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 _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->d.disableWIN[0] = false;
65 renderer->d.disableWIN[1] = false;
66 renderer->d.disableOBJWIN = false;
67
68 renderer->d.highlightBG[0] = false;
69 renderer->d.highlightBG[1] = false;
70 renderer->d.highlightBG[2] = false;
71 renderer->d.highlightBG[3] = false;
72 int i;
73 for (i = 0; i < 128; ++i) {
74 renderer->d.highlightOBJ[i] = false;
75 }
76 renderer->d.highlightColor = M_COLOR_WHITE;
77 renderer->d.highlightAmount = 0;
78
79 renderer->temporaryBuffer = 0;
80}
81
82static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
83 GBAVideoSoftwareRendererReset(renderer);
84
85 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
86
87 int y;
88 for (y = 0; y < GBA_VIDEO_VERTICAL_PIXELS; ++y) {
89 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
90 int x;
91 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; ++x) {
92 row[x] = M_COLOR_WHITE;
93 }
94 }
95}
96
97static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
98 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
99 int i;
100
101 softwareRenderer->dispcnt = 0x0080;
102
103 softwareRenderer->target1Obj = 0;
104 softwareRenderer->target1Bd = 0;
105 softwareRenderer->target2Obj = 0;
106 softwareRenderer->target2Bd = 0;
107 softwareRenderer->blendEffect = BLEND_NONE;
108 for (i = 0; i < 1024; i += 2) {
109 uint16_t entry;
110 LOAD_16(entry, i, softwareRenderer->d.palette);
111 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
112 }
113 softwareRenderer->blendDirty = false;
114 _updatePalettes(softwareRenderer);
115
116 softwareRenderer->blda = 0;
117 softwareRenderer->bldb = 0;
118 softwareRenderer->bldy = 0;
119
120 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
121 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
122 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
123 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
124 softwareRenderer->oamDirty = 1;
125 softwareRenderer->oamMax = 0;
126
127 softwareRenderer->mosaic = 0;
128 softwareRenderer->greenswap = false;
129 softwareRenderer->nextY = 0;
130
131 softwareRenderer->objOffsetX = 0;
132 softwareRenderer->objOffsetY = 0;
133
134 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
135 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
136 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
137
138 softwareRenderer->lastHighlightAmount = 0;
139
140 for (i = 0; i < 4; ++i) {
141 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
142 bg->index = i;
143 bg->enabled = 0;
144 bg->priority = 0;
145 bg->charBase = 0;
146 bg->mosaic = 0;
147 bg->multipalette = 0;
148 bg->screenBase = 0;
149 bg->overflow = 0;
150 bg->size = 0;
151 bg->target1 = 0;
152 bg->target2 = 0;
153 bg->x = 0;
154 bg->y = 0;
155 bg->refx = 0;
156 bg->refy = 0;
157 bg->dx = 256;
158 bg->dmx = 0;
159 bg->dy = 0;
160 bg->dmy = 256;
161 bg->sx = 0;
162 bg->sy = 0;
163 bg->yCache = -1;
164 bg->offsetX = 0;
165 bg->offsetY = 0;
166 }
167}
168
169static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
170 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
171 UNUSED(softwareRenderer);
172}
173
174static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
175 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
176 if (renderer->cache) {
177 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
178 }
179
180 switch (address) {
181 case REG_DISPCNT:
182 value &= 0xFFF7;
183 softwareRenderer->dispcnt = value;
184 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
185 break;
186 case REG_GREENSWP:
187 softwareRenderer->greenswap = value & 1;
188 break;
189 case REG_BG0CNT:
190 value &= 0xDFFF;
191 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
192 break;
193 case REG_BG1CNT:
194 value &= 0xDFFF;
195 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
196 break;
197 case REG_BG2CNT:
198 value &= 0xFFFF;
199 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
200 break;
201 case REG_BG3CNT:
202 value &= 0xFFFF;
203 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
204 break;
205 case REG_BG0HOFS:
206 value &= 0x01FF;
207 softwareRenderer->bg[0].x = value;
208 break;
209 case REG_BG0VOFS:
210 value &= 0x01FF;
211 softwareRenderer->bg[0].y = value;
212 break;
213 case REG_BG1HOFS:
214 value &= 0x01FF;
215 softwareRenderer->bg[1].x = value;
216 break;
217 case REG_BG1VOFS:
218 value &= 0x01FF;
