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 GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
30static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
31
32static void _cleanOAM(struct GBVideo* video, int y);
33
34static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
35static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
36static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
37static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
38static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
39
40static struct GBVideoRenderer dummyRenderer = {
41 .init = GBVideoDummyRendererInit,
42 .deinit = GBVideoDummyRendererDeinit,
43 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
44 .writeSGBPacket = GBVideoDummyRendererWriteSGBPacket,
45 .writeVRAM = GBVideoDummyRendererWriteVRAM,
46 .writeOAM = GBVideoDummyRendererWriteOAM,
47 .writePalette = GBVideoDummyRendererWritePalette,
48 .drawRange = GBVideoDummyRendererDrawRange,
49 .finishScanline = GBVideoDummyRendererFinishScanline,
50 .finishFrame = GBVideoDummyRendererFinishFrame,
51 .getPixels = GBVideoDummyRendererGetPixels,
52 .putPixels = GBVideoDummyRendererPutPixels,
53};
54
55void GBVideoInit(struct GBVideo* video) {
56 video->renderer = &dummyRenderer;
57 video->renderer->cache = NULL;
58 video->renderer->sgbRenderMode = 0;
59 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
60 video->frameskip = 0;
61
62 video->modeEvent.context = video;
63 video->modeEvent.name = "GB Video Mode";
64 video->modeEvent.callback = NULL;
65 video->modeEvent.priority = 8;
66 video->frameEvent.context = video;
67 video->frameEvent.name = "GB Video Frame";
68 video->frameEvent.callback = _updateFrameCount;
69 video->frameEvent.priority = 9;
70
71 video->dmgPalette[0] = 0x7FFF;
72 video->dmgPalette[1] = 0x56B5;
73 video->dmgPalette[2] = 0x294A;
74 video->dmgPalette[3] = 0x0000;
75 video->dmgPalette[4] = 0x7FFF;
76 video->dmgPalette[5] = 0x56B5;
77 video->dmgPalette[6] = 0x294A;
78 video->dmgPalette[7] = 0x0000;
79 video->dmgPalette[8] = 0x7FFF;
80 video->dmgPalette[9] = 0x56B5;
81 video->dmgPalette[10] = 0x294A;
82 video->dmgPalette[11] = 0x0000;
83
84 video->sgbBorders = true;
85
86 video->renderer->sgbCharRam = NULL;
87 video->renderer->sgbMapRam = NULL;
88 video->renderer->sgbPalRam = NULL;
89 video->renderer->sgbAttributes = NULL;
90 video->renderer->sgbAttributeFiles = NULL;
91}
92
93void GBVideoReset(struct GBVideo* video) {
94 video->ly = 0;
95 video->x = 0;
96 video->mode = 1;
97 video->stat = 1;
98
99 video->frameCounter = 0;
100 video->frameskipCounter = 0;
101
102 GBVideoSwitchBank(video, 0);
103 video->renderer->vram = video->vram;
104 memset(&video->oam, 0, sizeof(video->oam));
105 video->renderer->oam = &video->oam;
106 memset(&video->palette, 0, sizeof(video->palette));
107
108 if (video->p->model == GB_MODEL_SGB) {
109 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
110 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
111 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
112 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
113 video->renderer->sgbAttributes = malloc(90 * 45);
114 memset(video->renderer->sgbAttributes, 0, 90 * 45);
115 video->sgbCommandHeader = 0;
116 video->sgbBufferIndex = 0;
117 }
118
119 video->palette[0] = video->dmgPalette[0];
120 video->palette[1] = video->dmgPalette[1];
121 video->palette[2] = video->dmgPalette[2];
122 video->palette[3] = video->dmgPalette[3];
123 video->palette[8 * 4 + 0] = video->dmgPalette[4];
124 video->palette[8 * 4 + 1] = video->dmgPalette[5];
125 video->palette[8 * 4 + 2] = video->dmgPalette[6];
126 video->palette[8 * 4 + 3] = video->dmgPalette[7];
127 video->palette[9 * 4 + 0] = video->dmgPalette[8];
128 video->palette[9 * 4 + 1] = video->dmgPalette[9];
129 video->palette[9 * 4 + 2] = video->dmgPalette[10];
130 video->palette[9 * 4 + 3] = video->dmgPalette[11];
131
132 video->renderer->deinit(video->renderer);
133 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
134
135 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
136 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
137 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
138 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
139 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
140 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
141 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
142 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
143 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
144 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
145 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
146 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
147}
148
149void GBVideoDeinit(struct GBVideo* video) {
150 video->renderer->deinit(video->renderer);
151 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
152 if (video->renderer->sgbCharRam) {
153 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
