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/sm83/sm83.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(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 GBVideoSkipBIOS(struct GBVideo* video) {
218 video->mode = 1;
219 video->modeEvent.callback = _endMode1;
220
221 int32_t next;
222 if (video->p->model == GB_MODEL_CGB) {
223 video->ly = GB_VIDEO_VERTICAL_PIXELS;
224 video->p->memory.io[REG_LY] = video->ly;
225 video->stat = GBRegisterSTATClearLYC(video->stat);
226 next = 20;
227 } else {
228 video->ly = GB_VIDEO_VERTICAL_TOTAL_PIXELS;
229 video->p->memory.io[REG_LY] = 0;
230 next = 56;
231 }
232 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
233
234 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
235 GBUpdateIRQs(video->p);
236 video->p->memory.io[REG_STAT] = video->stat;
237 mTimingDeschedule(&video->p->timing, &video->modeEvent);
238 mTimingSchedule(&video->p->timing, &video->modeEvent, next);
239}
240
241void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
242 struct GBVideo* video = context;
243 if (video->frameskipCounter <= 0) {
244 video->renderer->finishScanline(video->renderer, video->ly);
245 }
246 int lyc = video->p->memory.io[REG_LYC];
247 int32_t next;
248 ++video->ly;
249 video->p->memory.io[REG_LY] = video->ly;
250 GBRegisterSTAT oldStat = video->stat;
251 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
252 next = GB_VIDEO_MODE_2_LENGTH;
253 video->mode = 2;
254 video->modeEvent.callback = _endMode2;
255 } else {
256 next = GB_VIDEO_HORIZONTAL_LENGTH;
257 video->mode = 1;
258 video->modeEvent.callback = _endMode1;
259
260 mTimingDeschedule(&video->p->timing, &video->frameEvent);
261 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
262
263 if (!_statIRQAsserted(oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
264 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
265 }
266 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
267 }
268 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
269 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
270 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
271 }
272
273 // LYC stat is delayed 1 T-cycle
274 oldStat = video->stat;
275 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
276 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
277 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
278 }
279
280 GBUpdateIRQs(video->p);
281 video->p->memory.io[REG_STAT] = video->stat;
282 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
283}
284
285void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
286 struct GBVideo* video = context;
287 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
288 return;
289 }
290 int lyc = video->p->memory.io[REG_LYC];
291 // TODO: One M-cycle delay
292 ++video->ly;
293 int32_t next;
294 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
295 video->ly = 0;
296 video->p->memory.io[REG_LY] = video->ly;
297 next = GB_VIDEO_MODE_2_LENGTH;
298 video->mode = 2;
299 video->modeEvent.callback = _endMode2;
300 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
301 video->p->memory.io[REG_LY] = 0;
302 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
303 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
304 video->p->memory.io[REG_LY] = video->ly;
305 next = 8;
306 } else {
307 video->p->memory.io[REG_LY] = video->ly;
308 next = GB_VIDEO_HORIZONTAL_LENGTH;
309 }
310
311 GBRegisterSTAT oldStat = video->stat;
312 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
313 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
314 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
315 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
316 GBUpdateIRQs(video->p);
317 }
318 video->p->memory.io[REG_STAT] = video->stat;
319 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
320}
321
322void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
323 struct GBVideo* video = context;
324 _cleanOAM(video, video->ly);
325 video->x = -(video->p->memory.io[REG_SCX] & 7);
326 video->dotClock = mTimingCurrentTime(timing) - cyclesLate + 5 - (video->x << video->p->doubleSpeed);
327 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - video->x;
328 video->mode = 3;
329 video->modeEvent.callback = _endMode3;
330 GBRegisterSTAT oldStat = video->stat;
331 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
332 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
333 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
334 GBUpdateIRQs(video->p);
335 }
336 video->p->memory.io[REG_STAT] = video->stat;
337 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
338}
339
