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 }
144}
145
146static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
147 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
148 UNUSED(softwareRenderer);
149}
150
151static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
152 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
153 if (renderer->cache) {
154 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
155 }
156
157 switch (address) {
158 case REG_DISPCNT:
159 softwareRenderer->dispcnt = value;
160 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
161 break;
162 case REG_BG0CNT:
163 value &= 0xDFFF;
164 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
165 break;
166 case REG_BG1CNT:
167 value &= 0xDFFF;
168 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
169 break;
170 case REG_BG2CNT:
171 value &= 0xFFFF;
172 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
173 break;
174 case REG_BG3CNT:
175 value &= 0xFFFF;
176 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
177 break;
178 case REG_BG0HOFS:
179 value &= 0x01FF;
180 softwareRenderer->bg[0].x = value;
181 break;
182 case REG_BG0VOFS:
183 value &= 0x01FF;
184 softwareRenderer->bg[0].y = value;
185 break;
186 case REG_BG1HOFS:
187 value &= 0x01FF;
188 softwareRenderer->bg[1].x = value;
189 break;
190 case REG_BG1VOFS:
191 value &= 0x01FF;
192 softwareRenderer->bg[1].y = value;
193 break;
194 case REG_BG2HOFS:
195 value &= 0x01FF;
196 softwareRenderer->bg[2].x = value;
197 break;
198 case REG_BG2VOFS:
199 value &= 0x01FF;
200 softwareRenderer->bg[2].y = value;
201 break;
202 case REG_BG3HOFS:
203 value &= 0x01FF;
204 softwareRenderer->bg[3].x = value;
205 break;
206 case REG_BG3VOFS:
207 value &= 0x01FF;
208 softwareRenderer->bg[3].y = value;
209 break;
210 case REG_BG2PA:
211 softwareRenderer->bg[2].dx = value;
212 break;
213 case REG_BG2PB:
214 softwareRenderer->bg[2].dmx = value;
215 break;
216 case REG_BG2PC:
217 softwareRenderer->bg[2].dy = value;
218 break;
219 case REG_BG2PD:
220 softwareRenderer->bg[2].dmy = value;
221 break;
222 case REG_BG2X_LO:
223 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
224 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
225 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
226 }
227 break;
228 case REG_BG2X_HI:
229 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
230 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
231 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
232 }
233 break;
234 case REG_BG2Y_LO:
235 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
236 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
237 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
238 }
239 break;
240 case REG_BG2Y_HI:
241 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
242 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
243 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
244 }
245 break;
246 case REG_BG3PA:
247 softwareRenderer->bg[3].dx = value;
248 break;
249 case REG_BG3PB:
250 softwareRenderer->bg[3].dmx = value;
251 break;
252 case REG_BG3PC:
253 softwareRenderer->bg[3].dy = value;
254 break;
255 case REG_BG3PD:
256 softwareRenderer->bg[3].dmy = value;
257 break;
258 case REG_BG3X_LO:
259 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
260 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
261 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
262 }
263 break;
264 case REG_BG3X_HI:
265 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
266 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
267 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
268 }
269 break;
270 case REG_BG3Y_LO:
271 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
272 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
273 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
274 }
275 break;
276 case REG_BG3Y_HI:
277 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
278 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
279 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
280 }
281 break;
282 case REG_BLDCNT:
283 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
284 value &= 0x3FFF;
285 break;
286 case REG_BLDALPHA:
287 softwareRenderer->blda = value & 0x1F;
288 if (softwareRenderer->blda > 0x10) {
289 softwareRenderer->blda = 0x10;
290 }
291 softwareRenderer->bldb = (value >> 8) & 0x1F;
292 if (softwareRenderer->bldb > 0x10) {
293 softwareRenderer->bldb = 0x10;
294 }
295 value &= 0x1F1F;
296 break;
297 case REG_BLDY:
298 value &= 0x1F;
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}
393
394static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
395 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
396 UNUSED(oam);
397 softwareRenderer->oamDirty = 1;
398 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
399}
400
401static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
402 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
403 color_t color = mColorFrom555(value);
404 softwareRenderer->normalPalette[address >> 1] = color;
405 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
406 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
407 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
408 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
409 }
410 if (renderer->cache) {
411 mCacheSetWritePalette(renderer->cache, address >> 1, color);
412 }
413 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
414}
415
416static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
417 if (win->v.end >= win->v.start) {
418 if (y >= win->v.end) {
419 return;
420 }
421 if (y < win->v.start) {
422 return;
423 }
424 } else if (y >= win->v.end && y < win->v.start) {
425 return;
426 }
427 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
428 struct WindowN splits[2] = { *win, *win };
429 splits[0].h.start = 0;
430 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
431 _breakWindowInner(softwareRenderer, &splits[0]);
432 _breakWindowInner(softwareRenderer, &splits[1]);
433 } else {
434 _breakWindowInner(softwareRenderer, win);
435 }
436}
437
438static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
439 int activeWindow;
440 int startX = 0;
441 if (win->h.end > 0) {
442 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
443 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
444 // Insert a window before the end of the active window
445 struct Window oldWindow = softwareRenderer->windows[activeWindow];
446 if (win->h.start > startX) {
447 // And after the start of the active window
448 int nextWindow = softwareRenderer->nWindows;
449 ++softwareRenderer->nWindows;
450 for (; nextWindow > activeWindow; --nextWindow) {
451 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
452 }
453 softwareRenderer->windows[activeWindow].endX = win->h.start;
454 ++activeWindow;
455 }
456 softwareRenderer->windows[activeWindow].control = win->control;