219 softwareRenderer->bg[1].y = value;
220 break;
221 case REG_BG2HOFS:
222 value &= 0x01FF;
223 softwareRenderer->bg[2].x = value;
224 break;
225 case REG_BG2VOFS:
226 value &= 0x01FF;
227 softwareRenderer->bg[2].y = value;
228 break;
229 case REG_BG3HOFS:
230 value &= 0x01FF;
231 softwareRenderer->bg[3].x = value;
232 break;
233 case REG_BG3VOFS:
234 value &= 0x01FF;
235 softwareRenderer->bg[3].y = value;
236 break;
237 case REG_BG2PA:
238 softwareRenderer->bg[2].dx = value;
239 break;
240 case REG_BG2PB:
241 softwareRenderer->bg[2].dmx = value;
242 break;
243 case REG_BG2PC:
244 softwareRenderer->bg[2].dy = value;
245 break;
246 case REG_BG2PD:
247 softwareRenderer->bg[2].dmy = value;
248 break;
249 case REG_BG2X_LO:
250 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
251 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
252 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
253 }
254 break;
255 case REG_BG2X_HI:
256 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
257 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
258 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
259 }
260 break;
261 case REG_BG2Y_LO:
262 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
263 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
264 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
265 }
266 break;
267 case REG_BG2Y_HI:
268 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
269 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
270 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
271 }
272 break;
273 case REG_BG3PA:
274 softwareRenderer->bg[3].dx = value;
275 break;
276 case REG_BG3PB:
277 softwareRenderer->bg[3].dmx = value;
278 break;
279 case REG_BG3PC:
280 softwareRenderer->bg[3].dy = value;
281 break;
282 case REG_BG3PD:
283 softwareRenderer->bg[3].dmy = value;
284 break;
285 case REG_BG3X_LO:
286 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
287 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
288 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
289 }
290 break;
291 case REG_BG3X_HI:
292 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
293 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
294 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
295 }
296 break;
297 case REG_BG3Y_LO:
298 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
299 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
300 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
301 }
302 break;
303 case REG_BG3Y_HI:
304 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
305 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
306 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
307 }
308 break;
309 case REG_BLDCNT:
310 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
311 value &= 0x3FFF;
312 break;
313 case REG_BLDALPHA:
314 softwareRenderer->blda = value & 0x1F;
315 if (softwareRenderer->blda > 0x10) {
316 softwareRenderer->blda = 0x10;
317 }
318 softwareRenderer->bldb = (value >> 8) & 0x1F;
319 if (softwareRenderer->bldb > 0x10) {
320 softwareRenderer->bldb = 0x10;
321 }
322 value &= 0x1F1F;
323 break;
324 case REG_BLDY:
325 value &= 0x1F;
326 if (value > 0x10) {
327 value = 0x10;
328 }
329 if (softwareRenderer->bldy != value) {
330 softwareRenderer->bldy = value;
331 softwareRenderer->blendDirty = true;
332 }
333 break;
334 case REG_WIN0H:
335 softwareRenderer->winN[0].h.end = value;
336 softwareRenderer->winN[0].h.start = value >> 8;
337 if (softwareRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
338 softwareRenderer->winN[0].h.start = 0;
339 }
340 if (softwareRenderer->winN[0].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
341 softwareRenderer->winN[0].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
342 if (softwareRenderer->winN[0].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
343 softwareRenderer->winN[0].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
344 }
345 }
346 break;
347 case REG_WIN1H:
348 softwareRenderer->winN[1].h.end = value;
349 softwareRenderer->winN[1].h.start = value >> 8;
350 if (softwareRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
351 softwareRenderer->winN[1].h.start = 0;
352 }
353 if (softwareRenderer->winN[1].h.end > GBA_VIDEO_HORIZONTAL_PIXELS) {
354 softwareRenderer->winN[1].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
355 if (softwareRenderer->winN[1].h.start > GBA_VIDEO_HORIZONTAL_PIXELS) {
356 softwareRenderer->winN[1].h.start = GBA_VIDEO_HORIZONTAL_PIXELS;
