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/memory.h>
14
15#define DIRTY_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] |= (1U << (Y & 0x1F))
16#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1U << (Y & 0x1F))
17
18static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
19static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
20static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
21static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
22static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
23static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
24static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
25static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
26static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
27static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
28static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
29
30static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
31static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
37
38static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
39
40static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
41
42static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
43static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
44
45void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
46 renderer->d.init = GBAVideoSoftwareRendererInit;
47 renderer->d.reset = GBAVideoSoftwareRendererReset;
48 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
49 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
50 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
51 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
52 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
53 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
54 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
55 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
56 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
57
58 renderer->d.disableBG[0] = false;
59 renderer->d.disableBG[1] = false;
60 renderer->d.disableBG[2] = false;
61 renderer->d.disableBG[3] = false;
62 renderer->d.disableOBJ = false;
63 renderer->d.disableWIN[0] = false;
64 renderer->d.disableWIN[1] = false;
65 renderer->d.disableOBJWIN = false;
66
67 renderer->d.highlightBG[0] = false;
68 renderer->d.highlightBG[1] = false;
69 renderer->d.highlightBG[2] = false;
70 renderer->d.highlightBG[3] = false;
71 int i;
72 for (i = 0; i < 128; ++i) {
73 renderer->d.highlightOBJ[i] = false;
74 }
75 renderer->d.highlightColor = M_COLOR_WHITE;
76 renderer->d.highlightAmount = 0;
77
78 renderer->temporaryBuffer = 0;
79}
80
81static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
82 GBAVideoSoftwareRendererReset(renderer);
83
84 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
85
86 int y;
87 for (y = 0; y < GBA_VIDEO_VERTICAL_PIXELS; ++y) {
88 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
89 int x;
90 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; ++x) {
91 row[x] = M_COLOR_WHITE;
92 }
93 }
94}
95
96static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
97 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
98 int i;
99
100 softwareRenderer->dispcnt = 0x0080;
101
102 softwareRenderer->target1Obj = 0;
103 softwareRenderer->target1Bd = 0;
104 softwareRenderer->target2Obj = 0;
105 softwareRenderer->target2Bd = 0;
106 softwareRenderer->blendEffect = BLEND_NONE;
107 for (i = 0; i < 1024; i += 2) {
108 uint16_t entry;
109 LOAD_16(entry, i, softwareRenderer->d.palette);
110 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
111 }
112 softwareRenderer->blendDirty = false;
113 _updatePalettes(softwareRenderer);
114
115 softwareRenderer->blda = 0;
116 softwareRenderer->bldb = 0;
117 softwareRenderer->bldy = 0;
118
119 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
120 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
121 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
122 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
123 softwareRenderer->oamDirty = 1;
124 softwareRenderer->oamMax = 0;
125
126 softwareRenderer->mosaic = 0;
127 softwareRenderer->greenswap = false;
128 softwareRenderer->nextY = 0;
129
130 softwareRenderer->objOffsetX = 0;
131 softwareRenderer->objOffsetY = 0;
132
133 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
134 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
135 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
136
137 softwareRenderer->lastHighlightAmount = 0;
138
139 for (i = 0; i < 4; ++i) {
140 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
141 bg->index = i;
142 bg->enabled = 0;
143 bg->priority = 0;
