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 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 if (video->vram) {
103 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
104 }
105 video->vram = anonymousMemoryMap(GB_SIZE_VRAM);
106 GBVideoSwitchBank(video, 0);
107 video->renderer->vram = video->vram;
108 memset(&video->oam, 0, sizeof(video->oam));
109 video->renderer->oam = &video->oam;
110 memset(&video->palette, 0, sizeof(video->palette));
111
112 if (video->p->model == GB_MODEL_SGB) {
113 video->renderer->sgbCharRam = anonymousMemoryMap(SGB_SIZE_CHAR_RAM);
114 video->renderer->sgbMapRam = anonymousMemoryMap(SGB_SIZE_MAP_RAM);
115 video->renderer->sgbPalRam = anonymousMemoryMap(SGB_SIZE_PAL_RAM);
116 video->renderer->sgbAttributeFiles = anonymousMemoryMap(SGB_SIZE_ATF_RAM);
117 video->renderer->sgbAttributes = malloc(90 * 45);
118 memset(video->renderer->sgbAttributes, 0, 90 * 45);
119 video->sgbCommandHeader = 0;
120 }
121
122 video->palette[0] = video->dmgPalette[0];
123 video->palette[1] = video->dmgPalette[1];
124 video->palette[2] = video->dmgPalette[2];
125 video->palette[3] = video->dmgPalette[3];
126 video->palette[8 * 4 + 0] = video->dmgPalette[4];
127 video->palette[8 * 4 + 1] = video->dmgPalette[5];
128 video->palette[8 * 4 + 2] = video->dmgPalette[6];
129 video->palette[8 * 4 + 3] = video->dmgPalette[7];
130 video->palette[9 * 4 + 0] = video->dmgPalette[8];
131 video->palette[9 * 4 + 1] = video->dmgPalette[9];
132 video->palette[9 * 4 + 2] = video->dmgPalette[10];
133 video->palette[9 * 4 + 3] = video->dmgPalette[11];
134
135 video->renderer->deinit(video->renderer);
136 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
137
138 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
139 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
140 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
141 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
142 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
143 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
144 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
145 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
146 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
147 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
148 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
149 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
150}
151
152void GBVideoDeinit(struct GBVideo* video) {
153 GBVideoAssociateRenderer(video, &dummyRenderer);
154 mappedMemoryFree(video->vram, GB_SIZE_VRAM);
155 if (video->renderer->sgbCharRam) {
156 mappedMemoryFree(video->renderer->sgbCharRam, SGB_SIZE_CHAR_RAM);
157 video->renderer->sgbCharRam = NULL;
158 }
159 if (video->renderer->sgbMapRam) {
160 mappedMemoryFree(video->renderer->sgbMapRam, SGB_SIZE_MAP_RAM);
161 video->renderer->sgbMapRam = NULL;
162 }
163 if (video->renderer->sgbPalRam) {
164 mappedMemoryFree(video->renderer->sgbPalRam, SGB_SIZE_PAL_RAM);
165 video->renderer->sgbPalRam = NULL;
166 }
167 if (video->renderer->sgbAttributeFiles) {
168 mappedMemoryFree(video->renderer->sgbAttributeFiles, SGB_SIZE_ATF_RAM);
169 video->renderer->sgbAttributeFiles = NULL;
170 }
171 if (video->renderer->sgbAttributes) {
172 free(video->renderer->sgbAttributes);
173 video->renderer->sgbAttributes = NULL;
174 }
175}
176
177void GBVideoAssociateRenderer(struct GBVideo* video, struct GBVideoRenderer* renderer) {
178 video->renderer->deinit(video->renderer);
179 renderer->cache = video->renderer->cache;
180 renderer->sgbRenderMode = video->renderer->sgbRenderMode;
181 renderer->sgbCharRam = video->renderer->sgbCharRam;
182 renderer->sgbMapRam = video->renderer->sgbMapRam;
183 renderer->sgbPalRam = video->renderer->sgbPalRam;
184 renderer->sgbAttributeFiles = video->renderer->sgbAttributeFiles;
185 renderer->sgbAttributes = video->renderer->sgbAttributes;
186 video->renderer = renderer;
187 renderer->vram = video->vram;
188 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
189}
190
191static bool _statIRQAsserted(struct GBVideo* video, GBRegisterSTAT stat) {
192 // TODO: variable for the IRQ line value?
