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->bitmapStride = 0;
66 renderer->combinedObjSort = false;
67 renderer->masterEnd = VIDEO_HORIZONTAL_PIXELS;
68 renderer->masterHeight = VIDEO_VERTICAL_PIXELS;
69 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
70
71 renderer->temporaryBuffer = 0;
72}
73
74static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
75 GBAVideoSoftwareRendererReset(renderer);
76
77 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
78
79 int y;
80 for (y = 0; y < softwareRenderer->masterHeight; ++y) {
81 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
82 int x;
83 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
84 row[x] = GBA_COLOR_WHITE;
85 }
86 }
87}
88
89static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
90 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
91 int i;
92
93 softwareRenderer->dispcnt = 0x0080;
94
95 softwareRenderer->target1Obj = 0;
96 softwareRenderer->target1Bd = 0;
97 softwareRenderer->target2Obj = 0;
98 softwareRenderer->target2Bd = 0;
99 softwareRenderer->blendEffect = BLEND_NONE;
100 softwareRenderer->masterBright = 0;
101 softwareRenderer->masterBrightY = 0;
102 for (i = 0; i < 1024; i += 2) {
103 uint16_t entry;
104 LOAD_16(entry, i, softwareRenderer->d.palette);
105 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
106 }
107 softwareRenderer->objExtPalette = NULL;
108 softwareRenderer->objExtVariantPalette = NULL;
109 softwareRenderer->blendDirty = false;
110 _updatePalettes(softwareRenderer);
111
112 softwareRenderer->blda = 0;
113 softwareRenderer->bldb = 0;
114 softwareRenderer->bldy = 0;
115
116 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
117 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
118 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
119 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
120 softwareRenderer->oamMax = 0;
121
122 softwareRenderer->mosaic = 0;
123
124 for (i = 0; i < 4; ++i) {
125 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
126 bg->index = i;
127 bg->enabled = 0;
128 bg->priority = 0;
129 bg->charBase = 0;
130 bg->mosaic = 0;
131 bg->multipalette = 0;
132 bg->screenBase = 0;
133 bg->overflow = 0;
134 bg->size = 0;
135 bg->target1 = 0;
136 bg->target2 = 0;
137 bg->x = 0;
138 bg->y = 0;
139 bg->refx = 0;
140 bg->refy = 0;
141 bg->dx = 256;
142 bg->dmx = 0;
143 bg->dy = 0;
144 bg->dmy = 256;
145 bg->sx = 0;
146 bg->sy = 0;
147 bg->extPalette = NULL;
148 bg->variantPalette = NULL;
149 }
150}
151
152static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
153 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
154 UNUSED(softwareRenderer);
155}
156
157static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
158 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
159 switch (address) {
160 case REG_DISPCNT:
161 softwareRenderer->dispcnt = value;
162 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
163 break;
164 case REG_BG0CNT:
165 value &= 0xDFFF;
166 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
167 break;
168 case REG_BG1CNT:
169 value &= 0xDFFF;
170 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
171 break;
172 case REG_BG2CNT:
173 value &= 0xFFFF;
174 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
175 break;
176 case REG_BG3CNT:
177 value &= 0xFFFF;
178 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
179 break;
180 case REG_BG0HOFS:
181 value &= 0x01FF;
182 softwareRenderer->bg[0].x = value;
183 break;
184 case REG_BG0VOFS:
185 value &= 0x01FF;
186 softwareRenderer->bg[0].y = value;
187 break;
188 case REG_BG1HOFS:
189 value &= 0x01FF;
190 softwareRenderer->bg[1].x = value;
191 break;
192 case REG_BG1VOFS:
193 value &= 0x01FF;
194 softwareRenderer->bg[1].y = value;
195 break;
196 case REG_BG2HOFS:
197 value &= 0x01FF;
198 softwareRenderer->bg[2].x = value;
199 break;
200 case REG_BG2VOFS:
201 value &= 0x01FF;
202 softwareRenderer->bg[2].y = value;
203 break;
204 case REG_BG3HOFS:
205 value &= 0x01FF;
206 softwareRenderer->bg[3].x = value;
207 break;
208 case REG_BG3VOFS:
209 value &= 0x01FF;
210 softwareRenderer->bg[3].y = value;
211 break;
212 case REG_BG2PA:
213 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
214 break;
215 case REG_BG2PB:
216 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
217 break;
218 case REG_BG2PC:
219 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
220 break;
221 case REG_BG2PD:
222 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
223 break;
224 case REG_BG2X_LO:
225 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
226 break;
227 case REG_BG2X_HI:
228 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
229 break;
230 case REG_BG2Y_LO:
231 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
232 break;
233 case REG_BG2Y_HI:
234 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
235 break;
236 case REG_BG3PA:
237 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
238 break;
239 case REG_BG3PB:
240 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
241 break;
242 case REG_BG3PC:
243 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
244 break;
245 case REG_BG3PD:
246 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