144 bg->charBase = 0;
145 bg->mosaic = 0;
146 bg->multipalette = 0;
147 bg->screenBase = 0;
148 bg->overflow = 0;
149 bg->size = 0;
150 bg->target1 = 0;
151 bg->target2 = 0;
152 bg->x = 0;
153 bg->y = 0;
154 bg->refx = 0;
155 bg->refy = 0;
156 bg->dx = 256;
157 bg->dmx = 0;
158 bg->dy = 0;
159 bg->dmy = 256;
160 bg->sx = 0;
161 bg->sy = 0;
162 bg->yCache = -1;
163 bg->offsetX = 0;
164 bg->offsetY = 0;
165 }
166}
167
168static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
169 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
170 UNUSED(softwareRenderer);
171}
172
173static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
174 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
175 if (renderer->cache) {
176 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
177 }
178
179 switch (address) {
180 case REG_DISPCNT:
181 value &= 0xFFF7;
182 softwareRenderer->dispcnt = value;
183 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
184 break;
185 case REG_GREENSWP:
186 softwareRenderer->greenswap = value & 1;
187 break;
188 case REG_BG0CNT:
189 value &= 0xDFFF;
190 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
191 break;
192 case REG_BG1CNT:
193 value &= 0xDFFF;
194 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
195 break;
196 case REG_BG2CNT:
197 value &= 0xFFFF;
198 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
199 break;
200 case REG_BG3CNT:
201 value &= 0xFFFF;
202 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
203 break;
204 case REG_BG0HOFS:
205 value &= 0x01FF;
206 softwareRenderer->bg[0].x = value;
207 break;
208 case REG_BG0VOFS:
209 value &= 0x01FF;
210 softwareRenderer->bg[0].y = value;
211 break;
212 case REG_BG1HOFS:
213 value &= 0x01FF;
214 softwareRenderer->bg[1].x = value;
215 break;
216 case REG_BG1VOFS:
217 value &= 0x01FF;
218 softwareRenderer->bg[1].y = value;
219 break;
220 case REG_BG2HOFS:
221 value &= 0x01FF;
222 softwareRenderer->bg[2].x = value;
223 break;
224 case REG_BG2VOFS:
225 value &= 0x01FF;
226 softwareRenderer->bg[2].y = value;
227 break;
228 case REG_BG3HOFS:
229 value &= 0x01FF;
230 softwareRenderer->bg[3].x = value;
231 break;
232 case REG_BG3VOFS:
233 value &= 0x01FF;
234 softwareRenderer->bg[3].y = value;
235 break;
236 case REG_BG2PA:
237 softwareRenderer->bg[2].dx = value;
238 break;
239 case REG_BG2PB:
240 softwareRenderer->bg[2].dmx = value;
241 break;
242 case REG_BG2PC:
243 softwareRenderer->bg[2].dy = value;
244 break;
245 case REG_BG2PD:
246 softwareRenderer->bg[2].dmy = value;
247 break;
248 case REG_BG2X_LO:
249 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
250 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
251 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
252 }
253 break;
254 case REG_BG2X_HI:
255 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
256 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
257 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
258 }
259 break;
260 case REG_BG2Y_LO:
261 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
262 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
263 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
264 }
265 break;
266 case REG_BG2Y_HI:
267 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
268 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
269 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
270 }
271 break;
272 case REG_BG3PA:
273 softwareRenderer->bg[3].dx = value;
274 break;
275 case REG_BG3PB:
276 softwareRenderer->bg[3].dmx = value;
277 break;
278 case REG_BG3PC:
279 softwareRenderer->bg[3].dy = value;
280 break;
281 case REG_BG3PD:
282 softwareRenderer->bg[3].dmy = value;
283 break;
284 case REG_BG3X_LO:
285 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
286 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
287 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
288 }
289 break;
290 case REG_BG3X_HI:
291 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
292 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
293 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
294 }
295 break;
296 case REG_BG3Y_LO:
297 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
298 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
299 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
300 }
301 break;
302 case REG_BG3Y_HI:
303 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
304 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
305 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
306 }
307 break;
308 case REG_BLDCNT:
309 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
310 value &= 0x3FFF;
311 break;
312 case REG_BLDALPHA:
313 softwareRenderer->blda = value & 0x1F;