357 }
358 }
359 break;
360 case REG_WIN0V:
361 softwareRenderer->winN[0].v.end = value;
362 softwareRenderer->winN[0].v.start = value >> 8;
363 if (softwareRenderer->winN[0].v.start > GBA_VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
364 softwareRenderer->winN[0].v.start = 0;
365 }
366 if (softwareRenderer->winN[0].v.end > GBA_VIDEO_VERTICAL_PIXELS) {
367 softwareRenderer->winN[0].v.end = GBA_VIDEO_VERTICAL_PIXELS;
368 if (softwareRenderer->winN[0].v.start > GBA_VIDEO_VERTICAL_PIXELS) {
369 softwareRenderer->winN[0].v.start = GBA_VIDEO_VERTICAL_PIXELS;
370 }
371 }
372 break;
373 case REG_WIN1V:
374 softwareRenderer->winN[1].v.end = value;
375 softwareRenderer->winN[1].v.start = value >> 8;
376 if (softwareRenderer->winN[1].v.start > GBA_VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
377 softwareRenderer->winN[1].v.start = 0;
378 }
379 if (softwareRenderer->winN[1].v.end > GBA_VIDEO_VERTICAL_PIXELS) {
380 softwareRenderer->winN[1].v.end = GBA_VIDEO_VERTICAL_PIXELS;
381 if (softwareRenderer->winN[1].v.start > GBA_VIDEO_VERTICAL_PIXELS) {
382 softwareRenderer->winN[1].v.start = GBA_VIDEO_VERTICAL_PIXELS;
383 }
384 }
385 break;
386 case REG_WININ:
387 value &= 0x3F3F;
388 softwareRenderer->winN[0].control.packed = value;
389 softwareRenderer->winN[1].control.packed = value >> 8;
390 break;
391 case REG_WINOUT:
392 value &= 0x3F3F;
393 softwareRenderer->winout.packed = value;
394 softwareRenderer->objwin.packed = value >> 8;
395 break;
396 case REG_MOSAIC:
397 softwareRenderer->mosaic = value;
398 break;
399 default:
400 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
401 }
402 softwareRenderer->nextIo[address >> 1] = value;
403 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
404 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
405 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
406 }
407 return value;
408}
409
410static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
411 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
412 if (renderer->cache) {
413 mCacheSetWriteVRAM(renderer->cache, address);
414 }
415 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
416 softwareRenderer->bg[0].yCache = -1;
417 softwareRenderer->bg[1].yCache = -1;
418 softwareRenderer->bg[2].yCache = -1;
419 softwareRenderer->bg[3].yCache = -1;
420}
421
422static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
423 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
424 UNUSED(oam);
425 softwareRenderer->oamDirty = 1;
426 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
427}
428
429static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
430 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
431 color_t color = mColorFrom555(value);
432 softwareRenderer->normalPalette[address >> 1] = color;
433 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
434 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
435 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
436 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
437 }
438 if (renderer->cache) {
439 mCacheSetWritePalette(renderer->cache, address >> 1, color);
440 }
441 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
442}
443
444static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
445 if (win->v.end >= win->v.start) {
446 if (y >= win->v.end + win->offsetY) {
447 return;
448 }
449 if (y < win->v.start + win->offsetY) {
450 return;
451 }
452 } else if (y >= win->v.end + win->offsetY && y < win->v.start + win->offsetY) {
453 return;
454 }
455 if (win->h.end > GBA_VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
456 struct WindowN splits[2] = { *win, *win };
457 splits[0].h.start = 0;
458 splits[1].h.end = GBA_VIDEO_HORIZONTAL_PIXELS;
459 _breakWindowInner(softwareRenderer, &splits[0]);
460 _breakWindowInner(softwareRenderer, &splits[1]);
461 } else {
462 _breakWindowInner(softwareRenderer, win);
463 }
464}
465
466static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
467 int activeWindow;
468 int startX = 0;
469 if (win->h.end > 0) {
470 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
471 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
472 // Insert a window before the end of the active window
473 struct Window oldWindow = softwareRenderer->windows[activeWindow];
474 if (win->h.start > startX) {
475 // And after the start of the active window
476 int nextWindow = softwareRenderer->nWindows;
