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177 lines
3.8 KiB
C
177 lines
3.8 KiB
C
/**
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@file platform_pokitto.h
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This is Pokitto implementation of the game front end, using the official
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PokittoLib.
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by Miloslav Ciz (drummyfish), 2019
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Released under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
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plus a waiver of all other intellectual property. The goal of this work is
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be and remain completely in the public domain forever, available for any use
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whatsoever.
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*/
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#ifndef _SFG_PLATFORM_H
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#define _SFG_PLATFORM_H
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#include "settings.h"
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#undef SFG_FPS
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#define SFG_FPS 50
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#undef SFG_SCREEN_RESOLUTION_X
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#define SFG_SCREEN_RESOLUTION_X 110
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#undef SFG_SCREEN_RESOLUTION_Y
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#define SFG_SCREEN_RESOLUTION_Y 88
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#undef SFG_RESOLUTION_SCALEDOWN
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#define SFG_RESOLUTION_SCALEDOWN 1
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#undef SFG_DITHERED_SHADOW
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#define SFG_DITHERED_SHADOW 0
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#undef SFG_FOG_DIMINISH_STEP
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#define SFG_FOG_DIMINISH_STEP 2048
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#undef SFG_RAYCASTING_MAX_STEPS
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#define SFG_RAYCASTING_MAX_STEPS 20
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#undef SFG_RAYCASTING_MAX_HITS
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#define SFG_RAYCASTING_MAX_HITS 6
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#undef SFG_RAYCASTING_SUBSAMPLE
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#define SFG_RAYCASTING_SUBSAMPLE 2
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#include "Pokitto.h"
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#include "clock_11u6x.h"
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#include "timer_11u6x.h"
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#include "palette.h"
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#include "sounds.h"
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Pokitto::Core pokitto;
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uint8_t *pokittoScreen;
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void SFG_setPixel(uint16_t x, uint16_t y, uint8_t colorIndex)
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{
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pokittoScreen[y * SFG_SCREEN_RESOLUTION_X + x] = colorIndex;
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}
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uint32_t SFG_getTimeMs()
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{
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return pokitto.getTime();
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}
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void SFG_sleepMs(uint16_t timeMs)
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{
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}
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int8_t SFG_keyPressed(uint8_t key)
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{
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switch (key)
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{
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case SFG_KEY_UP: return pokitto.upBtn(); break;
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case SFG_KEY_RIGHT: return pokitto.rightBtn(); break;
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case SFG_KEY_DOWN: return pokitto.downBtn(); break;
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case SFG_KEY_LEFT: return pokitto.leftBtn(); break;
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case SFG_KEY_A: return pokitto.aBtn(); break;
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case SFG_KEY_B: return pokitto.bBtn(); break;
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case SFG_KEY_C: return pokitto.cBtn(); break;
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default: return 0; break;
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}
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}
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void SFG_getMouseOffset(int16_t *x, int16_t *y)
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{
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*x = 0;
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*y = 0;
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}
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uint8_t audioBuff[SFG_SFX_SAMPLE_COUNT];
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uint16_t audioPos = 0;
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void onTimer() // for sound
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{
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if (Chip_TIMER_MatchPending(LPC_TIMER32_0, 1))
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{
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Chip_TIMER_ClearMatch(LPC_TIMER32_0, 1);
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Pokitto::dac_write(audioBuff[audioPos]);
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audioBuff[audioPos] = 127;
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audioPos = (audioPos + 1) % SFG_SFX_SAMPLE_COUNT;
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}
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}
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void timerInit(uint32_t samplingRate)
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{
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Chip_TIMER_Init(LPC_TIMER32_0);
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Chip_TIMER_Reset(LPC_TIMER32_0);
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Chip_TIMER_MatchEnableInt(LPC_TIMER32_0, 1);
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Chip_TIMER_SetMatch(LPC_TIMER32_0, 1,
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(Chip_Clock_GetSystemClockRate() / samplingRate));
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Chip_TIMER_ResetOnMatchEnable(LPC_TIMER32_0, 1);
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Chip_TIMER_Enable(LPC_TIMER32_0);
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#define weirdNumber ((IRQn_Type) 18)
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NVIC_ClearPendingIRQ(weirdNumber);
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NVIC_SetVector(weirdNumber, (uint32_t) &onTimer);
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NVIC_EnableIRQ(weirdNumber);
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#undef weirdNumber
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}
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void SFG_playSound(uint8_t soundIndex, uint8_t volume)
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{
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uint8_t volumeStep = volume / 16;
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uint16_t pos = audioPos;
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for (int i = 0; i < SFG_SFX_SAMPLE_COUNT; ++i)
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{
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int16_t mixedValue =
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audioBuff[pos] - 127 + SFG_GET_SFX_SAMPLE(soundIndex,i) * volumeStep;
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mixedValue = (mixedValue > 0) ? ((mixedValue < 255) ? mixedValue : 255) : 0;
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audioBuff[pos] = mixedValue;// SFG_GET_SFX_SAMPLE(soundIndex,i) * volumeStep;
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pos = (pos < SFG_SFX_SAMPLE_COUNT - 1) ? (pos + 1) : 0;
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}
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}
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int main()
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{
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pokitto.begin();
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timerInit(8000);
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for (uint16_t i = 0; i < SFG_SFX_SAMPLE_COUNT; ++i)
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audioBuff[i] = 127;
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pokitto.setFrameRate(255);
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pokitto.display.setFont(fontTiny);
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pokitto.display.persistence = 1;
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pokitto.display.setInvisibleColor(-1);
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pokitto.display.load565Palette(paletteRGB565);
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pokittoScreen = pokitto.display.screenbuffer;
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SFG_init();
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while (pokitto.isRunning())
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{
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if (pokitto.update())
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{
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SFG_mainLoopBody();
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}
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}
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return 0;
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}
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#endif // guard
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