 or 1536 bytes, the contents of the palette file public static byte[,] Load_FCEUX_Palette(byte[] fileContents) { int nColors; //'validate' file, solely by length if (fileContents.Length == 1536) { nColors = 512; } else if (fileContents.Length == 192) { nColors = 64; } else { return null; } byte[,] ret = new byte[nColors, 3]; int i = 0; for (int c = 0; c < nColors; c++) { for (int z = 0; z < 3; z++) ret[c, z] = fileContents[i++]; } return ret; } const int SHIFT = 2; public static byte[,] FCEUX_Standard = new byte[,] { { 0x1D<