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/cache-set.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11#include <mgba/internal/gba/renderers/cache-set.h>
12
13#include <mgba-util/arm-algo.h>
14#include <mgba-util/memory.h>
15
16#define DIRTY_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] |= (1 << (Y & 0x1F))
17#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1 << (Y & 0x1F))
18
19static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
20static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
21static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
22static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
23static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
24static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
25static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
26static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
27static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
28static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
29static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
30
31static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
32static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, 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->oamDirty = 1;
121 softwareRenderer->oamMax = 0;
122
123 softwareRenderer->mosaic = 0;
124 softwareRenderer->nextY = 0;
125
126 softwareRenderer->objOffsetX = 0;
127 softwareRenderer->objOffsetY = 0;
128
129 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
130 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
131 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
132
133 for (i = 0; i < 4; ++i) {
134 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
135 bg->index = i;
136 bg->enabled = 0;
137 bg->priority = 0;
138 bg->charBase = 0;
139 bg->mosaic = 0;
140 bg->multipalette = 0;
141 bg->screenBase = 0;
142 bg->overflow = 0;
143 bg->size = 0;
144 bg->target1 = 0;
145 bg->target2 = 0;
146 bg->x = 0;
147 bg->y = 0;
148 bg->refx = 0;
149 bg->refy = 0;
150 bg->dx = 256;
151 bg->dmx = 0;
152 bg->dy = 0;
153 bg->dmy = 256;
154 bg->sx = 0;
155 bg->sy = 0;
156 bg->yCache = -1;
157 bg->extPalette = NULL;
158 bg->variantPalette = NULL;
159 bg->offsetX = 0;
160 bg->offsetY = 0;
161 }
162}
163
164static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
165 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
166 UNUSED(softwareRenderer);
167}
168
169static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
170 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
171 if (renderer->cache) {
172 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
173 }
174
175 switch (address) {
176 case REG_DISPCNT:
177 value &= 0xFFF7;
178 softwareRenderer->dispcnt = value;
179 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
180 break;
181 case REG_BG0CNT:
182 value &= 0xDFFF;
183 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
184 break;
185 case REG_BG1CNT:
186 value &= 0xDFFF;
187 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
188 break;
189 case REG_BG2CNT:
190 value &= 0xFFFF;
191 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
192 break;
193 case REG_BG3CNT:
194 value &= 0xFFFF;
195 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
196 break;
197 case REG_BG0HOFS:
198 value &= 0x01FF;
199 softwareRenderer->bg[0].x = value;
200 break;
201 case REG_BG0VOFS:
202 value &= 0x01FF;
203 softwareRenderer->bg[0].y = value;
204 break;
205 case REG_BG1HOFS:
206 value &= 0x01FF;
207 softwareRenderer->bg[1].x = value;
208 break;
209 case REG_BG1VOFS:
210 value &= 0x01FF;
211 softwareRenderer->bg[1].y = value;
212 break;
213 case REG_BG2HOFS:
214 value &= 0x01FF;
215 softwareRenderer->bg[2].x = value;
216 break;
217 case REG_BG2VOFS:
218 value &= 0x01FF;
219 softwareRenderer->bg[2].y = value;
220 break;
221 case REG_BG3HOFS:
222 value &= 0x01FF;
223 softwareRenderer->bg[3].x = value;
224 break;
225 case REG_BG3VOFS:
226 value &= 0x01FF;
227 softwareRenderer->bg[3].y = value;
228 break;
229 case REG_BG2PA:
230 softwareRenderer->bg[2].dx = value;
231 break;
232 case REG_BG2PB:
233 softwareRenderer->bg[2].dmx = value;
234 break;
235 case REG_BG2PC:
236 softwareRenderer->bg[2].dy = value;
237 break;
238 case REG_BG2PD:
239 softwareRenderer->bg[2].dmy = value;
240 break;
241 case REG_BG2X_LO:
242 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
243 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
244 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
245 }
246 break;
247 case REG_BG2X_HI:
248 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
249 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
250 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
251 }
252 break;
253 case REG_BG2Y_LO:
254 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
255 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
256 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
257 }
258 break;
259 case REG_BG2Y_HI:
260 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