340void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
341 struct GBVideo* video = context;
342 GBVideoProcessDots(video, cyclesLate);
343 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
344 video->p->memory.hdmaRemaining = 0x10;
345 video->p->cpuBlocked = true;
346 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
347 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
348 }
349 video->mode = 0;
350 video->modeEvent.callback = _endMode0;
351 GBRegisterSTAT oldStat = video->stat;
352 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
353 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
354 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
355 GBUpdateIRQs(video->p);
356 }
357 video->p->memory.io[REG_STAT] = video->stat;
358 // TODO: Cache SCX & 7 in case it changes
359 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
360 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
361}
362
363void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
364 UNUSED(cyclesLate);
365 struct GBVideo* video = context;
366 if (video->p->cpu->executionState != SM83_CORE_FETCH) {
367 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
368 return;
369 }
370 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
371 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
372 }
373
374 --video->frameskipCounter;
375 if (video->frameskipCounter < 0) {
376 video->renderer->finishFrame(video->renderer);
377 video->frameskipCounter = video->frameskip;
378 }
379 GBFrameEnded(video->p);
380 mCoreSyncPostFrame(video->p->sync);
381 ++video->frameCounter;
382
383 GBFrameStarted(video->p);
384}
385
386static void _cleanOAM(struct GBVideo* video, int y) {
387 // TODO: GBC differences
388 // TODO: Optimize
389 video->objMax = 0;
390 int spriteHeight = 8;
391 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
392 spriteHeight = 16;
393 }
394 int o = 0;
395 int i;
396 for (i = 0; i < 40; ++i) {
397 uint8_t oy = video->oam.obj[i].y;
398 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
399 continue;
400 }
401 // TODO: Sort
402 video->objThisLine[o] = video->oam.obj[i];
403 ++o;
404 if (o == 10) {
405 break;
406 }
407 }
408 video->objMax = o;
409}
410
411void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
412 if (video->mode != 3) {
413 return;
414 }
415 int oldX = video->x;
416 video->x = (int32_t) (mTimingCurrentTime(&video->p->timing) - cyclesLate - video->dotClock) >> video->p->doubleSpeed;
417 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
418 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
419 } else if (video->x < 0) {
420 return;
421 }
422 if (oldX < 0) {
423 oldX = 0;
424 }
425 if (video->frameskipCounter <= 0) {
426 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
427 }
428}
429
430void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
431 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
432 video->mode = 2;
433 video->modeEvent.callback = _endMode2;
434 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
435 mTimingDeschedule(&video->p->timing, &video->modeEvent);
436 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
437
438 video->ly = 0;
439 video->p->memory.io[REG_LY] = 0;
440 GBRegisterSTAT oldStat = video->stat;
441 video->stat = GBRegisterSTATSetMode(video->stat, 0);
442 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
443 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
444 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
445 GBUpdateIRQs(video->p);
446 }
447 video->p->memory.io[REG_STAT] = video->stat;
448 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
449
450 mTimingDeschedule(&video->p->timing, &video->frameEvent);
451 }
452 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
453 // TODO: Fix serialization; this gets internal and visible modes out of sync
454 video->mode = 0;
455 video->stat = GBRegisterSTATSetMode(video->stat, 0);
456 video->p->memory.io[REG_STAT] = video->stat;
457 video->ly = 0;
458 video->p->memory.io[REG_LY] = 0;
459 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
460
461 mTimingDeschedule(&video->p->timing, &video->modeEvent);
462 mTimingDeschedule(&video->p->timing, &video->frameEvent);
463 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
464 }
465 video->p->memory.io[REG_STAT] = video->stat;
466}
467
468void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
469 GBRegisterSTAT oldStat = video->stat;
470 video->stat = (video->stat & 0x7) | (value & 0x78);
471 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
472 return;
473 }
474 if (!_statIRQAsserted(oldStat) && video->mode < 3) {
475 // TODO: variable for the IRQ line value?
