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 }
156}
157
158static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* item) {
159 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
160 switch (item->type) {
161 case DIRTY_REGISTER:
162 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, item->address, item->value);
163 break;
164 case DIRTY_PALETTE:
165 if (item->address < SIZE_PALETTE_RAM) {
166 logger->palette[item->address >> 1] = item->value;
167 proxyRenderer->backend->writePalette(proxyRenderer->backend, item->address, item->value);
168 }
169 break;
170 case DIRTY_OAM:
171 if (item->address < SIZE_OAM) {
172 logger->oam[item->address] = item->value;
173 proxyRenderer->backend->writeOAM(proxyRenderer->backend, item->address);
174 }
175 break;
176 case DIRTY_VRAM:
177 if (item->address <= SIZE_VRAM - 0x1000) {
178 logger->readData(logger, &logger->vram[item->address >> 1], 0x1000, true);
179 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, item->address);
180 } else {
181 logger->readData(logger, NULL, 0x1000, true);
182 }
183 break;
184 case DIRTY_SCANLINE:
185 proxyRenderer->backend->disableBG[0] = proxyRenderer->d.disableBG[0];
186 proxyRenderer->backend->disableBG[1] = proxyRenderer->d.disableBG[1];
187 proxyRenderer->backend->disableBG[2] = proxyRenderer->d.disableBG[2];
188 proxyRenderer->backend->disableBG[3] = proxyRenderer->d.disableBG[3];
189 proxyRenderer->backend->disableOBJ = proxyRenderer->d.disableOBJ;
190 if (item->address < GBA_VIDEO_VERTICAL_PIXELS) {
191 proxyRenderer->backend->drawScanline(proxyRenderer->backend, item->address);
192 }
193 break;
194 case DIRTY_FRAME:
195 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
196 break;
197 case DIRTY_FLUSH:
198 return false;
199 default:
200 return false;
201 }
202 return true;
203}
204
205static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address) {
206 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
207 return &proxyRenderer->d.vram[address >> 1];
208}
209
210uint16_t GBAVideoProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
211 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
212 switch (address) {
213 case REG_DISPCNT:
214 value &= 0xFFF7;
215 break;
216 case REG_BG0CNT:
217 case REG_BG1CNT:
218 value &= 0xDFFF;
219 break;
220 case REG_BG2CNT:
221 case REG_BG3CNT:
222 value &= 0xFFFF;
223 break;
224 case REG_BG0HOFS:
225 case REG_BG0VOFS:
226 case REG_BG1HOFS:
227 case REG_BG1VOFS:
228 case REG_BG2HOFS:
229 case REG_BG2VOFS:
230 case REG_BG3HOFS:
231 case REG_BG3VOFS:
232 value &= 0x01FF;
233 break;
234 }
235 if (address > REG_BLDY) {
236 return value;
237 }
238
239 mVideoLoggerRendererWriteVideoRegister(proxyRenderer->logger, address, value);
240 if (!proxyRenderer->logger->block) {
241 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, address, value);
242 }
243 return value;
244}
245
246void GBAVideoProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
247 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
248 mVideoLoggerRendererWriteVRAM(proxyRenderer->logger, address);
249 if (!proxyRenderer->logger->block) {
250 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, address);
251 }
252 if (renderer->cache) {
253 mCacheSetWriteVRAM(renderer->cache, address);
254 }
255}
256
257void GBAVideoProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
258 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
259 mVideoLoggerRendererWritePalette(proxyRenderer->logger, address, value);
260 if (!proxyRenderer->logger->block) {
261 proxyRenderer->backend->writePalette(proxyRenderer->backend, address, value);
262 }
263 if (renderer->cache) {
264 mCacheSetWritePalette(renderer->cache, address >> 1, mColorFrom555(value));
265 }
266}
267
268void GBAVideoProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
269 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
270 if (!proxyRenderer->logger->block) {
271 proxyRenderer->backend->writeOAM(proxyRenderer->backend, oam);
272 }
273 mVideoLoggerRendererWriteOAM(proxyRenderer->logger, oam, proxyRenderer->d.oam->raw[oam]);
274}
275
276void GBAVideoProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
277 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
278 if (!proxyRenderer->logger->block) {
279 proxyRenderer->backend->drawScanline(proxyRenderer->backend, y);
280 }
281 mVideoLoggerRendererDrawScanline(proxyRenderer->logger, y);
282 if (proxyRenderer->logger->block && proxyRenderer->logger->wake) {
283 proxyRenderer->logger->wake(proxyRenderer->logger, y);
284 }
285}
286
287void GBAVideoProxyRendererFinishFrame(struct GBAVideoRenderer* renderer) {
288 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
289 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
290 proxyRenderer->logger->lock(proxyRenderer->logger);
291 }
292 if (!proxyRenderer->logger->block) {
293 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
294 }
295 mVideoLoggerRendererFinishFrame(proxyRenderer->logger);
296 mVideoLoggerRendererFlush(proxyRenderer->logger);
297 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
298 proxyRenderer->logger->unlock(proxyRenderer->logger);
299 }
300}
301
302static void GBAVideoProxyRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
303 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
304 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
305 proxyRenderer->logger->lock(proxyRenderer->logger);
306 // Insert an extra item into the queue to make sure it gets flushed
307 mVideoLoggerRendererFlush(proxyRenderer->logger);
308 }
309 proxyRenderer->backend->getPixels(proxyRenderer->backend, stride, pixels);
310 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
311 proxyRenderer->logger->unlock(proxyRenderer->logger);
312 }
313}
314
315static void GBAVideoProxyRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
316 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
317 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
318 proxyRenderer->logger->lock(proxyRenderer->logger);
319 // Insert an extra item into the queue to make sure it gets flushed
320 mVideoLoggerRendererFlush(proxyRenderer->logger);
321 }
322 proxyRenderer->backend->putPixels(proxyRenderer->backend, stride, pixels);
323 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
324 proxyRenderer->logger->unlock(proxyRenderer->logger);
325 }
326}