193 if (GBRegisterSTATIsLYCIRQ(stat) && GBRegisterSTATIsLYC(stat)) {
194 return true;
195 }
196 switch (GBRegisterSTATGetMode(stat)) {
197 case 0:
198 if (GBRegisterSTATIsHblankIRQ(stat)) {
199 return true;
200 }
201 break;
202 case 1:
203 if (GBRegisterSTATIsVblankIRQ(stat)) {
204 return true;
205 }
206 break;
207 case 2:
208 if (GBRegisterSTATIsOAMIRQ(stat)) {
209 return true;
210 }
211 break;
212 case 3:
213 break;
214 }
215 return false;
216}
217
218void _endMode0(struct mTiming* timing, void* context, uint32_t cyclesLate) {
219 struct GBVideo* video = context;
220 if (video->frameskipCounter <= 0) {
221 video->renderer->finishScanline(video->renderer, video->ly);
222 }
223 int lyc = video->p->memory.io[REG_LYC];
224 int32_t next;
225 ++video->ly;
226 video->p->memory.io[REG_LY] = video->ly;
227 GBRegisterSTAT oldStat = video->stat;
228 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->ly);
229 if (video->ly < GB_VIDEO_VERTICAL_PIXELS) {
230 // TODO: Cache SCX & 7 in case it changes during mode 2
231 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
232 video->mode = 2;
233 video->modeEvent.callback = _endMode2;
234 } else {
235 next = GB_VIDEO_HORIZONTAL_LENGTH;
236 video->mode = 1;
237 video->modeEvent.callback = _endMode1;
238
239 mTimingDeschedule(&video->p->timing, &video->frameEvent);
240 mTimingSchedule(&video->p->timing, &video->frameEvent, -cyclesLate);
241
242 if (!_statIRQAsserted(video, oldStat) && GBRegisterSTATIsOAMIRQ(video->stat)) {
243 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
244 }
245 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_VBLANK);
246 }
247 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
248 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
249 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
250 }
251 GBUpdateIRQs(video->p);
252 video->p->memory.io[REG_STAT] = video->stat;
253 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
254}
255
256void _endMode1(struct mTiming* timing, void* context, uint32_t cyclesLate) {
257 struct GBVideo* video = context;
258 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
259 return;
260 }
261 int lyc = video->p->memory.io[REG_LYC];
262 // TODO: One M-cycle delay
263 ++video->ly;
264 int32_t next;
265 if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS + 1) {
266 video->ly = 0;
267 video->p->memory.io[REG_LY] = video->ly;
268 next = GB_VIDEO_MODE_2_LENGTH + (video->p->memory.io[REG_SCX] & 7);
269 video->mode = 2;
270 video->modeEvent.callback = _endMode2;
271 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
272 video->p->memory.io[REG_LY] = 0;
273 next = GB_VIDEO_HORIZONTAL_LENGTH - 8;
274 } else if (video->ly == GB_VIDEO_VERTICAL_TOTAL_PIXELS - 1) {
275 video->p->memory.io[REG_LY] = video->ly;
276 next = 8;
277 } else {
278 video->p->memory.io[REG_LY] = video->ly;
279 next = GB_VIDEO_HORIZONTAL_LENGTH;
280 }
281
282 GBRegisterSTAT oldStat = video->stat;
283 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
284 video->stat = GBRegisterSTATSetLYC(video->stat, lyc == video->p->memory.io[REG_LY]);
285 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
286 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
287 GBUpdateIRQs(video->p);
288 }
289 video->p->memory.io[REG_STAT] = video->stat;
290 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
291}
292
293void _endMode2(struct mTiming* timing, void* context, uint32_t cyclesLate) {
294 struct GBVideo* video = context;
295 _cleanOAM(video, video->ly);
296 video->x = 0;
297 video->dotClock = mTimingCurrentTime(timing) - cyclesLate;
298 int32_t next = GB_VIDEO_MODE_3_LENGTH_BASE + video->objMax * 6 - (video->p->memory.io[REG_SCX] & 7);
