src/gba/renderers/video-software.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#include "gba/renderers/software-private.h"
7
8#include <mgba/core/tile-cache.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11
12#include <mgba-util/arm-algo.h>
13#include <mgba-util/memory.h>
14
15static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
16static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
18static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
19static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
20static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
21static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
22static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
23static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
24static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
25static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
26
27static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
28static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
29static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
38
39static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
40
41static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
42
43static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
44static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
45
46void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
47 renderer->d.init = GBAVideoSoftwareRendererInit;
48 renderer->d.reset = GBAVideoSoftwareRendererReset;
49 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
50 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
51 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
52 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
53 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
54 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
55 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
56 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
57 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
58
59 renderer->d.disableBG[0] = false;
60 renderer->d.disableBG[1] = false;
61 renderer->d.disableBG[2] = false;
62 renderer->d.disableBG[3] = false;
63 renderer->d.disableOBJ = false;
64 renderer->tileStride = 0x20;
65 renderer->combinedObjSort = false;
66 renderer->masterEnd = VIDEO_HORIZONTAL_PIXELS;
67 renderer->masterHeight = VIDEO_VERTICAL_PIXELS;
68 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
69
70 renderer->temporaryBuffer = 0;
71}
72
73static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
74 GBAVideoSoftwareRendererReset(renderer);
75
76 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
77
78 int y;
79 for (y = 0; y < softwareRenderer->masterHeight; ++y) {
80 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
81 int x;
82 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
83 row[x] = GBA_COLOR_WHITE;
84 }
85 }
86}
87
88static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
89 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
90 int i;
91
92 softwareRenderer->dispcnt = 0x0080;
93
94 softwareRenderer->target1Obj = 0;
95 softwareRenderer->target1Bd = 0;
96 softwareRenderer->target2Obj = 0;
97 softwareRenderer->target2Bd = 0;
98 softwareRenderer->blendEffect = BLEND_NONE;
99 softwareRenderer->masterBright = 0;
100 softwareRenderer->masterBrightY = 0;
101 for (i = 0; i < 1024; i += 2) {
102 uint16_t entry;
103 LOAD_16(entry, i, softwareRenderer->d.palette);
104 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
105 }
106 softwareRenderer->objExtPalette = NULL;
107 softwareRenderer->objExtVariantPalette = NULL;
108 softwareRenderer->blendDirty = false;
109 _updatePalettes(softwareRenderer);
110
111 softwareRenderer->blda = 0;
112 softwareRenderer->bldb = 0;
113 softwareRenderer->bldy = 0;
114
115 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
116 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
117 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
118 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
119 softwareRenderer->oamMax = 0;
120
121 softwareRenderer->mosaic = 0;
122
123 for (i = 0; i < 4; ++i) {
124 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
125 bg->index = i;
126 bg->enabled = 0;
127 bg->priority = 0;
128 bg->charBase = 0;
129 bg->mosaic = 0;
130 bg->multipalette = 0;
131 bg->screenBase = 0;
132 bg->overflow = 0;
133 bg->size = 0;
134 bg->target1 = 0;
135 bg->target2 = 0;
136 bg->x = 0;
137 bg->y = 0;
138 bg->refx = 0;
139 bg->refy = 0;
140 bg->dx = 256;
141 bg->dmx = 0;
142 bg->dy = 0;
143 bg->dmy = 256;
144 bg->sx = 0;
145 bg->sy = 0;
146 bg->extPalette = NULL;
147 bg->variantPalette = NULL;
148 }
149}
150
151static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
152 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
153 UNUSED(softwareRenderer);
154}
155
156static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
157 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
158 switch (address) {
159 case REG_DISPCNT:
160 softwareRenderer->dispcnt = value;
161 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
162 break;
163 case REG_BG0CNT:
164 value &= 0xDFFF;
165 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
166 break;
167 case REG_BG1CNT:
168 value &= 0xDFFF;
169 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
170 break;
171 case REG_BG2CNT:
172 value &= 0xFFFF;
173 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
174 break;
175 case REG_BG3CNT:
176 value &= 0xFFFF;
177 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
178 break;
179 case REG_BG0HOFS:
180 value &= 0x01FF;