154 video->renderer->sgbCharRam = NULL;
155 }
156 if (video->renderer->sgbMapRam) {
157 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
158 video->renderer->sgbMapRam = NULL;
159 }
160 if (video->renderer->sgbPalRam) {
161 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
162 video->renderer->sgbPalRam = NULL;
163 }
164 if (video->renderer->sgbAttributeFiles) {
165 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
166 video->renderer->sgbAttributeFiles = NULL;
167 }
168 if (video->renderer->sgbAttributes) {
169 free(video->renderer->sgbAttributes);
170 video->renderer->sgbAttributes = NULL;
171 }
172}
173
174void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
175 video->renderer->deinit(video->renderer);
176 renderer->cache = video->renderer->cache;
177 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
178 renderer->sgbCharRam = video->renderer->sgbCharRam;
179 renderer->sgbMapRam = video->renderer->sgbMapRam;
180 renderer->sgbPalRam = video->renderer->sgbPalRam;
181 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
182 renderer->sgbAttributes = video->renderer->sgbAttributes;
183 video->renderer = renderer;
184 renderer->vram = video->vram;
185 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
186}
187
188static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
189 // TODO: variable for the IRQ line value?
190 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
191 return true;
192 }
193 switch (GBRegisterSTATGetMode(stat)) {
194 case 0:
195 if (GBRegisterSTATIsHblankIRQ(stat)) {
196 return true;
197 }
198 break;
199 case 1:
200 if (GBRegisterSTATIsVblankIRQ(stat)) {
201 return true;
202 }
203 break;
204 case 2:
205 if (GBRegisterSTATIsOAMIRQ(stat)) {
206 return true;
207 }
208 break;
209 case 3:
210 break;
211 }
212 return false;
213}
214
215void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
216 struct GBVideo* video = context;
217 if (video->frameskipCounter <= 0) {
218 video->renderer->finishScanline(video->renderer, video->ly);
219 }
220 int lyc = video->p->memory.io[REG_LYC];
221 int32_t next;
222 ++video->ly;
223 video->p->memory.io[REG_LY] = video->ly;
224 GBRegisterSTAT oldStat = video->stat;
225 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
226 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
227 // TODO: Cache SCX & 7 in case it changes during mode 2
228 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
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 GBUpdateIRQs(video->p);
249 video->p->memory.io[REG_STAT] = video->stat;
250 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
251}
252
253void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
254 struct GBVideo* video = context;
255 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
256 return;
257 }
258 int lyc = video->p->memory.io[REG_LYC];
259 // TODO: One M-cycle delay
260 ++video->ly;
261 int32_t next;
262 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
263 video->ly = 0;
264 video->p->memory.io[REG_LY] = video->ly;
265 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
266 video->mode = 2;
267 video->modeEvent.callback = _endMode2;
268 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
269 video->p->memory.io[REG_LY] = 0;
270 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
271 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
272 video->p->memory.io[REG_LY] = video->ly;
273 next = 8;
274 } else {
275 video->p->memory.io[REG_LY] = video->ly;
276 next = GB_VIDEO_HORIZONTAL_LENGTH;
277 }
278
279 GBRegisterSTAT oldStat = video->stat;
280 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
281 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
282 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
283 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
284 GBUpdateIRQs(video->p);
285 }
286 video->p->memory.io[REG_STAT] = video->stat;
287 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
288}
289
290void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
291 struct GBVideo* video = context;
292 _cleanOAM(video, video->ly);
293 video->x = 0;
294 video->dotClock = mTimingCurrentTime(timing) - cyclesLate;
295 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
296 video->mode = 3;
297 video->modeEvent.callback = _endMode3;
298 GBRegisterSTAT oldStat = video->stat;
299 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
300 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
301 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
302 GBUpdateIRQs(video->p);
303 }
304 video->p->memory.io[REG_STAT] = video->stat;
305 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
306}
307
308void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
309 struct GBVideo* video = context;
310 GBVideoProcessDots(video, cyclesLate);
311 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
312 video->p->memory.hdmaRemaining = 0x10;
313 video->p->cpuBlocked = true;
314 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
