src/gba/extra/proxy.c (view raw)
1/* Copyright (c) 2013-2017 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/gba/renderers/proxy.h>
7
8#include <mgba/core/cache-set.h>
9#include <mgba/internal/gba/gba.h>
10#include <mgba/internal/gba/io.h>
11
12static void GBAVideoProxyRendererInit(struct GBAVideoRenderer* renderer);
13static void GBAVideoProxyRendererReset(struct GBAVideoRenderer* renderer);
14static void GBAVideoProxyRendererDeinit(struct GBAVideoRenderer* renderer);
15static uint16_t GBAVideoProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
16static void GBAVideoProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
17static void GBAVideoProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
18static void GBAVideoProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
19static void GBAVideoProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
20static void GBAVideoProxyRendererFinishFrame(struct GBAVideoRenderer* renderer);
21static void GBAVideoProxyRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
22static void GBAVideoProxyRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
23
24static void _handleEvent(struct mVideoLogger* logger, enum mVideoLoggerEvent event);
25static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* packet);
26static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address);
27
28void GBAVideoProxyRendererCreate(struct GBAVideoProxyRenderer* renderer, struct GBAVideoRenderer* backend) {
29 renderer->d.init = GBAVideoProxyRendererInit;
30 renderer->d.reset = GBAVideoProxyRendererReset;
31 renderer->d.deinit = GBAVideoProxyRendererDeinit;
32 renderer->d.writeVideoRegister = GBAVideoProxyRendererWriteVideoRegister;
33 renderer->d.writeVRAM = GBAVideoProxyRendererWriteVRAM;
34 renderer->d.writeOAM = GBAVideoProxyRendererWriteOAM;
35 renderer->d.writePalette = GBAVideoProxyRendererWritePalette;
36 renderer->d.drawScanline = GBAVideoProxyRendererDrawScanline;
37 renderer->d.finishFrame = GBAVideoProxyRendererFinishFrame;
38 renderer->d.getPixels = GBAVideoProxyRendererGetPixels;
39 renderer->d.putPixels = GBAVideoProxyRendererPutPixels;
40
41 renderer->d.disableBG[0] = false;
42 renderer->d.disableBG[1] = false;
43 renderer->d.disableBG[2] = false;
44 renderer->d.disableBG[3] = false;
45 renderer->d.disableOBJ = false;
46
47 renderer->logger->context = renderer;
48 renderer->logger->parsePacket = _parsePacket;
49 renderer->logger->handleEvent = _handleEvent;
50 renderer->logger->vramBlock = _vramBlock;
51 renderer->logger->paletteSize = SIZE_PALETTE_RAM;
52 renderer->logger->vramSize = SIZE_VRAM;
53 renderer->logger->oamSize = SIZE_OAM;
54
55 renderer->backend = backend;
56}
57
58static void _init(struct GBAVideoProxyRenderer* proxyRenderer) {
59 mVideoLoggerRendererInit(proxyRenderer->logger);
60
61 if (proxyRenderer->logger->block) {
62 proxyRenderer->backend->palette = proxyRenderer->logger->palette;
63 proxyRenderer->backend->vram = proxyRenderer->logger->vram;
64 proxyRenderer->backend->oam = (union GBAOAM*) proxyRenderer->logger->oam;
65 proxyRenderer->backend->cache = NULL;
66 }
67}
68
69static void _reset(struct GBAVideoProxyRenderer* proxyRenderer) {
70 memcpy(proxyRenderer->logger->oam, &proxyRenderer->d.oam->raw, SIZE_OAM);
71 memcpy(proxyRenderer->logger->palette, proxyRenderer->d.palette, SIZE_PALETTE_RAM);
72 memcpy(proxyRenderer->logger->vram, proxyRenderer->d.vram, SIZE_VRAM);
73
74 mVideoLoggerRendererReset(proxyRenderer->logger);
75}
76
77void GBAVideoProxyRendererShim(struct GBAVideo* video, struct GBAVideoProxyRenderer* renderer) {
78 if ((renderer->backend && video->renderer != renderer->backend) || video->renderer == &renderer->d) {
79 return;
80 }
81 renderer->backend = video->renderer;
82 video->renderer = &renderer->d;
83 renderer->d.cache = renderer->backend->cache;
84 renderer->d.palette = video->palette;
85 renderer->d.vram = video->vram;
86 renderer->d.oam = &video->oam;
87 _init(renderer);
88 _reset(renderer);
89}
90
91void GBAVideoProxyRendererUnshim(struct GBAVideo* video, struct GBAVideoProxyRenderer* renderer) {
92 if (video->renderer != &renderer->d) {
93 return;
94 }
95 renderer->backend->cache = video->renderer->cache;
96 video->renderer = renderer->backend;
