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, bool borders);
19static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
20static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
21static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
22static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
23static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
24static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
25static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
26static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
27static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
28static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
29static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
30
31static void _cleanOAM(struct GBVideo* video, int y);
32
33static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
34static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
35static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
36static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
37static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
38
39static struct GBVideoRenderer dummyRenderer = {
40 .init = GBVideoDummyRendererInit,
41 .deinit = GBVideoDummyRendererDeinit,
42 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
43 .writeSGBPacket = GBVideoDummyRendererWriteSGBPacket,
44 .writeVRAM = GBVideoDummyRendererWriteVRAM,
45 .writeOAM = GBVideoDummyRendererWriteOAM,
46 .writePalette = GBVideoDummyRendererWritePalette,
47 .drawRange = GBVideoDummyRendererDrawRange,
48 .finishScanline = GBVideoDummyRendererFinishScanline,
49 .finishFrame = GBVideoDummyRendererFinishFrame,
50 .getPixels = GBVideoDummyRendererGetPixels,
51 .putPixels = GBVideoDummyRendererPutPixels,
52};
53
54void GBVideoInit(struct GBVideo* video) {
55 video->renderer = &dummyRenderer;
56 video->renderer->cache = NULL;
57 video->renderer->sgbRenderMode = 0;
58 video->vram = 0;
59 video->frameskip = 0;
60
61 video->modeEvent.context = video;
62 video->modeEvent.name = "GB Video Mode";
63 video->modeEvent.callback = NULL;
64 video->modeEvent.priority = 8;
65 video->frameEvent.context = video;
66 video->frameEvent.name = "GB Video Frame";
67 video->frameEvent.callback = _updateFrameCount;
68 video->frameEvent.priority = 9;
69
70 video->dmgPalette[0] = 0x7FFF;
71 video->dmgPalette[1] = 0x56B5;
72 video->dmgPalette[2] = 0x294A;
73 video->dmgPalette[3] = 0x0000;
74
75 video->sgbBorders = true;
76
77 video->renderer->sgbCharRam = NULL;
78 video->renderer->sgbMapRam = NULL;
79 video->renderer->sgbPalRam = NULL;
80 video->renderer->sgbAttributes = NULL;
81 video->renderer->sgbAttributeFiles = NULL;
82}
83
84void GBVideoReset(struct GBVideo* video) {
85 video->ly = 0;
86 video->x = 0;
87 video->mode = 1;
88 video->stat = 1;
89
90 video->frameCounter = 0;
91 video->frameskipCounter = 0;
92
93 if (video->vram) {
94 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
95 }
96 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
97 GBVideoSwitchBank(video, 0);
98 video->renderer->vram = video->vram;
99 memset(&video->oam, 0, sizeof(video->oam));
100 video->renderer->oam = &video->oam;
101 memset(&video->palette, 0, sizeof(video->palette));
102
103 if (video->p->model == GB_MODEL_SGB) {
104 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
105 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
106 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
107 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
108 video->renderer->sgbAttributes = malloc(90 * 45);
109 memset(video->renderer->sgbAttributes, 0, 90 * 45);
110 video->sgbCommandHeader = 0;
111 }
112
113 video->palette[0] = video->dmgPalette[0];
114 video->palette[1] = video->dmgPalette[1];
115 video->palette[2] = video->dmgPalette[2];
116 video->palette[3] = video->dmgPalette[3];
117 video->palette[8 * 4 + 0] = video->dmgPalette[0];
118 video->palette[8 * 4 + 1] = video->dmgPalette[1];
119 video->palette[8 * 4 + 2] = video->dmgPalette[2];
120 video->palette[8 * 4 + 3] = video->dmgPalette[3];
121 video->palette[9 * 4 + 0] = video->dmgPalette[0];
122 video->palette[9 * 4 + 1] = video->dmgPalette[1];
123 video->palette[9 * 4 + 2] = video->dmgPalette[2];
124 video->palette[9 * 4 + 3] = video->dmgPalette[3];
125
126 video->renderer->deinit(video->renderer);
127 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
128
129 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
130 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
131 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
132 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
133 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
134 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
135 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
136 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
137 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
138 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
139 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
140 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
141}
142
143void GBVideoDeinit(struct GBVideo* video) {
144 GBVideoAssociateRenderer(video, &dummyRenderer);
145 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
146 if (video->renderer->sgbCharRam) {
147 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
148 video->renderer->sgbCharRam = NULL;
149 }
150 if (video->renderer->sgbMapRam) {
151 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
152 video->renderer->sgbMapRam = NULL;
153 }
154 if (video->renderer->sgbPalRam) {
155 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
156 video->renderer->sgbPalRam = NULL;
157 }
158 if (video->renderer->sgbAttributeFiles) {
159 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
160 video->renderer->sgbAttributeFiles = NULL;
161 }
162 if (video->renderer->sgbAttributes) {
163 free(video->renderer->sgbAttributes);
164 video->renderer->sgbAttributes = NULL;
165 }
166}
167
168void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
169 video->renderer->deinit(video->renderer);
170 renderer->cache = video->renderer->cache;
171 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
172 renderer->sgbCharRam = video->renderer->sgbCharRam;
173 renderer->sgbMapRam = video->renderer->sgbMapRam;
174 renderer->sgbPalRam = video->renderer->sgbPalRam;
175 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
176 renderer->sgbAttributes = video->renderer->sgbAttributes;
177 video->renderer = renderer;
178 renderer->vram = video->vram;
179 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
180}
181
182static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
183 // TODO: variable for the IRQ line value?
