src/gba/renderers/video-software.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "gba/renderers/software-private.h"
7
8#include <mgba/core/cache-set.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11#include <mgba/internal/gba/renderers/cache-set.h>
12
13#include <mgba-util/arm-algo.h>
14#include <mgba-util/memory.h>
15
16#define DIRTY_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] |= (1 << (Y & 0x1F))
17#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1 << (Y & 0x1F))
18
19static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
20static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
21static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
22static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
23static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
24static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
25static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
26static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
27static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
28static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
29static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
30
31static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
32static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
38
39static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
40static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
41
42static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
43
44static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
45static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
46
47void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
48 renderer->d.init = GBAVideoSoftwareRendererInit;
49 renderer->d.reset = GBAVideoSoftwareRendererReset;
50 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
51 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
52 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
53 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
54 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
55 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
56 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
57 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
58 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
59
60 renderer->d.disableBG[0] = false;
61 renderer->d.disableBG[1] = false;
62 renderer->d.disableBG[2] = false;
63 renderer->d.disableBG[3] = false;
64 renderer->d.disableOBJ = false;
65
66 renderer->temporaryBuffer = 0;
67}
68
69static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
70 GBAVideoSoftwareRendererReset(renderer);
71
72 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
73
74 int y;
75 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
76 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
77 int x;
78 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
79 row[x] = GBA_COLOR_WHITE;
80 }
81 }
82}
83
84static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
85 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
86 int i;
87
88 softwareRenderer->dispcnt = 0x0080;
89
90 softwareRenderer->target1Obj = 0;
91 softwareRenderer->target1Bd = 0;
92 softwareRenderer->target2Obj = 0;
93 softwareRenderer->target2Bd = 0;
94 softwareRenderer->blendEffect = BLEND_NONE;
95 for (i = 0; i < 1024; i += 2) {
96 uint16_t entry;
97 LOAD_16(entry, i, softwareRenderer->d.palette);
98 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
99 }
100 softwareRenderer->blendDirty = false;
101 _updatePalettes(softwareRenderer);
102
103 softwareRenderer->blda = 0;
104 softwareRenderer->bldb = 0;
105 softwareRenderer->bldy = 0;
106
107 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
108 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
109 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
110 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
111 softwareRenderer->oamMax = 0;
112
113 softwareRenderer->mosaic = 0;
114 softwareRenderer->nextY = 0;
115
116 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
117 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
118 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
119
120 for (i = 0; i < 4; ++i) {
121 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
122 bg->index = i;
123 bg->enabled = 0;
124 bg->priority = 0;
125 bg->charBase = 0;
126 bg->mosaic = 0;
127 bg->multipalette = 0;
128 bg->screenBase = 0;
129 bg->overflow = 0;
130 bg->size = 0;
131 bg->target1 = 0;
132 bg->target2 = 0;
133 bg->x = 0;
134 bg->y = 0;
135 bg->refx = 0;
136 bg->refy = 0;
137 bg->dx = 256;
138 bg->dmx = 0;
139 bg->dy = 0;
140 bg->dmy = 256;
141 bg->sx = 0;
142 bg->sy = 0;
143 bg->yCache = -1;
144 }
145}
146
147static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
148 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
149 UNUSED(softwareRenderer);
150}
151
152static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
153 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
154 if (renderer->cache) {
155 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
156 }
157
158 switch (address) {
159 case REG_DISPCNT:
160 softwareRenderer->dispcnt = value;
161 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
162 break;
163 case REG_BG0CNT:
164 value &= 0xDFFF;
165 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
166 break;
167 case REG_BG1CNT:
168 value &= 0xDFFF;
169 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
170 break;
171 case REG_BG2CNT:
172 value &= 0xFFFF;
173 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
174 break;
175 case REG_BG3CNT:
176 value &= 0xFFFF;