97 renderer->backend->palette = video->palette;
98 renderer->backend->vram = video->vram;
99 renderer->backend->oam = &video->oam;
100
101 mVideoLoggerRendererDeinit(renderer->logger);
102}
103
104void GBAVideoProxyRendererInit(struct GBAVideoRenderer* renderer) {
105 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
106
107 _init(proxyRenderer);
108 _reset(proxyRenderer);
109
110 if (!proxyRenderer->logger->block) {
111 proxyRenderer->backend->init(proxyRenderer->backend);
112 } else {
113 proxyRenderer->logger->postEvent(proxyRenderer->logger, LOGGER_EVENT_INIT);
114 }
115}
116
117void GBAVideoProxyRendererReset(struct GBAVideoRenderer* renderer) {
118 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
119
120 _reset(proxyRenderer);
121
122 if (!proxyRenderer->logger->block) {
123 proxyRenderer->backend->reset(proxyRenderer->backend);
124 } else {
125 proxyRenderer->logger->postEvent(proxyRenderer->logger, LOGGER_EVENT_RESET);
126 }
127}
128
129void GBAVideoProxyRendererDeinit(struct GBAVideoRenderer* renderer) {
130 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
131
132 if (!proxyRenderer->logger->block) {
133 proxyRenderer->backend->deinit(proxyRenderer->backend);
134 } else {
135 proxyRenderer->logger->postEvent(proxyRenderer->logger, LOGGER_EVENT_DEINIT);
136 }
137
138 mVideoLoggerRendererDeinit(proxyRenderer->logger);
139}
140
141static void _handleEvent(struct mVideoLogger* logger, enum mVideoLoggerEvent event) {
142 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
143 switch (event) {
144 default:
145 break;
146 case LOGGER_EVENT_INIT:
147 proxyRenderer->backend->init(proxyRenderer->backend);
148 break;
149 case LOGGER_EVENT_DEINIT:
150 proxyRenderer->backend->deinit(proxyRenderer->backend);
151 break;
152 case LOGGER_EVENT_RESET:
153 proxyRenderer->backend->reset(proxyRenderer->backend);
154 break;
155 case LOGGER_EVENT_GET_PIXELS:
156 proxyRenderer->backend->getPixels(proxyRenderer->backend, &logger->pixelStride, &logger->pixelBuffer);
157 break;
158 }
159}
160
161static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* item) {
162 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
163 switch (item->type) {
164 case DIRTY_REGISTER:
165 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, item->address, item->value);
166 break;
167 case DIRTY_PALETTE:
168 if (item->address < SIZE_PALETTE_RAM) {
169 logger->palette[item->address >> 1] = item->value;
170 proxyRenderer->backend->writePalette(proxyRenderer->backend, item->address, item->value);
171 }
172 break;
173 case DIRTY_OAM:
174 if (item->address < SIZE_OAM) {
175 logger->oam[item->address] = item->value;
176 proxyRenderer->backend->writeOAM(proxyRenderer->backend, item->address);
177 }
178 break;
179 case DIRTY_VRAM:
180 if (item->address <= SIZE_VRAM - 0x1000) {
181 logger->readData(logger, &logger->vram[item->address >> 1], 0x1000, true);
182 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, item->address);
183 } else {
184 logger->readData(logger, NULL, 0x1000, true);
185 }
186 break;
187 case DIRTY_SCANLINE:
188 proxyRenderer->backend->disableBG[0] = proxyRenderer->d.disableBG[0];
189 proxyRenderer->backend->disableBG[1] = proxyRenderer->d.disableBG[1];
190 proxyRenderer->backend->disableBG[2] = proxyRenderer->d.disableBG[2];
191 proxyRenderer->backend->disableBG[3] = proxyRenderer->d.disableBG[3];
192 proxyRenderer->backend->disableOBJ = proxyRenderer->d.disableOBJ;
193 if (item->address < GBA_VIDEO_VERTICAL_PIXELS) {
194 proxyRenderer->backend->drawScanline(proxyRenderer->backend, item->address);
195 }
196 break;
197 case DIRTY_FRAME:
198 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
199 break;
200 case DIRTY_FLUSH:
201 return false;
202 default:
203 return false;
204 }
205 return true;
206}
207
208static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address) {
209 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
210 return &proxyRenderer->d.vram[address >> 1];
211}
212
213uint16_t GBAVideoProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
214 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
215 switch (address) {
216 case REG_DISPCNT:
217 value &= 0xFFF7;
218 break;
219 case REG_BG0CNT:
220 case REG_BG1CNT:
221 value &= 0xDFFF;
222 break;