457 softwareRenderer->windows[activeWindow].endX = win->h.end;
458 if (win->h.end >= oldWindow.endX) {
459 // Trim off extra windows we've overwritten
460 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
461 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
462 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
463 return;
464 }
465 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
466 --softwareRenderer->nWindows;
467 }
468 } else {
469 ++activeWindow;
470 int nextWindow = softwareRenderer->nWindows;
471 ++softwareRenderer->nWindows;
472 for (; nextWindow > activeWindow; --nextWindow) {
473 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
474 }
475 softwareRenderer->windows[activeWindow] = oldWindow;
476 }
477 break;
478 }
479 startX = softwareRenderer->windows[activeWindow].endX;
480 }
481 }
482#ifdef DEBUG
483 if (softwareRenderer->nWindows > MAX_WINDOW) {
484 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
485 }
486#endif
487}
488
489static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
490 int i;
491 int oamMax = 0;
492 for (i = 0; i < 128; ++i) {
493 struct GBAObj obj;
494 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
495 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
496 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
497 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
498 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
499 if (GBAObjAttributesAIsTransformed(obj.a)) {
500 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
501 }
502 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
503 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
504 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
505 renderer->sprites[oamMax].obj = obj;
506 ++oamMax;
507 }
508 }
509 }
510 renderer->oamMax = oamMax;
511 renderer->oamDirty = 0;
512}
513
514static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
515 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
516
517 if (y == VIDEO_VERTICAL_PIXELS - 1) {
518 softwareRenderer->nextY = 0;
519 } else {
520 softwareRenderer->nextY = y + 1;
521 }
522
523 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
524 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
525 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
526 dirty = true;
527 }
528
529 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
530 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
531 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
532 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
533
534 if (!dirty) {
535 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
536 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
537 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
538 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
539 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
540 }
541 return;
542 }
543
544 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
545 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
546 int x;
547 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
548 row[x] = GBA_COLOR_WHITE;
549 }
550 return;
551 }
552
553 int x;
554 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
555 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
556 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
557 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
558 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
559 }
560
561 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
562 softwareRenderer->nWindows = 1;
563 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
564 softwareRenderer->windows[0].control = softwareRenderer->winout;
565 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
566 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
567 }
568 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
569 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
570 }
571 } else {
572 softwareRenderer->windows[0].control.packed = 0xFF;
573 }
574
575 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
576 if (softwareRenderer->blendDirty) {
577 _updatePalettes(softwareRenderer);
578 softwareRenderer->blendDirty = false;
579 }
580
581 int w;
582 x = 0;
583 for (w = 0; w < softwareRenderer->nWindows; ++w) {
584 // TOOD: handle objwin on backdrop
585 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
586 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
587 backdrop |= softwareRenderer->normalPalette[0];
588 } else {
589 backdrop |= softwareRenderer->variantPalette[0];
590 }
591 int end = softwareRenderer->windows[w].endX;
592 for (; x < end - 3; x += 4) {
593 softwareRenderer->row[x] = backdrop;
594 softwareRenderer->row[x + 1] = backdrop;
595 softwareRenderer->row[x + 2] = backdrop;
596 softwareRenderer->row[x + 3] = backdrop;
597 }
598 for (; x < end; ++x) {
599 softwareRenderer->row[x] = backdrop;
600 }
601 }
602
603 _drawScanline(softwareRenderer, y);
604
605 if (softwareRenderer->target2Bd) {
606 x = 0;
607 for (w = 0; w < softwareRenderer->nWindows; ++w) {
608 uint32_t backdrop = 0;
609 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
610 backdrop |= softwareRenderer->normalPalette[0];
611 } else {
612 backdrop |= softwareRenderer->variantPalette[0];
613 }
614 int end = softwareRenderer->windows[w].endX;
615 for (; x < end; ++x) {
616 uint32_t color = softwareRenderer->row[x];
617 if (color & FLAG_TARGET_1) {
618 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
619 }
620 }
621 }
622 }
623 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
624 x = 0;
625 for (w = 0; w < softwareRenderer->nWindows; ++w) {
626 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
627 continue;
628 }
629 int end = softwareRenderer->windows[w].endX;
630 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
631 for (; x < end; ++x) {
632 uint32_t color = softwareRenderer->row[x];
633 if ((color & 0xFF000000) == FLAG_REBLEND) {
634 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
635 }
636 }
637 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
638 for (; x < end; ++x) {
639 uint32_t color = softwareRenderer->row[x];
640 if ((color & 0xFF000000) == FLAG_REBLEND) {
641 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
642 }
643 }
644 }
645 }
646 }
647
648#ifdef COLOR_16_BIT
649 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
650 row[x] = softwareRenderer->row[x];
651 row[x + 1] = softwareRenderer->row[x + 1];
652 row[x + 2] = softwareRenderer->row[x + 2];
653 row[x + 3] = softwareRenderer->row[x + 3];
654 }
655#else
656 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
657#endif
658 CLEAN_SCANLINE(softwareRenderer, y);
659}
660
661static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
662 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
663
664 softwareRenderer->nextY = 0;
665 if (softwareRenderer->temporaryBuffer) {
666 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
