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 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
228 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
229 next = GB_VIDEO_MODE_2_LENGTH;
230 video->mode = 2;
231 video->modeEvent.callback = _endMode2;
232 } else {
233 next = GB_VIDEO_HORIZONTAL_LENGTH;
234 video->mode = 1;
235 video->modeEvent.callback = _endMode1;
236
237 mTimingDeschedule(&video->p->timing, &video->frameEvent);
238 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
239
240 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
241 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
242 }
243 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
244 }
245 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
246 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
247 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
248 }
249 GBUpdateIRQs(video->p);
250 video->p->memory.io[REG_STAT] = video->stat;
251 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
252}
253
254void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
255 struct GBVideo* video = context;
256 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
257 return;
258 }
259 int lyc = video->p->memory.io[REG_LYC];
260 // TODO: One M-cycle delay
261 ++video->ly;
262 int32_t next;
263 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
264 video->ly = 0;
265 video->p->memory.io[REG_LY] = video->ly;
266 next = GB_VIDEO_MODE_2_LENGTH;
267 video->mode = 2;
268 video->modeEvent.callback = _endMode2;
269 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
270 video->p->memory.io[REG_LY] = 0;
271 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
272 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
273 video->p->memory.io[REG_LY] = video->ly;
274 next = 8;
275 } else {
276 video->p->memory.io[REG_LY] = video->ly;
277 next = GB_VIDEO_HORIZONTAL_LENGTH;
278 }
279
280 GBRegisterSTAT oldStat = video->stat;
281 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
282 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
283 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
284 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
285 GBUpdateIRQs(video->p);
286 }
287 video->p->memory.io[REG_STAT] = video->stat;
288 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
289}
290
291void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
292 struct GBVideo* video = context;
293 _cleanOAM(video, video->ly);
294 video->x = -(video->p->memory.io[REG_SCX] & 7);
295 video->dotClock = mTimingCurrentTime(timing) - cyclesLate + 5 - (video->x << video->p->doubleSpeed);
296 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - video->x;
297 video->mode = 3;
298 video->modeEvent.callback = _endMode3;
299 GBRegisterSTAT oldStat = video->stat;
300 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
301 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
302 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
303 GBUpdateIRQs(video->p);
304 }
305 video->p->memory.io[REG_STAT] = video->stat;
306 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
307}
308
309void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
310 struct GBVideo* video = context;
311 GBVideoProcessDots(video, cyclesLate);
312 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
313 video->p->memory.hdmaRemaining = 0x10;
314 video->p->cpuBlocked = true;
315 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
316 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
317 }
318 video->mode = 0;
319 video->modeEvent.callback = _endMode0;
320 GBRegisterSTAT oldStat = video->stat;
321 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
322 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
323 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
324 GBUpdateIRQs(video->p);
325 }
326 video->p->memory.io[REG_STAT] = video->stat;
327 // TODO: Cache SCX & 7 in case it changes
328 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
329 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
330}
331
332void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
333 UNUSED(cyclesLate);
334 struct GBVideo* video = context;
335 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
336 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
337 return;
338 }
339
340 size_t c;
341 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
342 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
343 if (callbacks->videoFrameEnded) {
344 callbacks->videoFrameEnded(callbacks->context);
345 }
346 }
347
348 GBFrameEnded(video->p);
349 mCoreSyncPostFrame(video->p->sync);
350 --video->frameskipCounter;
351 if (video->frameskipCounter < 0) {
352 video->renderer->finishFrame(video->renderer);
353 video->frameskipCounter = video->frameskip;
354 }
355 ++video->frameCounter;
356
357 // TODO: Move to common code
358 if (video->p->stream && video->p->stream->postVideoFrame) {
359 const color_t* pixels;
360 size_t stride;
361 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
362 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
363 }
364
365 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
366 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
367 }
368
369 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
370 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
371 if (callbacks->videoFrameStarted) {
372 callbacks->videoFrameStarted(callbacks->context);
373 }
374 }
375}
376
377static void _cleanOAM(struct GBVideo* video, int y) {
378 // TODO: GBC differences
379 // TODO: Optimize
380 video->objMax = 0;
381 int spriteHeight = 8;
382 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
383 spriteHeight = 16;
384 }
385 int o = 0;
386 int i;
387 for (i = 0; i < 40; ++i) {
388 uint8_t oy = video->oam.obj[i].y;
389 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
390 continue;
391 }
392 // TODO: Sort
393 video->objThisLine[o] = video->oam.obj[i];
394 ++o;
