Codechange: Split palette handling to separate file.
Peter Nelson
5 months ago
committed by
Peter Nelson
parent
4ecc107d30
commit
daec0e2ca4
@ -0,0 +1,190 @@
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file palette.cpp Handling of palettes. */
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#include "stdafx.h"
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#include "blitter/base.hpp"
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#include "blitter/factory.hpp"
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#include "gfx_type.h"
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#include "landscape_type.h"
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#include "palette_func.h"
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#include "settings_type.h"
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#include "thread.h"
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#include "table/palettes.h"
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#include "safeguards.h"
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Palette _cur_palette;
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byte _colour_gradient[COLOUR_END][8];
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static std::recursive_mutex _palette_mutex; ///< To coordinate access to _cur_palette.
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void DoPaletteAnimations();
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void GfxInitPalettes()
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{
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std::lock_guard<std::recursive_mutex> lock(_palette_mutex);
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memcpy(&_cur_palette, &_palette, sizeof(_cur_palette));
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DoPaletteAnimations();
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}
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/**
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* Copy the current palette if the palette was updated.
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* Used by video-driver to get a current up-to-date version of the palette,
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* to avoid two threads accessing the same piece of memory (with a good chance
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* one is already updating the palette while the other is drawing based on it).
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* @param local_palette The location to copy the palette to.
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* @param force_copy Whether to ignore if there is an update for the palette.
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* @return True iff a copy was done.
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*/
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bool CopyPalette(Palette &local_palette, bool force_copy)
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{
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std::lock_guard<std::recursive_mutex> lock(_palette_mutex);
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if (!force_copy && _cur_palette.count_dirty == 0) return false;
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local_palette = _cur_palette;
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_cur_palette.count_dirty = 0;
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if (force_copy) {
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local_palette.first_dirty = 0;
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local_palette.count_dirty = 256;
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}
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return true;
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}
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#define EXTR(p, q) (((uint16_t)(palette_animation_counter * (p)) * (q)) >> 16)
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#define EXTR2(p, q) (((uint16_t)(~palette_animation_counter * (p)) * (q)) >> 16)
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void DoPaletteAnimations()
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{
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std::lock_guard<std::recursive_mutex> lock(_palette_mutex);
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/* Animation counter for the palette animation. */
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static int palette_animation_counter = 0;
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palette_animation_counter += 8;
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Blitter *blitter = BlitterFactory::GetCurrentBlitter();
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const Colour *s;
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const ExtraPaletteValues *ev = &_extra_palette_values;
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Colour old_val[PALETTE_ANIM_SIZE];
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const uint old_tc = palette_animation_counter;
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uint j;
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if (blitter != nullptr && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
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palette_animation_counter = 0;
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}
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Colour *palette_pos = &_cur_palette.palette[PALETTE_ANIM_START]; // Points to where animations are taking place on the palette
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/* Makes a copy of the current animation palette in old_val,
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* so the work on the current palette could be compared, see if there has been any changes */
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memcpy(old_val, palette_pos, sizeof(old_val));
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/* Fizzy Drink bubbles animation */
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s = ev->fizzy_drink;
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j = EXTR2(512, EPV_CYCLES_FIZZY_DRINK);
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for (uint i = 0; i != EPV_CYCLES_FIZZY_DRINK; i++) {
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*palette_pos++ = s[j];
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j++;
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if (j == EPV_CYCLES_FIZZY_DRINK) j = 0;
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}
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/* Oil refinery fire animation */
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s = ev->oil_refinery;
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j = EXTR2(512, EPV_CYCLES_OIL_REFINERY);
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for (uint i = 0; i != EPV_CYCLES_OIL_REFINERY; i++) {
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*palette_pos++ = s[j];
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j++;
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if (j == EPV_CYCLES_OIL_REFINERY) j = 0;
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}
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/* Radio tower blinking */
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{
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byte i = (palette_animation_counter >> 1) & 0x7F;
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byte v;
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if (i < 0x3f) {
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v = 255;
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} else if (i < 0x4A || i >= 0x75) {
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v = 128;
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} else {
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v = 20;
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}
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palette_pos->r = v;
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palette_pos->g = 0;
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palette_pos->b = 0;
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palette_pos++;
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i ^= 0x40;
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if (i < 0x3f) {
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v = 255;
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} else if (i < 0x4A || i >= 0x75) {
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v = 128;
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} else {
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v = 20;
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}
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palette_pos->r = v;
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palette_pos->g = 0;
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palette_pos->b = 0;
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palette_pos++;
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}
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/* Handle lighthouse and stadium animation */
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s = ev->lighthouse;
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j = EXTR(256, EPV_CYCLES_LIGHTHOUSE);
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for (uint i = 0; i != EPV_CYCLES_LIGHTHOUSE; i++) {
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*palette_pos++ = s[j];
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j++;
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if (j == EPV_CYCLES_LIGHTHOUSE) j = 0;
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}
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/* Dark blue water */
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s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->dark_water_toyland : ev->dark_water;
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j = EXTR(320, EPV_CYCLES_DARK_WATER);
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for (uint i = 0; i != EPV_CYCLES_DARK_WATER; i++) {
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*palette_pos++ = s[j];
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j++;
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if (j == EPV_CYCLES_DARK_WATER) j = 0;
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}
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/* Glittery water */
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s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->glitter_water_toyland : ev->glitter_water;
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j = EXTR(128, EPV_CYCLES_GLITTER_WATER);
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for (uint i = 0; i != EPV_CYCLES_GLITTER_WATER / 3; i++) {
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*palette_pos++ = s[j];
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j += 3;
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if (j >= EPV_CYCLES_GLITTER_WATER) j -= EPV_CYCLES_GLITTER_WATER;
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}
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if (blitter != nullptr && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
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palette_animation_counter = old_tc;
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} else if (_cur_palette.count_dirty == 0 && memcmp(old_val, &_cur_palette.palette[PALETTE_ANIM_START], sizeof(old_val)) != 0) {
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/* Did we changed anything on the palette? Seems so. Mark it as dirty */
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_cur_palette.first_dirty = PALETTE_ANIM_START;
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_cur_palette.count_dirty = PALETTE_ANIM_SIZE;
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}
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}
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/**
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* Determine a contrasty text colour for a coloured background.
