src/platform/3ds/main.c (view raw)
1/* Copyright (c) 2013-2015 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
7#include "gba/renderers/video-software.h"
8#include "gba/context/context.h"
9#include "gba/gui/gui-runner.h"
10#include "gba/video.h"
11#include "util/gui.h"
12#include "util/gui/file-select.h"
13#include "util/gui/font.h"
14#include "util/gui/menu.h"
15#include "util/memory.h"
16
17#include "3ds-vfs.h"
18#include "ctr-gpu.h"
19
20#include <3ds.h>
21
22static enum ScreenMode {
23 SM_PA_BOTTOM,
24 SM_AF_BOTTOM,
25 SM_SF_BOTTOM,
26 SM_PA_TOP,
27 SM_AF_TOP,
28 SM_SF_TOP,
29 SM_MAX
30} screenMode = SM_PA_TOP;
31
32#define AUDIO_SAMPLES 0x80
33#define AUDIO_SAMPLE_BUFFER (AUDIO_SAMPLES * 24)
34
35FS_archive sdmcArchive;
36
37static struct GBA3DSRotationSource {
38 struct GBARotationSource d;
39 accelVector accel;
40 angularRate gyro;
41} rotation;
42
43static bool hasSound;
44// TODO: Move into context
45static struct GBAVideoSoftwareRenderer renderer;
46static struct GBAAVStream stream;
47static int16_t* audioLeft = 0;
48static int16_t* audioRight = 0;
49static size_t audioPos = 0;
50static struct ctrTexture gbaOutputTexture;
51static int guiDrawn;
52static int screenCleanup;
53
54enum {
55 GUI_ACTIVE = 1,
56 GUI_THIS_FRAME = 2,
57};
58
59enum {
60 SCREEN_CLEANUP_TOP_1 = 1,
61 SCREEN_CLEANUP_TOP_2 = 2,
62 SCREEN_CLEANUP_TOP = SCREEN_CLEANUP_TOP_1 | SCREEN_CLEANUP_TOP_2,
63 SCREEN_CLEANUP_BOTTOM_1 = 4,
64 SCREEN_CLEANUP_BOTTOM_2 = 8,
65 SCREEN_CLEANUP_BOTTOM = SCREEN_CLEANUP_BOTTOM_1 | SCREEN_CLEANUP_BOTTOM_2,
66};
67
68extern bool allocateRomBuffer(void);
69
70static void _postAudioBuffer(struct GBAAVStream* stream, struct GBAAudio* audio);
71
72static void _drawStart(void) {
73 ctrGpuBeginDrawing();
74 if (screenMode < SM_PA_TOP || (guiDrawn & GUI_ACTIVE)) {
75 ctrGpuBeginFrame(GFX_BOTTOM);
76 ctrSetViewportSize(320, 240);
77 } else {
78 ctrGpuBeginFrame(GFX_TOP);
79 ctrSetViewportSize(400, 240);
80 }
81 guiDrawn &= ~GUI_THIS_FRAME;
82}
83
84static void _drawEnd(void) {
85 int screen = screenMode < SM_PA_TOP ? GFX_BOTTOM : GFX_TOP;
86 u16 width = 0, height = 0;
87
88 void* outputFramebuffer = gfxGetFramebuffer(screen, GFX_LEFT, &height, &width);
89 ctrGpuEndFrame(screen, outputFramebuffer, width, height);
90
91 if (screen != GFX_BOTTOM) {
92 if (guiDrawn & (GUI_THIS_FRAME | GUI_ACTIVE)) {
93 void* outputFramebuffer = gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, &height, &width);
94 ctrGpuEndFrame(GFX_BOTTOM, outputFramebuffer, width, height);
95 } else if (screenCleanup & SCREEN_CLEANUP_BOTTOM) {
96 ctrGpuBeginFrame(GFX_BOTTOM);
97 if (screenCleanup & SCREEN_CLEANUP_BOTTOM_1) {
98 screenCleanup &= ~SCREEN_CLEANUP_BOTTOM_1;
99 } else if (screenCleanup & SCREEN_CLEANUP_BOTTOM_2) {
100 screenCleanup &= ~SCREEN_CLEANUP_BOTTOM_2;
101 }
102 void* outputFramebuffer = gfxGetFramebuffer(GFX_BOTTOM, GFX_LEFT, &height, &width);
103 ctrGpuEndFrame(GFX_BOTTOM, outputFramebuffer, width, height);
104 }
105 }
106
107 if ((screenCleanup & SCREEN_CLEANUP_TOP) && screen != GFX_TOP) {
108 ctrGpuBeginFrame(GFX_TOP);
109 if (screenCleanup & SCREEN_CLEANUP_TOP_1) {
110 screenCleanup &= ~SCREEN_CLEANUP_TOP_1;
