1/* Copyright (c) 2013-2016 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "core.h"
  7
  8#include "core/core.h"
  9#include "gb/gb.h"
 10#include "gb/renderers/software.h"
 11#include "util/memory.h"
 12
 13struct GBCore {
 14	struct mCore d;
 15	struct GBVideoSoftwareRenderer renderer;
 16	uint8_t keys;
 17};
 18
 19static bool _GBCoreInit(struct mCore* core) {
 20	struct GBCore* gbcore = (struct GBCore*) core;
 21
 22	struct LR35902Core* cpu = anonymousMemoryMap(sizeof(struct LR35902Core));
 23	struct GB* gb = anonymousMemoryMap(sizeof(struct GB));
 24	if (!cpu || !gb) {
 25		free(cpu);
 26		free(gb);
 27		return false;
 28	}
 29	core->cpu = cpu;
 30	core->board = gb;
 31
 32	GBCreate(gb);
 33	LR35902SetComponents(cpu, &gb->d, 0, 0);
 34	LR35902Init(cpu);
 35
 36	GBVideoSoftwareRendererCreate(&gbcore->renderer);
 37	GBVideoAssociateRenderer(&gb->video, &gbcore->renderer.d);
 38
 39	gb->keySource = &gbcore->keys;
 40
 41#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 42	mDirectorySetInit(&core->dirs);
 43#endif
 44	
 45	return true;
 46}
 47
 48static void _GBCoreDeinit(struct mCore* core) {
 49	LR35902Deinit(core->cpu);
 50	GBDestroy(core->board);
 51	mappedMemoryFree(core->cpu, sizeof(struct LR35902Core));
 52	mappedMemoryFree(core->board, sizeof(struct GB));
 53#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 54	mDirectorySetDeinit(&core->dirs);
 55#endif
 56}
 57
 58static void _GBCoreSetSync(struct mCore* core, struct mCoreSync* sync) {
 59	struct GB* gb = core->board;
 60	gb->sync = sync;
 61}
 62
 63static void _GBCoreLoadConfig(struct mCore* core) {
 64	UNUSED(core);
 65	// TODO
 66}
 67
 68static void _GBCoreDesiredVideoDimensions(struct mCore* core, unsigned* width, unsigned* height) {
 69	UNUSED(core);
 70	*width = GB_VIDEO_HORIZONTAL_PIXELS;
 71	*height = GB_VIDEO_VERTICAL_PIXELS;
 72}
 73
 74static void _GBCoreSetVideoBuffer(struct mCore* core, color_t* buffer, size_t stride) {
 75	struct GBCore* gbcore = (struct GBCore*) core;
 76	gbcore->renderer.outputBuffer = buffer;
 77	gbcore->renderer.outputBufferStride = stride;
 78}
 79
 80static struct blip_t* _GBCoreGetAudioChannel(struct mCore* core, int ch) {
 81	struct GB* gb = core->board;
 82	switch (ch) {
 83	case 0:
 84		return gb->audio.left;
 85	case 1:
 86		return gb->audio.right;
 87	default:
 88		return NULL;
 89	}
 90}
 91
 92static bool _GBCoreLoadROM(struct mCore* core, struct VFile* vf) {
 93	return GBLoadROM(core->board, vf);
 94}
 95
 96static bool _GBCoreLoadSave(struct mCore* core, struct VFile* vf) {
 97	return GBLoadSave(core->board, vf);
 98}
 99
100static bool _GBCoreLoadPatch(struct mCore* core, struct VFile* vf) {
101	// TODO
102	UNUSED(core);
103	UNUSED(vf);
104	mLOG(GB, STUB, "Patches are not yet supported");
105	return false;
106}
107
108static void _GBCoreUnloadROM(struct mCore* core) {
109	return GBUnloadROM(core->board);
110}
111
112static void _GBCoreReset(struct mCore* core) {
113	LR35902Reset(core->cpu);