395 if (o == 10) {
396 break;
397 }
398 }
399 video->objMax = o;
400}
401
402void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
403 if (video->mode != 3) {
404 return;
405 }
406 int oldX = video->x;
407 video->x = (int32_t) (mTimingCurrentTime(&video->p->timing) - cyclesLate - video->dotClock) >> video->p->doubleSpeed;
408 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
409 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
410 } else if (video->x < 0) {
411 return;
412 }
413 if (oldX < 0) {
414 oldX = 0;
415 }
416 if (video->frameskipCounter <= 0) {
417 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
418 }
419}
420
421void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
422 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
423 video->mode = 2;
424 video->modeEvent.callback = _endMode2;
425 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
426 mTimingDeschedule(&video->p->timing, &video->modeEvent);
427 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
428
429 video->ly = 0;
430 video->p->memory.io[REG_LY] = 0;
431 GBRegisterSTAT oldStat = video->stat;
432 video->stat = GBRegisterSTATSetMode(video->stat, 0);
433 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
434 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
435 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
436 GBUpdateIRQs(video->p);
437 }
438 video->p->memory.io[REG_STAT] = video->stat;
439 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
440
441 mTimingDeschedule(&video->p->timing, &video->frameEvent);
442 }
443 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
444 // TODO: Fix serialization; this gets internal and visible modes out of sync
445 video->mode = 0;
446 video->stat = GBRegisterSTATSetMode(video->stat, 0);
447 video->p->memory.io[REG_STAT] = video->stat;
448 video->ly = 0;
449 video->p->memory.io[REG_LY] = 0;
450 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
451
452 mTimingDeschedule(&video->p->timing, &video->modeEvent);
453 mTimingDeschedule(&video->p->timing, &video->frameEvent);
454 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
455 }
456 video->p->memory.io[REG_STAT] = video->stat;
457}
458
459void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
460 GBRegisterSTAT oldStat = video->stat;
461 video->stat = (video->stat & 0x7) | (value & 0x78);
462 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
463 return;
464 }
465 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
466 // TODO: variable for the IRQ line value?
467 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
468 GBUpdateIRQs(video->p);
469 }
470}
471
472void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
473 GBRegisterSTAT oldStat = video->stat;
474 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
475 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
476 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
477 GBUpdateIRQs(video->p);
478 }
479 video->p->memory.io[REG_STAT] = video->stat;
480}
481
482void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
483 if (video->p->model < GB_MODEL_SGB) {
484 switch (address) {
485 case REG_BGP:
486 video->palette[0] = video->dmgPalette[value & 3];
487 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
488 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
489 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
490 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
491 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
492 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
493 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
494 break;
495 case REG_OBP0:
496 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
497 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
498 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
499 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
500 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
501 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
502 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
503 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
504 break;
505 case REG_OBP1:
506 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
507 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
508 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
509 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
510 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
511 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
512 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
513 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
514 break;
515 }
516 } else if (video->p->model == GB_MODEL_SGB) {
517 video->renderer->writeVideoRegister(video->renderer, address, value);
518 } else {
519 switch (address) {
520 case REG_BCPD:
521 if (video->bcpIndex & 1) {
522 video->palette[video->bcpIndex >> 1] &= 0x00FF;
523 video->palette[video->bcpIndex >> 1] |= value << 8;
524 } else {
525 video->palette[video->bcpIndex >> 1] &= 0xFF00;
526 video->palette[video->bcpIndex >> 1] |= value;
527 }
528 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
529 if (video->bcpIncrement) {
530 ++video->bcpIndex;
531 video->bcpIndex &= 0x3F;
532 video->p->memory.io[REG_BCPS] &= 0x80;
533 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
534 }
535 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
536 break;
537 case REG_OCPD:
538 if (video->ocpIndex & 1) {
539 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
540 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
541 } else {
542 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
543 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
544 }
545 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
546 if (video->ocpIncrement) {
547 ++video->ocpIndex;
548 video->ocpIndex &= 0x3F;
549 video->p->memory.io[REG_OCPS] &= 0x80;
550 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
551 }
552 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