315 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
316 }
317 video->mode = 0;
318 video->modeEvent.callback = _endMode0;
319 GBRegisterSTAT oldStat = video->stat;
320 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
321 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
322 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
323 GBUpdateIRQs(video->p);
324 }
325 video->p->memory.io[REG_STAT] = video->stat;
326 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6;
327 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
328}
329
330void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
331 UNUSED(cyclesLate);
332 struct GBVideo* video = context;
333 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
334 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
335 return;
336 }
337
338 size_t c;
339 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
340 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
341 if (callbacks->videoFrameEnded) {
342 callbacks->videoFrameEnded(callbacks->context);
343 }
344 }
345
346 GBFrameEnded(video->p);
347 mCoreSyncPostFrame(video->p->sync);
348 --video->frameskipCounter;
349 if (video->frameskipCounter < 0) {
350 video->renderer->finishFrame(video->renderer);
351 video->frameskipCounter = video->frameskip;
352 }
353 ++video->frameCounter;
354
355 // TODO: Move to common code
356 if (video->p->stream && video->p->stream->postVideoFrame) {
357 const color_t* pixels;
358 size_t stride;
359 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
360 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
361 }
362
363 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
364 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
365 }
366
367 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
368 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
369 if (callbacks->videoFrameStarted) {
370 callbacks->videoFrameStarted(callbacks->context);
371 }
372 }
373}
374
375static void _cleanOAM(struct GBVideo* video, int y) {
376 // TODO: GBC differences
377 // TODO: Optimize
378 video->objMax = 0;
379 int spriteHeight = 8;
380 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
381 spriteHeight = 16;
382 }
383 int o = 0;
384 int i;
385 for (i = 0; i < 40; ++i) {
386 uint8_t oy = video->oam.obj[i].y;
387 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
388 continue;
389 }
390 // TODO: Sort
391 video->objThisLine[o] = video->oam.obj[i];
392 ++o;
393 if (o == 10) {
394 break;
395 }
396 }
397 video->objMax = o;
398}
399
400void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
401 if (video->mode != 3) {
402 return;
403 }
404 int oldX = video->x;
405 video->x = (mTimingCurrentTime(&video->p->timing) - video->dotClock - cyclesLate) >> video->p->doubleSpeed;
406 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
407 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
408 } else if (video->x < 0) {
409 mLOG(GB, FATAL, "Video dot clock went negative!");
410 video->x = oldX;
411 }
412 if (video->frameskipCounter <= 0) {
413 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
414 }
415}
416
417void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
418 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
419 video->mode = 2;
420 video->modeEvent.callback = _endMode2;
421 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
422 mTimingDeschedule(&video->p->timing, &video->modeEvent);
423 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
424
425 video->ly = 0;
426 video->p->memory.io[REG_LY] = 0;
427 GBRegisterSTAT oldStat = video->stat;
428 video->stat = GBRegisterSTATSetMode(video->stat, 0);
429 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
430 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
431 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
432 GBUpdateIRQs(video->p);
433 }
434 video->p->memory.io[REG_STAT] = video->stat;
435 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
436
437 mTimingDeschedule(&video->p->timing, &video->frameEvent);
438 }
439 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
440 // TODO: Fix serialization; this gets internal and visible modes out of sync
441 video->mode = 0;
442 video->stat = GBRegisterSTATSetMode(video->stat, 0);
443 video->p->memory.io[REG_STAT] = video->stat;
444 video->ly = 0;
445 video->p->memory.io[REG_LY] = 0;
446 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
447
448 mTimingDeschedule(&video->p->timing, &video->modeEvent);
449 mTimingDeschedule(&video->p->timing, &video->frameEvent);
450 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
451 }
452 video->p->memory.io[REG_STAT] = video->stat;
453}
454
455void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
456 GBRegisterSTAT oldStat = video->stat;
457 video->stat = (video->stat & 0x7) | (value & 0x78);
458 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
459 return;
460 }
461 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
462 // TODO: variable for the IRQ line value?
