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] |= (1U << (Y & 0x1F))
17#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1U << (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 _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
40
41static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
42static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
43
44void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
45 renderer->d.init = GBAVideoSoftwareRendererInit;
46 renderer->d.reset = GBAVideoSoftwareRendererReset;
47 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
48 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
49 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
50 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
51 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
52 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
53 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
54 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
55 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
56
57 renderer->d.disableBG[0] = false;
58 renderer->d.disableBG[1] = false;
59 renderer->d.disableBG[2] = false;
60 renderer->d.disableBG[3] = false;
61 renderer->d.disableOBJ = false;
62 renderer->tileStride = 0x20;
63 renderer->bitmapStride = 0;
64 renderer->combinedObjSort = false;
65 renderer->masterEnd = GBA_VIDEO_HORIZONTAL_PIXELS;
66 renderer->masterHeight = GBA_VIDEO_VERTICAL_PIXELS;
67 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
68
69 renderer->d.highlightBG[0] = false;
70 renderer->d.highlightBG[1] = false;
71 renderer->d.highlightBG[2] = false;
72 renderer->d.highlightBG[3] = false;
73 int i;
74 for (i = 0; i < 128; ++i) {
75 renderer->d.highlightOBJ[i] = false;
76 }
77 renderer->d.highlightColor = GBA_COLOR_WHITE;
78 renderer->d.highlightAmount = 0;
79
80 renderer->temporaryBuffer = 0;
81}
82
83static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
84 GBAVideoSoftwareRendererReset(renderer);
85
86 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
87
88 int y;
89 for (y = 0; y < softwareRenderer->masterHeight; ++y) {
90 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
91 int x;
92 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
93 row[x] = GBA_COLOR_WHITE;
94 }
95 }
96}
97
98static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
99 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
100 int i;
101
102 softwareRenderer->dispcnt = 0x0080;
103
104 softwareRenderer->target1Obj = 0;
105 softwareRenderer->target1Bd = 0;
106 softwareRenderer->target2Obj = 0;
107 softwareRenderer->target2Bd = 0;
108 softwareRenderer->blendEffect = BLEND_NONE;
109 softwareRenderer->masterBright = 0;
110 softwareRenderer->masterBrightY = 0;
111 for (i = 0; i < 1024; i += 2) {
112 uint16_t entry;
113 LOAD_16(entry, i, softwareRenderer->d.palette);
114 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
115 }
116 softwareRenderer->objExtPalette = NULL;
117 softwareRenderer->objExtVariantPalette = NULL;
118 softwareRenderer->blendDirty = false;
119 _updatePalettes(softwareRenderer);
120
121 softwareRenderer->blda = 0;
122 softwareRenderer->bldb = 0;
123 softwareRenderer->bldy = 0;
124
125 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
126 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
127 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
128 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
129 softwareRenderer->oamDirty = 1;
130 softwareRenderer->oamMax = 0;
131
132 softwareRenderer->mosaic = 0;
133 softwareRenderer->nextY = 0;
134
135 softwareRenderer->objOffsetX = 0;
136 softwareRenderer->objOffsetY = 0;
137
138 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
139 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
140 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
141
142 softwareRenderer->lastHighlightAmount = 0;
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] & (1U << (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 softwareRenderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(softwareRenderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
586 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
587 softwareRenderer->d.vramOBJ[0] = objVramBase;
588 if (softwareRenderer->lastHighlightAmount != softwareRenderer->d.highlightAmount) {
589 softwareRenderer->lastHighlightAmount = softwareRenderer->d.highlightAmount;
590 if (softwareRenderer->lastHighlightAmount) {
591 softwareRenderer->blendDirty = true;
592 }
593 }
594
595 if (softwareRenderer->blendDirty) {
596 _updatePalettes(softwareRenderer);
597 softwareRenderer->blendDirty = false;
598 }
599 softwareRenderer->forceTarget1 = false;
600
601 softwareRenderer->bg[0].highlight = softwareRenderer->d.highlightBG[0];
602 softwareRenderer->bg[1].highlight = softwareRenderer->d.highlightBG[1];
603 softwareRenderer->bg[2].highlight = softwareRenderer->d.highlightBG[2];
