src/gb/video.c (view raw)
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 <mgba/internal/gb/video.h>
7
8#include <mgba/core/sync.h>
9#include <mgba/core/thread.h>
10#include <mgba/core/tile-cache.h>
11#include <mgba/internal/gb/gb.h>
12#include <mgba/internal/gb/io.h>
13#include <mgba/internal/gb/serialize.h>
14#include <mgba/internal/lr35902/lr35902.h>
15
16#include <mgba-util/memory.h>
17
18static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model);
19static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
20static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
21static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
22static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
23static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
24static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
25static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
26static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
27static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
28static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
29
30static void _cleanOAM(struct GBVideo* video, int y);
31
32static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
33static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
34static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
35static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
36static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
37
38static struct GBVideoRenderer dummyRenderer = {
39 .init = GBVideoDummyRendererInit,
40 .deinit = GBVideoDummyRendererDeinit,
41 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
42 .writeVRAM = GBVideoDummyRendererWriteVRAM,
43 .writeOAM = GBVideoDummyRendererWriteOAM,
44 .writePalette = GBVideoDummyRendererWritePalette,
45 .drawRange = GBVideoDummyRendererDrawRange,
46 .finishScanline = GBVideoDummyRendererFinishScanline,
47 .finishFrame = GBVideoDummyRendererFinishFrame,
48 .getPixels = GBVideoDummyRendererGetPixels,
49 .putPixels = GBVideoDummyRendererPutPixels,
50};
51
52void GBVideoInit(struct GBVideo* video) {
53 video->renderer = &dummyRenderer;
54 video->renderer->cache = NULL;
55 video->vram = 0;
56 video->frameskip = 0;
57
58 video->modeEvent.context = video;
59 video->modeEvent.name = "GB Video Mode";
60 video->modeEvent.callback = NULL;
61 video->modeEvent.priority = 8;
62 video->frameEvent.context = video;
63 video->frameEvent.name = "GB Video Frame";
64 video->frameEvent.callback = _updateFrameCount;
65 video->frameEvent.priority = 9;
66
67 video->dmgPalette[0] = 0x7FFF;
68 video->dmgPalette[1] = 0x56B5;
69 video->dmgPalette[2] = 0x294A;
70 video->dmgPalette[3] = 0x0000;
71}
72
73void GBVideoReset(struct GBVideo* video) {
74 video->ly = 0;
75 video->x = 0;
76 video->mode = 1;
77 video->stat = 1;
78
79 video->frameCounter = 0;
80 video->frameskipCounter = 0;
81
82 if (video->vram) {
83 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
84 }
85 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
86 GBVideoSwitchBank(video, 0);
87 video->renderer->vram = video->vram;
88 memset(&video->oam, 0, sizeof(video->oam));
89 video->renderer->oam = &video->oam;
90 memset(&video->palette, 0, sizeof(video->palette));
91
92 video->renderer->deinit(video->renderer);
93 video->renderer->init(video->renderer, video->p->model);
94}
95
96void GBVideoDeinit(struct GBVideo* video) {
97 GBVideoAssociateRenderer(video, &dummyRenderer);
98 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
99}
100
101void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
102 video->renderer->deinit(video->renderer);
103 renderer->cache = video->renderer->cache;
104 video->renderer = renderer;
105 renderer->vram = video->vram;
106 video->renderer->init(video->renderer, video->p->model);
107}
108
109static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
110 // TODO: variable for the IRQ line value?