261 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
262 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
263 }
264 break;
265 case REG_BG3PA:
266 softwareRenderer->bg[3].dx = value;
267 break;
268 case REG_BG3PB:
269 softwareRenderer->bg[3].dmx = value;
270 break;
271 case REG_BG3PC:
272 softwareRenderer->bg[3].dy = value;
273 break;
274 case REG_BG3PD:
275 softwareRenderer->bg[3].dmy = value;
276 break;
277 case REG_BG3X_LO:
278 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
279 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
280 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
281 }
282 break;
283 case REG_BG3X_HI:
284 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
285 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
286 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
287 }
288 break;
289 case REG_BG3Y_LO:
290 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
291 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
292 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
293 }
294 break;
295 case REG_BG3Y_HI:
296 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
297 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
298 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
299 }
300 break;
301 case REG_BLDCNT:
302 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
303 value &= 0x3FFF;
304 break;
305 case REG_BLDALPHA:
306 softwareRenderer->blda = value & 0x1F;
307 if (softwareRenderer->blda > 0x10) {
308 softwareRenderer->blda = 0x10;
309 }
310 softwareRenderer->bldb = (value >> 8) & 0x1F;
311 if (softwareRenderer->bldb > 0x10) {
312 softwareRenderer->bldb = 0x10;
313 }
314 softwareRenderer->blendDirty = true;
315 value &= 0x1F1F;
316 break;
317 case REG_BLDY:
318 value &= 0x1F;
319 if (value > 0x10) {
320 value = 0x10;
321 }
322 if (softwareRenderer->bldy != value) {
323 softwareRenderer->bldy = value;
324 softwareRenderer->blendDirty = true;
325 }
326 break;
327 case REG_WIN0H:
328 softwareRenderer->winN[0].h.end = value & 0xFF;
329 softwareRenderer->winN[0].h.start = value >> 8;
330 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
331 softwareRenderer->winN[0].h.start = 0;
332 }
333 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
334 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
335 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
336 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
337 }
338 }
339 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
340 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
341 }
342 break;
343 case REG_WIN1H:
344 softwareRenderer->winN[1].h.end = value & 0xFF;
345 softwareRenderer->winN[1].h.start = value >> 8;
346 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
347 softwareRenderer->winN[1].h.start = 0;
348 }
349 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
350 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
351 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
352 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
353 }
354 }
355 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
356 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
357 }
358 break;
359 case REG_WIN0V:
360 softwareRenderer->winN[0].v.end = value & 0xFF;
361 softwareRenderer->winN[0].v.start = value >> 8;
362 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
363 softwareRenderer->winN[0].v.start = 0;
364 }
365 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
366 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
367 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
368 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
369 }
370 }
371 break;
372 case REG_WIN1V:
373 softwareRenderer->winN[1].v.end = value & 0xFF;
374 softwareRenderer->winN[1].v.start = value >> 8;
375 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
376 softwareRenderer->winN[1].v.start = 0;
377 }
378 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
379 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
380 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
381 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
382 }
383 }
384 break;
385 case REG_WININ:
386 value &= 0x3F3F;
387 softwareRenderer->winN[0].control.packed = value;
388 softwareRenderer->winN[1].control.packed = value >> 8;
389 break;
390 case REG_WINOUT:
391 value &= 0x3F3F;
392 softwareRenderer->winout.packed = value;
393 softwareRenderer->objwin.packed = value >> 8;
394 break;
395 case REG_MOSAIC:
396 softwareRenderer->mosaic = value;
397 break;
398 case REG_GREENSWP:
399 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
400 break;
401 default:
402 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
403 }
404 softwareRenderer->nextIo[address >> 1] = value;
405 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
406 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
407 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
408 }
409 return value;
410}
411
412static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
413 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
