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 _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
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 = GBA_VIDEO_HORIZONTAL_PIXELS;
68 renderer->masterHeight = GBA_VIDEO_VERTICAL_PIXELS;
69 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
70
71 renderer->d.highlightBG[0] = false;
72 renderer->d.highlightBG[1] = false;
73 renderer->d.highlightBG[2] = false;
74 renderer->d.highlightBG[3] = false;
75 int i;
76 for (i = 0; i < 128; ++i) {
77 renderer->d.highlightOBJ[i] = false;
78 }
79 renderer->d.highlightColor = GBA_COLOR_WHITE;
80 renderer->d.highlightAmount = 0;
81
82 renderer->temporaryBuffer = 0;
83}
84
85static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
86 GBAVideoSoftwareRendererReset(renderer);
87
88 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
89
90 int y;
91 for (y = 0; y < softwareRenderer->masterHeight; ++y) {
92 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
93 int x;
94 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
95 row[x] = GBA_COLOR_WHITE;
96 }
97 }
98}
99
100static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
101 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
102 int i;
103
104 softwareRenderer->dispcnt = 0x0080;
105
106 softwareRenderer->target1Obj = 0;
107 softwareRenderer->target1Bd = 0;
108 softwareRenderer->target2Obj = 0;
109 softwareRenderer->target2Bd = 0;
110 softwareRenderer->blendEffect = BLEND_NONE;
111 softwareRenderer->masterBright = 0;
112 softwareRenderer->masterBrightY = 0;
113 for (i = 0; i < 1024; i += 2) {
114 uint16_t entry;
115 LOAD_16(entry, i, softwareRenderer->d.palette);
116 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
117 }
118 softwareRenderer->objExtPalette = NULL;
119 softwareRenderer->objExtVariantPalette = NULL;
120 softwareRenderer->blendDirty = false;
121 _updatePalettes(softwareRenderer);
122
123 softwareRenderer->blda = 0;
124 softwareRenderer->bldb = 0;
125 softwareRenderer->bldy = 0;
126
127 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
128 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
129 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
130 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
131 softwareRenderer->oamDirty = 1;
132 softwareRenderer->oamMax = 0;
133
134 softwareRenderer->mosaic = 0;
135 softwareRenderer->nextY = 0;
136
137 softwareRenderer->objOffsetX = 0;
138 softwareRenderer->objOffsetY = 0;
139
140 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
141 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
142 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
143
144 for (i = 0; i < 4; ++i) {
145 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
146 bg->index = i;
147 bg->enabled = 0;
148 bg->priority = 0;
149 bg->charBase = 0;
150 bg->mosaic = 0;
151 bg->multipalette = 0;
152 bg->screenBase = 0;
153 bg->overflow = 0;
154 bg->size = 0;
155 bg->target1 = 0;
156 bg->target2 = 0;
157 bg->x = 0;
158 bg->y = 0;
159 bg->refx = 0;
160 bg->refy = 0;
161 bg->dx = 256;
162 bg->dmx = 0;
163 bg->dy = 0;
164 bg->dmy = 256;
165 bg->sx = 0;
166 bg->sy = 0;
167 bg->yCache = -1;
168 bg->extPalette = NULL;
169 bg->variantPalette = NULL;
170 bg->offsetX = 0;
171 bg->offsetY = 0;
172 }
173}
174
175static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
176 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
177 UNUSED(softwareRenderer);
178}
179
180static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
181 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
182 if (renderer->cache) {
183 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
184 }
185
186 switch (address) {
187 case REG_DISPCNT:
188 value &= 0xFFF7;
189 softwareRenderer->dispcnt = value;
190 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
191 break;
192 case REG_BG0CNT:
193 value &= 0xDFFF;
194 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
195 break;
196 case REG_BG1CNT:
197 value &= 0xDFFF;
198 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
199 break;
200 case REG_BG2CNT:
201 value &= 0xFFFF;
202 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
203 break;
204 case REG_BG3CNT:
205 value &= 0xFFFF;
206 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
207 break;
208 case REG_BG0HOFS:
209 value &= 0x01FF;
210 softwareRenderer->bg[0].x = value;
211 break;
212 case REG_BG0VOFS:
213 value &= 0x01FF;
214 softwareRenderer->bg[0].y = value;
215 break;
216 case REG_BG1HOFS:
217 value &= 0x01FF;
218 softwareRenderer->bg[1].x = value;
219 break;
220 case REG_BG1VOFS:
221 value &= 0x01FF;
222 softwareRenderer->bg[1].y = value;
223 break;
224 case REG_BG2HOFS:
225 value &= 0x01FF;
226 softwareRenderer->bg[2].x = value;
227 break;
228 case REG_BG2VOFS:
229 value &= 0x01FF;
230 softwareRenderer->bg[2].y = value;
231 break;
232 case REG_BG3HOFS:
233 value &= 0x01FF;
234 softwareRenderer->bg[3].x = value;
235 break;
236 case REG_BG3VOFS:
237 value &= 0x01FF;
238 softwareRenderer->bg[3].y = value;
239 break;
240 case REG_BG2PA:
241 softwareRenderer->bg[2].dx = value;
242 break;
243 case REG_BG2PB:
244 softwareRenderer->bg[2].dmx = value;
245 break;
246 case REG_BG2PC:
247 softwareRenderer->bg[2].dy = value;
248 break;
249 case REG_BG2PD:
250 softwareRenderer->bg[2].dmy = value;
251 break;
252 case REG_BG2X_LO:
253 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
254 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
255 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
256 }
257 break;
258 case REG_BG2X_HI:
259 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
260 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
261 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
262 }
263 break;
264 case REG_BG2Y_LO:
265 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
266 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
267 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
268 }
269 break;
270 case REG_BG2Y_HI:
271 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
272 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
273 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
274 }
275 break;
276 case REG_BG3PA:
277 softwareRenderer->bg[3].dx = value;
278 break;
279 case REG_BG3PB:
280 softwareRenderer->bg[3].dmx = value;
281 break;
282 case REG_BG3PC:
283 softwareRenderer->bg[3].dy = value;
284 break;
285 case REG_BG3PD:
286 softwareRenderer->bg[3].dmy = value;
287 break;
288 case REG_BG3X_LO:
289 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
290 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
291 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
292 }
293 break;
294 case REG_BG3X_HI:
295 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
296 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
297 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
298 }
299 break;
300 case REG_BG3Y_LO:
301 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
302 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
303 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
304 }
305 break;
306 case REG_BG3Y_HI:
307 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
308 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
309 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
310 }
311 break;
312 case REG_BLDCNT:
313 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
314 value &= 0x3FFF;
315 break;
316 case REG_BLDALPHA:
317 softwareRenderer->blda = value & 0x1F;
318 if (softwareRenderer->blda > 0x10) {
319 softwareRenderer->blda = 0x10;
320 }
321 softwareRenderer->bldb = (value >> 8) & 0x1F;
322 if (softwareRenderer->bldb > 0x10) {
323 softwareRenderer->bldb = 0x10;
324 }
325 softwareRenderer->blendDirty = true;
326 value &= 0x1F1F;
327 break;
328 case REG_BLDY:
329 value &= 0x1F;
330 if (value > 0x10) {
331 value = 0x10;
332 }
333 if (softwareRenderer->bldy != value) {
334 softwareRenderer->bldy = value;
335 softwareRenderer->blendDirty = true;
336 }
337 break;
338 case REG_WIN0H:
339 softwareRenderer->winN[0].h.end = value & 0xFF;
340 softwareRenderer->winN[0].h.start = value >> 8;
341 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
342 softwareRenderer->winN[0].h.start = 0;
343 }
344 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
345 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
346 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
347 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
348 }
349 }
350 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
351 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
352 }
353 break;
354 case REG_WIN1H:
355 softwareRenderer->winN[1].h.end = value & 0xFF;
356 softwareRenderer->winN[1].h.start = value >> 8;
357 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
358 softwareRenderer->winN[1].h.start = 0;
359 }
360 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
361 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
362 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
363 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
364 }
365 }
366 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
367 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
368 }
369 break;
370 case REG_WIN0V:
371 softwareRenderer->winN[0].v.end = value & 0xFF;
372 softwareRenderer->winN[0].v.start = value >> 8;
373 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
374 softwareRenderer->winN[0].v.start = 0;
375 }
376 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
377 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
378 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
379 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
380 }
381 }
382 break;
383 case REG_WIN1V:
384 softwareRenderer->winN[1].v.end = value & 0xFF;
385 softwareRenderer->winN[1].v.start = value >> 8;
386 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
387 softwareRenderer->winN[1].v.start = 0;
388 }
389 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
390 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
391 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
392 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
393 }
394 }
395 break;
396 case REG_WININ:
397 value &= 0x3F3F;
398 softwareRenderer->winN[0].control.packed = value;
399 softwareRenderer->winN[1].control.packed = value >> 8;
400 break;
401 case REG_WINOUT:
402 value &= 0x3F3F;
403 softwareRenderer->winout.packed = value;
404 softwareRenderer->objwin.packed = value >> 8;
405 break;
406 case REG_MOSAIC:
407 softwareRenderer->mosaic = value;
408 break;
409 case REG_GREENSWP:
410 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
411 break;
412 default:
413 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
414 }
415 softwareRenderer->nextIo[address >> 1] = value;
416 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
417 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
418 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
419 }
420 return value;
421}
422
423static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
424 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
425 if (renderer->cache) {
426 mCacheSetWriteVRAM(renderer->cache, address);
427 }
428 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
429 softwareRenderer->bg[0].yCache = -1;
430 softwareRenderer->bg[1].yCache = -1;
431 softwareRenderer->bg[2].yCache = -1;
432 softwareRenderer->bg[3].yCache = -1;
433}
434
435static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
436 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
437 UNUSED(oam);
438 softwareRenderer->oamDirty = 1;
439 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
440}
441
442static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
443 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
444 color_t color = mColorFrom555(value);
445 softwareRenderer->normalPalette[address >> 1] = color;
446 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
447 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
448 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
449 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
450 }
451 if (renderer->cache) {
452 mCacheSetWritePalette(renderer->cache, address >> 1, color);
453 }
454 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
455}
456
457static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
458 if (win->v.end >= win->v.start) {
459 if (y >= win->v.end) {
460 return;
461 }
462 if (y < win->v.start) {
463 return;
464 }
465 } else if (y >= win->v.end && y < win->v.start) {
466 return;
467 }
468 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
469 struct WindowN splits[2] = { *win, *win };
470 splits[0].h.start = 0;
471 splits[1].h.end = softwareRenderer->masterEnd;
472 _breakWindowInner(softwareRenderer, &splits[0]);
473 _breakWindowInner(softwareRenderer, &splits[1]);
474 } else {
475 _breakWindowInner(softwareRenderer, win);
476 }
477}
478
479static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
480 int activeWindow;
481 int startX = 0;
482 if (win->h.end > 0) {
483 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
484 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
485 // Insert a window before the end of the active window
486 struct Window oldWindow = softwareRenderer->windows[activeWindow];
487 if (win->h.start > startX) {
488 // And after the start of the active window
489 int nextWindow = softwareRenderer->nWindows;
490 ++softwareRenderer->nWindows;
491 for (; nextWindow > activeWindow; --nextWindow) {
492 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
493 }
494 softwareRenderer->windows[activeWindow].endX = win->h.start;
495 ++activeWindow;
496 }
497 softwareRenderer->windows[activeWindow].control = win->control;
498 softwareRenderer->windows[activeWindow].endX = win->h.end;
499 if (win->h.end >= oldWindow.endX) {
500 // Trim off extra windows we've overwritten
501 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
502 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
503 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
504 return;
505 }
506 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
507 --softwareRenderer->nWindows;
508 }
509 } else {
510 ++activeWindow;
511 int nextWindow = softwareRenderer->nWindows;
512 ++softwareRenderer->nWindows;
513 for (; nextWindow > activeWindow; --nextWindow) {
514 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
515 }
516 softwareRenderer->windows[activeWindow] = oldWindow;
517 }
518 break;
519 }
520 startX = softwareRenderer->windows[activeWindow].endX;
521 }
522 }
523#ifdef DEBUG
524 if (softwareRenderer->nWindows > MAX_WINDOW) {
525 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
526 }
527#endif
528}
529
530static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
531 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
532
533 if (y == GBA_VIDEO_VERTICAL_PIXELS - 1) {
534 softwareRenderer->nextY = 0;
535 } else {
536 softwareRenderer->nextY = y + 1;
537 }
538
539 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
540 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
541 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
542 dirty = true;
543 }
544
545 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
546 if (softwareRenderer->cache[y].scale[0][0] != softwareRenderer->bg[2].sx ||
547 softwareRenderer->cache[y].scale[0][1] != softwareRenderer->bg[2].sy ||
548 softwareRenderer->cache[y].scale[1][0] != softwareRenderer->bg[3].sx ||
549 softwareRenderer->cache[y].scale[1][1] != softwareRenderer->bg[3].sy) {
550 dirty = true;
551 }
552 }
553 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
554 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
555 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
556 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
557
558 if (!dirty) {
559 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
560 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
561 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
