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/tile-cache.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11
12#include <mgba-util/arm-algo.h>
13#include <mgba-util/memory.h>
14
15#define DIRTY_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] |= (1 << (Y & 0x1F))
16#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1 << (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 _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
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
65 renderer->temporaryBuffer = 0;
66}
67
68static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
69 GBAVideoSoftwareRendererReset(renderer);
70
71 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
72
73 int y;
74 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
75 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
76 int x;
77 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
78 row[x] = GBA_COLOR_WHITE;
79 }
80 }
81}
82
83static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
84 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
85 int i;
86
87 softwareRenderer->dispcnt = 0x0080;
88
89 softwareRenderer->target1Obj = 0;
90 softwareRenderer->target1Bd = 0;
91 softwareRenderer->target2Obj = 0;
92 softwareRenderer->target2Bd = 0;
93 softwareRenderer->blendEffect = BLEND_NONE;
94 for (i = 0; i < 1024; i += 2) {
95 uint16_t entry;
96 LOAD_16(entry, i, softwareRenderer->d.palette);
97 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
98 }
99 softwareRenderer->blendDirty = false;
100 _updatePalettes(softwareRenderer);
101
102 softwareRenderer->blda = 0;
103 softwareRenderer->bldb = 0;
104 softwareRenderer->bldy = 0;
105
106 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
107 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
108 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
109 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
110 softwareRenderer->oamMax = 0;
111
112 softwareRenderer->mosaic = 0;
113 softwareRenderer->nextY = 0;
114
115 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
116 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
117 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
118
119 for (i = 0; i < 4; ++i) {
120 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
121 bg->index = i;
122 bg->enabled = 0;
123 bg->priority = 0;
124 bg->charBase = 0;
125 bg->mosaic = 0;
126 bg->multipalette = 0;
127 bg->screenBase = 0;
128 bg->overflow = 0;
129 bg->size = 0;
130 bg->target1 = 0;
131 bg->target2 = 0;
132 bg->x = 0;
133 bg->y = 0;
134 bg->refx = 0;
135 bg->refy = 0;
136 bg->dx = 256;
137 bg->dmx = 0;
138 bg->dy = 0;
139 bg->dmy = 256;
140 bg->sx = 0;
141 bg->sy = 0;
142 }
143}
144
145static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
146 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
147 UNUSED(softwareRenderer);
148}
149
150static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
151 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
152 switch (address) {
153 case REG_DISPCNT:
154 softwareRenderer->dispcnt = value;
155 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
156 break;
157 case REG_BG0CNT:
158 value &= 0xDFFF;
159 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
160 break;
161 case REG_BG1CNT:
162 value &= 0xDFFF;
163 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
164 break;
165 case REG_BG2CNT:
166 value &= 0xFFFF;
167 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
168 break;
169 case REG_BG3CNT:
170 value &= 0xFFFF;
171 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
172 break;
173 case REG_BG0HOFS:
174 value &= 0x01FF;
175 softwareRenderer->bg[0].x = value;
176 break;
177 case REG_BG0VOFS:
178 value &= 0x01FF;
179 softwareRenderer->bg[0].y = value;
180 break;
181 case REG_BG1HOFS:
182 value &= 0x01FF;
183 softwareRenderer->bg[1].x = value;
184 break;
185 case REG_BG1VOFS:
186 value &= 0x01FF;
187 softwareRenderer->bg[1].y = value;
188 break;
189 case REG_BG2HOFS:
190 value &= 0x01FF;
191 softwareRenderer->bg[2].x = value;
192 break;
193 case REG_BG2VOFS:
194 value &= 0x01FF;
195 softwareRenderer->bg[2].y = value;
196 break;
197 case REG_BG3HOFS:
198 value &= 0x01FF;
199 softwareRenderer->bg[3].x = value;
200 break;
201 case REG_BG3VOFS:
202 value &= 0x01FF;
203 softwareRenderer->bg[3].y = value;
204 break;
205 case REG_BG2PA:
206 softwareRenderer->bg[2].dx = value;
207 break;
208 case REG_BG2PB:
209 softwareRenderer->bg[2].dmx = value;
210 break;
211 case REG_BG2PC:
212 softwareRenderer->bg[2].dy = value;
213 break;
214 case REG_BG2PD:
215 softwareRenderer->bg[2].dmy = value;
216 break;
217 case REG_BG2X_LO:
218 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
219 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
220 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
221 }
222 break;
223 case REG_BG2X_HI:
224 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
225 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
226 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
227 }
228 break;
229 case REG_BG2Y_LO:
230 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
231 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
232 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
233 }
234 break;
235 case REG_BG2Y_HI:
236 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
237 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
238 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
239 }
240 break;
241 case REG_BG3PA:
242 softwareRenderer->bg[3].dx = value;
243 break;
244 case REG_BG3PB:
245 softwareRenderer->bg[3].dmx = value;
246 break;
247 case REG_BG3PC:
248 softwareRenderer->bg[3].dy = value;
249 break;
250 case REG_BG3PD:
251 softwareRenderer->bg[3].dmy = value;
252 break;
253 case REG_BG3X_LO:
254 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
255 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
256 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
257 }
258 break;
259 case REG_BG3X_HI:
260 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
261 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
262 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
263 }
264 break;
265 case REG_BG3Y_LO:
266 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
267 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
268 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
269 }
270 break;
271 case REG_BG3Y_HI:
272 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
273 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
274 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
275 }
276 break;
277 case REG_BLDCNT:
278 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
279 value &= 0x3FFF;
280 break;
281 case REG_BLDALPHA:
282 softwareRenderer->blda = value & 0x1F;
283 if (softwareRenderer->blda > 0x10) {
284 softwareRenderer->blda = 0x10;
285 }
286 softwareRenderer->bldb = (value >> 8) & 0x1F;
287 if (softwareRenderer->bldb > 0x10) {
288 softwareRenderer->bldb = 0x10;
289 }
290 value &= 0x1F1F;
291 break;
292 case REG_BLDY:
293 value &= 0x1F;
294 if (value > 0x10) {
295 value = 0x10;
296 }
297 if (softwareRenderer->bldy != value) {
298 softwareRenderer->bldy = value;
299 softwareRenderer->blendDirty = true;
300 }
301 break;
302 case REG_WIN0H:
303 softwareRenderer->winN[0].h.end = value;
304 softwareRenderer->winN[0].h.start = value >> 8;
305 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
306 softwareRenderer->winN[0].h.start = 0;
307 }
308 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
309 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
310 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
311 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
312 }
313 }
314 break;
315 case REG_WIN1H:
316 softwareRenderer->winN[1].h.end = value;
317 softwareRenderer->winN[1].h.start = value >> 8;
318 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
319 softwareRenderer->winN[1].h.start = 0;
320 }
321 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
322 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
323 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
324 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
325 }
326 }
327 break;
328 case REG_WIN0V:
329 softwareRenderer->winN[0].v.end = value;
330 softwareRenderer->winN[0].v.start = value >> 8;
331 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
332 softwareRenderer->winN[0].v.start = 0;
333 }
334 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
335 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
336 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
337 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
338 }
339 }
340 break;
341 case REG_WIN1V:
342 softwareRenderer->winN[1].v.end = value;
343 softwareRenderer->winN[1].v.start = value >> 8;
344 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
345 softwareRenderer->winN[1].v.start = 0;
346 }
347 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
348 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
349 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
350 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
351 }
352 }
353 break;
354 case REG_WININ:
355 value &= 0x3F3F;
356 softwareRenderer->winN[0].control.packed = value;
357 softwareRenderer->winN[1].control.packed = value >> 8;
358 break;
359 case REG_WINOUT:
360 value &= 0x3F3F;
361 softwareRenderer->winout.packed = value;
362 softwareRenderer->objwin.packed = value >> 8;
363 break;
364 case REG_MOSAIC:
365 softwareRenderer->mosaic = value;
366 break;
367 case REG_GREENSWP:
368 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
369 break;
370 default:
371 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
372 }
373 softwareRenderer->nextIo[address >> 1] = value;
374 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
375 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
376 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
377 }
378 return value;
379}
380
381static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
382 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
383 if (renderer->cache) {
384 mTileCacheWriteVRAM(renderer->cache, address);
385 }
386 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
387}
388
389static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
390 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
391 UNUSED(oam);
392 softwareRenderer->oamDirty = 1;
393 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
394}
395
396static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