477 ++softwareRenderer->nWindows;
478 for (; nextWindow > activeWindow; --nextWindow) {
479 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
480 }
481 softwareRenderer->windows[activeWindow].endX = win->h.start;
482 ++activeWindow;
483 }
484 softwareRenderer->windows[activeWindow].control = win->control;
485 softwareRenderer->windows[activeWindow].endX = win->h.end;
486 if (win->h.end >= oldWindow.endX) {
487 // Trim off extra windows we've overwritten
488 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
489 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
490 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
491 return;
492 }
493 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
494 --softwareRenderer->nWindows;
495 }
496 } else {
497 ++activeWindow;
498 int nextWindow = softwareRenderer->nWindows;
499 ++softwareRenderer->nWindows;
500 for (; nextWindow > activeWindow; --nextWindow) {
501 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
502 }
503 softwareRenderer->windows[activeWindow] = oldWindow;
504 }
505 break;
506 }
507 startX = softwareRenderer->windows[activeWindow].endX;
508 }
509 }
510#ifdef DEBUG
511 if (softwareRenderer->nWindows > MAX_WINDOW) {
512 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
513 }
514#endif
515}
516
517static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
518 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
519
520 if (y == GBA_VIDEO_VERTICAL_PIXELS - 1) {
521 softwareRenderer->nextY = 0;
522 } else {
523 softwareRenderer->nextY = y + 1;
524 }
525
526 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1U << (y & 0x1F));
527 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
528 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
529 dirty = true;
530 }
531
532 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
533 if (softwareRenderer->cache[y].scale[0][0] != softwareRenderer->bg[2].sx ||
534 softwareRenderer->cache[y].scale[0][1] != softwareRenderer->bg[2].sy ||
535 softwareRenderer->cache[y].scale[1][0] != softwareRenderer->bg[3].sx ||
536 softwareRenderer->cache[y].scale[1][1] != softwareRenderer->bg[3].sy) {
537 dirty = true;
538 }
539 }
540 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
541 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
542 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
543 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
544
545 if (!dirty) {
546 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
547 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
548 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
549 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
550 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
551 }
552 return;
553 }
554
555 CLEAN_SCANLINE(softwareRenderer, y);
556
557 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
558 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
559 int x;
560 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; ++x) {
561 row[x] = M_COLOR_WHITE;
562 }
563 return;
564 }
565
566 int x;
567 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
568 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
569 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
570 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
571 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
572 }
573
574 softwareRenderer->windows[0].endX = GBA_VIDEO_HORIZONTAL_PIXELS;
575 softwareRenderer->nWindows = 1;
576 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
577 softwareRenderer->windows[0].control = softwareRenderer->winout;
578 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) && !renderer->disableWIN[1]) {
579 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
580 }
581 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) && !renderer->disableWIN[0]) {
582 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
583 }
584 } else {
585 softwareRenderer->windows[0].control.packed = 0xFF;
586 }
587
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 int w;
602 x = 0;
603 for (w = 0; w < softwareRenderer->nWindows; ++w) {
604 // TOOD: handle objwin on backdrop
605 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
606 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
607 backdrop |= softwareRenderer->normalPalette[0];
608 } else {
609 backdrop |= softwareRenderer->variantPalette[0];
610 }
611 int end = softwareRenderer->windows[w].endX;
612 for (; x < end - 3; x += 4) {