177 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
178 break;
179 case REG_BG0HOFS:
180 value &= 0x01FF;
181 softwareRenderer->bg[0].x = value;
182 break;
183 case REG_BG0VOFS:
184 value &= 0x01FF;
185 softwareRenderer->bg[0].y = value;
186 break;
187 case REG_BG1HOFS:
188 value &= 0x01FF;
189 softwareRenderer->bg[1].x = value;
190 break;
191 case REG_BG1VOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[1].y = value;
194 break;
195 case REG_BG2HOFS:
196 value &= 0x01FF;
197 softwareRenderer->bg[2].x = value;
198 break;
199 case REG_BG2VOFS:
200 value &= 0x01FF;
201 softwareRenderer->bg[2].y = value;
202 break;
203 case REG_BG3HOFS:
204 value &= 0x01FF;
205 softwareRenderer->bg[3].x = value;
206 break;
207 case REG_BG3VOFS:
208 value &= 0x01FF;
209 softwareRenderer->bg[3].y = value;
210 break;
211 case REG_BG2PA:
212 softwareRenderer->bg[2].dx = value;
213 break;
214 case REG_BG2PB:
215 softwareRenderer->bg[2].dmx = value;
216 break;
217 case REG_BG2PC:
218 softwareRenderer->bg[2].dy = value;
219 break;
220 case REG_BG2PD:
221 softwareRenderer->bg[2].dmy = value;
222 break;
223 case REG_BG2X_LO:
224 GBAVideoSoftwareRendererWriteBGX_LO(&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_BG2X_HI:
230 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
231 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
232 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
233 }
234 break;
235 case REG_BG2Y_LO:
236 GBAVideoSoftwareRendererWriteBGY_LO(&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_BG2Y_HI:
242 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
243 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
244 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
245 }
246 break;
247 case REG_BG3PA:
248 softwareRenderer->bg[3].dx = value;
249 break;
250 case REG_BG3PB:
251 softwareRenderer->bg[3].dmx = value;
252 break;
253 case REG_BG3PC:
254 softwareRenderer->bg[3].dy = value;
255 break;
256 case REG_BG3PD:
257 softwareRenderer->bg[3].dmy = value;
258 break;
259 case REG_BG3X_LO:
260 GBAVideoSoftwareRendererWriteBGX_LO(&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_BG3X_HI:
266 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
267 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
268 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
269 }
270 break;
271 case REG_BG3Y_LO:
272 GBAVideoSoftwareRendererWriteBGY_LO(&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_BG3Y_HI:
278 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
279 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
280 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
281 }
282 break;
283 case REG_BLDCNT:
284 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
285 value &= 0x3FFF;
286 break;
287 case REG_BLDALPHA:
288 softwareRenderer->blda = value & 0x1F;
289 if (softwareRenderer->blda > 0x10) {
290 softwareRenderer->blda = 0x10;
291 }
292 softwareRenderer->bldb = (value >> 8) & 0x1F;
293 if (softwareRenderer->bldb > 0x10) {
294 softwareRenderer->bldb = 0x10;
295 }
296 value &= 0x1F1F;
297 break;
298 case REG_BLDY:
299 if (value > 0x10) {
300 value = 0x10;
301 }
302 if (softwareRenderer->bldy != value) {
303 softwareRenderer->bldy = value;
304 softwareRenderer->blendDirty = true;
305 }
306 break;
307 case REG_WIN0H:
308 softwareRenderer->winN[0].h.end = value;
309 softwareRenderer->winN[0].h.start = value >> 8;
310 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
311 softwareRenderer->winN[0].h.start = 0;
312 }
313 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
314 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
315 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
316 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
317 }
318 }
319 break;
320 case REG_WIN1H:
321 softwareRenderer->winN[1].h.end = value;
322 softwareRenderer->winN[1].h.start = value >> 8;
323 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
324 softwareRenderer->winN[1].h.start = 0;
325 }
326 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
327 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
328 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
329 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
330 }
331 }
332 break;
333 case REG_WIN0V:
334 softwareRenderer->winN[0].v.end = value;
335 softwareRenderer->winN[0].v.start = value >> 8;
336 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
337 softwareRenderer->winN[0].v.start = 0;
338 }
339 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
340 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
341 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
342 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
343 }
344 }
345 break;
346 case REG_WIN1V:
347 softwareRenderer->winN[1].v.end = value;
348 softwareRenderer->winN[1].v.start = value >> 8;
349 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
350 softwareRenderer->winN[1].v.start = 0;
351 }
352 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
353 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
354 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
355 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
356 }
357 }
358 break;
359 case REG_WININ:
360 value &= 0x3F3F;
361 softwareRenderer->winN[0].control.packed = value;
362 softwareRenderer->winN[1].control.packed = value >> 8;
363 break;
364 case REG_WINOUT:
365 value &= 0x3F3F;
366 softwareRenderer->winout.packed = value;
367 softwareRenderer->objwin.packed = value >> 8;
368 break;
369 case REG_MOSAIC:
370 softwareRenderer->mosaic = value;
371 break;
372 case REG_GREENSWP:
373 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
