src/gb/video.c (view raw)
1/* Copyright (c) 2013-2016 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include <mgba/internal/gb/video.h>
7
8#include <mgba/core/sync.h>
9#include <mgba/core/thread.h>
10#include <mgba/core/cache-set.h>
11#include <mgba/internal/gb/gb.h>
12#include <mgba/internal/gb/io.h>
13#include <mgba/internal/gb/renderers/cache-set.h>
14#include <mgba/internal/gb/serialize.h>
15#include <mgba/internal/lr35902/lr35902.h>
16
17#include <mgba-util/memory.h>
18
19static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
20static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer);
21static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
22static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
23static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
24static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
25static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
26static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
27static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
28static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer);
29static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
30static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
31
32static void _cleanOAM(struct GBVideo* video, int y);
33
34static void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate);
35static void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate);
36static void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate);
37static void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate);
38static void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate);
39
40static struct GBVideoRenderer dummyRenderer = {
41 .init = GBVideoDummyRendererInit,
42 .deinit = GBVideoDummyRendererDeinit,
43 .writeVideoRegister = GBVideoDummyRendererWriteVideoRegister,
44 .writeSGBPacket = GBVideoDummyRendererWriteSGBPacket,
45 .writeVRAM = GBVideoDummyRendererWriteVRAM,
46 .writeOAM = GBVideoDummyRendererWriteOAM,
47 .writePalette = GBVideoDummyRendererWritePalette,
48 .drawRange = GBVideoDummyRendererDrawRange,
49 .finishScanline = GBVideoDummyRendererFinishScanline,
50 .finishFrame = GBVideoDummyRendererFinishFrame,
51 .getPixels = GBVideoDummyRendererGetPixels,
52 .putPixels = GBVideoDummyRendererPutPixels,
53};
54
55void GBVideoInit(struct GBVideo* video) {
56 video->renderer = &dummyRenderer;
57 video->renderer->cache = NULL;
58 video->renderer->sgbRenderMode = 0;
59 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
60 video->frameskip = 0;
61
62 video->modeEvent.context = video;
63 video->modeEvent.name = "GB Video Mode";
64 video->modeEvent.callback = NULL;
65 video->modeEvent.priority = 8;
66 video->frameEvent.context = video;
67 video->frameEvent.name = "GB Video Frame";
68 video->frameEvent.callback = _updateFrameCount;
69 video->frameEvent.priority = 9;
70
71 video->dmgPalette[0] = 0x7FFF;
72 video->dmgPalette[1] = 0x56B5;
73 video->dmgPalette[2] = 0x294A;
74 video->dmgPalette[3] = 0x0000;
75 video->dmgPalette[4] = 0x7FFF;
76 video->dmgPalette[5] = 0x56B5;
77 video->dmgPalette[6] = 0x294A;
78 video->dmgPalette[7] = 0x0000;
79 video->dmgPalette[8] = 0x7FFF;
80 video->dmgPalette[9] = 0x56B5;
81 video->dmgPalette[10] = 0x294A;
82 video->dmgPalette[11] = 0x0000;
83
84 video->sgbBorders = true;
85
86 video->renderer->sgbCharRam = NULL;
87 video->renderer->sgbMapRam = NULL;
88 video->renderer->sgbPalRam = NULL;
89 video->renderer->sgbAttributes = NULL;
90 video->renderer->sgbAttributeFiles = NULL;
91}
92
93void GBVideoReset(struct GBVideo* video) {
94 video->ly = 0;
95 video->x = 0;
96 video->mode = 1;
97 video->stat = 1;
98
99 video->frameCounter = 0;
100 video->frameskipCounter = 0;
101
102 GBVideoSwitchBank(video, 0);
103 video->renderer->vram = video->vram;
104 memset(&video->oam, 0, sizeof(video->oam));
105 video->renderer->oam = &video->oam;
106 memset(&video->palette, 0, sizeof(video->palette));
107
108 if (video->p->model == GB_MODEL_SGB) {
109 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
110 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
111 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
112 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
113 video->renderer->sgbAttributes = malloc(90 * 45);
114 memset(video->renderer->sgbAttributes, 0, 90 * 45);
115 video->sgbCommandHeader = 0;
116 video->sgbBufferIndex = 0;
117 }
118
119 video->palette[0] = video->dmgPalette[0];
120 video->palette[1] = video->dmgPalette[1];
121 video->palette[2] = video->dmgPalette[2];
122 video->palette[3] = video->dmgPalette[3];
123 video->palette[8 * 4 + 0] = video->dmgPalette[4];
124 video->palette[8 * 4 + 1] = video->dmgPalette[5];
125 video->palette[8 * 4 + 2] = video->dmgPalette[6];
126 video->palette[8 * 4 + 3] = video->dmgPalette[7];
127 video->palette[9 * 4 + 0] = video->dmgPalette[8];