463 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
464 GBUpdateIRQs(video->p);
465 }
466}
467
468void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
469 GBRegisterSTAT oldStat = video->stat;
470 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
471 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
472 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
473 GBUpdateIRQs(video->p);
474 }
475 video->p->memory.io[REG_STAT] = video->stat;
476}
477
478void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
479 if (video->p->model < GB_MODEL_SGB) {
480 switch (address) {
481 case REG_BGP:
482 video->palette[0] = video->dmgPalette[value & 3];
483 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
484 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
485 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
486 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
487 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
488 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
489 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
490 break;
491 case REG_OBP0:
492 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
493 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
494 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
495 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
496 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
497 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
498 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
499 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
500 break;
501 case REG_OBP1:
502 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
503 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
504 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
505 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
506 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
507 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
508 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
509 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
510 break;
511 }
512 } else if (video->p->model == GB_MODEL_SGB) {
513 video->renderer->writeVideoRegister(video->renderer, address, value);
514 } else {
515 switch (address) {
516 case REG_BCPD:
517 if (video->bcpIndex & 1) {
518 video->palette[video->bcpIndex >> 1] &= 0x00FF;
519 video->palette[video->bcpIndex >> 1] |= value << 8;
520 } else {
521 video->palette[video->bcpIndex >> 1] &= 0xFF00;
522 video->palette[video->bcpIndex >> 1] |= value;
523 }
524 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
525 if (video->bcpIncrement) {
526 ++video->bcpIndex;
527 video->bcpIndex &= 0x3F;
528 video->p->memory.io[REG_BCPS] &= 0x80;
529 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
530 }
531 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
532 break;
533 case REG_OCPD:
534 if (video->ocpIndex & 1) {
535 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
536 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
537 } else {
538 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
539 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
540 }
541 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
542 if (video->ocpIncrement) {
543 ++video->ocpIndex;
544 video->ocpIndex &= 0x3F;
545 video->p->memory.io[REG_OCPS] &= 0x80;
546 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
547 }
548 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
549 break;
550 }
551 }
552}
553
554void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
555 value &= 1;
556 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
557 video->vramCurrentBank = value;
558}
559
560void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
561 if (index >= 12) {
562 return;
563 }
564 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
565}
566
567void GBVideoDisableCGB(struct GBVideo* video) {
568 video->dmgPalette[0] = video->palette[0];
569 video->dmgPalette[1] = video->palette[1];
570 video->dmgPalette[2] = video->palette[2];
571 video->dmgPalette[3] = video->palette[3];
572 video->dmgPalette[4] = video->palette[8 * 4 + 0];
573 video->dmgPalette[5] = video->palette[8 * 4 + 1];
574 video->dmgPalette[6] = video->palette[8 * 4 + 2];
575 video->dmgPalette[7] = video->palette[8 * 4 + 3];
576 video->dmgPalette[8] = video->palette[9 * 4 + 0];
577 video->dmgPalette[9] = video->palette[9 * 4 + 1];
578 video->dmgPalette[10] = video->palette[9 * 4 + 2];
579 video->dmgPalette[11] = video->palette[9 * 4 + 3];
580 video->renderer->deinit(video->renderer);
581 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
582}
583
584void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
585 int i;
586 if (!(video->sgbCommandHeader & 7)) {
587 video->sgbBufferIndex = 0;
588 if ((data[0] >> 3) > SGB_OBJ_TRN) {
589 video->sgbCommandHeader = 0;
590 return;
591 }
592 video->sgbCommandHeader = data[0];
593 }
594 --video->sgbCommandHeader;
595 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
596 ++video->sgbBufferIndex;
597 if (video->sgbCommandHeader & 7) {
598 return;
599 }
600 switch (video->sgbCommandHeader >> 3) {
601 case SGB_PAL01:
602 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
603 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
604 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
605 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
606
607 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
608 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
609 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
610 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
611
612 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
613 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
614
615 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
616 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
617 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
618 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
619 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
620 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
621 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
622 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
623 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
624 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
625 break;
626 case SGB_PAL23:
627 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
628 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
629 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
630
631 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
632 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
633 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
634 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
635 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
636 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
637 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
638 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
639 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
640 break;
641 case SGB_PAL03:
642 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
643 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
644 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
645 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
646
647 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
648 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
649
650 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
651 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
652 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