374 break;
375 default:
376 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
377 }
378 softwareRenderer->nextIo[address >> 1] = value;
379 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
380 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
381 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
382 }
383 return value;
384}
385
386static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
387 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
388 if (renderer->cache) {
389 mCacheSetWriteVRAM(renderer->cache, address);
390 }
391 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
392 softwareRenderer->bg[0].yCache = -1;
393 softwareRenderer->bg[1].yCache = -1;
394 softwareRenderer->bg[2].yCache = -1;
395 softwareRenderer->bg[3].yCache = -1;
396}
397
398static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
399 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
400 UNUSED(oam);
401 softwareRenderer->oamDirty = 1;
402 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
403}
404
405static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
406 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
407 color_t color = mColorFrom555(value);
408 softwareRenderer->normalPalette[address >> 1] = color;
409 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
410 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
411 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
412 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
413 }
414 if (renderer->cache) {
415 mCacheSetWritePalette(renderer->cache, address >> 1, color);
416 }
417 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
418}
419
420static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
421 if (win->v.end >= win->v.start) {
422 if (y >= win->v.end) {
423 return;
424 }
425 if (y < win->v.start) {
426 return;
427 }
428 } else if (y >= win->v.end && y < win->v.start) {
429 return;
430 }
431 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
432 struct WindowN splits[2] = { *win, *win };
433 splits[0].h.start = 0;
434 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
435 _breakWindowInner(softwareRenderer, &splits[0]);
436 _breakWindowInner(softwareRenderer, &splits[1]);
437 } else {
438 _breakWindowInner(softwareRenderer, win);
439 }
440}
441
442static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
443 int activeWindow;
444 int startX = 0;
445 if (win->h.end > 0) {
446 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
447 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
448 // Insert a window before the end of the active window
449 struct Window oldWindow = softwareRenderer->windows[activeWindow];
450 if (win->h.start > startX) {
451 // And after the start of the active window
452 int nextWindow = softwareRenderer->nWindows;
453 ++softwareRenderer->nWindows;
454 for (; nextWindow > activeWindow; --nextWindow) {
455 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
456 }
457 softwareRenderer->windows[activeWindow].endX = win->h.start;
458 ++activeWindow;
459 }
460 softwareRenderer->windows[activeWindow].control = win->control;
461 softwareRenderer->windows[activeWindow].endX = win->h.end;
462 if (win->h.end >= oldWindow.endX) {
463 // Trim off extra windows we've overwritten
464 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
465 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
466 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
467 return;
468 }
469 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
470 --softwareRenderer->nWindows;
471 }
472 } else {
473 ++activeWindow;
474 int nextWindow = softwareRenderer->nWindows;
475 ++softwareRenderer->nWindows;
476 for (; nextWindow > activeWindow; --nextWindow) {
477 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
478 }
479 softwareRenderer->windows[activeWindow] = oldWindow;
480 }
481 break;
482 }
483 startX = softwareRenderer->windows[activeWindow].endX;
484 }
485 }
486#ifdef DEBUG
487 if (softwareRenderer->nWindows > MAX_WINDOW) {
488 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
489 }
490#endif
491}
492
493static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
494 int i;
495 int oamMax = 0;
496 for (i = 0; i < 128; ++i) {
497 struct GBAObj obj;
498 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
499 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
500 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
501 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
502 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
503 if (GBAObjAttributesAIsTransformed(obj.a)) {
504 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
505 }
506 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
507 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
508 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
509 renderer->sprites[oamMax].obj = obj;
510 ++oamMax;
511 }
512 }
513 }
514 renderer->oamMax = oamMax;
515 renderer->oamDirty = 0;
516}
517
518static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
519 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
520
521 if (y == VIDEO_VERTICAL_PIXELS - 1) {
522 softwareRenderer->nextY = 0;
523 } else {
524 softwareRenderer->nextY = y + 1;
525 }
526
527 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
528 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
529 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
530 dirty = true;
531 }
532
533 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
538 if (!dirty) {
539 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
540 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
541 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