414 if (renderer->cache) {
415 mCacheSetWriteVRAM(renderer->cache, address);
416 }
417 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
418 softwareRenderer->bg[0].yCache = -1;
419 softwareRenderer->bg[1].yCache = -1;
420 softwareRenderer->bg[2].yCache = -1;
421 softwareRenderer->bg[3].yCache = -1;
422}
423
424static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
425 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
426 UNUSED(oam);
427 softwareRenderer->oamDirty = 1;
428 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
429}
430
431static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
432 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
433 color_t color = mColorFrom555(value);
434 softwareRenderer->normalPalette[address >> 1] = color;
435 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
436 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
437 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
438 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
439 }
440 if (renderer->cache) {
441 mCacheSetWritePalette(renderer->cache, address >> 1, color);
442 }
443 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
444}
445
446static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
447 if (win->v.end >= win->v.start) {
448 if (y >= win->v.end) {
449 return;
450 }
451 if (y < win->v.start) {
452 return;
453 }
454 } else if (y >= win->v.end && y < win->v.start) {
455 return;
456 }
457 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
458 struct WindowN splits[2] = { *win, *win };
459 splits[0].h.start = 0;
460 splits[1].h.end = softwareRenderer->masterEnd;
461 _breakWindowInner(softwareRenderer, &splits[0]);
462 _breakWindowInner(softwareRenderer, &splits[1]);
463 } else {
464 _breakWindowInner(softwareRenderer, win);
465 }
466}
467
468static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
469 int activeWindow;
470 int startX = 0;
471 if (win->h.end > 0) {
472 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
473 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
474 // Insert a window before the end of the active window
475 struct Window oldWindow = softwareRenderer->windows[activeWindow];
476 if (win->h.start > startX) {
477 // And after the start of the active window
478 int nextWindow = softwareRenderer->nWindows;
479 ++softwareRenderer->nWindows;
480 for (; nextWindow > activeWindow; --nextWindow) {
481 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
482 }
483 softwareRenderer->windows[activeWindow].endX = win->h.start;
484 ++activeWindow;
485 }
486 softwareRenderer->windows[activeWindow].control = win->control;
487 softwareRenderer->windows[activeWindow].endX = win->h.end;
488 if (win->h.end >= oldWindow.endX) {
489 // Trim off extra windows we've overwritten
490 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
491 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
492 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
493 return;
494 }
495 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
496 --softwareRenderer->nWindows;
497 }
498 } else {
499 ++activeWindow;
500 int nextWindow = softwareRenderer->nWindows;
501 ++softwareRenderer->nWindows;
502 for (; nextWindow > activeWindow; --nextWindow) {
503 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
504 }
505 softwareRenderer->windows[activeWindow] = oldWindow;
506 }
507 break;
508 }
509 startX = softwareRenderer->windows[activeWindow].endX;
510 }
511 }
512#ifdef DEBUG
513 if (softwareRenderer->nWindows > MAX_WINDOW) {
514 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
515 }
516#endif
517}
518
519static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
520 int i;
521 int p;
522 int oamMax = 0;
523 int maxP = 1;
524 if (renderer->combinedObjSort) {
525 maxP = 4;
526 }
527 for (p = 0; p < maxP; ++p) {
528 for (i = 0; i < 128; ++i) {
529 struct GBAObj obj;
530 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
531 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
532 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
533 if (renderer->combinedObjSort && GBAObjAttributesCGetPriority(obj.c) != p) {
534 continue;
535 }
536 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
537 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
538 if (GBAObjAttributesAIsTransformed(obj.a)) {
539 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
540 }
541 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= 256) {
542 int y = GBAObjAttributesAGetY(obj.a) + renderer->objOffsetY;
543 renderer->sprites[oamMax].y = y;
544 renderer->sprites[oamMax].endY = y + height;
545 renderer->sprites[oamMax].obj = obj;
546 ++oamMax;
547 }
548 }
549 }
550 }
551 renderer->oamMax = oamMax;
552 renderer->oamDirty = 0;
553}
554
555static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
556 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
557
558 if (y == VIDEO_VERTICAL_PIXELS - 1) {
559 softwareRenderer->nextY = 0;
560 } else {
561 softwareRenderer->nextY = y + 1;
562 }
563
564 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