111 } else if (screenCleanup & SCREEN_CLEANUP_TOP_2) {
112 screenCleanup &= ~SCREEN_CLEANUP_TOP_2;
113 }
114 void* outputFramebuffer = gfxGetFramebuffer(GFX_TOP, GFX_LEFT, &height, &width);
115 ctrGpuEndFrame(GFX_TOP, outputFramebuffer, width, height);
116 }
117
118 ctrGpuEndDrawing();
119}
120
121static int _batteryState(void) {
122 u8 charge;
123 u8 adapter;
124 PTMU_GetBatteryLevel(0, &charge);
125 PTMU_GetBatteryChargeState(0, &adapter);
126 int state = 0;
127 if (adapter) {
128 state |= BATTERY_CHARGING;
129 }
130 if (charge > 0) {
131 --charge;
132 }
133 return state | charge;
134}
135
136static void _guiPrepare(void) {
137 guiDrawn = GUI_ACTIVE | GUI_THIS_FRAME;
138 int screen = screenMode < SM_PA_TOP ? GFX_BOTTOM : GFX_TOP;
139 if (screen == GFX_BOTTOM) {
140 return;
141 }
142
143 ctrFlushBatch();
144 ctrGpuBeginFrame(GFX_BOTTOM);
145 ctrSetViewportSize(320, 240);
146}
147
148static void _guiFinish(void) {
149 guiDrawn &= ~GUI_ACTIVE;
150 screenCleanup |= SCREEN_CLEANUP_BOTTOM;
151}
152
153static void _setup(struct GBAGUIRunner* runner) {
154 runner->context.gba->rotationSource = &rotation.d;
155 if (hasSound) {
156 runner->context.gba->stream = &stream;
157 }
158
159 GBAVideoSoftwareRendererCreate(&renderer);
160 renderer.outputBuffer = linearMemAlign(256 * VIDEO_VERTICAL_PIXELS * 2, 0x80);
161 renderer.outputBufferStride = 256;
162 runner->context.renderer = &renderer.d;
163
164 unsigned mode;
165 if (GBAConfigGetUIntValue(&runner->context.config, "screenMode", &mode) && mode < SM_MAX) {
166 screenMode = mode;
167 }
168
169 GBAAudioResizeBuffer(&runner->context.gba->audio, AUDIO_SAMPLES);
170}
171
172static void _gameLoaded(struct GBAGUIRunner* runner) {
173 if (runner->context.gba->memory.hw.devices & HW_TILT) {
174 HIDUSER_EnableAccelerometer();
175 }
176 if (runner->context.gba->memory.hw.devices & HW_GYRO) {
177 HIDUSER_EnableGyroscope();
178 }
179
180#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
181 double ratio = GBAAudioCalculateRatio(1, 59.8260982880808, 1);
182 blip_set_rates(runner->context.gba->audio.left, GBA_ARM7TDMI_FREQUENCY, 32768 * ratio);
183 blip_set_rates(runner->context.gba->audio.right, GBA_ARM7TDMI_FREQUENCY, 32768 * ratio);
184#endif
185 if (hasSound) {
186 memset(audioLeft, 0, AUDIO_SAMPLE_BUFFER * sizeof(int16_t));
187 memset(audioRight, 0, AUDIO_SAMPLE_BUFFER * sizeof(int16_t));
188 audioPos = 0;
189 csndPlaySound(0x8, SOUND_REPEAT | SOUND_FORMAT_16BIT, 32768, 1.0, -1.0, audioLeft, audioLeft, AUDIO_SAMPLE_BUFFER * sizeof(int16_t));
190 csndPlaySound(0x9, SOUND_REPEAT | SOUND_FORMAT_16BIT, 32768, 1.0, 1.0, audioRight, audioRight, AUDIO_SAMPLE_BUFFER * sizeof(int16_t));
191 }
192 unsigned mode;
193 if (GBAConfigGetUIntValue(&runner->context.config, "screenMode", &mode) && mode != screenMode) {
194 screenMode = mode;
195 screenCleanup |= SCREEN_CLEANUP_BOTTOM | SCREEN_CLEANUP_TOP;
196 }
197}
198
199static void _gameUnloaded(struct GBAGUIRunner* runner) {
200 if (hasSound) {
201 CSND_SetPlayState(8, 0);
202 CSND_SetPlayState(9, 0);
203 csndExecCmds(false);
204 }
205
206 if (runner->context.gba->memory.hw.devices & HW_TILT) {
