src/gb/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/gb/renderers/proxy.h>
7
8#include <mgba/core/cache-set.h>
9#include <mgba/internal/gb/gb.h>
10#include <mgba/internal/gb/io.h>
11
12#define BUFFER_OAM 1
13#define BUFFER_SGB 2
14
15static void GBVideoProxyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
16static void GBVideoProxyRendererDeinit(struct GBVideoRenderer* renderer);
17static uint8_t GBVideoProxyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
18static void GBVideoProxyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
19static void GBVideoProxyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
20static void GBVideoProxyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
21static void GBVideoProxyRendererWritePalette(struct GBVideoRenderer* renderer, int address, uint16_t value);
22static void GBVideoProxyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
23static void GBVideoProxyRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
24static void GBVideoProxyRendererFinishFrame(struct GBVideoRenderer* renderer);
25static void GBVideoProxyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable);
26static void GBVideoProxyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
27static void GBVideoProxyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
28
29static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* packet);
30static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address);
31
32void GBVideoProxyRendererCreate(struct GBVideoProxyRenderer* renderer, struct GBVideoRenderer* backend) {
33 renderer->d.init = GBVideoProxyRendererInit;
34 renderer->d.deinit = GBVideoProxyRendererDeinit;
35 renderer->d.writeVideoRegister = GBVideoProxyRendererWriteVideoRegister;
36 renderer->d.writeSGBPacket = GBVideoProxyRendererWriteSGBPacket;
37 renderer->d.writeVRAM = GBVideoProxyRendererWriteVRAM;
38 renderer->d.writeOAM = GBVideoProxyRendererWriteOAM;
39 renderer->d.writePalette = GBVideoProxyRendererWritePalette;
40 renderer->d.drawRange = GBVideoProxyRendererDrawRange;
41 renderer->d.finishScanline = GBVideoProxyRendererFinishScanline;
42 renderer->d.finishFrame = GBVideoProxyRendererFinishFrame;
43 renderer->d.enableSGBBorder = GBVideoProxyRendererEnableSGBBorder;
44 renderer->d.getPixels = GBVideoProxyRendererGetPixels;
45 renderer->d.putPixels = GBVideoProxyRendererPutPixels;
46
47 renderer->d.disableBG = false;
48 renderer->d.disableWIN = false;
49 renderer->d.disableOBJ = false;
50
51 renderer->logger->context = renderer;
52 renderer->logger->parsePacket = _parsePacket;
53 renderer->logger->vramBlock = _vramBlock;
54 renderer->logger->paletteSize = 0;
55 renderer->logger->vramSize = GB_SIZE_VRAM;
56 renderer->logger->oamSize = GB_SIZE_OAM;
57
58 renderer->backend = backend;
59}
60
61static void _init(struct GBVideoProxyRenderer* proxyRenderer) {
62 mVideoLoggerRendererInit(proxyRenderer->logger);
63
64 if (proxyRenderer->logger->block) {
65 proxyRenderer->backend->vram = (uint8_t*) proxyRenderer->logger->vram;
66 proxyRenderer->backend->oam = (union GBOAM*) proxyRenderer->logger->oam;
67 proxyRenderer->backend->cache = NULL;
68 }
69}
70
71static void _reset(struct GBVideoProxyRenderer* proxyRenderer) {
72 memcpy(proxyRenderer->logger->oam, &proxyRenderer->d.oam->raw, GB_SIZE_OAM);
73 memcpy(proxyRenderer->logger->vram, proxyRenderer->d.vram, GB_SIZE_VRAM);
74
75 proxyRenderer->oamMax = 0;
76
77 mVideoLoggerRendererReset(proxyRenderer->logger);
78}
79
80void GBVideoProxyRendererShim(struct GBVideo* video, struct GBVideoProxyRenderer* renderer) {
81 if ((renderer->backend && video->renderer != renderer->backend) || video->renderer == &renderer->d) {
82 return;
83 }
84 renderer->backend = video->renderer;
85 video->renderer = &renderer->d;
86 renderer->d.cache = renderer->backend->cache;
87 renderer->d.vram = video->vram;
88 renderer->d.oam = &video->oam;
89 _init(renderer);
90 _reset(renderer);
91}
92
93void GBVideoProxyRendererUnshim(struct GBVideo* video, struct GBVideoProxyRenderer* renderer) {
94 if (video->renderer != &renderer->d) {
95 return;
96 }
97 renderer->backend->cache = video->renderer->cache;
98 video->renderer = renderer->backend;