184 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
185 return true;
186 }
187 switch (GBRegisterSTATGetMode(stat)) {
188 case 0:
189 if (GBRegisterSTATIsHblankIRQ(stat)) {
190 return true;
191 }
192 break;
193 case 1:
194 if (GBRegisterSTATIsVblankIRQ(stat)) {
195 return true;
196 }
197 break;
198 case 2:
199 if (GBRegisterSTATIsOAMIRQ(stat)) {
200 return true;
201 }
202 break;
203 case 3:
204 break;
205 }
206 return false;
207}
208
209void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
210 struct GBVideo* video = context;
211 if (video->frameskipCounter <= 0) {
212 video->renderer->finishScanline(video->renderer, video->ly);
213 }
214 int lyc = video->p->memory.io[REG_LYC];
215 int32_t next;
216 ++video->ly;
217 video->p->memory.io[REG_LY] = video->ly;
218 GBRegisterSTAT oldStat = video->stat;
219 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
220 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
221 // TODO: Cache SCX & 7 in case it changes during mode 2
222 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
223 video->mode = 2;
224 video->modeEvent.callback = _endMode2;
225 } else {
226 next = GB_VIDEO_HORIZONTAL_LENGTH;
227 video->mode = 1;
228 video->modeEvent.callback = _endMode1;
229
230 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
231
232 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
233 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
234 }
235 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
236 }
237 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
238 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
239 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
240 }
241 GBUpdateIRQs(video->p);
242 video->p->memory.io[REG_STAT] = video->stat;
243 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
244}
245
246void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
247 struct GBVideo* video = context;
248 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
249 return;
250 }
251 int lyc = video->p->memory.io[REG_LYC];
252 // TODO: One M-cycle delay
253 ++video->ly;
254 int32_t next;
255 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
256 video->ly = 0;
257 video->p->memory.io[REG_LY] = video->ly;
258 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
259 video->mode = 2;
260 video->modeEvent.callback = _endMode2;
261 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
262 video->p->memory.io[REG_LY] = 0;
263 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
264 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
265 video->p->memory.io[REG_LY] = video->ly;
266 next = 8;
267 } else {
268 video->p->memory.io[REG_LY] = video->ly;
269 next = GB_VIDEO_HORIZONTAL_LENGTH;
270 }
271
272 GBRegisterSTAT oldStat = video->stat;
273 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
274 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
275 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
276 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
277 GBUpdateIRQs(video->p);
278 }
279 video->p->memory.io[REG_STAT] = video->stat;
280 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
281}
282
283void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
284 struct GBVideo* video = context;
285 _cleanOAM(video, video->ly);
286 video->x = 0;
287 video->dotClock = mTimingCurrentTime(timing) - cyclesLate;
288 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
289 video->mode = 3;
290 video->modeEvent.callback = _endMode3;
291 GBRegisterSTAT oldStat = video->stat;
292 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
293 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
294 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
295 GBUpdateIRQs(video->p);
296 }
297 video->p->memory.io[REG_STAT] = video->stat;
298 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
299}
300
301void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
302 struct GBVideo* video = context;
303 GBVideoProcessDots(video);
304 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
305 video->p->memory.hdmaRemaining = 0x10;
306 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
307 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
308 }
309 video->mode = 0;
310 video->modeEvent.callback = _endMode0;
311 GBRegisterSTAT oldStat = video->stat;
312 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
313 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
314 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