565 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
566 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
567 dirty = true;
568 }
569
570 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
571 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
572 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
573 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
574
575 if (!dirty) {
576 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
577 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
578 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
579 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
580 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
581 }
582 return;
583 }
584
585 CLEAN_SCANLINE(softwareRenderer, y);
586
587 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
588 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
589 int x;
590 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
591 row[x] = GBA_COLOR_WHITE;
592 }
593 return;
594 }
595
596 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
597 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
598 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
599 }
600
601 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
602 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
603 softwareRenderer->d.vramOBJ[0] = objVramBase;
604 if (softwareRenderer->blendDirty) {
605 _updatePalettes(softwareRenderer);
606 softwareRenderer->blendDirty = false;
607 }
608
609 int w;
610 unsigned priority;
611 for (priority = 0; priority < 4; ++priority) {
612 softwareRenderer->end = 0;
613 for (w = 0; w < softwareRenderer->nWindows; ++w) {
614 softwareRenderer->start = softwareRenderer->end;
615 softwareRenderer->end = softwareRenderer->windows[w].endX;
616 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
617 if (spriteLayers & (1 << priority)) {
618 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
619 }
620 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
621 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
622 }
623 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
624 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
625 }
626 if (TEST_LAYER_ENABLED(2)) {
627 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
628 case 0:
629 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
630 break;
631 case 1:
632 case 2:
633 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
634 break;
635 case 3:
636 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
637 break;
638 case 4:
639 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
640 break;
641 case 5:
642 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
643 break;
644 }
645 }
646 if (TEST_LAYER_ENABLED(3)) {
647 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
648 case 0:
649 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
650 break;
651 case 2:
652 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
653 break;
654 }
655 }
656 }
657 }
658 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
659 int x = 0;
660 uint32_t mask = FLAG_REBLEND | FLAG_TARGET_1 | FLAG_IS_BACKGROUND;
661 uint32_t match = FLAG_REBLEND;
662 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
663 mask |= FLAG_OBJWIN;
664 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
665 match |= FLAG_OBJWIN;
666 }
667 }
668 for (w = 0; w < softwareRenderer->nWindows; ++w) {
669 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
670 continue;
671 }
672 int end = softwareRenderer->windows[w].endX;
673 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
674 for (; x < end; ++x) {
675 uint32_t color = softwareRenderer->row[x];
676 if ((color & mask) == match) {
677 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
678 }
679 }
680 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
681 for (; x < end; ++x) {
682 uint32_t color = softwareRenderer->row[x];
683 if ((color & mask) == match) {
684 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
685 }
686 }
687 }
688 }
689 }
690 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
691 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
692 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
693 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
694 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
695 }
696
697 if (softwareRenderer->bg[0].enabled > 0 && softwareRenderer->bg[0].enabled < 4) {
698 ++softwareRenderer->bg[0].enabled;
699 DIRTY_SCANLINE(softwareRenderer, y);
700 }
701 if (softwareRenderer->bg[1].enabled > 0 && softwareRenderer->bg[1].enabled < 4) {
702 ++softwareRenderer->bg[1].enabled;
703 DIRTY_SCANLINE(softwareRenderer, y);
704 }
705 if (softwareRenderer->bg[2].enabled > 0 && softwareRenderer->bg[2].enabled < 4) {
706 ++softwareRenderer->bg[2].enabled;
707 DIRTY_SCANLINE(softwareRenderer, y);
708 }
709 if (softwareRenderer->bg[3].enabled > 0 && softwareRenderer->bg[3].enabled < 4) {
710 ++softwareRenderer->bg[3].enabled;
711 DIRTY_SCANLINE(softwareRenderer, y);
712 }
713
