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#include "util/patch.h"
 13
 14struct GBCore {
 15	struct mCore d;
 16	struct GBVideoSoftwareRenderer renderer;
 17	uint8_t keys;
 18};
 19
 20static bool _GBCoreInit(struct mCore* core) {
 21	struct GBCore* gbcore = (struct GBCore*) core;
 22
 23	struct LR35902Core* cpu = anonymousMemoryMap(sizeof(struct LR35902Core));
 24	struct GB* gb = anonymousMemoryMap(sizeof(struct GB));
 25	if (!cpu || !gb) {
 26		free(cpu);
 27		free(gb);
 28		return false;
 29	}
 30	core->cpu = cpu;
 31	core->board = gb;
 32
 33	GBCreate(gb);
 34	LR35902SetComponents(cpu, &gb->d, 0, 0);
 35	LR35902Init(cpu);
 36
 37	GBVideoSoftwareRendererCreate(&gbcore->renderer);
 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 void _GBCoreGetVideoBuffer(struct mCore* core, color_t** buffer, size_t* stride) {
 81	struct GBCore* gbcore = (struct GBCore*) core;
 82	*buffer = gbcore->renderer.outputBuffer;
 83	*stride = gbcore->renderer.outputBufferStride;
 84}
 85
 86static struct blip_t* _GBCoreGetAudioChannel(struct mCore* core, int ch) {
 87	struct GB* gb = core->board;
 88	switch (ch) {
 89	case 0:
 90		return gb->audio.left;
 91	case 1:
 92		return gb->audio.right;
 93	default:
 94		return NULL;
 95	}
 96}
 97
 98static bool _GBCoreLoadROM(struct mCore* core, struct VFile* vf) {
 99	return GBLoadROM(core->board, vf);
100}
101
102static bool _GBCoreLoadSave(struct mCore* core, struct VFile* vf) {
103	return GBLoadSave(core->board, vf);
104}
105
106static bool _GBCoreLoadPatch(struct mCore* core, struct VFile* vf) {
107	if (!vf) {
108		return false;
109	}
110	struct Patch patch;
111	if (!loadPatch(vf, &patch)) {
112		return false;
113	}
114	GBApplyPatch(core->board, &patch);
115	return true;
116}
117
118static void _GBCoreUnloadROM(struct mCore* core) {
119	return GBUnloadROM(core->board);
120}
121
122static void _GBCoreReset(struct mCore* core) {
123	struct GBCore* gbcore = (struct GBCore*) core;
124	struct GB* gb = (struct GB*) core->board;
125	GBVideoAssociateRenderer(&gb->video, &gbcore->renderer.d);
126	LR35902Reset(core->cpu);
127}
128
129static void _GBCoreRunFrame(struct mCore* core) {
130	struct GB* gb = core->board;
131	int32_t frameCounter = gb->video.frameCounter;
132	while (gb->video.frameCounter == frameCounter) {
133		LR35902Run(core->cpu);
134	}
135}
136
137static void _GBCoreRunLoop(struct mCore* core) {
138	LR35902Run(core->cpu);
139}
140
141static void _GBCoreStep(struct mCore* core) {
142	LR35902Tick(core->cpu);
143}
144
145static bool _GBCoreLoadState(struct mCore* core, struct VFile* vf, int flags) {
146	UNUSED(core);
147	UNUSED(vf);
148	UNUSED(flags);
149	// TODO
150	return false;
151}
152
153static bool _GBCoreSaveState(struct mCore* core, struct VFile* vf, int flags) {
154	UNUSED(core);
155	UNUSED(vf);
156	UNUSED(flags);
157	// TODO
158	return false;
159}
160
161static void _GBCoreSetKeys(struct mCore* core, uint32_t keys) {
162	struct GBCore* gbcore = (struct GBCore*) core;
163	gbcore->keys = keys;
164}
165
166static void _GBCoreAddKeys(struct mCore* core, uint32_t keys) {
167	struct GBCore* gbcore = (struct GBCore*) core;
168	gbcore->keys |= keys;
169}
170
171static void _GBCoreClearKeys(struct mCore* core, uint32_t keys) {
172	struct GBCore* gbcore = (struct GBCore*) core;
173	gbcore->keys &= ~keys;
174}
175
176static int32_t _GBCoreFrameCounter(struct mCore* core) {
177	struct GB* gb = core->board;
178	return gb->video.frameCounter;
179}
180
181static int32_t _GBCoreFrameCycles(struct mCore* core) {
182	UNUSED(core);
183	return GB_VIDEO_TOTAL_LENGTH;
184}
185
186static int32_t _GBCoreFrequency(struct mCore* core) {
187	UNUSED(core);
188	// TODO: GB differences
189	return DMG_LR35902_FREQUENCY;
190}
191
192static void _GBCoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
193	struct GB* gb = core->board;
194	gb->memory.rtc = rtc;
195}
196
197struct mCore* GBCoreCreate(void) {
198	struct GBCore* gbcore = malloc(sizeof(*gbcore));
199	struct mCore* core = &gbcore->d;
200	memset(&core->opts, 0, sizeof(core->opts));
201	core->cpu = 0;
202	core->board = 0;
203	core->init = _GBCoreInit;
204	core->deinit = _GBCoreDeinit;
205	core->setSync = _GBCoreSetSync;
206	core->loadConfig = _GBCoreLoadConfig;
207	core->desiredVideoDimensions = _GBCoreDesiredVideoDimensions;
208	core->setVideoBuffer = _GBCoreSetVideoBuffer;
209	core->getVideoBuffer = _GBCoreGetVideoBuffer;
210	core->getAudioChannel = _GBCoreGetAudioChannel;
211	core->isROM = GBIsROM;
212	core->loadROM = _GBCoreLoadROM;
213	core->loadSave = _GBCoreLoadSave;
214	core->loadPatch = _GBCoreLoadPatch;
215	core->unloadROM = _GBCoreUnloadROM;
216	core->reset = _GBCoreReset;
217	core->runFrame = _GBCoreRunFrame;
218	core->runLoop = _GBCoreRunLoop;
219	core->step = _GBCoreStep;
220	core->loadState = _GBCoreLoadState;
221	core->saveState = _GBCoreSaveState;
222	core->setKeys = _GBCoreSetKeys;
223	core->addKeys = _GBCoreAddKeys;
224	core->clearKeys = _GBCoreClearKeys;
225	core->frameCounter = _GBCoreFrameCounter;
226	core->frameCycles = _GBCoreFrameCycles;
227	core->frequency = _GBCoreFrequency;
228	core->setRTC = _GBCoreSetRTC;
229	return core;
230}