314 if (softwareRenderer->blda > 0x10) {
315 softwareRenderer->blda = 0x10;
316 }
317 softwareRenderer->bldb = (value >> 8) & 0x1F;
318 if (softwareRenderer->bldb > 0x10) {
319 softwareRenderer->bldb = 0x10;
320 }
321 value &= 0x1F1F;
322 break;
323 case REG_BLDY:
324 value &= 0x1F;
325 if (value > 0x10) {
326 value = 0x10;
327 }
328 if (softwareRenderer->bldy != value) {
329 softwareRenderer->bldy = value;
330 softwareRenderer->blendDirty = true;
331 }
332 break;
333 case REG_WIN0H:
334 softwareRenderer->winN[0].h.end = value;
335 softwareRenderer->winN[0].h.start = value >> 8;
336 if (softwareRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
337 softwareRenderer->winN[0].h.start = 0;
338 }
339 if (softwareRenderer->winN[0].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
340 softwareRenderer->winN[0].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
341 if (softwareRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
342 softwareRenderer->winN[0].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
343 }
344 }
345 break;
346 case REG_WIN1H:
347 softwareRenderer->winN[1].h.end = value;
348 softwareRenderer->winN[1].h.start = value >> 8;
349 if (softwareRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
350 softwareRenderer->winN[1].h.start = 0;
351 }
352 if (softwareRenderer->winN[1].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
353 softwareRenderer->winN[1].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
354 if (softwareRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
355 softwareRenderer->winN[1].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
356 }
357 }
358 break;
359 case REG_WIN0V:
360 softwareRenderer->winN[0].v.end = value;
361 softwareRenderer->winN[0].v.start = value >> 8;
362 if (softwareRenderer->winN[0].v.start > GBA_VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
363 softwareRenderer->winN[0].v.start = 0;
364 }
365 if (softwareRenderer->winN[0].v.end > GBA_VIDEO_VERTICAL_PIXELS) {
366 softwareRenderer->winN[0].v.end = GBA_VIDEO_VERTICAL_PIXELS;
367 if (softwareRenderer->winN[0].v.start > GBA_VIDEO_VERTICAL_PIXELS) {
368 softwareRenderer->winN[0].v.start = GBA_VIDEO_VERTICAL_PIXELS;
369 }
370 }
371 break;
372 case REG_WIN1V:
373 softwareRenderer->winN[1].v.end = value;
374 softwareRenderer->winN[1].v.start = value >> 8;
375 if (softwareRenderer->winN[1].v.start > GBA_VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
376 softwareRenderer->winN[1].v.start = 0;
377 }
378 if (softwareRenderer->winN[1].v.end > GBA_VIDEO_VERTICAL_PIXELS) {
379 softwareRenderer->winN[1].v.end = GBA_VIDEO_VERTICAL_PIXELS;
380 if (softwareRenderer->winN[1].v.start > GBA_VIDEO_VERTICAL_PIXELS) {
381 softwareRenderer->winN[1].v.start = GBA_VIDEO_VERTICAL_PIXELS;
382 }
383 }
384 break;
385 case REG_WININ:
386 value &= 0x3F3F;
387 softwareRenderer->winN[0].control.packed = value;
388 softwareRenderer->winN[1].control.packed = value >> 8;
389 break;
390 case REG_WINOUT:
391 value &= 0x3F3F;
392 softwareRenderer->winout.packed = value;
393 softwareRenderer->objwin.packed = value >> 8;
394 break;
395 case REG_MOSAIC:
396 softwareRenderer->mosaic = value;
397 break;
398 default:
399 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
400 }
401 softwareRenderer->nextIo[address >> 1] = value;
402 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
403 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
404 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
405 }
406 return value;
407}
408
409static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
410 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
411 if (renderer->cache) {
412 mCacheSetWriteVRAM(renderer->cache, address);
413 }
414 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
415 softwareRenderer->bg[0].yCache = -1;
416 softwareRenderer->bg[1].yCache = -1;
417 softwareRenderer->bg[2].yCache = -1;
418 softwareRenderer->bg[3].yCache = -1;
419}
420
421static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
422 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
423 UNUSED(oam);
424 softwareRenderer->oamDirty = 1;
425 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
426}
427
428static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
429 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
430 color_t color = mColorFrom555(value);
431 softwareRenderer->normalPalette[address >> 1] = color;
432 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
433 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
434 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
435 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
436 }
437 if (renderer->cache) {