299 video->mode = 3;
300 video->modeEvent.callback = _endMode3;
301 GBRegisterSTAT oldStat = video->stat;
302 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
303 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
304 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
305 GBUpdateIRQs(video->p);
306 }
307 video->p->memory.io[REG_STAT] = video->stat;
308 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
309}
310
311void _endMode3(struct mTiming* timing, void* context, uint32_t cyclesLate) {
312 struct GBVideo* video = context;
313 GBVideoProcessDots(video, cyclesLate);
314 if (video->ly < GB_VIDEO_VERTICAL_PIXELS && video->p->memory.isHdma && video->p->memory.io[REG_HDMA5] != 0xFF) {
315 video->p->memory.hdmaRemaining = 0x10;
316 video->p->cpuBlocked = true;
317 mTimingDeschedule(timing, &video->p->memory.hdmaEvent);
318 mTimingSchedule(timing, &video->p->memory.hdmaEvent, 0);
319 }
320 video->mode = 0;
321 video->modeEvent.callback = _endMode0;
322 GBRegisterSTAT oldStat = video->stat;
323 video->stat = GBRegisterSTATSetMode(video->stat, video->mode);
324 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
325 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
326 GBUpdateIRQs(video->p);
327 }
328 video->p->memory.io[REG_STAT] = video->stat;
329 int32_t next = GB_VIDEO_MODE_0_LENGTH_BASE - video->objMax * 6;
330 mTimingSchedule(timing, &video->modeEvent, (next << video->p->doubleSpeed) - cyclesLate);
331}
332
333void _updateFrameCount(struct mTiming* timing, void* context, uint32_t cyclesLate) {
334 UNUSED(cyclesLate);
335 struct GBVideo* video = context;
336 if (video->p->cpu->executionState != LR35902_CORE_FETCH) {
337 mTimingSchedule(timing, &video->frameEvent, 4 - ((video->p->cpu->executionState + 1) & 3));
338 return;
339 }
340
341 size_t c;
342 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
343 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
344 if (callbacks->videoFrameEnded) {
345 callbacks->videoFrameEnded(callbacks->context);
346 }
347 }
348
349 GBFrameEnded(video->p);
350 mCoreSyncPostFrame(video->p->sync);
351 --video->frameskipCounter;
352 if (video->frameskipCounter < 0) {
353 video->renderer->finishFrame(video->renderer);
354 video->frameskipCounter = video->frameskip;
355 }
356 ++video->frameCounter;
357
358 // TODO: Move to common code
359 if (video->p->stream && video->p->stream->postVideoFrame) {
360 const color_t* pixels;
361 size_t stride;
362 video->renderer->getPixels(video->renderer, &stride, (const void**) &pixels);
363 video->p->stream->postVideoFrame(video->p->stream, pixels, stride);
364 }
365
366 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC])) {
367 mTimingSchedule(timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
368 }
369
370 for (c = 0; c < mCoreCallbacksListSize(&video->p->coreCallbacks); ++c) {
371 struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&video->p->coreCallbacks, c);
372 if (callbacks->videoFrameStarted) {
373 callbacks->videoFrameStarted(callbacks->context);
374 }
375 }
376}
377
378static void _cleanOAM(struct GBVideo* video, int y) {
379 // TODO: GBC differences
380 // TODO: Optimize
381 video->objMax = 0;
382 int spriteHeight = 8;
383 if (GBRegisterLCDCIsObjSize(video->p->memory.io[REG_LCDC])) {
384 spriteHeight = 16;
385 }
386 int o = 0;
387 int i;
388 for (i = 0; i < 40; ++i) {
389 uint8_t oy = video->oam.obj[i].y;
390 if (y < oy - 16 || y >= oy - 16 + spriteHeight) {
391 continue;
392 }
393 // TODO: Sort
394 video->objThisLine[o] = video->oam.obj[i];
395 ++o;
396 if (o == 10) {
397 break;
398 }
399 }
400 video->objMax = o;
401}
402