604 softwareRenderer->bg[3].highlight = softwareRenderer->d.highlightBG[3];
605
606 int w;
607 unsigned priority;
608 for (priority = 0; priority < 4; ++priority) {
609 softwareRenderer->end = 0;
610 for (w = 0; w < softwareRenderer->nWindows; ++w) {
611 softwareRenderer->start = softwareRenderer->end;
612 softwareRenderer->end = softwareRenderer->windows[w].endX;
613 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
614 if (spriteLayers & (1 << priority)) {
615 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
616 }
617 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
618 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
619 }
620 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
621 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
622 }
623 if (TEST_LAYER_ENABLED(2)) {
624 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
625 case 0:
626 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
627 break;
628 case 1:
629 case 2:
630 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
631 break;
632 case 3:
633 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
634 break;
635 case 4:
636 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
637 break;
638 case 5:
639 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
640 break;
641 }
642 }
643 if (TEST_LAYER_ENABLED(3)) {
644 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
645 case 0:
646 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
647 break;
648 case 2:
649 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
650 break;
651 }
652 }
653 }
654 }
655 if (softwareRenderer->forceTarget1 && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
656 uint32_t mask = FLAG_REBLEND | FLAG_IS_BACKGROUND;
657 uint32_t match = FLAG_REBLEND;
658 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
659 mask |= FLAG_OBJWIN;
660 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
661 match |= FLAG_OBJWIN;
662 }
663 }
664 int x = 0;
665 for (w = 0; w < softwareRenderer->nWindows; ++w) {
666 int end = softwareRenderer->windows[w].endX;
667 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
668 x = end;
669 continue;
670 }
671 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
672 for (; x < end; ++x) {
673 uint32_t color = softwareRenderer->row[x];
674 if ((color & mask) == match) {
675 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
676 }
677 }
678 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
679 for (; x < end; ++x) {
680 uint32_t color = softwareRenderer->row[x];
681 if ((color & mask) == match) {
682 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
683 }
684 }
685 }
686 }
687 }
688 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
689 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
690 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
691 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
692 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
693 }
694
695 if (softwareRenderer->bg[0].enabled > 0 && softwareRenderer->bg[0].enabled < 3) {
696 ++softwareRenderer->bg[0].enabled;
697 DIRTY_SCANLINE(softwareRenderer, y);
698 }
699 if (softwareRenderer->bg[1].enabled > 0 && softwareRenderer->bg[1].enabled < 3) {
700 ++softwareRenderer->bg[1].enabled;
701 DIRTY_SCANLINE(softwareRenderer, y);
702 }
703 if (softwareRenderer->bg[2].enabled > 0 && softwareRenderer->bg[2].enabled < 3) {
704 ++softwareRenderer->bg[2].enabled;
705 DIRTY_SCANLINE(softwareRenderer, y);
706 }
707 if (softwareRenderer->bg[3].enabled > 0 && softwareRenderer->bg[3].enabled < 3) {
708 ++softwareRenderer->bg[3].enabled;
709 DIRTY_SCANLINE(softwareRenderer, y);
710 }
711
712 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
713
714#ifdef COLOR_16_BIT
715 size_t x;
716 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
717 row[x] = softwareRenderer->row[x];
718 row[x + 1] = softwareRenderer->row[x + 1];
719 row[x + 2] = softwareRenderer->row[x + 2];
720 row[x + 3] = softwareRenderer->row[x + 3];
721 }
722#else
723 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
724#endif
725}
726
727static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
728 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
729
730 softwareRenderer->nextY = 0;
731 if (softwareRenderer->temporaryBuffer) {
732 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
733 softwareRenderer->temporaryBuffer = 0;
734 }
735 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
736 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
737 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
738 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
739
740 if (softwareRenderer->bg[0].enabled > 0) {
741 softwareRenderer->bg[0].enabled = 3;
742 }
743 if (softwareRenderer->bg[1].enabled > 0) {
744 softwareRenderer->bg[1].enabled = 3;
745 }
746 if (softwareRenderer->bg[2].enabled > 0) {