714 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
715
716#ifdef COLOR_16_BIT
717 size_t x;
718 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
719 row[x] = softwareRenderer->row[x];
720 row[x + 1] = softwareRenderer->row[x + 1];
721 row[x + 2] = softwareRenderer->row[x + 2];
722 row[x + 3] = softwareRenderer->row[x + 3];
723 }
724#else
725 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
726#endif
727}
728
729static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
730 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
731
732 softwareRenderer->nextY = 0;
733 if (softwareRenderer->temporaryBuffer) {
734 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
735 softwareRenderer->temporaryBuffer = 0;
736 }
737 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
738 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
739 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
740 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
741
742 if (softwareRenderer->bg[0].enabled > 0) {
743 softwareRenderer->bg[0].enabled = 4;
744 }
745 if (softwareRenderer->bg[1].enabled > 0) {
746 softwareRenderer->bg[1].enabled = 4;
747 }
748 if (softwareRenderer->bg[2].enabled > 0) {
749 softwareRenderer->bg[2].enabled = 4;
750 }
751 if (softwareRenderer->bg[3].enabled > 0) {
752 softwareRenderer->bg[3].enabled = 4;
753 }
754}
755
756static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
757 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
758 *stride = softwareRenderer->outputBufferStride;
759 *pixels = softwareRenderer->outputBuffer;
760}
761
762static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
763 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
764
765 const color_t* colorPixels = pixels;
766 int i;
767 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
768 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
769 }
770}
771
772static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
773 int wasActive = renderer->bg[bg].enabled;
774 if (!active) {
775 renderer->bg[bg].enabled = 0;
776 } else if (!wasActive && active) {
777 if (renderer->nextY == 0 || GBARegisterDISPCNTGetMode(renderer->dispcnt) > 2) {
778 // TODO: Investigate in more depth how switching background works in different modes
779 renderer->bg[bg].enabled = 4;
780 } else {
781 renderer->bg[bg].enabled = 1;
782 }
783 }
784}
785
786static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
787 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
788 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
789 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
790 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
791}
792
793static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
794 UNUSED(renderer);
795 bg->priority = GBARegisterBGCNTGetPriority(value);
796 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
797 bg->charBase &= 0xC000;
798 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
799 bg->multipalette = GBARegisterBGCNTGet256Color(value);
800 bg->screenBase &= ~0xF800;
801 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
802 bg->overflow = GBARegisterBGCNTGetOverflow(value);
803 bg->size = GBARegisterBGCNTGetSize(value);
804 bg->control = value;
805}
806
807static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
808 bg->refx = (bg->refx & 0xFFFF0000) | value;
809 bg->sx = bg->refx;
810}
811
812static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
813 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
814 bg->refx <<= 4;
815 bg->refx >>= 4;
816 bg->sx = bg->refx;
817}
818
819static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
820 bg->refy = (bg->refy & 0xFFFF0000) | value;
821 bg->sy = bg->refy;
822}
823
824static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
825 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
826 bg->refy <<= 4;
827 bg->refy >>= 4;
828 bg->sy = bg->refy;
829}
830
831static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
832 enum BlendEffect oldEffect = renderer->blendEffect;
833
834 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
835 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
836 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
837 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
838 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
839 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
840 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
841 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
842
843 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
844 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
845 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
846 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
847 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
848
849 if (oldEffect != renderer->blendEffect) {
850 renderer->blendDirty = true;
851 }
852}
853
854void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
855 int x;
856 int masterEnd = softwareRenderer->masterEnd;
857 for (x = 0; x < masterEnd; x += 4) {