181 softwareRenderer->bg[0].x = value;
182 break;
183 case REG_BG0VOFS:
184 value &= 0x01FF;
185 softwareRenderer->bg[0].y = value;
186 break;
187 case REG_BG1HOFS:
188 value &= 0x01FF;
189 softwareRenderer->bg[1].x = value;
190 break;
191 case REG_BG1VOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[1].y = value;
194 break;
195 case REG_BG2HOFS:
196 value &= 0x01FF;
197 softwareRenderer->bg[2].x = value;
198 break;
199 case REG_BG2VOFS:
200 value &= 0x01FF;
201 softwareRenderer->bg[2].y = value;
202 break;
203 case REG_BG3HOFS:
204 value &= 0x01FF;
205 softwareRenderer->bg[3].x = value;
206 break;
207 case REG_BG3VOFS:
208 value &= 0x01FF;
209 softwareRenderer->bg[3].y = value;
210 break;
211 case REG_BG2PA:
212 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
213 break;
214 case REG_BG2PB:
215 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
216 break;
217 case REG_BG2PC:
218 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
219 break;
220 case REG_BG2PD:
221 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
222 break;
223 case REG_BG2X_LO:
224 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
225 break;
226 case REG_BG2X_HI:
227 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
228 break;
229 case REG_BG2Y_LO:
230 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
231 break;
232 case REG_BG2Y_HI:
233 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
234 break;
235 case REG_BG3PA:
236 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
237 break;
238 case REG_BG3PB:
239 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
240 break;
241 case REG_BG3PC:
242 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
243 break;
244 case REG_BG3PD:
245 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
246 break;
247 case REG_BG3X_LO:
248 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
249 break;
250 case REG_BG3X_HI:
251 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
252 break;
253 case REG_BG3Y_LO:
254 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
255 break;
256 case REG_BG3Y_HI:
257 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
258 break;
259 case REG_BLDCNT:
260 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
261 value &= 0x3FFF;
262 break;
263 case REG_BLDALPHA:
264 softwareRenderer->blda = value & 0x1F;
265 if (softwareRenderer->blda > 0x10) {
266 softwareRenderer->blda = 0x10;
267 }
268 softwareRenderer->bldb = (value >> 8) & 0x1F;
269 if (softwareRenderer->bldb > 0x10) {
270 softwareRenderer->bldb = 0x10;
271 }
272 softwareRenderer->blendDirty = true;
273 value &= 0x1F1F;
274 break;
275 case REG_BLDY:
276 value &= 0x1F;
277 if (value > 0x10) {
278 value = 0x10;
279 }
280 if (softwareRenderer->bldy != value) {
281 softwareRenderer->bldy = value;
282 softwareRenderer->blendDirty = true;
283 }
284 break;
285 case REG_WIN0H:
286 softwareRenderer->winN[0].h.end = value & 0xFF;
287 softwareRenderer->winN[0].h.start = value >> 8;
288 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
289 softwareRenderer->winN[0].h.start = 0;
290 }
291 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
292 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
293 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
294 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
295 }
296 }
297 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
298 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
299 }
300 break;
301 case REG_WIN1H:
302 softwareRenderer->winN[1].h.end = value & 0xFF;
303 softwareRenderer->winN[1].h.start = value >> 8;
304 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
305 softwareRenderer->winN[1].h.start = 0;
306 }
307 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
308 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
309 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
310 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
311 }
312 }
313 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
314 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
315 }
316 break;
317 case REG_WIN0V:
318 softwareRenderer->winN[0].v.end = value & 0xFF;
319 softwareRenderer->winN[0].v.start = value >> 8;
320 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
321 softwareRenderer->winN[0].v.start = 0;
322 }
323 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
324 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
325 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
326 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
327 }
328 }
329 break;
330 case REG_WIN1V:
331 softwareRenderer->winN[1].v.end = value & 0xFF;
332 softwareRenderer->winN[1].v.start = value >> 8;
333 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
334 softwareRenderer->winN[1].v.start = 0;
335 }
336 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
337 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
338 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
339 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
340 }
341 }
342 break;
343 case REG_WININ:
344 value &= 0x3F3F;
345 softwareRenderer->winN[0].control.packed = value;
346 softwareRenderer->winN[1].control.packed = value >> 8;
347 break;
348 case REG_WINOUT:
349 value &= 0x3F3F;
350 softwareRenderer->winout.packed = value;
351 softwareRenderer->objwin.packed = value >> 8;
352 break;
353 case REG_MOSAIC:
354 softwareRenderer->mosaic = value;
355 break;
356 case REG_GREENSWP:
357 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
358 break;
359 default:
360 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
361 }