438 mCacheSetWritePalette(renderer->cache, address >> 1, color);
439 }
440 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
441}
442
443static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
444 if (win->v.end >= win->v.start) {
445 if (y >= win->v.end + win->offsetY) {
446 return;
447 }
448 if (y < win->v.start + win->offsetY) {
449 return;
450 }
451 } else if (y >= win->v.end + win->offsetY && y < win->v.start + win->offsetY) {
452 return;
453 }
454 if (win->h.end > GBA_VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
455 struct WindowN splits[2] = { *win, *win };
456 splits[0].h.start = 0;
457 splits[1].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
458 _breakWindowInner(softwareRenderer, &splits[0]);
459 _breakWindowInner(softwareRenderer, &splits[1]);
460 } else {
461 _breakWindowInner(softwareRenderer, win);
462 }
463}
464
465static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
466 int activeWindow;
467 int startX = 0;
468 if (win->h.end > 0) {
469 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
470 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
471 // Insert a window before the end of the active window
472 struct Window oldWindow = softwareRenderer->windows[activeWindow];
473 if (win->h.start > startX) {
474 // And after the start of the active window
475 int nextWindow = softwareRenderer->nWindows;
476 ++softwareRenderer->nWindows;
477 for (; nextWindow > activeWindow; --nextWindow) {
478 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
479 }
480 softwareRenderer->windows[activeWindow].endX = win->h.start;
481 ++activeWindow;
482 }
483 softwareRenderer->windows[activeWindow].control = win->control;
484 softwareRenderer->windows[activeWindow].endX = win->h.end;
485 if (win->h.end >= oldWindow.endX) {
486 // Trim off extra windows we've overwritten
487 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
488 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
489 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
490 return;
491 }
492 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
493 --softwareRenderer->nWindows;
494 }
495 } else {
496 ++activeWindow;
497 int nextWindow = softwareRenderer->nWindows;
498 ++softwareRenderer->nWindows;
499 for (; nextWindow > activeWindow; --nextWindow) {
500 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
501 }
502 softwareRenderer->windows[activeWindow] = oldWindow;
503 }
504 break;
505 }
506 startX = softwareRenderer->windows[activeWindow].endX;
507 }
508 }
509#ifdef DEBUG
510 if (softwareRenderer->nWindows > MAX_WINDOW) {
511 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
512 }
513#endif
514}
515
516static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
517 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
518
519 if (y == GBA_VIDEO_VERTICAL_PIXELS - 1) {
520 softwareRenderer->nextY = 0;
521 } else {
522 softwareRenderer->nextY = y + 1;
523 }
524
525 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1U << (y & 0x1F));
526 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
527 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
528 dirty = true;
529 }
530
531 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
532 if (softwareRenderer->cache[y].scale[0][0] != softwareRenderer->bg[2].sx ||
533 softwareRenderer->cache[y].scale[0][1] != softwareRenderer->bg[2].sy ||
534 softwareRenderer->cache[y].scale[1][0] != softwareRenderer->bg[3].sx ||
535 softwareRenderer->cache[y].scale[1][1] != softwareRenderer->bg[3].sy) {
536 dirty = true;
537 }
538 }
539 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
540 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
541 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
542 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
543
544 if (!dirty) {
545 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
546 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
547 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
548 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
549 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
550 }
551 return;
552 }
553
554 CLEAN_SCANLINE(softwareRenderer, y);
555
556 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
557 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
558 int x;
559 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; ++x) {
560 row[x] = M_COLOR_WHITE;
561 }
562 return;
563 }
564
565 int x;
566 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
567 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
568 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
569 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
570 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