858 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
859 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
860 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
861 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
862 }
863
864 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
865 softwareRenderer->nWindows = 1;
866 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
867 softwareRenderer->windows[0].control = softwareRenderer->winout;
868 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
869 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
870 }
871 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
872 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
873 }
874 } else {
875 softwareRenderer->windows[0].control.packed = 0xFF;
876 }
877
878 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
879
880 int w;
881 x = 0;
882 for (w = 0; w < softwareRenderer->nWindows; ++w) {
883 // TOOD: handle objwin on backdrop
884 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
885 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
886 backdrop |= softwareRenderer->normalPalette[0];
887 } else {
888 backdrop |= softwareRenderer->variantPalette[0];
889 }
890 int end = softwareRenderer->windows[w].endX;
891 for (; x & 3; ++x) {
892 softwareRenderer->row[x] = backdrop;
893 }
894 for (; x < end - 3; x += 4) {
895 softwareRenderer->row[x] = backdrop;
896 softwareRenderer->row[x + 1] = backdrop;
897 softwareRenderer->row[x + 2] = backdrop;
898 softwareRenderer->row[x + 3] = backdrop;
899 }
900 for (; x < end; ++x) {
901 softwareRenderer->row[x] = backdrop;
902 }
903 }
904
905 if (softwareRenderer->blendDirty) {
906 _updatePalettes(softwareRenderer);
907 softwareRenderer->blendDirty = false;
908 }
909}
910
911void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
912 int x, w;
913 if (softwareRenderer->target2Bd) {
914 x = 0;
915 for (w = 0; w < softwareRenderer->nWindows; ++w) {
916 uint32_t backdrop = 0;
917 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
918 backdrop |= softwareRenderer->normalPalette[0];
919 } else {
920 backdrop |= softwareRenderer->variantPalette[0];
921 }
922 int end = softwareRenderer->windows[w].endX;
923 for (; x < end; ++x) {
924 uint32_t color = softwareRenderer->row[x];
925 if (color & FLAG_TARGET_1) {
926 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
927 }
928 }
929 }
930 }
931 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
932 x = 0;
933 for (w = 0; w < softwareRenderer->nWindows; ++w) {
934 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
935 continue;
936 }
937 int end = softwareRenderer->windows[w].endX;
938 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
939 for (; x < end; ++x) {
940 uint32_t color = softwareRenderer->row[x];
941 if ((color & 0xFF000000) == FLAG_REBLEND) {
942 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
943 }
944 }
945 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
946 for (; x < end; ++x) {
947 uint32_t color = softwareRenderer->row[x];
948 if ((color & 0xFF000000) == FLAG_REBLEND) {
949 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
950 }
951 }
952 }
953 }
954 }
955}
956
957int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
958 int w;
959 int spriteLayers = 0;
960 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
961 if (renderer->oamDirty) {
962 _cleanOAM(renderer);
963 }
964 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
965 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
966 int mosaicY = y - (y % mosaicV);
967 int i;
968 for (i = 0; i < renderer->oamMax; ++i) {
969 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
970 int localY = y;
971 renderer->end = 0;
972 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
973 localY = mosaicY;
974 }
975 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
976 continue;
977 }
978 for (w = 0; w < renderer->nWindows; ++w) {
979 if (renderer->spriteCyclesRemaining <= 0) {
980 break;
981 }
982 renderer->currentWindow = renderer->windows[w].control;
983 renderer->start = renderer->end;
984 renderer->end = renderer->windows[w].endX;
985 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
986 continue;
987 }
988
989 int drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
990 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
991 }
992 if (renderer->spriteCyclesRemaining <= 0) {
993 break;
994 }
995 }
996 }
997 return spriteLayers;
998}
999
1000static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
1001 int i;
1002 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
1003 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
1004 if (renderer->blendEffect == BLEND_BRIGHTEN) {
1005 for (i = 0; i < 512; ++i) {
1006 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
1007 }
1008 } else if (renderer->blendEffect == BLEND_DARKEN) {
1009 for (i = 0; i < 512; ++i) {
1010 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
1011 }
1012 } else {
1013 for (i = 0; i < 512; ++i) {
1014 renderer->variantPalette[i] = renderer->normalPalette[i];
1015 }
1016 }
1017}