362 return value;
363}
364
365static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
366 if (renderer->cache) {
367 mTileCacheWriteVRAM(renderer->cache, address);
368 }
369}
370
371static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
372 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
373 softwareRenderer->oamDirty = 1;
374 UNUSED(oam);
375}
376
377static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
378 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
379#ifdef COLOR_16_BIT
380#ifdef COLOR_5_6_5
381 unsigned color = 0;
382 color |= (value & 0x001F) << 11;
383 color |= (value & 0x03E0) << 1;
384 color |= (value & 0x7C00) >> 10;
385#else
386 unsigned color = value;
387#endif
388#else
389 unsigned color = 0;
390 color |= (value << 3) & 0xF8;
391 color |= (value << 6) & 0xF800;
392 color |= (value << 9) & 0xF80000;
393 color |= (color >> 5) & 0x070707;
394#endif
395 softwareRenderer->normalPalette[address >> 1] = color;
396 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
397 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
398 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
399 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
400 }
401 if (renderer->cache) {
402 mTileCacheWritePalette(renderer->cache, address);
403 }
404}
405
406static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
407 if (win->v.end >= win->v.start) {
408 if (y >= win->v.end) {
409 return;
410 }
411 if (y < win->v.start) {
412 return;
413 }
414 } else if (y >= win->v.end && y < win->v.start) {
415 return;
416 }
417 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
418 struct WindowN splits[2] = { *win, *win };
419 splits[0].h.start = 0;
420 splits[1].h.end = softwareRenderer->masterEnd;
421 _breakWindowInner(softwareRenderer, &splits[0]);
422 _breakWindowInner(softwareRenderer, &splits[1]);
423 } else {
424 _breakWindowInner(softwareRenderer, win);
425 }
426}
427
428static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
429 int activeWindow;
430 int startX = 0;
431 if (win->h.end > 0) {
432 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
433 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
434 // Insert a window before the end of the active window
435 struct Window oldWindow = softwareRenderer->windows[activeWindow];
436 if (win->h.start > startX) {
437 // And after the start of the active window
438 int nextWindow = softwareRenderer->nWindows;
439 ++softwareRenderer->nWindows;
440 for (; nextWindow > activeWindow; --nextWindow) {
441 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
442 }
443 softwareRenderer->windows[activeWindow].endX = win->h.start;
444 ++activeWindow;
445 }
446 softwareRenderer->windows[activeWindow].control = win->control;
447 softwareRenderer->windows[activeWindow].endX = win->h.end;
448 if (win->h.end >= oldWindow.endX) {
449 // Trim off extra windows we've overwritten
450 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
451 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
452 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
453 return;
454 }
455 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
456 --softwareRenderer->nWindows;
457 }
458 } else {
459 ++activeWindow;
460 int nextWindow = softwareRenderer->nWindows;
461 ++softwareRenderer->nWindows;
462 for (; nextWindow > activeWindow; --nextWindow) {
463 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
464 }
465 softwareRenderer->windows[activeWindow] = oldWindow;
466 }
467 break;
468 }
469 startX = softwareRenderer->windows[activeWindow].endX;
470 }
471 }
472#ifdef DEBUG
473 if (softwareRenderer->nWindows > MAX_WINDOW) {
474 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
475 }
476#endif
477}
478
479static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
480 int i;
481 int p;
482 int oamMax = 0;
483 int maxP = 1;
484 if (renderer->combinedObjSort) {
485 maxP = 4;
486 }
487 for (p = 0; p < maxP; ++p) {
488 for (i = 0; i < 128; ++i) {
489 struct GBAObj obj;
490 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
491 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
492 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
493 if (renderer->combinedObjSort && GBAObjAttributesCGetPriority(obj.c) != p) {
494 continue;
495 }
496 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
497 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
498 if (GBAObjAttributesAIsTransformed(obj.a)) {
499 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
500 }
501 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= 256) {
502 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
503 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
504 renderer->sprites[oamMax].obj = obj;
505 ++oamMax;
506 }
507 }
508 }
509 }
510 renderer->oamMax = oamMax;
511 renderer->oamDirty = 0;
512}
513
514static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
515 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
516
517 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
518 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
519 int x;
520 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
521 row[x] = GBA_COLOR_WHITE;
522 }
523 return;
524 }
525
526 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
527 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
528 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
529 }
530
531 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
532 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
533 softwareRenderer->d.vramOBJ[0] = objVramBase;
534
535 int w;
536 unsigned priority;