571 }
572
573 softwareRenderer->windows[0].endX = GBA_VIDEO_HORIZONTAL_PIXELS;
574 softwareRenderer->nWindows = 1;
575 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
576 softwareRenderer->windows[0].control = softwareRenderer->winout;
577 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) && !renderer->disableWIN[1]) {
578 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
579 }
580 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) && !renderer->disableWIN[0]) {
581 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
582 }
583 } else {
584 softwareRenderer->windows[0].control.packed = 0xFF;
585 }
586
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 softwareRenderer->forceTarget1 = false;
599
600 int w;
601 x = 0;
602 for (w = 0; w < softwareRenderer->nWindows; ++w) {
603 // TOOD: handle objwin on backdrop
604 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
605 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
606 backdrop |= softwareRenderer->normalPalette[0];
607 } else {
608 backdrop |= softwareRenderer->variantPalette[0];
609 }
610 int end = softwareRenderer->windows[w].endX;
611 for (; x < end - 3; x += 4) {
612 softwareRenderer->row[x] = backdrop;
613 softwareRenderer->row[x + 1] = backdrop;
614 softwareRenderer->row[x + 2] = backdrop;
615 softwareRenderer->row[x + 3] = backdrop;
616 }
617 for (; x < end; ++x) {
618 softwareRenderer->row[x] = backdrop;
619 }
620 }
621
622 softwareRenderer->bg[0].highlight = softwareRenderer->d.highlightBG[0];
623 softwareRenderer->bg[1].highlight = softwareRenderer->d.highlightBG[1];
624 softwareRenderer->bg[2].highlight = softwareRenderer->d.highlightBG[2];
625 softwareRenderer->bg[3].highlight = softwareRenderer->d.highlightBG[3];
626
627 _drawScanline(softwareRenderer, y);
628
629 if ((softwareRenderer->forceTarget1 || softwareRenderer->bg[0].target1 || softwareRenderer->bg[1].target1 || softwareRenderer->bg[2].target1 || softwareRenderer->bg[3].target1) && softwareRenderer->target2Bd) {
630 x = 0;
631 for (w = 0; w < softwareRenderer->nWindows; ++w) {
632 uint32_t backdrop = 0;
633 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
634 backdrop |= softwareRenderer->normalPalette[0];
635 } else {
636 backdrop |= softwareRenderer->variantPalette[0];
637 }
638 int end = softwareRenderer->windows[w].endX;
639 for (; x < end; ++x) {
640 uint32_t color = softwareRenderer->row[x];
641 if (color & FLAG_TARGET_1) {
642 softwareRenderer->row[x] = mColorMix5Bit(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
643 }
644 }
645 }
646 }
647 if (softwareRenderer->forceTarget1 && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
648 x = 0;
649 for (w = 0; w < softwareRenderer->nWindows; ++w) {
650 int end = softwareRenderer->windows[w].endX;
651 uint32_t mask = FLAG_REBLEND | FLAG_IS_BACKGROUND;
652 uint32_t match = FLAG_REBLEND;
653 bool objBlend = GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed);
654 bool winBlend = GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed);
655 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt) && objBlend != winBlend) {
656 mask |= FLAG_OBJWIN;
657 if (objBlend) {
658 match |= FLAG_OBJWIN;
659 }
660 } else if (!winBlend) {
661 x = end;
662 continue;
663 }
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
682 if (softwareRenderer->greenswap) {
683 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
684 row[x] = softwareRenderer->row[x] & (M_COLOR_RED | M_COLOR_BLUE);
685 row[x] |= softwareRenderer->row[x + 1] & M_COLOR_GREEN;
686 row[x + 1] = softwareRenderer->row[x + 1] & (M_COLOR_RED | M_COLOR_BLUE);
687 row[x + 1] |= softwareRenderer->row[x] & M_COLOR_GREEN;
688 row[x + 2] = softwareRenderer->row[x + 2] & (M_COLOR_RED | M_COLOR_BLUE);
689 row[x + 2] |= softwareRenderer->row[x + 3] & M_COLOR_GREEN;
690 row[x + 3] = softwareRenderer->row[x + 3] & (M_COLOR_RED | M_COLOR_BLUE);
691 row[x + 3] |= softwareRenderer->row[x + 2] & M_COLOR_GREEN;
692
693 }
694 } else {
695#ifdef COLOR_16_BIT
696 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
697 row[x] = softwareRenderer->row[x];
698 row[x + 1] = softwareRenderer->row[x + 1];
699 row[x + 2] = softwareRenderer->row[x + 2];
700 row[x + 3] = softwareRenderer->row[x + 3];
701 }
702#else
703 memcpy(row, softwareRenderer->row, GBA_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
704#endif
705 }
706}
707
708static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
709 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
710
711 softwareRenderer->nextY = 0;
712 if (softwareRenderer->temporaryBuffer) {
713 mappedMemoryFree(softwareRenderer->temporaryBuffer, GBA_VIDEO_HORIZONTAL_PIXELS * GBA_VIDEO_VERTICAL_PIXELS * 4);
