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 GBVideoAssociateRenderer(video, &dummyRenderer);
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 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
423
424 video->ly = 0;
425 video->p->memory.io[REG_LY] = 0;
426 GBRegisterSTAT oldStat = video->stat;
427 video->stat = GBRegisterSTATSetMode(video->stat, 0);
428 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
429 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
430 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
431 GBUpdateIRQs(video->p);
432 }
433 video->p->memory.io[REG_STAT] = video->stat;
434 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
435
436 mTimingDeschedule(&video->p->timing, &video->frameEvent);
437 }
438 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
439 // TODO: Fix serialization; this gets internal and visible modes out of sync
440 video->stat = GBRegisterSTATSetMode(video->stat, 0);
441 video->p->memory.io[REG_STAT] = video->stat;
442 video->ly = 0;
443 video->p->memory.io[REG_LY] = 0;
444 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
445
446 mTimingDeschedule(&video->p->timing, &video->modeEvent);
447 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
448 }
449 video->p->memory.io[REG_STAT] = video->stat;
450}
451
452void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
453 GBRegisterSTAT oldStat = video->stat;
454 video->stat = (video->stat & 0x7) | (value & 0x78);
455 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
456 return;
457 }
458 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
459 // TODO: variable for the IRQ line value?
460 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
461 GBUpdateIRQs(video->p);
462 }
463}
464
465void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
466 GBRegisterSTAT oldStat = video->stat;
467 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
468 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
469 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
470 GBUpdateIRQs(video->p);
471 }
472 video->p->memory.io[REG_STAT] = video->stat;
473}
474
475void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
476 if (video->p->model < GB_MODEL_SGB) {
477 switch (address) {
478 case REG_BGP:
479 video->palette[0] = video->dmgPalette[value & 3];
480 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
481 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
482 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
483 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
484 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
485 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
486 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
487 break;
488 case REG_OBP0:
489 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
490 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
491 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
492 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
493 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
494 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
495 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
496 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
497 break;
498 case REG_OBP1:
499 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
500 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
501 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
502 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
503 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
504 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
505 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
506 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
507 break;
508 }
509 } else if (video->p->model == GB_MODEL_SGB) {
510 video->renderer->writeVideoRegister(video->renderer, address, value);
511 } else {
512 switch (address) {
513 case REG_BCPD:
514 if (video->bcpIndex & 1) {
515 video->palette[video->bcpIndex >> 1] &= 0x00FF;
516 video->palette[video->bcpIndex >> 1] |= value << 8;
517 } else {
518 video->palette[video->bcpIndex >> 1] &= 0xFF00;
519 video->palette[video->bcpIndex >> 1] |= value;
520 }
521 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
522 if (video->bcpIncrement) {
523 ++video->bcpIndex;
524 video->bcpIndex &= 0x3F;
525 video->p->memory.io[REG_BCPS] &= 0x80;
526 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
527 }
528 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
529 break;
530 case REG_OCPD:
531 if (video->ocpIndex & 1) {
532 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
533 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
534 } else {
535 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
536 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
537 }
538 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
539 if (video->ocpIncrement) {
540 ++video->ocpIndex;
541 video->ocpIndex &= 0x3F;
542 video->p->memory.io[REG_OCPS] &= 0x80;
543 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
544 }
545 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
546 break;
547 }
548 }
549}
550
551void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
552 value &= 1;
553 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
554 video->vramCurrentBank = value;
555}
556
557void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
558 if (index >= 12) {
559 return;
560 }
561 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
562}
563
564void GBVideoDisableCGB(struct GBVideo* video) {
565 video->dmgPalette[0] = video->palette[0];
566 video->dmgPalette[1] = video->palette[1];
567 video->dmgPalette[2] = video->palette[2];
568 video->dmgPalette[3] = video->palette[3];
569 video->dmgPalette[4] = video->palette[8 * 4 + 0];
570 video->dmgPalette[5] = video->palette[8 * 4 + 1];
571 video->dmgPalette[6] = video->palette[8 * 4 + 2];
572 video->dmgPalette[7] = video->palette[8 * 4 + 3];
573 video->dmgPalette[8] = video->palette[9 * 4 + 0];
574 video->dmgPalette[9] = video->palette[9 * 4 + 1];
575 video->dmgPalette[10] = video->palette[9 * 4 + 2];
576 video->dmgPalette[11] = video->palette[9 * 4 + 3];
577 video->renderer->deinit(video->renderer);
578 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
579}
580
581void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
582 int i;
583 if (!(video->sgbCommandHeader & 7)) {
584 video->sgbBufferIndex = 0;
585 if ((data[0] >> 3) > SGB_OBJ_TRN) {
586 video->sgbCommandHeader = 0;
587 return;
588 }
589 video->sgbCommandHeader = data[0];
590 }
591 --video->sgbCommandHeader;
592 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
593 ++video->sgbBufferIndex;
594 if (video->sgbCommandHeader & 7) {
595 return;
596 }
597 switch (video->sgbCommandHeader >> 3) {
598 case SGB_PAL01:
599 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
600 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
601 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
602 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
603
604 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
605 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
606 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
607 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
608
609 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
610 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
611
612 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
613 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
614 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
615 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
616 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
617 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
618 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
619 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
620 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
621 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
622 break;
623 case SGB_PAL23:
624 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
625 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
626 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
627
628 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
629 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
630 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
631 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
