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 value &= 0xFFF7;
161 softwareRenderer->dispcnt = value;
162 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
163 break;
164 case REG_BG0CNT:
165 value &= 0xDFFF;
166 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
167 break;
168 case REG_BG1CNT:
169 value &= 0xDFFF;
170 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
171 break;
172 case REG_BG2CNT:
173 value &= 0xFFFF;
174 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
175 break;
176 case REG_BG3CNT:
177 value &= 0xFFFF;
178 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
179 break;
180 case REG_BG0HOFS:
181 value &= 0x01FF;
182 softwareRenderer->bg[0].x = value;
183 break;
184 case REG_BG0VOFS:
185 value &= 0x01FF;
186 softwareRenderer->bg[0].y = value;
187 break;
188 case REG_BG1HOFS:
189 value &= 0x01FF;
190 softwareRenderer->bg[1].x = value;
191 break;
192 case REG_BG1VOFS:
193 value &= 0x01FF;
194 softwareRenderer->bg[1].y = value;
195 break;
196 case REG_BG2HOFS:
197 value &= 0x01FF;
198 softwareRenderer->bg[2].x = value;
199 break;
200 case REG_BG2VOFS:
201 value &= 0x01FF;
202 softwareRenderer->bg[2].y = value;
203 break;
204 case REG_BG3HOFS:
205 value &= 0x01FF;
206 softwareRenderer->bg[3].x = value;
207 break;
208 case REG_BG3VOFS:
209 value &= 0x01FF;
210 softwareRenderer->bg[3].y = value;
211 break;
212 case REG_BG2PA:
213 softwareRenderer->bg[2].dx = value;
214 break;
215 case REG_BG2PB:
216 softwareRenderer->bg[2].dmx = value;
217 break;
218 case REG_BG2PC:
219 softwareRenderer->bg[2].dy = value;
220 break;
221 case REG_BG2PD:
222 softwareRenderer->bg[2].dmy = value;
223 break;
224 case REG_BG2X_LO:
225 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
226 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
227 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
228 }
229 break;
230 case REG_BG2X_HI:
231 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
232 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
233 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
234 }
235 break;
236 case REG_BG2Y_LO:
237 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
238 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
239 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
240 }
241 break;
242 case REG_BG2Y_HI:
243 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
244 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
245 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
246 }
247 break;
248 case REG_BG3PA:
249 softwareRenderer->bg[3].dx = value;
250 break;
251 case REG_BG3PB:
252 softwareRenderer->bg[3].dmx = value;
253 break;
254 case REG_BG3PC:
255 softwareRenderer->bg[3].dy = value;
256 break;
257 case REG_BG3PD:
258 softwareRenderer->bg[3].dmy = value;
259 break;
260 case REG_BG3X_LO:
261 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
262 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
263 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
264 }
265 break;
266 case REG_BG3X_HI:
267 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
268 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
269 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
270 }
271 break;
272 case REG_BG3Y_LO:
273 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
274 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
275 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
276 }
277 break;
278 case REG_BG3Y_HI:
279 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
280 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
281 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
282 }
283 break;
284 case REG_BLDCNT:
285 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
286 value &= 0x3FFF;
287 break;
288 case REG_BLDALPHA:
289 softwareRenderer->blda = value & 0x1F;
290 if (softwareRenderer->blda > 0x10) {
291 softwareRenderer->blda = 0x10;
292 }
293 softwareRenderer->bldb = (value >> 8) & 0x1F;
294 if (softwareRenderer->bldb > 0x10) {
295 softwareRenderer->bldb = 0x10;
296 }
297 value &= 0x1F1F;
298 break;
299 case REG_BLDY:
300 value &= 0x1F;
301 if (value > 0x10) {
302 value = 0x10;
303 }
304 if (softwareRenderer->bldy != value) {
305 softwareRenderer->bldy = value;
306 softwareRenderer->blendDirty = true;
307 }
308 break;
309 case REG_WIN0H:
310 softwareRenderer->winN[0].h.end = value;
311 softwareRenderer->winN[0].h.start = value >> 8;
312 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
313 softwareRenderer->winN[0].h.start = 0;
314 }
315 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
316 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
317 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
318 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
319 }
320 }
321 break;
322 case REG_WIN1H:
323 softwareRenderer->winN[1].h.end = value;
324 softwareRenderer->winN[1].h.start = value >> 8;
325 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
326 softwareRenderer->winN[1].h.start = 0;
