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->oamMax = 0;
121
122 softwareRenderer->mosaic = 0;
123 softwareRenderer->nextY = 0;
124
125 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
126 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
127 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
128
129 for (i = 0; i < 4; ++i) {
130 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
131 bg->index = i;
132 bg->enabled = 0;
133 bg->priority = 0;
134 bg->charBase = 0;
135 bg->mosaic = 0;
136 bg->multipalette = 0;
137 bg->screenBase = 0;
138 bg->overflow = 0;
139 bg->size = 0;
140 bg->target1 = 0;
141 bg->target2 = 0;
142 bg->x = 0;
143 bg->y = 0;
144 bg->refx = 0;
145 bg->refy = 0;
146 bg->dx = 256;
147 bg->dmx = 0;
148 bg->dy = 0;
149 bg->dmy = 256;
150 bg->sx = 0;
151 bg->sy = 0;
152 bg->yCache = -1;
153 bg->extPalette = NULL;
154 bg->variantPalette = NULL;
155 }
156}
157
158static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
159 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
160 UNUSED(softwareRenderer);
161}
162
163static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
164 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
165 if (renderer->cache) {
166 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
167 }
168
169 switch (address) {
170 case REG_DISPCNT:
171 value &= 0xFFF7;
172 softwareRenderer->dispcnt = value;
173 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
174 break;
175 case REG_BG0CNT:
176 value &= 0xDFFF;
177 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
178 break;
179 case REG_BG1CNT:
180 value &= 0xDFFF;
181 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
182 break;
183 case REG_BG2CNT:
184 value &= 0xFFFF;
185 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
186 break;
187 case REG_BG3CNT:
188 value &= 0xFFFF;
189 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
190 break;
191 case REG_BG0HOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[0].x = value;
194 break;
195 case REG_BG0VOFS:
196 value &= 0x01FF;
197 softwareRenderer->bg[0].y = value;
198 break;
199 case REG_BG1HOFS:
200 value &= 0x01FF;
201 softwareRenderer->bg[1].x = value;
202 break;
203 case REG_BG1VOFS:
204 value &= 0x01FF;
205 softwareRenderer->bg[1].y = value;
206 break;
207 case REG_BG2HOFS:
208 value &= 0x01FF;
209 softwareRenderer->bg[2].x = value;
210 break;
211 case REG_BG2VOFS:
212 value &= 0x01FF;
213 softwareRenderer->bg[2].y = value;
214 break;
215 case REG_BG3HOFS:
216 value &= 0x01FF;
217 softwareRenderer->bg[3].x = value;
218 break;
219 case REG_BG3VOFS:
220 value &= 0x01FF;
221 softwareRenderer->bg[3].y = value;
222 break;
223 case REG_BG2PA:
224 softwareRenderer->bg[2].dx = value;
225 break;
226 case REG_BG2PB:
227 softwareRenderer->bg[2].dmx = value;
228 break;
229 case REG_BG2PC:
230 softwareRenderer->bg[2].dy = value;
231 break;
232 case REG_BG2PD:
233 softwareRenderer->bg[2].dmy = value;
234 break;
235 case REG_BG2X_LO:
236 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
237 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
238 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
239 }
240 break;
241 case REG_BG2X_HI:
242 GBAVideoSoftwareRendererWriteBGX_HI(&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_BG2Y_LO:
248 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
249 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
250 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
251 }
252 break;
253 case REG_BG2Y_HI:
254 GBAVideoSoftwareRendererWriteBGY_HI(&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_BG3PA:
260 softwareRenderer->bg[3].dx = value;
261 break;
262 case REG_BG3PB:
263 softwareRenderer->bg[3].dmx = value;
264 break;
265 case REG_BG3PC:
266 softwareRenderer->bg[3].dy = value;
267 break;
268 case REG_BG3PD:
269 softwareRenderer->bg[3].dmy = value;
270 break;
271 case REG_BG3X_LO:
272 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
273 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
274 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
275 }
276 break;
277 case REG_BG3X_HI:
278 GBAVideoSoftwareRendererWriteBGX_HI(&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_BG3Y_LO:
284 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
285 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
286 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
287 }
288 break;
289 case REG_BG3Y_HI:
290 GBAVideoSoftwareRendererWriteBGY_HI(&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_BLDCNT:
296 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
297 value &= 0x3FFF;
298 break;
299 case REG_BLDALPHA:
300 softwareRenderer->blda = value & 0x1F;
301 if (softwareRenderer->blda > 0x10) {
302 softwareRenderer->blda = 0x10;
303 }
304 softwareRenderer->bldb = (value >> 8) & 0x1F;
305 if (softwareRenderer->bldb > 0x10) {
306 softwareRenderer->bldb = 0x10;
307 }
308 softwareRenderer->blendDirty = true;
309 value &= 0x1F1F;
310 break;
311 case REG_BLDY:
312 value &= 0x1F;
313 if (value > 0x10) {
314 value = 0x10;
315 }
316 if (softwareRenderer->bldy != value) {
317 softwareRenderer->bldy = value;
318 softwareRenderer->blendDirty = true;
319 }
320 break;
321 case REG_WIN0H:
322 softwareRenderer->winN[0].h.end = value & 0xFF;
323 softwareRenderer->winN[0].h.start = value >> 8;
324 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
325 softwareRenderer->winN[0].h.start = 0;
326 }
327 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
328 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
329 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