397 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
398 color_t color = mColorFrom555(value);
399 softwareRenderer->normalPalette[address >> 1] = color;
400 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
401 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
402 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
403 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
404 }
405 if (renderer->cache) {
406 mTileCacheWritePalette(renderer->cache, address);
407 }
408 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
409}
410
411static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
412 if (win->v.end >= win->v.start) {
413 if (y >= win->v.end) {
414 return;
415 }
416 if (y < win->v.start) {
417 return;
418 }
419 } else if (y >= win->v.end && y < win->v.start) {
420 return;
421 }
422 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
423 struct WindowN splits[2] = { *win, *win };
424 splits[0].h.start = 0;
425 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
426 _breakWindowInner(softwareRenderer, &splits[0]);
427 _breakWindowInner(softwareRenderer, &splits[1]);
428 } else {
429 _breakWindowInner(softwareRenderer, win);
430 }
431}
432
433static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
434 int activeWindow;
435 int startX = 0;
436 if (win->h.end > 0) {
437 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
438 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
439 // Insert a window before the end of the active window
440 struct Window oldWindow = softwareRenderer->windows[activeWindow];
441 if (win->h.start > startX) {
442 // And after the start of the active window
443 int nextWindow = softwareRenderer->nWindows;
444 ++softwareRenderer->nWindows;
445 for (; nextWindow > activeWindow; --nextWindow) {
446 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
447 }
448 softwareRenderer->windows[activeWindow].endX = win->h.start;
449 ++activeWindow;
450 }
451 softwareRenderer->windows[activeWindow].control = win->control;
452 softwareRenderer->windows[activeWindow].endX = win->h.end;
453 if (win->h.end >= oldWindow.endX) {
454 // Trim off extra windows we've overwritten
455 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
456 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
457 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
458 return;
459 }
460 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
461 --softwareRenderer->nWindows;
462 }
463 } else {
464 ++activeWindow;
465 int nextWindow = softwareRenderer->nWindows;
466 ++softwareRenderer->nWindows;
467 for (; nextWindow > activeWindow; --nextWindow) {
468 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
469 }
470 softwareRenderer->windows[activeWindow] = oldWindow;
471 }
472 break;
473 }
474 startX = softwareRenderer->windows[activeWindow].endX;
475 }
476 }
477#ifdef DEBUG
478 if (softwareRenderer->nWindows > MAX_WINDOW) {
479 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
480 }
481#endif
482}
483
484static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
485 int i;
486 int oamMax = 0;
487 for (i = 0; i < 128; ++i) {
488 struct GBAObj obj;
489 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
490 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
491 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
492 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
493 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
494 if (GBAObjAttributesAIsTransformed(obj.a)) {
495 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
496 }
497 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
498 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
499 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
500 renderer->sprites[oamMax].obj = obj;
501 ++oamMax;
502 }
503 }
504 }
505 renderer->oamMax = oamMax;
506 renderer->oamDirty = 0;
507}
508
509static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
510 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
511
512 if (y == VIDEO_VERTICAL_PIXELS - 1) {
513 softwareRenderer->nextY = 0;
514 } else {
515 softwareRenderer->nextY = y + 1;
516 }
517
518 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
519 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
520 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
521 dirty = true;
522 }
523
524 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
525 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
526 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
527 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
528
529 if (!dirty) {
530 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
531 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
532 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
533 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
534 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
535 }
536 return;
537 }
538
539 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
540 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
541 int x;
542 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
543 row[x] = GBA_COLOR_WHITE;
544 }
545 return;
546 }
547
548 int x;
549 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
550 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