207 HIDUSER_DisableAccelerometer();
208 }
209 if (runner->context.gba->memory.hw.devices & HW_GYRO) {
210 HIDUSER_DisableGyroscope();
211 }
212}
213
214static void _drawTex(bool faded) {
215 u32 color = faded ? 0x3FFFFFFF : 0xFFFFFFFF;
216
217 int screen_w = screenMode < SM_PA_TOP ? 320 : 400;
218 int screen_h = 240;
219
220 int w, h;
221
222 switch (screenMode) {
223 case SM_PA_TOP:
224 case SM_PA_BOTTOM:
225 default:
226 w = VIDEO_HORIZONTAL_PIXELS;
227 h = VIDEO_VERTICAL_PIXELS;
228 break;
229 case SM_AF_TOP:
230 w = 360;
231 h = 240;
232 break;
233 case SM_AF_BOTTOM:
234 // Largest possible size with 3:2 aspect ratio and integer dimensions
235 w = 318;
236 h = 212;
237 break;
238 case SM_SF_TOP:
239 case SM_SF_BOTTOM:
240 w = screen_w;
241 h = screen_h;
242 break;
243 }
244
245 int x = (screen_w - w) / 2;
246 int y = (screen_h - h) / 2;
247
248 ctrAddRectScaled(color, x, y, w, h, 0, 0, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
249}
250
251static void _drawFrame(struct GBAGUIRunner* runner, bool faded) {
252 UNUSED(runner);
253
254 void* outputBuffer = renderer.outputBuffer;
255 struct ctrTexture* tex = &gbaOutputTexture;
256
257 GSPGPU_FlushDataCache(NULL, outputBuffer, 256 * VIDEO_VERTICAL_PIXELS * 2);
258 GX_SetDisplayTransfer(NULL,
259 outputBuffer, GX_BUFFER_DIM(256, VIDEO_VERTICAL_PIXELS),
260 tex->data, GX_BUFFER_DIM(256, 256),
261 GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGB565) |
262 GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB565) |
263 GX_TRANSFER_OUT_TILED(1) | GX_TRANSFER_FLIP_VERT(1));
264
265#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
266 if (!hasSound) {
267 blip_clear(runner->context.gba->audio.left);
268 blip_clear(runner->context.gba->audio.right);
269 }
270#endif
271
272 gspWaitForPPF();
273 ctrActivateTexture(tex);
274 _drawTex(faded);
275}
276
277static void _drawScreenshot(struct GBAGUIRunner* runner, const uint32_t* pixels, bool faded) {
278 UNUSED(runner);
279
280 struct ctrTexture* tex = &gbaOutputTexture;
281
282 u16* newPixels = linearMemAlign(256 * VIDEO_VERTICAL_PIXELS * sizeof(u32), 0x100);
283
284 // Convert image from RGBX8 to BGR565
285 for (unsigned y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
286 for (unsigned x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
287 // 0xXXBBGGRR -> 0bRRRRRGGGGGGBBBBB
288 u32 p = *pixels++;
289 newPixels[y * 256 + x] =
290 (p << 24 >> (24 + 3) << 11) | // R
291 (p << 16 >> (24 + 2) << 5) | // G
292 (p << 8 >> (24 + 3) << 0); // B
293 }
294 memset(&newPixels[y * 256 + VIDEO_HORIZONTAL_PIXELS], 0, (256 - VIDEO_HORIZONTAL_PIXELS) * sizeof(u32));
295 }
296
297 GSPGPU_FlushDataCache(NULL, (void*)newPixels, 256 * VIDEO_VERTICAL_PIXELS * sizeof(u32));
298 GX_SetDisplayTransfer(NULL,
299 (void*)newPixels, GX_BUFFER_DIM(256, VIDEO_VERTICAL_PIXELS),
300 tex->data, GX_BUFFER_DIM(256, 256),
301 GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGB565) |
302 GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB565) |
303 GX_TRANSFER_OUT_TILED(1) | GX_TRANSFER_FLIP_VERT(1));
304 gspWaitForPPF();
305 linearFree(newPixels);
306
307 ctrActivateTexture(tex);
308 _drawTex(faded);
309}
310