613 softwareRenderer->row[x] = backdrop;
614 softwareRenderer->row[x + 1] = backdrop;
615 softwareRenderer->row[x + 2] = backdrop;
616 softwareRenderer->row[x + 3] = backdrop;
617 }
618 for (; x < end; ++x) {
619 softwareRenderer->row[x] = backdrop;
620 }
621 }
622
623 softwareRenderer->bg[0].highlight = softwareRenderer->d.highlightBG[0];
624 softwareRenderer->bg[1].highlight = softwareRenderer->d.highlightBG[1];
625 softwareRenderer->bg[2].highlight = softwareRenderer->d.highlightBG[2];
626 softwareRenderer->bg[3].highlight = softwareRenderer->d.highlightBG[3];
627
628 _drawScanline(softwareRenderer, y);
629
630 if ((softwareRenderer->forceTarget1 || softwareRenderer->bg[0].target1 || softwareRenderer->bg[1].target1 || softwareRenderer->bg[2].target1 || softwareRenderer->bg[3].target1) && softwareRenderer->target2Bd) {
631 x = 0;
632 for (w = 0; w < softwareRenderer->nWindows; ++w) {
633 uint32_t backdrop = 0;
634 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
635 backdrop |= softwareRenderer->normalPalette[0];
636 } else {
637 backdrop |= softwareRenderer->variantPalette[0];
638 }
639 int end = softwareRenderer->windows[w].endX;
640 for (; x < end; ++x) {
641 uint32_t color = softwareRenderer->row[x];
642 if (color & FLAG_TARGET_1) {
643 softwareRenderer->row[x] = mColorMix5Bit(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
644 }
645 }
646 }
647 }
648 if (softwareRenderer->forceTarget1 && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
649 x = 0;
650 for (w = 0; w < softwareRenderer->nWindows; ++w) {
651 int end = softwareRenderer->windows[w].endX;
652 uint32_t mask = FLAG_REBLEND | FLAG_IS_BACKGROUND;
653 uint32_t match = FLAG_REBLEND;
654 bool objBlend = GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed);
655 bool winBlend = GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed);
656 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt) && objBlend != winBlend) {
657 mask |= FLAG_OBJWIN;
658 if (objBlend) {
659 match |= FLAG_OBJWIN;
660 }
661 } else if (!winBlend) {
662 x = end;
663 continue;
664 }
665 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
666 for (; x < end; ++x) {
667 uint32_t color = softwareRenderer->row[x];
668 if ((color & mask) == match) {
669 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
670 }
671 }
672 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
673 for (; x < end; ++x) {
674 uint32_t color = softwareRenderer->row[x];
675 if ((color & mask) == match) {
676 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
677 }
678 }
679 }
680 }
681 }
682
683 if (softwareRenderer->greenswap) {
684 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
685 row[x] = softwareRenderer->row[x] & (M_COLOR_RED | M_COLOR_BLUE);
686 row[x] |= softwareRenderer->row[x + 1] & M_COLOR_GREEN;
687 row[x + 1] = softwareRenderer->row[x + 1] & (M_COLOR_RED | M_COLOR_BLUE);
688 row[x + 1] |= softwareRenderer->row[x] & M_COLOR_GREEN;
689 row[x + 2] = softwareRenderer->row[x + 2] & (M_COLOR_RED | M_COLOR_BLUE);
690 row[x + 2] |= softwareRenderer->row[x + 3] & M_COLOR_GREEN;
691 row[x + 3] = softwareRenderer->row[x + 3] & (M_COLOR_RED | M_COLOR_BLUE);
692 row[x + 3] |= softwareRenderer->row[x + 2] & M_COLOR_GREEN;
693
694 }
695 } else {
696#ifdef COLOR_16_BIT
697 for (x = 0; x < GBA_VIDEO_HORIZONTAL_PIXELS; x += 4) {
698 row[x] = softwareRenderer->row[x];
699 row[x + 1] = softwareRenderer->row[x + 1];
700 row[x + 2] = softwareRenderer->row[x + 2];
701 row[x + 3] = softwareRenderer->row[x + 3];
702 }
703#else
704 memcpy(row, softwareRenderer->row, GBA_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
705#endif
706 }
707}
708
709static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
710 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
711
712 softwareRenderer->nextY = 0;
713 if (softwareRenderer->temporaryBuffer) {
714 mappedMemoryFree(softwareRenderer->temporaryBuffer, GBA_VIDEO_HORIZONTAL_PIXELS * GBA_VIDEO_VERTICAL_PIXELS * 4);
715 softwareRenderer->temporaryBuffer = 0;
716 }
717 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
718 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
719 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
720 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
721
722 if (softwareRenderer->bg[0].enabled > 0) {
723 softwareRenderer->bg[0].enabled = 3;
724 }
725 if (softwareRenderer->bg[1].enabled > 0) {
726 softwareRenderer->bg[1].enabled = 3;