476 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
477 GBUpdateIRQs(video->p);
478 }
479}
480
481void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
482 GBRegisterSTAT oldStat = video->stat;
483 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
484 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
485 if (!_statIRQAsserted(oldStat) && _statIRQAsserted(video->stat)) {
486 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
487 GBUpdateIRQs(video->p);
488 }
489 }
490 video->p->memory.io[REG_STAT] = video->stat;
491}
492
493void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
494 if (video->p->model < GB_MODEL_SGB) {
495 switch (address) {
496 case REG_BGP:
497 video->palette[0] = video->dmgPalette[value & 3];
498 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
499 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
500 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
501 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
502 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
503 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
504 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
505 break;
506 case REG_OBP0:
507 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
508 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
509 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
510 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
511 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
512 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
513 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
514 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
515 break;
516 case REG_OBP1:
517 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
518 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
519 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
520 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
521 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
522 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
523 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
524 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
525 break;
526 }
527 } else if (video->p->model & GB_MODEL_SGB) {
528 video->renderer->writeVideoRegister(video->renderer, address, value);
529 } else {
530 switch (address) {
531 case REG_BCPD:
532 if (video->mode != 3) {
533 if (video->bcpIndex & 1) {
534 video->palette[video->bcpIndex >> 1] &= 0x00FF;
535 video->palette[video->bcpIndex >> 1] |= value << 8;
536 } else {
537 video->palette[video->bcpIndex >> 1] &= 0xFF00;
538 video->palette[video->bcpIndex >> 1] |= value;
539 }
540 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
541 }
542 if (video->bcpIncrement) {
543 ++video->bcpIndex;
544 video->bcpIndex &= 0x3F;
545 video->p->memory.io[REG_BCPS] &= 0x80;
546 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
547 }
548 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
549 break;
550 case REG_OCPD:
551 if (video->mode != 3) {
552 if (video->ocpIndex & 1) {
553 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
554 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
555 } else {
556 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
557 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
558 }
559 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
560 }
561 if (video->ocpIncrement) {
562 ++video->ocpIndex;
563 video->ocpIndex &= 0x3F;
564 video->p->memory.io[REG_OCPS] &= 0x80;
565 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
566 }
567 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
568 break;
569 }
570 }
571}
572
573void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
574 value &= 1;
575 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
576 video->vramCurrentBank = value;
577}
578
579void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
580 if (index >= 12) {
581 return;
582 }
583 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
584}
585
586void GBVideoDisableCGB(struct GBVideo* video) {
587 video->dmgPalette[0] = video->palette[0];
588 video->dmgPalette[1] = video->palette[1];
589 video->dmgPalette[2] = video->palette[2];
590 video->dmgPalette[3] = video->palette[3];
591 video->dmgPalette[4] = video->palette[8 * 4 + 0];
592 video->dmgPalette[5] = video->palette[8 * 4 + 1];
593 video->dmgPalette[6] = video->palette[8 * 4 + 2];
594 video->dmgPalette[7] = video->palette[8 * 4 + 3];
595 video->dmgPalette[8] = video->palette[9 * 4 + 0];
596 video->dmgPalette[9] = video->palette[9 * 4 + 1];
597 video->dmgPalette[10] = video->palette[9 * 4 + 2];
598 video->dmgPalette[11] = video->palette[9 * 4 + 3];
599 video->renderer->deinit(video->renderer);
600 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
601}
602
603void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
604 int i;
605 if (!(video->sgbCommandHeader & 7)) {
606 video->sgbBufferIndex = 0;
607 if ((data[0] >> 3) > SGB_OBJ_TRN) {
608 video->sgbCommandHeader = 0;
609 return;
610 }
611 video->sgbCommandHeader = data[0];
612 }
613 --video->sgbCommandHeader;
614 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
615 ++video->sgbBufferIndex;
616 if (video->sgbCommandHeader & 7) {
617 return;
618 }
619 switch (video->sgbCommandHeader >> 3) {
620 case SGB_PAL01:
621 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
622 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
623 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
624 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
625
626 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
627 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
628 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
629 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
630
631 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
632 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
633
634 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
635 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
636 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
637 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
638 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
639 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
640 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
641 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
642 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
643 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
644 break;
645 case SGB_PAL23:
646 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
647 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
648 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
649
650 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
651 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
652 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
653 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
654 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
655 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
656 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
657 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
658 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
659 break;
660 case SGB_PAL03:
661 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
662 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
663 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
664 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
665
666 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
667 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
668
669 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
670 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
671 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
672 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
