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 GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
24static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
25static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
26static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
27static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
28
29static void _cleanOAM(struct GBVideo* video, int y);
30
31static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
32static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
33static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
34static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
35static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
36
37static struct GBVideoRenderer dummyRenderer = {
38 .init = GBVideoDummyRendererInit,
39 .deinit = GBVideoDummyRendererDeinit,
40 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
41 .writeVRAM = GBVideoDummyRendererWriteVRAM,
42 .writePalette = GBVideoDummyRendererWritePalette,
43 .drawRange = GBVideoDummyRendererDrawRange,
44 .finishScanline = GBVideoDummyRendererFinishScanline,
45 .finishFrame = GBVideoDummyRendererFinishFrame,
46 .getPixels = GBVideoDummyRendererGetPixels,
47 .putPixels = GBVideoDummyRendererPutPixels,
48};
49
50void GBVideoInit(struct GBVideo* video) {
51 video->renderer = &dummyRenderer;
52 video->renderer->cache = NULL;
53 video->vram = 0;
54 video->frameskip = 0;
55
56 video->modeEvent.context = video;
57 video->modeEvent.name = "GB Video Mode";
58 video->modeEvent.callback = NULL;
59 video->modeEvent.priority = 8;
60 video->frameEvent.context = video;
61 video->frameEvent.name = "GB Video Frame";
62 video->frameEvent.callback = _updateFrameCount;
63 video->frameEvent.priority = 9;
64
65 video->dmgPalette[0] = 0x7FFF;
66 video->dmgPalette[1] = 0x56B5;
67 video->dmgPalette[2] = 0x294A;
68 video->dmgPalette[3] = 0x0000;
69}
70
71void GBVideoReset(struct GBVideo* video) {
72 video->ly = 0;
73 video->x = 0;
74 video->mode = 1;
75 video->stat = 1;
76
77 video->frameCounter = 0;
78 video->frameskipCounter = 0;
79
80 if (video->vram) {
81 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
82 }
83 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
84 GBVideoSwitchBank(video, 0);
85 video->renderer->vram = video->vram;
86 memset(&video->oam, 0, sizeof(video->oam));
87 video->renderer->oam = &video->oam;
88 memset(&video->palette, 0, sizeof(video->palette));
89
90 video->renderer->deinit(video->renderer);
91 video->renderer->init(video->renderer, video->p->model);
92}
93
94void GBVideoDeinit(struct GBVideo* video) {
95 GBVideoAssociateRenderer(video, &dummyRenderer);
96 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
97}
98
99void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
100 video->renderer->deinit(video->renderer);
101 renderer->cache = video->renderer->cache;
102 video->renderer = renderer;
103 renderer->vram = video->vram;
104 video->renderer->init(video->renderer, video->p->model);
105}
106
107void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
108 struct GBVideo* video = context;
109 if (video->frameskipCounter <= 0) {
110 video->renderer->finishScanline(video->renderer, video->ly);
111 }
112 int lyc = video->p->memory.io[REG_LYC];
113 int32_t next;
114 ++video->ly;
115 video->p->memory.io[REG_LY] = video->ly;
116 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
117 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
118 // TODO: Cache SCX & 7 in case it changes during mode 2
119 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
120 video->mode = 2;
121 video->modeEvent.callback = _endMode2;
122 if (!GBRegisterSTATIsHblankIRQ(video->stat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
123 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
124 }
125 } else {
126 next = GB_VIDEO_HORIZONTAL_LENGTH;
127 video->mode = 1;
128 video->modeEvent.callback = _endMode1;
129
130 _updateFrameCount(timing, video, cyclesLate);
131
132 if (GBRegisterSTATIsVblankIRQ(video->stat) || GBRegisterSTATIsOAMIRQ(video->stat)) {
133 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
134 }
135 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
136 }
137 if (!GBRegisterSTATIsHblankIRQ(video->stat) && GBRegisterSTATIsLYCIRQ(video->stat) && lyc == video->ly) {
138 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
139 }
140 GBUpdateIRQs(video->p);
141 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
142 video->p->memory.io[REG_STAT] = video->stat;
143 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
144}
145
146void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
147 struct GBVideo* video = context;
148 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
149 return;
150 }
151 int lyc = video->p->memory.io[REG_LYC];
152 // TODO: One M-cycle delay
153 ++video->ly;
154 int32_t next;
155 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
156 video->ly = 0;
157 video->p->memory.io[REG_LY] = video->ly;
158 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
159 video->mode = 2;
160 video->modeEvent.callback = _endMode2;
161 if (GBRegisterSTATIsOAMIRQ(video->stat)) {
162 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
163 GBUpdateIRQs(video->p);
164 }