327 }
328 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
329 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
330 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
331 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
332 }
333 }
334 break;
335 case REG_WIN0V:
336 softwareRenderer->winN[0].v.end = value;
337 softwareRenderer->winN[0].v.start = value >> 8;
338 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
339 softwareRenderer->winN[0].v.start = 0;
340 }
341 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
342 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
343 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
344 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
345 }
346 }
347 break;
348 case REG_WIN1V:
349 softwareRenderer->winN[1].v.end = value;
350 softwareRenderer->winN[1].v.start = value >> 8;
351 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
352 softwareRenderer->winN[1].v.start = 0;
353 }
354 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
355 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
356 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
357 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
358 }
359 }
360 break;
361 case REG_WININ:
362 value &= 0x3F3F;
363 softwareRenderer->winN[0].control.packed = value;
364 softwareRenderer->winN[1].control.packed = value >> 8;
365 break;
366 case REG_WINOUT:
367 value &= 0x3F3F;
368 softwareRenderer->winout.packed = value;
369 softwareRenderer->objwin.packed = value >> 8;
370 break;
371 case REG_MOSAIC:
372 softwareRenderer->mosaic = value;
373 break;
374 case REG_GREENSWP:
375 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
376 break;
377 default:
378 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
379 }
380 softwareRenderer->nextIo[address >> 1] = value;
381 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
382 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
383 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
384 }
385 return value;
386}
387
388static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
389 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
390 if (renderer->cache) {
391 mCacheSetWriteVRAM(renderer->cache, address);
392 }
393 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
394 softwareRenderer->bg[0].yCache = -1;
395 softwareRenderer->bg[1].yCache = -1;
396 softwareRenderer->bg[2].yCache = -1;
397 softwareRenderer->bg[3].yCache = -1;
398}
399
400static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
401 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
402 UNUSED(oam);
403 softwareRenderer->oamDirty = 1;
404 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
405}
406
407static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
408 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
409 color_t color = mColorFrom555(value);
410 softwareRenderer->normalPalette[address >> 1] = color;
411 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
412 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
413 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
414 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
415 }
416 if (renderer->cache) {
417 mCacheSetWritePalette(renderer->cache, address >> 1, color);
418 }
419 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
420}
421
422static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
423 if (win->v.end >= win->v.start) {
424 if (y >= win->v.end) {
425 return;
426 }
427 if (y < win->v.start) {
428 return;
429 }
430 } else if (y >= win->v.end && y < win->v.start) {
431 return;
432 }
433 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
434 struct WindowN splits[2] = { *win, *win };
435 splits[0].h.start = 0;
436 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
437 _breakWindowInner(softwareRenderer, &splits[0]);
438 _breakWindowInner(softwareRenderer, &splits[1]);
439 } else {
440 _breakWindowInner(softwareRenderer, win);
441 }
442}
443
444static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
445 int activeWindow;
446 int startX = 0;
447 if (win->h.end > 0) {
448 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
449 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
450 // Insert a window before the end of the active window
451 struct Window oldWindow = softwareRenderer->windows[activeWindow];
452 if (win->h.start > startX) {
453 // And after the start of the active window
454 int nextWindow = softwareRenderer->nWindows;
455 ++softwareRenderer->nWindows;
456 for (; nextWindow > activeWindow; --nextWindow) {
457 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
458 }
459 softwareRenderer->windows[activeWindow].endX = win->h.start;
460 ++activeWindow;
461 }
462 softwareRenderer->windows[activeWindow].control = win->control;
463 softwareRenderer->windows[activeWindow].endX = win->h.end;
464 if (win->h.end >= oldWindow.endX) {
465 // Trim off extra windows we've overwritten