562 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
563 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
564 }
565 return;
566 }
567
568 CLEAN_SCANLINE(softwareRenderer, y);
569
570 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
571 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
572 int x;
573 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
574 row[x] = GBA_COLOR_WHITE;
575 }
576 return;
577 }
578
579 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
580 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
581 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
582 }
583
584 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
585 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
586 softwareRenderer->d.vramOBJ[0] = objVramBase;
587 if (softwareRenderer->lastHighlightAmount != softwareRenderer->d.highlightAmount) {
588 softwareRenderer->lastHighlightAmount = softwareRenderer->d.highlightAmount;
589 if (softwareRenderer->lastHighlightAmount) {
590 softwareRenderer->blendDirty = true;
591 }
592 }
593
594 if (softwareRenderer->blendDirty) {
595 _updatePalettes(softwareRenderer);
596 softwareRenderer->blendDirty = false;
597 }
598
599 softwareRenderer->bg[0].highlight = softwareRenderer->d.highlightBG[0];
600 softwareRenderer->bg[1].highlight = softwareRenderer->d.highlightBG[1];
601 softwareRenderer->bg[2].highlight = softwareRenderer->d.highlightBG[2];
602 softwareRenderer->bg[3].highlight = softwareRenderer->d.highlightBG[3];
603
604 int w;
605 unsigned priority;
606 for (priority = 0; priority < 4; ++priority) {
607 softwareRenderer->end = 0;
608 for (w = 0; w < softwareRenderer->nWindows; ++w) {
609 softwareRenderer->start = softwareRenderer->end;
610 softwareRenderer->end = softwareRenderer->windows[w].endX;
611 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
612 if (spriteLayers & (1 << priority)) {
613 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
614 }
615 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
616 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
617 }
618 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
619 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
620 }
621 if (TEST_LAYER_ENABLED(2)) {
622 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
623 case 0:
624 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
625 break;
626 case 1:
627 case 2:
628 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
629 break;
630 case 3:
631 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
632 break;
633 case 4:
634 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
635 break;
636 case 5:
637 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
638 break;
639 }
640 }
641 if (TEST_LAYER_ENABLED(3)) {
642 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
643 case 0:
644 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
645 break;
646 case 2:
647 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
648 break;
649 }
650 }
651 }
652 }
653 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
654 int x = 0;
655 uint32_t mask = FLAG_REBLEND | FLAG_TARGET_1 | FLAG_IS_BACKGROUND;
656 uint32_t match = FLAG_REBLEND;
657 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
658 mask |= FLAG_OBJWIN;
659 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
660 match |= FLAG_OBJWIN;
661 }
662 }
663 for (w = 0; w < softwareRenderer->nWindows; ++w) {
664 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
665 continue;
666 }
667 int end = softwareRenderer->windows[w].endX;
668 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
669 for (; x < end; ++x) {
670 uint32_t color = softwareRenderer->row[x];
671 if ((color & mask) == match) {
672 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
673 }
674 }
675 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
676 for (; x < end; ++x) {
677 uint32_t color = softwareRenderer->row[x];
678 if ((color & mask) == match) {
679 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
680 }
681 }
682 }
683 }
684 }
685 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
686 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
687 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
688 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
689 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
690 }
691
692 if (softwareRenderer->bg[0].enabled > 0 && softwareRenderer->bg[0].enabled < 4) {
693 ++softwareRenderer->bg[0].enabled;
694 DIRTY_SCANLINE(softwareRenderer, y);
695 }
696 if (softwareRenderer->bg[1].enabled > 0 && softwareRenderer->bg[1].enabled < 4) {
697 ++softwareRenderer->bg[1].enabled;
698 DIRTY_SCANLINE(softwareRenderer, y);
699 }
700 if (softwareRenderer->bg[2].enabled > 0 && softwareRenderer->bg[2].enabled < 4) {
701 ++softwareRenderer->bg[2].enabled;
702 DIRTY_SCANLINE(softwareRenderer, y);
703 }
704 if (softwareRenderer->bg[3].enabled > 0 && softwareRenderer->bg[3].enabled < 4) {
705 ++softwareRenderer->bg[3].enabled;
706 DIRTY_SCANLINE(softwareRenderer, y);
707 }
708
709 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
710
711#ifdef COLOR_16_BIT
712 size_t x;
713 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
714 row[x] = softwareRenderer->row[x];
715 row[x + 1] = softwareRenderer->row[x + 1];
716 row[x + 2] = softwareRenderer->row[x + 2];
717 row[x + 3] = softwareRenderer->row[x + 3];
718 }