165 if (video->p->memory.mbcType == GB_MBC7 && video->p->memory.rotation && video->p->memory.rotation->sample) {
166 video->p->memory.rotation->sample(video->p->memory.rotation);
167 }
168 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
169 video->p->memory.io[REG_LY] = 0;
170 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
171 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
172 video->p->memory.io[REG_LY] = video->ly;
173 next = 8;
174 } else {
175 video->p->memory.io[REG_LY] = video->ly;
176 next = GB_VIDEO_HORIZONTAL_LENGTH;
177 }
178
179 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
180 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
181 if (video->ly && GBRegisterSTATIsLYCIRQ(video->stat) && lyc == video->p->memory.io[REG_LY]) {
182 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
183 GBUpdateIRQs(video->p);
184 }
185 video->p->memory.io[REG_STAT] = video->stat;
186 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
187}
188
189void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
190 struct GBVideo* video = context;
191 _cleanOAM(video, video->ly);
192 video->x = 0;
193 video->dotClock = timing->masterCycles - cyclesLate;
194 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 11 - (video->p->memory.io[REG_SCX] & 7);
195 video->mode = 3;
196 video->modeEvent.callback = _endMode3;
197 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
198 video->p->memory.io[REG_STAT] = video->stat;
199 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
200}
201
202void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
203 struct GBVideo* video = context;
204 GBVideoProcessDots(video);
205 if (GBRegisterSTATIsHblankIRQ(video->stat)) {
206 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
207 GBUpdateIRQs(video->p);
208 }
209 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
210 video->p->memory.hdmaRemaining = 0x10;
211 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
212 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
213 }
214 video->mode = 0;
215 video->modeEvent.callback = _endMode0;
216 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
217 video->p->memory.io[REG_STAT] = video->stat;
218 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 11;
219 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
220}
221
222void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
223 UNUSED(cyclesLate);
224 struct GBVideo* video = context;
225 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
226 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
227 return;
228 }
229
230 size_t c;
231 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
232 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
233 if (callbacks->videoFrameEnded) {
234 callbacks->videoFrameEnded(callbacks->context);
235 }
236 }
237
238 GBFrameEnded(video->p);
239 --video->frameskipCounter;
240 if (video->frameskipCounter < 0) {
241 video->renderer->finishFrame(video->renderer);
242 mCoreSyncPostFrame(video->p->sync);
243 video->frameskipCounter = video->frameskip;
244 }
245 ++video->frameCounter;
246
247 // TODO: Move to common code
248 if (video->p->stream && video->p->stream->postVideoFrame) {
249 const color_t* pixels;
250 size_t stride;
251 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
252 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
253 }
254
255 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
256 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
257 if (callbacks->videoFrameStarted) {
258 callbacks->videoFrameStarted(callbacks->context);
259 }
260 }
261
262 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
263 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
264 }
265}
266
267static void _cleanOAM(struct GBVideo* video, int y) {
268 // TODO: GBC differences
269 // TODO: Optimize
270 video->objMax = 0;
271 int spriteHeight = 8;
272 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
273 spriteHeight = 16;
274 }
275 int o = 0;
276 int i;
277 for (i = 0; i < 40; ++i) {
278 uint8_t oy = video->oam.obj[i].y;
279 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
280 continue;
281 }
282 // TODO: Sort
283 video->objThisLine[o] = video->oam.obj[i];
284 ++o;
285 if (o == 10) {
286 break;
287 }
288 }
289 video->objMax = o;
290}
291
292void GBVideoProcessDots(struct GBVideo* video) {
293 if (video->mode != 3) {
294 return;
295 }
296 int oldX = video->x;
297 video->x = (video->p->timing.masterCycles - video->dotClock + video->p->cpu->cycles) >> video->p->doubleSpeed;
298 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
299 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
300 } else if (video->x < 0) {
301 mLOG(GB, FATAL, "Video dot clock went negative!");
302 video->x = oldX;
303 }
304 if (video->frameskipCounter <= 0) {
305 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
306 }
307}
308
309void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
310 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
311 video->mode = 2;
312 video->modeEvent.callback = _endMode2;
313 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
314 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
315
316 video->ly = 0;
317 video->p->memory.io[REG_LY] = 0;
318 // TODO: Does this read as 0 for 4 T-cycles?
