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/tile-cache.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 bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* packet);
25static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address);
26
27void GBAVideoProxyRendererCreate(struct GBAVideoProxyRenderer* renderer, struct GBAVideoRenderer* backend) {
28 renderer->d.init = GBAVideoProxyRendererInit;
29 renderer->d.reset = GBAVideoProxyRendererReset;
30 renderer->d.deinit = GBAVideoProxyRendererDeinit;
31 renderer->d.writeVideoRegister = GBAVideoProxyRendererWriteVideoRegister;
32 renderer->d.writeVRAM = GBAVideoProxyRendererWriteVRAM;
33 renderer->d.writeOAM = GBAVideoProxyRendererWriteOAM;
34 renderer->d.writePalette = GBAVideoProxyRendererWritePalette;
35 renderer->d.drawScanline = GBAVideoProxyRendererDrawScanline;
36 renderer->d.finishFrame = GBAVideoProxyRendererFinishFrame;
37 renderer->d.getPixels = GBAVideoProxyRendererGetPixels;
38 renderer->d.putPixels = GBAVideoProxyRendererPutPixels;
39
40 renderer->d.disableBG[0] = false;
41 renderer->d.disableBG[1] = false;
42 renderer->d.disableBG[2] = false;
43 renderer->d.disableBG[3] = false;
44 renderer->d.disableOBJ = false;
45
46 renderer->logger->context = renderer;
47 renderer->logger->parsePacket = _parsePacket;
48 renderer->logger->vramBlock = _vramBlock;
49 renderer->logger->paletteSize = SIZE_PALETTE_RAM;
50 renderer->logger->vramSize = SIZE_VRAM;
51 renderer->logger->oamSize = SIZE_OAM;
52
53 renderer->backend = backend;
54}
55
56static void _init(struct GBAVideoProxyRenderer* proxyRenderer) {
57 mVideoLoggerRendererInit(proxyRenderer->logger);
58
59 if (proxyRenderer->logger->block) {
60 proxyRenderer->backend->palette = proxyRenderer->logger->palette;
61 proxyRenderer->backend->vram = proxyRenderer->logger->vram;
62 proxyRenderer->backend->oam = (union GBAOAM*) proxyRenderer->logger->oam;
63 proxyRenderer->backend->cache = NULL;
64 }
65}
66
67static void _reset(struct GBAVideoProxyRenderer* proxyRenderer) {
68 memcpy(proxyRenderer->logger->oam, &proxyRenderer->d.oam->raw, SIZE_OAM);
69 memcpy(proxyRenderer->logger->palette, proxyRenderer->d.palette, SIZE_PALETTE_RAM);
70 memcpy(proxyRenderer->logger->vram, proxyRenderer->d.vram, SIZE_VRAM);
71
72 mVideoLoggerRendererReset(proxyRenderer->logger);
73}
74
75void GBAVideoProxyRendererShim(struct GBAVideo* video, struct GBAVideoProxyRenderer* renderer) {
76 if ((renderer->backend && video->renderer != renderer->backend) || video->renderer == &renderer->d) {
77 return;
78 }
79 renderer->backend = video->renderer;
80 video->renderer = &renderer->d;
81 renderer->d.cache = renderer->backend->cache;
82 renderer->d.palette = video->palette;
83 renderer->d.vram = video->vram;
84 renderer->d.oam = &video->oam;
85 _init(renderer);
86 _reset(renderer);
87}
88
89void GBAVideoProxyRendererUnshim(struct GBAVideo* video, struct GBAVideoProxyRenderer* renderer) {
90 if (video->renderer != &renderer->d) {
91 return;
92 }
93 renderer->backend->cache = video->renderer->cache;
94 video->renderer = renderer->backend;
95 renderer->backend->palette = video->palette;
96 renderer->backend->vram = video->vram;
97 renderer->backend->oam = &video->oam;
98
99 mVideoLoggerRendererDeinit(renderer->logger);
100}
101
102void GBAVideoProxyRendererInit(struct GBAVideoRenderer* renderer) {
103 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
104
105 _init(proxyRenderer);
106
107 proxyRenderer->backend->init(proxyRenderer->backend);
108}
109
110void GBAVideoProxyRendererReset(struct GBAVideoRenderer* renderer) {
111 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
112
113 _reset(proxyRenderer);
114
115 proxyRenderer->backend->reset(proxyRenderer->backend);
116}
117
118void GBAVideoProxyRendererDeinit(struct GBAVideoRenderer* renderer) {
119 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
120
121 proxyRenderer->backend->deinit(proxyRenderer->backend);
122
123 mVideoLoggerRendererDeinit(proxyRenderer->logger);
124}
125
126static bool _parsePacket(struct mVideoLogger* logger, const struct mVideoLoggerDirtyInfo* item) {
127 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
128 switch (item->type) {
129 case DIRTY_REGISTER:
130 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, item->address, item->value);
131 break;
132 case DIRTY_PALETTE:
133 if (item->address < SIZE_PALETTE_RAM) {
134 logger->palette[item->address >> 1] = item->value;
135 proxyRenderer->backend->writePalette(proxyRenderer->backend, item->address, item->value);
136 }
137 break;
138 case DIRTY_OAM:
139 if (item->address < SIZE_PALETTE_RAM) {
140 logger->oam[item->address] = item->value;
141 proxyRenderer->backend->writeOAM(proxyRenderer->backend, item->address);
142 }
143 break;
144 case DIRTY_VRAM:
145 if (item->address <= SIZE_VRAM - 0x1000) {
146 logger->readData(logger, &logger->vram[item->address >> 1], 0x1000, true);
147 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, item->address);
148 }
149 break;
