145 lines
3.8 KiB
C++
145 lines
3.8 KiB
C++
//
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// Created by Wouter Groeneveld on 28/07/18.
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//
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#include <engine/gba/tonc_memdef.h>
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#include <engine/background/text_stream.h>
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#include "gba_engine.h"
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#include "allocator.h"
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int x = 0;
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void onvblank() {
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REG_IME = 0;
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unsigned short tempInterruptState = REG_IF;
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if((REG_IF & INTERRUPT_VBLANK) == INTERRUPT_VBLANK) {
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// if vblanks_remaning is zero: stop
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//*sound_control &= ~(SOUND_B_RIGHT_CHANNEL | SOUND_B_LEFT_CHANNEL | SOUND_B_FIFO_RESET);
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//*dma2_control = 0;
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// else counter--
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// OR: to restart sound (channelA)
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x++;
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}
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//TextStream::instance() << x;
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REG_IF = tempInterruptState;
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REG_IME = 1;
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}
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void GBAEngine::update() {
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vsync();
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if(sceneToTransitionTo) {
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currentEffectForTransition->update();
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if(currentEffectForTransition->isDone()) {
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setScene(sceneToTransitionTo);
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}
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}
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spriteManager.render();
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u16 keys = readKeys();
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this->currentScene->tick(keys);
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}
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void GBAEngine::transitionIntoScene(Scene *scene, SceneEffect* effect) {
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sceneToTransitionTo = scene;
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currentEffectForTransition = effect;
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currentEffectForTransition->setSceneToAffect(this->currentScene);
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}
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u16 GBAEngine::readKeys() {
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return ~REG_KEYS & KEY_ANY;
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}
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SoundControl GBAEngine::channelAControl() {
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return {
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®_DMA1CNT,
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®_DMA1SAD,
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®_DMA1DAD,
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®_FIFOA,
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SDS_AR | SDS_AL | SDS_ARESET
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};
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}
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SoundControl GBAEngine::channelBControl() {
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return {
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®_DMA2CNT,
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®_DMA2SAD,
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®_DMA2DAD,
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®_FIFOB,
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SDS_BR | SDS_BL | SDS_BRESET
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};
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}
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void GBAEngine::queueSound(const s8 *data, int totalSamples, int sampleRate, SoundControl control) {
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REG_TM0CNT = 0;
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*(control.DMAControl) = 0; // reset previous sound
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REG_SNDDSCNT |= control.ControlFlags; // output to both sides, reset fifo
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REG_SNDSTAT = SSTAT_ENABLE; // enable all sound
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*(control.DMASourceAddress) = (u32) data;
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*(control.DMADestinationAddress) = *(control.FiFoBuffer);
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*(control.DMAControl) = DMA_DST_FIXED | DMA_REPEAT | DMA_32 | DMA_SYNC_TO_TIMER | DMA_ENABLE;
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u16 ticksPerSample = CLOCK / sampleRate; // divide the clock (ticks/second) by the sample rate (samples/second)
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REG_TM0D = OVERFLOW_16_BIT_VALUE - ticksPerSample;
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// channel_a_vblanks_remaining = total_samples * ticks_per_sample * (1.0 / CYCLES_PER_BLANK);
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REG_TM0CNT = TM_ENABLE | TM_FREQ_1; // enable timer - dma auto-syncs to this thanks to DMA_SYNC_TO_TIMER
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}
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GBAEngine::GBAEngine() {
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// setup screen control flags
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REG_DISPCNT = DCNT_MODE0 | DCNT_OBJ | DCNT_OBJ_1D | DCNT_BG0 | DCNT_BG1 | DCNT_BG2 | DCNT_BG3;
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// setup interrupt control flags for vblank IRQing
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REG_DISPSTAT |= DISPLAY_INTERRUPT_VBLANK_ENABLE;
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REG_IE |= INTERRUPT_VBLANK;
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*IRQ_CALLBACK = (u32) &onvblank;
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//REG_IME = 1;
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REG_SNDDSCNT = 0;
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Allocator::free();
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}
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void GBAEngine::cleanupPreviousScene() {
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delete currentScene;
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sceneToTransitionTo = nullptr;
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delete currentEffectForTransition;
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}
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void GBAEngine::setScene(Scene* scene) {
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if(this->currentScene) {
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cleanupPreviousScene();
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TextStream::instance().clear();
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}
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scene->load();
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auto fgPalette = scene->getForegroundPalette();
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if(fgPalette) {
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fgPalette->persist();
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}
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auto bgPalette = scene->getBackgroundPalette();
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if(bgPalette) {
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bgPalette->persist();
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}
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Allocator::free();
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TextStream::instance().persist();
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spriteManager.set(scene->sprites());
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spriteManager.persist();
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for(const auto bg : scene->backgrounds()) {
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bg->persist();
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}
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this->currentScene = scene;
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}
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