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 = 0;
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
76 video->sgbBorders = true;
77
78 video->renderer->sgbCharRam = NULL;
79 video->renderer->sgbMapRam = NULL;
80 video->renderer->sgbPalRam = NULL;
81 video->renderer->sgbAttributes = NULL;
82 video->renderer->sgbAttributeFiles = NULL;
83}
84
85void GBVideoReset(struct GBVideo* video) {
86 video->ly = 0;
87 video->x = 0;
88 video->mode = 1;
89 video->stat = 1;
90
91 video->frameCounter = 0;
92 video->frameskipCounter = 0;
93
94 if (video->vram) {
95 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
96 }
97 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
98 GBVideoSwitchBank(video, 0);
99 video->renderer->vram = video->vram;
100 memset(&video->oam, 0, sizeof(video->oam));
101 video->renderer->oam = &video->oam;
102 memset(&video->palette, 0, sizeof(video->palette));
103
104 if (video->p->model == GB_MODEL_SGB) {
105 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
106 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
107 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
108 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
109 video->renderer->sgbAttributes = malloc(90 * 45);
110 memset(video->renderer->sgbAttributes, 0, 90 * 45);
111 video->sgbCommandHeader = 0;
112 }
113
114 video->palette[0] = video->dmgPalette[0];
115 video->palette[1] = video->dmgPalette[1];
116 video->palette[2] = video->dmgPalette[2];
117 video->palette[3] = video->dmgPalette[3];
118 video->palette[8 * 4 + 0] = video->dmgPalette[0];
119 video->palette[8 * 4 + 1] = video->dmgPalette[1];
120 video->palette[8 * 4 + 2] = video->dmgPalette[2];
121 video->palette[8 * 4 + 3] = video->dmgPalette[3];
122 video->palette[9 * 4 + 0] = video->dmgPalette[0];
123 video->palette[9 * 4 + 1] = video->dmgPalette[1];
124 video->palette[9 * 4 + 2] = video->dmgPalette[2];
125 video->palette[9 * 4 + 3] = video->dmgPalette[3];
126
127 video->renderer->deinit(video->renderer);
128 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
129
130 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
131 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
132 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
133 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
134 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
135 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
136 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
137 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
138 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
139 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
140 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
141 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
142}
143
144void GBVideoDeinit(struct GBVideo* video) {
145 GBVideoAssociateRenderer(video, &dummyRenderer);
146 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
147 if (video->renderer->sgbCharRam) {
148 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
149 video->renderer->sgbCharRam = NULL;
150 }
151 if (video->renderer->sgbMapRam) {
152 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
153 video->renderer->sgbMapRam = NULL;
154 }
155 if (video->renderer->sgbPalRam) {
156 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
157 video->renderer->sgbPalRam = NULL;
158 }
159 if (video->renderer->sgbAttributeFiles) {
160 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
161 video->renderer->sgbAttributeFiles = NULL;
162 }
163 if (video->renderer->sgbAttributes) {
164 free(video->renderer->sgbAttributes);
165 video->renderer->sgbAttributes = NULL;
166 }
167}
168
169void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
170 video->renderer->deinit(video->renderer);
171 renderer->cache = video->renderer->cache;
172 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
173 renderer->sgbCharRam = video->renderer->sgbCharRam;
174 renderer->sgbMapRam = video->renderer->sgbMapRam;
175 renderer->sgbPalRam = video->renderer->sgbPalRam;
176 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
177 renderer->sgbAttributes = video->renderer->sgbAttributes;
178 video->renderer = renderer;
179 renderer->vram = video->vram;
180 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
181}
182
183static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
184 // TODO: variable for the IRQ line value?
