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/cache-set.h>
11#include <mgba/internal/gb/gb.h>
12#include <mgba/internal/gb/io.h>
13#include <mgba/internal/gb/renderers/cache-set.h>
14#include <mgba/internal/gb/serialize.h>
15#include <mgba/internal/lr35902/lr35902.h>
16
17#include <mgba-util/memory.h>
18
19static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
20static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
21static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
22static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
23static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
24static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
25static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
26static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
27static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
28static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
29static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable);
30static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
31static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
32
33static void _cleanOAM(struct GBVideo* video, int y);
34
35static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
36static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
37static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
38static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
39static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
40
41static struct GBVideoRenderer dummyRenderer = {
42 .init = GBVideoDummyRendererInit,
43 .deinit = GBVideoDummyRendererDeinit,
44 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
45 .writeSGBPacket = GBVideoDummyRendererWriteSGBPacket,
46 .writeVRAM = GBVideoDummyRendererWriteVRAM,
47 .writeOAM = GBVideoDummyRendererWriteOAM,
48 .writePalette = GBVideoDummyRendererWritePalette,
49 .drawRange = GBVideoDummyRendererDrawRange,
50 .finishScanline = GBVideoDummyRendererFinishScanline,
51 .finishFrame = GBVideoDummyRendererFinishFrame,
52 .enableSGBBorder = GBVideoDummyRendererEnableSGBBorder,
53 .getPixels = GBVideoDummyRendererGetPixels,
54 .putPixels = GBVideoDummyRendererPutPixels,
55};
56
57void GBVideoInit(struct GBVideo* video) {
58 video->renderer = &dummyRenderer;
59 video->renderer->cache = NULL;
60 video->renderer->sgbRenderMode = 0;
61 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
62 video->frameskip = 0;
63
64 video->modeEvent.context = video;
65 video->modeEvent.name = "GB Video Mode";
66 video->modeEvent.callback = NULL;
67 video->modeEvent.priority = 8;
68 video->frameEvent.context = video;
69 video->frameEvent.name = "GB Video Frame";
70 video->frameEvent.callback = _updateFrameCount;
71 video->frameEvent.priority = 9;
72
73 video->dmgPalette[0] = 0x7FFF;
74 video->dmgPalette[1] = 0x56B5;
75 video->dmgPalette[2] = 0x294A;
76 video->dmgPalette[3] = 0x0000;
77 video->dmgPalette[4] = 0x7FFF;
78 video->dmgPalette[5] = 0x56B5;
79 video->dmgPalette[6] = 0x294A;
80 video->dmgPalette[7] = 0x0000;
81 video->dmgPalette[8] = 0x7FFF;
82 video->dmgPalette[9] = 0x56B5;
83 video->dmgPalette[10] = 0x294A;
84 video->dmgPalette[11] = 0x0000;
85
86 video->sgbBorders = true;
87
88 video->renderer->sgbCharRam = NULL;
89 video->renderer->sgbMapRam = NULL;
90 video->renderer->sgbPalRam = NULL;
91 video->renderer->sgbAttributes = NULL;
92 video->renderer->sgbAttributeFiles = NULL;
93}
94
95void GBVideoReset(struct GBVideo* video) {
96 video->ly = 0;
97 video->x = 0;
98 video->mode = 1;
99 video->stat = 1;
100
101 video->frameCounter = 0;
102 video->frameskipCounter = 0;
103
104 GBVideoSwitchBank(video, 0);
105 video->renderer->vram = video->vram;
106 memset(&video->oam, 0, sizeof(video->oam));
107 video->renderer->oam = &video->oam;
108 memset(&video->palette, 0, sizeof(video->palette));
109
110 if (video->p->model & GB_MODEL_SGB) {
111 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
112 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
113 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
114 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
115 video->renderer->sgbAttributes = malloc(90 * 45);
116 memset(video->renderer->sgbAttributes, 0, 90 * 45);
117 video->sgbCommandHeader = 0;
118 video->sgbBufferIndex = 0;
119 }
120
121 video->palette[0] = video->dmgPalette[0];
122 video->palette[1] = video->dmgPalette[1];
123 video->palette[2] = video->dmgPalette[2];
124 video->palette[3] = video->dmgPalette[3];
125 video->palette[8 * 4 + 0] = video->dmgPalette[4];
126 video->palette[8 * 4 + 1] = video->dmgPalette[5];
127 video->palette[8 * 4 + 2] = video->dmgPalette[6];
128 video->palette[8 * 4 + 3] = video->dmgPalette[7];
129 video->palette[9 * 4 + 0] = video->dmgPalette[8];
130 video->palette[9 * 4 + 1] = video->dmgPalette[9];
131 video->palette[9 * 4 + 2] = video->dmgPalette[10];
132 video->palette[9 * 4 + 3] = video->dmgPalette[11];
133
134 video->renderer->deinit(video->renderer);
135 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
136
137 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
138 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
139 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
140 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