403void GBVideoProcessDots(struct GBVideo* video, uint32_t cyclesLate) {
404 if (video->mode != 3) {
405 return;
406 }
407 int oldX = video->x;
408 video->x = (mTimingCurrentTime(&video->p->timing) - video->dotClock - cyclesLate) >> video->p->doubleSpeed;
409 if (video->x > GB_VIDEO_HORIZONTAL_PIXELS) {
410 video->x = GB_VIDEO_HORIZONTAL_PIXELS;
411 } else if (video->x < 0) {
412 mLOG(GB, FATAL, "Video dot clock went negative!");
413 video->x = oldX;
414 }
415 if (video->frameskipCounter <= 0) {
416 video->renderer->drawRange(video->renderer, oldX, video->x, video->ly, video->objThisLine, video->objMax);
417 }
418}
419
420void GBVideoWriteLCDC(struct GBVideo* video, GBRegisterLCDC value) {
421 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) && GBRegisterLCDCIsEnable(value)) {
422 video->mode = 2;
423 video->modeEvent.callback = _endMode2;
424 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
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->stat = GBRegisterSTATSetMode(video->stat, 0);
444 video->p->memory.io[REG_STAT] = video->stat;
445 video->ly = 0;
446 video->p->memory.io[REG_LY] = 0;
447 video->renderer->writePalette(video->renderer, 0, video->dmgPalette[0]);
448
449 mTimingDeschedule(&video->p->timing, &video->modeEvent);
450 mTimingSchedule(&video->p->timing, &video->frameEvent, GB_VIDEO_TOTAL_LENGTH);
451 }
452 video->p->memory.io[REG_STAT] = video->stat;
453}
454
455void GBVideoWriteSTAT(struct GBVideo* video, GBRegisterSTAT value) {
456 GBRegisterSTAT oldStat = video->stat;
457 video->stat = (video->stat & 0x7) | (value & 0x78);
458 if (!GBRegisterLCDCIsEnable(video->p->memory.io[REG_LCDC]) || video->p->model >= GB_MODEL_CGB) {
459 return;
460 }
461 if (!_statIRQAsserted(video, oldStat) && video->mode < 3) {
462 // TODO: variable for the IRQ line value?
463 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
464 GBUpdateIRQs(video->p);
465 }
466}
467
468void GBVideoWriteLYC(struct GBVideo* video, uint8_t value) {
469 GBRegisterSTAT oldStat = video->stat;
470 video->stat = GBRegisterSTATSetLYC(video->stat, value == video->ly);
471 if (!_statIRQAsserted(video, oldStat) && _statIRQAsserted(video, video->stat)) {
472 video->p->memory.io[REG_IF] |= (1 << GB_IRQ_LCDSTAT);
473 GBUpdateIRQs(video->p);
474 }
475 video->p->memory.io[REG_STAT] = video->stat;
476}
477
478void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value) {
479 if (video->p->model < GB_MODEL_SGB) {
480 switch (address) {
481 case REG_BGP:
482 video->palette[0] = video->dmgPalette[value & 3];
483 video->palette[1] = video->dmgPalette[(value >> 2) & 3];
484 video->palette[2] = video->dmgPalette[(value >> 4) & 3];
485 video->palette[3] = video->dmgPalette[(value >> 6) & 3];
486 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
487 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
488 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
489 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
490 break;
491 case REG_OBP0:
492 video->palette[8 * 4 + 0] = video->dmgPalette[(value & 3) + 4];
493 video->palette[8 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 4];
494 video->palette[8 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 4];
495 video->palette[8 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 4];
496 video->renderer->writePalette(video->renderer, 8 * 4 + 0, video->palette[8 * 4 + 0]);
497 video->renderer->writePalette(video->renderer, 8 * 4 + 1, video->palette[8 * 4 + 1]);
498 video->renderer->writePalette(video->renderer, 8 * 4 + 2, video->palette[8 * 4 + 2]);
499 video->renderer->writePalette(video->renderer, 8 * 4 + 3, video->palette[8 * 4 + 3]);
500 break;
501 case REG_OBP1:
502 video->palette[9 * 4 + 0] = video->dmgPalette[(value & 3) + 8];
503 video->palette[9 * 4 + 1] = video->dmgPalette[((value >> 2) & 3) + 8];
504 video->palette[9 * 4 + 2] = video->dmgPalette[((value >> 4) & 3) + 8];
505 video->palette[9 * 4 + 3] = video->dmgPalette[((value >> 6) & 3) + 8];
506 video->renderer->writePalette(video->renderer, 9 * 4 + 0, video->palette[9 * 4 + 0]);
507 video->renderer->writePalette(video->renderer, 9 * 4 + 1, video->palette[9 * 4 + 1]);
508 video->renderer->writePalette(video->renderer, 9 * 4 + 2, video->palette[9 * 4 + 2]);
509 video->renderer->writePalette(video->renderer, 9 * 4 + 3, video->palette[9 * 4 + 3]);
510 break;
511 }
512 } else if (video->p->model == GB_MODEL_SGB) {
513 video->renderer->writeVideoRegister(video->renderer, address, value);
514 } else {
515 switch (address) {
516 case REG_BCPD:
517 if (video->bcpIndex & 1) {
518 video->palette[video->bcpIndex >> 1] &= 0x00FF;
519 video->palette[video->bcpIndex >> 1] |= value << 8;
520 } else {
521 video->palette[video->bcpIndex >> 1] &= 0xFF00;
522 video->palette[video->bcpIndex >> 1] |= value;
523 }
524 video->renderer->writePalette(video->renderer, video->bcpIndex >> 1, video->palette[video->bcpIndex >> 1]);
525 if (video->bcpIncrement) {
526 ++video->bcpIndex;
527 video->bcpIndex &= 0x3F;
528 video->p->memory.io[REG_BCPS] &= 0x80;
529 video->p->memory.io[REG_BCPS] |= video->bcpIndex;
530 }
531 video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1] >> (8 * (video->bcpIndex & 1));
532 break;
533 case REG_OCPD:
534 if (video->ocpIndex & 1) {
535 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0x00FF;
536 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value << 8;
537 } else {
538 video->palette[8 * 4 + (video->ocpIndex >> 1)] &= 0xFF00;
539 video->palette[8 * 4 + (video->ocpIndex >> 1)] |= value;
540 }
541 video->renderer->writePalette(video->renderer, 8 * 4 + (video->ocpIndex >> 1), video->palette[8 * 4 + (video->ocpIndex >> 1)]);
542 if (video->ocpIncrement) {
543 ++video->ocpIndex;
544 video->ocpIndex &= 0x3F;
545 video->p->memory.io[REG_OCPS] &= 0x80;
546 video->p->memory.io[REG_OCPS] |= video->ocpIndex;
547 }
548 video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)] >> (8 * (video->ocpIndex & 1));
549 break;
550 }
551 }
552}
553
554void GBVideoSwitchBank(struct GBVideo* video, uint8_t value) {
555 value &= 1;
556 video->vramBank = &video->vram[value * GB_SIZE_VRAM_BANK0];
557 video->vramCurrentBank = value;
558}
559
560void GBVideoSetPalette(struct GBVideo* video, unsigned index, uint32_t color) {
561 if (index >= 12) {
562 return;
563 }
564 video->dmgPalette[index] = M_RGB8_TO_RGB5(color);
565}
566
567void GBVideoDisableCGB(struct GBVideo* video) {
568 video->dmgPalette[0] = video->palette[0];
569 video->dmgPalette[1] = video->palette[1];
570 video->dmgPalette[2] = video->palette[2];
571 video->dmgPalette[3] = video->palette[3];
572 video->dmgPalette[4] = video->palette[8 * 4 + 0];
573 video->dmgPalette[5] = video->palette[8 * 4 + 1];
574 video->dmgPalette[6] = video->palette[8 * 4 + 2];
575 video->dmgPalette[7] = video->palette[8 * 4 + 3];
576 video->dmgPalette[8] = video->palette[9 * 4 + 0];
577 video->dmgPalette[9] = video->palette[9 * 4 + 1];
578 video->dmgPalette[10] = video->palette[9 * 4 + 2];
579 video->dmgPalette[11] = video->palette[9 * 4 + 3];
580 video->renderer->deinit(video->renderer);
581 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
582}
583
584void GBVideoWriteSGBPacket(struct GBVideo* video, uint8_t* data) {
585 int i;
586 if (!(video->sgbCommandHeader & 7)) {
587 if ((data[0] >> 3) > SGB_OBJ_TRN) {
588 video->sgbCommandHeader = 0;
589 return;
590 }