719#else
720 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
721#endif
722}
723
724static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
725 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
726
727 softwareRenderer->nextY = 0;
728 if (softwareRenderer->temporaryBuffer) {
729 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
730 softwareRenderer->temporaryBuffer = 0;
731 }
732 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
733 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
734 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
735 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
736
737 if (softwareRenderer->bg[0].enabled > 0) {
738 softwareRenderer->bg[0].enabled = 4;
739 }
740 if (softwareRenderer->bg[1].enabled > 0) {
741 softwareRenderer->bg[1].enabled = 4;
742 }
743 if (softwareRenderer->bg[2].enabled > 0) {
744 softwareRenderer->bg[2].enabled = 4;
745 }
746 if (softwareRenderer->bg[3].enabled > 0) {
747 softwareRenderer->bg[3].enabled = 4;
748 }
749}
750
751static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
752 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
753 *stride = softwareRenderer->outputBufferStride;
754 *pixels = softwareRenderer->outputBuffer;
755}
756
757static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
758 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
759
760 const color_t* colorPixels = pixels;
761 int i;
762 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
763 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
764 }
765}
766
767static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
768 int wasActive = renderer->bg[bg].enabled;
769 if (!active) {
770 renderer->bg[bg].enabled = 0;
771 } else if (!wasActive && active) {
772 if (renderer->nextY == 0 || GBARegisterDISPCNTGetMode(renderer->dispcnt) > 2) {
773 // TODO: Investigate in more depth how switching background works in different modes
774 renderer->bg[bg].enabled = 4;
775 } else {
776 renderer->bg[bg].enabled = 1;
777 }
778 }
779}
780
781static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
782 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
783 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
784 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
785 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
786}
787
788static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
789 UNUSED(renderer);
790 bg->priority = GBARegisterBGCNTGetPriority(value);
791 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
792 bg->charBase &= 0xC000;
793 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
794 bg->multipalette = GBARegisterBGCNTGet256Color(value);
795 bg->screenBase &= ~0xF800;
796 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
797 bg->overflow = GBARegisterBGCNTGetOverflow(value);
798 bg->size = GBARegisterBGCNTGetSize(value);
799 bg->control = value;
800}
801
802static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
803 bg->refx = (bg->refx & 0xFFFF0000) | value;
804 bg->sx = bg->refx;
805}
806
807static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
808 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
809 bg->refx <<= 4;
810 bg->refx >>= 4;
811 bg->sx = bg->refx;
812}
813
814static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
815 bg->refy = (bg->refy & 0xFFFF0000) | value;
816 bg->sy = bg->refy;
817}
818
819static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
820 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
821 bg->refy <<= 4;
822 bg->refy >>= 4;
823 bg->sy = bg->refy;
824}
825
826static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
827 enum GBAVideoBlendEffect oldEffect = renderer->blendEffect;
828
829 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
830 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
831 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
832 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
833 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
834 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
835 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
836 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
837
838 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
839 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
840 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
841 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
842 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
843
844 if (oldEffect != renderer->blendEffect) {
845 renderer->blendDirty = true;
846 }
847}
848
849void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
850 int x;
851 int masterEnd = softwareRenderer->masterEnd;
852 for (x = 0; x < masterEnd; x += 4) {
853 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
854 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
855 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
856 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
857 }
858
859 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
860 softwareRenderer->nWindows = 1;
861 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
862 softwareRenderer->windows[0].control = softwareRenderer->winout;
863 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
864 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
865 }