537 for (priority = 0; priority < 4; ++priority) {
538 softwareRenderer->end = 0;
539 for (w = 0; w < softwareRenderer->nWindows; ++w) {
540 softwareRenderer->start = softwareRenderer->end;
541 softwareRenderer->end = softwareRenderer->windows[w].endX;
542 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
543 if (spriteLayers & (1 << priority)) {
544 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
545 }
546 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
547 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
548 }
549 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
550 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
551 }
552 if (TEST_LAYER_ENABLED(2)) {
553 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
554 case 0:
555 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
556 break;
557 case 1:
558 case 2:
559 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
560 break;
561 case 3:
562 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
563 break;
564 case 4:
565 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
566 break;
567 case 5:
568 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
569 break;
570 }
571 }
572 if (TEST_LAYER_ENABLED(3)) {
573 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
574 case 0:
575 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
576 break;
577 case 2:
578 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
579 break;
580 }
581 }
582 }
583 }
584 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
585 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
586 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
587 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
588
589 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
590
591#ifdef COLOR_16_BIT
592#if defined(__ARM_NEON) && !defined(__APPLE__)
593 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
594#else
595 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
596 row[x] = softwareRenderer->row[x];
597 }
598#endif
599#else
600 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
601#endif
602}
603
604static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
605 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
606
607 if (softwareRenderer->temporaryBuffer) {
608 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
609 softwareRenderer->temporaryBuffer = 0;
610 }
611 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
612 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
613 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
614 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
615}
616
617static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
618 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
619 *stride = softwareRenderer->outputBufferStride;
620 *pixels = softwareRenderer->outputBuffer;
621}
622
623static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
624 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
625
626 const color_t* colorPixels = pixels;
627 int i;
628 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
629 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
630 }
631}
632
633static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
634 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
635 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
636 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
637 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
638}
639
640static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
641 UNUSED(renderer);
642 bg->priority = GBARegisterBGCNTGetPriority(value);
643 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
644 bg->charBase &= 0xC000;
645 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
646 bg->multipalette = GBARegisterBGCNTGet256Color(value);
647 bg->screenBase &= ~0xF800;
648 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
649 bg->overflow = GBARegisterBGCNTGetOverflow(value);
650 bg->size = GBARegisterBGCNTGetSize(value);
651 bg->control = value;
652}
653
654static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
655 bg->dx = value;
656}
657
658static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
659 bg->dmx = value;
660}
661
662static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
663 bg->dy = value;
664}
665
666static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
667 bg->dmy = value;
668}
669
670static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
671 bg->refx = (bg->refx & 0xFFFF0000) | value;
672 bg->sx = bg->refx;
673}
674
675static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
676 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
677 bg->refx <<= 4;
678 bg->refx >>= 4;
679 bg->sx = bg->refx;
680}
681
682static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
683 bg->refy = (bg->refy & 0xFFFF0000) | value;
684 bg->sy = bg->refy;
685}
686
687static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
688 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
689 bg->refy <<= 4;
690 bg->refy >>= 4;
691 bg->sy = bg->refy;
692}
693
694static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
695 enum BlendEffect oldEffect = renderer->blendEffect;
696
697 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
698 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
699 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
700 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
701 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
702 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
703 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