747 softwareRenderer->bg[2].enabled = 3;
748 }
749 if (softwareRenderer->bg[3].enabled > 0) {
750 softwareRenderer->bg[3].enabled = 3;
751 }
752}
753
754static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
755 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
756 *stride = softwareRenderer->outputBufferStride;
757 *pixels = softwareRenderer->outputBuffer;
758}
759
760static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
761 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
762
763 const color_t* colorPixels = pixels;
764 int i;
765 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
766 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
767 }
768}
769
770static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
771 int wasActive = renderer->bg[bg].enabled;
772 if (!active) {
773 renderer->bg[bg].enabled = 0;
774 } else if (!wasActive && active) {
775 if (renderer->nextY == 0 || GBARegisterDISPCNTGetMode(renderer->dispcnt) > 2) {
776 // TODO: Investigate in more depth how switching background works in different modes
777 renderer->bg[bg].enabled = 3;
778 } else {
779 renderer->bg[bg].enabled = 1;
780 }
781 }
782}
783
784static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
785 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
786 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
787 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
788 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
789}
790
791static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
792 UNUSED(renderer);
793 bg->priority = GBARegisterBGCNTGetPriority(value);
794 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
795 bg->charBase &= 0xC000;
796 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
797 bg->multipalette = GBARegisterBGCNTGet256Color(value);
798 bg->screenBase &= ~0xF800;
799 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
800 bg->overflow = GBARegisterBGCNTGetOverflow(value);
801 bg->size = GBARegisterBGCNTGetSize(value);
802 bg->control = value;
803 bg->yCache = -1;
804}
805
806static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
807 bg->refx = (bg->refx & 0xFFFF0000) | value;
808 bg->sx = bg->refx;
809}
810
811static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
812 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
813 bg->refx <<= 4;
814 bg->refx >>= 4;
815 bg->sx = bg->refx;
816}
817
818static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
819 bg->refy = (bg->refy & 0xFFFF0000) | value;
820 bg->sy = bg->refy;
821}
822
823static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
824 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
825 bg->refy <<= 4;
826 bg->refy >>= 4;
827 bg->sy = bg->refy;
828}
829
830static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
831 enum GBAVideoBlendEffect oldEffect = renderer->blendEffect;
832
833 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
834 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
835 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
836 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
837 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
838 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
839 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
840 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
841
842 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
843 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
844 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
845 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
846 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
847
848 if (oldEffect != renderer->blendEffect) {
849 renderer->blendDirty = true;
850 }
851}
852
853void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
854 int x;
855 int masterEnd = softwareRenderer->masterEnd;
856 for (x = 0; x < masterEnd; x += 4) {
857 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
858 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
859 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
860 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
861 }
862
863 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
864 softwareRenderer->nWindows = 1;
865 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
866 softwareRenderer->windows[0].control = softwareRenderer->winout;
867 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
868 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
869 }
870 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
871 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
872 }
873 } else {
874 softwareRenderer->windows[0].control.packed = 0xFF;
875 }
876
877 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
878
879 if (softwareRenderer->blendDirty) {
880 _updatePalettes(softwareRenderer);
881 softwareRenderer->blendDirty = false;
882 }
883
884 int w;
885 x = 0;
