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