247 break;
248 case REG_BG3X_LO:
249 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
250 break;
251 case REG_BG3X_HI:
252 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
253 break;
254 case REG_BG3Y_LO:
255 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
256 break;
257 case REG_BG3Y_HI:
258 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
259 break;
260 case REG_BLDCNT:
261 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
262 value &= 0x3FFF;
263 break;
264 case REG_BLDALPHA:
265 softwareRenderer->blda = value & 0x1F;
266 if (softwareRenderer->blda > 0x10) {
267 softwareRenderer->blda = 0x10;
268 }
269 softwareRenderer->bldb = (value >> 8) & 0x1F;
270 if (softwareRenderer->bldb > 0x10) {
271 softwareRenderer->bldb = 0x10;
272 }
273 softwareRenderer->blendDirty = true;
274 value &= 0x1F1F;
275 break;
276 case REG_BLDY:
277 value &= 0x1F;
278 if (value > 0x10) {
279 value = 0x10;
280 }
281 if (softwareRenderer->bldy != value) {
282 softwareRenderer->bldy = value;
283 softwareRenderer->blendDirty = true;
284 }
285 break;
286 case REG_WIN0H:
287 softwareRenderer->winN[0].h.end = value & 0xFF;
288 softwareRenderer->winN[0].h.start = value >> 8;
289 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
290 softwareRenderer->winN[0].h.start = 0;
291 }
292 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
293 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
294 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
295 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
296 }
297 }
298 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
299 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
300 }
301 break;
302 case REG_WIN1H:
303 softwareRenderer->winN[1].h.end = value & 0xFF;
304 softwareRenderer->winN[1].h.start = value >> 8;
305 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
306 softwareRenderer->winN[1].h.start = 0;
307 }
308 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
309 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
310 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
311 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
312 }
313 }
314 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
315 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
316 }
317 break;
318 case REG_WIN0V:
319 softwareRenderer->winN[0].v.end = value & 0xFF;
320 softwareRenderer->winN[0].v.start = value >> 8;
321 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
322 softwareRenderer->winN[0].v.start = 0;
323 }
324 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
325 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
326 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
327 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
328 }
329 }
330 break;
331 case REG_WIN1V:
332 softwareRenderer->winN[1].v.end = value & 0xFF;
333 softwareRenderer->winN[1].v.start = value >> 8;
334 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
335 softwareRenderer->winN[1].v.start = 0;
336 }
337 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
338 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
339 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
340 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
341 }
342 }
343 break;
344 case REG_WININ:
345 value &= 0x3F3F;
346 softwareRenderer->winN[0].control.packed = value;
347 softwareRenderer->winN[1].control.packed = value >> 8;
348 break;
349 case REG_WINOUT:
350 value &= 0x3F3F;
351 softwareRenderer->winout.packed = value;
352 softwareRenderer->objwin.packed = value >> 8;
353 break;
354 case REG_MOSAIC:
355 softwareRenderer->mosaic = value;
356 break;
357 case REG_GREENSWP:
358 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
359 break;
360 default:
361 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
362 }
363 return value;
364}
365
366static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
367 if (renderer->cache) {
368 mTileCacheWriteVRAM(renderer->cache, address);
369 }
370}
371
372static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
373 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
374 softwareRenderer->oamDirty = 1;
375 UNUSED(oam);
376}
377
378static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
379 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
380#ifdef COLOR_16_BIT
381#ifdef COLOR_5_6_5
382 unsigned color = 0;
383 color |= (value & 0x001F) << 11;
384 color |= (value & 0x03E0) << 1;
385 color |= (value & 0x7C00) >> 10;
386#else
387 unsigned color = value;
388#endif
389#else
390 unsigned color = 0;
391 color |= (value << 3) & 0xF8;
392 color |= (value << 6) & 0xF800;
393 color |= (value << 9) & 0xF80000;
394 color |= (color >> 5) & 0x070707;
395#endif
396 softwareRenderer->normalPalette[address >> 1] = color;
397 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
398 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
399 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
400 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
401 }
402 if (renderer->cache) {
403 mTileCacheWritePalette(renderer->cache, address);
404 }
405}
406
407static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