141 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
142 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
143 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
144 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
145 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
146 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
147 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
148 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
149}
150
151void GBVideoDeinit(struct GBVideo* video) {
152 video->renderer->deinit(video->renderer);
153 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
154 if (video->renderer->sgbCharRam) {
155 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
156 video->renderer->sgbCharRam = NULL;
157 }
158 if (video->renderer->sgbMapRam) {
159 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
160 video->renderer->sgbMapRam = NULL;
161 }
162 if (video->renderer->sgbPalRam) {
163 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
164 video->renderer->sgbPalRam = NULL;
165 }
166 if (video->renderer->sgbAttributeFiles) {
167 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
168 video->renderer->sgbAttributeFiles = NULL;
169 }
170 if (video->renderer->sgbAttributes) {
171 free(video->renderer->sgbAttributes);
172 video->renderer->sgbAttributes = NULL;
173 }
174}
175
176void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
177 video->renderer->deinit(video->renderer);
178 renderer->cache = video->renderer->cache;
179 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
180 renderer->sgbCharRam = video->renderer->sgbCharRam;
181 renderer->sgbMapRam = video->renderer->sgbMapRam;
182 renderer->sgbPalRam = video->renderer->sgbPalRam;
183 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
184 renderer->sgbAttributes = video->renderer->sgbAttributes;
185 video->renderer = renderer;
186 renderer->vram = video->vram;
187 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
188}
189
190static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
191 // TODO: variable for the IRQ line value?
192 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
193 return true;
194 }
195 switch (GBRegisterSTATGetMode(stat)) {
196 case 0:
197 if (GBRegisterSTATIsHblankIRQ(stat)) {
198 return true;
199 }
200 break;
201 case 1:
202 if (GBRegisterSTATIsVblankIRQ(stat)) {
203 return true;
204 }
205 break;
206 case 2:
207 if (GBRegisterSTATIsOAMIRQ(stat)) {
208 return true;
209 }
210 break;
211 case 3:
212 break;
213 }
214 return false;
215}
216
217void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
218 struct GBVideo* video = context;
219 if (video->frameskipCounter <= 0) {
220 video->renderer->finishScanline(video->renderer, video->ly);
221 }
222 int lyc = video->p->memory.io[REG_LYC];
223 int32_t next;
224 ++video->ly;
225 video->p->memory.io[REG_LY] = video->ly;
226 GBRegisterSTAT oldStat = video->stat;
227 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
228 next = GB_VIDEO_MODE_2_LENGTH;
229 video->mode = 2;
230 video->modeEvent.callback = _endMode2;
231 } else {
232 next = GB_VIDEO_HORIZONTAL_LENGTH;
233 video->mode = 1;
234 video->modeEvent.callback = _endMode1;
235
236 mTimingDeschedule(&video->p->timing, &video->frameEvent);
237 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
238
239 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
240 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
241 }
242 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
243 }
244 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
245 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
246 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
247 }
248
249 // LYC stat is delayed 1 T-cycle
250 oldStat = video->stat;
251 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
252 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
253 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
254 }
255
256 GBUpdateIRQs(video->p);
257 video->p->memory.io[REG_STAT] = video->stat;
258 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
259}
260
261void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
262 struct GBVideo* video = context;
263 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
264 return;
265 }
266 int lyc = video->p->memory.io[REG_LYC];
267 // TODO: One M-cycle delay
268 ++video->ly;
269 int32_t next;
270 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
271 video->ly = 0;
272 video->p->memory.io[REG_LY] = video->ly;
273 next = GB_VIDEO_MODE_2_LENGTH;
274 video->mode = 2;
275 video->modeEvent.callback = _endMode2;
276 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
277 video->p->memory.io[REG_LY] = 0;
278 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
279 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
280 video->p->memory.io[REG_LY] = video->ly;
281 next = 8;
282 } else {
283 video->p->memory.io[REG_LY] = video->ly;
284 next = GB_VIDEO_HORIZONTAL_LENGTH;
285 }
286
287 GBRegisterSTAT oldStat = video->stat;
288 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
289 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
290 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
291 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
292 GBUpdateIRQs(video->p);