667 softwareRenderer->temporaryBuffer = 0;
668 }
669 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
670 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
671 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
672 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
673}
674
675static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
676 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
677 *stride = softwareRenderer->outputBufferStride;
678 *pixels = softwareRenderer->outputBuffer;
679}
680
681static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
682 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
683
684 const color_t* colorPixels = pixels;
685 unsigned i;
686 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
687 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
688 }
689}
690
691static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
692 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
693 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
694 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
695 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
696}
697
698static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
699 UNUSED(renderer);
700 bg->priority = GBARegisterBGCNTGetPriority(value);
701 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
702 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
703 bg->multipalette = GBARegisterBGCNTGet256Color(value);
704 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
705 bg->overflow = GBARegisterBGCNTGetOverflow(value);
706 bg->size = GBARegisterBGCNTGetSize(value);
707}
708
709static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
710 bg->refx = (bg->refx & 0xFFFF0000) | value;
711 bg->sx = bg->refx;
712}
713
714static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
715 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
716 bg->refx <<= 4;
717 bg->refx >>= 4;
718 bg->sx = bg->refx;
719}
720
721static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
722 bg->refy = (bg->refy & 0xFFFF0000) | value;
723 bg->sy = bg->refy;
724}
725
726static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
727 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
728 bg->refy <<= 4;
729 bg->refy >>= 4;
730 bg->sy = bg->refy;
731}
732
733static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
734 enum BlendEffect oldEffect = renderer->blendEffect;
735
736 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
737 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
738 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
739 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
740 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
741 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
742 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
743 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
744
745 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
746 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
747 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
748 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
749 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
750
751 if (oldEffect != renderer->blendEffect) {
752 renderer->blendDirty = true;
753 }
754}
755
756#define TEST_LAYER_ENABLED(X) \
757 (renderer->bg[X].enabled && \
758 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
759 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
760 renderer->bg[X].priority == priority)
761
762static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
763 int w;
764 renderer->end = 0;
765 int spriteLayers = 0;
766 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
767 if (renderer->oamDirty) {
768 _cleanOAM(renderer);
769 }
770 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
771 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
772 int mosaicY = y - (y % mosaicV);
773 for (w = 0; w < renderer->nWindows; ++w) {
774 renderer->start = renderer->end;
775 renderer->end = renderer->windows[w].endX;
776 renderer->currentWindow = renderer->windows[w].control;
777 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
778 continue;
779 }
780 int i;
781 int drawn;
782
783 for (i = 0; i < renderer->oamMax; ++i) {
784 int localY = y;
785 if (renderer->spriteCyclesRemaining <= 0) {
786 break;
787 }
788 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
789 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
790 localY = mosaicY;
791 }
792 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
793 continue;
794 }
795 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
796 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
797 }
798 }
799 }
800
801 unsigned priority;
802 for (priority = 0; priority < 4; ++priority) {
803 renderer->end = 0;
804 for (w = 0; w < renderer->nWindows; ++w) {
805 renderer->start = renderer->end;
806 renderer->end = renderer->windows[w].endX;
807 renderer->currentWindow = renderer->windows[w].control;
808 if (spriteLayers & (1 << priority)) {
809 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
810 }
811 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
812 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
813 }
814 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
815 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
816 }
817 if (TEST_LAYER_ENABLED(2)) {
818 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
819 case 0:
820 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
821 break;
822 case 1:
823 case 2:
824 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
825 break;
826 case 3:
827 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
828 break;
829 case 4:
830 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
831 break;
832 case 5:
833 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
834 break;
835 }
836 }
837 if (TEST_LAYER_ENABLED(3)) {
838 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
839 case 0:
840 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
841 break;
842 case 2:
843 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
844 break;
845 }
846 }
847 }
848 }
849 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
850 renderer->bg[2].sx += renderer->bg[2].dmx;
851 renderer->bg[2].sy += renderer->bg[2].dmy;
852 renderer->bg[3].sx += renderer->bg[3].dmx;
853 renderer->bg[3].sy += renderer->bg[3].dmy;
854 }
855}
856
857static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
858 int i;
859 if (renderer->blendEffect == BLEND_BRIGHTEN) {
860 for (i = 0; i < 512; ++i) {
861 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
862 }
863 } else if (renderer->blendEffect == BLEND_DARKEN) {
864 for (i = 0; i < 512; ++i) {
865 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
866 }
867 } else {
868 for (i = 0; i < 512; ++i) {
869 renderer->variantPalette[i] = renderer->normalPalette[i];
870 }
871 }
872}