408 if (win->v.end >= win->v.start) {
409 if (y >= win->v.end) {
410 return;
411 }
412 if (y < win->v.start) {
413 return;
414 }
415 } else if (y >= win->v.end && y < win->v.start) {
416 return;
417 }
418 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
419 struct WindowN splits[2] = { *win, *win };
420 splits[0].h.start = 0;
421 splits[1].h.end = softwareRenderer->masterEnd;
422 _breakWindowInner(softwareRenderer, &splits[0]);
423 _breakWindowInner(softwareRenderer, &splits[1]);
424 } else {
425 _breakWindowInner(softwareRenderer, win);
426 }
427}
428
429static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
430 int activeWindow;
431 int startX = 0;
432 if (win->h.end > 0) {
433 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
434 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
435 // Insert a window before the end of the active window
436 struct Window oldWindow = softwareRenderer->windows[activeWindow];
437 if (win->h.start > startX) {
438 // And after the start of the active window
439 int nextWindow = softwareRenderer->nWindows;
440 ++softwareRenderer->nWindows;
441 for (; nextWindow > activeWindow; --nextWindow) {
442 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
443 }
444 softwareRenderer->windows[activeWindow].endX = win->h.start;
445 ++activeWindow;
446 }
447 softwareRenderer->windows[activeWindow].control = win->control;
448 softwareRenderer->windows[activeWindow].endX = win->h.end;
449 if (win->h.end >= oldWindow.endX) {
450 // Trim off extra windows we've overwritten
451 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
452 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
453 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
454 return;
455 }
456 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
457 --softwareRenderer->nWindows;
458 }
459 } else {
460 ++activeWindow;
461 int nextWindow = softwareRenderer->nWindows;
462 ++softwareRenderer->nWindows;
463 for (; nextWindow > activeWindow; --nextWindow) {
464 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
465 }
466 softwareRenderer->windows[activeWindow] = oldWindow;
467 }
468 break;
469 }
470 startX = softwareRenderer->windows[activeWindow].endX;
471 }
472 }
473#ifdef DEBUG
474 if (softwareRenderer->nWindows > MAX_WINDOW) {
475 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
476 }
477#endif
478}
479
480static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
481 int i;
482 int p;
483 int oamMax = 0;
484 int maxP = 1;
485 if (renderer->combinedObjSort) {
486 maxP = 4;
487 }
488 for (p = 0; p < maxP; ++p) {
489 for (i = 0; i < 128; ++i) {
490 struct GBAObj obj;
491 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
492 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
493 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
494 if (renderer->combinedObjSort && GBAObjAttributesCGetPriority(obj.c) != p) {
495 continue;
496 }
497 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
498 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
499 if (GBAObjAttributesAIsTransformed(obj.a)) {
500 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
501 }
502 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= 256) {
503 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
504 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
505 renderer->sprites[oamMax].obj = obj;
506 ++oamMax;
507 }
508 }
509 }
510 }
511 renderer->oamMax = oamMax;
512 renderer->oamDirty = 0;
513}
514
515static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
516 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
517
518 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
519 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
520 int x;
521 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
522 row[x] = GBA_COLOR_WHITE;
523 }
524 return;
525 }
526
527 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
528 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
529 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
530 }
531
532 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
533 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
534 softwareRenderer->d.vramOBJ[0] = objVramBase;
535
536 int w;
537 unsigned priority;
538 for (priority = 0; priority < 4; ++priority) {
539 softwareRenderer->end = 0;
540 for (w = 0; w < softwareRenderer->nWindows; ++w) {
541 softwareRenderer->start = softwareRenderer->end;
542 softwareRenderer->end = softwareRenderer->windows[w].endX;
543 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
544 if (spriteLayers & (1 << priority)) {
545 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
546 }
547 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
548 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
549 }
550 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
551 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
552 }
553 if (TEST_LAYER_ENABLED(2)) {
554 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
555 case 0:
556 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
557 break;
558 case 1:
559 case 2:
560 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
561 break;
562 case 3:
563 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
564 break;
565 case 4:
566 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
567 break;
568 case 5:
569 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
570 break;
571 }
572 }
573 if (TEST_LAYER_ENABLED(3)) {
574 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
575 case 0:
576 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
577 break;
578 case 2:
579 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
580 break;
581 }
582 }
583 }
584 }
585 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
586 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
587 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
588 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
589 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
590 }
591
592 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
593
594#ifdef COLOR_16_BIT
595#if defined(__ARM_NEON) && !defined(__APPLE__)
596 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
597#else
598 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
599 row[x] = softwareRenderer->row[x];
600 }
601#endif
602#else
603 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
604#endif
605}
606
607static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
608 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
609
610 if (softwareRenderer->temporaryBuffer) {
611 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
612 softwareRenderer->temporaryBuffer = 0;
613 }
614 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
615 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
616 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
617 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
618}
619
620static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
621 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
622 *stride = softwareRenderer->outputBufferStride;
623 *pixels = softwareRenderer->outputBuffer;
624}
625
626static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
627 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
628
629 const color_t* colorPixels = pixels;
630 int i;
631 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
632 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
633 }
634}
635
636static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
637 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
638 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
639 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
640 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
641}
642
643static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
644 UNUSED(renderer);
645 bg->priority = GBARegisterBGCNTGetPriority(value);
646 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
647 bg->charBase &= 0xC000;
648 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
649 bg->multipalette = GBARegisterBGCNTGet256Color(value);
650 bg->screenBase &= ~0xF800;
651 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
652 bg->overflow = GBARegisterBGCNTGetOverflow(value);
653 bg->size = GBARegisterBGCNTGetSize(value);
654 bg->control = value;
655}
656
657static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
658 bg->dx = value;
659}
660
661static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
662 bg->dmx = value;
663}
664
665static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
666 bg->dy = value;
667}
668
669static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
670 bg->dmy = value;
671}
672
673static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
674 bg->refx = (bg->refx & 0xFFFF0000) | value;
675 bg->sx = bg->refx;
676}
677
678static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
679 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
680 bg->refx <<= 4;
681 bg->refx >>= 4;
682 bg->sx = bg->refx;
683}
684
685static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
686 bg->refy = (bg->refy & 0xFFFF0000) | value;
687 bg->sy = bg->refy;
688}
689
690static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
691 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
692 bg->refy <<= 4;
693 bg->refy >>= 4;
694 bg->sy = bg->refy;
695}
696
697static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
698 enum BlendEffect oldEffect = renderer->blendEffect;
699
700 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
701 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
702 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
703 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
704 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
705 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
706 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
707 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
708
709 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
710 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
711 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
712 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
713 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
714
715 if (oldEffect != renderer->blendEffect) {
716 renderer->blendDirty = true;
717 }
