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 "video.h"
7
8#include "core/sync.h"
9#include "core/thread.h"
10#include "core/tile-cache.h"
11#include "gb/gb.h"
12#include "gb/io.h"
13#include "gb/serialize.h"
14
15#include "util/memory.h"
16
17static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model);
18static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
19static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
20static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
21static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
22static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
23static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
24static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
25static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
26static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
27
28static void _cleanOAM(struct GBVideo* video, int y);
29
30static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
31static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
32static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
33static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
34static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
35
36static struct GBVideoRenderer dummyRenderer = {
37 .init = GBVideoDummyRendererInit,
38 .deinit = GBVideoDummyRendererDeinit,
39 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
40 .writeVRAM = GBVideoDummyRendererWriteVRAM,
41 .writePalette = GBVideoDummyRendererWritePalette,
42 .drawRange = GBVideoDummyRendererDrawRange,
43 .finishScanline = GBVideoDummyRendererFinishScanline,
44 .finishFrame = GBVideoDummyRendererFinishFrame,
45 .getPixels = GBVideoDummyRendererGetPixels,
46 .putPixels = GBVideoDummyRendererPutPixels,
47};
48
49void GBVideoInit(struct GBVideo* video) {
50 video->renderer = &dummyRenderer;
51 video->renderer->cache = NULL;
52 video->vram = 0;
53 video->frameskip = 0;
54
55 video->modeEvent.context = video;
56 video->modeEvent.name = "GB Video Mode";
57 video->modeEvent.callback = NULL;
58 video->frameEvent.context = video;
59 video->frameEvent.name = "GB Video Frame";
60 video->frameEvent.callback = _updateFrameCount;
61}
62
63void GBVideoReset(struct GBVideo* video) {
64 video->ly = 0;
65 video->x = 0;
66 video->mode = 1;
67 video->stat = 1;
68
69 video->frameCounter = 0;
70 video->frameskipCounter = 0;
71
72 if (video->vram) {
73 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
74 }
75 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
76 GBVideoSwitchBank(video, 0);
77 video->renderer->vram = video->vram;
78 memset(&video->oam, 0, sizeof(video->oam));
79 video->renderer->oam = &video->oam;
80 memset(&video->palette, 0, sizeof(video->palette));
81
82 video->renderer->deinit(video->renderer);
83 video->renderer->init(video->renderer, video->p->model);
84}
85
86void GBVideoDeinit(struct GBVideo* video) {
87 GBVideoAssociateRenderer(video, &dummyRenderer);
88 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
89}
90
91void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
92 video->renderer->deinit(video->renderer);
93 renderer->cache = video->renderer->cache;
94 video->renderer = renderer;
95 renderer->vram = video->vram;
96 video->renderer->init(video->renderer, video->p->model);
97}
98
99void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
100 struct GBVideo* video = context;
101 if (video->frameskipCounter <= 0) {
102 video->renderer->finishScanline(video->renderer, video->ly);
103 }
104 int lyc = video->p->memory.io[REG_LYC];
105 int32_t next;
106 ++video->ly;
107 video->p->memory.io[REG_LY] = video->ly;
108 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
109 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
110 // TODO: Cache SCX & 7 in case it changes during mode 2
111 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
112 video->mode = 2;
113 video->modeEvent.callback = _endMode2;
114 if (!GBRegisterSTATIsHblankIRQ(video->stat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
115 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
116 }
117 } else {
118 next = GB_VIDEO_HORIZONTAL_LENGTH;
119 video->mode = 1;
120 video->modeEvent.callback = _endMode1;
121
122 _updateFrameCount(timing, video, cyclesLate);
123
124 if (GBRegisterSTATIsVblankIRQ(video->stat) || GBRegisterSTATIsOAMIRQ(video->stat)) {
125 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
126 }
127 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
128
129 struct mCoreCallbacks* callbacks = video->p->coreCallbacks;
130 if (callbacks && callbacks->videoFrameEnded) {
131 callbacks->videoFrameEnded(callbacks->context);