128 video->palette[9 * 4 + 1] = video->dmgPalette[9];
129 video->palette[9 * 4 + 2] = video->dmgPalette[10];
130 video->palette[9 * 4 + 3] = video->dmgPalette[11];
131
132 video->renderer->deinit(video->renderer);
133 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
134
135 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
136 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
137 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
138 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
139 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
140 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
141 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
142 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
143 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
144 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
145 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
146 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
147}
148
149void GBVideoDeinit(struct GBVideo* video) {
150 video->renderer->deinit(video->renderer);
151 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
152 if (video->renderer->sgbCharRam) {
153 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
154 video->renderer->sgbCharRam = NULL;
155 }
156 if (video->renderer->sgbMapRam) {
157 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
158 video->renderer->sgbMapRam = NULL;
159 }
160 if (video->renderer->sgbPalRam) {
161 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
162 video->renderer->sgbPalRam = NULL;
163 }
164 if (video->renderer->sgbAttributeFiles) {
165 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
166 video->renderer->sgbAttributeFiles = NULL;
167 }
168 if (video->renderer->sgbAttributes) {
169 free(video->renderer->sgbAttributes);
170 video->renderer->sgbAttributes = NULL;
171 }
172}
173
174void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
175 video->renderer->deinit(video->renderer);
176 renderer->cache = video->renderer->cache;
177 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
178 renderer->sgbCharRam = video->renderer->sgbCharRam;
179 renderer->sgbMapRam = video->renderer->sgbMapRam;
180 renderer->sgbPalRam = video->renderer->sgbPalRam;
181 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
182 renderer->sgbAttributes = video->renderer->sgbAttributes;
183 video->renderer = renderer;
184 renderer->vram = video->vram;
185 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
186}
187
188static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
189 // TODO: variable for the IRQ line value?
190 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
191 return true;
192 }
193 switch (GBRegisterSTATGetMode(stat)) {
194 case 0:
195 if (GBRegisterSTATIsHblankIRQ(stat)) {
196 return true;
197 }
198 break;
199 case 1:
200 if (GBRegisterSTATIsVblankIRQ(stat)) {
201 return true;
202 }
203 break;
204 case 2:
205 if (GBRegisterSTATIsOAMIRQ(stat)) {
206 return true;
207 }
208 break;
209 case 3:
210 break;
211 }
212 return false;
213}
214
215void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
216 struct GBVideo* video = context;
217 if (video->frameskipCounter <= 0) {
218 video->renderer->finishScanline(video->renderer, video->ly);
219 }
220 int lyc = video->p->memory.io[REG_LYC];
221 int32_t next;
222 ++video->ly;
223 video->p->memory.io[REG_LY] = video->ly;
224 GBRegisterSTAT oldStat = video->stat;
225 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
226 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
227 next = GB_VIDEO_MODE_2_LENGTH;
228 video->mode = 2;
229 video->modeEvent.callback = _endMode2;
230 } else {
231 next = GB_VIDEO_HORIZONTAL_LENGTH;
232 video->mode = 1;
233 video->modeEvent.callback = _endMode1;
234
235 mTimingDeschedule(&video->p->timing, &video->frameEvent);
236 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
237
238 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
239 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
240 }
241 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
242 }
243 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
244 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
245 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
246 }
247 GBUpdateIRQs(video->p);
248 video->p->memory.io[REG_STAT] = video->stat;
249 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
250}
251
252void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
253 struct GBVideo* video = context;
254 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
255 return;
256 }
257 int lyc = video->p->memory.io[REG_LYC];
258 // TODO: One M-cycle delay
259 ++video->ly;
260 int32_t next;
261 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
262 video->ly = 0;
263 video->p->memory.io[REG_LY] = video->ly;
264 next = GB_VIDEO_MODE_2_LENGTH;
265 video->mode = 2;