315 GBUpdateIRQs(video->p);
316 }
317 video->p->memory.io[REG_STAT] = video->stat;
318 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6;
319 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
320}
321
322void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
323 UNUSED(cyclesLate);
324 struct GBVideo* video = context;
325 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
326 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
327 return;
328 }
329
330 size_t c;
331 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
332 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
333 if (callbacks->videoFrameEnded) {
334 callbacks->videoFrameEnded(callbacks->context);
335 }
336 }
337
338 GBFrameEnded(video->p);
339 --video->frameskipCounter;
340 if (video->frameskipCounter < 0) {
341 video->renderer->finishFrame(video->renderer);
342 mCoreSyncPostFrame(video->p->sync);
343 video->frameskipCounter = video->frameskip;
344 }
345 ++video->frameCounter;
346
347 // TODO: Move to common code
348 if (video->p->stream && video->p->stream->postVideoFrame) {
349 const color_t* pixels;
350 size_t stride;
351 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
352 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
353 }
354
355 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
356 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
357 }
358
359 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
360 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
361 if (callbacks->videoFrameStarted) {
362 callbacks->videoFrameStarted(callbacks->context);
363 }
364 }
365}
366
367static void _cleanOAM(struct GBVideo* video, int y) {
368 // TODO: GBC differences
369 // TODO: Optimize
370 video->objMax = 0;
371 int spriteHeight = 8;
372 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
373 spriteHeight = 16;
374 }
375 int o = 0;
376 int i;
377 for (i = 0; i < 40; ++i) {
378 uint8_t oy = video->oam.obj[i].y;
379 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
380 continue;
381 }
382 // TODO: Sort
383 video->objThisLine[o] = video->oam.obj[i];
384 ++o;
385 if (o == 10) {
386 break;
387 }
388 }
389 video->objMax = o;
390}
391
392void GBVideoProcessDots(struct GBVideo* video) {
393 if (video->mode != 3) {
394 return;
395 }
396 int oldX = video->x;
397 video->x = (video->p->timing.masterCycles - video->dotClock + video->p->cpu->cycles) >> video->p->doubleSpeed;
398 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
399 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
400 } else if (video->x < 0) {
401 mLOG(GB, FATAL, "Video dot clock went negative!");
402 video->x = oldX;
403 }
404 if (video->frameskipCounter <= 0) {
405 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
406 }
407}
408
409void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
410 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
411 video->mode = 2;
412 video->modeEvent.callback = _endMode2;
413 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
414 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
415
416 video->ly = 0;
417 video->p->memory.io[REG_LY] = 0;
418 // TODO: Does this read as 0 for 4 T-cycles?
419 GBRegisterSTAT oldStat = video->stat;
420 video->stat = GBRegisterSTATSetMode(video->stat, 2);
421 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
422 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
423 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
424 GBUpdateIRQs(video->p);
425 }
426 video->p->memory.io[REG_STAT] = video->stat;
427 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
428
429 mTimingDeschedule(&video->p->timing, &video->frameEvent);
430 }
431 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
432 // TODO: Fix serialization; this gets internal and visible modes out of sync
433 video->stat = GBRegisterSTATSetMode(video->stat, 0);
434 video->p->memory.io[REG_STAT] = video->stat;
435 video->ly = 0;
436 video->p->memory.io[REG_LY] = 0;
437 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
438
439 mTimingDeschedule(&video->p->timing, &video->modeEvent);
440 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
441 }
442 video->p->memory.io[REG_STAT] = video->stat;
443}
444
445void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
446 GBRegisterSTAT oldStat = video->stat;
447 video->stat = (video->stat & 0x7) | (value & 0x78);
448 if (video->p->model < GB_MODEL_CGB && !_statIRQAsserted(video, oldStat) && video->mode < 3) {
449 // TODO: variable for the IRQ line value?