653 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
654 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
655 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
656 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
657 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
658 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
659 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
660 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
661 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
662 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
663 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
664 break;
665 case SGB_PAL12:
666 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
667 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
668 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
669
670 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
671 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
672 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
673 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
674 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
675 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
676 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
677 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
678 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
679 break;
680 case SGB_PAL_SET:
681 for (i = 0; i < 4; ++i) {
682 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
683 if (entry >= 0x200) {
684 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
685 continue;
686 }
687 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
688 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
689 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
690 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
691 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
692 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
693 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
694 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
695 }
696 break;
697 case SGB_ATTR_BLK:
698 case SGB_ATTR_DIV:
699 case SGB_ATTR_CHR:
700 case SGB_ATTR_LIN:
701 case SGB_PAL_TRN:
702 case SGB_ATRC_EN:
703 case SGB_CHR_TRN:
704 case SGB_PCT_TRN:
705 case SGB_ATTR_TRN:
706 case SGB_ATTR_SET:
707 break;
708 case SGB_MLT_REQ:
709 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
710 video->p->sgbCurrentController = 0;
711 return;
712 case SGB_MASK_EN:
713 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
714 break;
715 default:
716 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
717 return;
718 }
719 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
720}
721
722static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
723 UNUSED(renderer);
724 UNUSED(model);
725 UNUSED(borders);
726 // Nothing to do
727}
728
729static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
730 UNUSED(renderer);
731 // Nothing to do
732}
733
734static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
735 if (renderer->cache) {
736 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
737 }
738 return value;
739}
740
741static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
742 UNUSED(renderer);
743 UNUSED(data);
744}
745
746static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
747 if (renderer->cache) {
748 mCacheSetWriteVRAM(renderer->cache, address);
749 }
750}
751
752static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
753 UNUSED(renderer);
754 UNUSED(oam);
755 // Nothing to do
756}
757
758static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
759 if (renderer->cache) {
760 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
761 }
762}
763
764static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
765 UNUSED(renderer);
766 UNUSED(endX);
767 UNUSED(startX);
768 UNUSED(y);
769 UNUSED(obj);
770 UNUSED(oamMax);
771 // Nothing to do
772}
773
774static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
775 UNUSED(renderer);
776 UNUSED(y);
777 // Nothing to do
778}
779
780static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
781 UNUSED(renderer);
782 // Nothing to do
783}
784
785static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
786 UNUSED(renderer);
787 UNUSED(stride);
788 UNUSED(pixels);
789 // Nothing to do
790}
791
792static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
793 UNUSED(renderer);
794 UNUSED(stride);
795 UNUSED(pixels);
796 // Nothing to do
797}
798
799void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
800 STORE_16LE(video->x, 0, &state->video.x);
801 STORE_16LE(video->ly, 0, &state->video.ly);
802 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
803 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
804 state->video.vramCurrentBank = video->vramCurrentBank;
805
806 GBSerializedVideoFlags flags = 0;
807 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
808 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
809 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
810 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
811 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
812 state->video.flags = flags;
813 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
814 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
815
816 size_t i;
817 for (i = 0; i < 64; ++i) {
818 STORE_16LE(video->palette[i], i * 2, state->video.palette);
819 }
820
821 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
822 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
823
824 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
825 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
826}
827
828void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
829 LOAD_16LE(video->x, 0, &state->video.x);
830 LOAD_16LE(video->ly, 0, &state->video.ly);
831 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
832 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
833 video->vramCurrentBank = state->video.vramCurrentBank;
834
835 GBSerializedVideoFlags flags = state->video.flags;
836 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
837 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
838 video->mode = GBSerializedVideoFlagsGetMode(flags);
839 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
840 video->bcpIndex &= 0x3F;
841 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
842 video->ocpIndex &= 0x3F;
843
844 switch (video->mode) {
845 case 0:
846 video->modeEvent.callback = _endMode0;
847 break;
848 case 1:
849 video->modeEvent.callback = _endMode1;
850 break;
851 case 2:
852 video->modeEvent.callback = _endMode2;
853 break;
854 case 3:
855 video->modeEvent.callback = _endMode3;
856 break;
857 }
858
859 uint32_t when;
860 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
861 LOAD_32LE(when, 0, &state->video.nextMode);
862 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
863 }
864 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
865 LOAD_32LE(when, 0, &state->video.nextFrame);
866 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
867 }
868
869 size_t i;
870 for (i = 0; i < 64; ++i) {
871 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
872 video->renderer->writePalette(video->renderer, i, video->palette[i]);
873 }
874
875 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
876 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
877
878 _cleanOAM(video, video->ly);
879 GBVideoSwitchBank(video, video->vramCurrentBank);
880
881 video->renderer->deinit(video->renderer);
882 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
883}