704 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
705
706 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
707 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
708 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
709 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
710 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
711
712 if (oldEffect != renderer->blendEffect) {
713 renderer->blendDirty = true;
714 }
715}
716
717void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
718 int x;
719 int masterEnd = softwareRenderer->masterEnd;
720 for (x = 0; x < masterEnd; x += 4) {
721 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
722 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
723 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
724 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
725 }
726
727 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
728 softwareRenderer->nWindows = 1;
729 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
730 softwareRenderer->windows[0].control = softwareRenderer->winout;
731 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
732 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
733 }
734 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
735 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
736 }
737 } else {
738 softwareRenderer->windows[0].control.packed = 0xFF;
739 }
740
741 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
742
743 int w;
744 x = 0;
745 for (w = 0; w < softwareRenderer->nWindows; ++w) {
746 // TOOD: handle objwin on backdrop
747 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
748 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
749 backdrop |= softwareRenderer->normalPalette[0];
750 } else {
751 backdrop |= softwareRenderer->variantPalette[0];
752 }
753 int end = softwareRenderer->windows[w].endX;
754 for (; x & 3; ++x) {
755 softwareRenderer->row[x] = backdrop;
756 }
757 for (; x < end - 3; x += 4) {
758 softwareRenderer->row[x] = backdrop;
759 softwareRenderer->row[x + 1] = backdrop;
760 softwareRenderer->row[x + 2] = backdrop;
761 softwareRenderer->row[x + 3] = backdrop;
762 }
763 for (; x < end; ++x) {
764 softwareRenderer->row[x] = backdrop;
765 }
766 }
767
768 if (softwareRenderer->blendDirty) {
769 _updatePalettes(softwareRenderer);
770 softwareRenderer->blendDirty = false;
771 }
772}
773
774void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
775 int x, w;
776 if (softwareRenderer->target2Bd) {
777 x = 0;
778 for (w = 0; w < softwareRenderer->nWindows; ++w) {
779 uint32_t backdrop = 0;
780 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
781 backdrop |= softwareRenderer->normalPalette[0];
782 } else {
783 backdrop |= softwareRenderer->variantPalette[0];
784 }
785 int end = softwareRenderer->windows[w].endX;
786 for (; x < end; ++x) {
787 uint32_t color = softwareRenderer->row[x];
788 if (color & FLAG_TARGET_1) {
789 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
790 }
791 }
792 }
793 }
794 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
795 x = 0;
796 for (w = 0; w < softwareRenderer->nWindows; ++w) {
797 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
798 continue;
799 }
800 int end = softwareRenderer->windows[w].endX;
801 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
802 for (; x < end; ++x) {
803 uint32_t color = softwareRenderer->row[x];
804 if ((color & 0xFF000000) == FLAG_REBLEND) {
805 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
806 }
807 }
808 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
809 for (; x < end; ++x) {
810 uint32_t color = softwareRenderer->row[x];
811 if ((color & 0xFF000000) == FLAG_REBLEND) {
812 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
813 }
814 }
815 }
816 }
817 }
818}
819
820int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
821 int w;
822 renderer->end = 0;
823 int spriteLayers = 0;
824 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
825 if (renderer->oamDirty) {
826 _cleanOAM(renderer);
827 }
828 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
829 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
830 int mosaicY = y - (y % mosaicV);
831 for (w = 0; w < renderer->nWindows; ++w) {
832 renderer->start = renderer->end;
833 renderer->end = renderer->windows[w].endX;
834 renderer->currentWindow = renderer->windows[w].control;
835 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
836 continue;
837 }
838 int i;
839 int drawn;
840
841 for (i = 0; i < renderer->oamMax; ++i) {
842 int localY = y;
843 if (renderer->spriteCyclesRemaining <= 0) {
844 break;
845 }
846 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
847 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
848 localY = mosaicY;
849 }
850 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
851 continue;
852 }
853 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
854 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
855 }
856 }
857 }
858 return spriteLayers;
859}
860
861static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
862 int i;
863 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
864 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
865 if (renderer->blendEffect == BLEND_BRIGHTEN) {
866 for (i = 0; i < 512; ++i) {
867 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
868 }
869 } else if (renderer->blendEffect == BLEND_DARKEN) {
870 for (i = 0; i < 512; ++i) {
871 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
872 }
873 } else {
874 for (i = 0; i < 512; ++i) {
875 renderer->variantPalette[i] = renderer->normalPalette[i];
876 }
877 }
878}