266 video->modeEvent.callback = _endMode2;
267 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
268 video->p->memory.io[REG_LY] = 0;
269 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
270 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
271 video->p->memory.io[REG_LY] = video->ly;
272 next = 8;
273 } else {
274 video->p->memory.io[REG_LY] = video->ly;
275 next = GB_VIDEO_HORIZONTAL_LENGTH;
276 }
277
278 GBRegisterSTAT oldStat = video->stat;
279 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
280 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
281 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
282 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
283 GBUpdateIRQs(video->p);
284 }
285 video->p->memory.io[REG_STAT] = video->stat;
286 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
287}
288
289void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
290 struct GBVideo* video = context;
291 _cleanOAM(video, video->ly);
292 video->x = -(video->p->memory.io[REG_SCX] & 7);
293 video->dotClock = mTimingCurrentTime(timing) - cyclesLate + 5 - (video->x << video->p->doubleSpeed);
294 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - video->x;
295 video->mode = 3;
296 video->modeEvent.callback = _endMode3;
297 GBRegisterSTAT oldStat = video->stat;
298 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
299 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
300 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
301 GBUpdateIRQs(video->p);
302 }
303 video->p->memory.io[REG_STAT] = video->stat;
304 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
305}
306
307void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
308 struct GBVideo* video = context;
309 GBVideoProcessDots(video, cyclesLate);
310 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
311 video->p->memory.hdmaRemaining = 0x10;
312 video->p->cpuBlocked = true;
313 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
314 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
315 }
316 video->mode = 0;
317 video->modeEvent.callback = _endMode0;
318 GBRegisterSTAT oldStat = video->stat;
319 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
320 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
321 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
322 GBUpdateIRQs(video->p);
323 }
324 video->p->memory.io[REG_STAT] = video->stat;
325 // TODO: Cache SCX & 7 in case it changes
326 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
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 = (int32_t) (mTimingCurrentTime(&video->p->timing) - cyclesLate - video->dotClock) >> 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 return;
410 }
411 if (oldX < 0) {
412 oldX = 0;
413 }
414 if (video->frameskipCounter <= 0) {
415 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
416 }
417}
418
419void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
420 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
421 video->mode = 2;
422 video->modeEvent.callback = _endMode2;
423 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
424 mTimingDeschedule(&video->p->timing, &video->modeEvent);
425 mTimingSchedule(&video->p->timing, &video->modeEvent, next << video->p->doubleSpeed);
426
427 video->ly = 0;
428 video->p->memory.io[REG_LY] = 0;
429 GBRegisterSTAT oldStat = video->stat;
430 video->stat = GBRegisterSTATSetMode(video->stat, 0);
431 video->stat = GBRegisterSTATSetLYC(video->stat, video->ly == video->p->memory.io[REG_LYC]);
432 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
433 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
434 GBUpdateIRQs(video->p);
435 }
436 video->p->memory.io[REG_STAT] = video->stat;
437 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
438
439 mTimingDeschedule(&video->p->timing, &video->frameEvent);
440 }
441 if (GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && !GBRegisterLCDCIsEnable(value)) {
442 // TODO: Fix serialization; this gets internal and visible modes out of sync
443 video->mode = 0;
444 video->stat = GBRegisterSTATSetMode(video->stat, 0);
445 video->p->memory.io[REG_STAT] = video->stat;
446 video->ly = 0;
447 video->p->memory.io[REG_LY] = 0;
448 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
449
450 mTimingDeschedule(&video->p->timing, &video->modeEvent);
451 mTimingDeschedule(&video->p->timing, &video->frameEvent);
452 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
453 }
454 video->p->memory.io[REG_STAT] = video->stat;
455}
456
457void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
458 GBRegisterSTAT oldStat = video->stat;
459 video->stat = (video->stat & 0x7) | (value & 0x78);
460 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
461 return;
462 }
463 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
464 // TODO: variable for the IRQ line value?