591 video->sgbCommandHeader = data[0];
592 }
593 --video->sgbCommandHeader;
594 switch (video->sgbCommandHeader >> 3) {
595 case SGB_PAL01:
596 video->palette[0] = data[1] | (data[2] << 8);
597 video->palette[1] = data[3] | (data[4] << 8);
598 video->palette[2] = data[5] | (data[6] << 8);
599 video->palette[3] = data[7] | (data[8] << 8);
600
601 video->palette[16] = data[1] | (data[2] << 8);
602 video->palette[17] = data[9] | (data[10] << 8);
603 video->palette[18] = data[11] | (data[12] << 8);
604 video->palette[19] = data[13] | (data[14] << 8);
605
606 video->palette[32] = data[1] | (data[2] << 8);
607 video->palette[48] = data[1] | (data[2] << 8);
608
609 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
610 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
611 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
612 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
613 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
614 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
615 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
616 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
617 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
618 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
619 break;
620 case SGB_PAL23:
621 video->palette[33] = data[3] | (data[4] << 8);
622 video->palette[34] = data[5] | (data[6] << 8);
623 video->palette[35] = data[7] | (data[8] << 8);
624
625 video->palette[49] = data[9] | (data[10] << 8);
626 video->palette[50] = data[11] | (data[12] << 8);
627 video->palette[51] = data[13] | (data[14] << 8);
628 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
629 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
630 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
631 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
632 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
633 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
634 break;
635 case SGB_PAL03:
636 video->palette[0] = data[1] | (data[2] << 8);
637 video->palette[1] = data[3] | (data[4] << 8);
638 video->palette[2] = data[5] | (data[6] << 8);
639 video->palette[3] = data[7] | (data[8] << 8);
640
641 video->palette[16] = data[1] | (data[2] << 8);
642 video->palette[32] = data[1] | (data[2] << 8);
643
644 video->palette[48] = data[1] | (data[2] << 8);
645 video->palette[49] = data[9] | (data[10] << 8);
646 video->palette[50] = data[11] | (data[12] << 8);
647 video->palette[51] = data[13] | (data[14] << 8);
648 video->renderer->writePalette(video->renderer, 0, video->palette[0]);
649 video->renderer->writePalette(video->renderer, 1, video->palette[1]);
650 video->renderer->writePalette(video->renderer, 2, video->palette[2]);
651 video->renderer->writePalette(video->renderer, 3, video->palette[3]);
652 video->renderer->writePalette(video->renderer, 16, video->palette[0]);
653 video->renderer->writePalette(video->renderer, 32, video->palette[0]);
654 video->renderer->writePalette(video->renderer, 48, video->palette[0]);
655 video->renderer->writePalette(video->renderer, 49, video->palette[49]);
656 video->renderer->writePalette(video->renderer, 50, video->palette[50]);
657 video->renderer->writePalette(video->renderer, 51, video->palette[51]);
658 break;
659 case SGB_PAL12:
660 video->palette[17] = data[3] | (data[4] << 8);
661 video->palette[18] = data[5] | (data[6] << 8);
662 video->palette[19] = data[7] | (data[8] << 8);
663
664 video->palette[33] = data[9] | (data[10] << 8);
665 video->palette[34] = data[11] | (data[12] << 8);
666 video->palette[35] = data[13] | (data[14] << 8);
667 video->renderer->writePalette(video->renderer, 17, video->palette[17]);