132 }
133 }
134 if (!GBRegisterSTATIsHblankIRQ(video->stat) && GBRegisterSTATIsLYCIRQ(video->stat) && lyc == video->ly) {
135 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
136 }
137 GBUpdateIRQs(video->p);
138 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
139 video->p->memory.io[REG_STAT] = video->stat;
140 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
141}
142
143void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
144 struct GBVideo* video = context;
145 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
146 return;
147 }
148 int lyc = video->p->memory.io[REG_LYC];
149 // TODO: One M-cycle delay
150 ++video->ly;
151 int32_t next;
152 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
153 video->ly = 0;
154 video->p->memory.io[REG_LY] = video->ly;
155 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
156 video->mode = 2;
157 video->modeEvent.callback = _endMode2;
158 if (GBRegisterSTATIsOAMIRQ(video->stat)) {
159 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
160 GBUpdateIRQs(video->p);
161 }
162 video->renderer->finishFrame(video->renderer);
163 if (video->p->memory.mbcType == GB_MBC7 && video->p->memory.rotation && video->p->memory.rotation->sample) {
164 video->p->memory.rotation->sample(video->p->memory.rotation);
165 }
166 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
167 video->p->memory.io[REG_LY] = 0;
168 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
169 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
170 video->p->memory.io[REG_LY] = video->ly;
171 next = 8;
172 } else {
173 video->p->memory.io[REG_LY] = video->ly;
174 next = GB_VIDEO_HORIZONTAL_LENGTH;
175 }
176
177 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
178 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
179 if (video->ly && GBRegisterSTATIsLYCIRQ(video->stat) && lyc == video->p->memory.io[REG_LY]) {
180 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
181 GBUpdateIRQs(video->p);
182 }
183 video->p->memory.io[REG_STAT] = video->stat;
184 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
185}
186
187void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
188 struct GBVideo* video = context;
189 _cleanOAM(video, video->ly);
190 video->x = 0;
191 video->dotClock = timing->masterCycles - cyclesLate;
192 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 11 - (video->p->memory.io[REG_SCX] & 7);
193 video->mode = 3;
194 video->modeEvent.callback = _endMode3;
195 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
196 video->p->memory.io[REG_STAT] = video->stat;
197 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
198}
199
200void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
201 struct GBVideo* video = context;
202 GBVideoProcessDots(video);
203 if (GBRegisterSTATIsHblankIRQ(video->stat)) {
204 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
205 GBUpdateIRQs(video->p);
206 }
207 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
208 video->p->memory.hdmaRemaining = 0x10;
209 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
210 }
211 video->mode = 0;
212 video->modeEvent.callback = _endMode0;
213 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
214 video->p->memory.io[REG_STAT] = video->stat;
215 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 11;
216 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
217}
218
219void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
220 UNUSED(cyclesLate);
221 struct GBVideo* video = context;
222 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
223 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
224 return;
225 }
226
227 GBFrameEnded(video->p);
228 --video->frameskipCounter;
229 if (video->frameskipCounter < 0) {
230 mCoreSyncPostFrame(video->p->sync);
231 video->frameskipCounter = video->frameskip;
232 }
233 ++video->frameCounter;
234
235 // TODO: Move to common code
236 if (video->p->stream && video->p->stream->postVideoFrame) {
237 const color_t* pixels;
238 size_t stride;
239 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
240 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
241 }
242
243 struct mCoreCallbacks* callbacks = video->p->coreCallbacks;
244 if (callbacks && callbacks->videoFrameStarted) {
245 callbacks->videoFrameStarted(callbacks->context);
246 }
247
248 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
249 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
250 }
251}
252
253static void _cleanOAM(struct GBVideo* video, int y) {
254 // TODO: GBC differences
255 // TODO: Optimize
256 video->objMax = 0;
257 int spriteHeight = 8;
258 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