111 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
112 return true;
113 }
114 switch (GBRegisterSTATGetMode(stat)) {
115 case 0:
116 if (GBRegisterSTATIsHblankIRQ(stat)) {
117 return true;
118 }
119 break;
120 case 1:
121 if (GBRegisterSTATIsVblankIRQ(stat)) {
122 return true;
123 }
124 break;
125 case 2:
126 if (GBRegisterSTATIsOAMIRQ(stat)) {
127 return true;
128 }
129 break;
130 case 3:
131 break;
132 }
133 return false;
134}
135
136void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
137 struct GBVideo* video = context;
138 if (video->frameskipCounter <= 0) {
139 video->renderer->finishScanline(video->renderer, video->ly);
140 }
141 int lyc = video->p->memory.io[REG_LYC];
142 int32_t next;
143 ++video->ly;
144 video->p->memory.io[REG_LY] = video->ly;
145 GBRegisterSTAT oldStat = video->stat;
146 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
147 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
148 // TODO: Cache SCX & 7 in case it changes during mode 2
149 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
150 video->mode = 2;
151 video->modeEvent.callback = _endMode2;
152 } else {
153 next = GB_VIDEO_HORIZONTAL_LENGTH;
154 video->mode = 1;
155 video->modeEvent.callback = _endMode1;
156
157 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
158
159 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
160 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
161 }
162 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
163 }
164 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
165 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
166 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
167 }
168 GBUpdateIRQs(video->p);
169 video->p->memory.io[REG_STAT] = video->stat;
170 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
171}
172
173void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
174 struct GBVideo* video = context;
175 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
176 return;
177 }
178 int lyc = video->p->memory.io[REG_LYC];
179 // TODO: One M-cycle delay
180 ++video->ly;
181 int32_t next;
182 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
183 video->ly = 0;
184 video->p->memory.io[REG_LY] = video->ly;
185 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
186 video->mode = 2;
187 video->modeEvent.callback = _endMode2;
188 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
189 video->p->memory.io[REG_LY] = 0;
190 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
191 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
192 video->p->memory.io[REG_LY] = video->ly;
193 next = 8;
194 } else {
195 video->p->memory.io[REG_LY] = video->ly;
196 next = GB_VIDEO_HORIZONTAL_LENGTH;
197 }
198
199 GBRegisterSTAT oldStat = video->stat;
200 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
201 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
202 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
203 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
204 GBUpdateIRQs(video->p);
205 }
206 video->p->memory.io[REG_STAT] = video->stat;
207 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
208}
209
210void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
211 struct GBVideo* video = context;
212 _cleanOAM(video, video->ly);
213 video->x = 0;
214 video->dotClock = mTimingCurrentTime(timing) - cyclesLate;
215 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
216 video->mode = 3;
217 video->modeEvent.callback = _endMode3;
218 GBRegisterSTAT oldStat = video->stat;
219 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
220 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
221 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
222 GBUpdateIRQs(video->p);
223 }
224 video->p->memory.io[REG_STAT] = video->stat;
225 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
226}
227
228void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
229 struct GBVideo* video = context;
230 GBVideoProcessDots(video);
231 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
232 video->p->memory.hdmaRemaining = 0x10;
233 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
234 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
235 }
236 video->mode = 0;
237 video->modeEvent.callback = _endMode0;
238 GBRegisterSTAT oldStat = video->stat;
239 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
240 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
241 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
242 GBUpdateIRQs(video->p);
243 }
244 video->p->memory.io[REG_STAT] = video->stat;
245 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6;
246 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
247}
248
249void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
250 UNUSED(cyclesLate);
251 struct GBVideo* video = context;
252 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
253 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
254 return;
255 }
256
257 size_t c;
258 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
259 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
260 if (callbacks->videoFrameEnded) {
261 callbacks->videoFrameEnded(callbacks->context);
262 }
263 }
264
265 GBFrameEnded(video->p);
266 --video->frameskipCounter;
267 if (video->frameskipCounter < 0) {
268 video->renderer->finishFrame(video->renderer);
269 mCoreSyncPostFrame(video->p->sync);
270 video->frameskipCounter = video->frameskip;
271 }
272 ++video->frameCounter;
273
274 // TODO: Move to common code
275 if (video->p->stream && video->p->stream->postVideoFrame) {
276 const color_t* pixels;
277 size_t stride;
278 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
279 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
280 }
281
282 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
283 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