668 video->renderer->writePalette(video->renderer, 18, video->palette[18]);
669 video->renderer->writePalette(video->renderer, 19, video->palette[19]);
670 video->renderer->writePalette(video->renderer, 33, video->palette[33]);
671 video->renderer->writePalette(video->renderer, 34, video->palette[34]);
672 video->renderer->writePalette(video->renderer, 35, video->palette[35]);
673 break;
674 case SGB_PAL_SET:
675 for (i = 0; i < 4; ++i) {
676 uint16_t entry = (data[2 + (i * 2)] << 8) | data[1 + (i * 2)];
677 if (entry >= 0x200) {
678 mLOG(GB, STUB, "Unimplemented SGB palette overflow: %03X", entry);
679 continue;
680 }
681 LOAD_16LE(video->palette[i * 4 + 0], entry * 8 + 0, video->renderer->sgbPalRam);
682 video->renderer->writePalette(video->renderer, i * 4 + 0, video->palette[0]);
683 LOAD_16LE(video->palette[i * 4 + 1], entry * 8 + 2, video->renderer->sgbPalRam);
684 video->renderer->writePalette(video->renderer, i * 4 + 1, video->palette[i * 4 + 1]);
685 LOAD_16LE(video->palette[i * 4 + 2], entry * 8 + 4, video->renderer->sgbPalRam);
686 video->renderer->writePalette(video->renderer, i * 4 + 2, video->palette[i * 4 + 2]);
687 LOAD_16LE(video->palette[i * 4 + 3], entry * 8 + 6, video->renderer->sgbPalRam);
688 video->renderer->writePalette(video->renderer, i * 4 + 3, video->palette[i * 4 + 3]);
689 }
690 break;
691 case SGB_ATTR_BLK:
692 case SGB_PAL_TRN:
693 case SGB_ATRC_EN:
694 case SGB_CHR_TRN:
695 case SGB_PCT_TRN:
696 case SGB_ATTR_TRN:
697 case SGB_ATTR_SET:
698 break;
699 case SGB_MLT_REG:
700 return;
701 case SGB_MASK_EN:
702 video->renderer->sgbRenderMode = data[1] & 0x3;
703 break;
704 default:
705 mLOG(GB, STUB, "Unimplemented SGB command: %02X", data[0] >> 3);
706 return;
707 }
708 video->renderer->writeSGBPacket(video->renderer, data);
709}
710
711static void GBVideoDummyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
712 UNUSED(renderer);
713 UNUSED(model);
714 UNUSED(borders);
715 // Nothing to do
716}
717
718static void GBVideoDummyRendererDeinit(struct GBVideoRenderer* renderer) {
719 UNUSED(renderer);
720 // Nothing to do
721}
722
723static uint8_t GBVideoDummyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
724 if (renderer->cache) {
725 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
726 }
727 return value;
728}
729
730static void GBVideoDummyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
731 UNUSED(renderer);
732 UNUSED(data);
733}
734
735static void GBVideoDummyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
736 if (renderer->cache) {
737 mCacheSetWriteVRAM(renderer->cache, address);
738 }
739}
740
741static void GBVideoDummyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
742 UNUSED(renderer);
743 UNUSED(oam);
744 // Nothing to do
745}
746
747static void GBVideoDummyRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
748 if (renderer->cache) {
749 mCacheSetWritePalette(renderer->cache, index, mColorFrom555(value));
750 }
751}
752
753static void GBVideoDummyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
754 UNUSED(renderer);
755 UNUSED(endX);
756 UNUSED(startX);
757 UNUSED(y);
758 UNUSED(obj);
759 UNUSED(oamMax);
760 // Nothing to do
761}
762
763static void GBVideoDummyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
764 UNUSED(renderer);
765 UNUSED(y);
766 // Nothing to do
767}
768
769static void GBVideoDummyRendererFinishFrame(struct GBVideoRenderer* renderer) {
770 UNUSED(renderer);
771 // Nothing to do
772}
773
774static void GBVideoDummyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
775 UNUSED(renderer);
776 UNUSED(stride);
777 UNUSED(pixels);
778 // Nothing to do
779}
780