450 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
451 GBUpdateIRQs(video->p);
452 }
453}
454
455void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
456 GBRegisterSTAT oldStat = video->stat;
457 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
458 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
459 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
460 GBUpdateIRQs(video->p);
461 }
462 video->p->memory.io[REG_STAT] = video->stat;
463}
464
465void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
466 if (video->p->model < GB_MODEL_SGB) {
467 switch (address) {
468 case REG_BGP:
469 video->palette[0] = video->dmgPalette[value & 3];
470 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
471 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
472 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
473 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
474 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
475 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
476 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
477 break;
478 case REG_OBP0:
479 video->palette[8 * 4 + 0] = video->dmgPalette[value & 3];
480 video->palette[8 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
481 video->palette[8 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
482 video->palette[8 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
483 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
484 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
485 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
486 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
487 break;
488 case REG_OBP1:
489 video->palette[9 * 4 + 0] = video->dmgPalette[value & 3];
490 video->palette[9 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
491 video->palette[9 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
492 video->palette[9 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
493 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
494 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
495 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
496 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
497 break;
498 }
499 } else if (video->p->model == GB_MODEL_SGB) {
500 video->renderer->writeVideoRegister(video->renderer, address, value);
501 } else {
502 switch (address) {
503 case REG_BCPD:
504 if (video->bcpIndex & 1) {
505 video->palette[video->bcpIndex >> 1] &= 0x00FF;
506 video->palette[video->bcpIndex >> 1] |= value << 8;
507 } else {
508 video->palette[video->bcpIndex >> 1] &= 0xFF00;
509 video->palette[video->bcpIndex >> 1] |= value;
510 }
511 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
512 if (video->bcpIncrement) {
513 ++video->bcpIndex;
514 video->bcpIndex &= 0x3F;
515 video->p->memory.io[REG_BCPS] &= 0x80;
516 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
517 }
518 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
519 break;
520 case REG_OCPD:
521 if (video->ocpIndex & 1) {
522 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
523 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
524 } else {
525 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
526 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
527 }
528 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
529 if (video->ocpIncrement) {
530 ++video->ocpIndex;
531 video->ocpIndex &= 0x3F;
532 video->p->memory.io[REG_OCPS] &= 0x80;
533 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
534 }
535 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
536 break;
537 }
538 }
539}
540
541void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
542 value &= 1;
543 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
544 video->vramCurrentBank = value;
545}
546
547void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
548 if (index >= 4) {
549 return;
550 }
551 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
552}
553
554void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
555 int i;
556 if (!(video->sgbCommandHeader & 7)) {
557 if ((data[0] >> 3) > SGB_OBJ_TRN) {
558 video->sgbCommandHeader = 0;
559 return;
560 }
561 video->sgbCommandHeader = data[0];
562 }
563 --video->sgbCommandHeader;
564 switch (video->sgbCommandHeader >> 3) {
565 case SGB_PAL01:
566 video->palette[0] = data[1] | (data[2] << 8);
567 video->palette[1] = data[3] | (data[4] << 8);
568 video->palette[2] = data[5] | (data[6] << 8);
569 video->palette[3] = data[7] | (data[8] << 8);
570
571 video->palette[16] = data[1] | (data[2] << 8);
572 video->palette[17] = data[9] | (data[10] << 8);
573 video->palette[18] = data[11] | (data[12] << 8);
574 video->palette[19] = data[13] | (data[14] << 8);
575
576 video->palette[32] = data[1] | (data[2] << 8);
577 video->palette[48] = data[1] | (data[2] << 8);
578
579 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
580 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
581 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
582 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
583 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
584 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
585 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
586 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
587 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
588 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
589 break;
590 case SGB_PAL23:
591 video->palette[33] = data[3] | (data[4] << 8);
592 video->palette[34] = data[5] | (data[6] << 8);
593 video->palette[35] = data[7] | (data[8] << 8);
594
595 video->palette[49] = data[9] | (data[10] << 8);
596 video->palette[50] = data[11] | (data[12] << 8);
597 video->palette[51] = data[13] | (data[14] << 8);
598 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
599 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
600 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
601 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
602 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
603 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
604 break;
605 case SGB_PAL03:
606 video->palette[0] = data[1] | (data[2] << 8);
607 video->palette[1] = data[3] | (data[4] << 8);
608 video->palette[2] = data[5] | (data[6] << 8);
609 video->palette[3] = data[7] | (data[8] << 8);
610
611 video->palette[16] = data[1] | (data[2] << 8);
612 video->palette[32] = data[1] | (data[2] << 8);
613
614 video->palette[48] = data[1] | (data[2] << 8);
615 video->palette[49] = data[9] | (data[10] << 8);
616 video->palette[50] = data[11] | (data[12] << 8);
617 video->palette[51] = data[13] | (data[14] << 8);
618 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
619 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
620 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
621 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
622 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