866 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
867 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
868 }
869 } else {
870 softwareRenderer->windows[0].control.packed = 0xFF;
871 }
872
873 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
874
875 int w;
876 x = 0;
877 for (w = 0; w < softwareRenderer->nWindows; ++w) {
878 // TOOD: handle objwin on backdrop
879 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
880 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
881 backdrop |= softwareRenderer->normalPalette[0];
882 } else {
883 backdrop |= softwareRenderer->variantPalette[0];
884 }
885 int end = softwareRenderer->windows[w].endX;
886 for (; x & 3; ++x) {
887 softwareRenderer->row[x] = backdrop;
888 }
889 for (; x < end - 3; x += 4) {
890 softwareRenderer->row[x] = backdrop;
891 softwareRenderer->row[x + 1] = backdrop;
892 softwareRenderer->row[x + 2] = backdrop;
893 softwareRenderer->row[x + 3] = backdrop;
894 }
895 for (; x < end; ++x) {
896 softwareRenderer->row[x] = backdrop;
897 }
898 }
899
900 if (softwareRenderer->blendDirty) {
901 _updatePalettes(softwareRenderer);
902 softwareRenderer->blendDirty = false;
903 }
904}
905
906void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
907 int x, w;
908 if (softwareRenderer->target2Bd) {
909 x = 0;
910 for (w = 0; w < softwareRenderer->nWindows; ++w) {
911 uint32_t backdrop = 0;
912 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
913 backdrop |= softwareRenderer->normalPalette[0];
914 } else {
915 backdrop |= softwareRenderer->variantPalette[0];
916 }
917 int end = softwareRenderer->windows[w].endX;
918 for (; x < end; ++x) {
919 uint32_t color = softwareRenderer->row[x];
920 if (color & FLAG_TARGET_1) {
921 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
922 }
923 }
924 }
925 }
926 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
927 x = 0;
928 for (w = 0; w < softwareRenderer->nWindows; ++w) {
929 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
930 continue;
931 }
932 int end = softwareRenderer->windows[w].endX;
933 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
934 for (; x < end; ++x) {
935 uint32_t color = softwareRenderer->row[x];
936 if ((color & 0xFF000000) == FLAG_REBLEND) {
937 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
938 }
939 }
940 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
941 for (; x < end; ++x) {
942 uint32_t color = softwareRenderer->row[x];
943 if ((color & 0xFF000000) == FLAG_REBLEND) {
944 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
945 }
946 }
947 }
948 }
949 }
950}
951
952int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
953 int w;
954 int spriteLayers = 0;
955 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
956 if (renderer->oamDirty) {
957 renderer->oamMax = GBAVideoRendererCleanOAM(renderer->d.oam->obj, renderer->sprites, renderer->objOffsetY, renderer->masterHeight, renderer->combinedObjSort);
958 renderer->oamDirty = false;
959 }
960 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
961 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
962 int mosaicY = y - (y % mosaicV);
963 int i;
964 for (i = 0; i < renderer->oamMax; ++i) {
965 struct GBAVideoRendererSprite* sprite = &renderer->sprites[i];
966 int localY = y;
967 renderer->end = 0;
968 if ((y < sprite->y && (sprite->endY - 256 < 0 || y >= sprite->endY - 256)) || y >= sprite->endY) {
969 continue;
970 }
971 if (GBAObjAttributesAIsMosaic(sprite->obj.a) && mosaicV > 1) {
972 localY = mosaicY;
973 if (localY < sprite->y && sprite->y < GBA_VIDEO_VERTICAL_PIXELS) {
974 localY = sprite->y;
975 }
976 if (localY >= (sprite->endY & 0xFF)) {
977 localY = sprite->endY - 1;
978 }
979 }
980 for (w = 0; w < renderer->nWindows; ++w) {
981 if (renderer->spriteCyclesRemaining <= 0) {
982 break;
983 }
984 renderer->currentWindow = renderer->windows[w].control;
985 renderer->start = renderer->end;
986 renderer->end = renderer->windows[w].endX;
987 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
988 continue;
989 }
990
991 int drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, sprite->index, localY);
992 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
993 }
994 if (renderer->spriteCyclesRemaining <= 0) {
995 break;
996 }
997 }
998 }
999 return spriteLayers;
1000}
1001
1002static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
1003 int i;
1004 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
1005 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
1006 if (renderer->blendEffect == BLEND_BRIGHTEN) {
1007 for (i = 0; i < 512; ++i) {
1008 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
1009 }
1010 } else if (renderer->blendEffect == BLEND_DARKEN) {
1011 for (i = 0; i < 512; ++i) {
1012 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
1013 }
1014 } else {
1015 for (i = 0; i < 512; ++i) {
1016 renderer->variantPalette[i] = renderer->normalPalette[i];
1017 }
1018 }
1019 unsigned highlightAmount = renderer->d.highlightAmount >> 4;
1020
1021 if (highlightAmount) {
1022 for (i = 0; i < 512; ++i) {
1023 renderer->highlightPalette[i] = _mix(0x10 - highlightAmount, renderer->normalPalette[i], highlightAmount, renderer->d.highlightColor);
1024 renderer->highlightVariantPalette[i] = _mix(0x10 - highlightAmount, renderer->variantPalette[i], highlightAmount, renderer->d.highlightColor);
1025 }
1026 }
1027}