99 renderer->backend->vram = video->vram;
100 renderer->backend->oam = &video->oam;
101
102 mVideoLoggerRendererDeinit(renderer->logger);
103}
104
105void GBVideoProxyRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders) {
106 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
107
108 _init(proxyRenderer);
109
110 proxyRenderer->backend->init(proxyRenderer->backend, model, borders);
111}
112
113void GBVideoProxyRendererDeinit(struct GBVideoRenderer* renderer) {
114 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
115
116 proxyRenderer->backend->deinit(proxyRenderer->backend);
117
118 mVideoLoggerRendererDeinit(proxyRenderer->logger);
119}
120
121static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* item) {
122 struct GBVideoProxyRenderer* proxyRenderer = logger->context;
123 uint8_t sgbPacket[16];
124 switch (item->type) {
125 case DIRTY_REGISTER:
126 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, item->address, item->value);
127 break;
128 case DIRTY_PALETTE:
129 if (item->address < 64) {
130 proxyRenderer->backend->writePalette(proxyRenderer->backend, item->address, item->value);
131 }
132 break;
133 case DIRTY_OAM:
134 if (item->address < GB_SIZE_OAM) {
135 ((uint8_t*) logger->oam)[item->address] = item->value;
136 proxyRenderer->backend->writeOAM(proxyRenderer->backend, item->address);
137 }
138 break;
139 case DIRTY_VRAM:
140 if (item->address <= GB_SIZE_VRAM - 0x1000) {
141 logger->readData(logger, &logger->vram[item->address >> 1], 0x1000, true);
142 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, item->address);
143 }
144 break;
145 case DIRTY_SCANLINE:
146 proxyRenderer->backend->disableBG = proxyRenderer->d.disableBG;
147 proxyRenderer->backend->disableWIN = proxyRenderer->d.disableWIN;
148 proxyRenderer->backend->disableOBJ = proxyRenderer->d.disableOBJ;
149 if (item->address < GB_VIDEO_VERTICAL_PIXELS) {
150 proxyRenderer->backend->finishScanline(proxyRenderer->backend, item->address);
151 }
152 break;
153 case DIRTY_RANGE:
154 if (item->value < item->value2 && item->value2 <= GB_VIDEO_HORIZONTAL_PIXELS && item->address < GB_VIDEO_VERTICAL_PIXELS) {
155 proxyRenderer->backend->drawRange(proxyRenderer->backend, item->value, item->value2, item->address, proxyRenderer->objThisLine, proxyRenderer->oamMax);
156 }
157 break;
158 case DIRTY_FRAME:
159 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
160 break;
161 case DIRTY_BUFFER:
162 switch (item->address) {
163 case BUFFER_OAM:
164 proxyRenderer->oamMax = item->value2 / sizeof(struct GBObj);
165 if (proxyRenderer->oamMax > 40) {
166 proxyRenderer->oamMax = 0;
167 return false;
168 }
169 logger->readData(logger, &proxyRenderer->objThisLine, item->value2, true);
170 break;
171 case BUFFER_SGB:
172 logger->readData(logger, sgbPacket, 16, true);
173 proxyRenderer->backend->writeSGBPacket(proxyRenderer->backend, sgbPacket);
174 break;
175 }
176 break;
177 case DIRTY_FLUSH:
178 return false;
179 default:
180 return false;
181 }
182 return true;
183}
184
185static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address) {
186 struct GBVideoProxyRenderer* proxyRenderer = logger->context;
187 return (uint16_t*) &proxyRenderer->d.vram[address];
188}
189
190uint8_t GBVideoProxyRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
191 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
192
193 mVideoLoggerRendererWriteVideoRegister(proxyRenderer->logger, address, value);
194 if (!proxyRenderer->logger->block) {
195 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, address, value);
196 }
197 return value;
198}
199
200void GBVideoProxyRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
201 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
202 if (!proxyRenderer->logger->block) {
203 proxyRenderer->backend->writeSGBPacket(proxyRenderer->backend, data);
204 }
205 mVideoLoggerWriteBuffer(proxyRenderer->logger, BUFFER_SGB, 0, 16, data);
206}
207
208void GBVideoProxyRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
209 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
210 mVideoLoggerRendererWriteVRAM(proxyRenderer->logger, address);
211 if (!proxyRenderer->logger->block) {
212 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, address);