714 softwareRenderer->temporaryBuffer = 0;
715 }
716 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
717 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
718 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
719 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
720
721 if (softwareRenderer->bg[0].enabled > 0) {
722 softwareRenderer->bg[0].enabled = 3;
723 }
724 if (softwareRenderer->bg[1].enabled > 0) {
725 softwareRenderer->bg[1].enabled = 3;
726 }
727 if (softwareRenderer->bg[2].enabled > 0) {
728 softwareRenderer->bg[2].enabled = 3;
729 }
730 if (softwareRenderer->bg[3].enabled > 0) {
731 softwareRenderer->bg[3].enabled = 3;
732 }
733}
734
735static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
736 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
737 *stride = softwareRenderer->outputBufferStride;
738 *pixels = softwareRenderer->outputBuffer;
739}
740
741static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
742 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
743
744 const color_t* colorPixels = pixels;
745 unsigned i;
746 for (i = 0; i < GBA_VIDEO_VERTICAL_PIXELS; ++i) {
747 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GBA_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
748 }
749}
750
751static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
752 int wasActive = renderer->bg[bg].enabled;
753 if (!active) {
754 renderer->bg[bg].enabled = 0;
755 } else if (!wasActive && active) {
756 if (renderer->nextY == 0 || GBARegisterDISPCNTGetMode(renderer->dispcnt) > 2) {
757 // TODO: Investigate in more depth how switching background works in different modes
758 renderer->bg[bg].enabled = 3;
759 } else {
760 renderer->bg[bg].enabled = 1;
761 }
762 }
763}
764
765static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
766 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
767 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
768 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
769 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
770}
771
772static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
773 UNUSED(renderer);
774 bg->priority = GBARegisterBGCNTGetPriority(value);
775 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
776 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
777 bg->multipalette = GBARegisterBGCNTGet256Color(value);
778 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
779 bg->overflow = GBARegisterBGCNTGetOverflow(value);
780 bg->size = GBARegisterBGCNTGetSize(value);
781 bg->yCache = -1;
782}
783
784static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
785 bg->refx = (bg->refx & 0xFFFF0000) | value;
786 bg->sx = bg->refx;
787}
788
789static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
790 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
791 bg->refx <<= 4;
792 bg->refx >>= 4;
793 bg->sx = bg->refx;
794}
795
796static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
797 bg->refy = (bg->refy & 0xFFFF0000) | value;
798 bg->sy = bg->refy;
799}
800
801static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
802 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
803 bg->refy <<= 4;
804 bg->refy >>= 4;
805 bg->sy = bg->refy;
806}
807
808static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
809 enum GBAVideoBlendEffect oldEffect = renderer->blendEffect;
810
811 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
812 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
813 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
814 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
815 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
816 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
817 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
818 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
819
820 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
821 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
822 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
823 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
824 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
825
826 if (oldEffect != renderer->blendEffect) {
827 renderer->blendDirty = true;
828 }
829}
830
831#define TEST_LAYER_ENABLED(X) \
832 !renderer->d.disableBG[X] && \
833 (renderer->bg[X].enabled == 3 && \
834 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
835 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
836 renderer->bg[X].priority == priority)
837
838static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
839 int w;
840 int spriteLayers = 0;
841 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
842 if (renderer->oamDirty) {