466 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
467 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
468 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
469 return;
470 }
471 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
472 --softwareRenderer->nWindows;
473 }
474 } else {
475 ++activeWindow;
476 int nextWindow = softwareRenderer->nWindows;
477 ++softwareRenderer->nWindows;
478 for (; nextWindow > activeWindow; --nextWindow) {
479 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
480 }
481 softwareRenderer->windows[activeWindow] = oldWindow;
482 }
483 break;
484 }
485 startX = softwareRenderer->windows[activeWindow].endX;
486 }
487 }
488#ifdef DEBUG
489 if (softwareRenderer->nWindows > MAX_WINDOW) {
490 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
491 }
492#endif
493}
494
495static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
496 int i;
497 int oamMax = 0;
498 for (i = 0; i < 128; ++i) {
499 struct GBAObj obj;
500 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
501 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
502 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
503 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
504 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
505 if (GBAObjAttributesAIsTransformed(obj.a)) {
506 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
507 }
508 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
509 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
510 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
511 renderer->sprites[oamMax].obj = obj;
512 ++oamMax;
513 }
514 }
515 }
516 renderer->oamMax = oamMax;
517 renderer->oamDirty = 0;
518}
519
520static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
521 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
522
523 if (y == VIDEO_VERTICAL_PIXELS - 1) {
524 softwareRenderer->nextY = 0;
525 } else {
526 softwareRenderer->nextY = y + 1;
527 }
528
529 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
530 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
531 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
532 dirty = true;
533 }
534
535 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
536 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
537 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
538 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
539
540 if (!dirty) {
541 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
542 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
543 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
544 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
545 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
546 }
547 return;
548 }
549
550 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
551 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
552 int x;
553 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
554 row[x] = GBA_COLOR_WHITE;
555 }
556 return;
557 }
558
559 int x;
560 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
561 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
562 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
563 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
564 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
565 }
566
567 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
568 softwareRenderer->nWindows = 1;
569 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
570 softwareRenderer->windows[0].control = softwareRenderer->winout;
571 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
572 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
573 }
574 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
575 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
576 }
577 } else {
578 softwareRenderer->windows[0].control.packed = 0xFF;
579 }
580
581 if (softwareRenderer->blendDirty) {
582 _updatePalettes(softwareRenderer);
583 softwareRenderer->blendDirty = false;
584 }
585
586 int w;
587 x = 0;
588 for (w = 0; w < softwareRenderer->nWindows; ++w) {
589 // TOOD: handle objwin on backdrop
590 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
591 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
592 backdrop |= softwareRenderer->normalPalette[0];
593 } else {
594 backdrop |= softwareRenderer->variantPalette[0];
595 }
596 int end = softwareRenderer->windows[w].endX;
597 for (; x < end - 3; x += 4) {
598 softwareRenderer->row[x] = backdrop;
599 softwareRenderer->row[x + 1] = backdrop;
600 softwareRenderer->row[x + 2] = backdrop;
601 softwareRenderer->row[x + 3] = backdrop;
602 }
603 for (; x < end; ++x) {
604 softwareRenderer->row[x] = backdrop;
605 }
606 }
607
608 _drawScanline(softwareRenderer, y);
609
610 if (softwareRenderer->target2Bd) {
611 x = 0;
612 for (w = 0; w < softwareRenderer->nWindows; ++w) {
613 uint32_t backdrop = 0;
614 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
615 backdrop |= softwareRenderer->normalPalette[0];
616 } else {
617 backdrop |= softwareRenderer->variantPalette[0];