673 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
674 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
675 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
676 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
677 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
678 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
679 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
680 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
681 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
682 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
683 break;
684 case SGB_PAL12:
685 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
686 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
687 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
688
689 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
690 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
691 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
692 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
693 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
694 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
695 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
696 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
697 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
698 break;
699 case SGB_PAL_SET:
700 for (i = 0; i < 4; ++i) {
701 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
702 if (entry >= 0x200) {
703 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
704 continue;
705 }
706 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
707 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
708 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
709 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
710 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
711 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
712 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
713 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
714 }
715 break;
716 case SGB_ATTR_BLK:
717 case SGB_ATTR_DIV:
718 case SGB_ATTR_CHR:
719 case SGB_ATTR_LIN:
720 case SGB_PAL_TRN:
721 case SGB_ATRC_EN:
722 case SGB_CHR_TRN:
723 case SGB_PCT_TRN:
724 case SGB_ATTR_TRN:
725 case SGB_ATTR_SET:
726 break;
727 case SGB_MLT_REQ:
728 if ((video->sgbPacketBuffer[1] & 0x3) == 2) { // XXX: This unmasked increment appears to be an SGB hardware bug
729 ++video->p->sgbCurrentController;
730 }
731 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
732 video->p->sgbCurrentController &= video->p->sgbControllers;
733 return;
734 case SGB_MASK_EN:
735 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
736 break;
737 default:
738 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
739 return;
740 }
741 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
742}
743
744static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
745 UNUSED(renderer);
746 UNUSED(model);
747 UNUSED(borders);
748 // Nothing to do
749}
750
751static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
752 UNUSED(renderer);
753 // Nothing to do
754}
755
756static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
757 if (renderer->cache) {
758 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
759 }
760 return value;
761}
762
763static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
764 UNUSED(renderer);
765 UNUSED(data);
766}
767
768static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
769 if (renderer->cache) {
770 mCacheSetWriteVRAM(renderer->cache, address);
771 }
772}
773
774static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
775 UNUSED(renderer);
776 UNUSED(oam);
777 // Nothing to do
778}
779
780static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
781 if (renderer->cache) {
782 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
783 }
784}
785
786static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
787 UNUSED(renderer);
788 UNUSED(endX);
789 UNUSED(startX);
790 UNUSED(y);
791 UNUSED(obj);
792 UNUSED(oamMax);
793 // Nothing to do
794}
795
796static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
797 UNUSED(renderer);
798 UNUSED(y);
799 // Nothing to do
800}
801
802static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
803 UNUSED(renderer);
804 // Nothing to do
805}
806
807static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
808 UNUSED(renderer);
809 UNUSED(enable);
810 // Nothing to do
811}
812
813static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
814 UNUSED(renderer);
815 UNUSED(stride);
816 UNUSED(pixels);
817 // Nothing to do
818}
819
820static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
821 UNUSED(renderer);
822 UNUSED(stride);
823 UNUSED(pixels);
824 // Nothing to do
825}
826
827void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
828 STORE_16LE(video->x, 0, &state->video.x);
829 STORE_16LE(video->ly, 0, &state->video.ly);
830 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
831 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
832 state->video.vramCurrentBank = video->vramCurrentBank;
833
834 GBSerializedVideoFlags flags = 0;
835 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
836 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
837 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
838 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
839 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
840 state->video.flags = flags;
841 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
842 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
843
844 size_t i;
845 for (i = 0; i < 64; ++i) {
846 STORE_16LE(video->palette[i], i * 2, state->video.palette);
847 }
848
849 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
850 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
851
852 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
853 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
854}
855
856void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
857 LOAD_16LE(video->x, 0, &state->video.x);
858 LOAD_16LE(video->ly, 0, &state->video.ly);
859 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
860 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
861 video->vramCurrentBank = state->video.vramCurrentBank;
862
863 GBSerializedVideoFlags flags = state->video.flags;
864 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
865 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
866 video->mode = GBSerializedVideoFlagsGetMode(flags);
867 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
868 video->bcpIndex &= 0x3F;
869 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
870 video->ocpIndex &= 0x3F;
871
872 switch (video->mode) {
873 case 0:
874 video->modeEvent.callback = _endMode0;
875 break;
876 case 1:
877 video->modeEvent.callback = _endMode1;
878 break;
879 case 2:
880 video->modeEvent.callback = _endMode2;
881 break;
882 case 3:
883 video->modeEvent.callback = _endMode3;
884 break;
885 }
886
887 uint32_t when;
888 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
889 LOAD_32LE(when, 0, &state->video.nextMode);
890 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
891 }
892 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
893 LOAD_32LE(when, 0, &state->video.nextFrame);
894 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
895 }
896
897 video->renderer->deinit(video->renderer);
898 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
899
900 size_t i;
901 for (i = 0; i < 64; ++i) {
902 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
903 video->renderer->writePalette(video->renderer, i, video->palette[i]);
904 }
905
906 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
907 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
908
909 _cleanOAM(video, video->ly);
910 GBVideoSwitchBank(video, video->vramCurrentBank);
911}