542 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
543 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
544 }
545 return;
546 }
547
548 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
549 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
550 int x;
551 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
552 row[x] = GBA_COLOR_WHITE;
553 }
554 return;
555 }
556
557 int x;
558 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
559 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
560 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
561 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
562 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
563 }
564
565 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
566 softwareRenderer->nWindows = 1;
567 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
568 softwareRenderer->windows[0].control = softwareRenderer->winout;
569 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
570 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
571 }
572 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
573 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
574 }
575 } else {
576 softwareRenderer->windows[0].control.packed = 0xFF;
577 }
578
579 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
580 if (softwareRenderer->blendDirty) {
581 _updatePalettes(softwareRenderer);
582 softwareRenderer->blendDirty = false;
583 }
584
585 int w;
586 x = 0;
587 for (w = 0; w < softwareRenderer->nWindows; ++w) {
588 // TOOD: handle objwin on backdrop
589 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
590 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
591 backdrop |= softwareRenderer->normalPalette[0];
592 } else {
593 backdrop |= softwareRenderer->variantPalette[0];
594 }
595 int end = softwareRenderer->windows[w].endX;
596 for (; x < end - 3; x += 4) {
597 softwareRenderer->row[x] = backdrop;
598 softwareRenderer->row[x + 1] = backdrop;
599 softwareRenderer->row[x + 2] = backdrop;
600 softwareRenderer->row[x + 3] = backdrop;
601 }
602 for (; x < end; ++x) {
603 softwareRenderer->row[x] = backdrop;
604 }
605 }
606
607 _drawScanline(softwareRenderer, y);
608
609 if (softwareRenderer->target2Bd) {
610 x = 0;
611 for (w = 0; w < softwareRenderer->nWindows; ++w) {
612 uint32_t backdrop = 0;
613 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
614 backdrop |= softwareRenderer->normalPalette[0];
615 } else {
616 backdrop |= softwareRenderer->variantPalette[0];
617 }
618 int end = softwareRenderer->windows[w].endX;
619 for (; x < end; ++x) {
620 uint32_t color = softwareRenderer->row[x];
621 if (color & FLAG_TARGET_1) {
622 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
623 }
624 }
625 }
626 }
627 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
628 x = 0;
629 uint32_t mask = 0xFF000000 & ~FLAG_OBJWIN;
630 uint32_t match = FLAG_REBLEND;
631 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
632 mask |= FLAG_OBJWIN;
633 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
634 match |= FLAG_OBJWIN;
635 }
636 }
637 for (w = 0; w < softwareRenderer->nWindows; ++w) {
638 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
639 continue;
640 }
641 int end = softwareRenderer->windows[w].endX;
642 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
643 for (; x < end; ++x) {
644 uint32_t color = softwareRenderer->row[x];
645 if ((color & mask) == match) {
646 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
647 }
648 }
649 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
650 for (; x < end; ++x) {
651 uint32_t color = softwareRenderer->row[x];
652 if ((color & mask) == match) {
653 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
654 }
655 }
656 }
657 }
658 }
659
660#ifdef COLOR_16_BIT
661 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
662 row[x] = softwareRenderer->row[x];
663 row[x + 1] = softwareRenderer->row[x + 1];
664 row[x + 2] = softwareRenderer->row[x + 2];
665 row[x + 3] = softwareRenderer->row[x + 3];
666 }
667#else
668 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
669#endif
670 CLEAN_SCANLINE(softwareRenderer, y);
671}
672
673static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
674 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
675
676 softwareRenderer->nextY = 0;
677 if (softwareRenderer->temporaryBuffer) {
678 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
679 softwareRenderer->temporaryBuffer = 0;
680 }
681 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
682 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
683 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
684 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
685}
686
687static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
688 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
689 *stride = softwareRenderer->outputBufferStride;
690 *pixels = softwareRenderer->outputBuffer;
691}
692
693static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
694 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
695
696 const color_t* colorPixels = pixels;
697 unsigned i;
698 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
699 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
700 }
701}
702
703static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
704 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
705 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
706 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
707 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
708}
709
710static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
711 UNUSED(renderer);