465 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
466 GBUpdateIRQs(video->p);
467 }
468}
469
470void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
471 GBRegisterSTAT oldStat = video->stat;
472 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
473 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
474 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
475 GBUpdateIRQs(video->p);
476 }
477 video->p->memory.io[REG_STAT] = video->stat;
478}
479
480void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
481 if (video->p->model < GB_MODEL_SGB) {
482 switch (address) {
483 case REG_BGP:
484 video->palette[0] = video->dmgPalette[value & 3];
485 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
486 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
487 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
488 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
489 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
490 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
491 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
492 break;
493 case REG_OBP0:
494 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
495 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
496 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
497 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
498 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
499 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
500 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
501 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
502 break;
503 case REG_OBP1:
504 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
505 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
506 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
507 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
508 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
509 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
510 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
511 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
512 break;
513 }
514 } else if (video->p->model == GB_MODEL_SGB) {
515 video->renderer->writeVideoRegister(video->renderer, address, value);
516 } else {
517 switch (address) {
518 case REG_BCPD:
519 if (video->bcpIndex & 1) {
520 video->palette[video->bcpIndex >> 1] &= 0x00FF;
521 video->palette[video->bcpIndex >> 1] |= value << 8;
522 } else {
523 video->palette[video->bcpIndex >> 1] &= 0xFF00;
524 video->palette[video->bcpIndex >> 1] |= value;
525 }
526 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
527 if (video->bcpIncrement) {
528 ++video->bcpIndex;
529 video->bcpIndex &= 0x3F;
530 video->p->memory.io[REG_BCPS] &= 0x80;
531 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
532 }
533 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
534 break;
535 case REG_OCPD:
536 if (video->ocpIndex & 1) {
537 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
538 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
539 } else {
540 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
541 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
542 }
543 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
544 if (video->ocpIncrement) {
545 ++video->ocpIndex;
546 video->ocpIndex &= 0x3F;
547 video->p->memory.io[REG_OCPS] &= 0x80;
548 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
549 }
550 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
551 break;
552 }
553 }
554}
555
556void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
557 value &= 1;
558 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
559 video->vramCurrentBank = value;
560}
561
562void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
563 if (index >= 12) {
564 return;
565 }
566 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
567}
568
569void GBVideoDisableCGB(struct GBVideo* video) {
570 video->dmgPalette[0] = video->palette[0];
571 video->dmgPalette[1] = video->palette[1];
572 video->dmgPalette[2] = video->palette[2];
573 video->dmgPalette[3] = video->palette[3];
574 video->dmgPalette[4] = video->palette[8 * 4 + 0];
575 video->dmgPalette[5] = video->palette[8 * 4 + 1];
576 video->dmgPalette[6] = video->palette[8 * 4 + 2];
577 video->dmgPalette[7] = video->palette[8 * 4 + 3];
578 video->dmgPalette[8] = video->palette[9 * 4 + 0];
579 video->dmgPalette[9] = video->palette[9 * 4 + 1];
580 video->dmgPalette[10] = video->palette[9 * 4 + 2];
581 video->dmgPalette[11] = video->palette[9 * 4 + 3];
582 video->renderer->deinit(video->renderer);
583 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
584}
585
586void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
587 int i;
588 if (!(video->sgbCommandHeader & 7)) {
589 video->sgbBufferIndex = 0;
590 if ((data[0] >> 3) > SGB_OBJ_TRN) {
591 video->sgbCommandHeader = 0;
592 return;
593 }
594 video->sgbCommandHeader = data[0];
595 }
596 --video->sgbCommandHeader;
597 memcpy(&video->sgbPacketBuffer[video->sgbBufferIndex << 4], data, 16);
598 ++video->sgbBufferIndex;
599 if (video->sgbCommandHeader & 7) {
600 return;
601 }
602 switch (video->sgbCommandHeader >> 3) {
603 case SGB_PAL01:
604 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
605 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
606 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