185 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
186 return true;
187 }
188 switch (GBRegisterSTATGetMode(stat)) {
189 case 0:
190 if (GBRegisterSTATIsHblankIRQ(stat)) {
191 return true;
192 }
193 break;
194 case 1:
195 if (GBRegisterSTATIsVblankIRQ(stat)) {
196 return true;
197 }
198 break;
199 case 2:
200 if (GBRegisterSTATIsOAMIRQ(stat)) {
201 return true;
202 }
203 break;
204 case 3:
205 break;
206 }
207 return false;
208}
209
210void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
211 struct GBVideo* video = context;
212 if (video->frameskipCounter <= 0) {
213 video->renderer->finishScanline(video->renderer, video->ly);
214 }
215 int lyc = video->p->memory.io[REG_LYC];
216 int32_t next;
217 ++video->ly;
218 video->p->memory.io[REG_LY] = video->ly;
219 GBRegisterSTAT oldStat = video->stat;
220 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
221 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
222 // TODO: Cache SCX & 7 in case it changes during mode 2
223 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
224 video->mode = 2;
225 video->modeEvent.callback = _endMode2;
226 } else {
227 next = GB_VIDEO_HORIZONTAL_LENGTH;
228 video->mode = 1;
229 video->modeEvent.callback = _endMode1;
230
231 mTimingDeschedule(&video->p->timing, &video->frameEvent);
232 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
233
234 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
235 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
236 }
237 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
238 }
239 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
240 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
241 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
242 }
243 GBUpdateIRQs(video->p);
244 video->p->memory.io[REG_STAT] = video->stat;
245 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
246}
247
248void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
249 struct GBVideo* video = context;
250 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
251 return;
252 }
253 int lyc = video->p->memory.io[REG_LYC];
254 // TODO: One M-cycle delay
255 ++video->ly;
256 int32_t next;
257 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
258 video->ly = 0;
259 video->p->memory.io[REG_LY] = video->ly;
260 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
261 video->mode = 2;
262 video->modeEvent.callback = _endMode2;
263 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
264 video->p->memory.io[REG_LY] = 0;
265 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
266 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
267 video->p->memory.io[REG_LY] = video->ly;
268 next = 8;
269 } else {
270 video->p->memory.io[REG_LY] = video->ly;
271 next = GB_VIDEO_HORIZONTAL_LENGTH;
272 }
273
274 GBRegisterSTAT oldStat = video->stat;
275 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
276 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
277 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
278 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
279 GBUpdateIRQs(video->p);
280 }
281 video->p->memory.io[REG_STAT] = video->stat;
282 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
283}
284
285void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
286 struct GBVideo* video = context;
287 _cleanOAM(video, video->ly);
288 video->x = 0;
289 video->dotClock = mTimingCurrentTime(timing) - cyclesLate;
290 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
291 video->mode = 3;
292 video->modeEvent.callback = _endMode3;
293 GBRegisterSTAT oldStat = video->stat;
294 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
295 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
296 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
297 GBUpdateIRQs(video->p);
298 }
299 video->p->memory.io[REG_STAT] = video->stat;
300 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
301}
302
303void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
304 struct GBVideo* video = context;
305 GBVideoProcessDots(video);
306 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
307 video->p->memory.hdmaRemaining = 0x10;
308 video->p->cpuBlocked = true;
309 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
310 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
311 }
312 video->mode = 0;
313 video->modeEvent.callback = _endMode0;
314 GBRegisterSTAT oldStat = video->stat;
315 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
316 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
317 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
318 GBUpdateIRQs(video->p);
319 }
320 video->p->memory.io[REG_STAT] = video->stat;
321 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6;
322 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
323}
324
325void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
326 UNUSED(cyclesLate);
327 struct GBVideo* video = context;
328 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
329 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
330 return;
331 }
332
333 size_t c;
334 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
335 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
336 if (callbacks->videoFrameEnded) {
337 callbacks->videoFrameEnded(callbacks->context);
338 }
339 }
340
341 GBFrameEnded(video->p);
342 mCoreSyncPostFrame(video->p->sync);
343 --video->frameskipCounter;
344 if (video->frameskipCounter < 0) {
345 video->renderer->finishFrame(video->renderer);
346 video->frameskipCounter = video->frameskip;
347 }
348 ++video->frameCounter;
349
350 // TODO: Move to common code
351 if (video->p->stream && video->p->stream->postVideoFrame) {
352 const color_t* pixels;
353 size_t stride;