551 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
552 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
553 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
554 }
555
556 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
557 softwareRenderer->nWindows = 1;
558 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
559 softwareRenderer->windows[0].control = softwareRenderer->winout;
560 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
561 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
562 }
563 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
564 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
565 }
566 } else {
567 softwareRenderer->windows[0].control.packed = 0xFF;
568 }
569
570 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
571 if (softwareRenderer->blendDirty) {
572 _updatePalettes(softwareRenderer);
573 softwareRenderer->blendDirty = false;
574 }
575
576 int w;
577 x = 0;
578 for (w = 0; w < softwareRenderer->nWindows; ++w) {
579 // TOOD: handle objwin on backdrop
580 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
581 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
582 backdrop |= softwareRenderer->normalPalette[0];
583 } else {
584 backdrop |= softwareRenderer->variantPalette[0];
585 }
586 int end = softwareRenderer->windows[w].endX;
587 for (; x < end - 3; x += 4) {
588 softwareRenderer->row[x] = backdrop;
589 softwareRenderer->row[x + 1] = backdrop;
590 softwareRenderer->row[x + 2] = backdrop;
591 softwareRenderer->row[x + 3] = backdrop;
592 }
593 for (; x < end; ++x) {
594 softwareRenderer->row[x] = backdrop;
595 }
596 }
597
598 _drawScanline(softwareRenderer, y);
599
600 if (softwareRenderer->target2Bd) {
601 x = 0;
602 for (w = 0; w < softwareRenderer->nWindows; ++w) {
603 uint32_t backdrop = 0;
604 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
605 backdrop |= softwareRenderer->normalPalette[0];
606 } else {
607 backdrop |= softwareRenderer->variantPalette[0];
608 }
609 int end = softwareRenderer->windows[w].endX;
610 for (; x < end; ++x) {
611 uint32_t color = softwareRenderer->row[x];
612 if (color & FLAG_TARGET_1) {
613 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
614 }
615 }
616 }
617 }
618 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
619 x = 0;
620 for (w = 0; w < softwareRenderer->nWindows; ++w) {
621 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
622 continue;
623 }
624 int end = softwareRenderer->windows[w].endX;
625 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
626 for (; x < end; ++x) {
627 uint32_t color = softwareRenderer->row[x];
628 if ((color & 0xFF000000) == FLAG_REBLEND) {
629 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
630 }
631 }
632 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
633 for (; x < end; ++x) {
634 uint32_t color = softwareRenderer->row[x];
635 if ((color & 0xFF000000) == FLAG_REBLEND) {
636 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
637 }
638 }
639 }
640 }
641 }
642
643#ifdef COLOR_16_BIT
644#if defined(__ARM_NEON) && !defined(__APPLE__)
645 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
646#else
647 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
648 row[x] = softwareRenderer->row[x];
649 }
650#endif
651#else
652 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
653#endif
654 CLEAN_SCANLINE(softwareRenderer, y);
655}
656
657static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
658 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
659
660 softwareRenderer->nextY = 0;
661 if (softwareRenderer->temporaryBuffer) {
662 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
663 softwareRenderer->temporaryBuffer = 0;
664 }
665 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
666 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
667 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
668 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
669}
670
671static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
672 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
673 *stride = softwareRenderer->outputBufferStride;
674 *pixels = softwareRenderer->outputBuffer;
675}
676
677static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
678 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
679
680 const color_t* colorPixels = pixels;
681 unsigned i;
682 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
683 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
684 }
685}
686
687static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
688 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
689 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
690 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
691 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
692}
693
694static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
695 UNUSED(renderer);
696 bg->priority = GBARegisterBGCNTGetPriority(value);
697 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
698 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
699 bg->multipalette = GBARegisterBGCNTGet256Color(value);
700 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
701 bg->overflow = GBARegisterBGCNTGetOverflow(value);
702 bg->size = GBARegisterBGCNTGetSize(value);
703}