607 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
608
609 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
610 video->palette[5] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
611 video->palette[6] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
612 video->palette[7] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
613
614 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
615 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
616
617 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
618 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
619 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
620 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
621 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
622 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
623 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
624 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
625 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
626 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
627 break;
628 case SGB_PAL23:
629 video->palette[9] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
630 video->palette[10] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
631 video->palette[11] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
632
633 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
634 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
635 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
636 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
637 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
638 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
639 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
640 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
641 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
642 break;
643 case SGB_PAL03:
644 video->palette[0] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
645 video->palette[1] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
646 video->palette[2] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
647 video->palette[3] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
648
649 video->palette[4] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
650 video->palette[8] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
651
652 video->palette[12] = video->sgbPacketBuffer[1] | (video->sgbPacketBuffer[2] << 8);
653 video->palette[13] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
654 video->palette[14] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
655 video->palette[15] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
656 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
657 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
658 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
659 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
660 video->renderer->writePalette(video->renderer, 4, video->palette[4]);
661 video->renderer->writePalette(video->renderer, 8, video->palette[8]);
662 video->renderer->writePalette(video->renderer, 12, video->palette[12]);
663 video->renderer->writePalette(video->renderer, 13, video->palette[13]);
664 video->renderer->writePalette(video->renderer, 14, video->palette[14]);
665 video->renderer->writePalette(video->renderer, 15, video->palette[15]);
666 break;
667 case SGB_PAL12:
668 video->palette[5] = video->sgbPacketBuffer[3] | (video->sgbPacketBuffer[4] << 8);
669 video->palette[6] = video->sgbPacketBuffer[5] | (video->sgbPacketBuffer[6] << 8);
670 video->palette[7] = video->sgbPacketBuffer[7] | (video->sgbPacketBuffer[8] << 8);
671
672 video->palette[9] = video->sgbPacketBuffer[9] | (video->sgbPacketBuffer[10] << 8);
673 video->palette[10] = video->sgbPacketBuffer[11] | (video->sgbPacketBuffer[12] << 8);
674 video->palette[11] = video->sgbPacketBuffer[13] | (video->sgbPacketBuffer[14] << 8);
675 video->renderer->writePalette(video->renderer, 5, video->palette[5]);
676 video->renderer->writePalette(video->renderer, 6, video->palette[6]);
677 video->renderer->writePalette(video->renderer, 7, video->palette[7]);
678 video->renderer->writePalette(video->renderer, 9, video->palette[9]);
679 video->renderer->writePalette(video->renderer, 10, video->palette[10]);
680 video->renderer->writePalette(video->renderer, 11, video->palette[11]);
681 break;
682 case SGB_PAL_SET:
683 for (i = 0; i < 4; ++i) {
684 uint16_t entry = (video->sgbPacketBuffer[2 + (i * 2)] << 8) | video->sgbPacketBuffer[1 + (i * 2)];
685 if (entry >= 0x200) {
686 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
687 continue;
688 }
689 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
690 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[i * 4 + 0]);
691 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
692 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
693 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
694 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
695 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
696 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
697 }
698 break;
699 case SGB_ATTR_BLK:
700 case SGB_ATTR_DIV:
701 case SGB_ATTR_CHR:
702 case SGB_ATTR_LIN:
703 case SGB_PAL_TRN:
704 case SGB_ATRC_EN:
705 case SGB_CHR_TRN:
706 case SGB_PCT_TRN:
707 case SGB_ATTR_TRN:
708 case SGB_ATTR_SET:
709 break;
710 case SGB_MLT_REQ:
711 video->p->sgbControllers = video->sgbPacketBuffer[1] & 0x3;
712 video->p->sgbCurrentController = 0;
713 return;
714 case SGB_MASK_EN:
715 video->renderer->sgbRenderMode = video->sgbPacketBuffer[1] & 0x3;
716 break;
717 default:
718 mLOG(GB, STUB, "Unimplemented SGB command: %02X", video->sgbPacketBuffer[0] >> 3);
719 return;
720 }
721 video->renderer->writeSGBPacket(video->renderer, video->sgbPacketBuffer);
722}
723
724static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
725 UNUSED(renderer);
726 UNUSED(model);
727 UNUSED(borders);
728 // Nothing to do
729}
730
731static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
732 UNUSED(renderer);
733 // Nothing to do
734}
735
736static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
737 if (renderer->cache) {
738 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
739 }
740 return value;
741}
742
743static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
744 UNUSED(renderer);
745 UNUSED(data);
746}
747
748static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
749 if (renderer->cache) {
750 mCacheSetWriteVRAM(renderer->cache, address);
751 }
752}
753
754static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
755 UNUSED(renderer);
756 UNUSED(oam);
757 // Nothing to do
758}
759
760static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
761 if (renderer->cache) {
762 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
763 }
764}
765
766static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
767 UNUSED(renderer);
768 UNUSED(endX);
769 UNUSED(startX);
770 UNUSED(y);
771 UNUSED(obj);
772 UNUSED(oamMax);
773 // Nothing to do
774}
775
776static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
777 UNUSED(renderer);
778 UNUSED(y);
779 // Nothing to do
780}
781
782static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
783 UNUSED(renderer);
784 // Nothing to do
785}
786
787static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
788 UNUSED(renderer);
789 UNUSED(stride);
790 UNUSED(pixels);
791 // Nothing to do
792}
793
794static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
795 UNUSED(renderer);
796 UNUSED(stride);
797 UNUSED(pixels);
798 // Nothing to do
799}
800
801void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
802 STORE_16LE(video->x, 0, &state->video.x);
803 STORE_16LE(video->ly, 0, &state->video.ly);
804 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
805 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
806 state->video.vramCurrentBank = video->vramCurrentBank;
807
808 GBSerializedVideoFlags flags = 0;
809 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
810 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
811 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
812 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
813 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
814 state->video.flags = flags;
815 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
816 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
817
818 size_t i;
819 for (i = 0; i < 64; ++i) {
820 STORE_16LE(video->palette[i], i * 2, state->video.palette);
821 }
822
823 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
824 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
825
826 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
827 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
828}
829
830void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
831 LOAD_16LE(video->x, 0, &state->video.x);
832 LOAD_16LE(video->ly, 0, &state->video.ly);
833 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
834 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
835 video->vramCurrentBank = state->video.vramCurrentBank;
836
837 GBSerializedVideoFlags flags = state->video.flags;
838 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
839 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
840 video->mode = GBSerializedVideoFlagsGetMode(flags);
841 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
842 video->bcpIndex &= 0x3F;
843 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
844 video->ocpIndex &= 0x3F;
845
846 switch (video->mode) {
847 case 0:
848 video->modeEvent.callback = _endMode0;
849 break;
850 case 1:
851 video->modeEvent.callback = _endMode1;
852 break;
853 case 2:
854 video->modeEvent.callback = _endMode2;
855 break;
856 case 3:
857 video->modeEvent.callback = _endMode3;
858 break;
859 }
860
861 uint32_t when;
862 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
863 LOAD_32LE(when, 0, &state->video.nextMode);
864 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
865 }
866 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
867 LOAD_32LE(when, 0, &state->video.nextFrame);
868 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
869 }
870
871 size_t i;
872 for (i = 0; i < 64; ++i) {
873 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
874 video->renderer->writePalette(video->renderer, i, video->palette[i]);
875 }
876
877 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
878 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
879
880 _cleanOAM(video, video->ly);
881 GBVideoSwitchBank(video, video->vramCurrentBank);
882
883 video->renderer->deinit(video->renderer);
884 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
885}