114}
115
116static void _GBCoreRunFrame(struct mCore* core) {
117	struct GB* gb = core->board;
118	int32_t frameCounter = gb->video.frameCounter;
119	while (gb->video.frameCounter == frameCounter) {
120		LR35902Run(core->cpu);
121	}
122}
123
124static void _GBCoreRunLoop(struct mCore* core) {
125	LR35902Run(core->cpu);
126}
127
128static void _GBCoreStep(struct mCore* core) {
129	LR35902Tick(core->cpu);
130}
131
132static bool _GBCoreLoadState(struct mCore* core, struct VFile* vf, int flags) {
133	UNUSED(core);
134	UNUSED(vf);
135	UNUSED(flags);
136	// TODO
137	return false;
138}
139
140static bool _GBCoreSaveState(struct mCore* core, struct VFile* vf, int flags) {
141	UNUSED(core);
142	UNUSED(vf);
143	UNUSED(flags);
144	// TODO
145	return false;
146}
147
148static void _GBCoreSetKeys(struct mCore* core, uint32_t keys) {
149	struct GBCore* gbcore = (struct GBCore*) core;
150	gbcore->keys = keys;
151}
152
153static void _GBCoreAddKeys(struct mCore* core, uint32_t keys) {
154	struct GBCore* gbcore = (struct GBCore*) core;
155	gbcore->keys |= keys;
156}
157
158static void _GBCoreClearKeys(struct mCore* core, uint32_t keys) {
159	struct GBCore* gbcore = (struct GBCore*) core;
160	gbcore->keys &= ~keys;
161}
162
163static int32_t _GBCoreFrameCounter(struct mCore* core) {
164	struct GB* gb = core->board;
165	return gb->video.frameCounter;
166}
167
168static int32_t _GBCoreFrameCycles(struct mCore* core) {
169	UNUSED(core);
170	return GB_VIDEO_TOTAL_LENGTH;
171}
172
173static int32_t _GBCoreFrequency(struct mCore* core) {
174	UNUSED(core);
175	// TODO: GB differences
176	return DMG_LR35902_FREQUENCY;
177}
178
179static void _GBCoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
180	struct GB* gb = core->board;
181	gb->memory.rtc = rtc;
182}
183
184struct mCore* GBCoreCreate(void) {
185	struct GBCore* gbcore = malloc(sizeof(*gbcore));
186	struct mCore* core = &gbcore->d;
187	core->cpu = 0;
188	core->board = 0;
189	core->init = _GBCoreInit;
190	core->deinit = _GBCoreDeinit;
191	core->setSync = _GBCoreSetSync;
192	core->loadConfig = _GBCoreLoadConfig;
193	core->desiredVideoDimensions = _GBCoreDesiredVideoDimensions;
194	core->setVideoBuffer = _GBCoreSetVideoBuffer;
195	core->getAudioChannel = _GBCoreGetAudioChannel;
196	core->isROM = GBIsROM;
197	core->loadROM = _GBCoreLoadROM;
198	core->loadSave = _GBCoreLoadSave;
199	core->loadPatch = _GBCoreLoadPatch;
200	core->unloadROM = _GBCoreUnloadROM;
201	core->reset = _GBCoreReset;
202	core->runFrame = _GBCoreRunFrame;
203	core->runLoop = _GBCoreRunLoop;
204	core->step = _GBCoreStep;
205	core->loadState = _GBCoreLoadState;
206	core->saveState = _GBCoreSaveState;
207	core->setKeys = _GBCoreSetKeys;
208	core->addKeys = _GBCoreAddKeys;
209	core->clearKeys = _GBCoreClearKeys;
210	core->frameCounter = _GBCoreFrameCounter;
211	core->frameCycles = _GBCoreFrameCycles;
212	core->frequency = _GBCoreFrequency;
213	core->setRTC = _GBCoreSetRTC;
214	return core;
215}