293 }
294 video->p->memory.io[REG_STAT] = video->stat;
295 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
296}
297
298void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
299 struct GBVideo* video = context;
300 _cleanOAM(video, video->ly);
301 video->x = -(video->p->memory.io[REG_SCX] & 7);
302 video->dotClock = mTimingCurrentTime(timing) - cyclesLate + 5 - (video->x << video->p->doubleSpeed);
303 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - video->x;
304 video->mode = 3;
305 video->modeEvent.callback = _endMode3;
306 GBRegisterSTAT oldStat = video->stat;
307 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
308 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
309 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
310 GBUpdateIRQs(video->p);
311 }
312 video->p->memory.io[REG_STAT] = video->stat;
313 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
314}
315
316void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
317 struct GBVideo* video = context;
318 GBVideoProcessDots(video, cyclesLate);
319 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
320 video->p->memory.hdmaRemaining = 0x10;
321 video->p->cpuBlocked = true;
322 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
323 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
324 }
325 video->mode = 0;
326 video->modeEvent.callback = _endMode0;
327 GBRegisterSTAT oldStat = video->stat;
328 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
329 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
330 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
331 GBUpdateIRQs(video->p);
332 }
333 video->p->memory.io[REG_STAT] = video->stat;
334 // TODO: Cache SCX & 7 in case it changes
335 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
336 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
337}
338
339void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
340 UNUSED(cyclesLate);
341 struct GBVideo* video = context;
342 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
343 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
344 return;
345 }
346
347 GBFrameEnded(video->p);
348 mCoreSyncPostFrame(video->p->sync);
349 --video->frameskipCounter;
350 if (video->frameskipCounter < 0) {
351 video->renderer->finishFrame(video->renderer);
352 video->frameskipCounter = video->frameskip;
353 }
354 ++video->frameCounter;
355
356 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
357 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
358 }
359 GBFrameStarted(video->p);
360}
361
362static void _cleanOAM(struct GBVideo* video, int y) {
363 // TODO: GBC differences
364 // TODO: Optimize
365 video->objMax = 0;
366 int spriteHeight = 8;
367 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
368 spriteHeight = 16;
369 }
370 int o = 0;
371 int i;
372 for (i = 0; i < 40; ++i) {
373 uint8_t oy = video->oam.obj[i].y;
374 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
375 continue;
376 }
377 // TODO: Sort
378 video->objThisLine[o] = video->oam.obj[i];
379 ++o;
380 if (o == 10) {
381 break;
382 }
383 }
384 video->objMax = o;
385}
386
387void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
388 if (video->mode != 3) {
389 return;
390 }
391 int oldX = video->x;
392 video->x = (int32_t) (mTimingCurrentTime(&video->p->timing) - cyclesLate - video->dotClock) >> video->p->doubleSpeed;
393 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
394 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
395 } else if (video->x < 0) {
396 return;
397 }
398 if (oldX < 0) {
399 oldX = 0;
400 }
401 if (video->frameskipCounter <= 0) {
402 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
403 }
404}
405
406void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
407 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
408 video->mode = 2;
409 video->modeEvent.callback = _endMode2;
410 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
411 mTimingDeschedule(&video->p->timing, &video->modeEvent);
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 GBRegisterSTAT oldStat = video->stat;
417 video->stat = GBRegisterSTATSetMode(video->stat, 0);
418 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
419 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
420 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
421 GBUpdateIRQs(video->p);
422 }
423 video->p->memory.io[REG_STAT] = video->stat;
424 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
425
426 mTimingDeschedule(&video->p->timing, &video->frameEvent);
427 }
428 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
429 // TODO: Fix serialization; this gets internal and visible modes out of sync
430 video->mode = 0;
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 mTimingDeschedule(&video->p->timing, &video->frameEvent);
439 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
440 }
441 video->p->memory.io[REG_STAT] = video->stat;
442}
443
444void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
445 GBRegisterSTAT oldStat = video->stat;
446 video->stat = (video->stat & 0x7) | (value & 0x78);
447 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
448 return;
449 }
450 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
451 // TODO: variable for the IRQ line value?