781static void GBVideoDummyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
782 UNUSED(renderer);
783 UNUSED(stride);
784 UNUSED(pixels);
785 // Nothing to do
786}
787
788void GBVideoSerialize(const struct GBVideo* video, struct GBSerializedState* state) {
789 STORE_16LE(video->x, 0, &state->video.x);
790 STORE_16LE(video->ly, 0, &state->video.ly);
791 STORE_32LE(video->frameCounter, 0, &state->video.frameCounter);
792 STORE_32LE(video->dotClock, 0, &state->video.dotCounter);
793 state->video.vramCurrentBank = video->vramCurrentBank;
794
795 GBSerializedVideoFlags flags = 0;
796 flags = GBSerializedVideoFlagsSetBcpIncrement(flags, video->bcpIncrement);
797 flags = GBSerializedVideoFlagsSetOcpIncrement(flags, video->ocpIncrement);
798 flags = GBSerializedVideoFlagsSetMode(flags, video->mode);
799 flags = GBSerializedVideoFlagsSetNotModeEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->modeEvent));
800 flags = GBSerializedVideoFlagsSetNotFrameEventScheduled(flags, !mTimingIsScheduled(&video->p->timing, &video->frameEvent));
801 state->video.flags = flags;
802 STORE_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
803 STORE_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
804
805 size_t i;
806 for (i = 0; i < 64; ++i) {
807 STORE_16LE(video->palette[i], i * 2, state->video.palette);
808 }
809
810 STORE_32LE(video->modeEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextMode);
811 STORE_32LE(video->frameEvent.when - mTimingCurrentTime(&video->p->timing), 0, &state->video.nextFrame);
812
813 memcpy(state->vram, video->vram, GB_SIZE_VRAM);
814 memcpy(state->oam, &video->oam.raw, GB_SIZE_OAM);
815}
816
817void GBVideoDeserialize(struct GBVideo* video, const struct GBSerializedState* state) {
818 LOAD_16LE(video->x, 0, &state->video.x);
819 LOAD_16LE(video->ly, 0, &state->video.ly);
820 LOAD_32LE(video->frameCounter, 0, &state->video.frameCounter);
821 LOAD_32LE(video->dotClock, 0, &state->video.dotCounter);
822 video->vramCurrentBank = state->video.vramCurrentBank;
823
824 GBSerializedVideoFlags flags = state->video.flags;
825 video->bcpIncrement = GBSerializedVideoFlagsGetBcpIncrement(flags);
826 video->ocpIncrement = GBSerializedVideoFlagsGetOcpIncrement(flags);
827 video->mode = GBSerializedVideoFlagsGetMode(flags);
828 LOAD_16LE(video->bcpIndex, 0, &state->video.bcpIndex);
829 video->bcpIndex &= 0x3F;
830 LOAD_16LE(video->ocpIndex, 0, &state->video.ocpIndex);
831 video->ocpIndex &= 0x3F;
832
833 switch (video->mode) {
834 case 0:
835 video->modeEvent.callback = _endMode0;
836 break;
837 case 1:
838 video->modeEvent.callback = _endMode1;
839 break;
840 case 2:
841 video->modeEvent.callback = _endMode2;
842 break;
843 case 3:
844 video->modeEvent.callback = _endMode3;
845 break;
846 }
847
848 uint32_t when;
849 if (!GBSerializedVideoFlagsIsNotModeEventScheduled(flags)) {
850 LOAD_32LE(when, 0, &state->video.nextMode);
851 mTimingSchedule(&video->p->timing, &video->modeEvent, when);
852 }
853 if (!GBSerializedVideoFlagsIsNotFrameEventScheduled(flags)) {
854 LOAD_32LE(when, 0, &state->video.nextFrame);
855 mTimingSchedule(&video->p->timing, &video->frameEvent, when);
856 }
857
858 size_t i;
859 for (i = 0; i < 64; ++i) {
860 LOAD_16LE(video->palette[i], i * 2, state->video.palette);
861 video->renderer->writePalette(video->renderer, i, video->palette[i]);
862 }
863
864 memcpy(video->vram, state->vram, GB_SIZE_VRAM);
865 memcpy(&video->oam.raw, state->oam, GB_SIZE_OAM);
866
867 _cleanOAM(video, video->ly);
868 GBVideoSwitchBank(video, video->vramCurrentBank);
869
870 video->renderer->deinit(video->renderer);
871 video->renderer->init(video->renderer, video->p->model, video->sgbBorders);
872}