718}
719
720void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
721 int x;
722 int masterEnd = softwareRenderer->masterEnd;
723 for (x = 0; x < masterEnd; x += 4) {
724 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
725 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
726 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
727 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
728 }
729
730 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
731 softwareRenderer->nWindows = 1;
732 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
733 softwareRenderer->windows[0].control = softwareRenderer->winout;
734 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
735 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
736 }
737 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
738 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
739 }
740 } else {
741 softwareRenderer->windows[0].control.packed = 0xFF;
742 }
743
744 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
745
746 int w;
747 x = 0;
748 for (w = 0; w < softwareRenderer->nWindows; ++w) {
749 // TOOD: handle objwin on backdrop
750 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
751 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
752 backdrop |= softwareRenderer->normalPalette[0];
753 } else {
754 backdrop |= softwareRenderer->variantPalette[0];
755 }
756 int end = softwareRenderer->windows[w].endX;
757 for (; x & 3; ++x) {
758 softwareRenderer->row[x] = backdrop;
759 }
760 for (; x < end - 3; x += 4) {
761 softwareRenderer->row[x] = backdrop;
762 softwareRenderer->row[x + 1] = backdrop;
763 softwareRenderer->row[x + 2] = backdrop;
764 softwareRenderer->row[x + 3] = backdrop;
765 }
766 for (; x < end; ++x) {
767 softwareRenderer->row[x] = backdrop;
768 }
769 }
770
771 if (softwareRenderer->blendDirty) {
772 _updatePalettes(softwareRenderer);
773 softwareRenderer->blendDirty = false;
774 }
775}
776
777void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
778 int x, w;
779 if (softwareRenderer->target2Bd) {
780 x = 0;
781 for (w = 0; w < softwareRenderer->nWindows; ++w) {
782 uint32_t backdrop = 0;
783 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
784 backdrop |= softwareRenderer->normalPalette[0];
785 } else {
786 backdrop |= softwareRenderer->variantPalette[0];
787 }
788 int end = softwareRenderer->windows[w].endX;
789 for (; x < end; ++x) {
790 uint32_t color = softwareRenderer->row[x];
791 if (color & FLAG_TARGET_1) {
792 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
793 }
794 }
795 }
796 }
797 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
798 x = 0;
799 for (w = 0; w < softwareRenderer->nWindows; ++w) {
800 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
801 continue;
802 }
803 int end = softwareRenderer->windows[w].endX;
804 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
805 for (; x < end; ++x) {
806 uint32_t color = softwareRenderer->row[x];
807 if ((color & 0xFF000000) == FLAG_REBLEND) {
808 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
809 }
810 }
811 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
812 for (; x < end; ++x) {
813 uint32_t color = softwareRenderer->row[x];
814 if ((color & 0xFF000000) == FLAG_REBLEND) {
815 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
816 }
817 }
818 }
819 }
820 }
821}
822
823int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
824 int w;
825 renderer->end = 0;
826 int spriteLayers = 0;
827 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
828 if (renderer->oamDirty) {
829 _cleanOAM(renderer);
830 }
831 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
832 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
833 int mosaicY = y - (y % mosaicV);
834 for (w = 0; w < renderer->nWindows; ++w) {
835 renderer->start = renderer->end;
836 renderer->end = renderer->windows[w].endX;
837 renderer->currentWindow = renderer->windows[w].control;
838 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
839 continue;
840 }
841 int i;
842 int drawn;
843
844 for (i = 0; i < renderer->oamMax; ++i) {
845 int localY = y;
846 if (renderer->spriteCyclesRemaining <= 0) {
847 break;
848 }
849 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
850 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
851 localY = mosaicY;
852 }
853 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
854 continue;
855 }
856 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
857 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
858 }
859 }
860 }
861 return spriteLayers;
862}
863
864static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
865 int i;
866 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
867 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
868 if (renderer->blendEffect == BLEND_BRIGHTEN) {
869 for (i = 0; i < 512; ++i) {
870 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
871 }
872 } else if (renderer->blendEffect == BLEND_DARKEN) {
873 for (i = 0; i < 512; ++i) {
874 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
875 }
876 } else {
877 for (i = 0; i < 512; ++i) {
878 renderer->variantPalette[i] = renderer->normalPalette[i];
879 }
880 }
881}