259 spriteHeight = 16;
260 }
261 int o = 0;
262 int i;
263 for (i = 0; i < 40; ++i) {
264 uint8_t oy = video->oam.obj[i].y;
265 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
266 continue;
267 }
268 // TODO: Sort
269 video->objThisLine[o] = video->oam.obj[i];
270 ++o;
271 if (o == 10) {
272 break;
273 }
274 }
275 video->objMax = o;
276}
277
278void GBVideoProcessDots(struct GBVideo* video) {
279 if (video->mode != 3) {
280 return;
281 }
282 int oldX = video->x;
283 video->x = (video->p->timing.masterCycles - video->dotClock + video->p->cpu->cycles) >> video->p->doubleSpeed;
284 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
285 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
286 } else if (video->x < 0) {
287 mLOG(GB, FATAL, "Video dot clock went negative!");
288 video->x = oldX;
289 }
290 if (video->frameskipCounter <= 0) {
291 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
292 }
293}
294
295void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
296 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
297 video->mode = 2;
298 video->modeEvent.callback = _endMode2;
299 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
300 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
301
302 video->ly = 0;
303 video->p->memory.io[REG_LY] = 0;
304 // TODO: Does this read as 0 for 4 T-cycles?
305 video->stat = GBRegisterSTATSetMode(video->stat, 2);
306 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
307 if (GBRegisterSTATIsLYCIRQ(video->stat) && video->ly == video->p->memory.io[REG_LYC]) {
308 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
309 GBUpdateIRQs(video->p);
310 }
311 video->p->memory.io[REG_STAT] = video->stat;
312 mTimingDeschedule(&video->p->timing, &video->frameEvent);
313 }
314 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
315 video->stat = GBRegisterSTATSetMode(video->stat, 0);
316 video->p->memory.io[REG_STAT] = video->stat;
317 video->ly = 0;
318 video->p->memory.io[REG_LY] = 0;
319 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
320 }
321 video->p->memory.io[REG_STAT] = video->stat;
322}
323
324void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
325 video->stat = (video->stat & 0x7) | (value & 0x78);
326 if (video->p->model == GB_MODEL_DMG && video->mode == 1) {
327 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
328 GBUpdateIRQs(video->p);
329 }
330}
331
332void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
333 if (video->mode == 2) {
334 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
335 if (GBRegisterSTATIsLYCIRQ(video->stat) && value == video->ly) {
336 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
337 GBUpdateIRQs(video->p);
338 }
339 }
340}
341
342void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
343 static const uint16_t dmgPalette[4] = { 0x7FFF, 0x56B5, 0x294A, 0x0000};
344 if (video->p->model < GB_MODEL_CGB) {
345 switch (address) {
346 case REG_BGP:
347 video->palette[0] = dmgPalette[value & 3];
348 video->palette[1] = dmgPalette[(value >> 2) & 3];
349 video->palette[2] = dmgPalette[(value >> 4) & 3];
350 video->palette[3] = dmgPalette[(value >> 6) & 3];
351 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
352 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
353 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
354 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
355 break;
356 case REG_OBP0:
357 video->palette[8 * 4 + 0] = dmgPalette[value & 3];
358 video->palette[8 * 4 + 1] = dmgPalette[(value >> 2) & 3];
359 video->palette[8 * 4 + 2] = dmgPalette[(value >> 4) & 3];
360 video->palette[8 * 4 + 3] = dmgPalette[(value >> 6) & 3];
361 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
362 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
363 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
364 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
365 break;
366 case REG_OBP1:
367 video->palette[9 * 4 + 0] = dmgPalette[value & 3];
368 video->palette[9 * 4 + 1] = dmgPalette[(value >> 2) & 3];
369 video->palette[9 * 4 + 2] = dmgPalette[(value >> 4) & 3];
370 video->palette[9 * 4 + 3] = dmgPalette[(value >> 6) & 3];
371 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
372 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
373 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
374 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
375 break;
376 }
377 } else {
378 switch (address) {
379 case REG_BCPD:
380 if (video->bcpIndex & 1) {
381 video->palette[video->bcpIndex >> 1] &= 0x00FF;
382 video->palette[video->bcpIndex >> 1] |= value << 8;
383 } else {
384 video->palette[video->bcpIndex >> 1] &= 0xFF00;