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* @param background Background colour.
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* @param threshold Background colour brightness threshold below which the background is considered dark and TC_WHITE is returned, range: 0 - 255, default 128.
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* @return TC_BLACK or TC_WHITE depending on what gives a better contrast.
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*/
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TextColour GetContrastColour(uint8_t background, uint8_t threshold)
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{
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Colour c = _cur_palette.palette[background];
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/* Compute brightness according to http://www.w3.org/TR/AERT#color-contrast.
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* The following formula computes 1000 * brightness^2, with brightness being in range 0 to 255. */
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uint sq1000_brightness = c.r * c.r * 299 + c.g * c.g * 587 + c.b * c.b * 114;
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/* Compare with threshold brightness which defaults to 128 (50%) */
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return sq1000_brightness < ((uint) threshold) * ((uint) threshold) * 1000 ? TC_WHITE : TC_BLACK;
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}
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@ -0,0 +1,79 @@
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file palette_func.h Functions related to palettes. */
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#ifndef PALETTE_FUNC_H
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#define PALETTE_FUNC_H
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#include "gfx_type.h"
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#include "strings_type.h"
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#include "string_type.h"
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extern Palette _cur_palette; ///< Current palette
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bool CopyPalette(Palette &local_palette, bool force_copy = false);
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void GfxInitPalettes();
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/**
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* Checks if a Colours value is valid.
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*
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* @param colours The value to check
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* @return true if the given value is a valid Colours.
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*/
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static inline bool IsValidColours(Colours colours)
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{
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return colours < COLOUR_END;
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}
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TextColour GetContrastColour(uint8_t background, uint8_t threshold = 128);
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/**
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* All 16 colour gradients
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* 8 colours per gradient from darkest (0) to lightest (7)
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*/
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extern byte _colour_gradient[COLOUR_END][8];
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/**
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* Return the colour for a particular greyscale level.
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* @param level Intensity, 0 = black, 15 = white
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* @return colour
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*/
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#define GREY_SCALE(level) (level)
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static const uint8_t PC_BLACK = GREY_SCALE(1); ///< Black palette colour.
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static const uint8_t PC_DARK_GREY = GREY_SCALE(6); ///< Dark grey palette colour.
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static const uint8_t PC_GREY = GREY_SCALE(10); ///< Grey palette colour.
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static const uint8_t PC_WHITE = GREY_SCALE(15); ///< White palette colour.
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static const uint8_t PC_VERY_DARK_RED = 0xB2; ///< Almost-black red palette colour.
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static const uint8_t PC_DARK_RED = 0xB4; ///< Dark red palette colour.
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static const uint8_t PC_RED = 0xB8; ///< Red palette colour.
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static const uint8_t PC_VERY_DARK_BROWN = 0x56; ///< Almost-black brown palette colour.
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static const uint8_t PC_ORANGE = 0xC2; ///< Orange palette colour.
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static const uint8_t PC_YELLOW = 0xBF; ///< Yellow palette colour.
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static const uint8_t PC_LIGHT_YELLOW = 0x44; ///< Light yellow palette colour.
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static const uint8_t PC_VERY_LIGHT_YELLOW = 0x45; ///< Almost-white yellow palette colour.
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static const uint8_t PC_GREEN = 0xD0; ///< Green palette colour.
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static const uint8_t PC_VERY_DARK_BLUE = 0x9A; ///< Almost-black blue palette colour.
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static const uint8_t PC_DARK_BLUE = 0x9D; ///< Dark blue palette colour.
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static const uint8_t PC_LIGHT_BLUE = 0x98; ///< Light blue palette colour.
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static const uint8_t PC_ROUGH_LAND = 0x52; ///< Dark green palette colour for rough land.
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static const uint8_t PC_GRASS_LAND = 0x54; ///< Dark green palette colour for grass land.
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static const uint8_t PC_BARE_LAND = 0x37; ///< Brown palette colour for bare land.
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static const uint8_t PC_RAINFOREST = 0x5C; ///< Pale green palette colour for rainforest.
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static const uint8_t PC_FIELDS = 0x25; ///< Light brown palette colour for fields.
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static const uint8_t PC_TREES = 0x57; ///< Green palette colour for trees.
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static const uint8_t PC_WATER = 0xC9; ///< Dark blue palette colour for water.
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#endif /* PALETTE_FUNC_H */
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