330 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
331 }
332 }
333 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
334 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
335 }
336 break;
337 case REG_WIN1H:
338 softwareRenderer->winN[1].h.end = value & 0xFF;
339 softwareRenderer->winN[1].h.start = value >> 8;
340 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
341 softwareRenderer->winN[1].h.start = 0;
342 }
343 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
344 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
345 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
346 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
347 }
348 }
349 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
350 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
351 }
352 break;
353 case REG_WIN0V:
354 softwareRenderer->winN[0].v.end = value & 0xFF;
355 softwareRenderer->winN[0].v.start = value >> 8;
356 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
357 softwareRenderer->winN[0].v.start = 0;
358 }
359 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
360 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
361 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
362 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
363 }
364 }
365 break;
366 case REG_WIN1V:
367 softwareRenderer->winN[1].v.end = value & 0xFF;
368 softwareRenderer->winN[1].v.start = value >> 8;
369 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
370 softwareRenderer->winN[1].v.start = 0;
371 }
372 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
373 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
374 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
375 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
376 }
377 }
378 break;
379 case REG_WININ:
380 value &= 0x3F3F;
381 softwareRenderer->winN[0].control.packed = value;
382 softwareRenderer->winN[1].control.packed = value >> 8;
383 break;
384 case REG_WINOUT:
385 value &= 0x3F3F;
386 softwareRenderer->winout.packed = value;
387 softwareRenderer->objwin.packed = value >> 8;
388 break;
389 case REG_MOSAIC:
390 softwareRenderer->mosaic = value;
391 break;
392 case REG_GREENSWP:
393 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
394 break;
395 default:
396 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
397 }
398 softwareRenderer->nextIo[address >> 1] = value;
399 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
400 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
401 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
402 }
403 return value;
404}
405
406static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
407 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
408 if (renderer->cache) {
409 mCacheSetWriteVRAM(renderer->cache, address);
410 }
411 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
412 softwareRenderer->bg[0].yCache = -1;
413 softwareRenderer->bg[1].yCache = -1;
414 softwareRenderer->bg[2].yCache = -1;
415 softwareRenderer->bg[3].yCache = -1;
416}
417
418static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
419 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
420 UNUSED(oam);
421 softwareRenderer->oamDirty = 1;
422 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
423}
424
425static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
426 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
427 color_t color = mColorFrom555(value);
428 softwareRenderer->normalPalette[address >> 1] = color;
429 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
430 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
431 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
432 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
433 }
434 if (renderer->cache) {
435 mCacheSetWritePalette(renderer->cache, address >> 1, color);
436 }
437 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
438}
439
440static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
441 if (win->v.end >= win->v.start) {
442 if (y >= win->v.end) {
443 return;
444 }
445 if (y < win->v.start) {
446 return;
447 }
448 } else if (y >= win->v.end && y < win->v.start) {
449 return;
450 }
451 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
452 struct WindowN splits[2] = { *win, *win };
453 splits[0].h.start = 0;
454 splits[1].h.end = softwareRenderer->masterEnd;
455 _breakWindowInner(softwareRenderer, &splits[0]);
456 _breakWindowInner(softwareRenderer, &splits[1]);
457 } else {
458 _breakWindowInner(softwareRenderer, win);
459 }
460}
461
462static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
463 int activeWindow;
464 int startX = 0;
465 if (win->h.end > 0) {
466 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
467 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
468 // Insert a window before the end of the active window
469 struct Window oldWindow = softwareRenderer->windows[activeWindow];
470 if (win->h.start > startX) {
471 // And after the start of the active window
472 int nextWindow = softwareRenderer->nWindows;
473 ++softwareRenderer->nWindows;
474 for (; nextWindow > activeWindow; --nextWindow) {
475 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
476 }
477 softwareRenderer->windows[activeWindow].endX = win->h.start;
478 ++activeWindow;
479 }
480 softwareRenderer->windows[activeWindow].control = win->control;
481 softwareRenderer->windows[activeWindow].endX = win->h.end;
482 if (win->h.end >= oldWindow.endX) {
483 // Trim off extra windows we've overwritten
484 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
485 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