452 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
453 GBUpdateIRQs(video->p);
454 }
455}
456
457void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
458 GBRegisterSTAT oldStat = video->stat;
459 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
460 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
461 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
462 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
463 GBUpdateIRQs(video->p);
464 }
465 }
466 video->p->memory.io[REG_STAT] = video->stat;
467}
468
469void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
470 if (video->p->model < GB_MODEL_SGB) {
471 switch (address) {
472 case REG_BGP:
473 video->palette[0] = video->dmgPalette[value & 3];
474 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
475 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
476 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
477 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
478 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
479 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
480 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
481 break;
482 case REG_OBP0:
483 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
484 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
485 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
486 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
487 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
488 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
489 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
490 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
491 break;
492 case REG_OBP1:
493 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
494 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
495 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
496 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
497 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
498 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
499 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
500 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
501 break;
502 }
503 } else if (video->p->model & GB_MODEL_SGB) {
504 video->renderer->writeVideoRegister(video->renderer, address, value);
505 } else {
506 switch (address) {
507 case REG_BCPD:
508 if (video->bcpIndex & 1) {
509 video->palette[video->bcpIndex >> 1] &= 0x00FF;
510 video->palette[video->bcpIndex >> 1] |= value << 8;
511 } else {
512 video->palette[video->bcpIndex >> 1] &= 0xFF00;
513 video->palette[video->bcpIndex >> 1] |= value;
514 }
515 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
516 if (video->bcpIncrement) {
517 ++video->bcpIndex;
518 video->bcpIndex &= 0x3F;
519 video->p->memory.io[REG_BCPS] &= 0x80;
520 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
521 }
522 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
523 break;
524 case REG_OCPD:
525 if (video->ocpIndex & 1) {
526 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
527 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
528 } else {
529 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
530 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
531 }
532 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
533 if (video->ocpIncrement) {
534 ++video->ocpIndex;
535 video->ocpIndex &= 0x3F;
536 video->p->memory.io[REG_OCPS] &= 0x80;
537 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
538 }
539 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
540 break;
541 }
542 }
543}
544
545void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
546 value &= 1;
547 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
548 video->vramCurrentBank = value;
549}
550
551void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
552 if (index >= 12) {
553 return;
554 }
555 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
556}
557
558void GBVideoDisableCGB(struct GBVideo* video) {
559 video->dmgPalette[0] = video->palette[0];
560 video->dmgPalette[1] = video->palette[1];
561 video->dmgPalette[2] = video->palette[2];
562 video->dmgPalette[3] = video->palette[3];
563 video->dmgPalette[4] = video->palette[8 * 4 + 0];
564 video->dmgPalette[5] = video->palette[8 * 4 + 1];
565 video->dmgPalette[6] = video->palette[8 * 4 + 2];
566 video->dmgPalette[7] = video->palette[8 * 4 + 3];
567 video->dmgPalette[8] = video->palette[9 * 4 + 0];
568 video->dmgPalette[9] = video->palette[9 * 4 + 1];
569 video->dmgPalette[10] = video->palette[9 * 4 + 2];
570 video->dmgPalette[11] = video->palette[9 * 4 + 3];
571 video->renderer->deinit(video->renderer);
572 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
573}
574
575void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
576 int i;
577 if (!(video->sgbCommandHeader & 7)) {
578 video->sgbBufferIndex = 0;
579 if ((data[0] >> 3) > SGB_OBJ_TRN) {
580 video->sgbCommandHeader = 0;
581 return;
582 }
583 video->sgbCommandHeader = data[0];
584 }
585 --video->sgbCommandHeader;
586 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
587 ++video->sgbBufferIndex;
588 if (video->sgbCommandHeader & 7) {
589 return;
590 }
591 switch (video->sgbCommandHeader >> 3) {
592 case SGB_PAL01:
593 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
594 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
595 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
596 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
597
598 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
599 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
600 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
601 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
602
603 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
604 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
605
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, 4, video->palette[4]);
611 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
612 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
613 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
614 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
615 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
616 break;
617 case SGB_PAL23:
618 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
619 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
620 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
621
622 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
623 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
624 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
625 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
626 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
627 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
628 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
629 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
630 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
631 break;
632 case SGB_PAL03:
633 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
634 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
635 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
636 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
637
638 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
639 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
640
641 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
642 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
643 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
644 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
645 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