632 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
633 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
634 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
635 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
636 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
637 break;
638 case SGB_PAL03:
639 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
640 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
641 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
642 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
643
644 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
645 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
646
647 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
648 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
649 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
650 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
651 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
652 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
653 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
654 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
655 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
656 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
657 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
658 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
659 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
660 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
661 break;
662 case SGB_PAL12:
663 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
664 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
665 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
666
667 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
668 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
669 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
670 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
671 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
672 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
673 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
674 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
675 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
676 break;
677 case SGB_PAL_SET:
678 for (i = 0; i < 4; ++i) {
679 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
680 if (entry >= 0x200) {
681 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
682 continue;
683 }
684 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
685 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
686 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
687 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
688 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
689 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
690 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
691 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
692 }
693 break;
694 case SGB_ATTR_BLK:
695 case SGB_ATTR_DIV:
696 case SGB_ATTR_CHR:
697 case SGB_ATTR_LIN:
698 case SGB_PAL_TRN:
699 case SGB_ATRC_EN:
700 case SGB_CHR_TRN:
701 case SGB_PCT_TRN:
702 case SGB_ATTR_TRN:
703 case SGB_ATTR_SET:
704 break;
705 case SGB_MLT_REQ:
706 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
707 video->p->sgbCurrentController = 0;
708 return;
709 case SGB_MASK_EN:
710 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
711 break;
712 default:
713 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
714 return;
715 }
716 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
717}
718
719static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
720 UNUSED(renderer);
721 UNUSED(model);
722 UNUSED(borders);
723 // Nothing to do
724}
725
726static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
727 UNUSED(renderer);
728 // Nothing to do
729}
730
731static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
732 if (renderer->cache) {
733 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
734 }
735 return value;
736}
737
738static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
739 UNUSED(renderer);
740 UNUSED(data);
741}
742
743static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
744 if (renderer->cache) {
745 mCacheSetWriteVRAM(renderer->cache, address);
746 }
747}
748
749static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
750 UNUSED(renderer);
751 UNUSED(oam);
752 // Nothing to do
753}
754
755static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
756 if (renderer->cache) {
757 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
758 }
759}
760
761static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
762 UNUSED(renderer);
763 UNUSED(endX);
764 UNUSED(startX);
765 UNUSED(y);
766 UNUSED(obj);
767 UNUSED(oamMax);
768 // Nothing to do
769}
770
771static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
772 UNUSED(renderer);
773 UNUSED(y);
774 // Nothing to do
775}
776
777static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
778 UNUSED(renderer);
779 // Nothing to do
780}
781
782static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
783 UNUSED(renderer);
784 UNUSED(stride);
785 UNUSED(pixels);
786 // Nothing to do
787}
788
789static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
790 UNUSED(renderer);
791 UNUSED(stride);
792 UNUSED(pixels);
793 // Nothing to do
794}
795
796void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
797 STORE_16LE(video->x, 0, &state->video.x);
798 STORE_16LE(video->ly, 0, &state->video.ly);
799 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
800 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
801 state->video.vramCurrentBank = video->vramCurrentBank;
802
803 GBSerializedVideoFlags flags = 0;
804 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
805 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
806 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
807 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
808 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
809 state->video.flags = flags;
810 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
811 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
812
813 size_t i;
814 for (i = 0; i < 64; ++i) {
815 STORE_16LE(video->palette[i], i * 2, state->video.palette);
816 }
817
818 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
819 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
820
821 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
822 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
823}
824
825void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
826 LOAD_16LE(video->x, 0, &state->video.x);
827 LOAD_16LE(video->ly, 0, &state->video.ly);
828 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
829 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
830 video->vramCurrentBank = state->video.vramCurrentBank;
831
832 GBSerializedVideoFlags flags = state->video.flags;
833 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
834 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
835 video->mode = GBSerializedVideoFlagsGetMode(flags);
836 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
837 video->bcpIndex &= 0x3F;
838 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
839 video->ocpIndex &= 0x3F;
840
841 switch (video->mode) {
842 case 0:
843 video->modeEvent.callback = _endMode0;
844 break;
845 case 1:
846 video->modeEvent.callback = _endMode1;
847 break;
848 case 2:
849 video->modeEvent.callback = _endMode2;
850 break;
851 case 3:
852 video->modeEvent.callback = _endMode3;
853 break;
854 }
855
856 uint32_t when;
857 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
858 LOAD_32LE(when, 0, &state->video.nextMode);
859 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
860 }
861 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
862 LOAD_32LE(when, 0, &state->video.nextFrame);
863 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
864 }
865
866 size_t i;
867 for (i = 0; i < 64; ++i) {
868 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
869 video->renderer->writePalette(video->renderer, i, video->palette[i]);
870 }
871
872 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
873 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
874
875 _cleanOAM(video, video->ly);
876 GBVideoSwitchBank(video, video->vramCurrentBank);
877
878 video->renderer->deinit(video->renderer);
879 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
880}