486 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
487 return;
488 }
489 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
490 --softwareRenderer->nWindows;
491 }
492 } else {
493 ++activeWindow;
494 int nextWindow = softwareRenderer->nWindows;
495 ++softwareRenderer->nWindows;
496 for (; nextWindow > activeWindow; --nextWindow) {
497 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
498 }
499 softwareRenderer->windows[activeWindow] = oldWindow;
500 }
501 break;
502 }
503 startX = softwareRenderer->windows[activeWindow].endX;
504 }
505 }
506#ifdef DEBUG
507 if (softwareRenderer->nWindows > MAX_WINDOW) {
508 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
509 }
510#endif
511}
512
513static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
514 int i;
515 int p;
516 int oamMax = 0;
517 int maxP = 1;
518 if (renderer->combinedObjSort) {
519 maxP = 4;
520 }
521 for (p = 0; p < maxP; ++p) {
522 for (i = 0; i < 128; ++i) {
523 struct GBAObj obj;
524 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
525 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
526 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
527 if (renderer->combinedObjSort && GBAObjAttributesCGetPriority(obj.c) != p) {
528 continue;
529 }
530 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
531 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
532 if (GBAObjAttributesAIsTransformed(obj.a)) {
533 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
534 }
535 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= 256) {
536 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
537 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
538 renderer->sprites[oamMax].obj = obj;
539 ++oamMax;
540 }
541 }
542 }
543 }
544 renderer->oamMax = oamMax;
545 renderer->oamDirty = 0;
546}
547
548static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
549 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
550
551 if (y == VIDEO_VERTICAL_PIXELS - 1) {
552 softwareRenderer->nextY = 0;
553 } else {
554 softwareRenderer->nextY = y + 1;
555 }
556
557 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
558 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
559 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
560 dirty = true;
561 }
562
563 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
564 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
565 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
566 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
567
568 if (!dirty) {
569 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
570 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
571 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
572 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
573 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
574 }
575 return;
576 }
577
578 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
579 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
580 int x;
581 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
582 row[x] = GBA_COLOR_WHITE;
583 }
584 return;
585 }
586
587 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
588 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
589 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
590 }
591
592 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
593 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
594 softwareRenderer->d.vramOBJ[0] = objVramBase;
595 if (softwareRenderer->blendDirty) {
596 _updatePalettes(softwareRenderer);
597 softwareRenderer->blendDirty = false;
598 }
599
600 int w;
601 unsigned priority;
602 for (priority = 0; priority < 4; ++priority) {
603 softwareRenderer->end = 0;
604 for (w = 0; w < softwareRenderer->nWindows; ++w) {
605 softwareRenderer->start = softwareRenderer->end;
606 softwareRenderer->end = softwareRenderer->windows[w].endX;
607 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
608 if (spriteLayers & (1 << priority)) {
609 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
610 }
611 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
612 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
613 }
614 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
615 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
616 }
617 if (TEST_LAYER_ENABLED(2)) {
618 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
619 case 0:
620 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
621 break;
622 case 1:
623 case 2:
624 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
625 break;
626 case 3:
627 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
628 break;
629 case 4:
630 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
631 break;
632 case 5:
633 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
634 break;
635 }
636 }
637 if (TEST_LAYER_ENABLED(3)) {
638 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
639 case 0:
640 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
641 break;
642 case 2:
643 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
644 break;
645 }
646 }
647 }
648 }
649 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
650 int x = 0;
651 uint32_t mask = 0xFF000000 & ~FLAG_OBJWIN;
652 uint32_t match = FLAG_REBLEND;
653 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
654 mask |= FLAG_OBJWIN;
655 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
656 match |= FLAG_OBJWIN;
657 }
658 }
659 for (w = 0; w < softwareRenderer->nWindows; ++w) {
660 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
661 continue;
662 }
663 int end = softwareRenderer->windows[w].endX;
664 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