319 video->stat = GBRegisterSTATSetMode(video->stat, 2);
320 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
321 if (GBRegisterSTATIsLYCIRQ(video->stat) && video->ly == video->p->memory.io[REG_LYC]) {
322 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
323 GBUpdateIRQs(video->p);
324 }
325 video->p->memory.io[REG_STAT] = video->stat;
326 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
327
328 mTimingDeschedule(&video->p->timing, &video->frameEvent);
329 }
330 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
331 // TODO: Fix serialization; this gets internal and visible modes out of sync
332 video->stat = GBRegisterSTATSetMode(video->stat, 0);
333 video->p->memory.io[REG_STAT] = video->stat;
334 video->ly = 0;
335 video->p->memory.io[REG_LY] = 0;
336 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
337
338 mTimingDeschedule(&video->p->timing, &video->modeEvent);
339 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
340 }
341 video->p->memory.io[REG_STAT] = video->stat;
342}
343
344void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
345 video->stat = (video->stat & 0x7) | (value & 0x78);
346 if (video->p->model == GB_MODEL_DMG && video->mode == 1) {
347 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
348 GBUpdateIRQs(video->p);
349 }
350}
351
352void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
353 if (video->mode == 2) {
354 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
355 if (GBRegisterSTATIsLYCIRQ(video->stat) && value == video->ly) {
356 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
357 GBUpdateIRQs(video->p);
358 }
359 }
360}
361
362void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
363 if (video->p->model < GB_MODEL_CGB) {
364 switch (address) {
365 case REG_BGP:
366 video->palette[0] = video->dmgPalette[value & 3];
367 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
368 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
369 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
370 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
371 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
372 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
373 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
374 break;
375 case REG_OBP0:
376 video->palette[8 * 4 + 0] = video->dmgPalette[value & 3];
377 video->palette[8 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
378 video->palette[8 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
379 video->palette[8 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
380 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
381 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
382 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
383 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
384 break;
385 case REG_OBP1:
386 video->palette[9 * 4 + 0] = video->dmgPalette[value & 3];
387 video->palette[9 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
388 video->palette[9 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
389 video->palette[9 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
390 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
391 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
392 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
393 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
394 break;
395 }
396 } else {
397 switch (address) {
398 case REG_BCPD:
399 if (video->bcpIndex & 1) {
400 video->palette[video->bcpIndex >> 1] &= 0x00FF;
401 video->palette[video->bcpIndex >> 1] |= value << 8;
402 } else {
403 video->palette[video->bcpIndex >> 1] &= 0xFF00;
404 video->palette[video->bcpIndex >> 1] |= value;
405 }
406 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
407 if (video->bcpIncrement) {
408 ++video->bcpIndex;
409 video->bcpIndex &= 0x3F;
410 video->p->memory.io[REG_BCPS] &= 0x80;
411 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
412 }
413 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
414 break;
415 case REG_OCPD:
416 if (video->ocpIndex & 1) {
417 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
418 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
419 } else {
420 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
421 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
422 }
423 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
424 if (video->ocpIncrement) {
425 ++video->ocpIndex;
426 video->ocpIndex &= 0x3F;
427 video->p->memory.io[REG_OCPS] &= 0x80;
428 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
429 }
430 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
431 break;
432 }
433 }
434}
435
436void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