843 renderer->oamMax = GBAVideoRendererCleanOAM(renderer->d.oam->obj, renderer->sprites, renderer->objOffsetY);
844 renderer->oamDirty = false;
845 }
846 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
847 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
848 int mosaicY = y - (y % mosaicV);
849 int i;
850 for (i = 0; i < renderer->oamMax; ++i) {
851 struct GBAVideoRendererSprite* sprite = &renderer->sprites[i];
852 int localY = y;
853 renderer->end = 0;
854 if ((y < sprite->y && (sprite->endY - 256 < 0 || y >= sprite->endY - 256)) || y >= sprite->endY) {
855 continue;
856 }
857 if (GBAObjAttributesAIsMosaic(sprite->obj.a) && mosaicV > 1) {
858 localY = mosaicY;
859 if (localY < sprite->y && sprite->y < GBA_VIDEO_VERTICAL_PIXELS) {
860 localY = sprite->y;
861 }
862 if (localY >= (sprite->endY & 0xFF)) {
863 localY = sprite->endY - 1;
864 }
865 }
866 for (w = 0; w < renderer->nWindows; ++w) {
867 renderer->currentWindow = renderer->windows[w].control;
868 renderer->start = renderer->end;
869 renderer->end = renderer->windows[w].endX;
870 // TODO: partial sprite drawing
871 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
872 continue;
873 }
874
875 int drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, sprite->index, localY);
876 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
877 }
878 renderer->spriteCyclesRemaining -= sprite->cycles;
879 if (renderer->spriteCyclesRemaining <= 0) {
880 break;
881 }
882 }
883 }
884
885 unsigned priority;
886 for (priority = 0; priority < 4; ++priority) {
887 renderer->end = 0;
888 for (w = 0; w < renderer->nWindows; ++w) {
889 renderer->start = renderer->end;
890 renderer->end = renderer->windows[w].endX;
891 renderer->currentWindow = renderer->windows[w].control;
892 if (spriteLayers & (1 << priority)) {
893 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
894 }
895 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
896 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
897 }
898 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
899 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
900 }
901 if (TEST_LAYER_ENABLED(2)) {
902 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
903 case 0:
904 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
905 break;
906 case 1:
907 case 2:
908 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
909 break;
910 case 3:
911 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
912 break;
913 case 4:
914 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
915 break;
916 case 5:
917 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
918 break;
919 }
920 }
921 if (TEST_LAYER_ENABLED(3)) {
922 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
923 case 0:
924 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
925 break;
926 case 2:
927 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
928 break;
929 }
930 }
931 }
932 }
933 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
934 renderer->bg[2].sx += renderer->bg[2].dmx;
935 renderer->bg[2].sy += renderer->bg[2].dmy;
936 renderer->bg[3].sx += renderer->bg[3].dmx;
937 renderer->bg[3].sy += renderer->bg[3].dmy;
938 }
939
940 if (renderer->bg[0].enabled > 0 && renderer->bg[0].enabled < 3) {
941 ++renderer->bg[0].enabled;
942 DIRTY_SCANLINE(renderer, y);
943 }
944 if (renderer->bg[1].enabled > 0 && renderer->bg[1].enabled < 3) {
945 ++renderer->bg[1].enabled;
946 DIRTY_SCANLINE(renderer, y);
947 }
948 if (renderer->bg[2].enabled > 0 && renderer->bg[2].enabled < 3) {
949 ++renderer->bg[2].enabled;
950 DIRTY_SCANLINE(renderer, y);
951 }
952 if (renderer->bg[3].enabled > 0 && renderer->bg[3].enabled < 3) {
953 ++renderer->bg[3].enabled;
954 DIRTY_SCANLINE(renderer, y);
955 }
956}
957
958static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
959 int i;
960 if (renderer->blendEffect == BLEND_BRIGHTEN) {
961 for (i = 0; i < 512; ++i) {
962 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
963 }
964 } else if (renderer->blendEffect == BLEND_DARKEN) {
965 for (i = 0; i < 512; ++i) {
966 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
967 }
968 } else {
969 for (i = 0; i < 512; ++i) {
970 renderer->variantPalette[i] = renderer->normalPalette[i];
971 }
972 }
973 unsigned highlightAmount = renderer->d.highlightAmount >> 4;
974
975 if (highlightAmount) {
976 for (i = 0; i < 512; ++i) {
977 renderer->highlightPalette[i] = mColorMix5Bit(0x10 - highlightAmount, renderer->normalPalette[i], highlightAmount, renderer->d.highlightColor);
978 renderer->highlightVariantPalette[i] = mColorMix5Bit(0x10 - highlightAmount, renderer->variantPalette[i], highlightAmount, renderer->d.highlightColor);
979 }
980 }
981}