665 for (; x < end; ++x) {
666 uint32_t color = softwareRenderer->row[x];
667 if ((color & mask) == match) {
668 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
669 }
670 }
671 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
672 for (; x < end; ++x) {
673 uint32_t color = softwareRenderer->row[x];
674 if ((color & mask) == match) {
675 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
676 }
677 }
678 }
679 }
680 }
681 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
682 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
683 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
684 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
685 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
686 }
687
688 if (softwareRenderer->bg[0].enabled > 0 && softwareRenderer->bg[0].enabled < 4) {
689 ++softwareRenderer->bg[0].enabled;
690 }
691 if (softwareRenderer->bg[1].enabled > 0 && softwareRenderer->bg[1].enabled < 4) {
692 ++softwareRenderer->bg[1].enabled;
693 }
694 if (softwareRenderer->bg[2].enabled > 0 && softwareRenderer->bg[2].enabled < 4) {
695 ++softwareRenderer->bg[2].enabled;
696 }
697 if (softwareRenderer->bg[3].enabled > 0 && softwareRenderer->bg[3].enabled < 4) {
698 ++softwareRenderer->bg[3].enabled;
699 }
700
701 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
702
703#ifdef COLOR_16_BIT
704 size_t x;
705 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
706 row[x] = softwareRenderer->row[x];
707 row[x + 1] = softwareRenderer->row[x + 1];
708 row[x + 2] = softwareRenderer->row[x + 2];
709 row[x + 3] = softwareRenderer->row[x + 3];
710 }
711#else
712 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
713#endif
714 CLEAN_SCANLINE(softwareRenderer, y);
715}
716
717static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
718 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
719
720 softwareRenderer->nextY = 0;
721 if (softwareRenderer->temporaryBuffer) {
722 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
723 softwareRenderer->temporaryBuffer = 0;
724 }
725 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
726 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
727 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
728 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
729
730 if (softwareRenderer->bg[0].enabled > 0) {
731 softwareRenderer->bg[0].enabled = 4;
732 }
733 if (softwareRenderer->bg[1].enabled > 0) {
734 softwareRenderer->bg[1].enabled = 4;
735 }
736 if (softwareRenderer->bg[2].enabled > 0) {
737 softwareRenderer->bg[2].enabled = 4;
738 }
739 if (softwareRenderer->bg[3].enabled > 0) {
740 softwareRenderer->bg[3].enabled = 4;
741 }
742}
743
744static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
745 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
746 *stride = softwareRenderer->outputBufferStride;
747 *pixels = softwareRenderer->outputBuffer;
748}
749
750static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
751 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
752
753 const color_t* colorPixels = pixels;
754 int i;
755 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
756 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
757 }
758}
759
760static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
761 if (renderer->d.disableBG[bg] || !active) {
762 renderer->bg[bg].enabled = 0;
763 } else if (!renderer->bg[bg].enabled && active) {
764 if (renderer->nextY == 0) {
765 renderer->bg[bg].enabled = 4;
766 } else {
767 renderer->bg[bg].enabled = 1;
768 }
769 }
770}
771
772static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
773 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
774 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
775 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
776 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
777}
778
779static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
780 UNUSED(renderer);
781 bg->priority = GBARegisterBGCNTGetPriority(value);
782 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
783 bg->charBase &= 0xC000;
784 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
785 bg->multipalette = GBARegisterBGCNTGet256Color(value);
786 bg->screenBase &= ~0xF800;
787 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
788 bg->overflow = GBARegisterBGCNTGetOverflow(value);
789 bg->size = GBARegisterBGCNTGetSize(value);
790 bg->control = value;
791}
792
793static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
794 bg->refx = (bg->refx & 0xFFFF0000) | value;
795 bg->sx = bg->refx;
796}
797
798static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
799 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
800 bg->refx <<= 4;
801 bg->refx >>= 4;
802 bg->sx = bg->refx;
803}
804
805static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
806 bg->refy = (bg->refy & 0xFFFF0000) | value;
807 bg->sy = bg->refy;
808}
809
810static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
811 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
812 bg->refy <<= 4;
813 bg->refy >>= 4;
814 bg->sy = bg->refy;
815}
816
817static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
818 enum BlendEffect oldEffect = renderer->blendEffect;
819
820 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
821 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
822 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
823 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
824 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
825 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
826 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