623 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
624 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
625 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
626 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
627 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
628 break;
629 case SGB_PAL12:
630 video->palette[17] = data[3] | (data[4] << 8);
631 video->palette[18] = data[5] | (data[6] << 8);
632 video->palette[19] = data[7] | (data[8] << 8);
633
634 video->palette[33] = data[9] | (data[10] << 8);
635 video->palette[34] = data[11] | (data[12] << 8);
636 video->palette[35] = data[13] | (data[14] << 8);
637 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
638 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
639 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
640 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
641 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
642 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
643 break;
644 case SGB_PAL_SET:
645 for (i = 0; i < 4; ++i) {
646 uint16_t entry = (data[2 + (i * 2)] << 8) | data[1 + (i * 2)];
647 if (entry >= 0x200) {
648 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
649 continue;
650 }
651 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
652 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[0]);
653 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
654 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
655 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
656 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
657 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
658 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
659 }
660 break;
661 case SGB_ATTR_BLK:
662 case SGB_PAL_TRN:
663 case SGB_ATRC_EN:
664 case SGB_CHR_TRN:
665 case SGB_PCT_TRN:
666 case SGB_ATTR_TRN:
667 case SGB_ATTR_SET:
668 break;
669 case SGB_MLT_REG:
670 return;
671 case SGB_MASK_EN:
672 video->renderer->sgbRenderMode = data[1] & 0x3;
673 break;
674 default:
675 mLOG(GB, STUB, "Unimplemented SGB command: %02X", data[0] >> 3);
676 return;
677 }
678 video->renderer->writeSGBPacket(video->renderer, data);
679}
680
681static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
682 UNUSED(renderer);
683 UNUSED(model);
684 UNUSED(borders);
685 // Nothing to do
686}
687
688static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
689 UNUSED(renderer);
690 // Nothing to do
691}
692
693static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
694 UNUSED(renderer);
695 UNUSED(address);
696 return value;
697}
698
699static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
700 UNUSED(renderer);
701 UNUSED(data);
702}
703
704static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
705 if (renderer->cache) {
706 mTileCacheWriteVRAM(renderer->cache, address);
707 }
708}
709
710static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
711 UNUSED(renderer);
712 UNUSED(oam);
713 // Nothing to do
714}
715
716static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
717 UNUSED(value);
718 if (renderer->cache) {
719 mTileCacheWritePalette(renderer->cache, index << 1);
720 }
721}
722
723static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
724 UNUSED(renderer);
725 UNUSED(endX);
726 UNUSED(startX);
727 UNUSED(y);
728 UNUSED(obj);
729 UNUSED(oamMax);
730 // Nothing to do
731}
732
733static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
734 UNUSED(renderer);
735 UNUSED(y);
736 // Nothing to do
737}
738
739static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
740 UNUSED(renderer);
741 // Nothing to do
742}
743
744static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
745 UNUSED(renderer);
746 UNUSED(stride);
747 UNUSED(pixels);
748 // Nothing to do
749}
750
751static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
752 UNUSED(renderer);
753 UNUSED(stride);
754 UNUSED(pixels);
755 // Nothing to do
756}
757
758void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
759 STORE_16LE(video->x, 0, &state->video.x);
760 STORE_16LE(video->ly, 0, &state->video.ly);
761 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
762 state->video.vramCurrentBank = video->vramCurrentBank;
763
764 GBSerializedVideoFlags flags = 0;
765 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
766 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
767 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
768 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
769 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
770 state->video.flags = flags;
771 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
772 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
773
774 size_t i;
775 for (i = 0; i < 64; ++i) {
776 STORE_16LE(video->palette[i], i * 2, state->video.palette);
777 }
778
779 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
780 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
781
782 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
783 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
784}
785
786void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
787 LOAD_16LE(video->x, 0, &state->video.x);
788 LOAD_16LE(video->ly, 0, &state->video.ly);
789 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
790 video->vramCurrentBank = state->video.vramCurrentBank;
791
792 GBSerializedVideoFlags flags = state->video.flags;
793 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
794 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
795 video->mode = GBSerializedVideoFlagsGetMode(flags);
796 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
797 video->bcpIndex &= 0x3F;
798 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
799 video->ocpIndex &= 0x3F;
800
801 switch (video->mode) {
802 case 0:
803 video->modeEvent.callback = _endMode0;
804 break;
805 case 1:
806 video->modeEvent.callback = _endMode1;
807 break;
808 case 2:
809 video->modeEvent.callback = _endMode2;
810 break;
811 case 3:
812 video->modeEvent.callback = _endMode3;
813 break;
814 }
815
816 uint32_t when;
817 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
818 LOAD_32LE(when, 0, &state->video.nextMode);
819 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
820 }
821 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
822 LOAD_32LE(when, 0, &state->video.nextFrame);
823 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
824 }
825
826 size_t i;
827 for (i = 0; i < 64; ++i) {
828 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
829 video->renderer->writePalette(video->renderer, i, video->palette[i]);
830 }
831
832 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
833 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
834
835 _cleanOAM(video, video->ly);
836 GBVideoSwitchBank(video, video->vramCurrentBank);
837
838 video->renderer->deinit(video->renderer);
839 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
840}