646 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
647 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
648 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
649 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
650 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
651 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
652 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
653 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
654 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
655 break;
656 case SGB_PAL12:
657 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
658 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
659 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
660
661 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
662 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
663 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
664 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
665 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
666 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
667 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
668 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
669 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
670 break;
671 case SGB_PAL_SET:
672 for (i = 0; i < 4; ++i) {
673 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
674 if (entry >= 0x200) {
675 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
676 continue;
677 }
678 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
679 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
680 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
681 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
682 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
683 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
684 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
685 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
686 }
687 break;
688 case SGB_ATTR_BLK:
689 case SGB_ATTR_DIV:
690 case SGB_ATTR_CHR:
691 case SGB_ATTR_LIN:
692 case SGB_PAL_TRN:
693 case SGB_ATRC_EN:
694 case SGB_CHR_TRN:
695 case SGB_PCT_TRN:
696 case SGB_ATTR_TRN:
697 case SGB_ATTR_SET:
698 break;
699 case SGB_MLT_REQ:
700 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
701 video->p->sgbCurrentController = 0;
702 return;
703 case SGB_MASK_EN:
704 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
705 break;
706 default:
707 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
708 return;
709 }
710 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
711}
712
713static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
714 UNUSED(renderer);
715 UNUSED(model);
716 UNUSED(borders);
717 // Nothing to do
718}
719
720static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
721 UNUSED(renderer);
722 // Nothing to do
723}
724
725static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
726 if (renderer->cache) {
727 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
728 }
729 return value;
730}
731
732static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
733 UNUSED(renderer);
734 UNUSED(data);
735}
736
737static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
738 if (renderer->cache) {
739 mCacheSetWriteVRAM(renderer->cache, address);
740 }
741}
742
743static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
744 UNUSED(renderer);
745 UNUSED(oam);
746 // Nothing to do
747}
748
749static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
750 if (renderer->cache) {
751 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
752 }
753}
754
755static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
756 UNUSED(renderer);
757 UNUSED(endX);
758 UNUSED(startX);
759 UNUSED(y);
760 UNUSED(obj);
761 UNUSED(oamMax);
762 // Nothing to do
763}
764
765static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
766 UNUSED(renderer);
767 UNUSED(y);
768 // Nothing to do
769}
770
771static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
772 UNUSED(renderer);
773 // Nothing to do
774}
775
776static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
777 UNUSED(renderer);
778 UNUSED(enable);
779 // Nothing to do
780}
781
782static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
783 UNUSED(renderer);
784 UNUSED(stride);
785 UNUSED(pixels);
786 // Nothing to do
787}
788
789static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
790 UNUSED(renderer);
791 UNUSED(stride);
792 UNUSED(pixels);
793 // Nothing to do
794}
795
796void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
797 STORE_16LE(video->x, 0, &state->video.x);
798 STORE_16LE(video->ly, 0, &state->video.ly);
799 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
800 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
801 state->video.vramCurrentBank = video->vramCurrentBank;
802
803 GBSerializedVideoFlags flags = 0;
804 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
805 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
806 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
807 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
808 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
809 state->video.flags = flags;
810 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
811 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
812
813 size_t i;
814 for (i = 0; i < 64; ++i) {
815 STORE_16LE(video->palette[i], i * 2, state->video.palette);
816 }
817
818 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
819 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
820
821 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
822 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
823}
824
825void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
826 LOAD_16LE(video->x, 0, &state->video.x);
827 LOAD_16LE(video->ly, 0, &state->video.ly);
828 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
829 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
830 video->vramCurrentBank = state->video.vramCurrentBank;
831
832 GBSerializedVideoFlags flags = state->video.flags;
833 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
834 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
835 video->mode = GBSerializedVideoFlagsGetMode(flags);
836 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
837 video->bcpIndex &= 0x3F;
838 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
839 video->ocpIndex &= 0x3F;
840
841 switch (video->mode) {
842 case 0:
843 video->modeEvent.callback = _endMode0;
844 break;
845 case 1:
846 video->modeEvent.callback = _endMode1;
847 break;
848 case 2:
849 video->modeEvent.callback = _endMode2;
850 break;
851 case 3:
852 video->modeEvent.callback = _endMode3;
853 break;
854 }
855
856 uint32_t when;
857 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
858 LOAD_32LE(when, 0, &state->video.nextMode);
859 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
860 }
861 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
862 LOAD_32LE(when, 0, &state->video.nextFrame);
863 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
864 }
865
866 size_t i;
867 for (i = 0; i < 64; ++i) {
868 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
869 video->renderer->writePalette(video->renderer, i, video->palette[i]);
870 }
871
872 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
873 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
874
875 _cleanOAM(video, video->ly);
876 GBVideoSwitchBank(video, video->vramCurrentBank);
877
878 video->renderer->deinit(video->renderer);
879 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
880}