886 for (w = 0; w < softwareRenderer->nWindows; ++w) {
887 // TOOD: handle objwin on backdrop
888 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
889 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
890 backdrop |= softwareRenderer->normalPalette[0];
891 } else {
892 backdrop |= softwareRenderer->variantPalette[0];
893 }
894 int end = softwareRenderer->windows[w].endX;
895 for (; x & 3; ++x) {
896 softwareRenderer->row[x] = backdrop;
897 }
898 for (; x < end - 3; x += 4) {
899 softwareRenderer->row[x] = backdrop;
900 softwareRenderer->row[x + 1] = backdrop;
901 softwareRenderer->row[x + 2] = backdrop;
902 softwareRenderer->row[x + 3] = backdrop;
903 }
904 for (; x < end; ++x) {
905 softwareRenderer->row[x] = backdrop;
906 }
907 }
908}
909
910void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
911 int x, w;
912 if (softwareRenderer->target2Bd) {
913 x = 0;
914 for (w = 0; w < softwareRenderer->nWindows; ++w) {
915 uint32_t backdrop = 0;
916 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
917 backdrop |= softwareRenderer->normalPalette[0];
918 } else {
919 backdrop |= softwareRenderer->variantPalette[0];
920 }
921 int end = softwareRenderer->windows[w].endX;
922 for (; x < end; ++x) {
923 uint32_t color = softwareRenderer->row[x];
924 if (color & FLAG_TARGET_1) {
925 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
926 }
927 }
928 }
929 }
930 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
931 x = 0;
932 for (w = 0; w < softwareRenderer->nWindows; ++w) {
933 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
934 continue;
935 }
936 int end = softwareRenderer->windows[w].endX;
937 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
938 for (; x < end; ++x) {
939 uint32_t color = softwareRenderer->row[x];
940 if ((color & 0xFF000000) == FLAG_REBLEND) {
941 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
942 }
943 }
944 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
945 for (; x < end; ++x) {
946 uint32_t color = softwareRenderer->row[x];
947 if ((color & 0xFF000000) == FLAG_REBLEND) {
948 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
949 }
950 }
951 }
952 }
953 }
954}
955
956int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
957 int w;
958 int spriteLayers = 0;
959 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
960 if (renderer->oamDirty) {
961 renderer->oamMax = GBAVideoRendererCleanOAM(renderer->d.oam->obj, renderer->sprites, renderer->objOffsetY, renderer->masterHeight, renderer->combinedObjSort);
962 renderer->oamDirty = false;
963 }
964 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
965 int mosaicY = y - (y % mosaicV);
966 int i;
967 for (i = 0; i < renderer->oamMax; ++i) {
968 struct GBAVideoRendererSprite* sprite = &renderer->sprites[i];
969 int localY = y;
970 renderer->end = 0;
971 if ((y < sprite->y && (sprite->endY - 256 < 0 || y >= sprite->endY - 256)) || y >= sprite->endY) {
972 continue;
973 }
974 if (GBAObjAttributesAIsMosaic(sprite->obj.a) && mosaicV > 1) {
975 localY = mosaicY;
976 if (localY < sprite->y && sprite->y < GBA_VIDEO_VERTICAL_PIXELS) {
977 localY = sprite->y;
978 }
979 if (localY >= (sprite->endY & 0xFF)) {
980 localY = sprite->endY - 1;
981 }
982 }
983 for (w = 0; w < renderer->nWindows; ++w) {
984 renderer->currentWindow = renderer->windows[w].control;
985 renderer->start = renderer->end;
986 renderer->end = renderer->windows[w].endX;
987 // TODO: partial sprite drawing
988 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
989 continue;
990 }
991
992 int drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, sprite->index, localY);
993 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
994 }
995 renderer->spriteCyclesRemaining -= sprite->cycles;
996 if (renderer->spriteCyclesRemaining <= 0) {
997 break;
998 }
999 }
1000 }
1001 return spriteLayers;
1002}
1003
1004static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
1005 int i;
1006 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
1007 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
1008 if (renderer->blendEffect == BLEND_BRIGHTEN) {
1009 for (i = 0; i < 512; ++i) {
1010 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
1011 }
1012 } else if (renderer->blendEffect == BLEND_DARKEN) {
1013 for (i = 0; i < 512; ++i) {
1014 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
1015 }
1016 } else {
1017 for (i = 0; i < 512; ++i) {
1018 renderer->variantPalette[i] = renderer->normalPalette[i];
1019 }
1020 }
1021 unsigned highlightAmount = renderer->d.highlightAmount >> 4;
1022
1023 if (highlightAmount) {
1024 for (i = 0; i < 512; ++i) {
1025 renderer->highlightPalette[i] = _mix(0x10 - highlightAmount, renderer->normalPalette[i], highlightAmount, renderer->d.highlightColor);
1026 renderer->highlightVariantPalette[i] = _mix(0x10 - highlightAmount, renderer->variantPalette[i], highlightAmount, renderer->d.highlightColor);
1027 }
1028 }
1029}