385 video->palette[video->bcpIndex >> 1] |= value;
386 }
387 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
388 if (video->bcpIncrement) {
389 ++video->bcpIndex;
390 video->bcpIndex &= 0x3F;
391 video->p->memory.io[REG_BCPS] &= 0x80;
392 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
393 }
394 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
395 break;
396 case REG_OCPD:
397 if (video->ocpIndex & 1) {
398 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
399 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
400 } else {
401 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
402 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
403 }
404 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
405 if (video->ocpIncrement) {
406 ++video->ocpIndex;
407 video->ocpIndex &= 0x3F;
408 video->p->memory.io[REG_OCPS] &= 0x80;
409 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
410 }
411 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
412 break;
413 }
414 }
415}
416
417void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
418 value &= 1;
419 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
420 video->vramCurrentBank = value;
421}
422
423static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model) {
424 UNUSED(renderer);
425 UNUSED(model);
426 // Nothing to do
427}
428
429static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
430 UNUSED(renderer);
431 // Nothing to do
432}
433
434static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
435 UNUSED(renderer);
436 UNUSED(address);
437 return value;
438}
439
440static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
441 if (renderer->cache) {
442 mTileCacheWriteVRAM(renderer->cache, address);
443 }
444}
445
446static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
447 UNUSED(value);
448 if (renderer->cache) {
449 mTileCacheWritePalette(renderer->cache, index << 1);
450 }
451}
452
453static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
454 UNUSED(renderer);
455 UNUSED(endX);
456 UNUSED(startX);
457 UNUSED(y);
458 UNUSED(obj);
459 UNUSED(oamMax);
460 // Nothing to do
461}
462
463static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
464 UNUSED(renderer);
465 UNUSED(y);
466 // Nothing to do
467}
468
469static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
470 UNUSED(renderer);
471 // Nothing to do
472}
473
474static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
475 UNUSED(renderer);
476 UNUSED(stride);
477 UNUSED(pixels);
478 // Nothing to do
479}
480
481static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
482 UNUSED(renderer);
483 UNUSED(stride);
484 UNUSED(pixels);
485 // Nothing to do
486}
487
488void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
489 STORE_16LE(video->x, 0, &state->video.x);
490 STORE_16LE(video->ly, 0, &state->video.ly);
491 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
492 state->video.vramCurrentBank = video->vramCurrentBank;
493
494 GBSerializedVideoFlags flags = 0;
495 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
496 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
497 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
498 state->video.flags = flags;
499 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
500 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
501
502 size_t i;
503 for (i = 0; i < 64; ++i) {
504 STORE_16LE(video->palette[i], i * 2, state->video.palette);
505 }
506
507 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
508 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
509}
510
511void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
512 LOAD_16LE(video->x, 0, &state->video.x);
513 LOAD_16LE(video->ly, 0, &state->video.ly);
514 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
515 video->vramCurrentBank = state->video.vramCurrentBank;
516
517 GBSerializedVideoFlags flags = state->video.flags;
518 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
519 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
520 video->mode = GBSerializedVideoFlagsGetMode(flags);
521 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
522 video->bcpIndex &= 0x3F;
523 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
524 video->ocpIndex &= 0x3F;
525
526 size_t i;
527 for (i = 0; i < 64; ++i) {
528 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
529 video->renderer->writePalette(video->renderer, i, video->palette[i]);
530 }
531
532 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
533 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
534
535 _cleanOAM(video, video->ly);
536 GBVideoSwitchBank(video, video->vramCurrentBank);
537}