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https://github.com/OpenRCT2/OpenRCT2
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108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#include <algorithm>
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#include <cmath>
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#include "../drawing/Drawing.h"
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#include "../sprites.h"
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#include "Colour.h"
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rct_colour_map ColourMapA[COLOUR_COUNT] = { 0 };
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enum
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{
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INDEX_COLOUR_0 = 243,
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INDEX_COLOUR_1 = 245,
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INDEX_DARKEST = 245,
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INDEX_DARKER = 246,
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INDEX_DARK = 247,
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INDEX_MID_DARK = 248,
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INDEX_MID_LIGHT = 249,
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INDEX_LIGHT = 250,
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INDEX_LIGHTER = 251,
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INDEX_LIGHTEST = 252,
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INDEX_COLOUR_10 = 253,
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INDEX_COLOUR_11 = 254,
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};
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void colours_init_maps()
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{
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// Get colour maps from g1
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for (sint32 i = 0; i < COLOUR_COUNT; i++)
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{
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const rct_g1_element * g1 = gfx_get_g1_element(SPR_PALETTE_2_START + i);
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if (g1 != nullptr)
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{
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ColourMapA[i].colour_0 = g1->offset[INDEX_COLOUR_0];
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ColourMapA[i].colour_1 = g1->offset[INDEX_COLOUR_1];
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ColourMapA[i].darkest = g1->offset[INDEX_DARKEST];
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ColourMapA[i].darker = g1->offset[INDEX_DARKER];
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ColourMapA[i].dark = g1->offset[INDEX_DARK];
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ColourMapA[i].mid_dark = g1->offset[INDEX_MID_DARK];
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ColourMapA[i].mid_light = g1->offset[INDEX_MID_LIGHT];
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ColourMapA[i].light = g1->offset[INDEX_LIGHT];
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ColourMapA[i].lighter = g1->offset[INDEX_LIGHTER];
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ColourMapA[i].lightest = g1->offset[INDEX_LIGHTEST];
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ColourMapA[i].colour_10 = g1->offset[INDEX_COLOUR_10];
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ColourMapA[i].colour_11 = g1->offset[INDEX_COLOUR_11];
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}
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}
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}
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#ifndef NO_TTF
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static uint8 BlendColourMap[PALETTE_COUNT][PALETTE_COUNT] = {0};
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static uint8 findClosestPaletteIndex(uint8 red, uint8 green, uint8 blue)
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{
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sint16 closest = -1;
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sint32 closestDistance = INT32_MAX;
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for (int i = PALETTE_INDEX_0; i < PALETTE_INDEX_230; i++)
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{
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const sint32 distance =
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std::pow(gPalette[i].red - red, 2) + std::pow(gPalette[i].green - green, 2) + std::pow(gPalette[i].blue - blue, 2);
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if (distance < closestDistance)
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{
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closest = i;
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closestDistance = distance;
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}
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}
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return closest;
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}
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uint8 blendColours(const uint8 paletteIndex1, const uint8 paletteIndex2)
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{
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const uint8 cMin = std::min(paletteIndex1, paletteIndex2);
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const uint8 cMax = std::max(paletteIndex1, paletteIndex2);
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if (BlendColourMap[cMin][cMax] != 0)
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{
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return BlendColourMap[cMin][cMax];
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}
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uint8 red = (gPalette[cMin].red + gPalette[cMax].red) / 2;
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uint8 green = (gPalette[cMin].green + gPalette[cMax].green) / 2;
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uint8 blue = (gPalette[cMin].blue + gPalette[cMax].blue) / 2;
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BlendColourMap[cMin][cMax] = findClosestPaletteIndex(red, green, blue);
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return BlendColourMap[cMin][cMax];
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}
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#endif
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