311static uint16_t _pollGameInput(struct GBAGUIRunner* runner) {
312 UNUSED(runner);
313
314 hidScanInput();
315 uint32_t activeKeys = hidKeysHeld() & 0xF00003FF;
316 activeKeys |= activeKeys >> 24;
317 return activeKeys;
318}
319
320static void _incrementScreenMode(struct GBAGUIRunner* runner) {
321 UNUSED(runner);
322 screenCleanup |= SCREEN_CLEANUP_TOP | SCREEN_CLEANUP_BOTTOM;
323 screenMode = (screenMode + 1) % SM_MAX;
324 GBAConfigSetUIntValue(&runner->context.config, "screenMode", screenMode);
325}
326
327static uint32_t _pollInput(void) {
328 hidScanInput();
329 uint32_t keys = 0;
330 int activeKeys = hidKeysHeld();
331 if (activeKeys & KEY_X) {
332 keys |= 1 << GUI_INPUT_CANCEL;
333 }
334 if (activeKeys & KEY_Y) {
335 keys |= 1 << GBA_GUI_INPUT_SCREEN_MODE;
336 }
337 if (activeKeys & KEY_B) {
338 keys |= 1 << GUI_INPUT_BACK;
339 }
340 if (activeKeys & KEY_A) {
341 keys |= 1 << GUI_INPUT_SELECT;
342 }
343 if (activeKeys & KEY_LEFT) {
344 keys |= 1 << GUI_INPUT_LEFT;
345 }
346 if (activeKeys & KEY_RIGHT) {
347 keys |= 1 << GUI_INPUT_RIGHT;
348 }
349 if (activeKeys & KEY_UP) {
350 keys |= 1 << GUI_INPUT_UP;
351 }
352 if (activeKeys & KEY_DOWN) {
353 keys |= 1 << GUI_INPUT_DOWN;
354 }
355 if (activeKeys & KEY_CSTICK_UP) {
356 keys |= 1 << GBA_GUI_INPUT_INCREASE_BRIGHTNESS;
357 }
358 if (activeKeys & KEY_CSTICK_DOWN) {
359 keys |= 1 << GBA_GUI_INPUT_DECREASE_BRIGHTNESS;
360 }
361 return keys;
362}
363
364static enum GUICursorState _pollCursor(int* x, int* y) {
365 hidScanInput();
366 if (!(hidKeysHeld() & KEY_TOUCH)) {
367 return GUI_CURSOR_NOT_PRESENT;
368 }
369 touchPosition pos;
370 hidTouchRead(&pos);
371 *x = pos.px;
372 *y = pos.py;
373 return GUI_CURSOR_DOWN;
374}
375
376static void _sampleRotation(struct GBARotationSource* source) {
377 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
378 // Work around ctrulib getting the entries wrong
379 rotation->accel = *(accelVector*)& hidSharedMem[0x48];
380 rotation->gyro = *(angularRate*)& hidSharedMem[0x5C];
381}
382
383static int32_t _readTiltX(struct GBARotationSource* source) {
384 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
385 return rotation->accel.x << 18L;
386}
387
388static int32_t _readTiltY(struct GBARotationSource* source) {
389 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
390 return rotation->accel.y << 18L;
391}
392
393static int32_t _readGyroZ(struct GBARotationSource* source) {
394 struct GBA3DSRotationSource* rotation = (struct GBA3DSRotationSource*) source;
395 return rotation->gyro.y << 18L; // Yes, y
396}
397
398static void _postAudioBuffer(struct GBAAVStream* stream, struct GBAAudio* audio) {
399 UNUSED(stream);
400#if RESAMPLE_LIBRARY == RESAMPLE_BLIP_BUF
401 blip_read_samples(audio->left, &audioLeft[audioPos], AUDIO_SAMPLES, false);
402 blip_read_samples(audio->right, &audioRight[audioPos], AUDIO_SAMPLES, false);
403#elif RESAMPLE_LIBRARY == RESAMPLE_NN
404 GBAAudioCopy(audio, &audioLeft[audioPos], &audioRight[audioPos], AUDIO_SAMPLES);
405#endif
406 GSPGPU_FlushDataCache(0, (void*) &audioLeft[audioPos], AUDIO_SAMPLES * sizeof(int16_t));
407 GSPGPU_FlushDataCache(0, (void*) &audioRight[audioPos], AUDIO_SAMPLES * sizeof(int16_t));