354 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
355 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
356 }
357
358 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
359 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
360 }
361
362 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
363 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
364 if (callbacks->videoFrameStarted) {
365 callbacks->videoFrameStarted(callbacks->context);
366 }
367 }
368}
369
370static void _cleanOAM(struct GBVideo* video, int y) {
371 // TODO: GBC differences
372 // TODO: Optimize
373 video->objMax = 0;
374 int spriteHeight = 8;
375 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
376 spriteHeight = 16;
377 }
378 int o = 0;
379 int i;
380 for (i = 0; i < 40; ++i) {
381 uint8_t oy = video->oam.obj[i].y;
382 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
383 continue;
384 }
385 // TODO: Sort
386 video->objThisLine[o] = video->oam.obj[i];
387 ++o;
388 if (o == 10) {
389 break;
390 }
391 }
392 video->objMax = o;
393}
394
395void GBVideoProcessDots(struct GBVideo* video) {
396 if (video->mode != 3) {
397 return;
398 }
399 int oldX = video->x;
400 video->x = (video->p->timing.masterCycles - video->dotClock + video->p->cpu->cycles) >> video->p->doubleSpeed;
401 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
402 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
403 } else if (video->x < 0) {
404 mLOG(GB, FATAL, "Video dot clock went negative!");
405 video->x = oldX;
406 }
407 if (video->frameskipCounter <= 0) {
408 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
409 }
410}
411
412void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
413 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
414 video->mode = 2;
415 video->modeEvent.callback = _endMode2;
416 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
417 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
418
419 video->ly = 0;
420 video->p->memory.io[REG_LY] = 0;
421 // TODO: Does this read as 0 for 4 T-cycles?
422 GBRegisterSTAT oldStat = video->stat;
423 video->stat = GBRegisterSTATSetMode(video->stat, 2);
424 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
425 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
426 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
427 GBUpdateIRQs(video->p);
428 }
429 video->p->memory.io[REG_STAT] = video->stat;
430 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
431
432 mTimingDeschedule(&video->p->timing, &video->frameEvent);
433 }
434 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
435 // TODO: Fix serialization; this gets internal and visible modes out of sync
436 video->stat = GBRegisterSTATSetMode(video->stat, 0);
437 video->p->memory.io[REG_STAT] = video->stat;
438 video->ly = 0;
439 video->p->memory.io[REG_LY] = 0;
440 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
441
442 mTimingDeschedule(&video->p->timing, &video->modeEvent);
443 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
444 }
445 video->p->memory.io[REG_STAT] = video->stat;
446}
447
448void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
449 GBRegisterSTAT oldStat = video->stat;
450 video->stat = (video->stat & 0x7) | (value & 0x78);
451 if (video->p->model < GB_MODEL_CGB && !_statIRQAsserted(video, oldStat) && video->mode < 3) {
452 // TODO: variable for the IRQ line value?
453 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
454 GBUpdateIRQs(video->p);
455 }
456}
457
458void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
459 GBRegisterSTAT oldStat = video->stat;
460 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
461 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
462 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
463 GBUpdateIRQs(video->p);
464 }
465 video->p->memory.io[REG_STAT] = video->stat;
466}
467
468void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
469 if (video->p->model < GB_MODEL_SGB) {
470 switch (address) {
471 case REG_BGP:
472 video->palette[0] = video->dmgPalette[value & 3];
473 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
474 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
475 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
476 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
477 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
478 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
479 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
480 break;
481 case REG_OBP0:
482 video->palette[8 * 4 + 0] = video->dmgPalette[value & 3];
483 video->palette[8 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
484 video->palette[8 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
485 video->palette[8 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
486 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
487 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
488 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
489 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
490 break;
491 case REG_OBP1:
492 video->palette[9 * 4 + 0] = video->dmgPalette[value & 3];
493 video->palette[9 * 4 + 1] = video->dmgPalette[(value >> 2) & 3];
494 video->palette[9 * 4 + 2] = video->dmgPalette[(value >> 4) & 3];
495 video->palette[9 * 4 + 3] = video->dmgPalette[(value >> 6) & 3];
496 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
497 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
498 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
499 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
500 break;
501 }
502 } else if (video->p->model == GB_MODEL_SGB) {
503 video->renderer->writeVideoRegister(video->renderer, address, value);
504 } else {
505 switch (address) {
506 case REG_BCPD:
507 if (video->bcpIndex & 1) {