284 }
285
286 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
287 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
288 if (callbacks->videoFrameStarted) {
289 callbacks->videoFrameStarted(callbacks->context);
290 }
291 }
292}
293
294static void _cleanOAM(struct GBVideo* video, int y) {
295 // TODO: GBC differences
296 // TODO: Optimize
297 video->objMax = 0;
298 int spriteHeight = 8;
299 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
300 spriteHeight = 16;
301 }
302 int o = 0;
303 int i;
304 for (i = 0; i < 40; ++i) {
305 uint8_t oy = video->oam.obj[i].y;
306 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
307 continue;
308 }
309 // TODO: Sort
310 video->objThisLine[o] = video->oam.obj[i];
311 ++o;
312 if (o == 10) {
313 break;
314 }
315 }
316 video->objMax = o;
317}
318
319void GBVideoProcessDots(struct GBVideo* video) {
320 if (video->mode != 3) {
321 return;
322 }
323 int oldX = video->x;
324 video->x = (video->p->timing.masterCycles - video->dotClock + video->p->cpu->cycles) >> video->p->doubleSpeed;
325 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
326 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
327 } else if (video->x < 0) {
328 mLOG(GB, FATAL, "Video dot clock went negative!");
329 video->x = oldX;
330 }
331 if (video->frameskipCounter <= 0) {
332 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
333 }
334}
335
336void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
337 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
338 video->mode = 2;
339 video->modeEvent.callback = _endMode2;
340 int32_t next = GB_VIDEO_MODE_2_LENGTH - 5; // TODO: Why is this fudge factor needed? Might be related to T-cycles for load/store differing
341 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
342
343 video->ly = 0;
344 video->p->memory.io[REG_LY] = 0;
345 // TODO: Does this read as 0 for 4 T-cycles?
346 GBRegisterSTAT oldStat = video->stat;
347 video->stat = GBRegisterSTATSetMode(video->stat, 2);
348 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
349 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
350 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
351 GBUpdateIRQs(video->p);
352 }
353 video->p->memory.io[REG_STAT] = video->stat;
354 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
355
356 mTimingDeschedule(&video->p->timing, &video->frameEvent);
357 }
358 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
359 // TODO: Fix serialization; this gets internal and visible modes out of sync
360 video->stat = GBRegisterSTATSetMode(video->stat, 0);
361 video->p->memory.io[REG_STAT] = video->stat;
362 video->ly = 0;
363 video->p->memory.io[REG_LY] = 0;
364 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
365
366 mTimingDeschedule(&video->p->timing, &video->modeEvent);
367 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
368 }
369 video->p->memory.io[REG_STAT] = video->stat;
370}
371
372void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
373 GBRegisterSTAT oldStat = video->stat;
374 video->stat = (video->stat & 0x7) | (value & 0x78);
375 if (video->p->model == GB_MODEL_DMG && !_statIRQAsserted(video, oldStat) && video->mode < 3) {
376 // TODO: variable for the IRQ line value?
377 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
378 GBUpdateIRQs(video->p);
379 }
380}
381
382void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
383 GBRegisterSTAT oldStat = video->stat;
384 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
385 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
386 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
387 GBUpdateIRQs(video->p);
388 }
389 video->p->memory.io[REG_STAT] = video->stat;
390}
391
392void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
393 if (video->p->model < GB_MODEL_CGB) {
394 switch (address) {
395 case REG_BGP:
396 video->palette[0] = video->dmgPalette[value & 3];
397 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
398 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
399 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
400 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
401 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
402 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
403 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
404 break;
405 case REG_OBP0:
406 video->palette[8 * 4 + 0] = video->dmgPalette[value & 3];
407 video->palette[8 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
408 video->palette[8 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
409 video->palette[8 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
410 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
411 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
412 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
413 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
414 break;
415 case REG_OBP1:
416 video->palette[9 * 4 + 0] = video->dmgPalette[value & 3];
417 video->palette[9 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
418 video->palette[9 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
419 video->palette[9 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
420 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
421 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
422 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
423 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
424 break;
425 }
426 } else {
427 switch (address) {
428 case REG_BCPD:
429 if (video->bcpIndex & 1) {
430 video->palette[video->bcpIndex >> 1] &= 0x00FF;
431 video->palette[video->bcpIndex >> 1] |= value << 8;
432 } else {
433 video->palette[video->bcpIndex >> 1] &= 0xFF00;
434 video->palette[video->bcpIndex >> 1] |= value;
435 }
436 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
437 if (video->bcpIncrement) {