727 }
728 if (softwareRenderer->bg[2].enabled > 0) {
729 softwareRenderer->bg[2].enabled = 3;
730 }
731 if (softwareRenderer->bg[3].enabled > 0) {
732 softwareRenderer->bg[3].enabled = 3;
733 }
734}
735
736static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
737 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
738 *stride = softwareRenderer->outputBufferStride;
739 *pixels = softwareRenderer->outputBuffer;
740}
741
742static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
743 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
744
745 const color_t* colorPixels = pixels;
746 unsigned i;
747 for (i = 0; i < GBA_VIDEO_VERTICAL_PIXELS; ++i) {
748 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GBA_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
749 }
750}
751
752static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
753 int wasActive = renderer->bg[bg].enabled;
754 if (!active) {
755 renderer->bg[bg].enabled = 0;
756 } else if (!wasActive && active) {
757 if (renderer->nextY == 0 || GBARegisterDISPCNTGetMode(renderer->dispcnt) > 2) {
758 // TODO: Investigate in more depth how switching background works in different modes
759 renderer->bg[bg].enabled = 3;
760 } else {
761 renderer->bg[bg].enabled = 1;
762 }
763 }
764}
765
766static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
767 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
768 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
769 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
770 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
771}
772
773static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
774 UNUSED(renderer);
775 bg->priority = GBARegisterBGCNTGetPriority(value);
776 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
777 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
778 bg->multipalette = GBARegisterBGCNTGet256Color(value);
779 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
780 bg->overflow = GBARegisterBGCNTGetOverflow(value);
781 bg->size = GBARegisterBGCNTGetSize(value);
782 bg->yCache = -1;
783}
784
785static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
786 bg->refx = (bg->refx & 0xFFFF0000) | value;
787 bg->sx = bg->refx;
788}
789
790static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
791 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
792 bg->refx <<= 4;
793 bg->refx >>= 4;
794 bg->sx = bg->refx;
795}
796
797static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
798 bg->refy = (bg->refy & 0xFFFF0000) | value;
799 bg->sy = bg->refy;
800}
801
802static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
803 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
804 bg->refy <<= 4;
805 bg->refy >>= 4;
806 bg->sy = bg->refy;
807}
808
809static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
810 enum GBAVideoBlendEffect oldEffect = renderer->blendEffect;
811
812 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
813 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
814 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
815 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
816 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
817 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
818 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
819 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
820
821 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
822 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
823 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
824 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
825 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
826
827 if (oldEffect != renderer->blendEffect) {
828 renderer->blendDirty = true;
829 }
830}
831
832#define TEST_LAYER_ENABLED(X) \
833 !renderer->d.disableBG[X] && \
834 (renderer->bg[X].enabled == 3 && \
835 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
836 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
837 renderer->bg[X].priority == priority)
838
839static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
840 int w;
841 int spriteLayers = 0;
842 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
843 if (renderer->oamDirty) {
844 renderer->oamMax = GBAVideoRendererCleanOAM(renderer->d.oam->obj, renderer->sprites, renderer->objOffsetY);
845 renderer->oamDirty = false;
846 }
847 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