704
705static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
706 bg->refx = (bg->refx & 0xFFFF0000) | value;
707 bg->sx = bg->refx;
708}
709
710static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
711 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
712 bg->refx <<= 4;
713 bg->refx >>= 4;
714 bg->sx = bg->refx;
715}
716
717static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
718 bg->refy = (bg->refy & 0xFFFF0000) | value;
719 bg->sy = bg->refy;
720}
721
722static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
723 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
724 bg->refy <<= 4;
725 bg->refy >>= 4;
726 bg->sy = bg->refy;
727}
728
729static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
730 enum BlendEffect oldEffect = renderer->blendEffect;
731
732 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
733 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
734 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
735 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
736 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
737 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
738 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
739 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
740
741 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
742 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
743 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
744 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
745 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
746
747 if (oldEffect != renderer->blendEffect) {
748 renderer->blendDirty = true;
749 }
750}
751
752#define TEST_LAYER_ENABLED(X) \
753 (renderer->bg[X].enabled && \
754 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
755 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
756 renderer->bg[X].priority == priority)
757
758static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
759 int w;
760 renderer->end = 0;
761 int spriteLayers = 0;
762 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
763 if (renderer->oamDirty) {
764 _cleanOAM(renderer);
765 }
766 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
767 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
768 int mosaicY = y - (y % mosaicV);
769 for (w = 0; w < renderer->nWindows; ++w) {
770 renderer->start = renderer->end;
771 renderer->end = renderer->windows[w].endX;
772 renderer->currentWindow = renderer->windows[w].control;
773 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
774 continue;
775 }
776 int i;
777 int drawn;
778
779 for (i = 0; i < renderer->oamMax; ++i) {
780 int localY = y;
781 if (renderer->spriteCyclesRemaining <= 0) {
782 break;
783 }
784 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
785 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
786 localY = mosaicY;
787 }
788 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
789 continue;
790 }
791 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
792 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
793 }
794 }
795 }
796
797 unsigned priority;
798 for (priority = 0; priority < 4; ++priority) {
799 renderer->end = 0;
800 for (w = 0; w < renderer->nWindows; ++w) {
801 renderer->start = renderer->end;
802 renderer->end = renderer->windows[w].endX;
803 renderer->currentWindow = renderer->windows[w].control;
804 if (spriteLayers & (1 << priority)) {
805 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
806 }
807 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
808 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
809 }
810 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
811 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
812 }
813 if (TEST_LAYER_ENABLED(2)) {
814 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
815 case 0:
816 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
817 break;
818 case 1:
819 case 2:
820 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
821 break;
822 case 3:
823 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
824 break;
825 case 4:
826 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
827 break;
828 case 5:
829 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
830 break;
831 }
832 }
833 if (TEST_LAYER_ENABLED(3)) {
834 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
835 case 0:
836 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
837 break;
838 case 2:
839 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
840 break;
841 }
842 }
843 }
844 }
845 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
846 renderer->bg[2].sx += renderer->bg[2].dmx;
847 renderer->bg[2].sy += renderer->bg[2].dmy;
848 renderer->bg[3].sx += renderer->bg[3].dmx;
849 renderer->bg[3].sy += renderer->bg[3].dmy;
850 }
851}
852
853static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
854 int i;
855 if (renderer->blendEffect == BLEND_BRIGHTEN) {
856 for (i = 0; i < 512; ++i) {
857 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
858 }
859 } else if (renderer->blendEffect == BLEND_DARKEN) {
860 for (i = 0; i < 512; ++i) {
861 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
862 }
863 } else {
864 for (i = 0; i < 512; ++i) {
865 renderer->variantPalette[i] = renderer->normalPalette[i];
866 }
867 }
868}