553 break;
554 }
555 }
556}
557
558void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
559 value &= 1;
560 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
561 video->vramCurrentBank = value;
562}
563
564void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
565 if (index >= 12) {
566 return;
567 }
568 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
569}
570
571void GBVideoDisableCGB(struct GBVideo* video) {
572 video->dmgPalette[0] = video->palette[0];
573 video->dmgPalette[1] = video->palette[1];
574 video->dmgPalette[2] = video->palette[2];
575 video->dmgPalette[3] = video->palette[3];
576 video->dmgPalette[4] = video->palette[8 * 4 + 0];
577 video->dmgPalette[5] = video->palette[8 * 4 + 1];
578 video->dmgPalette[6] = video->palette[8 * 4 + 2];
579 video->dmgPalette[7] = video->palette[8 * 4 + 3];
580 video->dmgPalette[8] = video->palette[9 * 4 + 0];
581 video->dmgPalette[9] = video->palette[9 * 4 + 1];
582 video->dmgPalette[10] = video->palette[9 * 4 + 2];
583 video->dmgPalette[11] = video->palette[9 * 4 + 3];
584 video->renderer->deinit(video->renderer);
585 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
586}
587
588void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
589 int i;
590 if (!(video->sgbCommandHeader & 7)) {
591 video->sgbBufferIndex = 0;
592 if ((data[0] >> 3) > SGB_OBJ_TRN) {
593 video->sgbCommandHeader = 0;
594 return;
595 }
596 video->sgbCommandHeader = data[0];
597 }
598 --video->sgbCommandHeader;
599 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
600 ++video->sgbBufferIndex;
601 if (video->sgbCommandHeader & 7) {
602 return;
603 }
604 switch (video->sgbCommandHeader >> 3) {
605 case SGB_PAL01:
606 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
607 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
608 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
609 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
610
611 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
612 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
613 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
614 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
615
616 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
617 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
618
619 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
620 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
621 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
622 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
623 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
624 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
625 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
626 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
627 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
628 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
629 break;
630 case SGB_PAL23:
631 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
632 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
633 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
634
635 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
636 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
637 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
638 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
639 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
640 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
641 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
642 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
643 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
644 break;
645 case SGB_PAL03:
646 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
647 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
648 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
649 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
650
651 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
652 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
653
654 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
655 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
656 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
657 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
658 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
659 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
660 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
661 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
662 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
663 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
664 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
665 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
666 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
667 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
668 break;
669 case SGB_PAL12:
670 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
671 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
672 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
673
674 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
675 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
676 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
677 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
678 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
679 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
680 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
681 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
682 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
683 break;
684 case SGB_PAL_SET:
685 for (i = 0; i < 4; ++i) {
686 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
687 if (entry >= 0x200) {
688 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
689 continue;
690 }
691 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
692 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
693 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