223 case REG_BG2CNT:
224 case REG_BG3CNT:
225 value &= 0xFFFF;
226 break;
227 case REG_BG0HOFS:
228 case REG_BG0VOFS:
229 case REG_BG1HOFS:
230 case REG_BG1VOFS:
231 case REG_BG2HOFS:
232 case REG_BG2VOFS:
233 case REG_BG3HOFS:
234 case REG_BG3VOFS:
235 value &= 0x01FF;
236 break;
237 }
238 if (address > REG_BLDY) {
239 return value;
240 }
241
242 mVideoLoggerRendererWriteVideoRegister(proxyRenderer->logger, address, value);
243 if (!proxyRenderer->logger->block) {
244 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, address, value);
245 }
246 return value;
247}
248
249void GBAVideoProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
250 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
251 mVideoLoggerRendererWriteVRAM(proxyRenderer->logger, address);
252 if (!proxyRenderer->logger->block) {
253 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, address);
254 }
255 if (renderer->cache) {
256 mCacheSetWriteVRAM(renderer->cache, address);
257 }
258}
259
260void GBAVideoProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
261 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
262 mVideoLoggerRendererWritePalette(proxyRenderer->logger, address, value);
263 if (!proxyRenderer->logger->block) {
264 proxyRenderer->backend->writePalette(proxyRenderer->backend, address, value);
265 }
266 if (renderer->cache) {
267 mCacheSetWritePalette(renderer->cache, address >> 1, mColorFrom555(value));
268 }
269}
270
271void GBAVideoProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
272 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
273 if (!proxyRenderer->logger->block) {
274 proxyRenderer->backend->writeOAM(proxyRenderer->backend, oam);
275 }
276 mVideoLoggerRendererWriteOAM(proxyRenderer->logger, oam, proxyRenderer->d.oam->raw[oam]);
277}
278
279void GBAVideoProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
280 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
281 if (!proxyRenderer->logger->block) {
282 proxyRenderer->backend->drawScanline(proxyRenderer->backend, y);
283 }
284 mVideoLoggerRendererDrawScanline(proxyRenderer->logger, y);
285 if (proxyRenderer->logger->block && proxyRenderer->logger->wake) {
286 proxyRenderer->logger->wake(proxyRenderer->logger, y);
287 }
288}
289
290void GBAVideoProxyRendererFinishFrame(struct GBAVideoRenderer* renderer) {
291 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
292 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
293 proxyRenderer->logger->lock(proxyRenderer->logger);
294 }
295 if (!proxyRenderer->logger->block) {
296 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
297 }
298 mVideoLoggerRendererFinishFrame(proxyRenderer->logger);
299 mVideoLoggerRendererFlush(proxyRenderer->logger);
300 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
301 proxyRenderer->logger->unlock(proxyRenderer->logger);
302 }
303}
304
305static void GBAVideoProxyRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
306 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
307 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
308 proxyRenderer->logger->lock(proxyRenderer->logger);
309 // Insert an extra item into the queue to make sure it gets flushed
310 mVideoLoggerRendererFlush(proxyRenderer->logger);
311 proxyRenderer->logger->postEvent(proxyRenderer->logger, LOGGER_EVENT_GET_PIXELS);
312 mVideoLoggerRendererFlush(proxyRenderer->logger);
313 proxyRenderer->logger->unlock(proxyRenderer->logger);
314 *pixels = proxyRenderer->logger->pixelBuffer;
315 *stride = proxyRenderer->logger->pixelStride;
316 } else {
317 proxyRenderer->backend->getPixels(proxyRenderer->backend, stride, pixels);
318 }
319}
320
321static void GBAVideoProxyRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
322 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
323 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
324 proxyRenderer->logger->lock(proxyRenderer->logger);
325 // Insert an extra item into the queue to make sure it gets flushed
326 mVideoLoggerRendererFlush(proxyRenderer->logger);
327 }
328 proxyRenderer->backend->putPixels(proxyRenderer->backend, stride, pixels);
329 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
330 proxyRenderer->logger->unlock(proxyRenderer->logger);
331 }
332}