150 case DIRTY_SCANLINE:
151 if (item->address < VIDEO_VERTICAL_PIXELS) {
152 proxyRenderer->backend->drawScanline(proxyRenderer->backend, item->address);
153 }
154 break;
155 case DIRTY_FRAME:
156 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
157 break;
158 case DIRTY_FLUSH:
159 return false;
160 default:
161 return false;
162 }
163 return true;
164}
165
166static uint16_t* _vramBlock(struct mVideoLogger* logger, uint32_t address) {
167 struct GBAVideoProxyRenderer* proxyRenderer = logger->context;
168 return &proxyRenderer->d.vram[address >> 1];
169}
170
171uint16_t GBAVideoProxyRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
172 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
173 switch (address) {
174 case REG_BG0CNT:
175 case REG_BG1CNT:
176 case REG_BG2CNT:
177 case REG_BG3CNT:
178 value &= 0xFFCF;
179 break;
180 case REG_BG0HOFS:
181 case REG_BG0VOFS:
182 case REG_BG1HOFS:
183 case REG_BG1VOFS:
184 case REG_BG2HOFS:
185 case REG_BG2VOFS:
186 case REG_BG3HOFS:
187 case REG_BG3VOFS:
188 value &= 0x01FF;
189 break;
190 }
191 if (address > REG_BLDY) {
192 return value;
193 }
194
195 mVideoLoggerRendererWriteVideoRegister(proxyRenderer->logger, address, value);
196 if (!proxyRenderer->logger->block) {
197 proxyRenderer->backend->writeVideoRegister(proxyRenderer->backend, address, value);
198 }
199 return value;
200}
201
202void GBAVideoProxyRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
203 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
204 mVideoLoggerRendererWriteVRAM(proxyRenderer->logger, address);
205 if (!proxyRenderer->logger->block) {
206 proxyRenderer->backend->writeVRAM(proxyRenderer->backend, address);
207 }
208 if (renderer->cache) {
209 mTileCacheWriteVRAM(renderer->cache, address);
210 }
211}
212
213void GBAVideoProxyRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
214 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
215 mVideoLoggerRendererWritePalette(proxyRenderer->logger, address, value);
216 if (!proxyRenderer->logger->block) {
217 proxyRenderer->backend->writePalette(proxyRenderer->backend, address, value);
218 }
219 if (renderer->cache) {
220 mTileCacheWritePalette(renderer->cache, address);
221 }
222}
223
224void GBAVideoProxyRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
225 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
226 if (!proxyRenderer->logger->block) {
227 proxyRenderer->backend->writeOAM(proxyRenderer->backend, oam);
228 }
229 mVideoLoggerRendererWriteOAM(proxyRenderer->logger, oam, proxyRenderer->d.oam->raw[oam]);
230}
231
232void GBAVideoProxyRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
233 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
234 if (!proxyRenderer->logger->block) {
235 proxyRenderer->backend->drawScanline(proxyRenderer->backend, y);
236 }
237 mVideoLoggerRendererDrawScanline(proxyRenderer->logger, y);
238 if (proxyRenderer->logger->block && proxyRenderer->logger->wake) {
239 proxyRenderer->logger->wake(proxyRenderer->logger, y);
240 }
241}
242
243void GBAVideoProxyRendererFinishFrame(struct GBAVideoRenderer* renderer) {
244 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
245 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
246 proxyRenderer->logger->lock(proxyRenderer->logger);
247 proxyRenderer->logger->wait(proxyRenderer->logger);
248 }
249 proxyRenderer->backend->finishFrame(proxyRenderer->backend);
250 mVideoLoggerRendererFinishFrame(proxyRenderer->logger);
251 mVideoLoggerRendererFlush(proxyRenderer->logger);
252 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
253 proxyRenderer->logger->unlock(proxyRenderer->logger);
254 }
255}
256
257static void GBAVideoProxyRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
258 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
259 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
260 proxyRenderer->logger->lock(proxyRenderer->logger);
261 // Insert an extra item into the queue to make sure it gets flushed
262 mVideoLoggerRendererFlush(proxyRenderer->logger);
263 proxyRenderer->logger->wait(proxyRenderer->logger);
264 }
265 proxyRenderer->backend->getPixels(proxyRenderer->backend, stride, pixels);
266 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
267 proxyRenderer->logger->unlock(proxyRenderer->logger);
268 }
269}
270
271static void GBAVideoProxyRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
272 struct GBAVideoProxyRenderer* proxyRenderer = (struct GBAVideoProxyRenderer*) renderer;
273 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
274 proxyRenderer->logger->lock(proxyRenderer->logger);
275 // Insert an extra item into the queue to make sure it gets flushed
276 mVideoLoggerRendererFlush(proxyRenderer->logger);
277 proxyRenderer->logger->wait(proxyRenderer->logger);
278 }
279 proxyRenderer->backend->putPixels(proxyRenderer->backend, stride, pixels);
280 if (proxyRenderer->logger->block && proxyRenderer->logger->wait) {
281 proxyRenderer->logger->unlock(proxyRenderer->logger);
282 }
283}