213 }
214 if (renderer->cache) {
215 mCacheSetWriteVRAM(renderer->cache, address);
216 }
217}
218
219void GBVideoProxyRendererWritePalette(struct GBVideoRenderer* renderer, int address, uint16_t value) {
220 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
221 mVideoLoggerRendererWritePalette(proxyRenderer->logger, address, value);
222 if (!proxyRenderer->logger->block) {
223 proxyRenderer->backend->writePalette(proxyRenderer->backend, address, value);
224 }
225 if (renderer->cache) {
226 mCacheSetWritePalette(renderer->cache, address, mColorFrom555(value));
227 }
228}
229
230void GBVideoProxyRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
231 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
232 if (!proxyRenderer->logger->block) {
233 proxyRenderer->backend->writeOAM(proxyRenderer->backend, oam);
234 }
235 mVideoLoggerRendererWriteOAM(proxyRenderer->logger, oam, ((uint8_t*) proxyRenderer->d.oam->raw)[oam]);
236}
237
238void GBVideoProxyRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
239 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
240 if (!proxyRenderer->logger->block) {
241 proxyRenderer->backend->disableBG = proxyRenderer->d.disableBG;
242 proxyRenderer->backend->disableWIN = proxyRenderer->d.disableWIN;
243 proxyRenderer->backend->disableOBJ = proxyRenderer->d.disableOBJ;
244 proxyRenderer->backend->drawRange(proxyRenderer->backend, startX, endX, y, obj, oamMax);
245 }
246 mVideoLoggerWriteBuffer(proxyRenderer->logger, BUFFER_OAM, 0, oamMax * sizeof(*obj), obj);
247 mVideoLoggerRendererDrawRange(proxyRenderer->logger, startX, endX, y);
248}
249
250void GBVideoProxyRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
251 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
252 if (!proxyRenderer->logger->block) {
253 proxyRenderer->backend->finishScanline(proxyRenderer->backend, y);
254 }
255 mVideoLoggerRendererDrawScanline(proxyRenderer->logger, y);
256 if (proxyRenderer->logger->block && proxyRenderer->logger->wake) {
257 proxyRenderer->logger->wake(proxyRenderer->logger, y);
258 }
259}
260
261void GBVideoProxyRendererFinishFrame(struct GBVideoRenderer* renderer) {
262 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
263 if (!proxyRenderer->logger->block) {
264 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
265 }
266 mVideoLoggerRendererFinishFrame(proxyRenderer->logger);
267 mVideoLoggerRendererFlush(proxyRenderer->logger);
268}
269
270static void GBVideoProxyRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
271 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
272 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
273 // Insert an extra item into the queue to make sure it gets flushed
274 mVideoLoggerRendererFlush(proxyRenderer->logger);
275 proxyRenderer->logger->wait(proxyRenderer->logger);
276 }
277 proxyRenderer->backend->enableSGBBorder(proxyRenderer->backend, enable);
278}
279
280static void GBVideoProxyRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
281 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
282 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
283 proxyRenderer->logger->lock(proxyRenderer->logger);
284 // Insert an extra item into the queue to make sure it gets flushed
285 mVideoLoggerRendererFlush(proxyRenderer->logger);
286 proxyRenderer->logger->postEvent(proxyRenderer->logger, LOGGER_EVENT_GET_PIXELS);
287 mVideoLoggerRendererFlush(proxyRenderer->logger);
288 proxyRenderer->logger->unlock(proxyRenderer->logger);
289 *pixels = proxyRenderer->logger->pixelBuffer;
290 *stride = proxyRenderer->logger->pixelStride;
291 } else {
292 proxyRenderer->backend->getPixels(proxyRenderer->backend, stride, pixels);
293 }
294}
295
296static void GBVideoProxyRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
297 struct GBVideoProxyRenderer* proxyRenderer = (struct GBVideoProxyRenderer*) renderer;
298 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
299 proxyRenderer->logger->lock(proxyRenderer->logger);
300 }
301 proxyRenderer->backend->putPixels(proxyRenderer->backend, stride, pixels);
302 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
303 proxyRenderer->logger->unlock(proxyRenderer->logger);
304 }
305}