437 value &= 1;
438 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
439 video->vramCurrentBank = value;
440}
441
442void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint16_t color) {
443 if (index >= 4) {
444 return;
445 }
446 video->dmgPalette[index] = color;
447}
448
449static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model) {
450 UNUSED(renderer);
451 UNUSED(model);
452 // Nothing to do
453}
454
455static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
456 UNUSED(renderer);
457 // Nothing to do
458}
459
460static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
461 UNUSED(renderer);
462 UNUSED(address);
463 return value;
464}
465
466static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
467 if (renderer->cache) {
468 mTileCacheWriteVRAM(renderer->cache, address);
469 }
470}
471
472static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
473 UNUSED(value);
474 if (renderer->cache) {
475 mTileCacheWritePalette(renderer->cache, index << 1);
476 }
477}
478
479static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
480 UNUSED(renderer);
481 UNUSED(endX);
482 UNUSED(startX);
483 UNUSED(y);
484 UNUSED(obj);
485 UNUSED(oamMax);
486 // Nothing to do
487}
488
489static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
490 UNUSED(renderer);
491 UNUSED(y);
492 // Nothing to do
493}
494
495static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
496 UNUSED(renderer);
497 // Nothing to do
498}
499
500static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
501 UNUSED(renderer);
502 UNUSED(stride);
503 UNUSED(pixels);
504 // Nothing to do
505}
506
507static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
508 UNUSED(renderer);
509 UNUSED(stride);
510 UNUSED(pixels);
511 // Nothing to do
512}
513
514void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
515 STORE_16LE(video->x, 0, &state->video.x);
516 STORE_16LE(video->ly, 0, &state->video.ly);
517 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
518 state->video.vramCurrentBank = video->vramCurrentBank;
519
520 GBSerializedVideoFlags flags = 0;
521 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
522 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
523 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
524 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
525 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
526 state->video.flags = flags;
527 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
528 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
529
530 size_t i;
531 for (i = 0; i < 64; ++i) {
532 STORE_16LE(video->palette[i], i * 2, state->video.palette);
533 }
534
535 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
536 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
537
538 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
539 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
540}
541
542void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
543 LOAD_16LE(video->x, 0, &state->video.x);
544 LOAD_16LE(video->ly, 0, &state->video.ly);
545 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
546 video->vramCurrentBank = state->video.vramCurrentBank;
547
548 GBSerializedVideoFlags flags = state->video.flags;
549 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
550 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
551 video->mode = GBSerializedVideoFlagsGetMode(flags);
552 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
553 video->bcpIndex &= 0x3F;
554 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
555 video->ocpIndex &= 0x3F;
556
557 switch (video->mode) {
558 case 0:
559 video->modeEvent.callback = _endMode0;
560 break;
561 case 1:
562 video->modeEvent.callback = _endMode1;
563 break;
564 case 2:
565 video->modeEvent.callback = _endMode2;
566 break;
567 case 3:
568 video->modeEvent.callback = _endMode3;
569 break;
570 }
571
572 uint32_t when;
573 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
574 LOAD_32LE(when, 0, &state->video.nextMode);
575 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
576 }
577 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
578 LOAD_32LE(when, 0, &state->video.nextFrame);
579 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
580 }
581
582 size_t i;
583 for (i = 0; i < 64; ++i) {
584 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
585 video->renderer->writePalette(video->renderer, i, video->palette[i]);
586 }
587
588 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
589 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
590
591 _cleanOAM(video, video->ly);
592 GBVideoSwitchBank(video, video->vramCurrentBank);
593}