712 bg->priority = GBARegisterBGCNTGetPriority(value);
713 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
714 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
715 bg->multipalette = GBARegisterBGCNTGet256Color(value);
716 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
717 bg->overflow = GBARegisterBGCNTGetOverflow(value);
718 bg->size = GBARegisterBGCNTGetSize(value);
719}
720
721static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
722 bg->refx = (bg->refx & 0xFFFF0000) | value;
723 bg->sx = bg->refx;
724}
725
726static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
727 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
728 bg->refx <<= 4;
729 bg->refx >>= 4;
730 bg->sx = bg->refx;
731}
732
733static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
734 bg->refy = (bg->refy & 0xFFFF0000) | value;
735 bg->sy = bg->refy;
736}
737
738static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
739 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
740 bg->refy <<= 4;
741 bg->refy >>= 4;
742 bg->sy = bg->refy;
743}
744
745static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
746 enum BlendEffect oldEffect = renderer->blendEffect;
747
748 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
749 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
750 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
751 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
752 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
753 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
754 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
755 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
756
757 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
758 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
759 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
760 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
761 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
762
763 if (oldEffect != renderer->blendEffect) {
764 renderer->blendDirty = true;
765 }
766}
767
768#define TEST_LAYER_ENABLED(X) \
769 (renderer->bg[X].enabled && \
770 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
771 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
772 renderer->bg[X].priority == priority)
773
774static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
775 int w;
776 renderer->end = 0;
777 int spriteLayers = 0;
778 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
779 if (renderer->oamDirty) {
780 _cleanOAM(renderer);
781 }
782 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
783 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
784 int mosaicY = y - (y % mosaicV);
785 for (w = 0; w < renderer->nWindows; ++w) {
786 renderer->start = renderer->end;
787 renderer->end = renderer->windows[w].endX;
788 renderer->currentWindow = renderer->windows[w].control;
789 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
790 continue;
791 }
792 int i;
793 int drawn;
794
795 for (i = 0; i < renderer->oamMax; ++i) {
796 int localY = y;
797 if (renderer->spriteCyclesRemaining <= 0) {
798 break;
799 }
800 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
801 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
802 localY = mosaicY;
803 }
804 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
805 continue;
806 }
807 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
808 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
809 }
810 }
811 }
812
813 unsigned priority;
814 for (priority = 0; priority < 4; ++priority) {
815 renderer->end = 0;
816 for (w = 0; w < renderer->nWindows; ++w) {
817 renderer->start = renderer->end;
818 renderer->end = renderer->windows[w].endX;
819 renderer->currentWindow = renderer->windows[w].control;
820 if (spriteLayers & (1 << priority)) {
821 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
822 }
823 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
824 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
825 }
826 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
827 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
828 }
829 if (TEST_LAYER_ENABLED(2)) {
830 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
831 case 0:
832 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
833 break;
834 case 1:
835 case 2:
836 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
837 break;
838 case 3:
839 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
840 break;
841 case 4:
842 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
843 break;
844 case 5:
845 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
846 break;
847 }
848 }
849 if (TEST_LAYER_ENABLED(3)) {
850 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
851 case 0:
852 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
853 break;
854 case 2:
855 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
856 break;
857 }
858 }
859 }
860 }
861 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
862 renderer->bg[2].sx += renderer->bg[2].dmx;
863 renderer->bg[2].sy += renderer->bg[2].dmy;
864 renderer->bg[3].sx += renderer->bg[3].dmx;
865 renderer->bg[3].sy += renderer->bg[3].dmy;
866 }
867}
868
869static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
870 int i;
871 if (renderer->blendEffect == BLEND_BRIGHTEN) {
872 for (i = 0; i < 512; ++i) {
873 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
874 }
875 } else if (renderer->blendEffect == BLEND_DARKEN) {
876 for (i = 0; i < 512; ++i) {
877 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
878 }
879 } else {
880 for (i = 0; i < 512; ++i) {
881 renderer->variantPalette[i] = renderer->normalPalette[i];
882 }
883 }
884}