827 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
828
829 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
830 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
831 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
832 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
833 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
834
835 if (oldEffect != renderer->blendEffect) {
836 renderer->blendDirty = true;
837 }
838}
839
840void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
841 int x;
842 int masterEnd = softwareRenderer->masterEnd;
843 for (x = 0; x < masterEnd; x += 4) {
844 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
845 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
846 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
847 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
848 }
849
850 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
851 softwareRenderer->nWindows = 1;
852 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
853 softwareRenderer->windows[0].control = softwareRenderer->winout;
854 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
855 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
856 }
857 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
858 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
859 }
860 } else {
861 softwareRenderer->windows[0].control.packed = 0xFF;
862 }
863
864 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
865
866 int w;
867 x = 0;
868 for (w = 0; w < softwareRenderer->nWindows; ++w) {
869 // TOOD: handle objwin on backdrop
870 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
871 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
872 backdrop |= softwareRenderer->normalPalette[0];
873 } else {
874 backdrop |= softwareRenderer->variantPalette[0];
875 }
876 int end = softwareRenderer->windows[w].endX;
877 for (; x & 3; ++x) {
878 softwareRenderer->row[x] = backdrop;
879 }
880 for (; x < end - 3; x += 4) {
881 softwareRenderer->row[x] = backdrop;
882 softwareRenderer->row[x + 1] = backdrop;
883 softwareRenderer->row[x + 2] = backdrop;
884 softwareRenderer->row[x + 3] = backdrop;
885 }
886 for (; x < end; ++x) {
887 softwareRenderer->row[x] = backdrop;
888 }
889 }
890
891 if (softwareRenderer->blendDirty) {
892 _updatePalettes(softwareRenderer);
893 softwareRenderer->blendDirty = false;
894 }
895}
896
897void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
898 int x, w;
899 if (softwareRenderer->target2Bd) {
900 x = 0;
901 for (w = 0; w < softwareRenderer->nWindows; ++w) {
902 uint32_t backdrop = 0;
903 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
904 backdrop |= softwareRenderer->normalPalette[0];
905 } else {
906 backdrop |= softwareRenderer->variantPalette[0];
907 }
908 int end = softwareRenderer->windows[w].endX;
909 for (; x < end; ++x) {
910 uint32_t color = softwareRenderer->row[x];
911 if (color & FLAG_TARGET_1) {
912 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
913 }
914 }
915 }
916 }
917 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
918 x = 0;
919 for (w = 0; w < softwareRenderer->nWindows; ++w) {
920 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
921 continue;
922 }
923 int end = softwareRenderer->windows[w].endX;
924 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
925 for (; x < end; ++x) {
926 uint32_t color = softwareRenderer->row[x];
927 if ((color & 0xFF000000) == FLAG_REBLEND) {
928 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
929 }
930 }
931 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
932 for (; x < end; ++x) {
933 uint32_t color = softwareRenderer->row[x];
934 if ((color & 0xFF000000) == FLAG_REBLEND) {
935 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
936 }
937 }
938 }
939 }
940 }
941}
942
943int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
944 int w;
945 renderer->end = 0;
946 int spriteLayers = 0;
947 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
948 if (renderer->oamDirty) {
949 _cleanOAM(renderer);
950 }
951 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
952 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
953 int mosaicY = y - (y % mosaicV);
954 for (w = 0; w < renderer->nWindows; ++w) {
955 renderer->start = renderer->end;
956 renderer->end = renderer->windows[w].endX;
957 renderer->currentWindow = renderer->windows[w].control;
958 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
959 continue;
960 }
961 int i;
962 int drawn;
963
964 for (i = 0; i < renderer->oamMax; ++i) {
965 int localY = y;
966 if (renderer->spriteCyclesRemaining <= 0) {
967 break;
968 }
969 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
970 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
971 localY = mosaicY;
972 }
973 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
974 continue;
975 }
976 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
977 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
978 }
979 }
980 }
981 return spriteLayers;
982}
983
984static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
985 int i;
986 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
987 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
988 if (renderer->blendEffect == BLEND_BRIGHTEN) {
989 for (i = 0; i < 512; ++i) {
990 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
991 }
992 } else if (renderer->blendEffect == BLEND_DARKEN) {
993 for (i = 0; i < 512; ++i) {
994 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
995 }
996 } else {
997 for (i = 0; i < 512; ++i) {
998 renderer->variantPalette[i] = renderer->normalPalette[i];
999 }
1000 }
1001}