848 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
849 int mosaicY = y - (y % mosaicV);
850 int i;
851 for (i = 0; i < renderer->oamMax; ++i) {
852 struct GBAVideoRendererSprite* sprite = &renderer->sprites[i];
853 int localY = y;
854 renderer->end = 0;
855 if ((y < sprite->y && (sprite->endY - 256 < 0 || y >= sprite->endY - 256)) || y >= sprite->endY) {
856 continue;
857 }
858 if (GBAObjAttributesAIsMosaic(sprite->obj.a) && mosaicV > 1) {
859 localY = mosaicY;
860 if (localY < sprite->y && sprite->y < GBA_VIDEO_VERTICAL_PIXELS) {
861 localY = sprite->y;
862 }
863 if (localY >= (sprite->endY & 0xFF)) {
864 localY = sprite->endY - 1;
865 }
866 }
867 for (w = 0; w < renderer->nWindows; ++w) {
868 renderer->currentWindow = renderer->windows[w].control;
869 renderer->start = renderer->end;
870 renderer->end = renderer->windows[w].endX;
871 // TODO: partial sprite drawing
872 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
873 continue;
874 }
875
876 int drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, sprite->index, localY);
877 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
878 }
879 renderer->spriteCyclesRemaining -= sprite->cycles;
880 if (renderer->spriteCyclesRemaining <= 0) {
881 break;
882 }
883 }
884 }
885
886 unsigned priority;
887 for (priority = 0; priority < 4; ++priority) {
888 renderer->end = 0;
889 for (w = 0; w < renderer->nWindows; ++w) {
890 renderer->start = renderer->end;
891 renderer->end = renderer->windows[w].endX;
892 renderer->currentWindow = renderer->windows[w].control;
893 if (spriteLayers & (1 << priority)) {
894 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
895 }
896 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
897 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
898 }
899 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
900 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
901 }
902 if (TEST_LAYER_ENABLED(2)) {
903 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
904 case 0:
905 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
906 break;
907 case 1:
908 case 2:
909 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
910 break;
911 case 3:
912 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
913 break;
914 case 4:
915 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
916 break;
917 case 5:
918 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
919 break;
920 }
921 }
922 if (TEST_LAYER_ENABLED(3)) {
923 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
924 case 0:
925 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
926 break;
927 case 2:
928 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
929 break;
930 }
931 }
932 }
933 }
934 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
935 renderer->bg[2].sx += renderer->bg[2].dmx;
936 renderer->bg[2].sy += renderer->bg[2].dmy;
937 renderer->bg[3].sx += renderer->bg[3].dmx;
938 renderer->bg[3].sy += renderer->bg[3].dmy;
939 }
940
941 if (renderer->bg[0].enabled > 0 && renderer->bg[0].enabled < 3) {
942 ++renderer->bg[0].enabled;
943 DIRTY_SCANLINE(renderer, y);
944 }
945 if (renderer->bg[1].enabled > 0 && renderer->bg[1].enabled < 3) {
946 ++renderer->bg[1].enabled;
947 DIRTY_SCANLINE(renderer, y);
948 }
949 if (renderer->bg[2].enabled > 0 && renderer->bg[2].enabled < 3) {
950 ++renderer->bg[2].enabled;
951 DIRTY_SCANLINE(renderer, y);
952 }
953 if (renderer->bg[3].enabled > 0 && renderer->bg[3].enabled < 3) {
954 ++renderer->bg[3].enabled;
955 DIRTY_SCANLINE(renderer, y);
956 }
957}
958
959static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
960 int i;
961 if (renderer->blendEffect == BLEND_BRIGHTEN) {
962 for (i = 0; i < 512; ++i) {
963 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
964 }
965 } else if (renderer->blendEffect == BLEND_DARKEN) {
966 for (i = 0; i < 512; ++i) {
967 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
968 }
969 } else {
970 for (i = 0; i < 512; ++i) {
971 renderer->variantPalette[i] = renderer->normalPalette[i];
972 }
973 }
974 unsigned highlightAmount = renderer->d.highlightAmount >> 4;
975
976 if (highlightAmount) {
977 for (i = 0; i < 512; ++i) {
978 renderer->highlightPalette[i] = mColorMix5Bit(0x10 - highlightAmount, renderer->normalPalette[i], highlightAmount, renderer->d.highlightColor);
979 renderer->highlightVariantPalette[i] = mColorMix5Bit(0x10 - highlightAmount, renderer->variantPalette[i], highlightAmount, renderer->d.highlightColor);
980 }
981 }
982}