408 audioPos = (audioPos + AUDIO_SAMPLES) % AUDIO_SAMPLE_BUFFER;
409 if (audioPos == AUDIO_SAMPLES * 3) {
410 u8 playing = 0;
411 csndIsPlaying(0x8, &playing);
412 if (!playing) {
413 CSND_SetPlayState(0x8, 1);
414 CSND_SetPlayState(0x9, 1);
415 csndExecCmds(false);
416 }
417 }
418}
419
420int main() {
421 ptmInit();
422 hasSound = !csndInit();
423
424 rotation.d.sample = _sampleRotation;
425 rotation.d.readTiltX = _readTiltX;
426 rotation.d.readTiltY = _readTiltY;
427 rotation.d.readGyroZ = _readGyroZ;
428
429 stream.postVideoFrame = 0;
430 stream.postAudioFrame = 0;
431 stream.postAudioBuffer = _postAudioBuffer;
432
433 if (!allocateRomBuffer()) {
434 return 1;
435 }
436
437 if (hasSound) {
438 audioLeft = linearMemAlign(AUDIO_SAMPLE_BUFFER * sizeof(int16_t), 0x80);
439 audioRight = linearMemAlign(AUDIO_SAMPLE_BUFFER * sizeof(int16_t), 0x80);
440 }
441
442 gfxInit(GSP_BGR8_OES, GSP_BGR8_OES, false);
443
444 if (ctrInitGpu() < 0) {
445 goto cleanup;
446 }
447
448 ctrTexture_Init(&gbaOutputTexture);
449 gbaOutputTexture.format = GPU_RGB565;
450 gbaOutputTexture.filter = GPU_LINEAR;
451 gbaOutputTexture.width = 256;
452 gbaOutputTexture.height = 256;
453 gbaOutputTexture.data = vramAlloc(256 * 256 * 2);
454 void* outputTextureEnd = (u8*)gbaOutputTexture.data + 256 * 256 * 2;
455
456 // Zero texture data to make sure no garbage around the border interferes with filtering
457 GX_SetMemoryFill(NULL,
458 gbaOutputTexture.data, 0x0000, outputTextureEnd, GX_FILL_16BIT_DEPTH | GX_FILL_TRIGGER,
459 NULL, 0, NULL, 0);
460 gspWaitForPSC0();
461
462 sdmcArchive = (FS_archive) {
463 ARCH_SDMC,
464 (FS_path) { PATH_EMPTY, 1, (const u8*)"" },
465 0, 0
466 };
467 FSUSER_OpenArchive(0, &sdmcArchive);
468
469 struct GUIFont* font = GUIFontCreate();
470
471 if (!font) {
472 goto cleanup;
473 }
474
475 struct GBAGUIRunner runner = {
476 .params = {
477 320, 240,
478 font, "/",
479 _drawStart, _drawEnd,
480 _pollInput, _pollCursor,
481 _batteryState,
482 _guiPrepare, _guiFinish,
483
484 GUI_PARAMS_TRAIL
485 },
486 .configExtra = (struct GUIMenuItem[]) {
487 {
488 .title = "Screen mode",
489 .data = "screenMode",
490 .submenu = 0,
491 .state = SM_PA_TOP,
492 .validStates = (const char*[]) {
493 "Pixel-Accurate/Bottom",
494 "Aspect-Ratio Fit/Bottom",
495 "Stretched/Bottom",
496 "Pixel-Accurate/Top",
497 "Aspect-Ratio Fit/Top",
498 "Stretched/Top",
499 0
500 }
501 }
502 },
503 .nConfigExtra = 1,
504 .setup = _setup,
505 .teardown = 0,
506 .gameLoaded = _gameLoaded,
507 .gameUnloaded = _gameUnloaded,
508 .prepareForFrame = 0,
509 .drawFrame = _drawFrame,
510 .drawScreenshot = _drawScreenshot,
511 .paused = _gameUnloaded,
512 .unpaused = _gameLoaded,
513 .incrementScreenMode = _incrementScreenMode,
514 .pollGameInput = _pollGameInput
515 };
516
517 GBAGUIInit(&runner, "3ds");
518 GBAGUIRunloop(&runner);
519 GBAGUIDeinit(&runner);
520
521cleanup:
522 linearFree(renderer.outputBuffer);
523
524 ctrDeinitGpu();
525 vramFree(gbaOutputTexture.data);
526
527 gfxExit();
528
529 if (hasSound) {
530 linearFree(audioLeft);
531 linearFree(audioRight);
532 }
533 csndExit();
534 ptmExit();
535 return 0;
536}