694 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
695 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
696 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
697 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
698 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
699 }
700 break;
701 case SGB_ATTR_BLK:
702 case SGB_ATTR_DIV:
703 case SGB_ATTR_CHR:
704 case SGB_ATTR_LIN:
705 case SGB_PAL_TRN:
706 case SGB_ATRC_EN:
707 case SGB_CHR_TRN:
708 case SGB_PCT_TRN:
709 case SGB_ATTR_TRN:
710 case SGB_ATTR_SET:
711 break;
712 case SGB_MLT_REQ:
713 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
714 video->p->sgbCurrentController = 0;
715 return;
716 case SGB_MASK_EN:
717 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
718 break;
719 default:
720 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
721 return;
722 }
723 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
724}
725
726static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
727 UNUSED(renderer);
728 UNUSED(model);
729 UNUSED(borders);
730 // Nothing to do
731}
732
733static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
734 UNUSED(renderer);
735 // Nothing to do
736}
737
738static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
739 if (renderer->cache) {
740 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
741 }
742 return value;
743}
744
745static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
746 UNUSED(renderer);
747 UNUSED(data);
748}
749
750static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
751 if (renderer->cache) {
752 mCacheSetWriteVRAM(renderer->cache, address);
753 }
754}
755
756static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
757 UNUSED(renderer);
758 UNUSED(oam);
759 // Nothing to do
760}
761
762static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
763 if (renderer->cache) {
764 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
765 }
766}
767
768static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
769 UNUSED(renderer);
770 UNUSED(endX);
771 UNUSED(startX);
772 UNUSED(y);
773 UNUSED(obj);
774 UNUSED(oamMax);
775 // Nothing to do
776}
777
778static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
779 UNUSED(renderer);
780 UNUSED(y);
781 // Nothing to do
782}
783
784static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
785 UNUSED(renderer);
786 // Nothing to do
787}
788
789static void GBVideoDummyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
790 UNUSED(renderer);
791 UNUSED(enable);
792 // Nothing to do
793}
794
795static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
796 UNUSED(renderer);
797 UNUSED(stride);
798 UNUSED(pixels);
799 // Nothing to do
800}
801
802static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
803 UNUSED(renderer);
804 UNUSED(stride);
805 UNUSED(pixels);
806 // Nothing to do
807}
808
809void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
810 STORE_16LE(video->x, 0, &state->video.x);
811 STORE_16LE(video->ly, 0, &state->video.ly);
812 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
813 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
814 state->video.vramCurrentBank = video->vramCurrentBank;
815
816 GBSerializedVideoFlags flags = 0;
817 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
818 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
819 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
820 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
821 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
822 state->video.flags = flags;
823 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
824 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
825
826 size_t i;
827 for (i = 0; i < 64; ++i) {
828 STORE_16LE(video->palette[i], i * 2, state->video.palette);
829 }
830
831 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
832 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
833
834 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
835 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
836}
837
838void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
839 LOAD_16LE(video->x, 0, &state->video.x);
840 LOAD_16LE(video->ly, 0, &state->video.ly);
841 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
842 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
843 video->vramCurrentBank = state->video.vramCurrentBank;
844
845 GBSerializedVideoFlags flags = state->video.flags;
846 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
847 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
848 video->mode = GBSerializedVideoFlagsGetMode(flags);
849 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
850 video->bcpIndex &= 0x3F;
851 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
852 video->ocpIndex &= 0x3F;
853
854 switch (video->mode) {
855 case 0:
856 video->modeEvent.callback = _endMode0;
857 break;
858 case 1:
859 video->modeEvent.callback = _endMode1;
860 break;
861 case 2:
862 video->modeEvent.callback = _endMode2;
863 break;
864 case 3:
865 video->modeEvent.callback = _endMode3;
866 break;
867 }
868
869 uint32_t when;
870 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
871 LOAD_32LE(when, 0, &state->video.nextMode);
872 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
873 }
874 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
875 LOAD_32LE(when, 0, &state->video.nextFrame);
876 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
877 }
878
879 size_t i;
880 for (i = 0; i < 64; ++i) {
881 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
882 video->renderer->writePalette(video->renderer, i, video->palette[i]);
883 }
884
885 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
886 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
887
888 _cleanOAM(video, video->ly);
889 GBVideoSwitchBank(video, video->vramCurrentBank);
890
891 video->renderer->deinit(video->renderer);
892 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
893}