438 ++video->bcpIndex;
439 video->bcpIndex &= 0x3F;
440 video->p->memory.io[REG_BCPS] &= 0x80;
441 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
442 }
443 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
444 break;
445 case REG_OCPD:
446 if (video->ocpIndex & 1) {
447 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
448 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
449 } else {
450 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
451 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
452 }
453 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
454 if (video->ocpIncrement) {
455 ++video->ocpIndex;
456 video->ocpIndex &= 0x3F;
457 video->p->memory.io[REG_OCPS] &= 0x80;
458 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
459 }
460 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
461 break;
462 }
463 }
464}
465
466void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
467 value &= 1;
468 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
469 video->vramCurrentBank = value;
470}
471
472void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
473 if (index >= 4) {
474 return;
475 }
476 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
477}
478
479static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model) {
480 UNUSED(renderer);
481 UNUSED(model);
482 // Nothing to do
483}
484
485static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
486 UNUSED(renderer);
487 // Nothing to do
488}
489
490static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
491 UNUSED(renderer);
492 UNUSED(address);
493 return value;
494}
495
496static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
497 if (renderer->cache) {
498 mTileCacheWriteVRAM(renderer->cache, address);
499 }
500}
501
502static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
503 UNUSED(renderer);
504 UNUSED(oam);
505 // Nothing to do
506}
507
508static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
509 UNUSED(value);
510 if (renderer->cache) {
511 mTileCacheWritePalette(renderer->cache, index << 1);
512 }
513}
514
515static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
516 UNUSED(renderer);
517 UNUSED(endX);
518 UNUSED(startX);
519 UNUSED(y);
520 UNUSED(obj);
521 UNUSED(oamMax);
522 // Nothing to do
523}
524
525static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
526 UNUSED(renderer);
527 UNUSED(y);
528 // Nothing to do
529}
530
531static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
532 UNUSED(renderer);
533 // Nothing to do
534}
535
536static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
537 UNUSED(renderer);
538 UNUSED(stride);
539 UNUSED(pixels);
540 // Nothing to do
541}
542
543static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
544 UNUSED(renderer);
545 UNUSED(stride);
546 UNUSED(pixels);
547 // Nothing to do
548}
549
550void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
551 STORE_16LE(video->x, 0, &state->video.x);
552 STORE_16LE(video->ly, 0, &state->video.ly);
553 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
554 state->video.vramCurrentBank = video->vramCurrentBank;
555
556 GBSerializedVideoFlags flags = 0;
557 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
558 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
559 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
560 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
561 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
562 state->video.flags = flags;
563 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
564 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
565
566 size_t i;
567 for (i = 0; i < 64; ++i) {
568 STORE_16LE(video->palette[i], i * 2, state->video.palette);
569 }
570
571 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
572 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
573
574 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
575 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
576}
577
578void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
579 LOAD_16LE(video->x, 0, &state->video.x);
580 LOAD_16LE(video->ly, 0, &state->video.ly);
581 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
582 video->vramCurrentBank = state->video.vramCurrentBank;
583
584 GBSerializedVideoFlags flags = state->video.flags;
585 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
586 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
587 video->mode = GBSerializedVideoFlagsGetMode(flags);
588 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
589 video->bcpIndex &= 0x3F;
590 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
591 video->ocpIndex &= 0x3F;
592
593 switch (video->mode) {
594 case 0:
595 video->modeEvent.callback = _endMode0;
596 break;
597 case 1:
598 video->modeEvent.callback = _endMode1;
599 break;
600 case 2:
601 video->modeEvent.callback = _endMode2;
602 break;
603 case 3:
604 video->modeEvent.callback = _endMode3;
605 break;
606 }
607
608 uint32_t when;
609 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
610 LOAD_32LE(when, 0, &state->video.nextMode);
611 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
612 }
613 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
614 LOAD_32LE(when, 0, &state->video.nextFrame);
615 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
616 }
617
618 size_t i;
619 for (i = 0; i < 64; ++i) {
620 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
621 video->renderer->writePalette(video->renderer, i, video->palette[i]);
622 }
623
624 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
625 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
626
627 _cleanOAM(video, video->ly);
628 GBVideoSwitchBank(video, video->vramCurrentBank);
629
630 video->renderer->deinit(video->renderer);
631 video->renderer->init(video->renderer, video->p->model);
632}