508 video->palette[video->bcpIndex >> 1] &= 0x00FF;
509 video->palette[video->bcpIndex >> 1] |= value << 8;
510 } else {
511 video->palette[video->bcpIndex >> 1] &= 0xFF00;
512 video->palette[video->bcpIndex >> 1] |= value;
513 }
514 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
515 if (video->bcpIncrement) {
516 ++video->bcpIndex;
517 video->bcpIndex &= 0x3F;
518 video->p->memory.io[REG_BCPS] &= 0x80;
519 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
520 }
521 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
522 break;
523 case REG_OCPD:
524 if (video->ocpIndex & 1) {
525 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
526 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
527 } else {
528 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
529 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
530 }
531 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
532 if (video->ocpIncrement) {
533 ++video->ocpIndex;
534 video->ocpIndex &= 0x3F;
535 video->p->memory.io[REG_OCPS] &= 0x80;
536 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
537 }
538 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
539 break;
540 }
541 }
542}
543
544void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
545 value &= 1;
546 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
547 video->vramCurrentBank = value;
548}
549
550void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
551 if (index >= 4) {
552 return;
553 }
554 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
555}
556
557void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
558 int i;
559 if (!(video->sgbCommandHeader & 7)) {
560 if ((data[0] >> 3) > SGB_OBJ_TRN) {
561 video->sgbCommandHeader = 0;
562 return;
563 }
564 video->sgbCommandHeader = data[0];
565 }
566 --video->sgbCommandHeader;
567 switch (video->sgbCommandHeader >> 3) {
568 case SGB_PAL01:
569 video->palette[0] = data[1] | (data[2] << 8);
570 video->palette[1] = data[3] | (data[4] << 8);
571 video->palette[2] = data[5] | (data[6] << 8);
572 video->palette[3] = data[7] | (data[8] << 8);
573
574 video->palette[16] = data[1] | (data[2] << 8);
575 video->palette[17] = data[9] | (data[10] << 8);
576 video->palette[18] = data[11] | (data[12] << 8);
577 video->palette[19] = data[13] | (data[14] << 8);
578
579 video->palette[32] = data[1] | (data[2] << 8);
580 video->palette[48] = data[1] | (data[2] << 8);
581
582 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
583 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
584 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
585 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
586 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
587 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
588 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
589 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
590 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
591 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
592 break;
593 case SGB_PAL23:
594 video->palette[33] = data[3] | (data[4] << 8);
595 video->palette[34] = data[5] | (data[6] << 8);
596 video->palette[35] = data[7] | (data[8] << 8);
597
598 video->palette[49] = data[9] | (data[10] << 8);
599 video->palette[50] = data[11] | (data[12] << 8);
600 video->palette[51] = data[13] | (data[14] << 8);
601 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
602 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
603 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
604 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
605 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
606 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
607 break;
608 case SGB_PAL03:
609 video->palette[0] = data[1] | (data[2] << 8);
610 video->palette[1] = data[3] | (data[4] << 8);
611 video->palette[2] = data[5] | (data[6] << 8);
612 video->palette[3] = data[7] | (data[8] << 8);
613
614 video->palette[16] = data[1] | (data[2] << 8);
615 video->palette[32] = data[1] | (data[2] << 8);
616
617 video->palette[48] = data[1] | (data[2] << 8);
618 video->palette[49] = data[9] | (data[10] << 8);
619 video->palette[50] = data[11] | (data[12] << 8);
620 video->palette[51] = data[13] | (data[14] << 8);
621 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
622 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
623 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
624 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
625 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
626 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
627 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
628 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
629 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
630 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
631 break;
632 case SGB_PAL12:
633 video->palette[17] = data[3] | (data[4] << 8);
634 video->palette[18] = data[5] | (data[6] << 8);
635 video->palette[19] = data[7] | (data[8] << 8);
636
637 video->palette[33] = data[9] | (data[10] << 8);
638 video->palette[34] = data[11] | (data[12] << 8);
639 video->palette[35] = data[13] | (data[14] << 8);
640 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
641 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
642 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
643 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
644 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
645 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
646 break;
647 case SGB_PAL_SET:
648 for (i = 0; i < 4; ++i) {
649 uint16_t entry = (data[2 + (i * 2)] << 8) | data[1 + (i * 2)];
650 if (entry >= 0x200) {
651 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