618 }
619 int end = softwareRenderer->windows[w].endX;
620 for (; x < end; ++x) {
621 uint32_t color = softwareRenderer->row[x];
622 if (color & FLAG_TARGET_1) {
623 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
624 }
625 }
626 }
627 }
628 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
629 x = 0;
630 uint32_t mask = 0xFF000000 & ~FLAG_OBJWIN;
631 uint32_t match = FLAG_REBLEND;
632 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
633 mask |= FLAG_OBJWIN;
634 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
635 match |= FLAG_OBJWIN;
636 }
637 }
638 for (w = 0; w < softwareRenderer->nWindows; ++w) {
639 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
640 continue;
641 }
642 int end = softwareRenderer->windows[w].endX;
643 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
644 for (; x < end; ++x) {
645 uint32_t color = softwareRenderer->row[x];
646 if ((color & mask) == match) {
647 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
648 }
649 }
650 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
651 for (; x < end; ++x) {
652 uint32_t color = softwareRenderer->row[x];
653 if ((color & mask) == match) {
654 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
655 }
656 }
657 }
658 }
659 }
660
661#ifdef COLOR_16_BIT
662 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
663 row[x] = softwareRenderer->row[x];
664 row[x + 1] = softwareRenderer->row[x + 1];
665 row[x + 2] = softwareRenderer->row[x + 2];
666 row[x + 3] = softwareRenderer->row[x + 3];
667 }
668#else
669 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
670#endif
671 CLEAN_SCANLINE(softwareRenderer, y);
672}
673
674static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
675 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
676
677 softwareRenderer->nextY = 0;
678 if (softwareRenderer->temporaryBuffer) {
679 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
680 softwareRenderer->temporaryBuffer = 0;
681 }
682 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
683 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
684 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
685 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
686
687 if (softwareRenderer->bg[0].enabled > 0) {
688 softwareRenderer->bg[0].enabled = 4;
689 }
690 if (softwareRenderer->bg[1].enabled > 0) {
691 softwareRenderer->bg[1].enabled = 4;
692 }
693 if (softwareRenderer->bg[2].enabled > 0) {
694 softwareRenderer->bg[2].enabled = 4;
695 }
696 if (softwareRenderer->bg[3].enabled > 0) {
697 softwareRenderer->bg[3].enabled = 4;
698 }
699}
700
701static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
702 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
703 *stride = softwareRenderer->outputBufferStride;
704 *pixels = softwareRenderer->outputBuffer;
705}
706
707static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
708 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
709
710 const color_t* colorPixels = pixels;
711 unsigned i;
712 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
713 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
714 }
715}
716
717static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
718 if (renderer->d.disableBG[bg] || !active) {
719 renderer->bg[bg].enabled = 0;
720 } else if (!renderer->bg[bg].enabled && active) {
721 if (renderer->nextY == 0) {
722 renderer->bg[bg].enabled = 4;
723 } else {
724 renderer->bg[bg].enabled = 1;
725 }
726 }
727}
728
729static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
730 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
731 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
732 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
733 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
734}
735
736static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
737 UNUSED(renderer);
738 bg->priority = GBARegisterBGCNTGetPriority(value);
739 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
740 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
741 bg->multipalette = GBARegisterBGCNTGet256Color(value);
742 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
743 bg->overflow = GBARegisterBGCNTGetOverflow(value);
744 bg->size = GBARegisterBGCNTGetSize(value);
745}
746
747static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
748 bg->refx = (bg->refx & 0xFFFF0000) | value;
749 bg->sx = bg->refx;
750}
751
752static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
753 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
754 bg->refx <<= 4;
755 bg->refx >>= 4;
756 bg->sx = bg->refx;
757}
758
759static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
760 bg->refy = (bg->refy & 0xFFFF0000) | value;
761 bg->sy = bg->refy;
762}
763
764static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
765 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
766 bg->refy <<= 4;
767 bg->refy >>= 4;
768 bg->sy = bg->refy;
769}
770
771static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