652 continue;
653 }
654 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
655 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[0]);
656 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
657 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
658 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
659 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
660 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
661 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
662 }
663 break;
664 case SGB_ATTR_BLK:
665 case SGB_PAL_TRN:
666 case SGB_ATRC_EN:
667 case SGB_CHR_TRN:
668 case SGB_PCT_TRN:
669 case SGB_ATTR_TRN:
670 case SGB_ATTR_SET:
671 break;
672 case SGB_MLT_REG:
673 return;
674 case SGB_MASK_EN:
675 video->renderer->sgbRenderMode = data[1] & 0x3;
676 break;
677 default:
678 mLOG(GB, STUB, "Unimplemented SGB command: %02X", data[0] >> 3);
679 return;
680 }
681 video->renderer->writeSGBPacket(video->renderer, data);
682}
683
684static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
685 UNUSED(renderer);
686 UNUSED(model);
687 UNUSED(borders);
688 // Nothing to do
689}
690
691static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
692 UNUSED(renderer);
693 // Nothing to do
694}
695
696static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
697 if (renderer->cache) {
698 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
699 }
700 return value;
701}
702
703static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
704 UNUSED(renderer);
705 UNUSED(data);
706}
707
708static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
709 if (renderer->cache) {
710 mCacheSetWriteVRAM(renderer->cache, address);
711 }
712}
713
714static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
715 UNUSED(renderer);
716 UNUSED(oam);
717 // Nothing to do
718}
719
720static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
721 if (renderer->cache) {
722 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
723 }
724}
725
726static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
727 UNUSED(renderer);
728 UNUSED(endX);
729 UNUSED(startX);
730 UNUSED(y);
731 UNUSED(obj);
732 UNUSED(oamMax);
733 // Nothing to do
734}
735
736static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
737 UNUSED(renderer);
738 UNUSED(y);
739 // Nothing to do
740}
741
742static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
743 UNUSED(renderer);
744 // Nothing to do
745}
746
747static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
748 UNUSED(renderer);
749 UNUSED(stride);
750 UNUSED(pixels);
751 // Nothing to do
752}
753
754static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
755 UNUSED(renderer);
756 UNUSED(stride);
757 UNUSED(pixels);
758 // Nothing to do
759}
760
761void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
762 STORE_16LE(video->x, 0, &state->video.x);
763 STORE_16LE(video->ly, 0, &state->video.ly);
764 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
765 state->video.vramCurrentBank = video->vramCurrentBank;
766
767 GBSerializedVideoFlags flags = 0;
768 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
769 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
770 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
771 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
772 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
773 state->video.flags = flags;
774 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
775 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
776
777 size_t i;
778 for (i = 0; i < 64; ++i) {
779 STORE_16LE(video->palette[i], i * 2, state->video.palette);
780 }
781
782 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
783 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
784
785 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
786 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
787}
788
789void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
790 LOAD_16LE(video->x, 0, &state->video.x);
791 LOAD_16LE(video->ly, 0, &state->video.ly);
792 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
793 video->vramCurrentBank = state->video.vramCurrentBank;
794
795 GBSerializedVideoFlags flags = state->video.flags;
796 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
797 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
798 video->mode = GBSerializedVideoFlagsGetMode(flags);
799 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
800 video->bcpIndex &= 0x3F;
801 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
802 video->ocpIndex &= 0x3F;
803
804 switch (video->mode) {
805 case 0:
806 video->modeEvent.callback = _endMode0;
807 break;
808 case 1:
809 video->modeEvent.callback = _endMode1;
810 break;
811 case 2:
812 video->modeEvent.callback = _endMode2;
813 break;
814 case 3:
815 video->modeEvent.callback = _endMode3;
816 break;
817 }
818
819 uint32_t when;
820 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
821 LOAD_32LE(when, 0, &state->video.nextMode);
822 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
823 }
824 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
825 LOAD_32LE(when, 0, &state->video.nextFrame);
826 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
827 }
828
829 size_t i;
830 for (i = 0; i < 64; ++i) {
831 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
832 video->renderer->writePalette(video->renderer, i, video->palette[i]);
833 }
834
835 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
836 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
837
838 _cleanOAM(video, video->ly);
839 GBVideoSwitchBank(video, video->vramCurrentBank);
840
841 video->renderer->deinit(video->renderer);
842 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
843}