772 enum BlendEffect oldEffect = renderer->blendEffect;
773
774 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
775 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
776 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
777 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
778 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
779 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
780 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
781 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
782
783 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
784 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
785 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
786 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
787 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
788
789 if (oldEffect != renderer->blendEffect) {
790 renderer->blendDirty = true;
791 }
792}
793
794#define TEST_LAYER_ENABLED(X) \
795 (renderer->bg[X].enabled == 4 && \
796 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
797 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
798 renderer->bg[X].priority == priority)
799
800static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
801 int w;
802 renderer->end = 0;
803 int spriteLayers = 0;
804 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
805 if (renderer->oamDirty) {
806 _cleanOAM(renderer);
807 }
808 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
809 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
810 int mosaicY = y - (y % mosaicV);
811 for (w = 0; w < renderer->nWindows; ++w) {
812 renderer->start = renderer->end;
813 renderer->end = renderer->windows[w].endX;
814 renderer->currentWindow = renderer->windows[w].control;
815 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
816 continue;
817 }
818 int i;
819 int drawn;
820
821 for (i = 0; i < renderer->oamMax; ++i) {
822 int localY = y;
823 if (renderer->spriteCyclesRemaining <= 0) {
824 break;
825 }
826 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
827 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
828 localY = mosaicY;
829 }
830 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
831 continue;
832 }
833 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
834 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
835 }
836 }
837 }
838
839 unsigned priority;
840 for (priority = 0; priority < 4; ++priority) {
841 renderer->end = 0;
842 for (w = 0; w < renderer->nWindows; ++w) {
843 renderer->start = renderer->end;
844 renderer->end = renderer->windows[w].endX;
845 renderer->currentWindow = renderer->windows[w].control;
846 if (spriteLayers & (1 << priority)) {
847 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
848 }
849 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
850 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
851 }
852 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
853 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
854 }
855 if (TEST_LAYER_ENABLED(2)) {
856 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
857 case 0:
858 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
859 break;
860 case 1:
861 case 2:
862 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
863 break;
864 case 3:
865 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
866 break;
867 case 4:
868 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
869 break;
870 case 5:
871 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
872 break;
873 }
874 }
875 if (TEST_LAYER_ENABLED(3)) {
876 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
877 case 0:
878 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
879 break;
880 case 2:
881 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
882 break;
883 }
884 }
885 }
886 }
887 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
888 renderer->bg[2].sx += renderer->bg[2].dmx;
889 renderer->bg[2].sy += renderer->bg[2].dmy;
890 renderer->bg[3].sx += renderer->bg[3].dmx;
891 renderer->bg[3].sy += renderer->bg[3].dmy;
892 }
893
894 if (renderer->bg[0].enabled > 0 && renderer->bg[0].enabled < 4) {
895 ++renderer->bg[0].enabled;
896 }
897 if (renderer->bg[1].enabled > 0 && renderer->bg[1].enabled < 4) {
898 ++renderer->bg[1].enabled;
899 }
900 if (renderer->bg[2].enabled > 0 && renderer->bg[2].enabled < 4) {
901 ++renderer->bg[2].enabled;
902 }
903 if (renderer->bg[3].enabled > 0 && renderer->bg[3].enabled < 4) {
904 ++renderer->bg[3].enabled;
905 }
906}
907
908static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
909 int i;
910 if (renderer->blendEffect == BLEND_BRIGHTEN) {
911 for (i = 0; i < 512; ++i) {
912 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
913 }
914 } else if (renderer->blendEffect == BLEND_DARKEN) {
915 for (i = 0; i < 512; ++i) {
916 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
917 }
918 } else {
919 for (i = 0; i < 512; ++i) {
920 renderer->variantPalette[i] = renderer->normalPalette[i];
921 }
922 }
923}